WO2014045767A1 - Dispositif de climatisation de véhicule - Google Patents

Dispositif de climatisation de véhicule Download PDF

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Publication number
WO2014045767A1
WO2014045767A1 PCT/JP2013/071932 JP2013071932W WO2014045767A1 WO 2014045767 A1 WO2014045767 A1 WO 2014045767A1 JP 2013071932 W JP2013071932 W JP 2013071932W WO 2014045767 A1 WO2014045767 A1 WO 2014045767A1
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
air conditioner
vehicle air
vehicle
shroud
Prior art date
Application number
PCT/JP2013/071932
Other languages
English (en)
Japanese (ja)
Inventor
章寛 小池
Original Assignee
日産自動車株式会社
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
Application filed by 日産自動車株式会社 filed Critical 日産自動車株式会社
Priority to JP2014536684A priority Critical patent/JP5915761B2/ja
Publication of WO2014045767A1 publication Critical patent/WO2014045767A1/fr

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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
    • B60H1/3227—Cooling devices using compression characterised by the arrangement or the type of heat exchanger, e.g. condenser, evaporator
    • 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

Definitions

  • the present invention relates to a vehicle air conditioner [an air conditioner for a vehicle].
  • Patent Document 1 discloses an air conditioner for an electric vehicle using a heat pump cycle (refrigeration cycle) that is also used for air conditioning, similar to a home air conditioner.
  • the outdoor heat exchanger arranged in the motor compartment at the front of the vehicle functions as an evaporator during heating and functions as a condenser during cooling.
  • An outdoor fan is disposed behind the outdoor heat exchanger.
  • an outdoor heat exchanger may be iced (frosted) due to moisture from the outside air during heating operation.
  • the outdoor heat exchanger When the outdoor heat exchanger is iced (frosted), its heat exchange efficiency is lowered, and thus ice (frost) is melted by deice / defrost operation.
  • the water generated by the dissolution flows down the outdoor heat exchanger and accumulates in the lower part of the shroud covering the outdoor fan. If the accumulated water freezes, there is a concern about the malfunction of the outdoor fan.
  • An object of the present invention is to provide a vehicle air conditioner that can prevent water adhering to a heat exchanger from collecting in a shroud of a blower and prevent malfunction of the blower due to freezing of accumulated water. is there.
  • a feature of the present invention is an air conditioner for a vehicle, wherein the heat exchanger performs heat exchange between a refrigerant flowing inside and outside air, and is disposed in front of or behind the heat exchanger, so that the heat exchange is performed.
  • a blower that allows the outside air to pass through the ventilator, and a shroud that has a cylindrical flange that surrounds the outer periphery of the blower, and a drain port that drains water flowing down from the heat exchanger to the outside, the bottom of the cylindrical flange
  • the air conditioner for vehicles formed in the said heat exchanger side is provided.
  • the vehicle air conditioner of this embodiment is mounted on an electric vehicle, and uses a heat pump cycle (refrigeration cycle) that also serves as an air conditioning unit, similar to a home air conditioner.
  • a heat pump cycle refrigeration cycle
  • an air conditioning duct 3 extends in the front-rear direction in a motor compartment 1 at the front of the vehicle.
  • a radiator 5 Inside the duct 3, from the front to the rear, a radiator 5, an outdoor heat exchanger [outside ⁇ heat exchanger] (heat exchanger in claims) 7, an outdoor fan [outside fans] (blower in claims) 9 are arranged in this order.
  • the outdoor heat exchanger 7 is one of the components of the heat pump cycle.
  • the radiator 5 is provided to cool a heat source such as a drive motor (not shown).
  • a pipe for circulating a coolant such as cooling water is connected between the heat source and the radiator 5.
  • the refrigerant heated by the heat generation source is cooled by the outside air.
  • the cooled cooling water is sent again to the heat generation source.
  • a passenger compartment 11 is provided behind the motor compartment 1 (on the right side in FIG. 3) via a dash panel (indicated by a one-dot chain line in FIG. 3).
  • An air conditioning unit 12 is disposed in the passenger compartment 11.
  • An evaporator 13 and a condenser 14 are arranged in the air conditioning unit 12.
  • Each of the evaporator 13 and the condenser 14 is one of the components of the heat pump cycle.
  • the evaporator 13 and the condenser 14 constitute an indoor heat exchanger. In the cooling operation, the evaporator 13 cools the air supplied to the passenger compartment 11, and in the heating operation, the condenser 14 warms the air supplied to the passenger compartment 11.
  • a first flow path 12a in which a condenser 14 is disposed, and a second flow path 12b separated from the first flow path 12a by a partition wall 15 are provided.
  • An air mix door 16 is provided at an end of the partition wall 15 on the evaporator 13 side. During heating, the air mix door 16 is set at a position indicated by a solid line, and the conditioned air heated by the condenser 14 is supplied to the vehicle compartment 11 through the first flow path 12a. At the time of cooling, the air mix door 16 is set at a position indicated by a two-dot chain line, and the conditioned air cooled by the evaporator 13 is supplied to the vehicle compartment 11 through the second flow path 12b.
  • the outdoor heat exchanger 7, the evaporator 13 and the condenser 14 are connected to each other by a refrigerant pipe 17.
  • a compressor 19 two expansion valves (orifices) 20 and 21, a two-way valve 22 and a three-way valve 23 disposed in the motor compartment 1 are also provided on the refrigerant pipe 17.
  • the outdoor fan 9 sends outside air to the radiator 5 and the outdoor heat exchanger 7 to promote heat exchange in the radiator 5 and the outdoor heat exchanger 7.
  • FIG. 2 is a perspective view of the outdoor heat exchanger unit 25 as viewed from the vehicle rear side
  • FIG. 1 is an exploded perspective view of the outdoor heat exchanger unit 25 as viewed from the vehicle front side.
  • the outdoor heat exchanger 7 is disposed on the front surface of a carrier 27 configured by a substantially rectangular frame that is long in the lateral direction, and is fixed to the carrier 27 from behind by a plurality of bolts 29. Yes.
  • the lower portion of the carrier 27 is supported by a lower support [lower support] (cross member) 31, and the upper portion is supported by an upper support [upper support] 33.
  • the lower support body 31 and the upper support body 33 are formed long in the lateral direction, and are fixed to the vehicle body.
  • the carrier 27, the lower support body 31 and the upper support body 33 constitute a support member [support member].
  • the two outdoor fans 9 are arranged side by side and are driven by a fan motor.
  • the outdoor fan 9 is rotatably supported by a fan shroud (fan shroud) 35.
  • the fan shroud 35 includes a cylindrical flange 35 a that protrudes to the opposite side of the outdoor heat exchanger 7 for each of the outdoor fans 9.
  • the cylindrical flange 35a surrounds the outer periphery of the outdoor fan 9.
  • the fan shroud 35 is assembled to the carrier 27 from the rear, and is fixed to the carrier 27 by a plurality of bolts 37.
  • the fan shroud 35 has a bottom wall 35c extending laterally at the bottom thereof.
  • the bottom wall 35 c is integrated with the cylindrical flange 35 a and projects forward from the outdoor fan 9.
  • the bottom wall 35c is formed with cutouts 35d corresponding to the outdoor fan 9 and opened forward.
  • Each notch 35d is formed in a rectangular shape that is long in the horizontal direction in plan view.
  • three U-shaped recesses [notches] 35e are formed at the rear edge of each notch 35d.
  • the recess 35e communicates with the notch 35d, and is formed from the bottom wall 35c to the bottom 35a1 of the cylindrical flange 35a.
  • each notch 35 one of the recesses 35e is provided at the center of the notch 35d, and the other two are provided at both ends of the notch 35d.
  • One notch 35d and three recesses 35e form one drain outlet.
  • the drain outlet may be formed by a single notch formed in a rectangular shape from the bottom wall 35c to the bottom 35a1. That is, the drain outlet in this case is formed by forming the cutout portion 35d of this embodiment not only from the bottom wall 35c but from the bottom wall 35c to the bottom portion 35a1.
  • the drain outlet is a vertical line passing through the center O and a straight line A connecting the center O of the cylindrical flange 35 a and one end P on the cylindrical flange 35 a of the notch 35 d (drain outlet).
  • the angle ⁇ (> 0) formed by the line T is formed to be at least 15 degrees.
  • the bottom portion 35 a 1 in which the concave portion 35 e is formed is located below the bottom wall 35 c and is located at the lowermost portion of the entire fan shroud 35. Therefore, the central recess 35 e among the three recesses 35 e is located at the lowermost end of the fan shroud 35.
  • the drain port (notch 35 d and recess 35 e) is the lowermost end of the outdoor fan 9. It is located directly below 9a, that is, vertically below.
  • H 1 a horizontal line at the time of pitching in which the front part of the vehicle body is lifted upward from the rear part
  • H 2 a horizontal line at the time of pitching in which the rear part is lifted upward from the front part
  • 6 and 7 show a lower support body (cross member) 31 extending in the lateral direction.
  • the carrier 27 is positioned between the two outdoor fans 9 and an upper portion 27a and a lower portion 27b extending in the lateral direction, side portions 27c and 27d connected to both ends of the upper portion 27a and the lower portion 27b, respectively. And a central portion 27e connected to the center of the upper portion 27a and the lower portion 27b.
  • the rear end 27b1 of the lower portion 27b and the front end 35c1 of the bottom wall 35c of the fan shroud 35 are brought into contact with each other.
  • the open side of the notch 35d formed in the bottom wall 35c is closed by the lower portion 27b. Therefore, the drainage port composed of the notch 35d and the three recesses 35e is provided at the abutting portion between the fan shroud 35 and the carrier 27 constituting the support member.
  • the high-temperature refrigerant compressed by the compressor 19 dissipates heat in the condenser 14 and is condensed.
  • the air mix door 16 is set at a solid line position, and the outside air sucked by the indoor intake fan (not shown) as shown by an arrow C passes through the evaporator 13 and the condenser 14,
  • the conditioned air (warm air) is supplied from the first flow path 12a to the vehicle compartment 11.
  • the refrigerant discharged from the condenser 14 passes through the expansion valve 20 and is heated by the outdoor heat exchanger 7, and is returned to the compressor 19 through the three-way valve 23.
  • the refrigerant does not flow through the expansion valve 21 and the evaporator 13.
  • the two-way valve 22 is closed. That is, in the heating operation, the three-way valve 23 causes the refrigerant to flow from the outdoor heat exchanger 7 to the compressor 19, bypassing the expansion valve 21 and the evaporator 13.
  • the outdoor heat exchanger 7 may be iced (frosted) by moisture from the outside air (particularly, between the tubes).
  • the heat exchange efficiency is lowered. Therefore, the degassing / frosting operation is performed by flowing hot gas through the outdoor heat exchanger 7.
  • the high-temperature refrigerant compressed by the compressor 19 flows through the condenser 14 as in the heating operation, but the air mix door 16 is set at a two-dot chain line position. Heat dissipation is suppressed. At this time, the indoor intake fan is not operated.
  • the high-temperature refrigerant (hod gas) discharged from the condenser 14 flows into the outdoor heat exchanger 7 through the two-way valve 22. Since the high-temperature refrigerant flows inside the outdoor heat exchanger 7, ice and frost are melted.
  • the refrigerant discharged from the outdoor heat exchanger 7 is returned to the compressor 19 through the three-way valve 23.
  • the water W generated by melting ice and frost by the deicing / frosting operation flows down to the lower part 27 b of the carrier 27 supporting the outdoor heat exchanger 7, and further the fan shroud 35. It flows toward.
  • the drain port (notch 35d and recess 35e) is provided in the bottom wall 35c of the fan shroud 35, the water W is discharged downward from the drain port. Therefore, it is possible to suppress the accumulation of water at the bottom of the fan shroud 35, and it is possible to prevent malfunction of the outdoor fan 9 due to freezing of the accumulated water.
  • the drain outlet is located on the outdoor heat exchanger 7 side of the bottom 35a1 of the cylindrical flange 35a of the fan shroud 35, the water W flowing from the outdoor heat exchanger 7 can be quickly and effectively used. Can be discharged from the drain.
  • a carrier (support member) 27 that covers at least the lower part of the outdoor heat exchanger 7 and supports the fan shroud 35 is provided. Further, the drainage opening (notch 35 d and recess 35 e) of the fan shroud 35 is provided at the abutting portion between the fan shroud 35 and the carrier 27. For this reason, by cutting out the front end 35c1 on the carrier 27 side of the bottom wall 35c of the fan shroud 35, the drain port (notch 35d and recess 35e) can be easily formed.
  • the bottom portion 35 a 1 of the cylindrical flange 35 a is located at the lowermost portion of the fan shroud 35. Further, the central recess 35 e among the three recesses 35 e formed in the bottom 35 a 1 is located at the lowermost end of the fan shroud 35. Accordingly, the water W flowing from the outdoor heat exchanger 7 is reliably discharged from the recess 35e located at the lowermost end. That is, a highly reliable drainage structure is realized.
  • the drain ports are formed so that the angle ⁇ formed by the vertical line T and the straight line A or B is at least 15 degrees. Yes.
  • the roll angle of the vehicle body during normal travel rarely exceeds 15 degrees. Therefore, by forming the drainage port (notch 35d and recess 35e) so that the above-described angle ⁇ is at least 15 degrees, the drainage port is opened downward in the vertical direction even when the vehicle body is rolled. As a result, drainage is reliably performed regardless of the posture of the vehicle body.
  • the drain port (notch 35d and recess 35e) is located below the outdoor fan (blower) 9 in the vertical direction even when the pitching angle of the vehicle body is 15 degrees at the maximum.
  • the pitching angle of the vehicle body during normal driving rarely exceeds 15. Therefore, even when the vehicle body is pitched, the drainage port (notch 35d and recess 35e) is located immediately below the lowermost end 9a of the outdoor fan 9, so that the water W is quickly discharged from the drainage port (notch 35d and recess 35e).
  • the As a result drainage is reliably performed regardless of the posture of the vehicle body. In particular, when the water W adheres to the outdoor fan 9 and freezes, the outdoor fan 9 tends to malfunction. Therefore, promptly discharging the water W adhering to the outdoor fan 9 is effective in preventing malfunction.
  • the outdoor heat exchanger 7 functions as an evaporator in a heat pump cycle in heating operation. For this reason, even if a large amount of water is generated by performing deicing / frosting operation when the outdoor heat exchanger 7 is icing (frosting) in the heating operation, water can be quickly discharged from the drain outlet. .
  • the drain outlet does not drain only the water in which ice or frost adhered to the outdoor heat exchanger 7 is melted by the deicing / frosting operation, but adheres to the radiator 5 or the outdoor heat exchanger 7 while the vehicle is running. It also drains rain.
  • the vehicle of this embodiment is an electric vehicle, it may be an automobile equipped with an internal combustion engine.
  • the water adhering to the radiator for cooling the internal combustion engine is also drained from the drain port (notch 35d and recess 35e). That is, the drain port (notch 35d and recess 35e) prevents water flowing from the heat exchanger arranged in front of the air-conditioning outdoor fan (blower) from freezing below the fan shroud 35. , Avoid malfunction of outdoor fans.
  • the outdoor fan (blower) 9 is disposed behind the outdoor heat exchanger 7.
  • the outdoor fan (blower) 9 is disposed in front of the outdoor heat exchanger 7 and pushes the outside air into the outdoor heat exchanger 7. Good. That is, the blower is arranged in front of or behind the heat exchanger.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

La présente invention concerne un dispositif de climatisation de véhicule équipé : d'un échangeur de chaleur destiné à échanger de la chaleur entre l'air extérieur et un réfrigérant qui circule à travers l'intérieur de l'échangeur de chaleur ; d'une soufflante disposée devant ou derrière l'échangeur de chaleur et provoquant le passage de l'air extérieur à travers l'échangeur de chaleur ; et d'une enveloppe comportant un rebord cylindrique destiné à couvrir la périphérie extérieure de la soufflante. Selon l'invention, une ouverture de décharge d'eau destinée à décharger vers l'extérieur de l'eau qui s'écoule vers le bas depuis l'échangeur de chaleur est formée dans la partie inférieure du rebord cylindrique à une position qui se trouve près de l'échangeur de chaleur. Dans le dispositif de climatisation de l'invention, l'eau qui adhère à l'échangeur de chaleur ne peut pas s'accumuler dans l'enveloppe de la soufflante, ce qui empêche par conséquent la défaillance fonctionnelle de la soufflante provoquée par le gel de l'eau accumulée.
PCT/JP2013/071932 2012-09-21 2013-08-14 Dispositif de climatisation de véhicule WO2014045767A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014536684A JP5915761B2 (ja) 2012-09-21 2013-08-14 車両用空気調和装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012207854 2012-09-21
JP2012-207854 2012-09-21

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WO2014045767A1 true WO2014045767A1 (fr) 2014-03-27

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PCT/JP2013/071932 WO2014045767A1 (fr) 2012-09-21 2013-08-14 Dispositif de climatisation de véhicule

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WO (1) WO2014045767A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05116527A (ja) * 1991-10-28 1993-05-14 Matsushita Electric Ind Co Ltd 自動車用ヒートポンプ冷暖房空気調和装置
JP2003034130A (ja) * 2001-07-24 2003-02-04 Hitachi Ltd 自動車用空気調和機
JP2003148834A (ja) * 2001-11-12 2003-05-21 Denso Corp 冷媒蒸発器
JP2010260541A (ja) * 2009-05-08 2010-11-18 Honda Motor Co Ltd 車両空調システム用エバポレータ組立品、車両用空調システムおよび車両用ｈｖａｃシステム
JP2012116415A (ja) * 2010-12-03 2012-06-21 Panasonic Corp 車両用空調装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06137147A (ja) * 1992-10-26 1994-05-17 Nippondenso Co Ltd 車両用水冷式内燃機関の冷却装置
US7654307B2 (en) * 2006-01-18 2010-02-02 Delphi Technologies, Inc. Evaporative cooler assisted automotive air conditioning system
JP2009186108A (ja) * 2008-02-07 2009-08-20 Nissan Motor Co Ltd 熱交換器
FR2963278A1 (fr) * 2010-07-28 2012-02-03 Peugeot Citroen Automobiles Sa Gestion du risque de givrage sur un dispositif de chauffage de vehicule

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05116527A (ja) * 1991-10-28 1993-05-14 Matsushita Electric Ind Co Ltd 自動車用ヒートポンプ冷暖房空気調和装置
JP2003034130A (ja) * 2001-07-24 2003-02-04 Hitachi Ltd 自動車用空気調和機
JP2003148834A (ja) * 2001-11-12 2003-05-21 Denso Corp 冷媒蒸発器
JP2010260541A (ja) * 2009-05-08 2010-11-18 Honda Motor Co Ltd 車両空調システム用エバポレータ組立品、車両用空調システムおよび車両用ｈｖａｃシステム
JP2012116415A (ja) * 2010-12-03 2012-06-21 Panasonic Corp 車両用空調装置

Also Published As

Publication number Publication date
JP5915761B2 (ja) 2016-05-11
JPWO2014045767A1 (ja) 2016-08-18

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