Air conditioning control system

Abstract

To provide an air conditioning control system capable of supplying heat to a condenser more stably during defrosting of a condenser.SOLUTION: A control system A10 comprises: a first conduit 41 and a second conduit 42 through which fluids respectively flow; a compressor 21 and a condenser 22 which are connected to the first conduit 41; an air conditioning device 10 and a heater 31 which are connected to the second conduit 42; a heat exchanger 23 which exchanges heat of the fluids flowing through the first conduit 41 and the second conduit 42; and a control device 60 which controls the heater 31. The fluid flowing through the first conduit 41 is compressed by the compressor 21. The fluid flowing through the second conduit 42 is heated by the heater 31. When there is a defrosting request for the condenser 22, the control device 60 controls the heater 31.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] Patent Document 1 discloses an example of a vehicle air conditioner. The air conditioner includes an in-vehicle air conditioning unit and an out-vehicle heat exchanger (condenser). In this air conditioner, when it is determined that the out-vehicle heat exchanger is frosted during the heating operation by the in-vehicle air conditioning unit, if it is detected that the required heating capacity is below a predetermined value (a state where the heating can satisfy the requirement even if it is relatively weak), the air mix damper is controlled so that the air flow rate to the downstream in-vehicle heat exchanger of the in-vehicle air conditioning unit is reduced. Here, the downstream in-vehicle heat exchanger heats the flowing air. Thereby, since the heat radiation from the downstream in-vehicle heat exchanger is suppressed, the defrosting of the out-vehicle heat exchanger can be efficiently performed without significantly impairing the comfort of the vehicle occupants.

[0003] In the vehicle air conditioner disclosed in Patent Document 1, a measure is taken to control the temperature of the fluid (refrigerant) flowing through the out-vehicle heat exchanger and the in-vehicle air conditioning unit by adjusting the air flow rate to the downstream in-vehicle heat exchanger. However, in this measure, when the temperature of the air flowing through the downstream in-vehicle heat exchanger is extremely low, the heat of the fluid flowing into the out-vehicle heat exchanger may radiate toward the downstream in-vehicle heat exchanger. As a result, the heat supplied to the out-vehicle heat exchanger decreases, and thus the defrosting efficiency of the out-vehicle heat exchanger may decrease.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In view of the above circumstances, an object of the present invention is to provide an air-conditioning control system capable of more stably supplying heat to a capacitor when defrosting the capacitor.

Means for Solving the Problems

[0006] The air-conditioning control system provided by the present invention includes a first pipeline and a second pipeline through which fluids flow respectively, a compressor and a capacitor connected to the first pipeline, an air-conditioning device and a heater connected to the second pipeline, a heat exchanger for mutually exchanging the heat of the fluids flowing in each of the first pipeline and the second pipeline, and a control device for controlling the heater. The fluid flowing in the first pipeline is compressed by the compressor. The fluid flowing in the second pipeline is heated by the heater. When there is a defrosting requirement for the capacitor, the control device controls the heater.

[0007] In the implementation of the present invention, preferably, the air-conditioning control system has a heater core connected to the second pipeline. When there is an operation requirement for the air-conditioning device, the control device controls the heater after setting the target temperature of the fluid flowing into the heater core.

Advantages of the Invention

[0008] According to the air-conditioning control system according to the present invention, it is possible to more stably supply heat to the capacitor when defrosting the capacitor.

[0009] Other features and advantages of the present invention will become clearer from the following detailed description based on the accompanying drawings.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0011] Embodiments for carrying out the present invention will be described based on the accompanying drawings.

[0012] Based on FIGS. 1 to 5, an air conditioning control system (hereinafter referred to as "control system A10") according to an embodiment of the present invention will be described. As shown in FIG. 1, the control system A10 includes an air conditioner 10, a compressor 21, a condenser 22, a heat exchanger 23, a heater 31, a storage battery 32, a pump 33, a first pipeline 41, a second pipeline 42, a third pipeline 43, a valve 49, and a control device 60.

[0013] First, based on FIG. 1, the configuration of the control system A10 will be described.

[0014] The air conditioner 10 includes a housing 11, a blower 12, an evaporator 13, a heater core 14, and an air mix door 15. The housing 11 houses the blower 12, the evaporator 13, the heater core 14, and the air mix door 15. In the air conditioner 10, the air flowing into the housing 11 by the operation of the blower 12 is temperature-adjusted by the evaporator 13, the heater core 14, and the air mix door 15. The temperature-adjusted air flows out from various outlets (not shown) provided in the passenger compartment. The housing 11 is made of a resin containing, for example, polypropylene.

[0015] Inside the housing 11, a first passage 111 and a second passage 112 are provided. In the first passage 111, the air that has flowed into the housing 11 due to the operation of the blower 12 flows downward. The air flowing downward in the first passage 111 is cooled by the evaporator 13 or, after passing through the evaporator 13 as it is, is appropriately heated by the heater core 14. The second passage 112 is located on the downstream side in the air flow direction from the first passage 111 and is connected to the first passage 111. In the second passage 112, the air that has been cooled by the evaporator 13 or has passed through the evaporator 13 as it is in the first passage 111 and the air that has been appropriately heated by the heater core 14 in the first passage 111 are mixed. The air mixed in the second passage 112 flows downward toward various air outlets (not shown) provided in the passenger compartment.

[0016] The first passage 111 includes an intermediate passage 111A. The intermediate passage 111A is an air flow passage from the evaporator 13 to the second passage 112 in the first passage 111. The intermediate passage 111A is divided into two systems. One of the two systems goes from the evaporator 13 to the heater core 14. The other of the two systems goes from the evaporator 13 to the second passage 112 without passing through the heater core 14.

[0017] The blower 12 is located on the upstream side in the air flow direction from the first passage 111. The blower 12 takes in air from a supply port (not shown) of the housing 11 into the inside of the housing 11 and causes the air to flow downward in the first passage 111. The blower 12 causes the air to flow downward from the outside toward the first passage 111 by rotating the fan.

[0018] The evaporator 13 is disposed in the first passage 111 of the housing 11. The evaporator 13 crosses the first passage 111. The evaporator 13 cools the air.

[0019] The heater core 14 is disposed in the housing 11 at the boundary between the first passage 111 (one line of the intermediate passage 111A) and the second passage 112. The heater core 14 heats the air flowing down one line of the intermediate passage 111A of the first passage 111 after passing through the evaporator 13.

[0020] The air mix door 15 is disposed in the intermediate passage 111A of the first passage 111 of the housing 11. In the air conditioner 10, the air mix door 15 rotates around an axis perpendicular to the downward air flow direction in the intermediate passage 111A. The air mix door 15 is rotated by an actuator such as a servo motor. Alternatively, the air mix door 15 may be movable by a rack and pinion mechanism that converts the rotational motion obtained by the actuator into a reciprocating motion. When the air mix door 15 moves, the intermediate passage 111A is partitioned into two lines. Thereby, the ratio of the air volume flowing down each of the two lines of the intermediate passage 111A is appropriately adjusted.

[0021] The storage battery 32 stores the electric power supplied from a charger (not shown) installed outdoors. The electric power stored in the storage battery 32 is supplied to, in addition to the control system A10, a power unit (motor) and the like. The storage battery 32 is, for example, a lithium ion battery.

[0022] The compressor 21, the capacitor 22, and the first pipeline 41 constitute a heat pump in the control system A10. In the first pipeline 41, the fluid flows in the direction of the arrow shown in FIG. 1. The fluid is, for example, a hydrofluorocarbon. The compressor 21 and the capacitor 22 are connected to the first pipeline 41. As a result, the fluid flowing in the first pipeline 41 flows into and out of each of the compressor 21 and the capacitor 22. The compressor 21 compresses the fluid using the power supplied from the storage battery 32. As the fluid is compressed, the temperature of the fluid rises. The capacitor 22 condenses and liquefies the fluid compressed by the compressor 21. The condensed and liquefied fluid flows into the evaporator 13 of the air conditioner 10 after being decompressed and expanded by an expansion valve (not shown). The evaporator 13 evaporates the decompressed and expanded fluid. Therefore, the evaporator 13 cools the air flowing down the housing 11 of the air conditioner 10 by heat exchange accompanying the evaporation of the fluid. The fluid flowing out of the evaporator 13 flows into the compressor 21 again. Thus, the cooling cycle of the air conditioner 10 is performed.

[0023] The heater core 14, the heater 31, the pump 33, and the second pipeline 42 of the air conditioner 10 constitute a heating cycle of the air conditioner 10. In the second pipeline 42, the fluid flows in the direction shown in FIG. 1. The fluid is, for example, water. The heater core 14, the heater 31, and the pump 33 are connected to the second pipeline 42. As a result, the fluid flowing in the second pipeline 42 flows into and out of each of the heater core 14, the heater 31, and the pump 33. The heater 31 heats the fluid flowing in the second pipeline 42 using the power supplied from the storage battery 32. The heater core 14 heats the air flowing down the housing 11 of the air conditioner 10 by heat exchange with the fluid heated by the heater 31. The pump 33 circulates the fluid flowing in the second pipeline 42 using the power supplied from the storage battery 32. The pump 33 is located between the outflow side of the heater core 14 and the inflow side of the heater 31 in the second pipeline 42. However, the position of the pump 33 in the second pipeline 42 is not limited to this.

[0024] The heat exchanger 23 is located between the outflow side of the compressor 21 and the inflow side of the condenser 22 in the first pipeline 41. At the same time, the heat exchanger 23 is located between the outflow side of the heater core 14 of the air conditioner 10 and the inflow side of the heater 31 in the second pipeline 42. The heat exchanger 23 mutually exchanges the heat of the fluids flowing in each of the first pipeline 41 and the second pipeline 42. In the control system A10, a heating cycle of the air conditioner 10 utilizing a heat pump is performed. In the said heating cycle, the heat exchanger 23 conducts the heat of the fluid flowing in the first pipeline 41 compressed by the compressor 21 to the fluid flowing in the second pipeline 42. The fluid flowing in the first pipeline 41 heat-exchanged in the heat exchanger 23 is decompressed and expanded by an expansion valve (not shown) and then flows into the condenser 22. The condenser 22 evaporates the decompressed and expanded fluid. The fluid flowing out from the condenser 22 flows into the compressor 21 again. In this case, the fluid flowing in the first pipeline 41 does not flow into and out of the evaporator 13 of the air conditioner 10.

[0025] The third pipeline 43 branches off from the second pipeline 42 between the outflow side of the heater core 14 of the air conditioner 10 and the inflow side of the heater 31. The third pipeline 43 branched off from the second pipeline 42 merges into the second pipeline 42 via the storage battery 32. In the third pipeline 43, the fluid flowing in the second pipeline 42 flows in. The flowing-in fluid flows out into the second pipeline 42 via the storage battery 32. Therefore, when the fluid heated by the heater 31 in the second pipeline 42 flows into the third pipeline 43, the temperature of the storage battery 32 is increased.

[0026] The valve 49 is arranged at the branching and merging part of the third pipeline 43 in the second pipeline 42. When the valve 49 opens, the fluid flowing in the second pipeline 42 branches off into the third pipeline 43, and at the same time, the fluid passing through the storage battery 32 in the third pipeline 43 merges into the second pipeline 42. When there is a requirement for increasing the temperature of the storage battery 32, the heater 31 and the pump 33 operate, and at the same time, the valve 49 opens and the fluid flows into the third pipeline 43 from the second pipeline 42.

[0027] The control system A10 further includes a first temperature sensor 51, a second temperature sensor 52, and a third temperature sensor 53.

[0028] The first temperature sensor 51 is disposed in a first pipeline 41 located between the outflow side of the compressor 21 and the inflow side of the heat exchanger 23. The first temperature sensor 51 generates an electrical signal related to a first temperature t1 of the fluid flowing in the first pipeline 41. The first temperature t1 corresponds to the temperature of the fluid flowing into the heat exchanger 23, that is, the temperature of the fluid compressed by the compressor 21. The electrical signal generated by the first temperature sensor 51 is transmitted to the control device 60.

[0029] The second temperature sensor 52 is disposed in a second pipeline 42 located between the outflow side of the heater 31 and the inflow side of the heater core 14 of the air conditioner 10. The second temperature sensor 52 generates an electrical signal related to a second temperature t2 of the fluid flowing in the second pipeline 42. The second temperature t2 corresponds to the temperature of the fluid flowing into the heater core 14. The electrical signal generated by the second temperature sensor 52 is transmitted to the control device 60.

[0030] The third temperature sensor 53 is disposed adjacent to the cells of the storage battery 32. The third temperature sensor 53 generates an electrical signal related to a third temperature t3. The third temperature t3 corresponds to the temperature of the storage battery 32. The electrical signal generated by the third temperature sensor 53 is transmitted to the control device 60.

[0031] The control device 60 is an ECU (Electric Control Unit) that controls the heater 31. The ECU is a microcomputer equipped with a CPU (Central Processing Unit) and a memory. The control device 60 includes a temperature detection unit 61 and a control unit 62.

[0032] The temperature detection unit 61 detects the first temperature t1, the second temperature t2, and the third temperature t3 based on the electrical signals transmitted from the first temperature sensor 51, the second temperature sensor 52, and the third temperature sensor 53 respectively. Information on the first temperature t1, the second temperature t2, and the third temperature t3 detected by the temperature detection unit 61 is transmitted to the control unit 62.

[0033] Based on the information on the first temperature t1, the second temperature t2, and the third temperature t3 transmitted from the temperature detection unit 61, the control unit 62 controls the heater 31.

[0034] The control unit 62 of the control device 60 sets the target temperature Tg [°C] related to the control of the heater 31 according to the flowchart shown in FIG. 2. The target temperature Tg is the temperature that the fluid flowing into the heater core 14 of the air conditioner 10 should aim for in the control system A10.

[0035] As shown in FIG. 2, in the control unit 62 of the control device 60, determinations are made for steps S11, S12, S13, and S14 for setting the target temperature Tg. In step S11, it is determined whether there is a defrosting request for the capacitor 22. In step S12, it is determined whether there is an operation request for the air conditioner 10. Generally, the operation request for the air conditioner 10 corresponds to a heating request. The presence or absence of the operation request for the air conditioner 10 is determined, for example, based on the operating state of the blower 12 of the air conditioner 10. In step S13, it is determined whether there is a temperature increase request for the storage battery 32. In step S14, after setting the delay time td [seconds], a comparison is made with the elapsed time t [seconds] (hereinafter referred to as "elapsed time t") since the defrosting request for the capacitor 22 was made. The delay time td is determined based on the map of the delay time td shown in FIG. 3. The map of the delay time td is represented by a function with the power supply power [kW] to the heater 31 immediately before the defrosting request for the capacitor 22 as a variable. The map of the delay time td is preset in the control unit 62.

[0036] Based on the determinations of step S11, step S12, step S13, and step S14 shown in FIG. 2, the control unit 62 of the control device 60 selects one of case 0, case 1, case 2, case 3, and case 4 related to the setting of the target temperature Tg. Hereinafter, each case will be described.

[0037] When case 0 is selected, the control by the control system A10 is terminated. In case 0, it corresponds to the case where there is no defrosting requirement for the capacitor 22, or the case where there is a defrosting requirement for the capacitor 22 and there are no operation requirements for the air conditioner 10 and the temperature increase requirement for the storage battery 32. Here, when there are no both the operation requirement for the air conditioner 10 and the temperature increase requirement for the storage battery 32, since the heat exchanger 23 does not operate, the heat of the fluid flowing in the first pipeline 41 is not conducted to the fluid flowing in the second pipeline 42. In this case, only the heat generated due to the compression of the fluid caused by the operation of the compressor 21 is used for defrosting the capacitor 22.

[0038] When case 1 is selected, the first target temperature Tg1 [°C] is applied as the target temperature Tg. In case 1, it corresponds to the case where there is a defrosting requirement for the capacitor 22 and there is only a temperature increase requirement for the storage battery 32. The first target temperature Tg1 is given by the following formula.

Equation

[0039] Here, the first temperature t1 [°C] is the temperature of the fluid compressed by the compressor 21 as described above and flowing into the heat exchanger 23. The first correction temperature K1 [°C] is a corrected value considering the third temperature t3 which is the temperature of the storage battery 32. The first correction temperature K1 is determined based on the map of the first correction temperature K1 shown in FIG. 4. The map of the first correction temperature K1 is represented by a function with the third temperature t3 [°C] as a variable. The map of the first correction temperature K1 is preset in the control unit 62 of the control device 60. The fluid correction temperature Kf [°C] is a corrected value considering the temperature fluctuation of the fluid flowing through the first pipeline 41. The fluid correction temperature Kf is, for example, a constant set in the range of -5°C to 5°C. The reference temperature Tb [°C] corresponds to the upper limit value of the temperature that the fluid flowing into the heater core 14 of the air conditioner 10 should maintain during the defrosting of the capacitor 22. The fluid correction temperature Kf and the reference temperature Tb are preset in the control unit 62.

[0040] When Case 2 is selected, the second target temperature Tg2 [°C] is applied as the target temperature Tg. In Case 2, it corresponds to the case where there is a defrosting requirement for the capacitor 22 and there is only an operation requirement for the air conditioner 10. Here, in Case 2, it is selected on the condition that the elapsed time t ≧ the delay time td is satisfied. The second target temperature Tg2 is given by the following formula.

Equation

[0041] Here, the heating required temperature Th [°C] is the temperature that the fluid flowing into the heater core 14 of the air conditioner 10 should maintain during the operation of the air conditioner 10. The heating required temperature Th is set based on the target blow-out temperature Tga [°C] of the air flowing down the second passage 112 of the housing 11 of the air conditioner 10 (see FIG. 1). The target blow-out temperature Tga corresponds to the desirable temperature of the air sent out from various blow-out ports (not shown) provided in the vehicle cabin. The factors for determining the target blow-out temperature Tga include, in addition to the predetermined vehicle cabin temperature set by the vehicle occupant, the outside air temperature, the solar radiation amount, and the like. A map of the heating required temperature Th corresponding to the target blow-out temperature Tga is preset in the control unit 62 of the control device 60. The second correction temperature K2 [°C] is a correction value considering the target blow-out temperature Tga. The second correction temperature K2 is determined based on the map of the second correction temperature K2 shown in FIG. 5. The map of the second correction temperature K2 is represented by a function with the target blow-out temperature Tga as a variable. The map of the second correction temperature K2 is preset in the control unit 62 of the control device 60.

[0042] When Case 3 is selected, the third target temperature Tg3 [°C] is applied as the target temperature Tg. Case 3 corresponds to the case where there is a defrosting requirement for the capacitor 22 and there are both an operation requirement for the air conditioner 10 and a temperature increase requirement for the storage battery 32. Here, in Case 3, similar to Case 2, it is a selection requirement that the elapsed time t ≧ the delay time td is satisfied. The third target temperature Tg3 is given by the following formula.

Equation

[0043] When Case 4 is selected, the target upper limit temperature Tgu [°C] is applied as the target temperature Tg. Case 4 corresponds to the case where there are both a defrosting requirement for the capacitor 22 and an operation requirement for the air conditioner 10, and the elapsed time t < the delay time td. That is, Case 4 targets the case where the elapsed time t is significantly shorter compared to each of Case 2 and Case 3. The target upper limit temperature Tgu is, for example, 75°C.

[0044] After the target temperature Tg corresponding to any one of Case 1, Case 2, Case 3, and Case 4 is set in the control unit 62 of the control device 60, the control unit 62 controls the heater 31 so that the aforementioned second temperature t2 becomes the target temperature Tg. When t2 < Tg, the heater 31 is operated. When t2 ≥ Tg, the heater 31 is stopped.

[0045] The target temperature Tg in the control unit 62 of the control device 60 is updated at a constant cycle. The cycle is, for example, 1 second. The control unit 62 controls the heater 31 based on the updated target temperature Tg.

[0046] Next, the operation and effect of the control system A10 will be described.

[0047] The control system A10 includes a first pipeline 41, a second pipeline 42, a compressor 21, a condenser 22, an air conditioner 10, a heater 31, a heat exchanger 23, and a control device 60. The compressor 21 and the condenser 22 are connected to the first pipeline 41. The air conditioner 10 and the heater 31 are connected to the second pipeline 42. The heat exchanger 23 mutually exchanges the heat of the fluids flowing in each of the first pipeline 41 and the second pipeline 42. The fluid flowing in the first pipeline 41 is compressed by the compressor 21. The fluid flowing in the second pipeline 42 is heated by the heater 31. When there is a defrosting requirement for the condenser 22, the control device 60 controls the heater 31. By adopting this configuration, the temperature of the fluid flowing in the first pipeline 41 rises. Thereby, the defrosting of the condenser 22 is performed by supplying the heat of the fluid to the condenser 22. At the same time, since the temperature of the fluid flowing in the second pipeline 42 also rises, the heat dissipation from the fluid flowing in the first pipeline 41 to the fluid flowing in the second pipeline 42 via the heat exchanger 23 is suppressed. Therefore, according to this configuration, in the control system A10, it is possible to more stably supply heat to the condenser 22 during the defrosting of the condenser 22.

[0048] In control system A10, the air conditioner 10 has a heater core 14 connected to the second pipeline 42. When there is an operation request for the air conditioner 10, the control device 60 controls the heater 31 after setting the target temperature Tg (the second target temperature Tg2 and the third target temperature Tg3) of the fluid flowing into the heater core 14. By adopting this configuration, mainly when there is a heating requirement, while stably supplying heat to the capacitor 22, the air flowing through the air conditioner 10 can be heated to a predetermined temperature by the heater core 14.

[0049] Control system A10 further includes a third pipeline 43 connected to the second pipeline 42 and a storage battery 32 connected to the third pipeline 43. When there is a temperature increase request for the storage battery 32, the control device 60 controls the heater 31 after setting the target temperature Tg (the first target temperature Tg1 and the third target temperature Tg3) of the fluid flowing into the heater core 14 of the air conditioner 10. Here, the fluid flowing into the heater core 14 is also used for increasing the temperature of the storage battery 32. Therefore, by adopting this configuration, while stably supplying heat to the capacitor 22, the temperature of the storage battery 32 can be increased to a predetermined temperature.

[0050] When setting the target temperature Tg (the first target temperature Tg1, the second target temperature Tg2, and the third target temperature Tg3), the reference temperature Tb is taken as a factor. The reference temperature Tb corresponds to the upper limit value of the temperature that the fluid flowing into the heater core 14 of the air conditioner 10 should maintain during defrosting of the capacitor 22. By adopting this configuration, since the upper limit of the target temperature Tg is set, excessive heating by the heater 31 is regulated. As a result, while stably supplying heat to the capacitor 22, the power consumption by the heater 31 can be suppressed.

[0051] When there is an operation request for the air conditioner 10, when setting the target temperature Tg, a comparison is made between the delay time td and the elapsed time t. When the elapsed time t < the delay time td, the target upper limit temperature Tgu is applied as the target temperature Tg. By adopting this configuration, when there is both a defrosting request for the capacitor 22 and an operation request for the air conditioner 10, if the elapsed time t is extremely short, the control device 60 controls the heater 31 so that the temperature of the fluid flowing into the heater core 14 of the air conditioner 10 becomes higher. Thereby, a temporary decrease in the target blowing temperature Tga of the air flowing through the air conditioner 10 can be suppressed, and a predetermined heating performance can be maintained.

[0052] The present invention is not limited to the above-described embodiments. The specific configuration of each part of the present invention can be freely designed in various ways.

Explanation of Reference Numerals

[0053] A10: Control system 10: Air conditioner 11: Housing 111: First passage 111A: Intermediate path 112: Second passage 12: Blower 13: Evaporator 14: Heater core 15: Air mix door 21: Compressor 22: Capacitor 23: Heat exchanger 31: Heater 32: Storage battery 33: Pump 41~43: First pipeline ~ Third pipeline 49: Valve 51~53: First temperature sensor ~ Third temperature sensor 60: Control device 61: Temperature detection unit 62: Control unit Tg: Target temperature

Claims

1. A first pipeline and a second pipeline through which fluid flows respectively, A compressor and a condenser connected to the first pipeline, An air conditioner and a heater connected to the second pipeline, A heat exchanger that mutually exchanges the heat of the fluid flowing in each of the first pipeline and the second pipeline, A control device that controls the heater, and is provided with, The fluid flowing in the first pipeline is compressed by the compressor, The fluid flowing in the second pipeline is heated by the heater, When there is a defrosting requirement for the condenser, the control device controls the heater, an air conditioning control system.

2. The air conditioner has a heater core connected to the second pipeline, When there is an operation requirement for the air conditioner, the control device sets the target temperature of the fluid flowing into the heater core and then controls the heater, the air conditioning control system according to Claim 1.

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