Air conditioning system for electric vehicles

Abstract

To provide an air conditioning system for an electric vehicle which can cool an exothermic device in a power unit room without arranging an apparatus dedicated for cooling in the power unit room.SOLUTION: An air conditioning system 10 for an electric vehicle includes a wind direction change part 44 arranged in a case 30 of a HVAC unit 24. The wind direction change part 44 can change wind direction of a part of wind blowing from a Sirocco fan 32 into a condenser of a refrigeration cycle unit 26 in a power unit room 18 or a power unit 28.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an air conditioning system for electric vehicles.

Background Art

[0002] The following Patent Document 1 discloses an invention related to a vehicle air conditioner. In this vehicle air conditioner, when the air conditioner in the vehicle interior blows air in the outside air introduction mode, the internal air introduction rate can be reduced. Therefore, in the following prior art, the warm air heated by the heat in the power unit room is blown into the vehicle interior almost without being cooled.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when supplying warm air to the vehicle interior, the heat of the heat generating equipment that generates heat in the power unit room can be dissipated to the vehicle interior side as described above. However, when warm air is not supplied to the vehicle interior, it is considered that it becomes difficult to release the heat of the heat generating equipment in the power unit room.

[0005] In this regard, it is also conceivable to arrange dedicated equipment for cooling the heat generating equipment in the power unit room in the power unit room. In that case, it is considered that the space in the power unit room is eroded by this dedicated equipment.

[0006] In consideration of the above facts, an object of the present invention is to obtain an air conditioning system for electric vehicles that can cool the heat generating equipment in the power unit room without separately arranging dedicated cooling equipment in the power unit room. [Means for solving the problem]

[0007] The air conditioning system for electric vehicles according to claim 1 comprises: an outside air intake unit that connects the inside of a case constituting the outer shell of the air conditioning unit to the outside of the vehicle; a blower unit that is located inside the case and is driven to blow air into the vehicle interior from an air outlet provided in the case; and a wind direction changing unit provided in the case that can direct the airflow of a portion of the air blown from the blower unit towards a heat-generating device located in the power unit room. Furthermore, the airflow direction changing unit is provided in the case and has an opening that can be opened and closed, which allows communication between the inside of the case and the inside of the power unit room, and has an opening / closing door that can change the direction of the airflow toward the opening when the opening is open, and a heat exchanger capable of cooling and heating the air is arranged inside the case, and the opening / closing door is located between the air blower and the heat exchanger. .

[0008] According to the present invention as described in claim 1, the inside of the case constituting the outer shell of the air conditioning unit and the outside of the vehicle are connected at an outside air intake. Furthermore, a blower is arranged inside the case, and when this blower is driven, air is blown into the vehicle interior from an air outlet provided in the case.

[0009] By the way, in order to dissipate the heat generated by the heat-generating equipment in the power unit room, it is conceivable that dedicated equipment for cooling the heat-generating equipment could be placed inside the power unit room. However, in that case, it is conceivable that the space inside the power unit room would be encroached upon by this dedicated equipment.

[0010] In this invention, the air conditioning unit case is provided with a wind direction changing section, which allows a portion of the air blown from the air blower to be directed towards heat-generating equipment located in the power unit room.

[0011] Therefore, in this invention, a portion of the air blown from the air blower can remove heat from heat-generating equipment located in the power unit room.

[0013] Also,According to the present invention, the airflow direction changing unit is equipped with an opening / closing door, which can open and close an opening provided in the case of the air conditioning unit. When the opening is open, the inside of the case and the inside of the power unit room are connected, and the direction of a portion of the air blown from the blower is changed toward the opening.

[0016] Claim 2 The air conditioning system for electric vehicles according to the present invention described in claim 1 In the invention described above, the air blower is a turbo fan arranged axially in the longitudinal direction of the vehicle.

[0017] Claim 2 According to the present invention described herein, outside air introduced from the outside air intake can be pressurized and sent to the heat exchanger side by a turbo fan arranged axially in the longitudinal direction of the vehicle. Therefore, compared to a configuration that uses a sirocco fan as the air blower, it is possible to make the air conditioning system smaller in the longitudinal direction of the vehicle. [Effects of the Invention]

[0022] As described above, the air conditioning system for electric vehicles according to claim 1 has the excellent effect of being able to cool heat-generating equipment in the power unit room without having to place separate dedicated cooling equipment in the power unit room.

[0023] Also, The air conditioning system for electric vehicles according to the present invention has the excellent effect of increasing the likelihood that a portion of the air blown from the air blower will be blown into the power unit room.

[0025] Claim 2 The air conditioning system for electric vehicles according to the present invention, as described above, has the excellent effect of reducing the space required for installing the air conditioning unit. [Brief explanation of the drawing]

[0027] [Figure 1]It is a cross-sectional view taken in the vehicle width direction showing the configuration of the front part of a vehicle equipped with an air conditioning system for an electric vehicle according to the first embodiment. [Figure 2] It is a block diagram showing the hardware of an air conditioning system for an electric vehicle according to the first embodiment and its relationship with peripheral devices. [Figure 3] It is a block diagram showing the functional configuration of an air conditioning control device that forms part of an air conditioning system for an electric vehicle according to the first embodiment [Figure 4] It is a cross-sectional view taken in the vehicle width direction showing the configuration of the front part of a vehicle equipped with an air conditioning system for an electric vehicle according to the second embodiment.

Embodiments for Carrying Out the Invention

[0028] <First Embodiment> Hereinafter, a first embodiment of an air conditioning system for an electric vehicle according to the present invention will be described using FIGS. 1 to 3. Note that the arrow FR appropriately shown in each figure indicates the front side of the vehicle of "Vehicle 12", which is an electric vehicle equipped with the "Air Conditioning System 10 for Electric Vehicle" according to the present embodiment, the arrow UP indicates the upper side of the vehicle of Vehicle 12, and the arrow OUT indicates the outer side in the vehicle width direction of Vehicle 12.

[0029] First, the schematic configuration of the vehicle body 14 of the vehicle 12 will be described. A "Power Unit Room 18" is provided in the front part 16 that constitutes the front side of the vehicle of this vehicle body 14. And the Power Unit Room 18 and the "Cabin 22" are partitioned by a dash panel 20 that constitutes the rear side part of the front part 16 in the vehicle.

[0030] Also, inside the Power Unit Room 18, a part of the "HVAC (Heating Ventilation and Air Conditioning) Unit 24" as an air conditioning device that forms part of the air conditioning system 10 for an electric vehicle, the "Refrigeration Cycle Unit 26", and the "Power Unit 28" as a heat generating device are arranged.

[0031] More specifically, the HVAC unit 24 has an outer shell composed of a "case 30," and the front part of the vehicle is a blower unit 24A that houses a "sirocco fan 32" as an air blower. On the other hand, the rear part of the vehicle is an air conditioning unit 24B that houses an "evaporator 34" as a heat exchanger and a "heater core 36" as a heat exchanger.

[0032] The HVAC unit 24 is attached to the dash panel 20 via mounting members (not shown), with the blower unit 24A portion located in the power unit room 18 and the air conditioning unit 24B portion located in the passenger compartment 22.

[0033] In the blower unit 24A, the sirocco fan 32 is positioned in the front part of the case 30 with its axial direction oriented in the vertical direction of the vehicle. This sirocco fan 32 is driven by a motor or other drive unit (not shown), enabling it to blow outside air introduced from the "outside air intake duct 38," which serves as an outside air intake section provided in the case 30, to the air conditioning unit 24B.

[0034] The outside air intake duct 38 is cylindrical and extends from the front part of the case 30 towards the upper rear of the vehicle. The opening 38A at the upper end of the outside air intake duct 38 opens toward the "outside air intake port 42A" which is an outside air intake section provided in the cowl louver 42 that is positioned along the lower end of the windshield glass 40 of the vehicle 12.

[0035] On the other hand, in the air conditioning unit 24B, the evaporator 34 is located on the blower unit 24A side of the air conditioning unit 24B and is connected via piping (not shown) to a condenser (not shown) which is a heat-generating device that constitutes part of the refrigeration cycle unit 26. In the cooling mode of the HVAC unit 24, refrigerant (air conditioning gas) circulates between the evaporator 34 and the condenser via piping.

[0036] More specifically, the refrigerant discharged from the evaporator 34 is compressed by a compressor (not shown) and flows into the condenser in a high-temperature, high-pressure gaseous state. Then, air is blown towards the condenser from an opening (not shown) located on the front side of the front part 16 of the vehicle, which cools the refrigerant and causes it to liquefy.

[0037] On the other hand, the refrigerant liquefied in the condenser is vaporized by an expansion valve (not shown) and flows into the evaporator 34 in a low-temperature, low-pressure mist state, which removes heat from the gas around the evaporator 34.

[0038] The air blown from the blower unit 24A is cooled by the evaporator 34 and then blown out from the air duct 43 connected to the "air outlet 30A" located on the rear side of the case 30, thereby supplying cool air into the passenger compartment 22.

[0039] On the other hand, the heater core 36 is located on the vehicle compartment 22 side relative to the evaporator 34 and is connected via piping (not shown) to a hot water heater (not shown) capable of heating the water in the container using a PTC (Positive Temperature Coefficient) heating element or the like. In the heating mode of the HVAC unit 24, water, which is the heat transfer medium, circulates between the heater cores 36 via the piping.

[0040] More specifically, the water discharged from the heater core 36 flows into the hot water heater, where it is heated before flowing back into the heater core 36. The air blown from the blower unit 24A is then heated in the heater core 36 and blown out through the air duct 43, supplying warm air into the vehicle compartment 22.

[0041] The power unit 28 includes a motor (not shown) and a motor ECU (Electronic Control Unit) (not shown) that controls this motor, and provides driving force to the drive wheels 45 when the vehicle 12 is in motion.

[0042] In this embodiment, the electric vehicle air conditioning system 10 is equipped with a "wind direction changing unit 44," which is characterized by the fact that the wind direction changing unit 44 can change the direction of a portion of the air blown from the sirocco fan 32. The configuration of the wind direction changing unit 44 will be described in detail below.

[0043] As shown in Figure 2, the airflow direction changing section 44 includes a "flap door 48" as an opening and closing door, an air supply duct 50, and a door actuator 52. The flap door 48 is plate-shaped and is capable of opening and closing an "opening 54" provided in the lower wall portion 30B that constitutes the lower part of the case 30 on the vehicle side.

[0044] More specifically, the opening 54 is positioned between the sirocco fan 32 and the evaporator 34 in the vehicle's longitudinal direction, and the flap door 48 is supported by the lower wall portion 30B on the vehicle's rear side of the opening 54 so as to be rotatable around the vehicle's width. The flap door 48 is also designed to rotate when driven by a door actuator 52. When the flap door 48 is fully open, when viewed from the vehicle's vertical direction, the flap door 48 covers a portion of the opening 54, and when viewed from the vehicle's longitudinal direction, the flap door 48 overlaps with a portion of the sirocco fan 32. An air duct 50 is connected to the opening 54.

[0045] The air supply duct 50 consists of a main duct 50A and a branch duct 50B. The main duct 50A is cylindrical and extends in the vertical direction of the vehicle. The portion on the side of the opening 50A1 at its upper end is connected to the side of the opening 54, and the opening 50A2 at its lower end opens toward the power unit 28.

[0046] On the other hand, the branch duct 50B branches off from the main duct 50A and extends toward the front of the vehicle, and the opening 50B1 at its end opens toward the condenser of the refrigeration cycle unit 26.

[0047] The door actuator 52 includes a motor (not shown) whose output shaft is connected to the flap door 48, and a motor driver (not shown) that controls the motor. This motor driver controls the motor's operation based on control signals transmitted from an air conditioning ECU 54, which is mounted on the vehicle 12 and is part of the electric vehicle air conditioning system 10.

[0048] As shown in Figure 2, the air conditioning ECU 54 consists of a CPU (Central Processing Unit) 54A as a processor, ROM (Read Only Memory) 54B, RAM (Random Access Memory) 54C, storage 54D, communication I / F (Interface) 54E, and input / output I / F 54F. The CPU 54A, ROM 54B, RAM 54C, storage 54D, communication I / F 54E, and input / output I / F 54F are interconnected via a bus 54G so that they can communicate with each other.

[0049] The CPU 54A is designated as the central processing unit and is capable of executing various programs. Specifically, the CPU 54A reads programs from the ROM 54B and executes them using the RAM 54C as a working area. When the executable program stored in the ROM 54B is read by the CPU 54A and executed, the air conditioning ECU 54 is able to perform various functions as described later.

[0050] More specifically, ROM54B stores various programs and data. On the other hand, RAM54C can temporarily store programs or data as a working area.

[0051] Storage 54D consists of an HDD (Hard Disk Drive) or SSD (Solid State Drive) and stores various programs, including the operating system, and various data.

[0052] The communication interface 54E is an interface for communicating with various control devices, such as the main ECU (not shown), mounted on the vehicle 12, and uses a communication standard based on the CAN (Controller Area Network) protocol, for example.

[0053] The input / output interface 54F serves as an interface for the air conditioning ECU 54 to communicate with various devices installed in the vehicle 12. The air conditioning ECU 54 is connected to various devices described later via the input / output interface 54F, enabling them to communicate with each other. These devices may also be directly connected to the bus 54G.

[0054] The devices connected to the air conditioning ECU 54 include the aforementioned door actuator 52, air conditioning setting unit 58, and cabin temperature sensor 60. These devices function as part of the electric vehicle air conditioning system 10.

[0055] The air conditioning setting unit 58 transmits operation signals based on the operation of the vehicle occupants 12 to the air conditioning ECU 54, enabling the switching of the HVAC unit 24's cooling mode, heating mode, and fan mode, as well as the setting of the air conditioning temperature. The air conditioning setting unit 58 can utilize a dial switch, touch panel, or the like.

[0056] The cabin temperature sensor 60 is capable of measuring the temperature inside the cabin 22 and transmits a temperature signal based on this temperature to the air conditioning ECU 54. The temperature information inside the cabin 22 is temporarily stored in the storage 54D.

[0057] Next, the functional configuration of the air conditioner ECU 54 will be explained using Figure 3. The air conditioner ECU 54 functions as a collection of a temperature information acquisition unit 62, an air conditioning setting acquisition unit 64, and an actuator control unit 66, by having the CPU 54A read an execution program stored in the ROM 54B and execute it.

[0058] The temperature information acquisition unit 62 acquires temperature information inside the vehicle interior 22 based on the temperature signal input from the vehicle interior temperature sensor 60.

[0059] The air conditioning setting acquisition unit 64 determines whether the HVAC unit 24 is operating based on the operation signal input from the air conditioning setting unit 58, and also determines which mode the HVAC unit 24 is in based on its operating state: cooling mode, heating mode, or fan mode, and stores this information as air conditioning mode information.

[0060] The actuator control unit 66 controls the door actuator 52 based on the temperature information inside the vehicle compartment 22 acquired by the temperature information acquisition unit 62 and the air conditioning mode information acquired by the air conditioning setting acquisition unit 64.

[0061] Specifically, as shown in Figure 1, the actuator control unit 66 controls the door actuator 52 so that the opening 54 remains open when the HVAC unit 24 is in fan mode.

[0062] Furthermore, when the HVAC unit 24 is in cooling mode, the actuator control unit 66 controls the door actuator 52 so that the flap door 48 remains closed until the temperature inside the passenger compartment 22 reaches a predetermined temperature (for example, 28°C). When the temperature inside the passenger compartment 22 falls below the predetermined temperature, the actuator control unit 66 drives the door actuator 52 to open the flap door 48 and maintains this state.

[0063] Furthermore, when the HVAC unit 24 is in heating mode, the actuator control unit 66 controls the door actuator 52 so that it remains closed until the temperature inside the passenger compartment 22 reaches a predetermined temperature (for example, 18°C). When the temperature inside the passenger compartment 22 rises above the predetermined temperature, the actuator control unit 66 drives the flap door 48 with the door actuator 52 to open it and maintains this state.

[0064] Furthermore, the actuator control unit 66 is configured to maintain a closed state when the HVAC unit 24 is not operating.

[0065] (Operation and effects of this embodiment) Next, the operation and effects of this embodiment will be described.

[0066] In this embodiment, as shown in Figure 1, the inside of the case 30 that constitutes the outer shell of the HVAC unit 24 and the outside of the vehicle 12 are connected by an outside air inlet 42A and an outside air intake duct 38. A sirocco fan 32 is also located inside the case 30, and when this sirocco fan 32 is driven, air is blown into the vehicle compartment 22 from an air outlet 30A provided in the case 30.

[0067] By the way, in order to dissipate the heat generated by the heat-generating equipment in the power unit room 18, it is conceivable that dedicated equipment for cooling the heat-generating equipment could be placed inside the power unit room 18. However, in that case, it is conceivable that the space inside the power unit room 18 would be encroached upon by this dedicated equipment.

[0068] In this embodiment, the case 30 is provided with a wind direction changing unit 44, which allows a portion of the wind blowing from the sirocco fan 32 to be directed towards the condenser of the refrigeration cycle unit 26 and the power unit 28 located in the power unit room 18.

[0069] Therefore, in this embodiment, a portion of the air blown from the sirocco fan 32 can remove heat from the condenser and power unit 28 of the refrigeration cycle unit 26 located in the power unit room 18. Consequently, in this embodiment, the condenser and power unit 28 of the refrigeration cycle unit 26 in the power unit room 18 can be cooled without the need to place separate dedicated cooling equipment in the power unit room 18.

[0070] Furthermore, in this embodiment, the airflow direction changing unit 44 is equipped with a flap door 48, which can open and close an opening 54 provided in the case 30. When the opening 54 is open, the inside of the case 30 and the inside of the power unit room 18 are connected, and the air blown from the sirocco fan 32 hits the flap door 48, thereby changing the direction of a portion of the air blown from the sirocco fan 32 toward the opening 54.

[0071] Therefore, in this embodiment, the likelihood that a portion of the air blown from the sirocco fan 32 will enter the power unit room 18 can be increased.

[0072] <Second Embodiment> Next, an "air conditioning system 100 for electric vehicles" according to a second embodiment of the present invention will be described, mainly using Figure 4. Note that components common to the first embodiment will be denoted by the same reference numerals, and their descriptions will be omitted as appropriate.

[0073] In this embodiment, the first feature is that the "HVAC unit 102" as an air conditioning device is equipped with a "turbo fan 104" as a blower instead of a sirocco fan 32. The second feature is that the conditioned air can be used to heat the "battery pack 106" which is mounted on the vehicle 12.

[0074] Specifically, the turbo fan 104 is positioned on the front side of the case 30 with its axial direction oriented in the longitudinal direction of the vehicle. This turbo fan 104 is driven by a motor or other drive unit (not shown), enabling it to blow outside air introduced from the outside air intake duct 38 towards the rear of the vehicle.

[0075] In this embodiment, the evaporator 34 and heater core 36 are arranged in this order on the rear side of the turbo fan 104, and the flap door 48 and opening 54 are located on the rear side of the heater core 36.

[0076] On the other hand, the battery pack 106 consists of an aluminum battery case (not shown) that forms its outer shell, and a battery module arranged inside the battery case. The battery pack 106 can be heated by the "hot water unit 108".

[0077] The hot water unit 108 includes hot water piping 110 routed along the battery case and a hot water tank 112 located in the power unit room 18 and capable of supplying hot water to the hot water piping 110. This hot water unit 108 is capable of heating the battery pack 106 by circulating water heated by a heater (not shown) in the hot water tank 112 through the hot water piping 110 using a pump (not shown).

[0078] In this embodiment, the "airflow direction changing unit 114" includes the aforementioned flap door 48, a ventilation duct 115 connected to the opening 54, and a flap door 116 provided on the ventilation duct 115. The airflow direction changing unit 114 makes it possible to supply hot air and cold air from the HVAC unit 102 into the power unit room 18.

[0079] More specifically, the air supply duct 115 is composed of a hot air duct 118 and a cold air duct 120. The hot air duct 118 is cylindrical in shape and extends downward to the rear of the vehicle from the opening 54. The portion on the opening 118A side at its upper end is connected to the opening 54 side, and the opening 118B at its lower end opens toward the hot water tank 112.

[0080] On the other hand, the cold air duct 120 is composed of a main duct 120A and a branch duct 120B. The main duct 120A is cylindrical and extends from the hot air duct 118 toward the front of the vehicle, and an opening 120A1 provided at its end toward the front of the vehicle opens toward the condenser of the refrigeration cycle unit 26.

[0081] The branch duct 120B branches off from the main duct 120A and extends downwards towards the vehicle, and the opening 120B1 at its end opens toward the power unit 28.

[0082] The flap door 116 has basically the same configuration as the flap door 48 and is supported at the boundary between the warm air duct 118 and the cold air duct 120 so as to be rotatable around the vehicle width direction. This flap door 116 is driven to rotate by a door actuator (not shown) which has the same configuration as the door actuator 52. When the flap door 116 rotates, the air duct 115 can take two states: a first connected state in which opening 54 and opening 118B are connected and the warm air duct 118 and cold air duct 120 are separated, and a second connected state in which opening 54, opening 120A1 and opening 120B1 are connected and the warm air duct 118 is separated into opening 118A and opening 118B.

[0083] In this embodiment configured as described above, the actuator control unit 66 controls the door actuator 52 to maintain the open state when the HVAC unit 102 is in blower mode, and also controls the door actuator of the flap door 116 to maintain the second communication state.

[0084] Furthermore, when the HVAC unit 102 is in cooling mode, the actuator control unit 66 controls the door actuator 52 so that the flap door 48 remains closed until the temperature inside the passenger compartment 22 reaches a predetermined temperature. When the temperature inside the passenger compartment 22 falls below the predetermined temperature, the actuator control unit 66 drives the flap door 48 with the door actuator 52 to open it, and drives the flap door 116 with the corresponding door actuator to enter a second connected state, and maintains this state.

[0085] Furthermore, when the HVAC unit 102 is in heating mode, the actuator control unit 66 controls the door actuator 52 so that it remains closed until the temperature inside the passenger compartment 22 reaches a predetermined temperature. When the temperature inside the passenger compartment 22 rises above the predetermined temperature, the actuator control unit 66 drives the flap door 48 with the door actuator 52 to open it, and drives the flap door 116 with the corresponding door actuator to open it to the first connected state, and maintains this state.

[0086] In this embodiment with the above configuration, an evaporator 34 and a heater core 36 are arranged between the turbo fan 104 and the flap door 48, and the air blown from the turbo fan 104 is cooled by the evaporator 34 or heated by the heater core 36. Therefore, in this embodiment, cold air or warm air can be supplied into the power unit room 18. As a result, in this embodiment, the equipment in the power unit room 18 can be cooled and heated by the conditioned air.

[0087] Furthermore, in this embodiment, outside air introduced from the outside air inlet 42A and the outside air intake duct 38 can be pressurized and sent to the evaporator 34 and heater core 36 by a turbo fan 104, which is positioned axially in the vehicle's longitudinal direction. Therefore, compared to a configuration that uses a sirocco fan as the air blower, the HVAC unit 102 can be made smaller in the vehicle's longitudinal direction. Consequently, in this embodiment, the space required for installing the HVAC unit 102 can be reduced.

[0088] In addition, in this embodiment, a hot water unit 108 is mounted on the vehicle 12, and this hot water unit 108 can heat the battery pack 106 mounted on the vehicle. Therefore, in this embodiment, when the outside temperature is low, the battery pack 106 can be heated by the hot water unit 108, thereby suppressing a decrease in the function of the battery pack 106.

[0089] By the way, since the water inside the hot water unit 108 is not heated when the hot water unit 108 is started, it is preferable to heat the water inside the hot water unit 108 quickly in order to suppress a decrease in the function of the battery pack 106.

[0090] In this embodiment, when the air blown from the turbo fan 104 is heated by the heater core 36, a portion of this air can be directed to the hot water unit 106, thereby rapidly heating the water in the hot water unit 108. Therefore, in this embodiment, the temperature of the battery pack 106 mounted on the vehicle 12 can be rapidly increased, for example, when the outside temperature is low.

[0091] In the embodiment described above, the flap door 48 changed the direction of the wind blowing from the ventilation unit toward the opening 54, but a configuration may also be used in which fixed louvers provided around the opening 54 change the direction of the wind blowing from the ventilation unit toward the opening 54.

[0092] Furthermore, in the embodiment described above, the drive of each flap door was controlled by the air conditioning ECU 54, but a configuration in which the drive of each flap door is controlled by the occupants of the vehicle 12 using an operating device or the like can also be adopted. [Explanation of symbols]

[0093] 10. Air conditioning systems for electric vehicles 12 vehicles 18 Power Unit Room 22 Cabin 24 HVAC units (air conditioning equipment) 26 Refrigeration cycle unit (heat-generating equipment) 28 Power Units (Heat Generating Equipment) 30 cases 30A Air outlet 32 Sirocco fan (air blower) 34 Evaporator (heat exchanger) 36 Heater core (heat exchanger) 38. Outdoor air intake duct (outdoor air intake section) 42A Outside air inlet (outside air inlet) 44 Wind direction changing section 48. Flap door (opening / closing door) 54 Opening 100 Electric Vehicle Air Conditioning Systems 102 HVAC Unit (Air Conditioning System) 104 Turbo fan (air blower) 106 Battery Pack (Battery) 108 Hot water unit 114 Wind direction changing section

Claims

1. An outside air intake section that connects the inside of the case that constitutes the outer shell of the air conditioning unit to the outside of the vehicle, A ventilation unit is positioned inside the case and is driven so that it can blow air into the vehicle interior from an air outlet provided in the case. The case includes a wind direction changing unit that can direct the direction of a portion of the air blown from the air blowing unit toward heat-generating equipment located in the power unit room, It has, The wind direction changing unit is provided in the case and has an opening that can be opened and closed, which allows communication between the inside of the case and the inside of the power unit room, and includes an opening / closing door that can change the wind direction toward the opening when the opening is open. A heat exchanger capable of cooling and heating the air is arranged inside the case, and the opening / closing door is located between the air blower and the heat exchanger. Air conditioning system for electric vehicles.

2. The aforementioned air blower is a turbo fan positioned axially in the vehicle's longitudinal direction. The air conditioning system for an electric vehicle according to claim 1.

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