KR20200060632A - Cooling and heating system for vehicle - Google Patents

Abstract

The present invention provides a cooling and heating system for a vehicle, in which a compressor, an indoor condenser, an outdoor condenser and an evaporator are connected to a refrigerant circulation line in which a refrigerant is circulated. In addition, the cooling and heating system comprises: a waste heat chiller which is connected to the compressor of the refrigerant circulation line by means of a first bypass line and a fourth bypass line; a battery chiller which is connected to the compressor of the refrigerant circulation line by means of a second bypass line; a first coolant line which connects an electrical field radiator and an electrical field unit arranged to be adjacent to the outdoor condenser to the waste heat chiller to circulate a coolant; a second coolant line which is arranged to be spaced apart from the first coolant line, and connects the battery chiller to the battery of a vehicle to circulate the coolant; a third bypass line which is branched from the refrigerant circulation line between the outdoor condenser and the evaporator to allow a refrigerant passing through the outdoor condenser to bypass towards the compressor; and a coolant adjustment means which connects the first coolant line to the second coolant line in order to adjust the flow of the coolant circulating to the first coolant line and the second coolant line. Therefore, in a heating mode, the refrigerant which has passed through the indoor condenser recovers waste heat of the electrical field unit by means of the waste heat chiller connected to the first bypass line. In addition, part of the refrigerant passing through the indoor condenser passes through the outdoor condenser by means of the fourth bypass line before being circulated to the compressor by means of the third bypass line to absorb outdoor air heat and to prevent congestion of the refrigerant and refrigerant oil in the outdoor condenser.

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 the interior of a vehicle and a heating system for heating the interior of the vehicle. The cooling system is configured to heat the air passing through the outside of the evaporator and the refrigerant flowing inside the evaporator to cool, thereby cooling 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 part 54 of the internal heat exchanger 50, in order to return 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 is a problem that the heating performance is lowered due to the fall of.

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 ambient temperature, the refrigerant bypasses the outdoor heat exchanger and uses only the waste heat of the vehicle electrical equipment as a heat source. And there is a problem that the heating performance is reduced because the amount of waste heat recovery of the electrical equipment is insufficient.

In addition, the conventional heat pump system, there is a problem in that only a heating and cooling mode, there is no heat exchange function of the vehicle battery to configure a separate device 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 along with the recovery of refrigerant accumulated in the outdoor heat exchanger, and cooling the batteries in the cooling mode and the heating mode, thereby enabling thermal management of the battery. , The object of the present invention is to provide a cooling and cooling system for a vehicle that improves heating performance by resolving the accumulation of refrigerant and refrigeration oil in the outdoor condenser in the heating mode and simplifying the refrigerant flow path.

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 fourth bypass line are connected to the refrigerant circulation line. A waste heat chiller connected to the compressor through; A battery chiller connected to the compressor through a second bypass line to the refrigerant circulation line; A first cooling water line that circulates cooling water by connecting an electric field radiator disposed near the outdoor condenser, an electric field part, and the waste heat chiller; A second cooling water line disposed to be spaced apart from the first cooling water line and circulating cooling water by connecting the battery chiller and a vehicle battery; 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 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, and passing through the indoor capacitor in the heating mode. One refrigerant recovers waste heat of the electric field part through a waste heat chiller connected to the first bypass line, and a portion of the refrigerant passing through the indoor capacitor passes through the outdoor capacitor through the fourth bypass line. Then, while circulating to the compressor through the third bypass line, it absorbs external heat and prevents accumulation of refrigerant and refrigeration oil in the outdoor condenser, and in the cooling mode, the refrigerant passing through the outdoor condenser is passed through the refrigerant circulation line. It provides a vehicle air conditioning system for cooling the battery while being circulated by the battery chiller and the evaporator.

The vehicle air conditioning system according to the present invention, the first cooling water line connecting the electric field unit, the electric field radiator and the waste heat chiller, and the first cooling water line are disposed apart from the second cooling water line to connect the battery chiller and the battery, , It is possible to improve the heating performance by connecting the first and second cooling water lines with the cooling water control means to use the waste heat of the electric field through the waste heat chiller and the waste heat of the battery through the battery chiller in the heating mode, and the battery in the cooling mode. By cooling, it is possible to manage the heat of the battery.

In addition, in the heating mode, after some refrigerant passes through the outdoor condenser by the refrigerant direction switching valve, it circulates to the compressor to prevent accumulation of the refrigerant and refrigeration oil in the outdoor condenser, block the shortage of refrigerant, and add external heat. It can be used as a heat source, and parallel heat absorption between the waste heat chiller and the outdoor condenser is possible to maintain the endothermic performance even during external defrost, increase the heating efficiency in the interior of the car, and use an electronic expansion valve to improve the heating performance and coolant flow. To reduce the quantity of parts and minimize the weight.

In addition, it is possible to cool the electric parts as well as the battery through the electric radiator, so it is not necessary to install a separate electric radiator for cooling the battery, thereby reducing the cost, and cooling the battery by using the electric radiator, battery 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 the refrigerant circulates in the battery cooling mode in the heating mode state 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 interpreted 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. , A waste heat chiller 150, a battery chiller 160, a first coolant line W1, a second coolant line W2, and a coolant control means 170, the first solenoid valve 181 It may further include an expansion valve 180, an internal heat exchanger 190, a PTC heater 200, an accumulator 210, a refrigerant direction switching valve 220, and a second solenoid valve 230.

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, a first bypass line R1 bypassing the outdoor condenser 130 and the evaporator 140 and a second bypass line R2 bypassing the evaporator 140. ), The waste heat chiller 150 is installed in the first bypass line R1, and the battery chiller 160 is connected to the second bypass line R2. 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. After passing the moving refrigerant and the outdoor condenser 130, some refrigerant circulating through the third bypass line R3 is sucked and compressed to be supplied to the indoor condenser 120.

In addition, the compressor 110, in the dehumidification mode in the heating mode, the refrigerant discharged from the waste heat chiller 150 on the first bypass line (R1) and a part of the circulation through the third bypass line (R3) After circulating the refrigerant and the refrigerant circulation line R, the refrigerant flowing out of the evaporator 140 is sucked and compressed to be supplied 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.

A waste heat chiller 150 is installed on the first bypass line R1, a battery chiller 160 is installed on the second bypass line R2, and the waste heat chiller 150 is the first bypass. The refrigerant flowing in the line R1 and the cooling water circulating in the first cooling water line W1, which will be described later, are exchanged, and the battery chiller 160 is described later with the refrigerant flowing in the second bypass line R2. The cooling water circulating in the second cooling water line W2 is 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 at this time, the battery chiller 160 exchanges 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, a refrigerant flows to the first bypass line R1 and some refrigerant flows to the outdoor condenser 130 through the refrigerant direction switching valve 220. The chiller 150 heats 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 is not only the battery It is possible to use the waste heat of (B) to improve the heating performance. That is, in the heating mode, the refrigerant flowing in the first bypass line (R1) is branched and flows to the outdoor condenser 130 by the refrigerant direction switching valve 220, through which the waste heat chiller is heated. It is configured to enable parallel heat absorption between the 150 and the outdoor condenser 130, so that the refrigerant passing through the indoor condenser 120 is connected to the first bypass line R1 through the waste heat chiller 150. In addition to recovering waste heat, some of the refrigerant that has passed through the indoor capacitor 120 passes through the outdoor capacitor 130 through the fourth bypass line R4, and then the third bypass line ( R3), while circulating to the compressor, can absorb outside heat and prevent accumulation of refrigerant in the outdoor condenser.

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. In addition, even when the refrigerant is in the mode of bypassing the outdoor condenser 130, some refrigerant flows through the refrigerant direction switching valve 220 to the outdoor condenser 130, and the refrigerant of the outdoor condenser 130 By eliminating the accumulation of oil, it is possible to prevent the lack of refrigerant due to the accumulation of refrigerant, and to prevent the heating performance from falling.

The electric unit, the electric radiator 132, and the waste heat chiller 150 are connected by a first cooling water line W1, and the battery chiller 160 and the battery B of the vehicle are a second cooling water line W2. ), The first coolant line W1 and the second coolant line W2 are connected by a coolant 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.

A waste heat chiller 150, an electric field radiator 132, and a reservoir tank RT are sequentially connected to the first cooling water line W1 in the cooling water flow direction, and a second pump is provided to the second cooling water line W2. (P2), the battery (B), and the battery chiller 160 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, the cooling water circulates through the battery chiller 160 while cooling the battery (B), thereby allowing thermal management 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, the waste heat of the electric field and the battery B and the accumulated refrigerant and refrigerant oil of the outdoor capacitor 130 can be recovered through the waste heat chiller 150.

The cooling water adjusting 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, the waste heat chiller 150, and the battery chiller 160 in parallel, and the control valve 174 is the first cooling water It is installed in the line (W1) and the second coolant line (W2) to control the flow of the coolant.

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 battery chiller 160, 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 waste heat chiller 150, and the waste heat chiller ( 150) the outlet side of the first cooling water line (W1) and the second direction switching valve (174b) installed at the branch of the connection line 172, and the battery chiller (160) 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), the first direction switching valve (174a), the second direction switching valve (174b) and, The three-way switching valve 174c is preferably made of a three-way valve.

A first electromagnetic valve EXV1 for adjusting the flow rate of the refrigerant supplied to the waste heat chiller 150 is provided on the first bypass line R1 connecting the refrigerant circulation line R and the waste heat chiller 150. , On the second bypass line (R2) connecting the refrigerant circulation line (R) and the battery chiller 160, a second electromagnetic valve (EXV2) for adjusting the flow rate of the refrigerant supplied to the battery chiller 160 is provided. do.

3 and 4, the first electromagnetic valve EXV1 closes the first bypass line R1 in the cooling mode and in the battery cooling mode in the cooling mode, and the second electromagnetic valve EXV2. Is closed in the cooling mode, in the heating mode, and in the dehumidifying mode in the heating mode, the second bypass line R2 is closed, and in the cooling mode in the battery cooling mode and in the heating mode in the battery cooling mode. The second bypass line R2 is opened.

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 direction switching valve 220 for opening and closing 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 second 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, through the refrigerant circulation line (R) in a heating mode in which the refrigerant is selectively supplied to the first bypass line (R1) The outdoor condenser 130 is formed such that some refrigerant is continuously supplied through the fourth bypass line R4. That is, the refrigerant can be selectively supplied to the outdoor condenser 130 by opening and closing the refrigerant direction switching valve 220. Meanwhile, the fourth bypass line R4 is branched from the refrigerant circulation line R between the indoor condenser 120 and the outdoor condenser 130 to be connected to the waste heat chiller 150. Incidentally, the 4 bypass line R4 may supply the refrigerant that branches off the first bypass line R1 and moves the first bypass line R1 to the outdoor capacitor 130.

4 and 6 and 7, the first solenoid valve 181, the refrigerant direction switching valve 220, the second solenoid valve 230, the first direction switching valve (174a) and , 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 coolant flow and the coolant flow between the first coolant line W1 and the second coolant line W2 are variously controlled by the third bypass line R3 and the fourth bypass line R3.

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 battery chiller 160 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 electric field radiator 132 of the first cooling water line W1 and the cooling water cooled in the battery chiller 160 of the second cooling water line W2 are circulated to the battery B, thereby causing the battery B ), And the coolant and the coolant are not circulated to the waste heat chiller 150, and the coolant is circulated to the battery chiller 160.

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 170, to prevent the refrigerant from circulating through the battery chiller 160, and to control 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 It is to control the cooling water control means 170 to circulate through the battery B of (W2), to control the refrigerant to circulate through the battery chiller 160, and to control the cooling water from circulating through the full-length radiator 132 desirable.

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 fourth bypass line R4 is closed, the first electromagnetic valve EXV1 installed on the first bypass line R1 and the second electromagnetic valve EXV2 installed on the second bypass line R2. ) And the second solenoid valve 230 is controlled to close. That is, the refrigerant 110, the indoor condenser 120, the refrigerant direction switching 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 fourth bypass line R4 is closed, and the first electromagnetic valve EXV1 and the second solenoid valve 230 installed in the first bypass line R1 are controlled to be closed, and the first 2 The second electromagnetic valve EXV2 installed in the bypass line R2 is controlled to be opened. That is, after the refrigerant passes through the compressor 110 and the indoor condenser 120, it circulates from the outdoor condenser 130 to the evaporator 140 and the compressor 110, and the other part of the refrigerant is a second bypass line (R2) ) Through the battery chiller 160 and the compressor 110 while performing cooling in the car interior. Looking at the flow of cooling water in the battery cooling mode in the cooling mode, the cooling water cooled in the electric radiator 132 circulates through the connection line 172 to the second cooling water line W2 to cool the battery B. The cooling water control means 170 controls the cooling water cooled in the battery chiller 160 to circulate to the battery B of the second cooling water line W2 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 opens the fourth bypass line (R4) to the refrigerant To be moved to the outdoor condenser 130, the second solenoid valve 230 and the first electromagnetic valve EXV1 installed in the first bypass line R1 are opened, and the second bypass line ( The second electromagnetic valve EXV2 installed in R2) is controlled to be closed. That is, the refrigerant is transferred to the first electromagnetic valve EXV1 and the waste heat chiller 150, the accumulator 210, and the compressor 110 through the compressor 110, the indoor capacitor 120, and the first bypass line R1. At the same time as circulating to perform heating of the car interior, the refrigerant passing through the first electromagnetic valve EXV1 through the compressor 110, the indoor condenser 120, and the first bypass line R1 is branched to the fourth By moving to the bypass line (R4), and by the refrigerant direction switching valve 220, the outdoor condenser 130, the second solenoid valve 230 to the accumulator 210 and the compressor 110 while circulating the outside heat Can be used as an additional heat source to increase the heating efficiency of the car interior. Looking at the flow of cooling water in the heating mode, the cooling water heated in the electric field of the first cooling water line W1 circulates to the battery chiller 160 of the second cooling water line W2, and the battery of the second cooling water line W2 The cooling water heated in (B) is controlled by the cooling water control means 170 to circulate to the battery chiller 160. Therefore, in the heating mode, the cooling water heat source and the air heat source may be connected in parallel to maintain the endothermic performance and improve the heating performance.

6 is a dehumidifying mode in a heating mode, and when looking at the flow of the refrigerant, the refrigerant direction switching valve 220 moves the refrigerant to the outdoor condenser 130 when the first solenoid valve 181 is opened. And the fourth bypass line (R4) is closed, the first electromagnetic valve (EXV1) installed in the first bypass line (R1) is opened, the second is installed in the second bypass line (R2) The electromagnetic valve EXV2 and the second solenoid valve 230 are closed. That is, in the dehumidifying mode in the heating mode, after the refrigerant passes through the compressor 110 and the indoor condenser 120, some of the refrigerant moves to the first bypass line R1 while the first electromagnetic valve EXV1 and waste heat chiller 150 and circulates through the compressor 110 to perform heating in the car interior. Then, the refrigerant passes through the outdoor condenser 130, the first solenoid valve 181, and the evaporator 140 through the refrigerant direction switching valve 220, and then circulates through the compressor 110 to additionally heat external heat. It increases the dehumidifying efficiency of the car interior while using it as 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, so that the refrigerant is not circulated by the battery chiller 160, and the cooling water is not circulated by the full-length radiator 132.

7 is a battery cooling mode in a heating mode state, and looking at the flow of refrigerant, when the first solenoid valve 181 is closed, the refrigerant direction switching valve 220 is the fourth bypass line (R4) By opening the refrigerant to move to the outdoor condenser 130, the second solenoid valve 230 is closed, the first electromagnetic valve (EXV1) and the second installed in the first bypass line (R1) The second electromagnetic valve EXV2 installed in the bypass line R2 is controlled to be opened. That is, after the refrigerant passes through the compressor 110 and the indoor condenser 120, some of the refrigerant moves to the first bypass line R1 while circulating through the waste heat chiller 150 and the compressor 110, and the vehicle interior Heating is performed. Then, some refrigerant is passed through the outdoor condenser 130 by the refrigerant direction switching valve 220, and then circulates through the battery chiller 160 in the second bypass line (R2) to the compressor 110, and the outside air Heat is used as an additional heat source to increase 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 battery chiller 160 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 battery chiller 160, and to prevent the cooling water from being circulated by the full-length radiator 132.

On the other hand, when looking at the flow of refrigerant in the battery cooling mode, the first solenoid valve 181 is closed, the refrigerant direction switching valve 220 causes the refrigerant to move to the outdoor condenser 130, and the 4 Bypass line (R4) is closed, the first electromagnetic valve (EXV1) and the second solenoid valve 230 installed on the first bypass line (R1) is controlled to be closed, the second bypass line The second electromagnetic valve EXV2 installed at (R2) may be controlled to be opened.

Accordingly, the present invention is arranged to be spaced apart from the first cooling water line W1 and the first cooling water line W1 connecting the electric field radiator 132 and the waste heat chiller 150, and the battery chiller 160 and the battery B A second cooling water line (W2) is installed to connect the first cooling water, and the first and second cooling water lines (W1, W2) are connected to the cooling water control means (170) through the waste heat of the electric field and the battery chiller (160). The waste heat of the battery B can be used to improve the heating performance, and in the cooling mode, the battery B can be cooled to manage the battery thermally. In addition, in the heating mode, a portion of the refrigerant passes through the outdoor condenser 130 by the refrigerant direction switching valve 220, and then circulates to the compressor 110 to prevent accumulation of refrigerant in the outdoor condenser 130, resulting in insufficient refrigerant. And increases the heating efficiency of the car interior while using outside heat as an additional heat source.

In addition, the electric field radiator 132 can be used to cool the electric field part as well as the battery B, thereby reducing the cost of installing a separate electric field radiator for cooling the battery, and the electric field radiator 132 and the battery chiller ( 160) 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: waste heat chiller 160: battery chiller
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 change valve
230: 2nd solenoid valve W1: 1st cooling water line
W2: Second cooling water line R: Refrigerant circulation line
R1: First bypass line R2: Second bypass line
R3: Third bypass line R4: Fourth bypass line
B: Battery H: Heating means

Claims (16)

In a vehicle air conditioning and cooling system, the compressor, the indoor condenser, the outdoor condenser, and the evaporator are connected to the refrigerant circulation line through which the refrigerant circulates,
A waste heat chiller connected to the compressor through a first bypass line and a fourth bypass line in the refrigerant circulation line;
A battery chiller connected to the compressor through a second bypass line to the refrigerant circulation line;
A first cooling water line that circulates cooling water by connecting an electric field radiator disposed near the outdoor condenser, an electric field part, and the waste heat chiller;
A second cooling water line disposed to be spaced apart from the first cooling water line, and circulating cooling water by connecting the battery chiller and a vehicle battery;
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 heating mode, the refrigerant passing through the indoor condenser recovers waste heat from the electric field through a waste heat chiller connected to the first bypass line, and some of the refrigerant passing through the indoor condenser passes through the fourth bypass line. After passing through the outdoor condenser through and circulating to the compressor through the third bypass line, it absorbs external heat and prevents accumulation of refrigerant and refrigeration oil in the outdoor condenser, and passes through the outdoor condenser in the cooling mode. An air conditioning system for a vehicle that cools a battery while allowing one refrigerant to circulate through the refrigerant circulation line to the battery chiller and 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;
The first cooling water line for circulating cooling water through the waste heat chiller and a second cooling water line for circulating cooling water through the battery chiller include a control valve for controlling 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 first cooling water line at the inlet side of the waste heat chiller 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 waste heat chiller;
And a third direction switching valve installed at a branch point of a second cooling water line on the outlet side of the battery 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, an air conditioning 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 bypass line connected to the waste heat chiller is provided with a first electromagnetic valve to adjust the flow rate of the refrigerant supplied to the waste heat chiller,
In the second bypass line connected to the battery chiller is provided with a second electronic valve for controlling the flow rate of the refrigerant supplied to the battery chiller vehicle air conditioning system. The method according to claim 1,
A temperature-sensitive expansion valve is installed at the front end of the evaporator of the refrigerant circulation line to expand the refrigerant according to the temperature of 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 through the outdoor condenser to the evaporator and the refrigerant supplied through the evaporator to the compressor. 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 system for a vehicle in which an accumulator for separating a liquid refrigerant and a gaseous refrigerant from the refrigerant supplied to the compressor and supplying 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 waste heat chiller to install the refrigerant passing through the condenser to bypass the outdoor condenser,
The fourth bypass line is branched from the refrigerant circulation line between the indoor condenser and the outdoor condenser, and is connected to the waste heat chiller.
It is provided at the branch point of the refrigerant circulation line and the fourth bypass line, is provided on the refrigerant circulation line in front of the inlet side of the outdoor capacitor, the refrigerant is connected to the outdoor capacitor to be supplied to the outdoor capacitor Install a refrigerant direction switching valve that opens and closes the refrigerant circulation line,
A first solenoid valve is installed at the front end of the evaporator on the refrigerant circulation line,
On the third bypass line, a vehicle air-conditioning and cooling system that installs a second solenoid valve that opens and closes the third bypass line so that the 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 opened, the refrigerant direction switching valve causes the refrigerant to move to the outdoor condenser, the fourth bypass line is closed, and the first bypass line is installed in the first bypass line. The first solenoid valve and the second solenoid valve installed in the second bypass line and the vehicle air conditioning system are controlled to be closed. 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 causes the refrigerant to move to the outdoor condenser, closes the fourth bypass line, and the first bypass. The first electromagnetic valve installed on the line and the second solenoid valve are controlled to be closed, and the second electronic valve installed on the second bypass line is controlled to be opened to the vehicle air conditioning system. 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 opens the fourth bypass line to move the refrigerant to the outdoor condenser, and the second solenoid valve and the first bypass The first electronic valve installed in the line is opened, and the second electronic valve installed in the second bypass line is controlled to be closed so that the vehicle air conditioning and heating system. The method according to claim 11,
In the dehumidification mode in the heating mode state, the refrigerant direction switching valve moves the refrigerant to the outdoor condenser while the first solenoid valve is open, and the fourth bypass line is closed and installed in the first bypass line. The first solenoid valve is opened, and the second solenoid valve and the second solenoid valve installed on the second bypass line are closed. The method according to claim 11,
In the battery cooling mode in the heating mode, while the first solenoid valve is closed, the refrigerant direction switching valve opens the fourth bypass line to move the refrigerant to the outdoor condenser, and the second solenoid valve is closed. And, the first electronic valve installed in the first bypass line and the second electronic valve installed in the second bypass line is controlled to open and open the vehicle air conditioning system.

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