JP2006168427A - Cover structure of decompressor of air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover structure of a decompressor of an air conditioner for a vehicle capable of reducing molding costs and simplifing labors for installing a cover member of a decompressor. <P>SOLUTION: This air conditioner for a vehicle comprises an indoor air-conditioning unit 10, a refrigerant piping 22 connected to the side of the indoor air-conditioning unit 10 through an opening 51 of a vehicle body side partition 50 from a compartment exterior area, a decompressor 30 reducing the pressure of the refrigerant circulated through the refrigerant piping 22 and supplying it to a cooling evaporator 80, a refrigerant piping 21 connected with the compartment exterior area side through the opening 51 from the cooling evaporator 80, and a cover member 60 arranged between the indoor air-conditioning unit 10 and the vehicle side partition and molded to cover the entire decompressor 30 and the refrigerant pipings 21, 22. The cover member 60 is molded independently from air-conditioning casings 11b, 13. Thus, the air-conditioning casings 11b, 13 do not have such a shape that a tube part is projected, so as to simplify a resin mold structure. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cover structure for a decompressor of a vehicle air conditioner.

  2. Description of the Related Art Conventionally, in a vehicle air conditioner, an air blower that is disposed inside an instrument panel in a passenger compartment and generates air, a cooling evaporator that absorbs heat from the introduced air by evaporation of refrigerant and generates cool air, A heater core that generates hot air by heating the cool air from the evaporator with engine cooling water, a bypass passage that bypasses the heater core and allows the cool air to pass through, and air that is cold air flowing into the bypass passage and hot air flowing into the heater core An air mix door that adjusts the volume ratio according to the opening degree, and an indoor air conditioning unit that mixes the warm air from the heater core and the cold air from the bypass passage and blows the mixed air toward the passenger compartment as the conditioned air The thing is proposed (for example, refer patent document 1).

  On the other hand, although Patent Document 1 does not describe refrigerant pipes or pressure reducers, in a general vehicle air conditioner, from the engine room (region outside the vehicle compartment) to the indoor air conditioning unit side through the opening of the vehicle body side partition. A first refrigerant pipe to be connected; a decompressor disposed between the indoor air conditioning unit and the vehicle body side partition; and a refrigerant that is circulated through the first refrigerant pipe and decompresses the refrigerant toward a cooling evaporator; And a second refrigerant pipe that is connected to the engine room side through the opening of the vehicle body side partition wall and sends out the refrigerant evaporated by the cooling evaporator to the engine room side.

  In this, a decompressor cover member that is disposed between the air conditioning casing and the vehicle body side partition, is molded to cover the decompressor and the first and second refrigerant pipes, and is integrally formed with the air conditioning casing; A seal member is employed that is sandwiched between the decompressor cover member and the vehicle body-side partition wall and closely contacts the decompressor cover member and the vehicle body-side partition wall.

Here, since the seal member closely contacts the decompressor cover member and the vehicle body side partition wall, water, hot air, and odor are prevented from entering the vehicle compartment from the engine room through the opening of the vehicle body side partition wall. Yes.
JP 2004-249920 A

  By the way, as described above, when a casing in which the decompressor cover member and the air conditioning casing are integrated (hereinafter referred to as an integrated casing member) is adopted, the decompressor cover member is formed into a cylindrical shape from the air conditioning casing. Protruding shape.

  Here, when the air conditioning casing of the integrated casing is resin-molded with the upper mold and the lower mold, the cover member for the decompressor is disposed in a direction orthogonal to the mold drawing direction (vertical direction) (that is, in the horizontal direction). It will protrude in a cylindrical shape, and the integrated casing may be shaped to be undercut. For this reason, a slide core or the like is required as a resin mold, and the structure thereof becomes complicated, leading to an increase in cost of the resin mold.

  On the other hand, as the air-conditioning casing and the cover member for the pressure reducer, separately formed members are adopted, projecting slightly from the air-conditioning casing to cover a part of the pressure reducer, and the rest of the pressure reducer However, even in this case, the cylindrical part projects as an air-conditioning casing, and the reason is the same as in the case of the integrated casing member. As a result, the structure of the resin mold becomes complicated, and the cost of the resin mold increases.

  In addition, when the decompressor cover member and the air conditioning casing are separately molded to be separate parts, if the decompressor cover member and the air conditioning casing are fixed with a fastening member such as a screw, assembly is time-consuming and manufactured. This will increase costs.

  In view of the above points, it is a first object of the present invention to provide a cover structure for a decompressor of a vehicle air conditioner that can reduce the molding cost.

  A second object of the present invention is to provide a cover structure for a decompressor of a vehicle air conditioner that simplifies the work of assembling the cover member of the decompressor.

In order to achieve the above object, in the invention described in claim 1,
An air conditioning casing (11b, 11c, 13);
An indoor air conditioning unit (10) comprising: a cooling evaporator (80) housed in the air conditioning casing and absorbing heat from the air in the air conditioning casing to evaporate the refrigerant;
A first refrigerant pipe (22) connected to the indoor air conditioning unit side from the vehicle compartment outside area through the pipe through opening (51) of the vehicle body side partition wall (50);
A decompressor (30) that decompresses the refrigerant circulated through the first refrigerant pipe and sends the refrigerant toward the cooling evaporator;
A second refrigerant pipe (21) connected from the cooling evaporator to the vehicle exterior area side through the piping through opening and for sending the refrigerant evaporated by the cooling evaporator to the vehicle exterior area; ,
A cover member (60) disposed between the indoor air conditioning unit and the vehicle body side partition, and formed to cover the entire decompressor and the first and second refrigerant pipes;
The cover structure of a decompressor for a vehicle air conditioner, wherein the cover member is formed independently of the air conditioning casing.

  According to the first aspect of the invention, unlike the prior art, it is not necessary to integrate the cylinder portion (that is, the cover member) for covering part or all of the decompressor with the air conditioning casing. That is, the air-conditioning casing does not have a shape in which the cylindrical portion protrudes, and the structure of the resin mold can be simplified, so that the cost of the resin mold can be reduced.

In the invention according to claim 2,
An air conditioning casing (11b, 11c, 13);
An indoor air conditioning unit (10) comprising: a cooling evaporator (80) housed in the air conditioning casing and absorbing heat from the air in the air conditioning casing to evaporate the refrigerant;
A first refrigerant pipe (22) connected to the indoor air conditioning unit side from the vehicle compartment outside area through the pipe through opening (51) of the vehicle body side partition wall (50);
A decompressor (30) that decompresses the refrigerant circulated through the first refrigerant pipe and sends the refrigerant toward the cooling evaporator;
A second refrigerant pipe (21) connected from the cooling evaporator to the vehicle exterior area side through the piping through opening and for sending the refrigerant evaporated by the cooling evaporator to the vehicle exterior area; ,
A cover member (60) disposed between the indoor air conditioning unit and the vehicle body side partition and formed to cover the decompressor, the first refrigerant pipe (22), and the second refrigerant pipe (21). ), And
One of the cover member and the air conditioning casing is provided with an engaging portion (61a, 61b) for engaging and fixing the other to the other, and the cover of the decompressor of the vehicle air conditioner Construction.

  According to the invention described in claim 2, if the cover member and the air conditioning casing are engaged and fixed by the engaging portion, the assembling does not take time and an increase in manufacturing cost can be suppressed.

  According to the third aspect of the present invention, since one of the air conditioning casing and the cover member is provided with the positioning portion (63) for determining the other fixed position, the cover for the air conditioning casing is provided. The assembly of the members can be performed easily.

  According to a fourth aspect of the present invention, the air conditioning casing is provided with protrusions (14a, 14b) formed so as to protrude toward the vehicle body-side partition wall and contact the cover member. It is characterized by.

Further, as in the invention described in claim 5, a seal member (70) is provided between the cover member and the vehicle body side partition wall to closely contact the cover member and the vehicle body side partition wall,
The cover member is sandwiched and held between the air conditioning casing and the vehicle body side partition wall in a state where the cover member and the vehicle body side partition wall are in close contact with each other by the seal member.

  Therefore, once the cover member is held between the air conditioning casing and the vehicle body side partition wall, the cover member can be held between the air conditioning casing and the vehicle body side partition wall even if the above-described engaging portion is damaged.

  Further, as described above, the cover member and the vehicle body side partition wall are in close contact with each other by the seal member, so that noise, vibration, odor, and hot air intrude into the vehicle interior from the vehicle exterior region through the pipe penetration opening of the vehicle body side partition wall. Can be prevented.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3 indicate the direction in the vehicle mounted state. FIG. 1 is a view of an indoor air conditioning unit 10 as viewed from the front of the vehicle, FIG. 2 is a view of the indoor air conditioning unit 10 from the right side of the vehicle, and FIG. It is a figure from the upper side of the air conditioning unit 10.

  This indoor air-conditioning unit 10 is disposed inside a vehicle instrument panel (instrument panel) (not shown) at the foremost part of the vehicle interior. The indoor air conditioning unit 10 of this example includes a blower unit 11 and an air conditioning main unit 12. The blower unit 11 has an inside / outside air switching box 11a for switching and introducing inside / outside air at the upper part thereof, and a blower 11b is arranged below the inside / outside air switching box 11a.

  As is well known, the inside / outside air switching box 11a includes a resin casing 11c, and selectively opens either the outside air introduction port or the inside air introduction port of the casing 11c with the inside / outside air switching door to switch between the inside air and the outside air. To do. The blower 11 b drives a known centrifugal blower fan by an electric motor, and the blower outlet of the centrifugal blower fan is connected to the air inlet of the air conditioning main unit 12.

  The air conditioning main unit 12 has a resin case 13. The case 13 in this example includes a right case 13a located on the right side in the vehicle left-right direction, a left case 13b located on the left side in the vehicle left-right direction, and a lower case located below the left and right cases 13a, 13b. 13c and divided into three parts. And the case 13 is comprised by fastening these three division | segmentation cases 13a, 13b, 13c integrally using fastening means, such as a screw and a metal spring click.

  Here, among the three divided cases 13a, 13b, and 13c, the lower case 13c is provided with the air inlet portion (not shown), and the air blown from the blower 11b flows into the air inlet portion. Yes. As is well known, a cooling evaporator 80 (indicated by a wavy line in FIG. 1) is disposed upstream of the air passage formed in the case 13, and the cooling evaporator 80 includes a low-pressure refrigerant. The low-pressure refrigerant of the refrigeration cycle is circulated through the pipes 20 and 21. In the cooling evaporator 80, the low-pressure refrigerant in the refrigeration cycle absorbs heat from the air and evaporates to cool the air.

  Here, the low-pressure refrigerant pipe 20 is a refrigerant pipe for connecting between a decompressor (expansion valve) described later and the cooling evaporator 80. The low-pressure refrigerant pipe 21 is a refrigerant pipe for connecting between the cooling evaporator 80 and the compressor.

  On the other hand, a heater core (not shown) is arranged in the downstream portion of the air flow of the cooling evaporator 80, and the air is heated by using warm water (engine cooling water) as a heat source in the heater core. Hot water circulates in the heater core through the first and second hot water pipes.

  The temperature of the air blown into the passenger compartment is adjusted by well-known temperature adjusting means (not shown) such as an air mix door and a hot water flow rate adjusting valve provided in the air conditioning main unit 12, and the temperature adjusted air is discharged from the outlet. It blows out into the passenger compartment through a switching mechanism.

  Further, as shown in FIGS. 1 and 2, a decompressor 30 is provided between the indoor air conditioning unit 10 and the vehicle body side partition wall 50 (see FIG. 2) (that is, the partition wall between the vehicle interior and the vehicle exterior region). The decompressor 30 is connected to a high-pressure refrigerant pipe 22 (see FIG. 2).

  In the decompressor 30, the high-pressure refrigerant flowing in from the condenser arranged in the engine room (region outside the vehicle compartment) through the high-pressure refrigerant pipe 22 is depressurized and then passed through the low-pressure refrigerant pipe 20 to the cooling evaporator 80 (see FIG. 1). Send in.

  Here, as shown in FIG. 1, the high-pressure refrigerant pipe 22 is arranged so as to protrude from the decompressor 30 to the vehicle front side, and the low-pressure refrigerant pipe 21 also penetrates through the decompressor 30 and projects to the vehicle front side. Are arranged as follows.

  And the front-end | tip part of the low pressure refrigerant | coolant piping 21 and the high pressure refrigerant | coolant piping 22 is connected to the block joint (not shown) which makes a piping joint, and the low pressure refrigerant | coolant piping 21 is connected to a compressor through a block joint. The high-pressure refrigerant pipe 22 is connected to the capacitor through a block joint.

  Further, a resin cover member 60 is provided between the indoor air conditioning unit 10 and the vehicle body side partition wall 50, and the cover member 60 includes a hollow portion 61 as shown in FIGS. 4, 5, and 6. It is formed into a cylindrical shape and covers the entire decompressor 30, the high-pressure refrigerant pipe 22 and the low-pressure refrigerant pipe 21.

  4 is a view of the cover member 60 viewed from the rear side of the vehicle, FIG. 5 is a view of the cover member 60 viewed from the front side of the vehicle, and FIG. 6 is a view of the cover member 60 viewed from the right side of the vehicle. is there. Also, reference numeral 62 in FIG. 4 is a screw hole provided in the cover member.

  As shown in FIGS. 7 and 8, the left case 13 a is provided with a protruding portion 14 b that is formed so as to protrude toward the front side of the vehicle and come into contact with the cover member 60.

  In addition, a protrusion 14b that is formed so as to protrude from the resin casing 11c of the inside / outside air switching box 11a toward the front of the vehicle and come into contact with the cover member 60 is provided. The protrusions 14 a and 14 b are supported by surface contact from the vehicle rear side of the cover member 60.

  7 is a view of the single air conditioning unit 10 viewed from the front side of the vehicle with the cover member 60 removed. FIG. 8 shows the single air conditioning unit 10 viewed from the right side of the vehicle with the cover member 60 removed. FIG.

  Further, as shown in FIGS. 4 and 9, the cover member 60 is provided with engaging portions (claw portions) 61 a and 61 b that protrude to the rear side of the vehicle and engage with the protruding portions 14 a and 14 b. The engaging portions 61a and 61b are engaged with the tip portions of the engaging portions 61a and 61b which are formed in a key shape and enter the openings of the protruding portions 14a and 14b. 9A is a cross-sectional view taken along line AA in FIG. 4, and FIG. 9B is a cross-sectional view taken along line BB in FIG.

  Further, as shown in FIG. 3, the cover member 60 is provided with a boss portion 63 that protrudes toward the rear of the vehicle, and the boss portion 63 is provided for positioning the cover member 60 with respect to the indoor air conditioning unit 10. And is inserted into the hole 16 (see FIG. 7) of the protrusion 14a.

  Further, as shown in FIG. 2, a ring-shaped packing member 70 (that is, a seal member) is bonded to the front side of the cover member 60 with an adhesive or the like, and the packing member 70 is made of foamed urethane resin or the like. It serves as a seal member that tightly contacts between the cover member 60 and the vehicle body side partition wall 50.

  Here, the assembly of the cover member 60 will be described. The indoor air conditioning unit 10, the cover member 60, and the packing member 70 are prepared, and first, the packing member 70 is bonded to the vehicle front side of the cover member 60 with an adhesive or the like.

  Thereafter, in a state where the entire decompressor 30, the low-pressure refrigerant pipe 21 and the high-pressure refrigerant pipe 22 are inserted into the hollow part 61 of the cover member 60, the boss part 63 of the cover member 60 is inserted into the hole 16 (FIG. 7). The cover member 60 is positioned with respect to the indoor air conditioning unit 10.

  Thereafter, the engaging portions 61 a and 61 b of the cover member 60 are engaged with the protrusions 14 a and 14 b of the indoor air conditioning unit 10. As a result, the indoor air conditioning unit 10, the cover member 60, and the packing member 70 are combined. Thereby, the cover member 60 is temporarily fixed to the indoor air conditioning unit 10.

  Thereafter, the indoor air conditioning unit 10 is pressed against the vehicle body side partition wall 50 side (that is, the vehicle front side) together with the cover member 60 and the packing member 70 to fix the indoor air conditioning unit 10 to the vehicle body. For this reason, the cover member 60 is sandwiched and held between the vehicle body side partition wall 50 and the indoor air conditioning unit 10. At this time, the packing member 70 can bring the cover member 60 and the vehicle body side partition wall 50 into close contact.

  Next, the effect of this embodiment is demonstrated.

  That is, in the cover structure of the decompressor of the vehicle air conditioner according to the present embodiment, the indoor air conditioning unit 10 including the cooling evaporator 80 and the indoor air conditioning unit 10 side are connected from the vehicle exterior region through the vehicle body side partition wall 51. A refrigerant pipe 22, a decompressor 30 that depressurizes and circulates the refrigerant circulated through the refrigerant pipe 22, and sends the refrigerant to the cooling evaporator 80. The cooling evaporator 80 is connected to the vehicle exterior area side through the opening 51. The refrigerant pipe 21 for sending the refrigerant evaporated by the cooling evaporator 80 to the outside region of the vehicle compartment, the indoor air conditioning unit 10 and the vehicle body side partition wall, and the entire decompressor 30 and the first and second The cover member 60 is formed so as to cover the refrigerant pipes 22 and 21, and the cover member 60 is formed independently of the air conditioning casings 11 b and 13. And wherein the Rukoto.

  Therefore, unlike the prior art, it is not necessary to integrate the cylinder portion (that is, the cover member) for covering part or all of the decompressor 30 with the air conditioning casing. That is, the air-conditioning casings 11b and 13 do not have a shape in which the cylindrical portion protrudes, and the structure of the resin mold can be simplified, so the cost of the resin mold can be reduced.

  By the way, in the case of adopting the cover member and the air conditioning casing that are independently molded, if the cover member and the air conditioning casing are fixed with a fastening member such as a screw, it takes time to assemble and causes an increase in manufacturing cost. It will be.

  In contrast, if the cover member 60 and the air-conditioning casings 11b and 13 are engaged and fixed by the engaging portions 61a and 61b, assembly is not troublesome and an increase in manufacturing cost can be suppressed.

  Moreover, if the position of the cover member 60 with respect to the air-conditioning casings 11b and 13 is determined using the boss | hub part 63 provided in the cover member 60, the assembly | attachment of the cover member 60 with respect to the air-conditioning casings 11b and 13 can be performed easily.

  In the present embodiment, the cover member 60 is sandwiched and held between the air conditioning casings 11b and 13 and the vehicle body side partition wall 50 while the cover member 60 and the vehicle body side partition wall 50 are in close contact with each other by the seal member 70. Has been.

  Therefore, once the cover member 60 is held between the air conditioning casings 11b and 13 and the vehicle body side partition wall, even if the above-described engaging portions 61a and 61b are damaged, the cover member 60 is attached to the indoor air conditioning unit 10 and It can be held between the vehicle body side bulkheads 50.

  In the above-described embodiment, the example in which the engaging portions 61a and 61b are provided in the cover member 60 has been described. However, instead of this, the air-conditioning casings 11b and 13 may be provided with the engaging portions 61a and 61b.

  In the above-described embodiment, the example in which the boss portion 63 is provided in the cover member 60 and the hole portion 16 is provided in the air conditioning casing 13b has been described. Instead, the hole portion 16 is provided in the cover member 60 and the boss portion is provided. The part 63 may be provided in the air conditioning casing 13b.

  In the above-described embodiment, the cover member 60 provided with the engaging portions 61a and 61b is used so as to cover the entire decompressor 30 in carrying out the invention described in claim 2. However, the present invention is not limited to this, and the cover member 60 may be formed so as to cover a part of the decompressor 30.

  Hereinafter, the correspondence relationship between the above-described embodiment and the configuration within the scope of the claims will be described. The air conditioning casing described in the claims corresponds to the casings 11 b and 13, and the pipe penetration opening is the opening 51 of the vehicle body side partition wall 50. The low-pressure refrigerant pipe 21 corresponds to the first refrigerant pipe, the high-pressure refrigerant pipe 22 corresponds to the second refrigerant pipe, and the packing member 70 corresponds to the seal member.

It is a figure which shows the indoor air-conditioning unit and pressure reducer which concern on this invention. It is a side view of the indoor air-conditioning unit and decompressor of FIG. It is a top view of the indoor air-conditioning unit and decompressor of FIG. It is the figure which looked at the cover member of FIG. 1 from the vehicle rear side. It is the figure which looked at the cover member of FIG. 1 from the vehicle front side. It is a side view of the cover member of FIG. It is a figure which shows the indoor air-conditioning unit and decompressor of the state which removed the cover member of FIG. It is a side view which shows the indoor air-conditioning unit and pressure reducer of the state which removed the cover member of FIG. It is a fragmentary sectional view in FIG.

Explanation of symbols

10: Indoor air conditioning unit, 1a, 11b, 13 ... Air conditioning casing,
21, 22 ... Refrigerant piping, 50 ... Car body side partition, 51 ... Opening,
60: Cover member.

Claims (5)

An air conditioning casing (11b, 11c, 13);
An indoor air conditioning unit (10) comprising: a cooling evaporator (80) housed in the air conditioning casing and absorbing heat from the air in the air conditioning casing to evaporate the refrigerant;
A first refrigerant pipe (22) connected to the indoor air conditioning unit side from the vehicle compartment outside area through the pipe through opening (51) of the vehicle body side partition wall (50);
A decompressor (30) that decompresses the refrigerant circulated through the first refrigerant pipe and sends the refrigerant toward the cooling evaporator;
A second refrigerant pipe (21) connected from the cooling evaporator to the vehicle exterior area side through the piping through opening and for sending the refrigerant evaporated by the cooling evaporator to the vehicle exterior area; ,
A cover member (60) disposed between the indoor air conditioning unit and the vehicle body side partition, and formed to cover the entire decompressor and the first and second refrigerant pipes;
The cover structure of a decompressor for a vehicle air conditioner, wherein the cover member is formed independently of the air conditioning casing. An air conditioning casing (11b, 11c, 13);
An indoor air conditioning unit (10) comprising: a cooling evaporator (80) housed in the air conditioning casing and absorbing heat from the air in the air conditioning casing to evaporate the refrigerant;
A first refrigerant pipe (22) connected to the indoor air conditioning unit side from the vehicle compartment outside area through the pipe through opening (51) of the vehicle body side partition wall (50);
A decompressor (30) that decompresses the refrigerant circulated through the first refrigerant pipe and sends the refrigerant toward the cooling evaporator;
A second refrigerant pipe (21) connected from the cooling evaporator to the vehicle exterior area side through the piping through opening and for sending the refrigerant evaporated by the cooling evaporator to the vehicle exterior area; ,
A cover member (60) disposed between the indoor air conditioning unit and the vehicle body side partition and formed to cover the decompressor, the first refrigerant pipe (22), and the second refrigerant pipe (21). ), And
One of the cover member and the air conditioning casing is provided with an engaging portion (61a, 61b) for engaging and fixing the other to the other, and the cover of the decompressor of the vehicle air conditioner Construction. The pressure reduction of the vehicle air conditioner according to claim 1 or 2, wherein a positioning portion (63) is provided in one of the air conditioning casing and the cover member to determine a fixed position of the other. Container cover structure. The air-conditioning casing is provided with protrusions (14a, 14b) formed so as to protrude toward the vehicle body-side partition wall and contact the cover member. The cover structure of the decompressor of the vehicle air conditioner as described in any one. A seal member (70) sandwiched between the cover member and the vehicle body-side partition wall and closely contacting the cover member and the vehicle body-side partition wall;
The cover member is sandwiched and held between the air conditioning casing and the vehicle body side partition wall in a state where the cover member and the vehicle body side partition wall are in close contact with each other by the seal member. Item 5. A cover structure for a decompressor of a vehicle air conditioner according to any one of Items 1 to 4.

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