KR20200061457A - Cooling and heating system for vehicle - Google Patents

Abstract

The present invention relates to a cooling and heating system for a vehicle, capable of improving heating performance and battery efficiency. According to the present invention, the cooling and heating system for a vehicle comprises: an integrated chiller; a first coolant line; a second coolant line arranged to be separated from the first coolant line; a second bypass line; a third bypass line; and a coolant control means connecting the first coolant line to the second coolant line and controlling the flow of coolant.

Description

{Cooling and heating system for vehicle}

The present invention relates to a vehicle air conditioning system that enables cooling or heating of a vehicle interior.

A vehicle air conditioner typically includes a cooling system for cooling a vehicle interior and a heating system for heating a vehicle interior. The cooling system is configured to heat the air passing through the outside of the evaporator with a refrigerant flowing inside the evaporator to change it to cold, so as to cool the vehicle interior, and the heating system passes outside the heater core on the heater core side of the cooling water cycle. It is configured to heat the vehicle interior by changing air to heat by exchanging heat with cooling water flowing inside the heater core.

Meanwhile, a heat pump system capable of selectively performing cooling and heating by converting a flow direction of a refrigerant by using one refrigerant cycle, which is different from the above-described vehicle air conditioner, is applied, for example, two heat exchangers , It has a direction control valve that can switch the flow direction of the refrigerant. Therefore, cooling and heating are possible according to the flow direction of the refrigerant by the direction control valve.

Various types of vehicle heat pump systems have been proposed, and a typical example is illustrated in FIG. 1.

The vehicle heat pump system illustrated in FIG. 1 includes a compressor 30 that compresses and discharges refrigerant, an indoor heat exchanger 32 that dissipates refrigerant discharged from the compressor 30, and is installed in a parallel structure. The first expansion valve 34 and the first bypass valve 36 and the first expansion valve 34 or the first bypass valve 36 for selectively passing the refrigerant passing through the heat exchanger 32 are provided. The outdoor heat exchanger (48) for heat-exchanging the refrigerant that has passed, the evaporator (60) for evaporating the refrigerant that has passed through the outdoor heat exchanger (48), and the refrigerant that has passed through the evaporator (60) are vapor and liquid. The accumulator 62 for separating the refrigerant, the refrigerant supplied to the evaporator 60, the internal heat exchanger 50 for exchanging the refrigerant returning to the compressor 30, and the refrigerant supplied to the evaporator 60 are optional It is installed in parallel with the second expansion valve 56 to expand, and the second expansion valve 56 to selectively connect the outlet side of the outdoor heat exchanger 48 and the inlet side of the accumulator 62. It comprises a second bypass valve (58). In Fig. 1, reference numeral 10 denotes an air conditioning case in which the indoor heat exchanger 32 and an evaporator 60 are built, reference numeral 12 denotes a temperature control door to control the mixing amount of cold and warm air, reference numeral 20 denotes an inlet of the air conditioning case Each blower installed in the represents.

According to the conventional vehicle heat pump system configured as described above, when the heating mode is activated, the first bypass valve 36 and the second expansion valve 56 are closed, and the first expansion valve 34 and the second bypass The pass valve 58 is opened. In addition, the temperature control door 12 operates as shown in FIG. 1. Therefore, the refrigerant discharged from the compressor 30 is an indoor heat exchanger 32, a first expansion valve 34, an outdoor heat exchanger 48, a high pressure part 52 of the internal heat exchanger 50, a second bypass valve ( 58), the accumulator 62 and the low pressure part 54 of the internal heat exchanger 50 are sequentially returned to the compressor 30. That is, the indoor heat exchanger 32 serves as a heater, and the outdoor heat exchanger 48 serves as an evaporator.

When the cooling mode is activated, the first bypass valve 36 and the second expansion valve 56 are opened, and the first expansion valve 34 and the second bypass valve 58 are closed. In addition, the temperature control door 12 closes the passage of the indoor heat exchanger 32. Therefore, the refrigerant discharged from the compressor 30 is an indoor heat exchanger 32, a first bypass valve 36, an outdoor heat exchanger 48, a high pressure part 52 of the internal heat exchanger 50, a second expansion valve 56 ), the evaporator 60, the accumulator 62 and the low pressure portion 54 of the internal heat exchanger 50, which in turn returns to the compressor 30. At this time, the indoor heat exchanger 32 closed by the temperature control door 12 serves as a heater as in the heating mode.

However, in the vehicle heat pump system, in the heating mode, the indoor heat exchanger 32 installed inside the air conditioning case 10 serves as a heater, that is, heat is radiated to perform heating, and the outdoor heat exchanger 48 is It is installed on the outside of the air conditioning case 10, that is, installed on the front side of the engine room of the vehicle, and thus acts as an evaporator to exchange heat with outside air, that is, to absorb heat.

At this time, when the outdoor air temperature falls below zero or when an outdoor heat exchanger 48 has an idea, the outdoor heat exchanger 48 hardly absorbs heat, and thus the refrigerant temperature and pressure in the system are lowered and the air discharged into the car interior. There was a problem that the heating performance is lowered due to the fall of the temperature.

In order to solve the above problem, domestic patent registration no. 10-1342931 performs a defrosting mode when an outdoor heat exchanger is implanted, so that the refrigerant bypasses the outdoor heat exchanger and recovers waste heat of vehicle electrical equipment through a heat supply means. , In order to continue heating even when the outdoor heat exchanger is implanted, as well as when the outside temperature is below zero.

However, depending on the idea of the outdoor heat exchanger or the outside temperature, the refrigerant bypasses the outdoor heat exchanger and uses only the waste heat of the vehicle electronics as a heat source. There is a problem that the heating performance is deteriorated because the amount of waste heat recovery of the electrical equipment is deteriorated.

In addition, the conventional heat pump system, there is a problem in that only a cooling and heating mode, there is no heat exchange function of the vehicle battery, there is a need to additionally configure a separate device and a flow path for cooling the battery for cooling the battery. On the other hand, when the air heat and the coolant heat are used in series, the flow path becomes complicated due to the line configuration of bypassing the outdoor capacitor during defrosting. Therefore, there are disadvantages of increasing the number of parts and weight and complicating the refrigerant flow path by applying multiple directional valves for heating and cooling.

The present invention can improve the heating performance by using the waste heat of the electric field and the waste heat of the battery in addition to the recovery of the refrigerant accumulated in the outdoor heat exchanger, and eliminate the accumulation of the refrigerant and refrigeration oil in the outdoor condenser in the heating mode, and reduce the flow path. The purpose of the present invention is to provide a vehicle air conditioning system that is simple and efficient in thermal management of a battery.

In the present invention, in a cooling and cooling system for a vehicle in which a compressor, an indoor capacitor, an outdoor capacitor, and an evaporator are connected to a refrigerant circulation line through which refrigerant circulates, a first bypass line and a second bypass line are connected to the refrigerant circulation line. An integrated chiller connected to the compressor through the first electronic valve; A first cooling water line for circulating cooling water by connecting an electric field radiator and an electric field part disposed adjacent to the outdoor condenser and the integrated chiller; A second cooling water line disposed to be spaced apart from the first cooling water line, and circulating cooling water by connecting the integrated chiller and a vehicle battery; A second bypass line branched from the refrigerant circulation line between the outdoor condenser and the integrated chiller and bypassing the refrigerant passing through the outdoor condenser to the integrated chiller; A third bypass line branched from the refrigerant circulation line between the outdoor condenser and the evaporator and bypassing the refrigerant passing through the outdoor condenser to the compressor; And a cooling water control means for connecting the first cooling water line and the second cooling water line and controlling the flow of cooling water circulating to the first cooling water line and the second cooling water line, wherein the integrated chiller is in a heating mode. The refrigerant passing through the indoor condenser circulates to the first bypass line to recover waste heat from the electric field, and when cooling the battery, the refrigerant passing through the outdoor condenser circulates to the second bypass line to cool the battery cooling water. In the cooling mode, in the cooling mode, the refrigerant passing through the outdoor condenser is circulated through the refrigerant circulation line to the evaporator.

The vehicle air-conditioning system according to the present invention is arranged to be spaced apart from the first cooling water line, the first cooling water line connecting the electric chiller, the electric radiator and the integrated chiller, and the second cooling water line connecting the integrated chiller and the battery. , By connecting the 1st and 2nd cooling water lines with the cooling water control means, in the heating mode, waste heat from the electric field and the waste heat from the battery can be used through the integrated chiller to improve heating performance. Refrigerant and freezing oil remaining in the outdoor condenser Can be recovered by the compressor through the third bypass line, thereby eliminating the lack of refrigerant and accumulation of refrigeration oil.

Also, in the cooling mode, it is possible to manage the battery by cooling the battery. Therefore, a single integrated chiller can perform the functions of the waste heat chiller and the battery chiller, so that a separate device and a flow path for cooling the battery are not required, and the number of parts is reduced and the refrigerant flow can be simplified. In addition, it is efficient because it can be expanded when heating and cooling the battery through one first electromagnetic valve installed at the front end of the integrated chiller.

In addition, it is possible to cool the electric parts as well as the battery through the electric radiator, so it is possible to reduce the cost by installing a separate electric radiator for cooling the battery, and the cooling of the battery by using the electric radiator, integrated chiller and heating means In addition, heating can be performed to maintain the optimum temperature of the battery to improve the efficiency of the battery.

1 is a configuration diagram showing a conventional heat pump system for a vehicle.
2 is a block diagram showing a vehicle air conditioning system according to an embodiment of the present invention.
3 is a view showing a state in which the refrigerant circulates in the cooling mode of the vehicle air conditioning system according to the present invention.
4 is a view showing a state in which a refrigerant circulates in a battery cooling mode in a cooling mode state of a vehicle air conditioning system according to the present invention.
5 is a view showing a state in which the refrigerant circulates in the heating mode of the vehicle air conditioning system according to the present invention.
6 is a view showing a state in which a refrigerant circulates in a dehumidifying mode in a heating mode state of a vehicle air conditioning system according to the present invention.
7 is a view showing a state in which a refrigerant circulates in a battery cooling mode in a heating mode state of a vehicle air conditioning system according to the present invention.
8 is a view showing integrally the first chiller and the integrated chiller of the vehicle air conditioning system according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventor appropriately explains the concept of terms in order to explain his or her invention in the best way. Based on the principle that it can be defined, it should be interpreted as meanings and concepts consistent with the technical spirit of the present invention.

2 to 7, the vehicle air conditioning system 1 according to an embodiment of the present invention includes a compressor 110, an indoor capacitor 120, an outdoor capacitor 130, and an evaporator 140. , An expansion valve 180 including an integrated chiller 150, a first cooling water line W1, a second cooling water line W2, and a cooling water control means 170, and including a first solenoid valve 181 ), an internal heat exchanger 190, a PTC heater 200, an accumulator 210, a refrigerant direction switching valve 220, a second solenoid valve 240, a third solenoid valve 230 may be further included.

Referring to FIG. 2, the vehicle air conditioning system 1 according to the present invention includes a compressor 110, an indoor condenser 120, an outdoor condenser 130, and an evaporator ( 140) is connected, and is preferably applied to an electric vehicle or a hybrid vehicle.

On the refrigerant circulation line (R), the first bypass line (R1) for bypassing the outdoor condenser (130) and the refrigerant circulation line (R) between the outdoor condenser (130) and the integrated chiller (150) A second bypass line (R2) for branching, bypassing the refrigerant passing through the outdoor condenser (130) to the integrated chiller (150), the first bypass line (R1) and the second bypass The pass line R2 is connected to the integrated chiller 150. In addition, a third bypass branching from the refrigerant circulation line (R) between the outdoor condenser 130 and the evaporator 140, bypassing the refrigerant passing through the outdoor condenser 130 to the compressor 110 Line R3 is provided.

The compressor 110, which is installed on the refrigerant circulation line R, receives power from an engine or a motor, drives it, sucks the refrigerant, compresses it, and discharges it in a high-temperature and high-pressure gas state.

The compressor 110 sucks and compresses refrigerant discharged from the evaporator 140 in the cooling mode and supplies it to the indoor condenser 120, and in the heating mode through the first bypass line R1. The refrigerant moving is sucked and compressed to be supplied to the indoor condenser 120.

In addition, in the dehumidifying mode in the heating mode, the compressor 110 passes through the outdoor condenser 130 in the refrigerant circulation line R and discharges the refrigerant from the evaporator 140 and the refrigerant circulation line ( R) passes through the outdoor condenser 130, passes through the second bypass line R2, sucks and compresses refrigerant delivered through the integrated chiller 150 and supplies it to the indoor condenser 120. .

The indoor condenser 120 is installed inside the air conditioning case (C) and is connected to the refrigerant circulation line (R) at the outlet side of the compressor 110, and air and the compressor flowing in the air conditioning case (C) The refrigerant discharged from the 110 is exchanged.

An evaporator 140 is installed inside the air conditioning case C, and the evaporator 140 is connected to an inlet refrigerant circulation line R of the compressor 110 to flow air in the air conditioning case C And heat exchange the refrigerant.

The indoor condenser 120 functions as a condenser in the heating mode, and the evaporator 140 serves as an evaporator in the cooling mode, and in the heating mode, the refrigerant is not supplied, and operation is stopped, and in the dehumidifying mode The refrigerant is partially supplied to serve as an evaporator.

The indoor condenser 120 and the evaporator 140 are installed to be spaced apart from each other at a predetermined interval inside the air conditioning case C, and the evaporator 140 and the air from the upstream side in the air flow direction in the air conditioning case C The indoor capacitor 120 is sequentially installed.

The temperature control door (D) is installed inside the air-conditioning case (C), and the temperature control door (D) is installed between the evaporator 140 and the indoor condenser 120 to connect the indoor condenser 120. It serves to control the amount of air passing through and the amount of air passing through.

The temperature control door (D) adjusts the amount of air bypassing the indoor condenser 120 and the amount of air passing through the indoor condenser 120 to control the temperature of the air discharged from the air conditioning case C. do.

Referring to FIG. 3, in the cooling mode, when the front side passage of the indoor condenser 120 is completely closed through the temperature control door D, cold air passing through the evaporator 140 is transferred to the indoor condenser 120. ) Is bypassed and supplied to the vehicle interior to perform maximum cooling.

Referring to FIG. 5, when the heating mode completely closes the passage for bypassing the indoor condenser 120 through the temperature control door D, the indoor condenser 120 serves as a condenser for all air. As it passes, it is converted to warm air, and this warm air is supplied to the interior of the vehicle, whereby maximum heating is performed.

The first bypass line (R1) and the second bypass line (R2) is an integrated chiller 150 is installed, the integrated chiller 150 is a refrigerant flowing through the first bypass line (R1) and The heat exchange of the cooling water circulating in the first cooling water line W1 to be described later and the refrigerant flowing in the second bypass line R2 and the cooling water circulating in the second cooling water line W2 described below are exchanged.

In the cooling mode illustrated in FIG. 3, refrigerant does not flow through the first bypass line R1 and the second bypass line R2, but in the cooling mode shown in FIG. 4, the refrigerant is in the second mode. The refrigerant flows into the bypass line R2, and the integrated chiller 150 heats the refrigerant in the second bypass line R2 and the cooling water in the second cooling water line W2 to cool the cooling water, thereby cooling the battery B ) Can be cooled, thereby enabling thermal management of the battery B.

Referring to FIG. 5, in the heating mode, the refrigerant circulates in the first bypass line R1. At this time, the integrated chiller 150 exchanges the refrigerant in the first bypass line (R1), the cooling water circulating in the first cooling water line (W1), and the cooling water circulating in the second cooling water line (W2), so that the waste heat of the electric field part Of course, it is possible to use the waste heat of the battery (B) to improve the heating performance.

As such, even in a mode in which the outdoor condenser 130 bypasses the outdoor condenser 130 according to the conditions of the idea or the outside temperature, the waste heat of the electric field and the waste heat of the battery B can be used, so the indoor discharge temperature due to the lack of heat source It is possible to minimize the change.

The full length radiator 132, the full length part and the integrated chiller 150 are connected by a first coolant line W1, and the integrated chiller 150 and the battery B of the vehicle have a second coolant line W2. It is connected by, the first cooling water line (W1) and the second cooling water line (W2) is connected by a cooling water control means (170).

A reservoir tank (RT) for storing cooling water is installed in the first cooling water line (W1), and a second pump (P2) for circulating cooling water is installed in the second cooling water line (W2), and the cooling water control means ( A first pump P1 for circulating cooling water is installed in the connection line 172 of 170, and a bypass line 173 connected to the second cooling water line W2 is provided in the reservoir tank RT. It is preferred. The first coolant line W1 and the second coolant line W2 are connected by the bypass line 173, and the coolant overflowing from the first coolant line W1 centered on the reservoir tank RT is The second cooling water line W2 flows, and the cooling water overflowing from the second cooling water line W2 flows to the first cooling water line W1.

The first chilled water line (W1) has an integrated chiller (150), an electric field radiator (132), and a reservoir tank (RT) are sequentially connected in the flow direction of the coolant, and the second coolant line (W2) has a second pump. (P2), the battery (B), and the integrated chiller 150 are sequentially connected in the cooling water flow direction, and the second cooling water line W2 is a heating means for heating cooling water circulating to the battery B ( H) is preferably installed.

When the heating means (H) is installed in the second cooling water line (W2), the heating means (H) is required under the condition that the temperature of the battery (B) needs to be elevated, such as when the outside temperature, which is a low ambient temperature, drops below zero. The efficiency of the battery B is improved by heating the cooling water circulated to the battery B to optimally maintain the temperature of the battery B. It is preferable to use an electric heating heater as the heating means (H), and the heating means (H) is preferably installed on the inlet-side second cooling water line (W2) of the battery (B). The electric unit includes a motor, a charger, an inverter, and an electric power control unit (EPCU), which may be provided on a connection line 172 to be described later.

The cooling water regulating means 170 controls the flow of cooling water circulating to the first cooling water line W1 and the second cooling water line W2, and the cooling water regulating means 170 is connected to the connecting line 172 Valve 174. The first cooling water line (W1) and the second cooling water line (W2) are connected, so that in the heating mode, cooling water is circulated through the integrated chiller (150) while cooling the battery (B) to manage the heat of the battery (B). Make it possible. In addition, the connection line 172 is preferably provided with a first pump (P1) for circulating the cooling water. The first pump P1 is not limited to being provided in the connection line 172, and the first pump P1 may be provided in the first cooling water line W1. In addition, in the heating mode, it is possible to recover the waste heat of the electric field part, the waste heat of the battery B, the accumulated refrigerant of the outdoor capacitor 130, and the refrigeration oil through the integrated chiller 150.

The cooling water regulating means 170 connects the first cooling water line W1 and the second cooling water line W2 in parallel. The connection line 172 of the cooling water control means 170 connects the outdoor condenser 130 and the integrated chiller 150 in parallel, and the control valve 174 includes the first cooling water line W1 and the second It is installed in the cooling water line (W2) to control the flow of cooling water.

The connection line 172 is a line connecting the first cooling water line W1 connected to the reservoir tank RT and the second cooling water line W2 connected to the inlet side of the battery B, and the electric field It consists of a line connecting the first cooling water line (W1) connected to the inlet side of the radiator 132 and the second cooling water line (W2) connected to the outlet side of the integrated chiller 150, and the first cooling water line ( W1) and the second cooling water line W2 are connected in parallel.

The control valve 174 is a first direction switching valve 174a installed at the branch point of the inlet side first cooling water line W1 and the connection line 172 of the integrated chiller 150, and the integrated chiller ( 150) a second direction switching valve 174b installed at a branch point of the connection line 172 connected to the outlet side first cooling water line W1, and the integrated chiller connected to the connection line 172 ( It includes a third direction switching valve (174c) installed at the branch of the outlet side of the second cooling water line (W2) (174c), the first direction switching valve (174a), the second direction switching valve (174b) and , The third direction switching valve 174c is preferably made of a three-way valve.

On the front end of the integrated chiller 150 connected to the first bypass line R1 and the second bypass line R2 on the refrigerant circulation line R, the refrigerant supplied to the integrated chiller 150 is A first electromagnetic valve EXV1 for adjusting the flow rate is provided. That is, the first electromagnetic valve EXV1 is integrally installed with the integrated chiller 150 at the front end of the integrated chiller 150, and circulates along the first bypass line R1 to the integrated chiller 150. It is possible to control the flow rate of the supplied refrigerant and the flow rate of the refrigerant supplied to the integrated chiller 150 by circulating along the second bypass line R2.

3 and 4, the first electromagnetic valve EXV1 is closed in the cooling mode, and is opened in the battery cooling mode in the cooling mode. That is, expansion is possible during heating and cooling of the battery through one first electronic valve EXV1, so that the number of parts can be reduced and the flow path can be simplified.

On the other hand, referring to Figure 8, the integrated chiller 150 is connected to the compressor 110 through the first bypass line (R1) and the second bypass line (R2) to the refrigerant circulation line (R) and shear In the first electromagnetic valve EXV1 is installed. The integrated chiller 150 recovers waste heat from the electric field by circulating the refrigerant that has passed through the indoor condenser 120 in the heating mode to the first bypass line R1, and when the battery is cooled, the outdoor condenser ( 130) It is configured to cool the battery by circulating the refrigerant that has passed through the second bypass line (R2). Therefore, the integrated chiller 150 can cool the battery without an additional flow path for cooling the battery when cooling the battery, and serves as a waste heat chiller in the electric field when heating with one integrated chiller 150 and a battery chiller when cooling the battery. It is workable. Therefore, the integrated chiller 150 can cool the battery without an additional flow path for cooling the battery when cooling the battery. The integrated chiller 150 includes a refrigerant inlet 151, a refrigerant outlet 152, a first cooling water inlet 154a, a first cooling water outlet 154b, a second cooling water inlet 155a and a second cooling water It may include an outlet (155b).

The refrigerant inlet 151 is a flow path for supplying refrigerant to the integrated chiller 150, and the refrigerant circulating in the first bypass line R1 or the second bypass line R2 is the refrigerant inlet ( 151) is passed through the first electromagnetic valve (EXV1) to expand and is supplied to the integrated chiller 150.

The first cooling water inlet 154a is a flow path for introducing cooling water into the integrated chiller 150, and cooling water circulating through the first cooling water inlet 154a through the first cooling water line W1 is the integrated chiller. 150.

The second cooling water inlet 155a is a flow path for introducing cooling water into the integrated chiller 150, and the cooling water circulating through the second cooling water line W2 through the second cooling water inlet 155a is the integrated chiller. 150.

The first cooling water outlet 154b is a flow path for discharging cooling water to the outside of the integrated chiller 150, and cooling water flowing into the first cooling water inlet 154a through the first cooling water outlet 154b flows in. After heat exchange with the refrigerant, it is discharged to the outside of the integrated chiller 150.

The second cooling water outlet 155b is a flow path for discharging cooling water to the outside of the integrated chiller 150, and cooling water introduced into the second cooling water inlet 155a through the second cooling water outlet 155b flows in. After heat exchange with the refrigerant, it is discharged to the outside of the integrated chiller 150.

The refrigerant discharge port 152 is a flow path for discharging the refrigerant to the outside of the integrated chiller 150, after the refrigerant exchanges heat with the cooling water flowing into the first cooling water inlet 154a and the second cooling water inlet 155a. , It is discharged to the outside of the integrated chiller 150 through the refrigerant outlet (152). That is, in the heating mode and the battery cooling mode, the refrigerant flows into the refrigerant inlet 151, expands through the first electromagnetic valve EXV1, exchanges heat with cooling water, and passes through the refrigerant outlet 152 to the accumulator 210. Can leak.

Referring to FIG. 2, an expansion valve 180 is installed on the refrigerant circulation line R, and the expansion valve 180 is installed at the front end of the evaporator 140 and the temperature of the outlet refrigerant of the evaporator 140 In accordance with the temperature-sensitive valve for expanding the refrigerant, the expansion valve 180 preferably includes a first solenoid valve 181 that opens and closes the refrigerant circulation line R connected to the evaporator 140. .

An internal heat exchanger 190 is installed on the refrigerant circulation line R, and the internal heat exchanger 190 passes through the outdoor condenser 130 and the refrigerant supplied to the evaporator and the evaporator 140 to pass through the compressor. It serves to heat exchange the refrigerant supplied to (110) with each other.

A PTC heater 200 is provided inside the air-conditioning case C, and the PTC heater 200 is disposed adjacent to and connected to the indoor condenser 120 to supply insufficient heat source to the indoor condenser 120. It plays a role, and the PTC heater 200 can be installed or deleted as necessary.

The accumulator 210 is installed adjacent to the compressor 110, and the accumulator 210 separates the liquid refrigerant and the gaseous refrigerant among the refrigerants supplied to the compressor 110, and then uses only the gaseous refrigerant to the compressor 110. Supply.

The refrigerant circulation switching valve 220 that opens and closes the refrigerant circulation line R connected to the outdoor capacitor 130 is installed in the refrigerant circulation line R at the front end of the inlet side of the outdoor capacitor 130, The third bypass line R3 has a third solenoid valve 230 that opens and closes the third bypass line R3 so that refrigerant is selectively supplied from the refrigerant circulation line R to the compressor 110. It is preferably installed. The refrigerant direction switching valve 220 is for moving the refrigerant in three directions, so that the refrigerant is selectively supplied to the first bypass line (R1). That is, the refrigerant direction switching valve 220 is provided with a branch point of the refrigerant circulation line (R) and the first bypass line (R1), so that the refrigerant is selectively outdoor by opening and closing the refrigerant direction switching valve (220). It can be supplied to the condenser 130 and the first bypass line (R1).

4, 6 and 7, the first solenoid valve 181, the second solenoid valve 240, the third solenoid valve 230, and the first direction switching valve (174a) , The refrigerant circulation line (R), the first bypass line (R1), the second bypass line (R2) through the control of the second direction switching valve (174b) and the third direction switching valve (174c), The flow of the refrigerant to the third bypass line (R3) and the cooling water flow between the first cooling water line (W1) and the second cooling water line (W2) are variously controlled.

4 is a battery cooling mode in a cooling mode, the cooling water cooled in the full-length radiator 132 circulates through the connection line 172 to the second cooling water line W2 to cool the battery B, and The cooling water cooled in the integrated chiller 150 is also circulated to the battery B through the second cooling water line W2 to control the cooling water control means 170 to cool the battery B.

That is, the cooling water cooled in the full-length radiator 132 of the first cooling water line W1 and the cooling water cooled in the integrated chiller 150 of the second cooling water line W2 are circulated to the battery B, and the battery ( B) is cooled. At this time, the refrigerant is not circulated to the first bypass line R1 side of the integrated chiller 150, and the refrigerant is circulated to the second bypass line R2 side of the integrated chiller 150.

FIG. 6 is a dehumidifying mode in a heating mode. Looking at the flow of the cooling water, the cooling water control means circulates the cooling water heated in the electric field of the first cooling water line W1 to the battery B of the second cooling water line W2. It is preferable to control the 170 and to prevent the cooling water from circulating through the full-length radiator 132.

7 is a battery cooling mode in the heating mode, the cooling water heated in the electric field of the first cooling water line W1 and the cooling water heated in the battery B of the second cooling water line W2 in the second cooling water line The cooling water control means 170 is controlled to circulate to the battery B of (W2), wherein the refrigerant does not circulate to the first bypass line R1 side of the integrated chiller 150, and the integrated chiller ( It is preferable to control the refrigerant to be circulated to the second bypass line (R2) side of 150), and to prevent the cooling water from circulating through the full-length radiator 132.

When explaining the operation of the vehicle air conditioning system according to an embodiment of the present invention with reference to Figures 3 to 7.

3 is in the cooling mode, the flow of the refrigerant is the first solenoid valve 181, the refrigerant direction switching valve 220 is to move the refrigerant to the outdoor condenser 130. At this time, the first electromagnetic valve EXV1 and the third solenoid valve 230 installed at the front end of the integrated chiller 150 are controlled to be closed. That is, the refrigerant is a compressor 110, the indoor condenser 120, the refrigerant direction change valve 220, the outdoor condenser 130, the first solenoid valve 181, the evaporator 140, the accumulator 210 After circulating through the compressor 110 again, cooling of the car interior is performed. Looking at the flow of the cooling water in the cooling mode, the cooling water cooled in the electric field radiator 132 of the first cooling water line W1 is controlled by the cooling water control means 170 to circulate the reservoir tank RT and the electric field.

4 is a battery cooling mode in a cooling mode state, the flow of refrigerant is the first solenoid valve 181 is opened, the refrigerant direction switching valve 220 is to move the refrigerant to the outdoor condenser 130 do. At this time, the first electromagnetic valve EXV1 installed at the front end of the integrated chiller 150 is controlled to be opened, the third solenoid valve 230 is controlled to be closed, and the second solenoid valve 240 is opened. It is controlled as much as possible. That is, after a part of the refrigerant passes through the compressor 110 and the indoor condenser 120, the outdoor condenser 130 circulates to the evaporator 140 and the compressor 110, and the other part of the refrigerant communicates with the compressor 110. After passing through the indoor condenser 120, it is branched through the second bypass line R2 to cool the battery while circulating to the integrated chiller 150 and the compressor 110 to cool the car interior. Looking at the flow of cooling water in the cooling mode of the battery in the cooling mode, the cooling water cooled in the electric field radiator 132 circulates through the connection line 172 to the second cooling water line W2 to cool the battery B. , Cooling water cooled in the integrated chiller 150 is also circulated to the battery B of the second cooling water line W2 to control the cooling water control means 170 to cool the battery B.

5 is in the heating mode, the flow of refrigerant in the heating mode is the first solenoid valve 181 is closed, the refrigerant direction switching valve 220 moves the refrigerant to the first bypass line (R1) The first electromagnetic valve EXV1 and the third solenoid valve 230 installed at the front end of the integrated chiller 150 are opened, and the second solenoid valve 240 is controlled to close. That is, the refrigerant is transferred to the first electromagnetic valve EXV1 and the integrated chiller 150, the accumulator 210, and the compressor 110 through the compressor 110, the indoor capacitor 120, and the first bypass line R1. By circulation, the heating of the car interior is performed. In addition, the refrigerant remaining in the outdoor condenser 130 and the refrigeration oil can be recovered to the compressor 110 through the third bypass line 30 to solve the lack of refrigerant and accumulation of refrigeration oil. Looking at the flow of the cooling water in the heating mode, the cooling water heated in the electric field of the first cooling water line W1 and the cooling water heated in the battery B of the second cooling water line W2 are integrated into the second cooling water line W2 The cooling water control means 170 controls the circulation to the chiller 150.

6 is in the dehumidification mode in the heating mode, the first solenoid valve 181 is opened when looking at the flow of the refrigerant, and the refrigerant direction switching valve 220 moves the refrigerant to the outdoor condenser 130. In addition, the first electromagnetic valve EXV1 and the second solenoid valve 220 installed at the front end of the integrated chiller 150 are opened, and the third solenoid valve 230 is closed. That is, after a part of the refrigerant passes through the compressor 110 and the indoor condenser 120, the outdoor condenser 130 is circulated to the integrated chiller 150, the accumulator 210, and the compressor 110 to perform heating of the car interior. Is done. A part of the refrigerant passes through the compressor 110 and the indoor condenser 120, and then passes through the second solenoid valve 180 and the evaporator 140, and then circulates through the accumulator 210 and the compressor 110, thereby circulating outside heat. It is used as an additional heat source to increase the dehumidification efficiency of the car interior. In the dehumidification mode in the heating mode, looking at the flow of the cooling water, the cooling water control means 170 circulates the cooling water heated in the electric field of the first cooling water line W1 to the battery B of the second cooling water line W2. It is preferable to control the first bypass line (R1) so that the refrigerant does not circulate, and it is preferable to control the coolant to not circulate through the full-length radiator (132).

7 is a battery cooling mode in a heating mode, and when looking at the flow of the refrigerant, the refrigerant solenoid valve 181 is closed to the outdoor condenser 130 when the first solenoid valve 181 is closed. The first solenoid valve EXV1 and the second solenoid valve 240 installed at the front end of the integrated chiller 150 are controlled to be opened, and the third solenoid valve 230 is controlled to be closed. That is, after the refrigerant passes through the compressor 110 and the indoor condenser 120, the outdoor condenser 130 and the second bypass line R2 pass through the integrated chiller 150 to the accumulator 210 and the compressor. While circulating to (110), while using external heat as an additional heat source, it increases the heating efficiency of the car interior. In the battery cooling mode in the heating mode, looking at the flow of the cooling water, the cooling water heated in the electric field of the first cooling water line W1 is controlled to circulate to the integrated chiller 150 of the second cooling water line W2, and the second It is preferable to control the cooling water regulating means 170 to circulate the cooling water heated in the battery B of the cooling water line W2 to the integrated chiller 150, and to prevent the cooling water from being circulated by the full-length radiator 132.

The vehicle air conditioning system according to the present invention, the first cooling water line (W1) connecting the electric unit, the electric radiator (132) and the integrated chiller (150), and the first cooling water line (W1) are spaced apart from the integrated chiller The second cooling water line (W2) connecting the 150 and the battery (B) is installed, and the first and second cooling water lines (W1, 2) are connected to the cooling water control means (170) to integrate the chiller in the heating mode ( 150) can use the waste heat of the electric field and the waste heat of the battery to improve the heating performance. In the cooling mode, the battery can be cooled to manage the heat of the battery. Therefore, since the functions of the waste heat chiller and the battery chiller can be performed with one integrated chiller 150, a separate device and a flow path for cooling the battery are not required, thereby reducing the number of components and simplifying the refrigerant flow path. In addition, it is efficient because it can expand during heating and cooling of the battery through one first electromagnetic valve EXV1 installed at the front end of the integrated chiller 150.

In addition, the electric field radiator 132 can be used to cool the electric field as well as the battery (B), so it is not necessary to install a separate electric field radiator for cooling the battery, thereby reducing the cost, and the electric field radiator 132 and the integrated chiller ( 150) and the heating means (H) can be performed not only for cooling of the battery B, but also for heating, so that the temperature of the battery B is optimally maintained to improve the efficiency of the battery.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

1: Vehicle air-conditioning system 110: Compressor
120: indoor condenser 130: outdoor condenser
132: battlefield radiator 140: evaporator
150: integrated chiller 151: refrigerant inlet
152: refrigerant outlet 154a: the first cooling water inlet
154b: 1st cooling water outlet 155a: 2nd cooling water inlet
155b: second cooling water outlet 170: cooling water control means
172: Connection line 173: Bypass line
174: control valve 180: expansion valve
181: first solenoid valve 190: internal heat exchanger
200: PTC heater 210: accumulator
220: refrigerant direction switching valve 230: third solenoid valve
240: second solenoid valve W1: first cooling water line
W2: Second cooling water line R: Refrigerant circulation line
R1: First bypass line R2: Second bypass line
R3: Third bypass line B: Battery
H: Heating means EXV1: First electromagnetic valve

Claims (17)

In the vehicle air-conditioning system in which a compressor, an indoor capacitor, an outdoor capacitor, and an evaporator are connected to a refrigerant circulation line through which the refrigerant circulates,
An integrated chiller connected to the compressor through a first bypass line and a second bypass line in the refrigerant circulation line, wherein a first electromagnetic valve is installed at the front end;
A first cooling water line that circulates cooling water by connecting an electric field radiator, an electric field part, and the integrated chiller disposed adjacent to the outdoor condenser;
A second cooling water line disposed to be spaced apart from the first cooling water line and circulating cooling water by connecting the integrated chiller and a vehicle battery;
A second bypass line branched from the refrigerant circulation line between the outdoor condenser and the integrated chiller and bypassing the refrigerant passing through the outdoor condenser to the integrated chiller;
A third bypass line branched from the refrigerant circulation line between the outdoor condenser and the evaporator and bypassing the refrigerant passing through the outdoor condenser to the compressor; And
It includes; cooling water control means for connecting the first cooling water line and the second cooling water line and adjusting the flow of cooling water circulating to the first cooling water line and the second cooling water line;
In the integrated chiller, in the heating mode, the refrigerant passing through the indoor condenser circulates to the first bypass line to recover waste heat from the electric field, and when the battery is cooled, the refrigerant passing through the outdoor condenser is the second bypass. Cooling water for cooling the battery by circulating in a line, and in a cooling mode, a cooling and cooling system for a vehicle that causes the refrigerant passing through the outdoor condenser to circulate through the refrigerant circulation line to the evaporator. The method according to claim 1,
The cooling water control means,
A connection line connecting the first cooling water line and the second cooling water line in parallel;
A cooling and heating system for a vehicle including a control valve installed in the first cooling water line for circulating cooling water through the integrated chiller and the second cooling water line for circulating cooling water through the integrated chiller to control the flow of cooling water. The method according to claim 2,
The control valve,
A first direction switching valve installed at a branch point of the inlet side first cooling water line and the connection line,
A second direction switching valve installed at a branch point of the connection line connected to the first cooling water line at the outlet side of the integrated chiller;
And a third direction switching valve installed at a branch point of a second cooling water line on the outlet side of the integrated chiller connected to the connection line. The method according to claim 2,
In the first cooling water line, a reservoir tank for storing cooling water is installed, a first pump for circulating cooling water is installed in the connection line, and a second pump for circulating cooling water is installed in the second cooling water line. . The method according to claim 4,
The reservoir tank is provided with a bypass line connected to a second cooling water line, and the first cooling water line and the second cooling water line are connected by the bypass line to overflow in the first cooling water line centering on the reservoir tank. The cooling water overflowing from the cooling water and the second cooling water line is a cooling and cooling system for a vehicle, characterized in that it flows into a second cooling water line and a first cooling water line, respectively. The method according to claim 1,
In the second cooling water line, a heating and cooling system for a vehicle is further provided with heating means for heating cooling water circulating in the battery. The method according to claim 1,
The first electronic valve,
It is installed at the front end of the integrated chiller and circulates along the first bypass line to control the flow rate of the refrigerant supplied to the integrated chiller and the second bypass line to regulate the flow rate of the refrigerant supplied to the integrated chiller. Vehicle air conditioning system. The method according to claim 1,
In front of the evaporator of the refrigerant circulation line, a temperature-sensitive expansion valve is installed to expand the refrigerant according to the temperature of the refrigerant at the outlet of the evaporator,
The expansion valve includes a first solenoid valve that opens and closes the refrigerant circulation line connected to the evaporator. The method according to claim 1,
On the refrigerant circulation line, an air-conditioning and heating system for a vehicle is installed in which an internal heat exchanger is installed to exchange heat between the refrigerant supplied to the evaporator and the refrigerant supplied to the compressor through the outdoor condenser. The method according to claim 1,
A PTC heater is installed adjacent to the indoor condenser to supply insufficient heating heat source,
An air-conditioning and cooling system for a vehicle in which an accumulator that separates a liquid refrigerant and a gaseous refrigerant from the refrigerant supplied to the compressor and supplies only the gaseous refrigerant to the compressor is installed. The method according to claim 1,
The first bypass line is branched from the refrigerant circulation line between the indoor condenser and the outdoor condenser, and is connected to the integrated chiller so that the refrigerant passing through the indoor condenser bypasses the outdoor condenser,
A refrigerant direction switching valve is installed at the branch point of the refrigerant circulation line and the first bypass line,
A first solenoid valve is installed at the front end of the evaporator on the refrigerant circulation line,
A second solenoid valve is installed on the second bypass line to open and close the second bypass line so that the refrigerant passing through the outdoor capacitor is supplied to the integrated chiller,
On the third bypass line, a vehicle air-conditioning and cooling system that installs a third solenoid valve that opens and closes the third bypass line so that refrigerant supplied from the refrigerant circulation line to the compressor is selectively supplied. The method according to claim 11,
In the cooling mode, in the state in which the first solenoid valve is open, the refrigerant direction switching valve causes the refrigerant to move to the outdoor condenser, and the first electromagnetic valve and the second solenoid valve and the third installed in the front end of the integrated chiller. The solenoid valve is a vehicle air conditioning system that is controlled to close. The method according to claim 11,
In the cooling mode, in the battery cooling mode, in the state in which the first solenoid valve is open, the refrigerant direction switching valve moves the refrigerant to the outdoor condenser, and the third solenoid valve is controlled to close, and the front end of the integrated chiller The first solenoid valve and the second solenoid valve installed in the vehicle air-conditioning and heating system is controlled to open. The method according to claim 11,
In the heating mode, in the state where the first solenoid valve is closed, the refrigerant direction switching valve causes the refrigerant to move to the first bypass line, and the first electromagnetic valve and the third solenoid valve installed at the front end of the integrated chiller are The vehicle is opened and closed, and the second solenoid valve is controlled to be closed. The method according to claim 11,
In the dehumidifying mode in the heating mode, the refrigerant direction switching valve moves the refrigerant to the outdoor condenser while the first solenoid valve is open, and the first electromagnetic valve and the second solenoid valve installed at the front end of the integrated chiller Is opened, and the third solenoid valve is closed. The method according to claim 11,
In the battery cooling mode in the heating mode, when the first solenoid valve is closed, the refrigerant direction switching valve causes the refrigerant to move to the outdoor condenser, and the first electromagnetic valve and the second installed on the front end of the integrated chiller. The solenoid valve is opened, and the third solenoid valve is controlled to close the vehicle air conditioning system. The method according to claim 1,
The integrated chiller,
A refrigerant inlet through which the refrigerant circulating in the first bypass line or the second bypass line is supplied to the integrated chiller through the first electromagnetic valve;
A first cooling water inlet through which cooling water circulating in the first cooling water line is supplied to the integrated chiller;
A first cooling water discharge port discharged to the outside of the integrated chiller after the cooling water flowing into the first cooling water inlet heat exchanges with the refrigerant flowing into the integrated chiller;
A second cooling water inlet through which cooling water circulating in the second cooling water line is supplied to the integrated chiller;
A second cooling water discharge port discharged to the outside of the integrated chiller after cooling water flowing into the second cooling water inlet heat exchanges with the refrigerant flowing into the integrated chiller;
The refrigerant flowing into the refrigerant inlet includes a refrigerant outlet that is discharged to the outside of the integrated chiller after heat exchange with the cooling water flowing into the first cooling water inlet and the second cooling water inlet,
The first electronic valve is an air conditioning system for a vehicle that is integrally installed with the integrated chiller.

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