KR20230006510A - car air conditioner - Google Patents

Abstract

[Task] To provide a vehicle air conditioner with a long product life.
[Solution] In the case 40 of the vehicle air conditioner 10, a case hole 41 is provided at a portion facing the first flow path 51. In this case hole portion 41, there is an aspirator 60 that sucks in the air in the cabin using the outflow air flowing out of the case hole portion 41, and at the same time flows out the outflow air and the sucked air in the cabin. It is installed. The case hole portion 41 is preferably provided on the upper surface 40b of the case 40 . Further, in the case where the portion of the case 40 facing the partition wall 25 is the opposing wall portion 40a, the case hole portion 41 is a portion closer to the partition wall 25 than the opposing wall portion 40a. It is desirable to have it installed in

Description

car air conditioner

The present invention relates to an air conditioner for a vehicle for adjusting the temperature in a vehicle cabin.

BACKGROUND OF THE INVENTION [0002] In many vehicles, a vehicle air conditioner is mounted in order to adjust the temperature and the like in the vehicle cabin. As a prior art related to an air conditioner for vehicles, there is a technique disclosed in Patent Literature 1.

The vehicle air conditioner disclosed in Patent Literature 1 is divided into a first flow path and a second flow path by providing a partition wall in the flow path formed inside the case, and providing temperature control means for adjusting the temperature in each flow path. are doing Further, an opening/closing door for adjusting the amount of air blown out of the air outlet is provided at the air outlet of each passage. With these, it is possible to adjust the temperature and amount of air blown out from the air outlet for each seat.

Japanese Unexamined Patent Publication No. 2008-296717

In the vehicle air conditioner disclosed in Patent Literature 1, for example, only the air outlet of the second flow path is opened, and the air outlet of the first flow path is closed. In this case, since almost no air flows through the first flow path, heat fills the area around the heater. There is a possibility that the case or the like may deteriorate due to the excessive heat. If the influence by heat can be reduced, the product life of a vehicle air conditioner can be lengthened.

An object of the present invention is to provide a vehicle air conditioner having a long product life.

In the following description, in order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are added in parentheses, but the present invention is not limited to the illustrated form by this.

According to the present invention, in a vehicle air conditioner (10; 10A) disposed in a vehicle cabin,

A case 40 having an air flow path 50 formed therein;

An evaporator 23 disposed in the flow path 50 to cool air;

A heater (24; 84) for heating the air passing through the evaporator (23);

A partition wall (25) capable of partitioning the flow path (50) and dividing the air passing through the heater (24; 84) into a first flow path (51) and a second flow path (52);

a first temperature control unit (26) installed in the first flow path (51) and regulating the temperature of the air flowing through the first flow path (51);

a second temperature control means (27) installed in the second flow path (52) and regulating the temperature of the air flowing through the second flow path (52);

A first air outlet (42, 43, 47; 49) formed in the case (40) to discharge air flowing through the first flow path (51);

A first opening and closing door (32, 33, 37; 39) capable of adjusting the amount of air blown out from the first air outlet (42, 43, 47; 49);

second air outlets 44 to 46 and 48 formed in the case 40 and discharging air flowing through the second flow path 52;

And a second opening and closing door (34 to 36, 38) capable of adjusting the amount of air blown out from the second outlet (44 to 46, 48),

The first opening/closing door (32, 33, 37; 39) can block the first outlet (42, 43, 47; 49),

In the case 40, a case hole 41 is installed at a portion facing the first flow path 51,

In this case hole portion 41, an aspirator 60 that sucks in the air in the cabin using outflow air flowing out from the case hole portion 41 and simultaneously flows out the outflow air and the sucked air in the cabin. An air conditioner for a vehicle in which is installed is provided.

In the present invention, a vehicle air conditioner having a long product life can be provided.

1 is a perspective view of an air conditioner for a vehicle according to a first embodiment.
FIG. 2 is a schematic view of the vehicle air conditioner shown in FIG. 1 .
3 is a perspective view of the aspirator shown in FIG. 1;
4 is a cross-sectional view of the aspirator shown in FIG. 3;
5 is a schematic diagram of an air conditioner for a vehicle according to a second embodiment.

EMBODIMENT OF THE INVENTION Embodiment of this invention is described below based on an accompanying drawing. In addition, in the description, left and right refer to left and right based on the occupant of the vehicle equipped with the vehicle air conditioner, and front and rear refer to front and rear based on the traveling direction of the vehicle. In the drawing, Fr denotes front, Rr denotes rear, Le denotes left, Ri denotes right, Up denotes upper, and Dn denotes lower.

<Example 1>

See Figures 1 and 2. The vehicle air conditioner 10 (hereinafter simply referred to as “air conditioner 10”) that regulates the temperature and the like in the cabin Vi is mounted on, for example, a passenger car. The air conditioner 10 is arranged so as to extend generally in the left-right direction from the front inside the cabin Vi.

In the cabin Vi, in addition to the air conditioner 10, seats S1 to S4 on which the occupant sits are installed. The seats S1 to S4 are located behind the front seat seat S1 (front seat S1) disposed on the left side of the front row, the front right seat S2 disposed on the right side of the front row, and the front seat seat S1, respectively. The rear seat S3 and the rear seat S4 are arranged behind the front right seat S2.

The air conditioner 10 can blow air toward each of the seats S1 to S4. In addition, the air conditioner 10 can send air of different temperatures to the left seats S1 and S3 and the right seats S2 and S4. Details of the air conditioner 10 will be described below.

See Figure 2. The air conditioner 10 includes a blower unit 11 that blows inhaled air, and a temperature control unit 20 that adjusts the temperature of the air blown from the blower unit 11 and discharges it into the vehicle interior.

The blower 11 houses an impeller 11a and a motor not shown. The driving of the motor rotates the impeller 11a, and air inside the cabin and/or outside the cabin is sucked into the blower 11. The air sucked into the blower 11 is supplied to the front of the temperature control unit 20 disposed on the downstream side with respect to the air flow direction. Hereinafter, when simply referring to "upstream" and "downstream", the direction of air flow is used as a reference.

See Figure 2. The temperature control unit 20 includes a case 40 connected to the blowing unit 11 (see FIG. 1) and having an air flow path 50 formed therein, and an evaporator disposed on the flow path 50 to cool the air. 23, a heater 24 installed downstream of the evaporator 23 and heating the air that has passed through the evaporator 23, and the air that has passed through this heater 24 is separated from the first flow path 51 A partition wall (25) capable of dividing into two flow passages (52) and a first temperature control means (26) installed in the first flow passage (51) and regulating the temperature of air flowing through the first flow passage (51) and a second temperature regulating means (27) installed in the second flow path (52) for regulating the temperature of the air flowing through the second flow path (52), and a case hole portion that is open to the case (40). Facing (41), an aspirator (60) is provided for sucking in air in the compartment (Vi) using outflow air flowing out from the case hole (41).

The case 40 is manufactured by injection molding of a resin material such as polypropylene, and is formed downstream of the first flow passage 51, and has a first vent outlet ( 42), a first foot outlet 43 formed downstream of the first flow path 51 and blowing air to the legs of the occupant seated on the front seat seat S1, and formed downstream of the second flow path 52 A second vent outlet 44 that blows air to the upper body of the occupant sitting on the front seat S2, and a second vent outlet 44 formed downstream of the second flow path 52 to blow air to the legs of the occupant sitting on the front seat S2 Downstream of the second foot outlet 45, the defroster outlet 46 for blowing air from the second flow path 52 toward the windshield and suppressing fogging of the windshield, and the first flow path 51 A first rear air outlet 47 formed downstream of the second flow passage 52 to send air to the occupant sitting on the rear seat S3, and a second outlet 47 to blow air to the occupant seated on the rear seat S4. A rear air outlet 48 is provided.

The first vent outlet 42, the first foot outlet 43, and the first rear air outlet 47 all face the first flow path 51, and have a common point. Hereinafter, the first vent outlet 42, the first foot outlet 43, and the first rear outlet 47 are collectively referred to as first outlets 42, 43, and 47.

The second vent outlet 44, the second foot outlet 45, the defroster outlet 46, and the second rear air outlet 48 all face the second flow path 52, and have a common point. Hereinafter, the second vent outlet 44, the second foot outlet 45, the defroster outlet 46, and the second rear outlet 48 are collectively referred to as second outlets 44 to 46 and 48.

Also, the defroster outlet 46 can be formed so as to face the first flow path 51 . In this case, the defroster outlet 46 is included in the first outlet.

A first vent opening/closing door 32 (first opening/closing door 32) capable of adjusting the amount of air blown out from the first vent outlet 42 is provided in a portion facing the first vent outlet 42. . A first foot opening/closing door 33 (first opening/closing door 33) capable of adjusting the amount of air blown out from the first foot outlet 43 is provided in a portion facing the first foot outlet 43. .

A second vent opening/closing door 34 (second opening/closing door 34) capable of adjusting the amount of air blown out from the second vent outlet 44 is provided in a portion facing the second vent outlet 44. . A portion facing the second foot outlet 45 is provided with a second foot opening/closing door 35 (second opening/closing door 35) capable of adjusting the amount of air blown out from the second foot outlet 45. . A defroster opening/closing door 36 (second opening/closing door 36) capable of adjusting the amount of air blown out of the defroster outlet 46 is provided at a portion facing the defroster outlet 46 .

A first rear opening/closing door 37 (first opening/closing door 37) capable of adjusting the amount of air blown out from the first rear air intake 47 is provided in a portion facing the first rear air intake 47. . A second rear opening/closing door 38 (second opening/closing door 38) capable of adjusting the amount of air blown out from the second rear intake opening 48 is provided in a portion facing the second rear intake opening 48. .

The first vent opening/closing door 32, the first foot opening/closing door 33, and the first rear opening/closing door 37 are all open/close doors facing the first outlets 42, 43, 47, and have a common point. . Hereinafter, the first vent opening/closing door 32, the first foot opening/closing door 33, and the first rear opening/closing door 37 are collectively referred to as first opening/closing doors 32, 33, and 37.

The second vent opening and closing door 34, the second foot opening and closing door 35, the defroster opening and closing door 36, and the second rear opening and closing door 38 all face the second outlets 44 to 46 and 48 They are common in that they are open and close doors. Hereinafter, the second vent opening and closing door 34, the second foot opening and closing door 35, the defroster opening and closing door 36, and the second rear opening and closing door 38 are collectively referred to as the second opening and closing doors 34 to 36 and 38 ) is called.

Also, as described above, the defroster outlet 46 may be formed to face the first flow path 51 . At this time, the defroster opening and closing door 36 is included in the first opening and closing door that opens and closes the first outlet.

A first duct D1 for blowing air to an occupant seated on the rear seat S3 extends from the first rear air outlet 47 toward the rear seat S3. Further, a second duct D2 for blowing air to the occupants seated in the rear seat S4 extends from the second rear air outlet 48 toward the rear seat S4.

In addition, the position where the tips of the ducts D1 and D2 face can be appropriately set, such as a B-pillar or the rear end of the center console. Further, the ducts D1 and D2 may be further branched, and the passing portion may be switched according to the operation mode of the air conditioner 10 . Moreover, it is also possible to make the branched ducts face different positions.

The case 40 is formed by combining a plurality of resin molded articles. A portion of the case 40 facing the first flow path 51 and facing the partition wall 25 is called an opposing wall portion 40a.

The first flow path 51 formed inside the case 40 is formed from the first front seat flow path 51a through which air for blowing air to the front seat S1 flows, and from the first front seat flow path 51a. A first back seat passage 51b through which air for branching and blowing air to the rear seat seat S3 is provided.

The second flow passage 52 branches from the second front seat passage 52a through which air for blowing air to the front seat S2 flows, and blows air to the rear seat S4 by branching from the second front seat passage 52a. and a second back seat passage 52b through which air flows.

The case hole portion 41 formed on the upper surface 40b (see Fig. 1) of the case 40 is provided closer to the partition wall 25 than the opposing wall portion 40a. In addition, the case hole portion 41 is provided facing the first flow path 51a for the front seat.

One evaporator 23 is provided so as to cover the upstream end of the first flow path 51 and the upstream end of the second flow path 52 . A refrigerant flows through the evaporator 23, and the air passing through the evaporator 23 is cooled by heat exchange with the refrigerant.

The heater 24 is composed of a hot water heater 24a through which hot water flows, and an electric heater 24b which generates heat by being energized. Both the hot water heater 24a and the electric heater 24b are installed so as to pass through the partition wall 25, and face both the first flow path 51 and the second flow path 52.

The electric heater 24b is equipped with a heat generating element that becomes hot (for example, about 180°C) when energized. When electric power is applied to the heat generating element, it generates heat regardless of the flow state of air in the first flow passage 51 or the second flow passage 52 .

The partition wall 25 extends rearward from a portion adjacent to the rear surface of the evaporator 23 . Further, there may be a gap between the upstream end of the partition wall 25 and the evaporator 23 .

The first temperature control unit 26 is a cantilever type air mixing door swingably installed in the first flow path 51 . When the occupant sets the temperature, a motor (not shown) is activated to swing the first temperature control means 26. By swinging the first temperature regulating means 26, the ratio of the air going to the heater 24 and the air bypassing the heater 24 is adjusted, thereby adjusting the temperature. In the state shown in the figure, all the air passing through the evaporator 23 passes through the heater 24. In addition, although not shown, the 1st temperature control means 26 may be a well-known sliding door instead of a cantilever type door.

The second temperature regulating means (27) is also the same as the first temperature regulating means (26). That is, the second temperature control unit 27 is a cantilever type air mixing door swingably installed in the second flow path 52 . When the occupant sets the temperature, a motor (not shown) is activated to swing the second temperature control means (27). By swinging the second temperature regulating means 27, the ratio of the air going to the heater 24 and the air bypassing the heater 24 is adjusted, thereby adjusting the temperature. In the state shown in the figure, all the air passing through the evaporator 23 passes through the heater 24. In addition, although not shown, the 2nd temperature control means 27 may be a well-known sliding door instead of a cantilever type door.

When the driver switches the driving mode of the first vent opening/closing door 32, a motor (not shown) operates to rotate the first vent opening/closing door 32. When the first vent opening/closing door 32 rotates, blowing of air from the first vent outlet 42 is permitted or restricted. In the state shown in the drawing, the first vent opening/closing door 32 closes the first vent outlet 42 . When the driving mode of the front seat S1 becomes the cooling mode, the first vent opening/closing door 32 rotates approximately 90° to open the first vent outlet 42 .

The other opening/closing doors 33 to 38 are also configured to be rotated to predetermined positions according to the operation mode. For example, the first foot opening/closing door 33 opens the first foot outlet 43 when the driving mode of the front seat S1 becomes the heating mode. Further, the defroster opening/closing door 36 opens the defroster outlet 46 by entering the defroster mode for removing fogging of the windshield.

In the state shown in the figure, the second foot outlet 45 and the defroster outlet 46 are open. The first foot outlet 43, the second vent outlet 44, the first rear outlet 47, and the second rear outlet 48 are closed.

As shown in FIG. 1 , the aspirator 60 is installed on the upper surface 40b of the case 40 . See Figures 3 and 4. The aspirator 60 includes an aspirator main body 61 that is inserted into the case hole 41 and into which the air inside the case 40 flows, and the case 40 from the tip of the aspirator main body 61. A diffuser 62 extending along the upper surface 40b of the aspirator and discharging air passing through the aspirator body 61, and a substantially cylindrical nozzle 63 inserted into the aspirator body 61 ) is provided.

The tip of the tube 71 is connected to the end of the nozzle 63, and the end of the tube 71 faces the compartment Vi. Inside the tube 71, a temperature sensor 72 for detecting the temperature inside the cabin Vi is provided.

A part of the air in the case 40 flows from the case hole 41 to the aspirator main body 61 and flows out from the diffuser 62 to the outside. At this time, a negative pressure is generated at the tip of the nozzle 63 by the flow of outflow air flowing out from the inside of the case 40 . Air in the compartment Vi is sucked in by the generated negative pressure. The sucked air passes through the tube 71 and the nozzle 63 and flows out from the diffuser 62 to the outside. A temperature sensor 72 is installed inside the tube 71, and the temperature inside the compartment Vi can be detected from the temperature of the air passing through the tube 71.

The temperature of the cabin Vi detected by the temperature sensor 72 (temperature of the air inside the cabin) is input to a control device (not shown), calculated together with a physical quantity input from another temperature sensor or device, and the air conditioner 10 ) is reflected in the temperature control of

The air conditioner 10 described above achieves the following effects.

See Figures 2 and 4. The air blown to the flow path 50 by the blower 11 passes through the evaporator 23 and flows into the first flow path 51 and the second flow path 52 . In the heating mode, hot water is passed through the hot water heater 24a, and electric power is applied to the electric heater 24b. Then, the first outlets 42, 43, 47 are blocked by the first opening and closing doors 32, 33, and 37, and the second outlets 44 to 46 are blocked by the second opening and closing doors 34 to 36 and 38. 48), when an ejection mode in which either one is released is selected, the air flowing into the second flow path 52 is heated by the heater 24 (the hot water heater 24a and the electric heater 24b) to generate warm air. and is taken out to the compartment Vi from any one of the second outlets 44 to 46 and 48. In addition, the air that has flowed into the first flow path 51 is heated by the heater 24 (the hot water heater 24a and the electric heater 24b) to become warm air, but passes through the first air outlets 42, 43, and 47 to the vehicle compartment. (Vi) is prevented from being taken out, and fills the first flow path 51. In particular, the air filled in the first flow path 51 may be excessively heated by the heating element of the electric heater 24b.

However, in this embodiment, the air of the first flow path 51 flows out into the compartment Vi via the case hole 41 and the aspirator 60 provided in the portion facing the first flow path 51. As a result, it is possible to suppress heat around the heater 24 from staying in the first flow path 51 . The effect of heat on the case 40 or the like caused by being filled with heat can be reduced, and the air conditioner 10 having a long product life can be provided.

When the high-temperature air rises to a lower relative mass than the surrounding air, it tends to collect above the first flow path 51 . Here, since the case hole portion 41 is formed in the upper surface 40b of the case 40, particularly high-temperature air can be easily discharged to the outside. The retention of heat can be suppressed efficiently.

However, the temperature of the air in the compartment Vi is lower than the temperature of the heated air passing through the second flow path 52 . When the high-temperature air remaining in the first flow path 51 transfers heat to the case 40, the amount of heat dissipated to the air in the compartment Vi via the opposing wall portion 40a passes through the partition wall 25 to the second flow path. It is more than the amount of heat dissipated to the air of (52). For this reason, the high-temperature air remaining in the first flow passage 51 has a temperature imbalance depending on the location, and the temperature of the air near the partition wall 25 is relatively higher than that of the air near the opposing wall portion 40a. do. Here, by providing the case hole portion 41 at a position closer to the partition wall 25 than the opposing wall portion 40a, higher temperature air can be released and heat retention can be effectively suppressed.

In addition, the air conditioner 10 is generally set to blow out more air to the front seat S1 than to the rear seat S3, and the first front seat flow passage 51a is the largest. The space volume is also larger than that of the passage 51b for one back seat. By providing the case hole 41 so as to face the first flow passage 51a for the front seat, high-temperature air can be prevented from staying in the large-volume space, and the retention of heat throughout the air conditioner can be effectively suppressed.

In addition, the defroster outlet 46 is formed only in the second flow passage 52 . That is, the aspirator 60 faces the first flow path 51, and the defroster outlet 46 is formed on the second flow path 52. Since the aspirator 60 faces one flow path and the defroster outlet 46 faces the other flow path, it is possible to suppress heat from being filled only in either flow path.

<Example 2>

Next, the air conditioner 10A according to the second embodiment will be described based on the drawings.

5 schematically shows an air conditioner 10A according to the second embodiment. In the temperature control unit 20A of the air conditioner 10A according to Example 2, the first flow path 51 facing the aspirator 60 is disposed on the right side, and the second flow path 52 is disposed on the left side. there is. Also, the air conditioner 10A does not have an air outlet to the rear seat. Further, the defroster air outlet 49 (first air outlet 49) and the defroster opening/closing door 39 (first opening/closing door 39) are provided in the first flow path 51. Further, the heater 84 is composed of only a hot water heater and does not have an electric heater.

Other basic configurations are the same as those of the air conditioner 10 according to the first embodiment (see FIG. 2). For parts common to Example 1, codes are diverted and detailed explanations are omitted.

The air conditioner 10A described above also achieves certain effects of the present invention.

In addition, the air conditioner according to the present invention is not limited to those shown in each embodiment. For example, it is also possible to combine each embodiment. It is also possible to configure the heater of the air conditioner shown in FIG. 2 with only a hot water heater, or to provide an air outlet to the back seat of the air conditioner shown in FIG. 5 .

Insofar as the actions and effects of the present invention are achieved, the present invention is not limited to the Examples.

The air conditioner of the present invention is very suitable for mounting in a passenger vehicle.

10, 10A: Vehicle air conditioner
23: evaporator
24, 84: heater
25: partition wall
26: first temperature control means
27: second temperature control means
32: first vent opening and closing door (first opening and closing door)
33: first foot opening and closing door (first opening and closing door)
37: first rear opening and closing door (first opening and closing door)
39: defroster opening and closing door (first opening and closing door)
40: case
40a: opposite wall portion
40b: upper surface
41: case hole
42: first vent outlet (first outlet)
43: first foot outlet (first outlet)
44: second vent outlet (second outlet)
45: 2nd foot outlet (2nd outlet)
46: defroster outlet (second outlet)
47: first rear air outlet (first air outlet)
48: second rear air outlet (second air outlet)
49: defroster outlet (first outlet)
50: Euro
51: 1st euro
51a: passage for the first front seat
51b: passage for the first rear seat
52: second euro
60: Aspirator
Vi: tea room
S1: front seat (front seat)
S3: Rear seat (rear seat)

Claims (4)

In a vehicle air conditioner (10; 10A) disposed in a vehicle cabin,
A case 40 having an air flow path 50 formed therein;
An evaporator 23 disposed in the flow path 50 to cool air;
A heater (24; 84) for heating the air passing through the evaporator (23);
A partition wall (25) capable of partitioning the flow path (50) and dividing the air passing through the heater (24; 84) into a first flow path (51) and a second flow path (52);
a first temperature control unit (26) installed in the first flow path (51) and regulating the temperature of the air flowing through the first flow path (51);
a second temperature control means (27) installed in the second flow path (52) and regulating the temperature of the air flowing through the second flow path (52);
A first air outlet (42, 43, 47; 49) formed in the case (40) to discharge air flowing through the first flow path (51);
A first opening and closing door (32, 33, 37; 39) capable of adjusting the amount of air blown out from the first air outlet (42, 43, 47; 49);
second air outlets 44 to 46 and 48 formed in the case 40 and discharging air flowing through the second flow path 52;
And a second opening and closing door (34 to 36, 38) capable of adjusting the amount of air blown out from the second outlet (44 to 46, 48),
The first opening/closing door (32, 33, 37; 39) can block the first outlet (42, 43, 47; 49),
In the case 40, a case hole 41 is installed at a portion facing the first flow path 51,
In this case hole portion 41, an aspirator 60 that sucks in the air in the cabin using outflow air flowing out from the case hole portion 41 and simultaneously flows out the outflow air and the sucked air in the cabin. is installed
Vehicle air conditioner. According to claim 1,
The case hole 41 is installed on the upper surface 40b of the case 40
Vehicle air conditioner. According to claim 1 or 2,
When the portion of the case 40 facing the partition wall 25 is the opposing wall portion 40a, the case hole portion 41 is larger than the opposing wall portion 40a to the partition wall 25. installed in close proximity to
Vehicle air conditioner. According to any one of claims 1 to 3,
The first flow path 51 includes a first flow path 51a through which air for blowing air to the front seat S1 of the cabin Vi flows, and air for blowing air to the back seat S3 of the cabin Vi. A first flow path 51b for the back seat is provided,
The case hole portion 41 is provided facing the first flow path 51a for the front seat.
Vehicle air conditioner.

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