WO2020121923A1 - Vehicle heat exchange system - Google Patents

Abstract

A heat exchange system (10) comprises a heat exchanger (35), a radiator (25), a linking member (50), and a shutter device (60). The heat exchanger is used as a heat exchanger that absorbs heat from air in a heat exchange cycle of an air conditioning device of a vehicle. The radiator is used in a cooling system that cools a heat producing source of the vehicle. The linking member thermally links the heat exchanger and the radiator. The shutter device can switch between supplying and cutting off air to the heat exchanger and the radiator.

Description

Vehicle heat exchange system Cross-reference of related applications

This application is based on Japanese Patent Application No. 2018-234415 filed on December 14, 2018 and Japanese Patent Application No. 2019-207741 filed on November 18, 2019. , Claiming the benefit of its priority, and the entire contents of that patent application are incorporated herein by reference.

The present disclosure relates to a vehicle heat exchange system.

In the vehicle, the air introduced into the engine room through the grill opening is supplied to the outdoor heat exchanger and radiator of the vehicle air conditioner. A heat medium used in a refrigeration cycle or a heat pump cycle of a vehicle air conditioner flows inside the outdoor heat exchanger. The outdoor heat exchanger exchanges heat between the heat medium flowing inside and the air to release the heat of the heat medium to the air or absorb the heat of the air to the heat medium. Cooling water for cooling the engine of the vehicle flows through the radiator. The radiator radiates the heat of the cooling water to the air by exchanging heat between the cooling water flowing inside and the air.

Also, some vehicles are equipped with a shutter device that can temporarily block the flow of air from the grill opening to the engine room. As a heat exchange system including the outdoor heat exchanger and the radiator including such a shutter device, for example, there is a vehicle heat exchange system described in Patent Document 1 below.

The heat exchange system described in Patent Document 1 includes an air blower for blowing the air introduced from the grille opening to the outdoor heat exchanger and the radiator. The blower normally rotates in the forward direction so that the air introduced from the grill opening flows in the direction toward the outdoor heat exchanger and the radiator. In the heat exchange system described in Patent Document 1, the outdoor heat exchanger is used as the evaporator of the heat pump cycle. When the outdoor heat exchanger is used as an evaporator, water contained in air is condensed on the outer surface of the outdoor heat exchanger, which may cause frost to adhere to the outer surface of the outdoor heat exchanger. In the heat exchange system described in Patent Document 1, when frost adheres to the outdoor heat exchanger, a defrosting operation for removing frost from the outdoor heat exchanger is performed. Specifically, in this heat exchanger system, as the defrosting operation, the grill shutter is set to the closed state and the blower device is rotated in the reverse direction. Thus, the air warmed by the radiator is blown to the outdoor heat exchanger to remove the frost attached to the outdoor heat exchanger.

Japanese Patent No. 3600164

As in the heat exchange system described in Patent Document 1, in the case of a configuration in which the blower device is rotated in reverse to transfer the heat of the radiator to the outdoor heat exchanger, electric power is required to rotate the blower device in reverse. , The power consumption of the vehicle may increase.
In addition, such a problem is not limited to the heat exchange system that drives the blower during the defrosting operation, but also the heat exchange system that drives the blower when performing heat exchange between the outdoor heat exchanger and the radiator. Is a common issue.

An object of the present disclosure is to provide a vehicle heat exchange system capable of reducing power consumption.

A heat exchange system according to an aspect of the present disclosure includes a heat exchanger, a radiator, a connecting member, and a shutter device. The heat exchanger is a heat exchanger that is used in a heat exchange cycle of an air conditioner of a vehicle and absorbs heat from air or radiates heat to air, and a heat medium that circulates in the heat exchange cycle and from inside the engine room from the front of the vehicle. Heat exchange with the air introduced into the. The radiator is used in a cooling system that cools the heat source of the vehicle, and heat is exchanged between the cooling water for cooling the heat source mounted on the vehicle and the air introduced from the front of the vehicle into the engine room. I do. The connecting member thermally connects the heat exchanger and the radiator. The shutter device can switch supply and cutoff of air to the heat exchanger and the radiator.

According to this configuration, since the heat exchanger and the radiator are thermally connected to each other via the connecting member, by shutting off the air supply to the heat exchanger and the radiator by the shutter device, Heat can be efficiently transferred to and from the radiator. Therefore, even when it is necessary to rotate the blower in order to exchange heat between the heat exchanger and the radiator, it is possible to reduce the rotation speed of the blower. Further, the blower can be stopped depending on the conditions. Therefore, power consumption can be reduced.

FIG. 1 is a block diagram showing a schematic configuration of a vehicle heat exchange system of the first embodiment. FIG. 2 is a diagram schematically showing a schematic configuration of the vehicle of the first embodiment. FIG. 3 is a block diagram showing an operation example of the vehicle heat exchange system of the first embodiment. FIG. 4 is a perspective sectional view showing a sectional structure of the radiator, the outdoor heat exchanger, and the fins of the first embodiment. FIG. 5 is a graph showing the energy consumption of the vehicle of the first embodiment in comparison between the case where the shutter device is in the open state and the case where the shutter device is in the closed state. FIG. 6 is a block diagram showing an electrical configuration of the vehicle heat exchange system of the first embodiment. FIG. 7 is a flowchart showing a procedure of processing executed by the air conditioning ECU of the first embodiment. FIG. 8 is a flowchart showing a procedure of processing executed by the cooling ECU of the first embodiment. FIG. 9 is a flowchart showing a procedure of processing executed by the shutter ECU of the first embodiment. FIG. 10 is a graph showing the relationship between the heat transfer amount between the radiator and the outdoor heat exchanger of the first embodiment and the air flow rate of the air passing through them. FIG. 11 is a flowchart showing a procedure of processing executed by the shutter ECU of the second embodiment. FIG. 12 is a flowchart showing a procedure of processing executed by the air conditioning ECU of the third embodiment. FIG. 13: is a figure which shows typically the schematic structure of the vehicle of other embodiment.

Hereinafter, an embodiment of a vehicle heat exchange system will be described with reference to the drawings. In order to facilitate understanding of the description, the same reference numerals are given to the same constituent elements in each drawing as much as possible, and overlapping description will be omitted.
<First Embodiment>
First, a first embodiment of the vehicle heat exchange system 10 shown in FIG. 1 will be described. The vehicle on which the heat exchange system 10 of the present embodiment is mounted is an electric vehicle or a plug-in hybrid vehicle that travels based on the power of the electric engine. As shown in FIG. 1, the vehicle heat exchange system 10 of the present embodiment includes a cooling system 20 and a heat pump cycle 30.

The cooling system 20 is a system that cools those elements by circulating cooling water through an electric motor 21, a battery 22, and an inverter 23 mounted on a vehicle. As described above, the heat sources to be cooled by the cooling system 20 of the present embodiment are the electric motor 21, the battery 22, and the inverter 23.

The electric motor 21 is driven based on the electric power supplied from the battery 22. The vehicle runs by transmitting the power of the electric motor 21 to the wheels of the vehicle. Further, the electric motor 21 performs regenerative power generation based on the kinetic energy transmitted from the wheels when the vehicle stops. The electric power of the electric motor 21 generated by this regenerative power generation charges the battery 22.

The battery 22 is a rechargeable secondary battery such as a lithium-ion battery. The electric power charged in the battery 22 is supplied to not only the electric motor 21 but also various electronic devices mounted on the vehicle.
The inverter 23 converts the DC power charged in the battery 22 into AC power and supplies the AC power to the electric motor 21. Further, the inverter 23 converts the AC power generated by the regenerative power generation of the electric motor 21 into DC power and charges the battery 22.

The cooling system 20 includes a pump 24 and a radiator 25. The cooling system 20 has a structure in which an electric motor 21, a battery 22, a pump 24, an inverter 23, and a radiator 25 are annularly connected by a pipe. In the cooling system 20, cooling water circulates through each element connected via piping.

The pump 24 is a so-called electric pump that is driven based on the electric power supplied from the battery 22. The pump 24 circulates the cooling water in each element of the cooling system 20 by pumping the cooling water circulating in the cooling system 20.
As shown in FIG. 2, the radiator 25 is arranged in the middle of an air passage Wa extending from a grille opening 41 provided in the front of the vehicle to the engine room 42. The radiator 25 exchanges heat between the cooling water flowing inside and the air introduced into the engine room 42 from the grille opening 41, thereby releasing the heat of the cooling water to the air to generate the cooling water. This is the part to be cooled.

As shown in FIG. 1, in the cooling system 20, the cooling water cooled in the radiator 25 circulates through the electric motor 21, the battery 22, and the inverter 23, so that the heat is absorbed by the cooling water. As a result, the electric motor 21, the battery 22, and the inverter 23 are cooled.

The heat pump cycle 30 is a system for heating or cooling the conditioned air that is blown into the passenger compartment of the vehicle air conditioner. In the present embodiment, the heat pump cycle 30 corresponds to the heat exchange cycle used in the air conditioner. As shown in FIG. 1, the heat pump cycle 30 includes a compressor 31, an indoor radiator 32, a first three-way valve 33, a first expansion valve 34, an outdoor heat exchanger 35, a second three-way valve 36, and a second expansion valve. 37 and an evaporator 38 are provided. The heat pump cycle 30 has a structure in which these elements are annularly connected by piping. In the heat pump cycle 30, the heat medium circulates through each element connected via piping. In FIG. 1, the pipes through which the heat medium flows when the heat pump cycle 30 is operating in the cooling mode for cooling the conditioned air are shown by solid lines, and the pipes through which the heat medium does not flow are shown by broken lines. Further, in FIG. 3, the pipes through which the heat medium flows when the heat pump cycle 30 is operating in the heating mode for heating the conditioned air are shown by solid lines, and the pipes through which the heat medium does not flow are shown by broken lines.

The compressor 31 sucks in and compresses the heat medium, and discharges the compressed heat medium to the indoor radiator 32.
The indoor radiator 32 is a part that heats the conditioned air by releasing the heat of the heat medium discharged from the compressor 31 to the conditioned air when the heat pump cycle 30 is operating in the heating mode. The heat medium that has passed through the indoor radiator 32 flows into the first three-way valve 33.

The first three-way valve 33 selectively flows the heat medium discharged from the indoor radiator 32 into either the flow passage W11 or the bypass flow passage W12. The flow path W11 is a flow path in which the first expansion valve 34 is arranged. The bypass flow passage W12 is a flow passage that bypasses the first expansion valve 34. As shown in FIG. 1, when the heat pump cycle 30 is operating in the cooling mode, the first three-way valve 33 operates so that the heat medium discharged from the indoor radiator 32 flows through the bypass flow passage W12. Further, as shown in FIG. 3, when the heat pump cycle 30 is operating in the heating mode, the first three-way valve 33 operates so that the heat medium discharged from the indoor radiator 32 flows through the flow path W11. ..

The first expansion valve 34 expands and reduces the pressure of the heat medium flowing from the indoor radiator 32 through the flow path W11 when the heat pump cycle 30 is operating in the heating mode.
The heat medium that has passed through the first expansion valve 34 by flowing through the flow path W11 or the heat medium that has bypassed the first expansion valve 34 by flowing through the bypass flow path W12 flows into the outdoor heat exchanger 35. As shown in FIG. 2, the outdoor heat exchanger 35 is arranged in the middle of the air passage Wa extending from the grille opening 41 to the engine room 42, similarly to the radiator 25. The outdoor heat exchanger 35 is arranged downstream of the radiator 25 in the air flow direction Da. When the heat pump cycle 30 is operating in the cooling mode as shown in FIG. 1, the outdoor heat exchanger 35 exchanges heat between the heat medium flowing through the inside thereof and the air, whereby the heat of the heat medium is exchanged. It functions as a condenser that radiates heat to the air to cool the heat medium. Further, as shown in FIG. 3, when the heat pump cycle 30 is operating in the heating mode, the outdoor heat exchanger 35 exchanges heat between the heat medium flowing through the inside of the heat exchanger 35 and the air, and It functions as an evaporator that heats the heat medium by absorbing the heat of the heat medium. The heat medium that has passed through the outdoor heat exchanger 35 flows into the second three-way valve 36.

The second three-way valve 36 selectively flows the heat medium discharged from the outdoor heat exchanger 35 into either the flow passage W21 or the bypass flow passage W22. The flow path W21 is a flow path in which the second expansion valve 37 and the evaporator 38 are arranged. The bypass flow passage W22 is a flow passage that bypasses the second expansion valve 37 and the evaporator 38. As shown in FIG. 1, when the heat pump cycle 30 is operating in the cooling mode, the second three-way valve 36 operates so that the heat medium discharged from the outdoor heat exchanger 35 flows through the flow path W21. Further, as shown in FIG. 3, when the heat pump cycle 30 is operating in the heating mode, the second three-way valve 36 causes the heat medium discharged from the outdoor heat exchanger 35 to flow into the bypass flow passage W12. Operate.

The second expansion valve 37 expands and reduces the pressure of the heat medium discharged from the outdoor heat exchanger 35 when the heat pump cycle 30 is operating in the cooling mode. The heat medium whose pressure has been reduced by the second expansion valve 37 flows into the evaporator 38. The evaporator 38 exchanges heat between the heat medium flowing inside and the conditioned air, thereby absorbing the heat of the conditioned air by the heat medium and cooling the conditioned air.

Next, an operation example of the heat pump cycle 30 will be specifically described.
As shown in FIG. 1, in the heat pump cycle 30, when operating in the cooling mode, the heat medium is “compressor 31→indoor radiator 32→outdoor heat exchanger 35→second expansion valve 37→evaporator. 38→compressor 31″. In this case, in the heat pump cycle 30, the high-temperature and high-pressure heat medium discharged from the compressor 31 flows into the indoor radiator 32. At this time, in the air conditioner, the conditioned air does not flow into the indoor radiator 32, so the heat medium flowing through the indoor radiator 32 flows into the outdoor heat exchanger 35 without exchanging heat with the conditioned air. ..

The outdoor heat exchanger 35 functions as a condenser when the heat pump cycle 30 operates in the cooling mode. That is, in the outdoor heat exchanger 35, the heat of the heat medium is released to the air by exchanging heat between the high-temperature and high-pressure heat medium flowing inside the air and the air, so that the heat medium is cooled. Is condensed.

The heat medium cooled in the outdoor heat exchanger 35 is depressurized to a low pressure through the second expansion valve 37 and then flows into the evaporator 38. In the evaporator 38, heat is exchanged between the low-pressure heat medium flowing inside the evaporator 38 and the conditioned air flowing outside thereof, so that the heat of the conditioned air is absorbed by the heat medium and the heat medium evaporates. The conditioned air is cooled by heat exchange between the conditioned air and the heat medium in the evaporator 38. The cooled air-conditioned air is blown into the vehicle interior to cool the vehicle interior. The heat medium evaporated in the evaporator 38 is sucked into the compressor 31 and compressed, and then recirculates through the heat pump cycle 30.

On the other hand, as shown in FIG. 3, in the heat pump cycle 30, when operating in the heating mode, the heat medium is “compressor 31→indoor radiator 32→first expansion valve 34→outdoor heat exchanger 35→ Compressor 31” flows in this order. In this case, in the heat pump cycle 30, the high-temperature and high-pressure heat medium discharged from the compressor 31 flows into the indoor radiator 32. At this time, in the indoor radiator 32, heat is exchanged between the heat medium flowing inside the indoor radiator 32 and the conditioned air, whereby the heat of the heat medium is released to the conditioned air to heat the conditioned air. The heated air is blown into the vehicle interior to heat the vehicle interior.

The heat medium that has passed through the indoor radiator 32 is depressurized to a low pressure through the first expansion valve 34, and then flows into the outdoor heat exchanger 35. The outdoor heat exchanger 35 functions as an evaporator when the heat pump cycle 30 is operating in the heating mode. That is, in the outdoor heat exchanger 35, heat is exchanged between the low-pressure heat medium flowing inside and the air flowing outside, so that the heat of the air is absorbed by the heat medium and the heat medium evaporates. To do. The heat medium evaporated in the outdoor heat exchanger 35 is sucked into the compressor 31 through the bypass passage W22 and compressed, and then recirculates in the heat pump cycle 30.

Next, the structures of the radiator 25 and the outdoor heat exchanger 35 will be specifically described.
As shown in FIG. 4, the radiator 25 has a structure in which a plurality of flat tubes 250 are stacked and arranged at a predetermined interval. The tube 250 is made of metal such as aluminum alloy. Inside the tube 250, a flow path 251 of cooling water circulating in the cooling system 20 is formed. The air introduced from the grille opening 41 flows in the gap formed between the adjacent tubes 250, 250. In the radiator 25, heat exchange is performed between the cooling water flowing inside each tube 250 and the air flowing outside each tube 250.

Like the radiator 25, the outdoor heat exchanger 35 also has a structure in which a plurality of flat tubes 350 are stacked and arranged at a predetermined interval. The tube 350 is also made of a metal such as an aluminum alloy. Inside the tube 350, a heat medium flow path 351 for circulating the heat pump cycle 30 is formed. The air introduced from the grille opening 41 flows in the gap formed between the adjacent tubes 350, 350. In the outdoor heat exchanger 35, heat exchange is performed between the heat medium flowing inside each tube 350 and the air flowing outside each tube 350.

In the gap formed between the tubes 250, 250 in the radiator 25 and in the gap formed between the tubes 350, 350 in the outdoor heat exchanger 35, fins 50 are arranged so as to extend between them. .. The fins 50 are so-called corrugated fins formed by bending a thin metal plate in a wavy shape. The fins 50 are joined to the tubes 250 of the radiator 25 and the tubes 350 of the outdoor heat exchanger 35 by brazing or the like. The fin 50 has a function of increasing the heat transfer area of the radiator 25 and the outdoor heat exchanger 35 by increasing the contact area with the air and improving the heat exchange performance thereof.

The radiator 25 and the outdoor heat exchanger 35 are physically and thermally connected via fins 50. That is, the radiator 25 and the outdoor heat exchanger 35 can exchange heat with each other via the fins 50. As described above, in the present embodiment, the fin 50 corresponds to a connecting member that thermally connects the radiator 25 and the outdoor heat exchanger 35.

On the other hand, as shown in FIG. 2, the heat exchange system 10 of the present embodiment further includes a shutter device 60 and a blower device 70.
The shutter device 60 is arranged in the grill opening 41. Therefore, the shutter device 60 is arranged upstream of the radiator 25 and the outdoor heat exchanger 35 in the air flow direction Da. The shutter device 60 has a plurality of blades. The shutter device 60 opens and closes the grill opening 41 by opening and closing a plurality of blades. When the shutter device 60 is in the open state, air is introduced into the radiator 25, the outdoor heat exchanger 35, and the engine room 42 through the grill opening 41 by the traveling wind of the vehicle. When the shutter device 60 is in the closed state, the introduction of air into the radiator 25, the outdoor heat exchanger 35, and the engine room 42 through the grille opening 41 is blocked. In this way, the shutter device 60 can switch the supply and cutoff of air to the radiator 25 and the outdoor heat exchanger 35. When the shutter device 60 is in the closed state, the aerodynamic performance of the vehicle can be improved, so that the fuel consumption of the vehicle can be improved. Specifically, when the shutter device 60 is in the closed state, the air resistance of the vehicle is lower than when the shutter device 60 is in the open state, so that the traveling load of the vehicle is reduced. As a result, as shown in FIG. 5, not only the running load of the vehicle but also the auxiliary machine power, the power of the auxiliary power source such as the PTC heater, the power of the compressor 31, the electric motor (MG) 21 mounted on the vehicle. It is possible to reduce the loss and the like of the inverter (INV) 23.

The blower 70 is arranged downstream of the radiator 25 and the outdoor heat exchanger 35 in the air flow direction Da. For example, when the vehicle is stopped or the vehicle is traveling at a low speed, the amount of air supplied to the radiator 25 and the outdoor heat exchanger 35 may be insufficient. In such a case, the blower device 70 supplies air to the radiator 25 and the outdoor heat exchanger 35 by driving the blower device 70 to supplement the shortage of air amount.

Next, the electrical configuration of the heat exchange system 10 of this embodiment will be described.
As shown in FIG. 6, the heat exchange system 10 of the present embodiment controls a cooling ECU (Electronic Control Unit) 28 that controls the cooling system 20, an air conditioning ECU 84 that controls an air conditioner 90 of the vehicle, and a pump 24. A pump ECU 29 for controlling the shutter device 60, a shutter ECU 61 for controlling the shutter device 60, and a fan ECU 71 for controlling the blower device 70 are provided. Each of the ECUs 28, 29, 61, 71, 84 is mainly composed of a microcomputer having a CPU, a memory, etc., and centrally controls a device to be controlled.

The output signals of the cooling system 20 and various sensors mounted on the vehicle are input to the cooling ECU 28 via the in-vehicle network Lc. Examples of such sensors include an inlet side water temperature sensor 26 and an outlet side water temperature sensor 27. As shown in FIG. 1, the inlet-side water temperature sensor 26 is provided in a pipe located upstream of the radiator 25 in the cooling water flow direction. The inlet side water temperature sensor 26 detects the temperature Tin of the cooling water flowing into the radiator 25 and outputs a signal according to the detected temperature Tin of the cooling water. The outlet side water temperature sensor 27 is provided in the pipe located downstream of the radiator 25 in the flow direction of the cooling water. The outlet side water temperature sensor 27 detects the temperature Tout of the cooling water discharged from the radiator 25 and outputs a signal according to the detected temperature Tout of the cooling water. Hereinafter, for convenience, the temperature Tin of the cooling water detected by the inlet water temperature sensor 26 is referred to as “inlet water temperature Tin”, and the temperature Tout of the cooling water detected by the outlet water temperature sensor 27 is referred to as “outlet water temperature Tout”. Called.

The cooling ECU 28 acquires information on the inlet side water temperature Tin and the outlet side water temperature Tout based on the output signals of the respective sensors 26 and 27, and is necessary for controlling the cooling system 20 based on the output signals of other sensors. Get various state quantities. The cooling ECU 28 transmits a control command value for controlling the pump 24 to the pump ECU 29 based on the information acquired by each sensor. The pump ECU 29 controls the pump 24 based on the control command value, whereby cooling control for cooling the electric motor 21, the battery 22, and the inverter 23 is executed.

The air conditioning ECU 84 is input with output signals of various sensors provided in the air conditioning device 90 and the vehicle. Examples of such sensors include an inside air temperature sensor 80, an outside air temperature sensor 81, a vehicle speed sensor 82, and an inlet side temperature sensor 39. The inside air temperature sensor 80 detects the inside air temperature Tr which is the temperature inside the vehicle compartment, and outputs a signal corresponding to the detected inside air temperature Tr. The outside air temperature sensor 81 detects the outside air temperature Tam which is the temperature outside the vehicle compartment and outputs a signal according to the detected outside air temperature Tam. The vehicle speed sensor 82 detects the vehicle speed V that is the traveling speed of the vehicle and outputs a signal corresponding to the detected vehicle speed V. As shown in FIG. 1, the inlet-side temperature sensor 39 detects the temperature Tc of the heat medium flowing into the outdoor heat exchanger 35, and outputs a signal according to the detected temperature Tc of the heat medium.

The air-conditioning ECU 84 also takes in signals transmitted from the operating device 83. The operation device 83 is a portion operated by a user when operating the air conditioner 90. With the operating device 83, for example, the temperature inside the vehicle compartment can be set. The operation device 83 transmits information on the set temperature Ts in the vehicle compartment, which is input by the user's operation, to the air conditioning ECU 84.

The air conditioning ECU 84 acquires information about the inside air temperature Tr, the outside air temperature Tam, and the vehicle speed V based on the output signals of the sensors 80 to 82, and is necessary for controlling the air conditioning device 90 based on the output signals of other sensors. Get various state quantities. Further, the air conditioning ECU 84 acquires various setting information set by the user's operation from the operation device 83. The air conditioning ECU 84 comprehensively controls the air conditioning device 90 including the heat pump cycle 30 based on the acquired information.

The shutter ECU 61 is communicatively connected to the cooling ECU 28 and the air conditioning ECU 84 via the vehicle-mounted network Lc. The shutter ECU 61 can send and receive various information to and from each ECU 28, 29, 71, 84 via the vehicle-mounted network Lc. The information transmitted and received among the ECUs 28, 29, 61, 71, 84 includes, for example, detection values detected by various sensors. Further, the cooling ECU 28 requests the shutter ECU 61 to open/close the shutter device 60 based on the operating state of the cooling system 20. Further, the air conditioning ECU 84 requests the shutter ECU 61 to open/close the shutter device 60 based on the operating state of the heat pump cycle 30. The shutter ECU 61 controls the open/closed state of the shutter device 60 based on requests from the cooling ECU 28 and the air conditioning ECU 84. In the present embodiment, the shutter ECU 61 corresponds to the control unit.

The fan ECU 71 controls the rotation speed and the like of the blower 70 based on requests from the cooling ECU 28 and the air conditioning ECU 84. In addition, the fan ECU 71 acquires information about the rotation speed Nf of the blower device 70.
Next, a specific procedure of the opening/closing operation request processing of the shutter device 60 executed by the cooling ECU 28 and the air conditioning ECU 84 will be described. First, the procedure of the process executed by the air conditioning ECU 84 will be described with reference to FIG. 7. The air conditioning ECU 84 repeatedly executes the process shown in FIG. 7 at a predetermined cycle while the heat pump cycle 30 is operating in the heating mode.

As shown in FIG. 7, the air conditioning ECU 84 first calculates the required heat absorption amount QA in the outdoor heat exchanger 35 as the process of step S10. Specifically, the air conditioning ECU 84 calculates the necessary heat radiation amount of the indoor radiator 32 required to bring the inside air temperature Tr close to the set temperature Ts based on the deviation between the set temperature Ts inside the vehicle compartment and the inside air temperature Tr. Calculate using the map and the like. The air conditioning ECU 84 calculates the required heat absorption amount QA, which is the heat amount that the heat medium needs to absorb from the air in the outdoor heat exchanger 35, from the calculated necessary heat radiation amount of the indoor radiator 32 using a calculation formula, a map, or the like. To do.

The air conditioning ECU 84 calculates the actual heat absorption amount Qa, which is the actual heat absorption amount in the outdoor heat exchanger 35, as the process of step S11 following step S10. The actual heat absorption amount Qa can be calculated as follows, for example.
The actual heat absorption amount Qa of the outdoor heat exchanger 35 is calculated from the temperature difference ΔT, which is the deviation between the temperature of the heat medium flowing through the outdoor heat exchanger 35 and the outside air temperature Tam, and the air amount GA supplied to the outdoor heat exchanger 35. It is possible to calculate using an arithmetic expression or the like. Therefore, the air conditioning ECU 84 of the present embodiment acquires the information of the outside air temperature Tam based on the output signal of the outside air temperature sensor 81. Further, since the air conditioning ECU 84 controls the rotation speed of the compressor 31 as the control of the heat pump cycle 30, it knows the information on the rotation speed of the compressor 31. There is a correlation between the rotation speed of the compressor 31 and the temperature of the heat medium of the outdoor heat exchanger 35. The air-conditioning ECU 84 calculates the temperature of the heat medium of the outdoor heat exchanger 35 from the rotation speed of the compressor 31 based on an arithmetic expression, a map, or the like showing the correlation between them. The air conditioning ECU 84 calculates a temperature difference ΔT which is a deviation between the calculated temperature of the heat medium of the outdoor heat exchanger 35 and the outside air temperature Tam. Further, the air conditioning ECU 84 calculates the amount GA of air blown to the outdoor heat exchanger 35 based on the vehicle speed V and the rotation speed Nf of the blower device 70 that can be acquired from the fan ECU 71. The air-conditioning ECU 84 calculates the actual heat absorption amount Qa of the outdoor heat exchanger 35 from the calculated temperature difference ΔT and the amount GA of air blown to the outdoor heat exchanger 35 using an arithmetic expression or the like.

The air conditioning ECU 84 determines whether or not the actual heat absorption amount Qa of the outdoor heat exchanger 35 is larger than the required heat absorption amount QA as the process of step S12 subsequent to step S11. When the air conditioning ECU 84 makes a positive determination in the process of step S12, that is, when the actual heat absorption amount Qa of the outdoor heat exchanger 35 is larger than the required heat absorption amount QA, the heat absorption from the air in the outdoor heat exchanger 35 is Judge that it is not necessary. In this case, the air conditioning ECU 84 sets the first request flag F1 to "0" as the process of step S13 in order to request the shutter ECU 61 to close the shutter device 60.

On the other hand, if the determination in step S12 is negative, that is, if the actual heat absorption amount Qa of the outdoor heat exchanger 35 is less than or equal to the required heat absorption amount QA, the air conditioning ECU 84 removes air from the outdoor heat exchanger 35. Judge that heat absorption is necessary. In this case, the air conditioning ECU 84 sets the first request flag F1 to "1" as the process of step S14 in order to request the shutter ECU 61 to open the shutter device 60.

After executing the process of step S13 or the process of step S14, the air conditioning ECU 84 transmits the information of the first request flag F1 to the shutter ECU 61 as the process of step S15. Subsequently, the air conditioning ECU 84 transmits the information of the required heat absorption amount QA to the shutter ECU 61 as the process of step S16, and then ends the series of processes shown in FIG. 7.

Next, a procedure of processing executed by the cooling ECU 28 will be described with reference to FIG. The cooling ECU 28 repeatedly executes the processing shown in FIG. 8 at a predetermined cycle.
As shown in FIG. 8, the cooling ECU 28 first calculates the estimated value TEin of the inlet side water temperature which is the estimated temperature of the cooling water flowing into the radiator 25 after the elapse of a predetermined time from the present as the processing of step S20. Specifically, the cooling ECU 28 determines the amount of change in the inlet-side water temperature Tin per unit time based on a plurality of detection values of the inlet-side water temperature Tin detected by the inlet-side water temperature sensor 26 from the present time to a predetermined time before. Calculate The cooling ECU 28 estimates the inlet-side water temperature after a lapse of a predetermined time, based on the calculated amount of change in the inlet-side water temperature Tin per unit time and the current inlet-side water temperature Tin detected by the inlet-side water temperature sensor 26. The value TEin is calculated by a calculation formula. In the present embodiment, the estimated value TEin of the inlet-side water temperature after the lapse of the predetermined time corresponds to the temperature of the radiator 25 after the lapse of the predetermined time.

The cooling ECU 28 determines whether or not the estimated value TEin of the inlet-side water temperature after a lapse of a predetermined time is smaller than a predetermined temperature threshold value Tth as a process of step S21 subsequent to step S20. The temperature threshold value Tth is an upper limit value of the inlet-side water temperature Tin required to maintain the cooling states of the electric motor 21, the battery 22, and the inverter 23, which are cooling targets of the cooling system 20. The temperature threshold Tth is set by an experiment or the like, and is stored in advance in the memory of the cooling ECU 28.

When the determination in step S21 is affirmative, that is, when the estimated value TEin of the inlet-side water temperature after the elapse of the predetermined time is smaller than the predetermined temperature threshold Tth, the cooling ECU 28 secures the cooling capacity of the cooling system 20. Judge that it is done. In this case, the cooling ECU 28 sets the second request flag F2 to "0" as the process of step S22 in order to request the shutter ECU 61 to close the shutter device 60.

When the negative determination is made in the process of step S21, that is, when the estimated value TEin of the inlet side water temperature after the elapse of the predetermined time is equal to or higher than the predetermined temperature threshold Tth, the cooling ECU 28 secures the cooling capacity of the cooling system 20. Judge that it is not done. In this case, since the radiator 25 needs to release the heat of the heat medium to the air, the cooling ECU 28 requests the shutter ECU 61 to open the shutter device 60. The flag F2 is set to "1".

After executing the process of step S22 or the process of step S23, the cooling ECU 28 transmits the information of the second request flag F2 to the shutter ECU 61 as the process of step S24. Subsequently, the cooling ECU 28 calculates the required heat radiation amount QB in the radiator 25 as the process of step S25. Specifically, since the cooling ECU 28 controls the pump 24, it knows the information on the rotation speed of the pump 24. The cooling ECU 28 calculates the flow rate of the cooling water flowing through the radiator 25 based on the rotation speed of the pump 24 using an arithmetic expression or the like. Further, the cooling ECU 28 calculates a deviation between the inlet side water temperature Tin and the outlet side water temperature Tout of the radiator 25, and calculates the deviation of the radiator 25 from the calculated deviation and the flow rate of the cooling water flowing through the radiator 25. Calculate the actual amount of heat dissipation. The cooling ECU 28 calculates the amount of heat to be released from the radiator 25 because the inlet side water temperature Tin of the radiator 25 does not reach the predetermined temperature, based on the actual amount of heat radiation of the radiator 25 and its transition. The required heat radiation amount QB is calculated. The predetermined temperature is the upper limit value of the inlet side water temperature Tin of the radiator 25 that can guarantee the operations of the electric motor 21, the battery 22, and the inverter 23, and is set in advance by experiments or the like.

As a process of step S26 subsequent to step S25, the cooling ECU 28 transmits information on the calculated required heat radiation amount QB of the radiator 25 to the shutter ECU 61, and then ends the series of processes shown in FIG.
On the other hand, the shutter ECU 61 controls the open/close state of the shutter device 60 based on the first request flag F1 transmitted from the air conditioning ECU 84 and the second request flag F2 transmitted from the cooling ECU 28. Next, a procedure of processing executed by the shutter ECU 61 will be specifically described with reference to FIG. The shutter ECU 61 repeatedly executes the processing shown in FIG. 9 at a predetermined cycle.

As shown in FIG. 9, in the shutter ECU 61, the first request flag F1 transmitted from the air conditioning ECU 84 and the second request flag F2 transmitted from the cooling ECU 28 are both set to “0” as the processing of step S30. Determine whether or not When both the first request flag F1 and the second request flag F2 are set to “0”, there is no need to absorb heat in the outdoor heat exchanger 35, and there is no need to dissipate heat in the radiator 25. Therefore, when both the first request flag F1 and the second request flag F2 are set to “0”, the shutter ECU 61 makes an affirmative decision in the process of step S30, and the shutter device 60 is selected as the process of step S31. After the closed state is set, the series of processing shown in FIG. 9 is ended. The closed state of the shutter device 60 in the present embodiment means a state in which a part or all of the shutter device 60 is closed.

If the determination in step S31 is negative, the shutter ECU 61 determines whether or not both the first request flag F1 and the second request flag F2 are set to "1" as the process of step S32. When both the first request flag F1 and the second request flag F2 are set to "1", the outdoor heat exchanger 35 needs to absorb heat and the radiator 25 needs to dissipate heat. is there. In the heat exchange system 10 of the present embodiment, in such a situation, the heat transfer from the radiator 25 to the outdoor heat exchanger 35 via the fins 50 should satisfy the heat absorption of the outdoor heat exchanger 35 and the heat radiation of the radiator 25. If it is possible, the shutter device 60 is closed. As a result, the time during which the shutter device 60 is set to the closed state can be extended, so that it becomes possible to improve the aerodynamic performance of the vehicle.

Specifically, when both the first request flag F1 and the second request flag F2 are set to “1”, the shutter ECU 61 makes an affirmative decision in the process of step S32, and as the process of step S33, the outdoor It is determined whether the required heat absorption amount QA of the heat exchanger 35 is smaller than the required heat radiation amount QB of the radiator 25. If the shutter ECU 61 makes a negative determination in the process of step S32, that is, if the required heat absorption amount QA of the outdoor heat exchanger 35 is equal to or greater than the required heat radiation amount QB of the radiator 25, the shutter device 61 performs the processing of step S37. Set 60 to the open state.

When the shutter ECU 61 makes a positive determination in the process of step S33, that is, when the required heat absorption amount QA of the outdoor heat exchanger 35 is smaller than the required heat radiation amount QB of the radiator 25, the shutter ECU 61 determines the determination value as the process of step S34. QC is calculated based on the following formula f1.
QC←QB-QA-α (f1)
The correction value α in the expression f1 indicates the amount of heat lost when heat is transferred from the radiator 25 to the outdoor heat exchanger 35 via the fins 50. The correction value α includes, for example, the amount of heat released from the fins 50 to the air. The correction value α is obtained by experiments and the like, and is stored in advance in the memory of the shutter ECU 61. If the correction value α is small enough to be ignored with respect to the required heat absorption amount QA and the required heat radiation amount QB, the correction value α may be set to “0”.

The shutter ECU 61 determines whether or not the determination value QC is larger than a preset threshold value Qth as a process of step S35 subsequent to step S34. In the present embodiment, the process of step S35 corresponds to the process of determining whether or not the required heat absorption amount QA of the outdoor heat exchanger 35 can be supplemented by the required heat radiation amount QB of the radiator 25. When the determination in step S35 is affirmative, that is, when the determination value QC is larger than the threshold value Qth, the shutter ECU 61 supplements the required heat absorption amount QA of the outdoor heat exchanger 35 with the required heat radiation amount QB of the radiator 25. It is determined that the situation is possible. In this case, as the processing of step S36, the shutter ECU 61 sets the shutter device 60 to the closed state, and then ends the series of processing shown in FIG.

When the determination in step S35 is negative, that is, when the determination value QC is less than or equal to the threshold value Qth, the shutter ECU 61 sets the required heat absorption amount QA of the outdoor heat exchanger 35 to the required heat radiation amount QB of the radiator 25. It is determined that the situation cannot be compensated by. In this case, as the processing of step S37, the shutter ECU 61 sets the shutter device 60 to the open state, and then ends the series of processing shown in FIG.

On the other hand, when the shutter ECU 61 makes a negative determination in the process of step S32, that is, when one of the first request flag F1 and the second request flag F2 is set to “1”, the shutter ECU 61 proceeds to step S38. As a process, after setting the shutter device 60 to the open state, the series of processes shown in FIG. 9 is ended.

According to the heat exchange system 10 of the present embodiment described above, the actions and effects shown in the following (1) to (4) can be obtained.
(1) Since the radiator 25 and the outdoor heat exchanger 35 are thermally connected via the fins 50, heat can be transferred between the radiator 25 and the outdoor heat exchanger 35. Therefore, even when it is necessary to rotate the blower device 70 to perform heat exchange between the radiator 25 and the outdoor heat exchanger 35, it is possible to reduce the rotation speed of the blower device. Further, the blower 70 can be stopped depending on the conditions. Therefore, power consumption can be reduced.

(2) If the vehicle is not provided with the shutter device 60, the air flowing in from the grille opening 41 passes through the radiator 25 and the outdoor heat exchanger 35, so that the heat of the radiator 25 escapes to the air. .. Therefore, it becomes difficult for heat to be transferred from the radiator 25 to the outdoor heat exchanger 35. More specifically, as shown in FIG. 10, as the air volume of the air passing through the radiator 25 increases, the heat transfer amount from the radiator 25 to the outdoor heat exchanger 35 decreases. In this respect, in the heat exchange system 10 of the present embodiment, when the outdoor heat exchanger 35 is operating as an evaporator, in other words, when the outdoor heat exchanger 35 is operating as a heat absorber that absorbs heat from the air. First, the shutter ECU 61 closes the shutter device 60. By closing the shutter device 60, the inflow of air into the radiator 25 and the outdoor heat exchanger 35 can be blocked, so that the heat of the radiator 25 is unlikely to escape to the air. Therefore, it is possible to more efficiently transfer heat between the radiator 25 and the outdoor heat exchanger 35.

(3) The shutter ECU 61 subtracts the required heat absorption amount QA of the outdoor heat exchanger 35 from the required heat radiation amount QB of the radiator 25 when both the first request flag F1 and the second request flag F2 are set to "1". When it is determined that the determination value QC obtained by doing so is larger than the threshold value Qth, the shutter device 60 is set to the closed state. As a result, when the required heat absorption amount QA of the outdoor heat exchanger 35 can be supplemented by the required heat radiation amount QB of the radiator 25, the shutter device 60 will be in the closed state, and therefore the shutter device 60 will be in the closed state. The set period can be extended. As a result, the aerodynamic performance of the vehicle can be improved. Therefore, the fuel efficiency of the vehicle can be improved, and the cruising range can be expanded. It is also possible to extend the time during which the heat pump cycle 30 can operate in the heating mode.

(4) The shutter ECU 61 further subtracts the correction value α based on the heat radiation amount of the fins 50 from the subtraction value obtained by subtracting the required heat absorption amount QA of the outdoor heat exchanger 35 from the heat radiation amount QB of the radiator 25, thereby making a determination. Calculate the value QC. As a result, it is possible to calculate the determination value QC in consideration of the heat radiation amount of the fins 50, and it is possible to more accurately determine whether or not the shutter device 60 can be closed. Become.

<Second Embodiment>
Next, a second embodiment of the heat exchange system 10 will be described. Hereinafter, differences from the heat exchange system 10 of the first embodiment will be mainly described.
As shown in FIG. 11, the shutter ECU 61 sets the shutter device 60 to the open state in the process of step S37, and then transmits the control command value of the blower device 70 to the fan ECU 71 as the process of step S39. The drive of the device 70 is controlled. The process of step S39 is executed as follows.

The shutter ECU 61 transmits a duty value to the fan ECU 71 as a control command value for the blower 70. The fan ECU 71 controls driving of the blower device 70 based on the duty value. The duty value indicates the energization control amount of the blower 70. As the duty value increases, the energization amount of the blower device 70 increases, so that the rotation speed of the blower device 70 increases. On the other hand, as the duty value decreases, the amount of electricity supplied to the blower device 70 decreases, and the rotation speed of the blower device 70 decreases.

Further, the shutter ECU 61 calculates the heat exchange amount QD between the radiator 25 and the outdoor heat exchanger 35. The heat exchange amount QD is calculated as follows, for example. First, the shutter ECU 61 estimates the temperature of the radiator 25 based on the inlet side water temperature Tin detected by the inlet side water temperature sensor 26. Further, the shutter ECU 61 estimates the temperature of the outdoor heat exchanger 35 based on the refrigerant temperature Tc detected by the inlet side temperature sensor 39. The shutter ECU 61 calculates the temperature difference between the radiator 25 and the outdoor heat exchanger 35, and calculates the heat exchange amount QD based on the calculated temperature difference. The shutter ECU 61 may estimate the temperature of the radiator 25 based on the outlet side water temperature Tout detected by the outlet side water temperature sensor 26. When the heat exchange system 10 is provided with a sensor that detects the temperature of the refrigerant on the outlet side of the outdoor heat exchanger 35, the shutter ECU 61 causes the outdoor heat exchanger to detect the temperature of the refrigerant based on the temperature of the refrigerant detected by the sensor. The temperature of 35 may be estimated. Further, it is possible to use a sensor that detects the pressure of the refrigerant instead of the sensor that detects the temperature of the refrigerant.

Further, the shutter ECU 61 calculates a first subtraction value D1 obtained by subtracting the heat exchange amount QD from the required heat absorption amount QA of the outdoor heat exchanger 35. The shutter ECU 61 has a map showing the relationship between the heat absorption amount of the outdoor heat exchanger 35 and the duty value of the blower device 70, and based on this map, the first subtraction value D1 to the first duty value of the blower device 70. Calculate DA.

The shutter ECU 61 also calculates a second subtraction value D2 obtained by subtracting the heat exchange amount QD from the required heat radiation amount QB of the radiator 25. The shutter ECU 61 has a map showing the relationship between the heat radiation amount of the radiator 25 and the duty value of the blower device 70, and calculates the second duty value DB of the blower device 70 from the second subtraction value D2 based on this map. To do.

The shutter ECU 61 sets the larger one of the first duty value DA and the second duty value DB as the duty value DC of the blower device 70, and sends the set duty value DC to the fan ECU 71 to blow air. The drive of the device 70 is controlled.
According to the heat exchange system 10 of the present embodiment described above, the action and effect shown in the following (5) can be further obtained.

(5) When the shutter ECU 61 determines that the determination value QC is equal to or less than the threshold value Qth, the shutter device 60 sets the shutter device 60 to the open state and changes the heat exchange amount QD from the required heat absorption amount QA of the outdoor heat exchanger 35. Based on the subtracted first subtraction value D1 and the second subtraction value D2 obtained by subtracting the heat exchange amount QD from the required heat radiation amount QB of the radiator 25, the drive of the blower device 70 is controlled. According to such a configuration, as compared with the case where the air blower 70 is driven based on the required heat absorption amount QA of the outdoor heat exchanger 35 and the required heat radiation amount QB of the radiator 25, the heat radiation of the radiator 25 and the outdoor heat exchanger 35 It is possible to reduce the rotation speed of the blower device 70 while satisfying the heat absorption of. Therefore, power consumption can be reduced.

<Third Embodiment>
Next, a third embodiment of the heat exchange system 10 will be described. Hereinafter, differences from the heat exchange system 10 of the first embodiment will be mainly described.
As shown by the broken line in FIG. 1, the heat exchange system 10 of the present embodiment is provided with a refrigerant pressure sensor 85 that detects the pressure Pa of the refrigerant flowing out of the outdoor heat exchanger 35. In the present embodiment, the refrigerant pressure sensor 85 corresponds to a sensor that detects the pressure of the refrigerant flowing through the outdoor heat exchanger 35. As shown by the broken line in FIG. 6, the output signal of the refrigerant pressure sensor 85 is taken into the air conditioning ECU 84. The air conditioning ECU 84 is shown in FIG. 12 based on the refrigerant pressure Pa detected by the refrigerant pressure sensor 85, the inside air temperature Tr detected by the inside air temperature sensor 80, and the outside air temperature Tam detected by the outside air temperature sensor 81. Execute the process.

As shown in FIG. 12, the air conditioning ECU 84 first calculates the target refrigerant pressure PA as the process of step S40. Specifically, the air conditioning ECU 84 calculates the basic value PAb of the target refrigerant pressure from the outside air temperature Tam using the map stored in the memory. In this map, the basic value PAb of the target refrigerant pressure is set to increase as the outside air temperature Tam rises. Further, the air conditioning ECU 84 calculates a deviation ΔT (=Ts−Tr) between the set temperature Ts in the vehicle compartment and the inside air temperature Tr, and uses the calculated deviation ΔT to calculate the target refrigerant using a map stored in the memory. A pressure correction value ΔPA is calculated. In this map, the correction value ΔPA increases as the deviation ΔT increases, and the correction value ΔPA decreases as the deviation ΔT decreases. The air conditioning ECU 84 obtains the final target refrigerant pressure PA (=PAb+ΔPA) by adding the correction value ΔPA to the basic value PAb of the target refrigerant pressure.

The air conditioning ECU 84 acquires the information of the actual refrigerant pressure Pa of the outdoor heat exchanger 35 based on the output signal of the refrigerant pressure sensor 85 as the processing of step S41 following step S40.
The air conditioning ECU 84 determines whether or not the actual refrigerant pressure Pa is higher than the target refrigerant pressure PA as the processing of step S42 following step S41. When the actual refrigerant pressure Pa is higher than the target refrigerant pressure PA, the air conditioning ECU 84 makes an affirmative decision in the process of step S42, and as the process of the following step S43, the shutter ECU 61 is set to the closed state. Instruct. On the other hand, when the actual refrigerant pressure Pa is equal to or lower than the target refrigerant pressure PA, the air conditioning ECU 84 makes a negative determination in the process of step S42, and the shutter device 60 is opened to open the shutter device 60 as the process of step S44. Instruct the ECU 61. The shutter ECU 61 opens and closes the shutter device 60 based on an instruction from the air conditioning ECU 84.

Next, an operation example of the heat exchange system 10 of the present embodiment will be described.
If the refrigerant pressure Pa of the outdoor heat exchanger 35 becomes too low, the outdoor heat exchanger 35 will be frosted. Therefore, the target refrigerant pressure PA is set according to the outside air temperature Tam. On the other hand, if the refrigerant pressure Pa of the outdoor heat exchanger 35 rises too much, the temperature difference between the outdoor heat exchanger 35 and the outside air temperature Tam cannot be obtained, and the heat absorption amount of the outdoor heat exchanger 35 decreases. When the heat absorption amount of the outdoor heat exchanger 35 from the outside air is small, the refrigerant pressure Pa of the outdoor heat exchanger 35 decreases, and when the heat absorption amount of the outdoor heat exchanger 35 from the outside air is large, the refrigerant pressure Pa of the outdoor heat exchanger 35 increases. Go up. That is, when the wind speed of the outside air supplied to the outdoor heat exchanger 35 increases due to the opening of the shutter device 60, the refrigerant pressure Pa of the outdoor heat exchanger 35 increases. At this time, if the refrigerant pressure Pa of the outdoor heat exchanger 35 is higher than the target refrigerant pressure PA, the wind speed of the outside air supplied to the outdoor heat exchanger 35 may be slowed, that is, the shutter device 60 may be closed. it can.

Note that, when the refrigerant pressure Pa of the outdoor heat exchanger 35 is higher than the target refrigerant pressure PA, instead of closing the shutter device 60, a method of lowering the rotation speed of the blower device 70 is adopted. Is also possible.
According to the heat exchange system 10 of the present embodiment, it is not necessary to calculate the heat quantities QA, Qa, QB, Qc used in the heat exchange system 10 of the first embodiment, and therefore the calculation processing can be simplified. is there.

<Other Embodiments>
In addition, each embodiment can also be implemented in the following forms.
-In the heat exchange system 10 of each embodiment, not only the fin 50 but an appropriate member can be used as a connecting member that thermally connects the radiator 25 and the outdoor heat exchanger 35.

The shutter device 60 may be arranged in the air passage Wa extending from the grill opening 41 to the engine room 42. Further, the shutter device 60 may be arranged on the downstream side of the outdoor heat exchanger 35 in the air flow direction.
The heat source to be cooled by the cooling system 20 is not limited to the electric motor 21, the battery 22, and the inverter 23, and any heat source mounted on the vehicle can be used.

The shutter ECU 61 of the first embodiment makes a negative determination in the process of step S32 shown in FIG. 9, that is, one of the first request flag F1 and the second request flag F2 is set to “1”. If so, the process of closing the shutter device 60 may be executed.
The ECU and the control method thereof described in the present disclosure are provided by configuring a processor and a memory programmed to execute one or more functions embodied by a computer program. It may be realized by a dedicated computer. The control device and the control method thereof described in the present disclosure may be realized by a dedicated computer provided by configuring a processor including one or a plurality of dedicated hardware logic circuits. A control device and a control method thereof according to the present disclosure are configured by a combination of a processor and a memory programmed to execute one or a plurality of functions, and a processor including one or a plurality of hardware logic circuits. It may be implemented by one or more dedicated computers. The computer program may be stored in a computer-readable non-transition tangible recording medium as an instruction executed by a computer. The dedicated hardware logic circuit and the hardware logic circuit may be realized by a digital circuit including a plurality of logic circuits or an analog circuit.

When the configuration of the above embodiment is adopted in a vehicle that uses an electric motor as a power source, such as an electric vehicle, the engine room 42 may be a space in which the electric motor is housed.
As shown in FIG. 13, the radiator 25 may be arranged downstream of the outdoor heat exchanger 35 in the air flow direction Da. By the way, even when the shutter device 60 is in the closed state, a gap may be formed between the plurality of blades of the shutter device 60. Therefore, a small amount of air may flow into the engine room 42 through the gap. There is. This air flow may make it difficult to transfer the heat of the radiator 25 to the outdoor heat exchanger 35 if the fins 50 are not provided in the configuration shown in FIG. 13. Specifically, as shown in FIG. 13, when the radiator 25 is arranged downstream of the outdoor heat exchanger 35 in the air flow direction Da, the air that has absorbed the heat of the radiator 25 is the outdoor heat exchange. It flows into the engine room 42 without flowing through the vessel 35. Therefore, when the fins 50 are not provided, it is difficult to transfer the heat of the radiator 25 to the outdoor heat exchanger 35. In this regard, as shown in FIG. 13, if the radiator 25 and the outdoor heat exchanger 35 are thermally connected to each other through the fins 50, a small amount of air will be emitted from the radiator 25 when the shutter device 60 is closed. Even when the heat flows to the outdoor heat exchanger 35, the heat of the radiator 25 can be transferred to the outdoor heat exchanger 35 via the fins 50.

In the processes shown in steps S31 and S36 shown in FIGS. 9 and 11, instead of the process of closing the shutter device 60, the opening degree of the shutter device 60 is set in steps S37 and S38. You may perform the process which adjusts to a closing direction rather than the opening degree of 60. The same applies to the process of step S43 in FIG.

The outdoor heat exchanger 35 is not limited to being used as a heat absorber that absorbs heat from the air, but may be used as a radiator that radiates heat to the air.
The present disclosure is not limited to the above specific examples. A person skilled in the art appropriately modified the above-described specific examples is also included in the scope of the present disclosure as long as the features of the present disclosure are provided. The elements included in the above-described specific examples, and the arrangement, conditions, shapes, and the like of the elements are not limited to those illustrated, but can be appropriately changed. The respective elements included in the above-described specific examples can be appropriately combined as long as there is no technical contradiction.

Claims (10)

1. A heat exchanger used in a heat exchange cycle (30) of an air conditioner for a vehicle to absorb heat from air or release heat to air, the heat medium circulating in the heat exchange cycle, and introduced into the engine room from the front of the vehicle. A heat exchanger (35) for exchanging heat with the air to be stored;
   Between cooling water used for a cooling system (20) for cooling a heat source of the vehicle and for cooling a heat source mounted on the vehicle, and air introduced into the engine room from the front of the vehicle. A radiator (25) that exchanges heat with
   A connecting member (50) for thermally connecting the heat exchanger and the radiator;
   A heat exchange system comprising: a shutter device (60) capable of switching between supply and interruption of air to the heat exchanger and the radiator.
2. The heat exchange system according to claim 1, further comprising a control unit (61) that controls opening and closing of the shutter device.
3. The heat exchange system according to claim 2, wherein the control unit closes a part or all of the shutter device when the heat exchanger operates as a heat absorber that absorbs heat from air.
4. The control unit sets a heat absorption amount of the heat exchanger required in the heat exchange cycle as a necessary heat absorption amount (QA), and a heat radiation amount of the radiator required in the cooling system as a necessary heat radiation amount (QB). When, when it is determined that the required heat absorption amount can be supplemented by the required heat radiation amount, it is determined that the required heat absorption amount can be supplemented by the required heat radiation amount. The heat exchange system according to claim 2, wherein the opening adjusts the opening degree of the shutter device.
5. The control unit is configured such that an actual heat absorption amount (Qa) of the heat exchanger is equal to or less than a necessary heat absorption amount of the heat exchanger and a temperature (TEin) of the radiator after a predetermined time has passed is a predetermined temperature (Tth). In the above case, it is determined whether or not the determination value (QC) obtained by subtracting the required heat absorption amount of the heat exchanger from the required heat radiation amount of the radiator is larger than a predetermined threshold value (Qth). When the determination value is larger than the threshold value, it is determined that the required heat absorption amount can be supplemented by the required heat radiation amount, and the opening degree of the shutter device is adjusted in the closing direction. The heat exchange system according to item 4.
6. The control unit further subtracts a correction value (α) based on the heat radiation amount of the connecting member from a subtraction value obtained by subtracting the necessary heat absorption amount of the heat exchanger from the necessary heat radiation amount of the radiator to obtain the determination value. The heat exchange system according to claim 5.
7. Further comprising a blower (70) for blowing air to the heat exchanger and the radiator,
   When the control unit determines that the determination value is less than or equal to the threshold value, the control unit sets the shutter device to the open state, and determines between the radiator and the heat exchanger from the required heat absorption amount of the heat exchanger. And a second subtraction value (D2) obtained by subtracting the heat exchange amount between the radiator and the heat exchanger from the required heat radiation amount of the radiator. The heat exchange system according to claim 5 or 6, which controls driving of the air blower based on one of the first subtraction value and the second subtraction value.
8. The control unit sets the target refrigerant pressure based on the outside air temperature that is the temperature outside the vehicle compartment and the inside air temperature that is the temperature inside the vehicle compartment, and the pressure of the heat medium flowing through the heat exchanger is lower than the target refrigerant pressure. The heat exchange system according to claim 2, wherein the opening degree of the shutter device is adjusted in a closing direction when the value is larger.
9. The shutter device is arranged in a grill opening (41) of the vehicle or in an air passage (Wa) extending from the grill opening to the engine room (42). The heat exchange system described.
10. The heat exchange system according to any one of claims 1 to 9, wherein the radiator is arranged on the upstream side in the air flow direction with respect to the heat exchanger.

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