Air conditioning device for vehicle

Abstract

[Problem] To improve a support structure for a blower in a vehicle air-conditioning device and improve blowing performance. Technical means are as follows: an air conditioning device for a vehicle, comprising: an air conditioning case having a suction port; a heat exchanger that is disposed within the air-conditioning case and heats or cools the air introduced from the suction port; an air supply fan is arranged in the air conditioner shell; the air conditioner is characterized in that the air blower comprises an electric motor, the electric motor is provided with an output shaft, the free end side of the output shaft is fixedly provided with an air blowing fan, and a supporting part for supporting the electric motor on the air conditioner shell is arranged on the inner side of the air inlet shell and the outer side of the air inlet. A fixing portion is provided for fixing the cover member or the support portion of the electric motor to the intake housing.

Description

Technical Field

[0001] The invention relates to a vehicle air conditioning device. Background Art

[0002] The vehicle air conditioning device includes an air conditioning unit called HVAC (Heating Ventilation, and Air Conditioning). The air conditioning unit includes an air conditioning housing, and heats or cools the air introduced into the air conditioning housing and blows it into the vehicle interior. The air conditioning housing is equipped with an air supply fan, a heat exchanger (evaporator, heater core), an air mixing door, etc.

[0003] In the aforementioned air conditioning unit, there is a known device capable of setting an internal and external air double-layer mode, which allows internal air and external air to flow into the air conditioning housing separately. Such an air conditioning unit divides the interior of the air conditioning housing into a first layer (e.g., an upper layer) and a second layer (e.g., a lower layer) by a partition wall. In the internal and external air double-layer mode, one of the first layer and the second layer becomes an internal air flow path, and the other becomes an external air flow path.

[0004] Furthermore, in the air conditioner housing, an air supply fan is provided in an air inlet portion provided with an internal air inlet and an external air inlet. The air supply fan includes: an air supply fan, which is coaxially provided with a first fan for supplying air to the first layer and a second fan for supplying air to the second layer; and an electric motor, which rotates the air supply fan via an output shaft (see Patent Document 1 below). Prior art literature Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2019-119419 Summary of the invention Technical problem to be solved by the invention

[0006] When focusing on the support structure of the blower in the aforementioned air conditioning unit, the blower fan is mounted relative to the output shaft protruding in one direction from the main body of the electric motor, but the blower fan is not supported at any part except the output shaft of the electric motor in the air inlet portion of the air conditioning housing. Therefore, the blower fan is in a state where only the main body side of the electric motor is cantilever-supported on the air conditioning housing, and the front end side of the output shaft is a free end, on which the blower fan is mounted.

[0007] In an air conditioning unit having such a support structure for a blower, the electric motor is heavier than the blower fan, so the resonance of the main body of the electric motor needs to be considered for the vibration accompanying the rotation of the blower fan and the vibration of the vehicle, and in order to rotate the blower fan mounted on the free end side of the output shaft in a stable state, weight restrictions and rotation speed restrictions are set for the electric motor and the blower fan. These restrictions have become an obstacle to improving the air supply performance of the air conditioning unit.

[0008] The present invention is proposed to address the above situation. That is, the technical problem of the present invention is to improve the support structure of the blower in the vehicle air conditioner and enhance the air supply performance of the vehicle air conditioner. Technical solutions adopted to solve technical problems

[0009] In order to solve the above technical problems, the vehicle air conditioning device of the present invention includes the following structure. A vehicle air conditioning device comprises: an air conditioning housing having an air inlet; a heat exchanger arranged in the air conditioning housing and heating or cooling the air introduced from the air inlet; a blower equipped with an air supply fan in the air conditioning housing; and an air intake housing covering the air inlet, characterized in that the blower comprises an electric motor having an output shaft with the air supply fan fixed on a free end side, a supporting portion for supporting the electric motor to the air conditioning housing is provided on the inner side of the air intake housing and the outer side of the air inlet, and a cover member of the electric motor or a fixing portion for fixing the supporting portion to the air intake housing is provided. Effects of the Invention

[0010] According to the vehicle air conditioner of the present invention having the above-mentioned features, the support structure of the blower can be improved, thereby enhancing the air blowing performance of the vehicle air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an explanatory diagram of a vehicle air conditioning device according to an embodiment of the present invention. Figure 2 It is a partial cross-sectional view showing an air introduction portion of a vehicle air conditioner. Figure 3 It is an explanatory diagram (side view) showing a cover member and a support portion of an electric motor in the blower. Figure 4 It is an explanatory diagram (exploded perspective view) showing a cover member and a support portion of an electric motor in the blower. DETAILED DESCRIPTION

[0012] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same reference numerals in different drawings represent parts with the same functions, and repeated descriptions in the drawings will be appropriately omitted.

[0013] like Figure 1 to Figure 3 As shown, the vehicle air conditioning device 1 includes an air intake portion 1A and a temperature adjustment air supply portion 1B relative to the air conditioning housing 100, the air intake portion 1A is provided with an external air intake port 2 and an internal air intake port 3 (3A, 3B), and the temperature adjustment air supply portion 1B is provided with a first blow-out portion 4, a second blow-out portion 5, and a third blow-out portion 6. Here, the first blow-out portion 4 is, for example, a defrost blow-out port, the second blow-out portion 5 is, for example, a face blow-out port, and the third blow-out portion 6 is, for example, a foot blow-out port 6A, a foot blow-out port 6B for a rear seat, a face blow-out port 6C for a rear seat, and the like.

[0014] The air introduction part 1A includes an air supply fan 10 and an electric motor 11 constituting a blower. The air supply fan 10 includes a first fan 10A and a second fan 10B driven by the electric motor 11 and coaxially rotated by an output shaft 11A of the electric motor 11. In addition, at the air introduction part 1A, a pair of suction ports 12 of the first fan 10A and suction ports 13 of the second fan 10B are respectively provided in opposite directions along the output shaft 11A.

[0015] In addition, the air introduction part 1A includes air intake housings 20 and 21. The air intake housings 20 and 21 are provided in a manner to cover a pair of suction ports 12 and 13 of the air supply fans 10 (the first fan 10A and the second fan 10B), respectively, and an internal air introduction port 3A is provided in one of the air intake housings 20, and an internal air introduction port 3B is provided in the other of the air intake housings 21. In addition, an external air introduction port 2 is provided in a manner spanning the two air intake housings 20 and 21. When mounted on a vehicle, the external air introduction port 2 is provided in a manner opening toward the front side of the vehicle, and the two internal air introduction ports 3A and 3B are provided in a manner opening toward the left and right sides in the width direction of the vehicle, respectively.

[0016] In the air introduction section 1A, an intake valve 22 is provided inside the intake housing 20, and an intake valve 23 is provided inside the intake housing 21. The intake valves 22 and 23 are rotary dampers, each including a rotating shaft 22A and 23A, and close the external air introduction port 2 and open the internal air introduction ports 3A and 3B by rotating in one direction around the rotating shaft 22A and 23A, and open the external air introduction port 2 and close the internal air introduction ports 3A and 3B by rotating in the other direction around the rotating shaft 22A and 23A, thereby selectively introducing internal and external air relative to the suction ports 12 and 13.

[0017] The temperature-adjusting air supply unit 1B includes a partition wall 110 that divides the inside of the air-conditioning housing 100 into a first layer 111 and a second layer 112. Moreover, the temperature-adjusting air supply unit 1B includes a filter 120 that purifies the air passing through the first layer 111 and the second layer 112, a first heat exchanger (cooler) 121 that cools the air passing through the first layer 111 and the second layer 112, and a second heat exchanger (heater) 122 that heats the air passing through the first layer 111 and the second layer 112 in a manner that straddles the partition wall 110.

[0018] An air supply flow path is formed inside the air-conditioning shell 100 of the temperature regulating air supply section 1B, which passes through the first layer 111 or the second layer 112 to reach the aforementioned blowing section (the first blowing section 4, the second blowing section 5, the third blowing section 6). A first air mixing door 111A is provided on the first layer 111, and a second air mixing door 112A is provided on the second layer 112.

[0019] The blower unit includes a first door 4A for opening and closing the first blower unit 4 , a second door 5A for opening and closing the second blower unit 5 , and a wind direction switching door 60 for switching the wind direction of the foot blower outlet 6A in the third blower unit 6 .

[0020] The flow of air in the air intake section 1A and the temperature adjustment air supply section 1B is described. The air sucked in from the air inlet 12 by the first fan 10A flows along the intake path of the air intake section 1A, enters the first layer 111, passes through the filter 120 and the first heat exchanger (cooler) 121 provided in the air conditioning housing 100, and then switches the air supply flow path through the first air mixing door 111A.

[0021] At this time, in one state, the first air mixing door 111A supplies air to the first blow-out section 4, the second blow-out section 5 or the third blow-out section 6 without passing through the second heat exchange section 122. In another state, the first air mixing door 111A supplies air to the first blow-out section 4, the second blow-out section 5 or the third blow-out section 6 via the second heat exchange section 122.

[0022] In contrast, the air sucked in from the air inlet 13 by the second fan 10B flows along the inlet path of the air inlet portion 1A, enters the second layer 112, passes through the filter 120 and the first heat exchanger 121 arranged in the air-conditioning casing 100, and then switches the air supply path through the second air mixing door 112A.

[0023] At this time, the second air mixing door 112A, in one state, supplies air to the first blow-out section 4, the second blow-out section 5 or the third blow-out section 6 without passing through the second heat exchange section 122, and the second air mixing door 112A, in another state, supplies air to the first blow-out section 4, the second blow-out section 5 or the third blow-out section 6 via the second heat exchange section 122.

[0024] Then, the internal air introduction mode, the external air introduction mode, and the internal and external air double-layer mode (hereinafter referred to as the double-layer mode) are switched according to the operation mode of the intake doors 22 and 23 in the air introduction unit 1A.

[0025] The states of the intake valves 22 and 23 are: internal gas introduction mode, external gas introduction mode and double-layer mode. In the internal gas introduction mode, the external gas introduction port 2 is blocked by the shielding parts of the intake valves 22 and 23, and the internal gas introduction ports 3A and 3B are opened; in the external gas introduction mode, the internal gas introduction ports 3A and 3B are blocked by the shielding parts of the intake valves 22 and 23, and the external gas introduction port 2 is opened; in the double-layer mode, the intake valve 22 blocks the internal gas introduction port 3A through the shielding part and opens the external gas introduction port 2, and the intake valve 23 blocks the external gas introduction port 2 through the shielding part and opens the internal gas introduction port 3B.

[0026] In the internal air introduction mode, the air sucked from the suction port 12 by the first fan 10A and the air sucked from the suction port 13 by the second fan 10B are both internal air, and therefore, the internal air flows through the first layer 111 and the second layer 112 in the temperature control air supply unit 1B. In addition, in the external air introduction mode, the air sucked from the suction port 12 by the first fan 10A and the air sucked from the suction port 13 by the second fan 10B are both external air, and therefore, the external air flows through the first layer 111 and the second layer 112 in the temperature control air supply unit 1B.

[0027] Moreover, in the double-layer mode, one of the air sucked in from the suction port 12 by the first fan 10A and the air sucked in from the suction port 13 by the second fan 10B is internal air and the other is external air. Therefore, the external air can flow only into the first layer 111 and the internal air can flow only into the second layer 112.

[0028] Here, the electric motor 11 driving the air supply fan 10 (the first fan 10A and the second fan 10B) is arranged on the first layer 111 side of the first layer 111 and the second layer 112. Figure 2 As shown, the electric motor 11 is disposed on the first fan 10A side of the first fan 10A and the second fan 10B.

[0029] The air conditioning case 100 is provided with a cooling flow path 200 for cooling the electric motor 11. The cooling flow path 200 introduces air between the filter 120 and the first heat exchanger 121 in the first layer 111 of the air conditioning case 100 into the electric motor 11.

[0030] Thus, in the aforementioned two-layer mode, in the first layer 111 where only the outside air flows, the air on the upstream side of the first heat exchanger 121 can be sent to the cooling flow path 200, and the air sent from the cooling flow path 200 to the electric motor 11 is sucked from the suction port 12 by the first fan 10A and returns only to the first layer 111. Thus, in the two-layer mode, the inside air flowing in the second layer 112 is not mixed with the air sent to the electric motor 11.

[0031] At this time, the cooling flow path 200 forms a circulation flow path that sends the external air sucked from the suction port 12 by the first fan 10A to the electric motor 11 via the filter 120 , so that the external air purified by removing foreign matter etc. can circulate, and the electric motor 11 can be cooled effectively.

[0032] like Figure 3 and Figure 4 As shown, the cooling flow path 200 passes through a branch opening 200A, which is connected to the space between the filter 120 and the first heat exchanger 121 in the first layer 111 of the air conditioning housing 100 and is provided outside the end of the first heat exchanger 121. In addition, the cooling flow path 200 is formed by a cover member 210 that covers the back side of the electric motor 11 and extends to the branch opening 200A.

[0033] like Figure 4 As shown, the cover member 210 can be formed by a first cover member 211 and a second cover member 212. The first cover member 211 is a member covering the back side of the electric motor 11, and the second cover member 212 is a member covering the side of the electric motor 11. The first cover member 211 and the second cover member 212 include split flow path frames 211A and 212A for forming the cooling flow path 200. The first cover member 211 and the second cover member 212 are combined to make these split flow path frames 211A and 212A become one, so that the cooling flow path 200 is formed therein. In addition, the cooling flow path 200 may not be formed by such split flow path frames 211A and 212A but may be installed as an integral frame.

[0034] The cover member 210 after the first cover member 211 and the second cover member 212 are combined is installed on the air conditioning housing 100 via the support portion 213 forming the suction port 12. The support portion 213 includes a connection port 213A connected to the ends of the split flow path frames 211A and 212A, and the split flow path frames 211A and 212A are connected to the branch opening 200A via the connection port 213A.

[0035] The air introduced into the first layer 111 of the air conditioning case 100 from the air inlet 12 passes through the filter 120 , is taken out from the branch opening 200A before entering the first heat exchanger 121 , and is sent to the back side of the electric motor 11 through the cooling flow path 200 .

[0036] Here, the support portion 213 is provided on one side of a pair of air inlets 12, 13, namely, the air inlet 12 side, on the inner side of the air intake housing 20 and the outer side of the air inlet 12, and supports the electric motor 11 to the air conditioning housing 100. Moreover, the front end side of the output shaft 11A of the electric motor 11 supported by the support portion 213 is a free end, and the air supply fan 10 (the first fan 10A and the second fan 10B) is installed on the free end side. In addition, in the example shown in the figure, the support portion 213 is composed of a frame body capable of introducing air. However, the structure of the support portion 213 for supporting the electric motor 11 to the air conditioning housing 100 is not limited to this, and can also be any method.

[0037] In order to firmly fix the electric motor 11 at multiple locations, a fixing portion 30 is provided to fix the cover member 210 (first cover member 211) of the electric motor 11 to the air intake housing 20. The fixing portion 30 is composed of a protrusion 31 that protrudes from the cover member 210 (first cover member 211) toward the inner side of the air intake housing 20 and a fastening member 32 that fastens the protrusion 31 to the air intake housing 20. In addition, in the example shown in the figure, the protrusion 31 is provided on the cover member 210 (first cover member 211), but the structure of the fixing portion 30 that fixes the cover member 210 and the air intake housing 20 is not particularly limited to this. In addition, the fixing portion 30 may also fix the support portion 213 to the air intake housing 20.

[0038] By providing such a fixing portion 30, the electric motor 11 of the blower is fixed to the air conditioning housing 100 via the support portion 213, and is fixed to the air intake housing 20 via the fixing portion 30. Thus, even in a state where the output shaft 11A of the electric motor 11 is set as a free end and the blower fan 10 (the first fan 10A and the second fan 10B) is mounted thereon, by fixing the electric motor 11 as a heavy object at multiple locations, the vibration resistance can be improved, and the blower as a whole can be supported in a stable state.

[0039] In addition, by supporting the electric motor 11 as a heavy object at multiple locations to improve the vibration resistance, the weight limit and rotation speed limit of the electric motor 11 and the air supply fan 10 can be relaxed, and a large air supply fan 10 can be used to increase the air supply capacity of the blower by rotating the high-output electric motor 11 at high speed, thereby improving the air supply performance of the vehicle air conditioning device.

[0040] In particular, in a vehicle air conditioning device 1 in which a pair of air intakes 12 and 13 are coaxially arranged, an air supply fan 10 (a first fan 10A and a second fan 10B) is arranged between the pair of air intakes 12 and 13, a support portion 213 is provided on one side of the pair of air intakes 12 and 13 and is composed of a frame for inhaling air, and has a double-layer mode of inner and outer gases, the structure in which the main body side of the electric motor 11 is cantilevered by the support portion 213 can be adopted, while improving the vibration resistance and enhancing the air supply performance.

[0041] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the specific structure is not limited to these embodiments, and even changes in design that do not deviate from the scope of the purpose of the present invention are also included in the present invention. In addition, as long as there are no special contradictions or problems in the purpose and structure of the above-mentioned embodiments, they can be combined using mutual technologies. Explanation of symbols

[0042] 1 vehicle air conditioning device; 1A air intake portion; 1B temperature regulating air supply portion; 2 external gas introduction port; 3 (3A, 3B) internal gas introduction port; 4 first blowing part; 4A first door; 5 second blowing portion; 5A second door; 6 The third blowing part; 6A The foot blowing outlet; 6B The foot blowing outlet of the rear seat; 6C rear seat face air outlet; 60 wind direction switch door; 10 air supply fan; 10A first fan; 10B second fan; 11 electric motor; 11A output shaft; 12, 13 suction port; 20, 21 intake housing; 22, 23 intake valve; 22A, 23A rotating shaft; 100 air conditioning housing; 110 partition wall; 111 first floor; 112 second floor; 111A a first air mixing door; 112A a second air mixing door; 120 filter; 121 first heat exchange part; 122 second heat exchange part; 200 cooling flow path; 200A branch opening; 210 cover component; 211 first cover component; 212 second cover component; 211A, 212A divided flow path frame; 213 support portion; 213A connection port; 30: fixing portion; 31: protruding portion; 32: fastening member.

Claims

1. A vehicle air conditioning device, comprising: an air conditioner housing having a suction port; a heat exchanger disposed in the air conditioning housing and heating or cooling the air introduced from the suction port; A blower, which is equipped with an air supply fan in the air conditioning housing; as well as The air intake housing, which covers the suction port, is characterized in that The blower includes an electric motor having an output shaft to which the blower fan is fixed at a free end side. A support portion for supporting the electric motor on the air conditioning case is provided inside the air intake case and outside the air inlet. Furthermore, a fixing portion is provided for fixing the cover member of the electric motor or the support portion to the intake housing.

2. The vehicle air conditioning device according to claim 1, characterized in that: The suction ports are coaxially arranged in pair. The air supply fan is arranged between the pair of suction ports. The support portion is provided on one side of the pair of suction ports.

3. The vehicle air conditioning device according to claim 1, characterized in that: The fixing portion is composed of a protrusion that protrudes from the cover member or the support portion toward the inner side of the intake housing, and a fastening member that fastens the protrusion to the intake housing.

4. The vehicle air conditioning device according to claim 1, characterized in that: The air conditioning housing has a first layer and a second layer divided by a partition wall, The air supply fan includes a first fan for supplying air to the first layer and a second fan for supplying air to the second layer, which are coaxially provided.

5. The vehicle air conditioning device according to claim 1, characterized in that: An intake valve for selectively introducing external air or internal air into the suction port is provided inside the intake housing.

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