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WO2018111710A1 - Emballage de réfrigérant variable - Google Patents

Emballage de réfrigérant variable Download PDF

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Publication number
WO2018111710A1
WO2018111710A1 PCT/US2017/065256 US2017065256W WO2018111710A1 WO 2018111710 A1 WO2018111710 A1 WO 2018111710A1 US 2017065256 W US2017065256 W US 2017065256W WO 2018111710 A1 WO2018111710 A1 WO 2018111710A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
ptac
room
evaporator
outside air
Prior art date
Application number
PCT/US2017/065256
Other languages
English (en)
Inventor
Kevin L EICHER
George C CAGLE
Eduardo J GUERRERO
Bascom Clayton COTNER
Original Assignee
Friedrich Air Conditioning, Llc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US15/380,178 external-priority patent/US10436457B2/en
Application filed by Friedrich Air Conditioning, Llc filed Critical Friedrich Air Conditioning, Llc
Priority to MX2019006957A priority Critical patent/MX2019006957A/es
Priority to CA3047085A priority patent/CA3047085A1/fr
Priority to CN201780083974.2A priority patent/CN110214253A/zh
Publication of WO2018111710A1 publication Critical patent/WO2018111710A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1405—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification in which the humidity of the air is exclusively affected by contact with the evaporator of a closed-circuit cooling system or heat pump circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/03—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by mounting arrangements
    • F24F1/031—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by mounting arrangements penetrating a wall or window
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/0328—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air
    • F24F1/035—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air characterised by the mounting or arrangement of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/0358—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with dehumidification means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/04—Air-mixing units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/242—Sound-absorbing material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • a package terminal air conditioner (PTAC) and a vertical packaged air conditioner (VP AC) are types of self-contained heating and air conditioning systems commonly found in hotels or motels. Most PTAC and VP AC units are designed to go through a wall having vents and/or heat sinks both inside and outside. While PTACs and VPACs are commonly used to heat or cool a single living space, there are cooling only PTACs and/or VPACs with an external heating source. On some PTACs/VPACs condensate drain piping is not required because the condensate water extracted from the air by the evaporator coil is thrown by the condenser fan onto the condenser coil surface where it evaporates. Conventional PTACs/VPACs still require condensate drain piping to be installed.
  • Through-the-wall units such as PTACs/VPACs have some basic problems.
  • the through- the-wall units do not ventilate the space in which the air is being conditioned. If provisions are made to ventilate the space being conditioned, then humidity is introduced into the space being conditioned. For example, in coastal areas, motels/hotels have a tendency to have a musty smell due to the humidity. The problem is the unit does not run long enough to remove the moisture from the space being conditioned. Yet, building codes require ventilation of the areas being conditioned which PTAC/VPAC units do not normally provide.
  • the standard air conditioner as it is cooling a particular space only responds to the temperature inside the space. Once the space's temperature is satisfied, the active cooling and dehumidification of the space stops. Humidity in the space continues to build.
  • One solution to address the dehumidification and ventilation that has been used in the hotel/motel industry was to have duct work connecting a source of dehumidified outside air to the enclosed spaced. The dehumidified outside air is forced through the duct work into the room. The increased pressure caused by forcing the dehumidified outside air into the room being conditioned escapes through leakage points such as around the entry door and through the room exhaust.
  • this method requires the running of additional duct work and having a dehumidifier to remove moisture from the outside air.
  • VRF variable refrigerant flow system
  • VRP variable refrigerant package
  • Fig. 1 illustrates a variable refrigerant package fitting inside a closet.
  • Fig. 3 is an exploded pictorial illustration showing how the variable refrigerant package is inserted into a framed (but not enclosed) closet.
  • Fig. 4 is an exploded perspective view of a variable refrigerant package.
  • Fig. 6 is an enlarged partial sectional view of Fig. 5 illustrating how outside air entering the room being conditioned is dehumidified.
  • Figs. 7A and 7B are pictorial block diagrams of controls for a variable refrigerant package.
  • FIGs. 8A and 8B are expanded block diagrams of the motor control system shown in Fig.
  • Fig. 10 is an exploded perspective view of a base for the variable refrigerant package.
  • Fig. 12 is a horizontal cross-sectional view of an alternative embodiment of the present invention.
  • Fig. 13 is a vertical sectional view of the alternative embodiment shown in Fig. 12.
  • a variable refrigerant package 21 is shown in Fig. 1 installed in a closet 23 formed by frame 25 on floor 27 of a space to be cooled.
  • Frame 25 extends to the outside 29 of the space being cooled.
  • the sheetrock or other covering material for the frame 25 has been removed.
  • variable refrigerant package 21 Inside of the closet 23 is installed a base 31 on which the variable refrigerant package 21 sits.
  • a duct adapter 33 is installed near the top of the closet 23 for connection to the top of the variable refrigerant package 21 to direct the conditioned air to a desired location.
  • the variable refrigerant package 21 is inserted into the closet 23 through door opening 35.
  • a plenum 37 is installed that has an interior wall plenum 39 that telescopes inside of exterior wall plenum 41.
  • the lower portion of both the interior wall plenum 39 and exterior wall plenum 41 slopes downward toward the outside 29.
  • a plenum divider baffle 43 is located inside of the interior wall plenum 39 and exterior wall plenum 41.
  • the plenum 37 extends from the outside 29 to the inside of closet 23. Because of the telescoping feature of the plenum 37, varying widths of the outside wall 45 can be accommodated with typical widths being between four to eight inches.
  • An outdoor louvre grill 47 covers the outside opening of plenum 37. The outdoor louvre grill 47 has downwardly sloped louvres 49 to keep rain from entering through plenum 37
  • FIG. 3 the installation of the variable refrigeration package 21 inside of the closet 23 is illustrated.
  • the variable refrigeration package 21 is inserted through the door opening 35.
  • Installation rails 55 are mounted on the bottom of the variable refrigeration package 21 to slide in grooves in the top of base 31 until the variable refrigeration package 21 slides through and presses against the plenum gasket 51 to provide a good seal between the plenum 37 and the variable refrigeration package 21.
  • the bottom of the variable refrigeration package 21 rests on the base gasket 53.
  • duct adapter 33 moves downward to enclose supply duct flanges 57.
  • variable refrigerant package 21 While not shown in Figs. 1 through 3, closet 23 will be wired by the contractor with electricity so the variable refrigerant package may be plugged in for power. Also, a connection (not shown) is provided in closet 23 to the room sensor. By installing the return air door 59 in the door opening 35 of the closet 23 and plugging into power and the room sensor, the variable refrigerant package 21 as shown in Fig. 3 is ready for operation. The installation of the variable refrigerant package 21 can be completed by non-certified personnel.
  • Fig. 4 shows an exploded perspective view of the mechanical parts of the variable refrigerant package 21.
  • the condenser base assembly 61 has a drain tray 63 in the bottom thereof, which rests on base 65. Below base 65 are located the installation rails 55. Compressor 67 rests on the drain tray 63, which is supported by the base 65.
  • corner posts 69 Extending upward from the base 65 are corner posts 69. On the top of corner posts 69 is located the condenser top cover 71. Connected to the underside of the condenser top cover 71 are fresh air modules 73, which will be discussed in more detail subsequently.
  • Control box 75 is located between corner posts 69. Adjacent the control box 75 is control box cover 77. Located below the control box cover 77 is condenser access panel 79.
  • Lower side covers 81 enclose the sides of the condenser base assembly 61.
  • Upper side covers 83 enclose the upper sides of the variable refrigeration package 21. Any return air coming back into the variable refrigerant package 21 has to enter through the return air filter 85.
  • condenser 87 Located within the condenser base assembly 61 are the condenser 87 and the condenser shroud 89.
  • the condenser fan assembly 91 is located within the condenser shroud 89 and blows air through the condenser 87.
  • Condenser drain pan 93 will collect any moisture that drips off of condenser 87 or the evaporator drain pan 103.
  • Located above the compressor 67 is the reversing valve assembly 95.
  • evaporator drain tube 105 Connecting from the evaporator drain pan 103 to the bottom of the variable refrigeration package 21 is evaporator drain tube 105.
  • a blower assembly 107 draws air through blower inlet panel 109. Between the blower inlet panel 109 and the evaporator 101 is located electric heater 111. Allowing access to the electric heater 111 is heater access panel 113.
  • a reheat coil 115 is located behind the evaporator 101.
  • FIG. 5 a pictorial cross-sectional view of the variable refrigerant package 21 is shown.
  • the same numbers as applied to prior component parts described in Figs. 1 through 4 will be used in Fig. 5.
  • the blower assembly 107 brings indoor entering air across the return air filter 85, evaporator coil 101, reheat coil 115 and out blower inlet panel 109 to give indoor leaving air. Any moisture that is collected drains out through evaporator drain tube 105.
  • Outdoor entering air is drawn in through outdoor air inlet 117 by the condenser fan assembly 91 with the majority of the air blowing out through the condenser shroud 89 and through condenser 87 to give outdoor leaving air.
  • the flow of the outdoor air provides cooling for the control box 75 as well as removing heat from condenser 87.
  • the fresh air entering through the fresh air module 73 is cooled and dehumidified by the evaporator 101.
  • the fresh air is mixed with the indoor entering air, cooled and dehumidified with the evaporator 101 with any moisture being collected by evaporator drain panel 103 and discharged out the evaporator drain tube 105.
  • electric heaters 111 may be turned ON to heat the indoor entering air. If humidity needs to be removed from the fresh air, the evaporator 101 is operated just enough to remove the humidity.
  • the reheat coil 115 will provide any reheating necessary due to the operation of the evaporator 101 in removing humidity.
  • Fig. 6 shows an enlarged, cross-sectional view of one of the fresh air modules 73.
  • the fresh air module 73 has an outdoor air fan 123 for drawing air into fresh air chamber 125.
  • the outdoor air fan 123 has a housing, fan blade and motor very similar to a computer-style fan. From the fresh air chamber 125 fresh air flows through outdoor air filter 127. Rectangular openings 121 and honeycomb openings 119 allows some of the outdoor entering air to be mixed with indoor entering air in front of the evaporator coil 101.
  • the mixed air streams of outdoor entering air and indoor entering air are then conditioned to whatever condition the variable refrigerant package 21 is set.
  • the mixed air can be cooled, dehumidified or heated.
  • the present invention brings fresh air into the space being conditioned and by a sophisticated control system that coordinates the motors and compressor allows the variable refrigerant package 21 to run longer so that it will cause more dehumidification of the air. As the space being conditioned gets closer and closer to the desired temperature, the motors and compressor are slowed down so that the unit will run longer to dehumidify the space being conditioned.
  • variable refrigerant package 21 varies its ability to cool the enclosed space by two distinct methods.
  • the variable refrigerant package 21 reduces its capacity or ability to cool by varying the speeds of the motors or compressor as the conditioned space approaches the desired temperature.
  • the second method is to add some reheat back to the space being cooled as is provided by the re-heater coil 115.
  • the evaporator 101 is allowed to continue to run and remove moisture from the air, but heat is then added back through re-heater coil 115.
  • the conditioned space is being actively dehumidified.
  • the electrical controls for the variable refrigerant package 21 are illustrated in Fig. 7.
  • a wall controller 129 commonly called a thermostat, sets the desired temperature inside of enclosed space.
  • the wall controller 129 may be communicated with through an external communications module 131. Also, setting up the operating parameters of the variable refrigerant package 21 may be done with SD card 133.
  • the wall controller 129 communicates with the main controller 135.
  • the main controller 135 has a wall controller communications 137 for communicating with the wall controller 129.
  • the main controller 135 has a processor 136 in which provisional data may be programmed by data switches 138.
  • the main controller 135 communicates with motor control system 139 via MCS communication 141. Also, main controller 135 communicates with heater board 143 via heater communication 145.
  • the main controller 135 could be referred to as the master unit with the motor control system 139 and/or the heater board 143 being referred to as slave units.
  • Both the motor control system 139 and the heater board 143 receive commands from the processor 136 in the main controller 135. If a problem is detected in either the motor control system 139 or the heater board 143, the message is communicated back through the main controller 135 and is displayed on the wall controller 129.
  • the wall controller 129 may receive commands or send commands back and forth with the main controller 135, plus having an external communications module 131.
  • the main controller 135 has a USB interface 147 for communicating with a personal computer 149.
  • the personal computer 149 may be programmed to set data points in the main controller 135, retrieve data, send commands, or remotely control the entire variable refrigerant package 21. Also, the personal computer 149 may be used to do monitor control tests to make sure the variable refrigerant package 21 is operating properly. Any error history in the main controller 135 may be downloaded and observed in the personal computer 149.
  • the personal computer 149 may be used for troubleshooting or upgrading software in the main controller 135. The parameters set in the main controller 135 can be changed through the personal computer 149.
  • processor 151 controls fan driver 153 that operates the indoor fan 155. By providing pulse width modulation to the indoor fan 155, the speed of the indoor fan 155 and its power consumption is controlled. Also, processor 151 controls the fan driver 157 for the outdoor fan 159.
  • the indoor fan 155 is the same as blower assembly 107 shown in Figs. 4 and 5.
  • Outdoor fan 159 is the same as condenser fan assembly 91 shown in Figs. 4 and 5.
  • Processor 161 inside of motor control system 139 operates a compressor driver 163 that in turn operates the compressor 67.
  • the speed of the compressor 67 may be varied.
  • an SD socket 171 is provided to receive SD card 173.
  • the SD card 173 may be used to upgrade the program or firmware inside of the main controller 135. Also, the SD card 173 may be used for troubleshooting or downloading the history of the operation of the variable refrigerant package 21.
  • the SD card 173 can also provide extra memory for the main controller 135.
  • the main controller 135 also controls a stepper driver 177 that operates electronic expansion valve 179.
  • the electronic expansion valve 179 controls the flow of the refrigerant inside the system. The operation of the electronic expansion valve 179 is controlled by the temperature entering the evaporator 101 and the temperature entering the compressor 67 (see Fig. 5). The electronic expansion valve 179 is opened or closed to maintain a certain temperature range between the evaporator inlet and the compressor inlet. The electronic expansion valve 179 acts like a modulating valve.
  • the heater board 143 energizes and de-energizes the reversing valve 185. Assuming the variable refrigerant package 21 has been in the cooling mode and is switched to the heating mode, the main controller 135 will cause the heater board 143 to switch the reversing valve 185. Communication between the main controller 135 and the heater board 143 is provided by heater communication 145 with the microcontroller 187. From the microcontroller 187, a signal is sent to the reversing valve triac 189 to switch the reversing valve relay 191.
  • a microcontroller 187 that could be used is a Freescale KL02.
  • the microcontroller 187 Since the microcontroller 187 provides pulse width modulation, the zero cross-detector 193 lets the microcontroller 187 know when the alternating current provided in power input lines 165 crosses the zero axis. If heat is being called for, the microcontroller 187 will operate heater relay drivers 194 to switch heater relays 195 and/or 197, which controls heaters 199 and 201, respectively.
  • a heater silicon controlled rectifier 203 completes the circuit for heaters 199 and/or 201 and is operated by microcontroller 187.
  • a 3.3 volt regulator 192 is provided internally in a heater board 143.
  • Fig. 8 is a more in-depth review of the motor control system 139.
  • the power input lines 165 connect from an alternating current source 211, which may vary from 180 to 293 volts AC, into the motor control system 139.
  • the alternating current source 211 feeds through an EMI filter 213 prior to connecting to 2-phase interleaved active power factor correction 215.
  • the 2-phased interleaved active power factor correction 215 has a current sensor 217 and a voltage sensor 219. With the current sensor 217 and voltage sensor 219, the power being consumed can continually be determined.
  • a 430 volt DC bus 221 is generated.
  • an isolated auxiliary power supply 223 generates +12 volts DC at 2.5 amps.
  • processor 161 Inside of motor control system 139 is processor 161 as previously explained in connection with Fig. 7. Processor 161 controls the compressor motor 67 through compressor driver 163. The 430 volt DC bus 221 supplies DC voltage to the compressor driver 163.
  • Processor 151 controls outdoor fan motor 159 through outdoor fan driver 157 and indoor fan motor 155 through indoor fan driver 153.
  • the processor 151 provides pulse width modulated power via outdoor fan driver 157 to outdoor fan motor 159.
  • processor 151 provides pulse width modulated power to indoor fan 155 via indoor fan driver 153.
  • the signal being delivered to the compressor motor 67 through the compressor driver 163 from the processor 161 senses the rotor position inside the compressor 67.
  • the signal being received from the 430 volt DC bus 221 is chopped and converted into a simulated three-phase AC signal to make the motor axis of the compressor 67 spin at the desired rate.
  • the outdoor fan driver 157 for the outdoor fan motor 159 is doing essentially the same thing by taking the signal from the 430 volt DC bus 221, chopping it and providing a simulated three-phase AC current to the outdoor fan motor 159.
  • the indoor fan driver 153 does essentially the same thing for the indoor fan motor 155. While the compressor driver 163 is being controlled by processor 161, outdoor fan driver 157 and indoor fan driver 153 are being controlled by processor 151.
  • a bias power supply 225 receives voltage from 430 volts DC bus 221 and generates +15 volts DC and +3.3 volts DC, which is used to supply power to any part of the variable refrigerant package 21 that may need those voltage levels.
  • the +3.3 volt DC is used to operate processors 161 and processor 151.
  • multiplexer 227 has an isolated RS-485 duplexer 229 for connection to an external device.
  • the external device may be similar to the personal computer 149 shown in Fig. 7.
  • the isolated RS-485 duplexer 229 allows for external connections and controls to the motor control system 139.
  • the motor control system 139 has an isolated serial peripheral interface 231 that may connect to a micro SD card 175.
  • the SD card 175 may be used to update the motor control system 139, check error messages and exchange information therewith.
  • the motor control system 139 is where all of the power conversion is done. This is where the drivers 163, 157 and 153 are all located. This is where regulated power is generated from a highly unregulated source.
  • variable refrigerant package 21 When the variable refrigerant package 21 is turned OFF so the alternating current source 211 no longer connects through the EMI filter 213 to the 2-phase interleaved active power factor correction 215, inductive or capacitive charges may still remain in the circuit.
  • a bleeder circuit 220 is provided through which the inductive and/or capacitive charges may drain down. The LED 222 will remain lit until the bleeder circuit 220 has fallen below a predetermined current.
  • Fig. 9 a schematic view is shown of the 2-phase interleaved active power factor correction 215.
  • the alternating current source 211 feeds through the EMI filter 213 to the 2-phase interleaved active power factor correction 215.
  • the alternating current is changed by a full wave rectifier 301 to a rectified AC signal.
  • the rectified AC signal from the full wave rectifier 301 feeds through inductors 303 and 305.
  • the inductors 303 and 305 are connected to current sensors 307 and 309, respectively.
  • Each current sensor 307 and 309 connects to MOSFETs 311 and 313, respectively.
  • Diodes 335, 337 and 339 insure that current only flows in one direction to capacitor 341.
  • the controller 325 monitors the input voltage 333, feedback voltage 323, along with current sense 327 and 329 to decide if the power factor needs to be corrected.
  • the controller 325 controls the point at which each of the MOSFETs 311 and/or 313 are fired to get the maximum power factor.
  • the maximum power factor is when the current and the voltage are in phase with each other.
  • An example of such a controller 325 that can control the firing of MOSFETs 311 and 313 is a Texas Instrument, Part No. UCC-2807.
  • a drain basin 263 is provided in the internal trough 265 provided inside of raised rib seat 267.
  • One end of the internal trough 165 provides outdoor drain access 269. Sealing the top of the raised rim seat 267 to the underside of the variable refrigerant package 21 is chassis seal 271.
  • the outdoor drain access 269 extends over the inside edge of the plenum 37 so that any accumulated moisture will drain outside the building. Thereafter, if service personnel sees the drainage flowing through the plenum 37 to outside the building, the service personnel will know that the drain system for that particular room is clogged and needs to be cleaned. However, no damage will have been caused inside the room.
  • a notch 295 is provided in the raised rib seat 267. This notch 295 allows the lower end of the evaporator drain tube 105 to move there through when being installed until the lower end of the evaporator drain tube 105 is just above the drain basin 263. After installation of the variable refrigerant package 21 a piece of foam may be placed inside of notch 295.
  • PTACs package terminal air conditioners
  • the fresh air is mixed with indoor entering air and drawn through the evaporator 410 by the blower 418.
  • the mixed fresh air and indoor entering air combine to give indoor leaving air.
  • a fresh air filter 420 to remove any particles that may be in the fresh air.
  • the inside of the snorkel 416 is lined with sound-deadening material to keep sound outside of a hotel/motel room from reaching the inside of the hotel/motel room.
  • the volume of the fresh air flowing through the snorkel 416 in the PTAC unit 400 is approximately 5% to 10% of the outdoor entering air, which is approximately 30 to 50 cubic feet per minute (CFM).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)
  • Central Air Conditioning (AREA)

Abstract

La présente invention concerne un appareil de climatisation à emballage de réfrigérant variable, facile à installer dans une nouvelle construction et comprenant une base unique qui permet de drainer à l'extérieur du bâtiment le mélange débordant recueilli. Selon l'invention, un système de commande comprend des moteurs et un compresseur qui sont modulés en largeur d'impulsions de manière telle que l'appareil de climatisation soit infiniment variable tout en conservant le facteur de puissance le plus élevé possible. La déshumidification de l'air extérieur se produit lors de son mélage avec l'air intérieur. L'approche progressive d'une température de consigne et la chauffe uniforme après déshumidification, permettent d'éliminer l'humidité. L'invention concerne également un tuba qui délivre de l'air frais à mélanger avec l'air entrant à l'intérieur en face de l'évaporateur pour une déshumidification maximale.
PCT/US2017/065256 2016-12-15 2017-12-08 Emballage de réfrigérant variable WO2018111710A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
MX2019006957A MX2019006957A (es) 2016-12-15 2017-12-08 Paquete de refrigerante variable.
CA3047085A CA3047085A1 (fr) 2016-12-15 2017-12-08 Emballage de refrigerant variable
CN201780083974.2A CN110214253A (zh) 2016-12-15 2017-12-08 可变制冷剂柜

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15/380,178 2016-12-15
US15/380,178 US10436457B2 (en) 2015-12-18 2016-12-15 Variable refrigerant package

Publications (1)

Publication Number Publication Date
WO2018111710A1 true WO2018111710A1 (fr) 2018-06-21

Family

ID=62559789

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PCT/US2017/065256 WO2018111710A1 (fr) 2016-12-15 2017-12-08 Emballage de réfrigérant variable

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CN (1) CN110214253A (fr)
CA (1) CA3047085A1 (fr)
MX (1) MX2019006957A (fr)
WO (1) WO2018111710A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11226115B2 (en) * 2019-08-28 2022-01-18 Haier Us Appliance Solutions, Inc. Air conditioning appliance and telescoping air plenum with face seal
US11624515B2 (en) * 2019-12-31 2023-04-11 Gd Midea Air-Conditioning Equipment Co., Ltd. Chassis for window air conditioner, chassis assembly, and window air conditioner

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3018642A (en) * 1960-05-09 1962-01-30 American Air Filter Co Air conditioner
US3113634A (en) * 1958-07-11 1963-12-10 Bolt Beranek & Newman Sound absorbing panel for lining a duct
US4524588A (en) * 1983-11-21 1985-06-25 Amana Refrigeration, Inc. Air conditioner with improved fresh air path
US5295531A (en) * 1991-09-02 1994-03-22 Sanyo Electric Co., Ltd. Air conditioner with outside air introduction path
US5924300A (en) * 1998-06-10 1999-07-20 American Standard Inc. Modular self contained air conditioning unit
US20080156891A1 (en) * 2007-01-03 2008-07-03 American Standard International Inc PTAC dehumidification without reheat and without a humidistat
US20080250800A1 (en) * 2007-04-13 2008-10-16 Air Innovations, Inc. Total room air purification system with air conditioning, filtration and ventilation

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113634A (en) * 1958-07-11 1963-12-10 Bolt Beranek & Newman Sound absorbing panel for lining a duct
US3018642A (en) * 1960-05-09 1962-01-30 American Air Filter Co Air conditioner
US4524588A (en) * 1983-11-21 1985-06-25 Amana Refrigeration, Inc. Air conditioner with improved fresh air path
US5295531A (en) * 1991-09-02 1994-03-22 Sanyo Electric Co., Ltd. Air conditioner with outside air introduction path
US5924300A (en) * 1998-06-10 1999-07-20 American Standard Inc. Modular self contained air conditioning unit
US20080156891A1 (en) * 2007-01-03 2008-07-03 American Standard International Inc PTAC dehumidification without reheat and without a humidistat
US20080250800A1 (en) * 2007-04-13 2008-10-16 Air Innovations, Inc. Total room air purification system with air conditioning, filtration and ventilation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11226115B2 (en) * 2019-08-28 2022-01-18 Haier Us Appliance Solutions, Inc. Air conditioning appliance and telescoping air plenum with face seal
US11624515B2 (en) * 2019-12-31 2023-04-11 Gd Midea Air-Conditioning Equipment Co., Ltd. Chassis for window air conditioner, chassis assembly, and window air conditioner

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CA3047085A1 (fr) 2018-06-21
CN110214253A (zh) 2019-09-06
MX2019006957A (es) 2019-10-15

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