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CN-116729071-B - Air conditioning device for vehicle and automobile air conditioning system

CN116729071BCN 116729071 BCN116729071 BCN 116729071BCN-116729071-B

Abstract

An air conditioner for a vehicle includes an air conditioning case, an evaporator, a heater, and a damper for performing air temperature adjustment, wherein the evaporator and the heater are sequentially accommodated in the air conditioning case in an air flow direction, the damper is provided between the evaporator and the heater, a cool air passage bypassing the heater and a hot air passage passing through the heater are formed in the air conditioning case, the damper is selectively rotatable between a first limit position and a second limit position so that air selectively flows through the cool air passage or the hot air passage, the damper has a door plate portion and a rotation shaft portion, and a blocking member for preventing condensed water dropped from the evaporator from being introduced into the heater is provided on the rotation shaft portion. The invention also discloses an automobile air conditioning system comprising the air conditioning device for the vehicle.

Inventors

  • GU HUANGHUA
  • ZHAO CHENJUN
  • TANG PINGFENG
  • CHEN XIAOLONG

Assignees

  • 翰昂汽车零部件有限公司

Dates

Publication Date
20260505
Application Date
20220301

Claims (14)

  1. 1. An air conditioning device (1) for a vehicle, comprising: an air-conditioning case (10); An evaporator (30); heater (40) A damper (50) for performing air temperature adjustment, Wherein the evaporator (30) and the heater (40) are accommodated in the air-conditioning case (10) in this order in the air flow direction, the damper (50) is provided between the evaporator (30) and the heater (40), a cold air passage (12) bypassing the heater (40) and a hot air passage (14) passing through the heater (40) are formed in the air-conditioning case (10), the damper (50) is selectively rotatable between a first limit position and a second limit position so that air selectively flows through the cold air passage (12) or the hot air passage (14), the damper (50) has a door plate portion (51) and a rotation shaft portion (52), characterized in that a blocking member for preventing condensed water dropped from the evaporator (30) from being introduced into the heater (40) is provided on the rotation shaft portion (52), Wherein the blocking member is a first skirt (56) and a second skirt (57) protruding radially outward from the rotation shaft portion (52), and an air flow seal rib (15) cooperating with the first skirt (56) and the second skirt (57) is provided inside the air conditioning case (10).
  2. 2. The vehicular air conditioning device according to claim 1, wherein the first skirt (56) and the second skirt (57) each extend along an axial direction of the rotary shaft portion (52), and in the first limit position, the first skirt (56) of the damper (50) abuts against the air flow seal rib (15) and forms a seal, and in the second limit position, the second skirt (57) of the damper (50) abuts against the air flow seal rib (15) and forms a seal.
  3. 3. The vehicular air conditioning device according to claim 1, wherein the damper (50) is capable of being placed at an intermediate position between the first limit position and the second limit position, so that a part of air flows through the cold air passage (12) and another part of air flows through the hot air passage (14), and then the two parts of air are mixed.
  4. 4. The vehicular air conditioning device according to claim 1, wherein the damper (50) is integrally injection-molded from a hard engineering plastic and a thermoplastic elastomer material.
  5. 5. The vehicular air conditioner according to claim 1, wherein the door panel portion (51) has a substantially rectangular flat plate shape, the rotation shaft portion (52) is integrally formed on one long side of the door panel portion (51), and a plurality of reinforcing ribs (53) are integrally provided between the door panel portion (51) and the rotation shaft portion (52).
  6. 6. The vehicular air conditioning device according to claim 1, wherein the first skirt (56) and the second skirt (57) are made of a thermoplastic elastomer material, and are molded together with the rotation shaft portion (52).
  7. 7. The vehicular air conditioning device according to claim 1, wherein the air flow seal bead (15) is formed extending upward from an upper surface of a partition (19) in the air conditioning case (10), and the upper surface of the partition (19) is flat or convex.
  8. 8. The air conditioning device for a vehicle according to claim 1, wherein a hot air passage seal rib (17) and a cold air passage seal rib (13) are formed on an inner wall near an air outlet (16) of the air conditioning case (10), and are engaged with damper (50) in a first limit position and a second limit position, respectively.
  9. 9. The vehicular air conditioner according to claim 8, wherein a seal edge (54) is formed on an edge side of a door panel portion (51) of a damper (50), the seal edge (54) cooperating with the hot air passage seal bead (17) and the cold air passage seal bead (13) to form the cold air passage (12) and the hot air passage (14), respectively.
  10. 10. The air conditioner for a vehicle according to claim 1, wherein a rotation output shaft (55) is formed at both ends of the rotation shaft portion (52), respectively, the rotation output shaft (55) is penetrated from a support through hole in the air conditioning case (10), a portion of the rotation shaft portion (52) near the rotation output shaft (55) is formed with a sleeve (59) surrounding the rotation shaft portion (52) that flares outwardly from the rotation shaft portion (52) in a horn shape, the sleeve (59) abutting against the air conditioning case (10) and covering the support through hole.
  11. 11. The air conditioning apparatus for a vehicle according to claim 1, wherein the evaporator (30) is inclined toward the heater (40).
  12. 12. The vehicular air conditioning device according to claim 1, wherein the air conditioning case (10) includes a drain system (60) including a first drain port (62) and a second drain port (64), the first drain port (62) being provided downstream of the evaporator (30), the second drain port (64) being connected to the first drain port (64) for draining condensed water guided by the blocking member.
  13. 13. A vehicular air conditioning apparatus according to claim 3, wherein the rotation shaft portion (52) is closer to the evaporator (30) than a distal end of the damper (50) when the damper (50) is located at the first limit position or the intermediate position.
  14. 14. An automotive air conditioning system comprising an air conditioning device (1) for a vehicle according to any one of claims 1-13.

Description

Air conditioning device for vehicle and automobile air conditioning system Technical Field The present invention relates to an air conditioner for a vehicle. The invention also relates to an automobile air conditioning system comprising the air conditioning device for the vehicle. Background This section provides background information related to the present application, which does not necessarily constitute prior art. In general, a vehicle is equipped with a vehicle air conditioner. The air conditioner for a vehicle is used to adjust the temperature and humidity in the passenger compartment by supplying cool air or warm air to the passenger compartment or by mixing cool air and warm air and supplying them to the passenger compartment. On the other hand, the air conditioning apparatus for a vehicle uses a refrigerant (e.g., R-134a, R-1234yf, etc.) to circulate in a refrigeration cycle, thereby absorbing heat of air inside the vehicle and discharging the heat to the air outside the vehicle, and thereby reducing the temperature of the air inside the vehicle. The refrigeration cycle is typically composed of an evaporator, a compressor, a condenser, an expansion valve, a receiver drier, an air conditioning duct, a condensing fan, and the like. The refrigerant generally undergoes a process in which a compressor sucks low-temperature low-pressure gaseous refrigerant from an outlet of an evaporator, compresses the low-temperature low-pressure gaseous refrigerant into high-temperature high-pressure gaseous refrigerant, discharges the high-pressure gaseous refrigerant to the compressor, the high-temperature high-pressure superheated gaseous refrigerant enters a condenser, condenses the gaseous refrigerant into liquid due to pressure and temperature reduction and emits a large amount of heat, the liquid refrigerant with higher temperature and pressure becomes large in volume after passing through an expansion device, the pressure and temperature drop sharply, vaporous liquid refrigerant (fine liquid drops) is discharged out of the expansion device, and vaporous liquid refrigerant enters the evaporator, and the liquid refrigerant evaporates into a gaseous state due to the fact that the boiling point of the refrigerant is far lower than the temperature in the evaporator. On the other hand, the air conditioning apparatus for a vehicle includes an air conditioning case and a blower accommodated in the air conditioning case, wherein the blower blows air into the air conditioning case. The inside of the air-conditioning case also accommodates the above-mentioned evaporator for performing a cooling function and a heater for performing a heating function. The air conditioner housing is also provided inside with a mode damper for performing air flow blowing mode conversion, and a temperature damper for performing air temperature adjustment. The temperature damper selectively bypasses the heater or passes through the heater with the air cooled by the evaporator or bypasses the heater with a portion of the air passing through the heater and then blows the mixed air of an appropriate temperature into the passenger compartment via the air passage in the corresponding air conditioning case. During operation of the air conditioner for a vehicle, condensed water is generated at the evaporator. In order to avoid water accumulation in the air-conditioning case, a drain port is generally provided at the bottom of the air-conditioning case, so as to drain the condensed water in the air-conditioning case through the drain port. Some trace condensed water on the evaporator possibly flies away from the evaporator in the form of tiny water drops and water mist along with the airflow structure, passes a flight distance, accumulates on a temperature air door and then flows downwards along with gravity. Existing dampers have a door panel portion and a rotating shaft portion. A recess for accommodating the rotating shaft portion is formed in the air conditioner case. The rotary shaft portion of the damper rotates within the recess and is supported at both ends of the rotary shaft portion via structures such as support (e.g., bearing) through holes in the air conditioning case. In some vehicle air conditioning apparatuses, the evaporator is inclined toward the heater. When the temperature damper is at a certain limit position or an intermediate position, the rotation shaft portion of the temperature damper is closer to the evaporator than the distal end of the temperature damper, and condensed water dropped from the evaporator may be introduced into the heater located downstream. In addition, during operation of the air conditioner for a vehicle, the air flow cooled by the evaporator may carry part of droplets and accumulate on the door panel portion of the temperature damper to form a condensed water flow. When the rotation position of the door panel is higher than the rotation axis position, condensed water may flow into the groove of the air