US20070277549A1 - Automotive air-conditioning system - Google Patents

Automotive air-conditioning system Download PDF

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Publication number
US20070277549A1
US20070277549A1 US11/810,296 US81029607A US2007277549A1 US 20070277549 A1 US20070277549 A1 US 20070277549A1 US 81029607 A US81029607 A US 81029607A US 2007277549 A1 US2007277549 A1 US 2007277549A1
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United States
Prior art keywords
conditioning system
connecting portion
automotive air
gas
liquid separator
Prior art date
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Abandoned
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US11/810,296
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English (en)
Inventor
Masato Tsuboi
Kenichi Suzuki
Yuuichi Matsumoto
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Sanden Corp
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Sanden Corp
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Publication date
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Assigned to SANDEN CORPORATION reassignment SANDEN CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MATSUMOTO, YUUICHI, SUZUKI, KENICHI, TSUBOI, MASATO
Publication of US20070277549A1 publication Critical patent/US20070277549A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3229—Cooling devices using compression characterised by constructional features, e.g. housings, mountings, conversion systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
    • B60H1/00557—Details of ducts or cables
    • B60H1/00571—Details of ducts or cables of liquid ducts, e.g. for coolant liquids or refrigerants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/18—Optimization, e.g. high integration of refrigeration components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide

Definitions

  • the present invention relates to an automotive air-conditioning system.
  • a refrigeration circuit of an automotive air-conditioning system has a circulation path through which a refrigerant circulates.
  • the circulation path includes a first flow channel extending within an engine room and a second flow channel extending within a vehicle interior.
  • the first and second flow channels are circularly connected to each other near a partition wall that separates the engine room from the vehicle interior.
  • a compressor In general, a compressor, a radiator (condenser or gas cooler), a pressure reducer (expansion valve) and an evaporator are interposed in the circulation path in the order named in the flowing direction of the refrigerant.
  • a gas-liquid separator for separating a gas-phase component and a liquid-phase component contained in the refrigerant is also interposed in the circulation path.
  • the gas-liquid separator is placed downstream of the radiator or of the evaporator.
  • Refrigerants of this type include natural CO 2 (carbon dioxide) as an example.
  • CO 2 is not condensed by the radiator, so that the gas-liquid separator is disposed downstream from the evaporator.
  • an internal heat exchanger is interposed in the circulation path as seen in the refrigeration circuit using CO 2 which is disclosed in Unexamined Japanese Patent Publication No. 2001-56188.
  • a conventional automotive air-conditioning system has a compressor, a radiator, a pressure reducer, an evaporator and a gas-liquid separator as primary devices composing the refrigeration circuit, and also includes, as parts for connecting between the inlets and outlets of the primary devices, pipes extending between the primary devices and connecting members for connecting between these devices and the pipes.
  • the automotive air-conditioning system has a gas-liquid separator, a compressor and a radiator.
  • the gas-liquid separator, the compressor and the radiator are interposed in a first flow channel of a refrigerant which extends within an engine room in the order named in a flowing direction of the refrigerant.
  • the automotive air-conditioning system also includes a pressure reducer and an evaporator. The pressure reducer and the evaporator are interposed in a second flow channel of the refrigerant which extends within a vehicle interior in the order named in the flowing direction of the refrigerant.
  • the automotive air-conditioning system also has a connecting device disposed near a partition wall that separates the engine room from the vehicle interior.
  • the connecting device circularly connects the first and second flow channels to each other.
  • the connecting device includes a first connecting portion that is formed at a downstream end of the second flow channel and a second connecting portion that is formed at an inlet of the gas-liquid separator and is connected to the first connecting portion.
  • the first connecting portion that is formed at the downstream end of the second flow channel and the second connecting portion that is formed in the gas-liquid separator are connected to each other. This eliminates the need for a pipe for connecting between the first connecting portion and the gas-liquid separator and a connecting member attached to the pipe, and then reduces the number of parts.
  • the automotive air-conditioning system is easy to install in the vehicle and is low in price.
  • the automotive air-conditioning system further has an internal heat exchanger that is interposed in the first flow channel.
  • the internal heat exchanger includes a high-temperature portion that is interposed in a high-pressure area of the first flow channel which extends between the radiator and the pressure reducer, a low-temperature portion that is interposed in a low-pressure area of the first flow channel which extends between the gas-liquid separator and the compressor, and receives heat from the high-temperature portion, and a third connecting portion that is formed at an inlet of the low-temperature portion.
  • the gas-liquid separator includes a fourth connecting portion that is formed at an outlet of the gas-liquid separator and is connected to the third connecting portion.
  • the third connecting portion of the internal heat exchanger and the fourth connecting portion of the gas-liquid separator are connected to each other. This eliminates the need for a pipe for connecting between the low-temperature portion of the internal heat exchanger and the gas-liquid separator and a connecting member attached to the pipe. Therefore, the number of parts is further reduced. This makes it easier to install the automotive air-conditioning system in the vehicle and allows for a low price of the system.
  • the internal heat exchanger includes a fifth connecting portion that is formed at the outlet of the high-temperature portion.
  • the connecting device includes a sixth connecting portion that is formed at an upstream end of the second flow channel and a bridge portion that is formed integrally with both the second and fourth connecting portions of the gas-liquid separator.
  • the bridge portion is connected to both the fifth and sixth connecting portions and has an internal flow channel that communicates between the outlet of the high-temperature portion and the upstream end of the second flow channel.
  • the sixth connecting portion of the connecting device and the fifth connecting portion of the internal heat exchanger are connected to the bridge portion of the gas-liquid separator. This eliminates the need for a pipe for connecting between the sixth connecting portion of the connecting device and the high-temperature portion of the internal heat exchanger and a connecting member attached to the pipe. Therefore, the number of parts is further reduced. This makes it easier to install the automotive air-conditioning system in the vehicle and allows a low price of the system.
  • the automotive air-conditioning system has a supporting device for supporting the gas-liquid separator by using the partition wall.
  • the gas-liquid separator is installed in the vehicle with less difficulty as compared to the case in which the gas-liquid separator is supported by another portion of the vehicle. This makes it easier to install the automotive air-conditioning system in the vehicle.
  • the supporting device includes a bracket for holding the gas-liquid separator and an engaging member that is interposed between the bracket and the partition wall and engages the bracket with the partition wall.
  • the gas-liquid separator is more easily installed in the vehicle by using the partition wall to support the gas-liquid separator with the bracket and the engaging member intervening therebetween.
  • the supporting device further includes a buffering member having thermal insulating properties and elasticity, which is interposed between the bracket and the partition wall.
  • the supporting device further includes the buffering member having the thermal insulating properties and the elasticity, the heat, vibrations and noises in the engine room are prevented from being transmitted to the vehicle interior. Consequently, the comfort of vehicle occupants is maintained in the vehicle to which the above-described automotive air-conditioning system is applied.
  • the first and second connecting portions of the connecting device, the fourth connecting portion of the gas-liquid separator and the third connecting portion of the internal heat exchanger are arranged in one straight line
  • the sixth connecting portion of the connecting device, the bridge portion and the fifth connecting portion of the internal heat exchanger are arranged in another straight line parallel to the one straight line.
  • the first and second connecting portions of the connecting device, the third connecting portion of the internal heat exchanger and the fourth connecting portion of the gas-liquid separator are arranged in the one straight line
  • the sixth connecting portion of the connecting device, the bridge portion and the fifth connecting portion of the internal heat exchanger are arranged in the another straight line parallel to the one straight line. It is then possible to connect between the first to sixth connecting portions and the bridge portion in one connection direction without difficulty. This makes it easier to install the automotive air-conditioning system in the vehicle.
  • the first and sixth connecting portions of the connecting device are integrally formed.
  • the third and fifth connecting portions of the internal heat exchanger are integrally formed.
  • the connecting device includes a single bolt that couples the first connecting portion with the second connecting portion, the bridge portion with the fifth and sixth connecting portions, and the third connecting portion with the fourth connecting portion.
  • the first and sixth connecting portions of the connecting device are integrally formed, and the third and fifth connecting portions of the internal heat exchanger are integrally formed.
  • the first connecting portion is coupled with the second connecting portion, the bridge portion with the fifth and sixth connecting portions, and the third connecting portion with the fourth connecting portion with the single bolt.
  • the refrigerant is CO 2 .
  • the preferable automotive air-conditioning system uses CO 2 as refrigerant, it is environmentally friendly.
  • the automotive air-conditioning system separates the liquid-phase component contained in the refrigerant by using the gas-liquid separator, so that liquid compression in the compressor is prevented, and the durability of the system is secured.
  • FIG. 1 is a schematic configuration view of a refrigeration circuit of an automotive air-conditioning system according to one embodiment of the present invention
  • FIG. 2 is a top view showing partly in section a connecting structure between first and second flow channels in a circulation path of the refrigeration circuit of FIG. 1 ;
  • FIG. 3 is a sectional view, taken along line III-III in FIG. 2 ;
  • FIG. 4 is a perspective exploded view of the connecting structure shown in FIG. 2 .
  • FIG. 1 schematically shows a refrigeration circuit of an automotive air-conditioning system according to one embodiment.
  • the refrigeration circuit is of a vapor compression type and is used for refrigerating or dehumidifying an air flow that is introduced into a vehicle interior 2 .
  • the refrigeration circuit has a circulation path 4 .
  • CO 2 refrigerant (R-744) that is a natural refrigerant circulates through the circulation path 4 while containing a small amount of lubricating oil serving as refrigerating machine oil.
  • the circulation path 4 extends from an engine room 6 through a partition wall 8 to a front portion of the vehicle interior 2 .
  • the front part of the vehicle interior 2 is partitioned by an installment panel 10 and serves as an equipment space 12 .
  • a compressor 14 there are interposed a compressor 14 , a radiator (gas cooler) 16 , a high-temperature portion 18 a of an internal heat exchanger 18 , a pressure reducer (expansion valve) 20 , an evaporator 22 , a gas-liquid separator (liquid receiver) 24 , and a low-temperature portion 18 b of the internal heat exchanger 18 in the order named in a flowing direction of the refrigerant.
  • the compressor 14 that has been supplied with motive power from the engine sucks a low-temperature and pressure gas-phase refrigerant from the low-temperature portion 18 b of the internal heat exchanger 18 .
  • the compressor 14 compresses the sucked refrigerant to bring it into a high-temperature and pressure state, and then discharges the refrigerant toward the radiator 16 .
  • the compressor 14 carries out the steps of sucking, compressing and discharging the refrigerant.
  • the refrigerant is circulated through the circulation path 4 , passing through the radiator 16 , the high-temperature portion 18 a of the internal heat exchanger 18 , the pressure reducer 20 , the evaporator 22 , the gas-liquid separator 24 , and the low-temperature portion 18 b of the internal heat exchanger 18 in order.
  • the refrigerant When passing through the radiator 16 , the refrigerant is air-cooled and is decreased in temperature. Subsequently when passing through the high-temperature portion 18 a of the internal heat exchanger 18 , the refrigerant is cooled by exchanging heat with a refrigerant passing through the low-temperature portion 18 b of the internal heat exchanger 18 , and is further decreased in temperature.
  • the high-pressure supercritical or liquid-phase refrigerant thus reduced in temperature is expanded and decreased in pressure and temperature when passing through the pressure reducer 20 , and turns into a low-temperature and pressure refrigerant in a gas-liquid mixture (two-phase) state.
  • the liquid-phase component contained therein evaporates while absorbing the heat of vaporization from an ambient gas.
  • an air flow running outside the evaporator 22 turns into cold air.
  • the cold air flows into the vehicle interior 2 , thereby air-conditioning or dehumidifying the vehicle interior 2 .
  • the circulation path 4 is roughly divided into a first flow channel 30 extending within the engine room and a second flow channel 32 extending within the equipment space 12 .
  • the first and second flow channels 30 and 32 are connected to each other near the partition wall 8 so as to form the annular circulation path 4 .
  • a connecting structure of the first and second flow channels 30 and 32 will be described below with reference to FIGS. 2 to 4 .
  • the gas-liquid separator 24 has a tubular body 34 .
  • the tubular body 34 has a shape of a circular cylinder with a bottom and an open upper end.
  • a disc-like cover plate 36 is placed at the open end of the tubular body 34 , and an outer circumference of the cover plate 36 is airtightly connected to the tubular body 34 .
  • a lower surface of a block 38 in a shape of a rectangular parallelepiped is brought into airtight contact with an upper surface of the cover plate 36 .
  • the block 38 has a pair of faces (contacted surfaces) 40 and 41 that extend parallel to the partition wall 8 .
  • a supply path 42 for supplying the refrigerant to the tubular body 34 and a discharge path 43 for discharging the refrigerant from the tubular body 34 .
  • the supply path 42 extends in the shape of letter L and has a horizontal portion 44 and a vertical portion 46 .
  • the discharge path 43 also extends in the shape of letter L and has a horizontal portion 45 and a vertical portion 47 .
  • the horizontal portions 44 and 45 extend along the same axis perpendicular to the partition wall 8 .
  • An outer end of the horizontal portion 44 of the supply path 42 opens in the contacted surface 40 located on the side of the partition wall 8 .
  • An outer end of the horizontal portion 45 of the discharge path 43 opens in the contacted surface 41 located opposite to the partition wall 8 .
  • the cover plate 36 is pierced by a straight supply pipe 50 and a J-shaped discharge pipe 51 in an airtight manner. Upper ends of the supply pipe 50 and the discharge pipe 51 are connected to lower ends of the vertical portions 46 and 47 of the supply path 42 and the discharge path 43 , respectively.
  • the horizontal hole 54 runs through the block 38 , extending parallel to the horizontal portions 44 and 45 of the supply path 42 and the discharge path 43 . Accordingly, both ends of the horizontal hole 54 open in the contacted surfaces 40 and 41 , respectively.
  • a first flange 56 is connected to the block 38 from the partition wall 8 side.
  • the first flange 56 is formed, for example, into a rectangular parallelepiped, and has a contact surface 58 in surface contact with the contacted surface 40 of the block 38 and a back surface 60 located opposite to the contact surface 58 .
  • first flange 56 there are formed two through holes 62 and 64 parallel to each other. Both ends of the through holes 62 and 64 open in the contact surface 58 and the back surface 60 , respectively. The open ends of the through holes 64 and 62 in the contact surface 58 are positioned to coincide with the open ends of the horizontal portion 44 and the horizontal hole 54 in the contacted surface 40 , respectively.
  • the through hole 62 leads to the horizontal hole 54 , and the through hole 64 to the supply path 42 .
  • tubular portions 66 and 68 are protruding from open edges of the through holes 62 and 64 .
  • the tubular portions 66 and 68 are inserted into the horizontal hole 54 and the horizontal portion 44 , respectively.
  • Gaskets 70 and 71 are fitted in a gap between a tip end of the tubular portion 66 and an inner surface of the horizontal hole 54 and a gap between a tip end of the tubular portion 68 and an inner surface of the horizontal portion 44 , respectively.
  • one ends of pipes 72 and 73 are connected to the open ends of the through holes 62 and 64 , respectively.
  • the other end of the pipe 73 is coupled to an outlet of the evaporator 22 .
  • the other end of the pipe 72 is coupled to an inlet of the pressure reducer 20 .
  • An outlet of the pressure reducer 20 and an inlet of the evaporator 22 are connected to each other through a pipe 74 .
  • the first flange 56 runs through a piping hole 76 formed in the partition wall 8 . Disposed in between an outer circumferential surface of the first flange 56 and an inner circumferential surface of the piping hole 76 is, for example, a rubber diaphragm 78 .
  • the first flange 56 is fastened to the block 38 , for example, with a single connecting bolt 80 that is a tap bolt.
  • An insertion hole in which a shaft of the connecting bolt 80 is inserted is formed in the block 38 parallel to the horizontal hole 54 .
  • a thread portion formed at a tip end of the connecting bolt 80 is screwed into a screw hole that opens in the contact surface 58 of the first flange 56 .
  • first and second flow channels 30 and 32 of the circulation path 4 are connected to each other near the partition wall 8 by fastening the first flange 56 to the block 38 .
  • the high-temperature portion 18 a and the low-temperature portion 18 b of the internal heat exchanger 18 are formed of pipes (heat exchange pipes) arranged to contact each other. Both ends of the high-temperature portion 18 a and those of the low-temperature portion 18 b are connected to a second flange 82 and a third flange 84 , respectively.
  • the second flange 82 has a configuration that is virtually identical to that of the first flange 56 . Parts of the second flange 82 which are identical to those of the first flange 56 will be provided with the same reference marks, and descriptions thereof will be omitted.
  • the second flange 82 differs from the first flange 56 in that, instead of a screw hole, an insertion hole penetrated by a connecting bolt 80 is formed.
  • the outlet of the high-temperature portion 18 a and the inlet of the low-temperature portion 18 b are connected to open ends of through holes 62 and 64 , respectively. Accordingly, the through hole 62 leads to the outlet of the high-temperature portion 18 a , and the through hole 64 of the second flange 82 to the low-temperature portion 18 b.
  • a contact surface 58 of the second flange 82 is in surface contact with the contacted surface 41 of the block 38 .
  • the open ends of the through holes 62 and 64 in the contact surface 58 of the second flange 82 are positioned to coincide with the open ends of the horizontal hole 54 and the horizontal portion 45 in the contacted surface 41 , respectively.
  • the through hole 62 of the second flange 82 leads to the horizontal hole 54 , and the through hole 64 of the second flange 82 to the discharge path 43 .
  • Airtightness between the through hole 62 and the horizontal hole 54 and that between the through hole 64 and the discharge path 43 are secured by gaskets 70 and 71 , respectively, which are fitted in a gap between a tip end of a tubular portion 66 of the second flange 82 and the inner surface of the horizontal hole 54 and a gap between a tip end of a tubular portion 68 of the second flange 82 and an inner surface of the horizontal portion 45 of the discharge path 43 .
  • a third flange 84 also has a configuration that is virtually identical to that of the first flange 56 .
  • the inlet of the high-temperature portion 18 a and the outlet of the low-temperature portion 18 b are connected to a back surface 60 of the third flange 84 .
  • the block 38 of the gas-liquid separator 24 , the first flange 56 , and the second flange 82 are arranged on the same axis perpendicular to the partition wall 8 .
  • the block 38 is sandwiched between the first and second flanges 56 and 82 . Therefore, the gas-liquid separator 24 is located near the partition wall 8 and is supported by the partition wall 8 .
  • the tubular body 34 of the gas-liquid separator 24 is placed on a bottom wall 88 of an L-shaped bracket 86 .
  • a lateral wall 90 of the bracket 86 which is vertically set, is located between the tubular body 34 and the partition wall 8 and in line contact with an outer circumferential surface of the tubular body 34 .
  • Both ends of a metal band 92 are fixed in the virtual center of the lateral wall 90 as viewed in a vertical direction.
  • the band 92 is curved along the outer circumference of the tubular body 34 .
  • the bracket 86 holds the gas-liquid separator 24 in consort with the band 92 .
  • the lateral wall 90 of the bracket 86 is located away from the partition wall 8 .
  • Each of the pins 96 is fitted with a buffering member 98 .
  • the buffering member 98 is, for example, made of rubber and has thermal insulating properties and elasticity.
  • the buffering member 98 has a tubular portion sandwiched between an outer circumferential surface of the corresponding pin 96 and an inner circumferential surface of the corresponding pin hole 94 , and a stopper portion sandwiched between the lateral wall 90 of the bracket 86 and the partition wall 8 .
  • the first flange 56 formed at a downstream end of the second flow channel 32 and the block 38 formed in the gas-liquid separator 24 are connected to each other. This eliminates the need for a pipe for connecting between the first flange 56 and the gas-liquid separator 24 and a connecting member attached to the pipe, thereby reducing the number of parts. Consequently, the automotive air-conditioning system is easy to install in the vehicle and is low in price.
  • the second flange 82 of the internal heat exchanger 18 and the block 38 of the gas-liquid separator 24 are connected to each other. This eliminates the need for a pipe for connecting between the low-temperature portion 18 b of the internal heat exchanger 18 and the gas-liquid separator 24 and a connecting member attached to the pipe, thereby further reducing the number of parts. This makes it easier to install the automotive air-conditioning system in the vehicle and allows for a low price of the system.
  • the first and second flanges 56 and 82 are connected to the block 38 of the gas-liquid separator 24 , and the high-temperature portion 18 a of the internal heat exchanger 18 and the pressure reducer 20 are communicated with each other through the horizontal hole 54 of the block 38 .
  • the gas-liquid separator 24 is supported by the partition wall 8 in the automotive air-conditioning system, the gas-liquid separator 24 is easy to install in the vehicle, as compared to the case in which the gas-liquid separator 24 is supported by another portion of the vehicle. Therefore, the automotive air-conditioning system is more easily installed in the vehicle.
  • the gas-liquid separator 24 is supported by the partition wall 8 through the bracket 86 , the pin holes 94 formed in the bracket 86 , and the pins 96 fitted in the pin holes 94 as a supporting device, the gas-liquid separator 24 is more easily installed in the vehicle.
  • the supporting device of the gas-liquid separator 24 further includes the buffering member 98 with the thermal insulating properties and the elasticity, it is possible to prevent the heat, vibration and noises in the engine room 6 from being transmitted to the vehicle interior 2 . For that reason, the comfort of vehicle occupants is maintained in the vehicle to which the above-described automotive air-conditioning system is applied.
  • the block 38 and the first and second flanges 56 and 82 are arranged in series.
  • the block 38 and the first and second flanges 56 and 82 are therefore connected to each other in one connection direction without difficulty.
  • the automotive air-conditioning system is more easily installed in the vehicle.
  • the automotive air-conditioning system uses CO 2 as refrigerant, and it is then environmentally friendly. Moreover, in the automotive air-conditioning system, the gas-liquid separator 24 separates a liquid-phase component contained in the refrigerant, so that liquid compression in the compressor 14 is prevented from taking place, and the durability of the system is maintained.
  • cover plate 36 of the gas-liquid separator 24 and the block 38 are independent from each other, they may be formed integral with each other.
  • the high-temperature portion 18 a and the low-temperature portion 18 b of the internal heat exchanger 18 are formed of the pipes (heat exchange pipes) arranged to contact each other.
  • a pipe of a double-pipe structure type may be utilized as an internal heat exchanger.
  • the supply path 42 , the discharge path 43 and the horizontal hole 54 are formed in the single block 38 .
  • a plurality of blocks may be disposed on the cover plate 36 instead.
  • the horizontal hole 54 , the supply path 42 and the discharge path 43 may be formed in three discrete blocks, respectively.
  • one block serves as the portion of the block 38 in which the horizontal hole 54 is formed (bridge portion).
  • Another block serves as the portion of the block 38 in which the supply path 42 is formed (second connecting portion).
  • the other block serves as the portion of the block 38 in which the discharge path 43 is formed (fourth connecting portion).
  • the portion of the first flange 56 in which the through hole 62 is formed (sixth connecting portion) and the portion of the first flange 56 in which the through hole 64 is formed (first connecting portion) may also be formed into two discrete flanges, respectively.
  • the portion of the second flange 82 in which the through hole 62 is formed (fifth connecting portion) and the portion of the second flange 82 in which the through hole 64 is formed (third connecting portion) may also be formed into two discrete flanges, respectively.
  • the supply path 42 , the discharge path 43 and the horizontal hole 54 be formed in the single block 38 , and that the block 38 be connected with the first and second flanges 56 and 82 , as in the one embodiment.
  • first and second flanges 56 and 82 are fastened to the block 38 with the single connecting bolt 80
  • a plurality of connecting bolts may be used instead. From the standpoint of reducing the number of parts, however, it is preferable that the first and second flanges 56 and 82 be fastened to the block 38 with the single connecting bolt 80 as in the one embodiment.
  • the shape of the bracket 86 is not particularly limited.
  • the pin holes 94 and the pins 96 are formed in the bracket 86 and the partition wall 8 , respectively.
  • the partition wall 8 may be provided with pin holes, and the bracket 86 with pins.
  • the engaging members between the bracket 86 and the partition wall 8 are not limited to the pins and the pin holes, and the shape of the buffering member 98 is not particularly limited, either.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Sorption Type Refrigeration Machines (AREA)
US11/810,296 2006-06-06 2007-06-05 Automotive air-conditioning system Abandoned US20070277549A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-157307 2006-06-06
JP2006157307A JP4912757B2 (ja) 2006-06-06 2006-06-06 車両用空調システム

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US20070277549A1 true US20070277549A1 (en) 2007-12-06

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US11/810,296 Abandoned US20070277549A1 (en) 2006-06-06 2007-06-05 Automotive air-conditioning system

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US (1) US20070277549A1 (de)
EP (1) EP1864839B1 (de)
JP (1) JP4912757B2 (de)
AT (1) ATE428587T1 (de)
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EP1864839B1 (de) 2009-04-15
EP1864839A1 (de) 2007-12-12
ATE428587T1 (de) 2009-05-15
DE602007000885D1 (de) 2009-05-28
JP2007326389A (ja) 2007-12-20
JP4912757B2 (ja) 2012-04-11

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