US20120063935A1 - Inverter-Integrated Electric Compressor - Google Patents
Inverter-Integrated Electric Compressor Download PDFInfo
- Publication number
- US20120063935A1 US20120063935A1 US13/320,530 US201013320530A US2012063935A1 US 20120063935 A1 US20120063935 A1 US 20120063935A1 US 201013320530 A US201013320530 A US 201013320530A US 2012063935 A1 US2012063935 A1 US 2012063935A1
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- United States
- Prior art keywords
- board
- control circuit
- circuit board
- vibration
- inverter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
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- 230000037431 insertion Effects 0.000 claims description 22
- 238000003780 insertion Methods 0.000 claims description 22
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- 239000000463 material Substances 0.000 claims description 4
- 238000004378 air conditioning Methods 0.000 claims description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 10
- 239000003990 capacitor Substances 0.000 description 9
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000005192 partition Methods 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/121—Casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/30—Casings or housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/808—Electronic circuits (e.g. inverters) installed inside the machine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/12—Vibration
Definitions
- the present invention relates to an inverter-integrated electric compressor which incorporates a motor drive circuit including an inverter, and specifically relates to an inverter-integrated electric compressor which prevents external vibration from transmitting to a control circuit board of the motor drive circuit.
- Such a structure as disclosed in Patent document 1 is known as a structure of an inverter-integrated electric compressor which incorporates a motor drive circuit including an inverter therein.
- a printed circuit board is fixed so as to be clipped between a structural body extending from an electric motor housing and a top lid, in order to enhance the vibration resistance of the printed circuit board composing a part of the motor drive circuit.
- Patent document 2 discloses an automotive electric compressor which is filled with insulation gel agent as covering a circuit board for a countermeasure against vibration of circuit boards, etc.
- Patent document 3 discloses an electric compressor in which a heavy load made of potting material is placed on the center of a circuit board so as to function as a vibration-isolating member, in order to prevent vibration of the circuit board without filling gel thereinto.
- Patent document 1 JP2006-177214-A
- Patent document 2 JP2006-316754-A
- Patent document 3 JP2008-133729-A
- the vibration of the control circuit board of a motor drive circuit including an inverter can be prevented to some extent by introducing such structures as disclosed in Patent documents 1-3.
- the vibration of the control circuit board cannot be perfectly restrained even by applying such structures.
- external vibration transmitted to the control circuit board makes the control circuit board itself generate bending and vibration, it has been difficult to eradicate the possibility that component parts which have been placed on the control circuit board might fall away from the control circuit board.
- an object of the present invention is to provide an inverter-integrated electric compressor, of which control circuit board of a motor drive circuit is prevented from vibrating as much as possible, having high performance reliability.
- an inverter-integrated electric compressor is an inverter-integrated electric compressor, wherein a compressor incorporates a motor, an inverter section having a motor drive circuit to drive the motor is provided with a control circuit board, and electric component parts including the control circuit board are fixed in a housing space surrounded by a compressor housing, characterized in that the control circuit board is fixed through a board-fixing section in the housing space and a board vibration-isolating member, which is made of an electrically insulative elastic material, is provided so as to interpose between the control circuit board and the board-fixing section.
- the board-fixing section can be realized by a plate-like fixing member (board-fixing plate) which fixes the control circuit board, for example.
- the control circuit board can be fixed directly to a compressor housing itself as a board-fixing section, with no fixing member.
- the inverter-integrated electric compressor according to the present invention makes it possible that the control circuit board is prevented from bending and vibrating which are accompanied by vibration transmitted from outside, because the control circuit board is fixed through the board-fixing section in the housing space surrounded by a compressor housing while the board vibration-isolating member made of electrically insulative elastic material is provided so as to interpose between the control circuit board and the board-fixing section. It is preferable that the board vibration-isolating member is bonded to the control circuit board or the board-fixing section, from a viewpoint of an easy assembling.
- a frame member having a concave holding section with a concave part formed into a concave shape is loaded onto the control circuit board while the board vibration-isolating member made of an electrically insulative elastic material is provided so as to interpose between the control circuit board and the frame member.
- the concave part of the concave holding section can be formed into a concave shape along outlines of electric component parts loaded onto the control circuit board so as to improve vibration prevention ability of the electric component parts.
- the control circuit board can be further prevented from bending and vibrating which are accompanied by vibration transmitted from the outside. It is preferable that the board vibration-isolating member is bonded to the frame member or the control circuit board from a viewpoint of an easy assembling. Alternatively, it is possible that a plurality of board vibration-isolating members are provided at either obverse side or reverse side of the control circuit board respectively.
- the electric component parts are sealed at least partially by an electrically insulative filler filled in the housing space.
- an electrically insulative filler such as urethane resin
- the motor drive circuit is kept electrically insulative while the control circuit board is further prevented from vibrating.
- the board vibration-isolating member is made of a material harder than the electrically insulative filler.
- synthetic rubber such as ethylene propylene rubber (EPDM) and silicone rubber or natural rubber can be employed as the board vibration-isolating member.
- EPDM ethylene propylene rubber
- being harder than the electrically insulative filler means that a hardness which is measured with a durometer in conformity with JISK6253 is higher than the electrically insulative filler.
- the control circuit board is provided with an insertion hole through which a part of the board vibration-isolating member is inserted so as to fix the vibration-isolating member onto the control circuit board, and that the board vibration-isolating member is provided with a neck part having a smaller diameter than the insertion hole and a locking part having a greater diameter than the insertion hole.
- the board vibration-isolating member can be easily set to a fixing position on the control circuit board.
- the board vibration-isolating members are disposed as being plane-symmetrical viewed from the control circuit board.
- the control circuit board is sandwiched from both top and bottom sides by the board vibration-isolating member, as more firmly achieving vibration prevention.
- the insertion hole is a through-hole and that one board vibration-isolating member between the control circuit board and the frame member is formed integrally with another board vibration-isolating member between the control circuit board and the board-fixing section.
- board vibration-isolating members provided at both top/bottom sides may be formed integrally, so as to decrease the number of component parts which compose the electric compressor while the board vibration-isolating member is easily fixed onto the control circuit board without bonding the board vibration-isolating member onto the control circuit board, and therefore, the electric compressor can be improved in assembly easiness.
- the board vibration-isolating member is formed such that the locking part is deformed elastically so as to come to have smaller diameter than the insertion hole when compression force is applied from outside and such that it is restored elastically so as to come to have greater diameter than the insertion hole when the compression force is removed.
- the board vibration-isolating member of which locking part is formed as such makes it easier to fix the board vibration-isolating member onto the control circuit board.
- the frame member is formed integrally with the board vibration-isolating member. If the frame member is formed integrally with the board vibration-isolating member made of electrically insulative elastic material, the number of component parts which compose the electric compressor can be decreased and the frame member can absorb a shock even when the frame member is shocked from outside.
- the inverter-integrated electric compressor according to the present invention is used in an air conditioning system for vehicles. Namely, because the control circuit board which composes the motor drive circuit is highly prevented from vibrating in the inverter-integrated electric compressor, required performance reliability can be ensured even in an air conditioning system for vehicles, which is attached to engines and required to have superior vibration resistance.
- the inverter-integrated electric compressor according to the present invention makes it possible that the control circuit board is efficiently prevented from vibrating, because the control circuit board composing a part of the inverter section is fixed through the board-fixing section and the frame member is loaded onto the control circuit board while the board vibration-isolating member made of electrically insulative elastic material is interposed between the control circuit board and the board-fixing section as well as between the control circuit board and the frame member. Further, the vibration resistance of the electric compressor can be improved much more because the electric components are sealed at least partially by the electrically insulative filler which is filled into the housing space surrounded by the compressor housing.
- FIG. 1 is a longitudinal section view showing an inverter-integrated electric compressor according to an embodiment of the present invention.
- FIG. 2 is a perspective view showing the inverter section of FIG. 1 .
- FIG. 3 is an elevation view showing a fixing structure of the control circuit board of FIG. 2 in the housing space.
- FIG. 4 is a plan view showing the frame member of FIG. 3 .
- FIG. 5 is an elevation view showing examples (A)-(C), for combinations of a board vibration-isolating member and an insertion hole according to the present invention.
- FIG. 6 is a section view showing an embodiment of an inverter section according to the present invention.
- FIG. 7 is a section view showing another embodiment of the inverter section according to the present invention.
- FIG. 1 shows a whole of inverter-integrated electric compressor 1 according to an embodiment of the present invention.
- compression mechanism 2 is comprised of fixed scroll 3 and movable scroll 4 .
- Movable scroll 4 is made to swing relative to fixed scroll 3 as being prevented from rotation with a rotation-preventing mechanism.
- Motor 7 is incorporated in compressor housing (center housing) 6 .
- Main shaft 8 (rotation shaft) is driven to rotate by motor 7 .
- the rotation of main shaft 8 is converted into the swing of movable scroll 4 , through eccentric pin 9 which is provided at a side of main shaft 8 and eccentric bush 10 which is engaged rotatably therewith.
- refrigerant which has been sucked as fluid to be compressed, is led to compression mechanism 2 through a providing-section for motor 7 .
- the refrigerant which has been compressed by compression mechanism 2 is delivered via discharge hole 13 and discharge chamber 14 into an external circuit out of compressor housing (rear housing) 15 .
- Inverter section 21 having a circuit for driving motor 7 is provided in a housing space surrounded by compressor housing 12 (front housing).
- inverter section 21 is provided at an outer side of partition wall 22 , which is provided against the side of passageway for sucking refrigerant in compressor housing 12 .
- Inverter section 21 supplies electricity to motor 7 through lead wire and through seal terminal 23 (output terminal of inverter section 21 ) which is provided as penetrating partition wall 22 .
- seal terminal 23 In a providing-section for seal terminal 23 , the side of passageway for sucking refrigerant and the side of provided inverter section 21 are sealed.
- inverter section 21 is provided at an outer side of partition wall 22 , so that electric component parts composing inverter section 21 can be at least partially cooled through partition wall 22 by sucked refrigerant.
- Inverter section 21 is comprised of electrical components such as IPM (Intelligent Power Module) 25 , which has an inverter function, and control circuit board 26 and is also comprised of other electric component parts such as capacitor 27 which is provided separately or integrally therewith.
- IPM Intelligent Power Module
- control circuit board 26 is also comprised of other electric component parts such as capacitor 27 which is provided separately or integrally therewith.
- the opening side to the outside of compressor housing 12 which mounts inverter section 21 is covered as being sealed with lid member 29 , and motor drive circuit 21 is protected by lid member 29 .
- FIG. 2 is a perspective view showing inverter section 21 of FIG. 1 .
- Inverter section 21 is composed of noise filter 30 , HV connector 31 , LV connector 32 , etc., other than IPM 25 and control circuit board 26 . Because a lot of electric component parts are loaded onto control circuit board 26 , performance reliability of the electric compressor tends to be lost if vibration is not sufficiently prevented. Above all electric component parts, capacitor 27 is a component part which tends to fall away from a control circuit board under vibration thereof because of its great height when mounted on control circuit board 26 .
- FIG. 3 shows a structure where control circuit board 26 of FIG. 2 is fixed in a housing space surrounded by compressor housing 12 where compressor housing 12 , board-fixing plate 36 , control circuit board 26 and frame member 37 are placed according to placement order at the time of assembling, being depicted as an elevation view from the lower side of FIG. 2 .
- Control circuit board 26 is fixed on compressor housing 12 (front housing) by bolts through board-fixing plate 36 .
- Board vibration-isolating member 38 made of columned EPDM rubber is fixed to board-fixing plate 36 by bonding.
- Control circuit board 26 and board-fixing member 36 are fastened by bolts, so that board vibration-isolating member 38 is pushed to contact control circuit board 26 , as preventing vibration of control circuit board 26 .
- Board vibration-isolating member 39 is bonded to be fixed to frame member 37 as being positioned symmetrically from board vibration-isolating member 38 with respect to plane of control circuit board 26 .
- board-fixing plate 36 and frame member 37 to which board vibration-isolating members 38 , 39 are fixed by bonding respectively, are fixed by bolts as sandwiching control circuit board 26 , so that control circuit board 26 is prevented from bending and vibrating.
- FIG. 4 is a plan view of frame member 37 of FIG. 3 from the upper side of FIG. 3 .
- Frame member 37 has concave holding section 40 which has a concave part formed into a concave shape and vent hole 41 which is perforated in concave holding section 40 .
- Frame member 37 when loaded as covering control circuit board 26 as shown in FIG. 3 , forms the gap which can be filled with urethane resin as electrically insulative filler together with control circuit board 26 . This gap is sealed by filling with urethane resin, so that circuit component parts, such as control circuit board 26 and capacitor 27 placed on control circuit board 26 , can be further firmly prevented from vibrating.
- vent hole 41 makes it possible to prevent air from generating and staying inside urethane resin
- circuit component parts such as capacitor 27 can be firmly fixed onto control circuit board 26 after the urethane resin is hardened.
- board vibration-isolating member 39 is formed by material harder than urethane resin, even after the urethane resin is hardened the effect of vibration isolating for the control circuit board can be maintained.
- FIG. 5 is an elevation view showing examples (A)-(C) for combination of a board vibration-isolating member and an insertion hole for fixing the board vibration-isolating member onto the control circuit board.
- insertion holes 44 , 45 through which neck parts 42 , 43 of board vibration-isolating members 38 , 39 are inserted, are positioned symmetrically from each other with respect to plane of control circuit board 26 , where board vibration-isolating members 38 , 39 are locked onto control circuit board 26 by locking parts 46 , 47 .
- insertion holes 44 , 45 are positioned symmetrically from each other with respect to plane of control circuit board 26 , so that board-fixing plate 36 and frame member 37 push control circuit board 26 from both top and bottom sides with board vibration-isolating members 38 , 39 , so as to make it possible to prevent vibration of control circuit board 26 , and therefore, the effect of vibration isolating can be improved.
- a tip of neck part 50 of board vibration-isolating member 49 is provided with stopper part 51 having greater diameter than insertion hole 48 which is a through-hole.
- Example (C) is developed one of examples (A) and (B). Board vibration-isolating member 53 is fixed onto control circuit board 26 by inserting neck part 54 of board vibration-isolating member 53 into insertion hole 48 which is a through-hole.
- example (C) As with example (A) board-fixing plate 36 and frame member 37 push control circuit board 26 from both top and bottom sides with board vibration-isolating member 53 , so as to prevent vibration of control circuit board 26 .
- example (C) is a developed example where board vibration-isolating members 38 , 39 in example (A) are combined.
- FIG. 6 is a section view showing an embodiment of inverter section 21 as an application of the present invention.
- control circuit board 26 which is provided with electric component parts such as capacitor 27 , is fixed to compressor housing 12 as a board-fixing section through board vibration-isolating member 38 .
- electrically insulative filler such as urethane resin is filled in the housing space of compressor housing, so as to seal control circuit board 26 including electric component parts such as capacitor 27 .
- FIG. 7 is a section view showing another embodiment of inverter section 21 as an application of the present invention.
- control circuit board 26 which is provided with electric component parts such as capacitor 27 , is fixed to compressor housing 12 as a board-fixing section through board vibration-isolating member 38 , and is covered by frame member 37 at the upper side of FIG. 7 while board vibration-isolating member 39 is interposed between control circuit board 26 and frame member 37 .
- control circuit board 26 is fixed as sandwiched between board vibration-isolating members 38 , 39 from obverse side and reverse side, so that control circuit board 26 is efficiently prevented from vibrating.
- electrically insulative filler such as urethane resin is filled in the housing space of compressor housing 12 , so as to seal control circuit board 26 including electric component parts such as capacitor 27 .
- the inverter-integrated electric compressor according to the present invention is applicable to substantially all types of compressors, and is specifically suitable for a compressor to be mounted in vehicles where it is often mounted in a narrow space and its motor drive circuit is sensitive to heat and vibration.
- compressor housing front housing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Inverter Devices (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
An inverter-integrated electric compressor configured in such a manner that a motor is incorporated within a compressor, a control circuit board is provided to an inverter section which is provided with a motor drive circuit for driving the motor, and electric component parts including the control circuit board is fixed within a containment space surrounded by a compressor housing, wherein the control circuit board is fixed within the housing space through a board-fixing section, and a board vibration-isolating member, said board vibration-isolating member consisting of an electrically insulative elastic material, is provided between the control circuit board and the board-fixing section. A frame member having a convcave holding section may be loaded on the control circuit board, and a board vibration-isolating member, said board vibration-isolating member consisting of an electrically insulative elastic material, may be provided between the control circuit board and the frame member. The inverter-integrated electric compressor has highly reliable performance and configured in such a manner that the vibration of the control circuit board of the motor drive circuit is suppressed as much as possible.
Description
- The present invention relates to an inverter-integrated electric compressor which incorporates a motor drive circuit including an inverter, and specifically relates to an inverter-integrated electric compressor which prevents external vibration from transmitting to a control circuit board of the motor drive circuit.
- Such a structure as disclosed in
Patent document 1 is known as a structure of an inverter-integrated electric compressor which incorporates a motor drive circuit including an inverter therein. In such a structure, a printed circuit board is fixed so as to be clipped between a structural body extending from an electric motor housing and a top lid, in order to enhance the vibration resistance of the printed circuit board composing a part of the motor drive circuit. -
Patent document 2 discloses an automotive electric compressor which is filled with insulation gel agent as covering a circuit board for a countermeasure against vibration of circuit boards, etc.Patent document 3 discloses an electric compressor in which a heavy load made of potting material is placed on the center of a circuit board so as to function as a vibration-isolating member, in order to prevent vibration of the circuit board without filling gel thereinto. - Patent Documents
- Patent document 1: JP2006-177214-A
- Patent document 2: JP2006-316754-A
- Patent document 3: JP2008-133729-A
- Problems to be Solved by the Invention
- The vibration of the control circuit board of a motor drive circuit including an inverter can be prevented to some extent by introducing such structures as disclosed in Patent documents 1-3. However, the vibration of the control circuit board cannot be perfectly restrained even by applying such structures. Particularly, because external vibration transmitted to the control circuit board makes the control circuit board itself generate bending and vibration, it has been difficult to eradicate the possibility that component parts which have been placed on the control circuit board might fall away from the control circuit board.
- Therefore, being focused on the above-described problems, an object of the present invention is to provide an inverter-integrated electric compressor, of which control circuit board of a motor drive circuit is prevented from vibrating as much as possible, having high performance reliability.
- Means for Solving the Problems
- To achieve the above described object, an inverter-integrated electric compressor according to the present invention is an inverter-integrated electric compressor, wherein a compressor incorporates a motor, an inverter section having a motor drive circuit to drive the motor is provided with a control circuit board, and electric component parts including the control circuit board are fixed in a housing space surrounded by a compressor housing, characterized in that the control circuit board is fixed through a board-fixing section in the housing space and a board vibration-isolating member, which is made of an electrically insulative elastic material, is provided so as to interpose between the control circuit board and the board-fixing section. The board-fixing section can be realized by a plate-like fixing member (board-fixing plate) which fixes the control circuit board, for example. Alternatively, the control circuit board can be fixed directly to a compressor housing itself as a board-fixing section, with no fixing member.
- The inverter-integrated electric compressor according to the present invention makes it possible that the control circuit board is prevented from bending and vibrating which are accompanied by vibration transmitted from outside, because the control circuit board is fixed through the board-fixing section in the housing space surrounded by a compressor housing while the board vibration-isolating member made of electrically insulative elastic material is provided so as to interpose between the control circuit board and the board-fixing section. It is preferable that the board vibration-isolating member is bonded to the control circuit board or the board-fixing section, from a viewpoint of an easy assembling.
- In the inverter-integrated electric compressor according to the present invention, it is preferable that a frame member having a concave holding section with a concave part formed into a concave shape is loaded onto the control circuit board while the board vibration-isolating member made of an electrically insulative elastic material is provided so as to interpose between the control circuit board and the frame member. In addition, the concave part of the concave holding section can be formed into a concave shape along outlines of electric component parts loaded onto the control circuit board so as to improve vibration prevention ability of the electric component parts. When the frame member with the concave holding section is loaded onto the control circuit board while the board vibration-isolating member made of electrically insulative elastic material is provided as interposing between the control circuit board and the frame member, the control circuit board can be further prevented from bending and vibrating which are accompanied by vibration transmitted from the outside. It is preferable that the board vibration-isolating member is bonded to the frame member or the control circuit board from a viewpoint of an easy assembling. Alternatively, it is possible that a plurality of board vibration-isolating members are provided at either obverse side or reverse side of the control circuit board respectively.
- In the inverter-integrated electric compressor according to the present invention, it is preferable that the electric component parts are sealed at least partially by an electrically insulative filler filled in the housing space. When the electrically insulative filler, such as urethane resin, is filled in the housing space and at least a part of the electric component parts are sealed, the motor drive circuit is kept electrically insulative while the control circuit board is further prevented from vibrating.
- In the inverter-integrated electric compressor according to the present invention, it is preferable that the board vibration-isolating member is made of a material harder than the electrically insulative filler. Specifically when urethane resin is employed as the electrically insulative filler, synthetic rubber such as ethylene propylene rubber (EPDM) and silicone rubber or natural rubber can be employed as the board vibration-isolating member. Besides, being harder than the electrically insulative filler means that a hardness which is measured with a durometer in conformity with JISK6253 is higher than the electrically insulative filler.
- In the inverter-integrated electric compressor according to the present invention, it is preferable that the control circuit board is provided with an insertion hole through which a part of the board vibration-isolating member is inserted so as to fix the vibration-isolating member onto the control circuit board, and that the board vibration-isolating member is provided with a neck part having a smaller diameter than the insertion hole and a locking part having a greater diameter than the insertion hole. When such an insertion hole is provided, the board vibration-isolating member can be easily set to a fixing position on the control circuit board.
- In the inverter-integrated electric compressor according to the present invention, it is preferable that the board vibration-isolating members are disposed as being plane-symmetrical viewed from the control circuit board. When the board vibration-isolating members are disposed as plane-symmetrical as viewed from the control circuit board, the control circuit board is sandwiched from both top and bottom sides by the board vibration-isolating member, as more firmly achieving vibration prevention.
- In the inverter-integrated electric compressor according to the present invention, it is preferable that the insertion hole is a through-hole and that one board vibration-isolating member between the control circuit board and the frame member is formed integrally with another board vibration-isolating member between the control circuit board and the board-fixing section. Thus, board vibration-isolating members provided at both top/bottom sides may be formed integrally, so as to decrease the number of component parts which compose the electric compressor while the board vibration-isolating member is easily fixed onto the control circuit board without bonding the board vibration-isolating member onto the control circuit board, and therefore, the electric compressor can be improved in assembly easiness. It is preferable that the board vibration-isolating member is formed such that the locking part is deformed elastically so as to come to have smaller diameter than the insertion hole when compression force is applied from outside and such that it is restored elastically so as to come to have greater diameter than the insertion hole when the compression force is removed. The board vibration-isolating member of which locking part is formed as such makes it easier to fix the board vibration-isolating member onto the control circuit board.
- In the inverter-integrated electric compressor according to the present invention, it is possible that the frame member is formed integrally with the board vibration-isolating member. If the frame member is formed integrally with the board vibration-isolating member made of electrically insulative elastic material, the number of component parts which compose the electric compressor can be decreased and the frame member can absorb a shock even when the frame member is shocked from outside.
- It is suitably preferable that the inverter-integrated electric compressor according to the present invention is used in an air conditioning system for vehicles. Namely, because the control circuit board which composes the motor drive circuit is highly prevented from vibrating in the inverter-integrated electric compressor, required performance reliability can be ensured even in an air conditioning system for vehicles, which is attached to engines and required to have superior vibration resistance.
- Effect According to the Invention
- The inverter-integrated electric compressor according to the present invention makes it possible that the control circuit board is efficiently prevented from vibrating, because the control circuit board composing a part of the inverter section is fixed through the board-fixing section and the frame member is loaded onto the control circuit board while the board vibration-isolating member made of electrically insulative elastic material is interposed between the control circuit board and the board-fixing section as well as between the control circuit board and the frame member. Further, the vibration resistance of the electric compressor can be improved much more because the electric components are sealed at least partially by the electrically insulative filler which is filled into the housing space surrounded by the compressor housing.
-
FIG. 1 is a longitudinal section view showing an inverter-integrated electric compressor according to an embodiment of the present invention. -
FIG. 2 is a perspective view showing the inverter section ofFIG. 1 . -
FIG. 3 is an elevation view showing a fixing structure of the control circuit board ofFIG. 2 in the housing space. -
FIG. 4 is a plan view showing the frame member ofFIG. 3 . -
FIG. 5 is an elevation view showing examples (A)-(C), for combinations of a board vibration-isolating member and an insertion hole according to the present invention. -
FIG. 6 is a section view showing an embodiment of an inverter section according to the present invention. -
FIG. 7 is a section view showing another embodiment of the inverter section according to the present invention. - Hereinafter, desirable embodiments of the present invention will be explained as referring to figures.
-
FIG. 1 shows a whole of inverter-integratedelectric compressor 1 according to an embodiment of the present invention. InFIG. 1 ,compression mechanism 2 is comprised offixed scroll 3 andmovable scroll 4.Movable scroll 4 is made to swing relative tofixed scroll 3 as being prevented from rotation with a rotation-preventing mechanism. Motor 7 is incorporated in compressor housing (center housing) 6. Main shaft 8 (rotation shaft) is driven to rotate bymotor 7. The rotation ofmain shaft 8 is converted into the swing ofmovable scroll 4, througheccentric pin 9 which is provided at a side ofmain shaft 8 andeccentric bush 10 which is engaged rotatably therewith. In this embodiment, refrigerant, which has been sucked as fluid to be compressed, is led tocompression mechanism 2 through a providing-section formotor 7. The refrigerant which has been compressed bycompression mechanism 2 is delivered viadischarge hole 13 anddischarge chamber 14 into an external circuit out of compressor housing (rear housing) 15. -
Inverter section 21 having a circuit for drivingmotor 7 is provided in a housing space surrounded by compressor housing 12 (front housing). In further detail,inverter section 21 is provided at an outer side ofpartition wall 22, which is provided against the side of passageway for sucking refrigerant incompressor housing 12.Inverter section 21 supplies electricity tomotor 7 through lead wire and through seal terminal 23 (output terminal of inverter section 21) which is provided as penetratingpartition wall 22. In a providing-section forseal terminal 23, the side of passageway for sucking refrigerant and the side of providedinverter section 21 are sealed. Thusinverter section 21 is provided at an outer side ofpartition wall 22, so that electric component parts composinginverter section 21 can be at least partially cooled throughpartition wall 22 by sucked refrigerant. -
Inverter section 21 is comprised of electrical components such as IPM (Intelligent Power Module) 25, which has an inverter function, andcontrol circuit board 26 and is also comprised of other electric component parts such ascapacitor 27 which is provided separately or integrally therewith. The opening side to the outside ofcompressor housing 12 which mountsinverter section 21 is covered as being sealed withlid member 29, andmotor drive circuit 21 is protected bylid member 29. -
FIG. 2 is a perspective view showinginverter section 21 ofFIG. 1 .Inverter section 21 is composed ofnoise filter 30,HV connector 31,LV connector 32, etc., other thanIPM 25 andcontrol circuit board 26. Because a lot of electric component parts are loaded ontocontrol circuit board 26, performance reliability of the electric compressor tends to be lost if vibration is not sufficiently prevented. Above all electric component parts,capacitor 27 is a component part which tends to fall away from a control circuit board under vibration thereof because of its great height when mounted oncontrol circuit board 26. -
FIG. 3 shows a structure wherecontrol circuit board 26 ofFIG. 2 is fixed in a housing space surrounded bycompressor housing 12 wherecompressor housing 12, board-fixingplate 36,control circuit board 26 andframe member 37 are placed according to placement order at the time of assembling, being depicted as an elevation view from the lower side ofFIG. 2 .Control circuit board 26 is fixed on compressor housing 12 (front housing) by bolts through board-fixingplate 36. Board vibration-isolatingmember 38 made of columned EPDM rubber is fixed to board-fixingplate 36 by bonding.Control circuit board 26 and board-fixingmember 36 are fastened by bolts, so that board vibration-isolatingmember 38 is pushed to contactcontrol circuit board 26, as preventing vibration ofcontrol circuit board 26. Board vibration-isolatingmember 39 is bonded to be fixed to framemember 37 as being positioned symmetrically from board vibration-isolatingmember 38 with respect to plane ofcontrol circuit board 26. Thus board-fixingplate 36 andframe member 37, to which board vibration-isolatingmembers control circuit board 26, so thatcontrol circuit board 26 is prevented from bending and vibrating. -
FIG. 4 is a plan view offrame member 37 ofFIG. 3 from the upper side ofFIG. 3 .Frame member 37 has concave holdingsection 40 which has a concave part formed into a concave shape and venthole 41 which is perforated inconcave holding section 40.Frame member 37, when loaded as coveringcontrol circuit board 26 as shown inFIG. 3 , forms the gap which can be filled with urethane resin as electrically insulative filler together withcontrol circuit board 26. This gap is sealed by filling with urethane resin, so that circuit component parts, such ascontrol circuit board 26 andcapacitor 27 placed oncontrol circuit board 26, can be further firmly prevented from vibrating. In addition, because providing withvent hole 41 makes it possible to prevent air from generating and staying inside urethane resin, circuit component parts such ascapacitor 27 can be firmly fixed ontocontrol circuit board 26 after the urethane resin is hardened. In addition, because board vibration-isolatingmember 39 is formed by material harder than urethane resin, even after the urethane resin is hardened the effect of vibration isolating for the control circuit board can be maintained. -
FIG. 5 is an elevation view showing examples (A)-(C) for combination of a board vibration-isolating member and an insertion hole for fixing the board vibration-isolating member onto the control circuit board. In example (A), insertion holes 44,45, through whichneck parts members control circuit board 26, where board vibration-isolatingmembers control circuit board 26 by lockingparts control circuit board 26, so that board-fixingplate 36 andframe member 37 pushcontrol circuit board 26 from both top and bottom sides with board vibration-isolatingmembers control circuit board 26, and therefore, the effect of vibration isolating can be improved. In example (B), a tip ofneck part 50 of board vibration-isolatingmember 49 is provided withstopper part 51 having greater diameter thaninsertion hole 48 which is a through-hole. Afterstopper part 51 is elastically deformed and inserted intoinsertion hole 48,stopper part 51 is elastically restored at the opposite side of lockingpart 52 as viewed fromcontrol circuit board 26, so as to achieve a structure where board vibration-isolatingmember 49 cannot easily fall away frominsertion hole 48 ofcontrol circuit board 26. Example (C) is developed one of examples (A) and (B). Board vibration-isolatingmember 53 is fixed ontocontrol circuit board 26 by insertingneck part 54 of board vibration-isolatingmember 53 intoinsertion hole 48 which is a through-hole. One lockingpart 55 of board vibration-isolatingmember 53 is elastically deformed and inserted intoinsertion hole 48, and is elastically restored at the opposite side of the other lockingpart 56 with respect to controlcircuit board 26, so as to achieve a structure where board vibration-isolatingmember 53 cannot easily fall away frominsertion hole 48 ofcontrol circuit board 26, as with example (B). In example (C), as with example (A) board-fixingplate 36 andframe member 37 pushcontrol circuit board 26 from both top and bottom sides with board vibration-isolatingmember 53, so as to prevent vibration ofcontrol circuit board 26. Namely, example (C) is a developed example where board vibration-isolatingmembers -
FIG. 6 is a section view showing an embodiment ofinverter section 21 as an application of the present invention. In this embodiment,control circuit board 26, which is provided with electric component parts such ascapacitor 27, is fixed tocompressor housing 12 as a board-fixing section through board vibration-isolatingmember 38. In such a condition where the circuit board is prevented from vibrating, electrically insulative filler such as urethane resin is filled in the housing space of compressor housing, so as to sealcontrol circuit board 26 including electric component parts such ascapacitor 27. -
FIG. 7 is a section view showing another embodiment ofinverter section 21 as an application of the present invention. In this embodiment,control circuit board 26, which is provided with electric component parts such ascapacitor 27, is fixed tocompressor housing 12 as a board-fixing section through board vibration-isolatingmember 38, and is covered byframe member 37 at the upper side ofFIG. 7 while board vibration-isolatingmember 39 is interposed betweencontrol circuit board 26 andframe member 37. Thus controlcircuit board 26 is fixed as sandwiched between board vibration-isolatingmembers control circuit board 26 is efficiently prevented from vibrating. In such a condition where the circuit board is prevented from vibrating, electrically insulative filler such as urethane resin is filled in the housing space ofcompressor housing 12, so as to sealcontrol circuit board 26 including electric component parts such ascapacitor 27. - The inverter-integrated electric compressor according to the present invention is applicable to substantially all types of compressors, and is specifically suitable for a compressor to be mounted in vehicles where it is often mounted in a narrow space and its motor drive circuit is sensitive to heat and vibration.
- 1: inverter-integrated electric compressor
- 2: compression mechanism
- 3: fixed scroll
- 4: movable scroll
- 6: compressor housing (center housing)
- 7: motor
- 8: main shaft
- 9: eccentric pin
- 10: eccentric bush
- 12: compressor housing (front housing)
- 13: discharge hole
- 14: discharge chamber
- 15: compressor housing (rear housing)
- 21: inverter section
- 22: partition wall
- 23: seal terminal
- 25: IPM
- 26: control circuit board
- 27: capacitor
- 29: lid member
- 30: noise filter
- 31: HV connector
- 32: LV connector
- 36: board-fixing plate
- 37: frame member
- 38, 39, 49, 53: board vibration-isolating member
- 40: concave holding section
- 41: vent hole
- 42, 43, 50, 54: neck part
- 44, 45, 48: insertion hole
- 51: stopper part
- 46, 47, 52, 55, 56: locking part
Claims (9)
1. An inverter-integrated electric compressor, wherein a compressor incorporates a motor, an inverter section having a motor drive circuit to, drive said motor is provided with a control circuit board, and electric component parts including said control circuit board are fixed in a housing space surrounded by a compressor housing, characterized in that said control circuit board is fixed through a board-fixing section in said housing space and a vibration isolating for board vibration-isolating member, which is made of an electrically insulative elastic material, is provided so as to interpose between said control circuit board and said board-fixing section.
2. The inverter-integrated electric compressor according to claim 1 , wherein said electric component parts are sealed at least partially by an electrically insulative filler filled in said housing space.
3. The inverter-integrated electric compressor according to claim 2 , wherein said board vibration-isolating member is made of a material harder than said electrically insulative filler.
4. The inverter-integrated electric compressor according to claim 1 , wherein said control circuit board is provided with an insertion hole through which a part of said board vibration-isolating member is inserted so as to fix said vibration-isolating member onto said control circuit board, and that said board vibration-isolating member is provided with a neck part having a smaller diameter than said insertion hole and a locking part having a greater diameter than said insertion hole.
5. The inverter-integrated electric compressor according to claim 1 , wherein a frame member having a concave holding section with a concave part formed into a concave shape is loaded onto said control circuit board while said board vibration-isolating member made of an electrically insulative elastic material is provided so as to interpose between said control circuit board and said frame member.
6. The inverter-integrated electric compressor according to claim 5 , wherein said board vibration-isolating member is disposed as being plane-symmetrical viewed from said control circuit board.
7. The inverter-integrated electric compressor according to claim 5 , wherein said insertion hole is a through-hole and that one board vibration-isolating member between said control circuit board and said frame member is formed integrally with another board vibration-isolating member between said control circuit board and said board-fixing section.
8. The inverter-integrated electric compressor according to claim 5 , wherein said frame member is formed integrally with said board vibration-isolating member.
9. The inverter-integrated electric compressor according to claim 1 , wherein said compressor is used in an air conditioning system for vehicles.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-116275 | 2009-05-13 | ||
JP2009116275 | 2009-05-13 | ||
JP2009-204684 | 2009-09-04 | ||
JP2009204684A JP2010285980A (en) | 2009-05-13 | 2009-09-04 | Inverter-integrated electric compressor |
PCT/JP2010/058021 WO2010131671A1 (en) | 2009-05-13 | 2010-05-12 | Inverter-integrated electric compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120063935A1 true US20120063935A1 (en) | 2012-03-15 |
Family
ID=43085044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/320,530 Abandoned US20120063935A1 (en) | 2009-05-13 | 2010-05-12 | Inverter-Integrated Electric Compressor |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120063935A1 (en) |
EP (1) | EP2431611B1 (en) |
JP (1) | JP2010285980A (en) |
CN (1) | CN102422023A (en) |
WO (1) | WO2010131671A1 (en) |
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US20120076679A1 (en) * | 2009-05-29 | 2012-03-29 | Atsushi Saito | Inverter-Integrated Electric Compressor |
US20130108485A1 (en) * | 2011-10-31 | 2013-05-02 | Kabushiki Kaisha Toyota Jidoshokki | Motor-driven compressor |
US10221840B2 (en) | 2011-05-19 | 2019-03-05 | Valeo Japan Co. Ltd. | Modular electric compressor including a built-in securing device |
US20190162786A1 (en) * | 2017-11-24 | 2019-05-30 | Eaton Intelligent Power Limited | Measuring device for use in an electric switching device |
CN114255940A (en) * | 2021-12-13 | 2022-03-29 | 苏州新智机电工业有限公司 | Insulation structure of high-voltage controller of electric compressor |
US11486378B2 (en) * | 2020-01-30 | 2022-11-01 | Kabushiki Kaisha Toyota Jidoshokki | Electric compressor |
WO2023113046A1 (en) * | 2021-12-15 | 2023-06-22 | Valeo Japan Co., Ltd. | A motor driven compressor |
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JP5698007B2 (en) * | 2011-01-19 | 2015-04-08 | 株式会社ヴァレオジャパン | Electric compressor |
JP5697038B2 (en) | 2011-08-08 | 2015-04-08 | サンデン株式会社 | Electric circuit vibration-proof structure of electric compressor |
JP6178564B2 (en) * | 2012-12-04 | 2017-08-09 | カルソニックカンセイ株式会社 | Electric compressor |
CN104533771A (en) * | 2014-12-08 | 2015-04-22 | 重庆和平自动化工程股份有限公司 | Vehicular compressor |
BR102016013676B1 (en) * | 2016-01-15 | 2022-11-29 | Embraco Indústria De Compressores E Soluções E Refrigeração Ltda | SYSTEM, METHOD AND MEANS FOR CONNECTION AND FIXING AN ELECTRONIC CONTROL IN A HERMETIC COMPRESSOR AND HERMETIC COMPRESSOR |
JP7263058B2 (en) * | 2019-03-05 | 2023-04-24 | サンデン株式会社 | electric compressor |
JP7082101B2 (en) * | 2019-09-13 | 2022-06-07 | 矢崎総業株式会社 | Electrical junction box |
JP6854874B1 (en) * | 2019-12-11 | 2021-04-07 | 三菱電機株式会社 | Power converter |
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Also Published As
Publication number | Publication date |
---|---|
WO2010131671A1 (en) | 2010-11-18 |
CN102422023A (en) | 2012-04-18 |
EP2431611B1 (en) | 2016-08-17 |
EP2431611A1 (en) | 2012-03-21 |
JP2010285980A (en) | 2010-12-24 |
EP2431611A4 (en) | 2014-04-02 |
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