KR20220060139A - Automotive heat pump system - Google Patents

Abstract

The present invention provides a heat pump system for a vehicle, which comprises a compressor, an indoor condenser, an outdoor heat exchanger, an integrated chiller, an evaporator, an expansion valve unit, an opening and closing valve unit, and a control unit.

Description

Automotive heat pump system

The present invention relates to a vehicle heat pump system, and more particularly, to a vehicle heat pump system that cools and cools a vehicle using refrigerant exchanged heat with coolant in an integrated chiller and air in an indoor condenser and an outdoor heat exchanger.

A vehicle air conditioner generally 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 cool the vehicle interior by heat-exchanging air passing through the outside of the evaporator on the evaporator side of the refrigerant cycle with the refrigerant flowing inside the evaporator to cool the vehicle interior. It is configured to heat the interior of the vehicle by converting air passing through the outside of the core to heat by heat-exchanging it with coolant flowing through the inside of the heater core.

On the other hand, different from the above-described vehicle air conditioner, a heat pump system that can selectively perform cooling and heating by changing the flow direction of a refrigerant using one refrigerant cycle is applied, for example, two heat exchangers. (that is, an indoor heat exchanger installed inside the air conditioning case to exchange heat with air blown into the vehicle interior, and an outdoor heat exchanger for heat exchange outside the air conditioning case), and a directional control valve capable of switching the flow direction of the refrigerant do. Accordingly, when the cooling mode is operated according to the flow direction of the refrigerant by the directional control valve, the indoor heat exchanger plays a role of a cooling heat exchanger, and when the heating mode is operated, the indoor heat exchanger serves as a heating heat exchanger will do

Various types of heat pump systems for vehicles have been proposed, and a representative example thereof is shown in FIG. 1 .

The vehicle heat pump system shown in FIG. 1 includes a compressor 30 for compressing and discharging a refrigerant, a high-pressure side heat exchanger 32 for dissipating heat from the refrigerant discharged from the compressor 30, and is installed in a parallel structure. The first expansion valve 34 and the first bypass valve 36 for selectively passing the refrigerant that has passed through the high-pressure side heat exchanger 32, and the first expansion valve 34 or the first bypass valve 36 ), an outdoor heat exchanger (48) for exchanging the refrigerant passing through outdoors, a low-pressure side heat exchanger (60) for evaporating the refrigerant that has passed through the outdoor heat exchanger (48), and the low-pressure side heat exchanger (60) An accumulator (62) that separates the refrigerant passing through into gaseous and liquid refrigerants, and an internal heat exchanger (50) for exchanging heat between the refrigerant supplied to the low-pressure side heat exchanger (60) and the refrigerant returning to the compressor (30) and a second expansion valve (56) for selectively expanding the refrigerant supplied to the low-pressure side heat exchanger (60), and installed in parallel with the second expansion valve (56) of the outdoor heat exchanger (48). and a second bypass valve (58) selectively connecting the outlet side and the inlet side of the accumulator (62).

In Fig. 1, reference numeral 10 denotes an air conditioning case in which the high-pressure side heat exchanger 32 and the low-pressure side heat exchanger 60 are built-in, reference numeral 12 denotes a temperature control door for controlling the mixing amount of cold and warm air, and reference numeral 20 denotes the above Each blower installed at the entrance of the air conditioning case is shown.

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

When the air conditioner mode (cooling mode) is operated, 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. do. In addition, the temperature control door 12 closes the passage of the high-pressure side heat exchanger 32 . Accordingly, the refrigerant discharged from the compressor 30 is the high-pressure side heat exchanger 32 , the first bypass valve 36 , the outdoor heat exchanger 48 , the high-pressure part 52 of the internal heat exchanger 50 , and the second expansion valve (56), the low-pressure side heat exchanger (60), the accumulator (62), and the low-pressure section (54) of the internal heat exchanger (50) is returned to the compressor (30) in that order. That is, the low-pressure side heat exchanger 60 serves as an evaporator, and the high-pressure side heat exchanger 32 closed by the temperature control door 12 serves as a heater in the same manner as in the heat pump mode. do.

As a conventional technique, reference may be made to Korean Patent Publication No. 10-2013-0101254 (2013.09.13.).

In the conventional heat pump system of the waste heat absorption type of the outdoor heat source, when an implantation occurs in the outdoor heat exchanger, the refrigerant flow is switched to the bypass line, and there is a problem that parts must be added when configuring the chiller and expansion valve for battery cooling. .

The present invention was created to solve the above problems, and it is possible to implement a battery cooling and heating mode without adding a battery chiller and an expansion valve, and it is possible to use an outdoor heat source and a cooling water waste heat source at the same time, and the heat source state Accordingly, an object of the present invention is to provide a vehicle heat pump system capable of selectively absorbing heat.

In order to achieve the above object, the present invention is a compressor that compresses the introduced refrigerant and discharges it in a gaseous state; an indoor condenser connected to the compressor by a first flow path, into which a high-temperature and high-pressure refrigerant discharged from the compressor flows in, and heats the room in a heating mode by exchanging the refrigerant with air flowing in the air conditioning case; an outdoor heat exchanger connected to the indoor condenser by a second flow path and heat-exchanging the refrigerant discharged from the indoor condenser with air introduced from the outside; an integrated chiller connected to the outdoor heat exchanger by a third passage, introducing a refrigerant discharged from the outdoor heat exchanger, exchanging heat with cooling water in a battery cooling cooling mode, and supplying the heat-exchanged refrigerant to the compressor through a fourth passage; It is provided on the fifth flow path connected to the fourth flow path after branching from the third flow path, and in the cooling mode or battery cooling cooling mode, the refrigerant discharged from the outdoor heat exchanger is introduced to vaporize the refrigerant and supplied to the vehicle interior an evaporator that cools the room by heat exchange with the air; It is provided on the front end of the integrated chiller on the second flow passage and the third passage, and at the front end of the evaporator on the fifth passage to selectively open and close the second passage, the third passage, and the fifth passage. an expansion valve unit for selectively expanding the refrigerant moving to the second flow passage, the third flow passage, and the fifth flow passage; It is provided on a sixth passage connected to the fourth passage after branching from the third passage adjacent to the outdoor heat exchanger, and on a seventh passage connected to the third passage after branching from the second passage, the sixth passage an opening/closing valve part selectively opening and closing the flow path and the seventh flow path; and a control unit for controlling operations of the expansion valve unit and the on/off valve unit in response to each mode.

In the heat pump system for a vehicle according to the present invention, the refrigerant supplied to the integrated chiller through the seventh passage in the heating mode and the heating and dehumidifying mode is provided at the front end of the branching point of the fifth passage on the third passage. A check valve for preventing movement to the outdoor heat exchanger through the third flow path may be further included.

In the heat pump system for a vehicle according to the present invention, the expansion valve unit is provided on the second flow path and includes: a first electromagnetic expansion valve for expanding the refrigerant that has passed through the indoor condenser and depressurizing it in a heating mode and a heating and dehumidifying mode; a second electronic expansion valve provided at the front end of the integrated chiller on a third flow path to expand and reduce the pressure of the refrigerant supplied to the integrated chiller in battery cooling/cooling mode, heating mode, and heating/dehumidifying mode; and the evaporator on the fifth flow path It is provided at the front end of the cooling mode, the battery cooling cooling mode, the heating and dehumidifying mode may include a solenoid expansion valve that expands the refrigerant supplied to the evaporator to reduce the pressure.

The opening/closing valve unit includes a first opening/closing valve provided on a sixth flow path connected to the fourth flow path after branching from the third flow path adjacent to the outdoor heat exchanger to selectively open and close the sixth flow path; may include a second on-off valve provided on a seventh passage connected to the third passage after branching from and selectively opening and closing the seventh passage, wherein the first on-off valve and the second on-off valve are 2 A way valve may be used.

In the cooling mode, the first electromagnetic expansion valve of the expansion valve unit provided on the second flow path may be opened, and the second electromagnetic expansion valve of the expansion valve unit provided on the third flow path is disposed on the sixth flow path. The first on-off valve of the on-off valve provided on the on/off valve part and the second on-off valve on the on-off valve part on the seventh flow passage may be closed, and the solenoid expansion valve of the expansion valve part on the fifth passage is provided in the evaporator. It is possible to expand the refrigerant supplied to the , the check valve may be opened.

In the battery cooling/cooling mode, the first electromagnetic expansion valve of the expansion valve unit provided on the second flow path may be opened, and the first opening/closing valve of the opening/closing valve unit provided on the sixth flow path and on the seventh flow path. The second opening/closing valve of the opening/closing valve unit provided in the The refrigerant supplied to the integrated chiller and the evaporator may be expanded, and the check valve may be opened.

In the heating mode, the first on/off valve of the on-off valve part provided on the sixth flow passage and the second on-off valve of the on-off valve part provided on the seventh flow passage may be opened, and the on/off valve provided on the fifth flow passage may be opened. The solenoid expansion valve of the on-off valve part may be closed, and the first electromagnetic expansion valve of the expansion valve part provided on the second flow path and the second electromagnetic expansion valve of the expansion valve part provided on the third flow path are respectively the The refrigerant supplied to the outdoor heat exchanger and the refrigerant supplied to the integrated chiller may be expanded, and the check valve may be closed.

In the heating/dehumidifying mode, the first on-off valve of the on-off valve part provided on the sixth flow passage and the second on-off valve of the on-off valve part provided on the seventh flow passage may be opened, and provided on the second flow passage The first electromagnetic expansion valve of the expansion valve unit, the second electromagnetic expansion valve of the expansion valve unit provided on the third flow path, and the solenoid expansion valve of the opening/closing valve unit provided on the fifth flow path are respectively the outdoor heat exchangers. The supplied refrigerant and the refrigerant supplied to the integrated chiller and the refrigerant supplied to the evaporator may be expanded, and the check valve may be closed.

In the heating mode and heating and dehumidification mode, when an idea occurs in the outdoor heat exchanger, the first electromagnetic expansion valve of the expansion valve, which is a heating expansion valve, is closed to block the flow of refrigerant supplied to the outdoor heat exchanger, thereby supplying refrigerant only from the integrated chiller. It is possible to defrost the outdoor heat exchanger while expanding.

The heat pump system for a vehicle according to the present invention includes a dehumidification passage connected to the solenoid expansion valve of the expansion valve unit provided on the fifth passage after branching from the second passage, and a dehumidification passage provided on the dehumidification passage may further include a dehumidification passage opening/closing valve selectively opening and closing the The check valve may be located at a rear end of the fifth flow path on the third flow path.

In the heating mode, the first on/off valve of the on-off valve part provided on the sixth flow passage and the second on-off valve of the on-off valve part provided on the seventh flow passage may be opened, and the on/off valve provided on the fifth flow passage may be opened. The solenoid expansion valve of the opening/closing valve unit and the dehumidification path opening/closing valve provided on the dehumidification flow path may be closed, and the first electromagnetic expansion valve of the expansion valve unit provided on the second flow path and provided on the third flow path The second electromagnetic expansion valve of the expansion valve unit may expand the refrigerant supplied to the outdoor heat exchanger and the refrigerant supplied to the integrated chiller, respectively, and the check valve may be closed.

In the heating and dehumidification mode, the first on-off valve of the on-off valve provided on the sixth flow passage, the second on-off valve of the on-off valve provided on the seventh passage, and the dehumidifying passage on the dehumidifying passage The valve may be opened, and the first electromagnetic expansion valve of the expansion valve unit provided on the second flow path and the second electromagnetic expansion valve of the expansion valve unit provided on the third flow path are refrigerant supplied to the outdoor heat exchanger, respectively. and the refrigerant supplied to the integrated chiller may be expanded, and the refrigerant moving to the dehumidification passage may be expanded while passing through the orifice hole of the expansion valve unit and then supplied to the evaporator, and the check valve may be closed.

The vehicle heat pump system according to the present invention can realize battery cooling and heating mode without adding a separate battery chiller and expansion valve, and can simultaneously absorb heat from an outdoor heat source and a coolant waste heat source, and selectively according to the heat source state Heating performance can be improved by enabling heat absorption.

1 is a block diagram showing a conventional vehicle heat pump system.
2 is a configuration diagram illustrating a vehicle heat pump system according to an embodiment of the present invention.
3 is a view illustrating a state in which a refrigerant is circulated in a cooling mode of the vehicle heat pump system shown in FIG. 2 .
FIG. 4 is a diagram illustrating a state in which a refrigerant is circulated in a battery cooling/cooling mode of the vehicle heat pump system shown in FIG. 2 .
FIG. 5 is a diagram illustrating a state in which a refrigerant is circulated in a heating mode of the vehicle heat pump system shown in FIG. 2 .
FIG. 6 is a view illustrating a state in which a refrigerant is circulated in a heating/dehumidifying mode of the vehicle heat pump system shown in FIG. 2 .
7 is a configuration diagram illustrating a vehicle heat pump system according to another embodiment of the present invention.
FIG. 8 is a diagram illustrating a state in which a refrigerant is circulated in a heating mode of the vehicle heat pump system shown in FIG. 7 .
9 is a view illustrating a state in which a refrigerant is circulated in a heating/dehumidifying mode of the vehicle heat pump system shown in FIG. 7 .

Hereinafter, preferred embodiments according to 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 conventional or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

2 to 6 , the vehicle heat pump system 100 according to an embodiment of the present invention includes a compressor 1100 , an indoor condenser 1200 , an outdoor heat exchanger 1300 , and an integrated chiller 1400 . ), an evaporator 1500 , an expansion valve unit 1600 , an on/off valve unit 1700 , and a control unit 1800 , and a check valve 1900 , a dehumidification passage DR, and a dehumidification passage opening and closing A valve 2000 may be further included.

2, the vehicle heat pump system 100 according to the present invention includes a compressor 1100, an indoor condenser 1200, an outdoor heat exchanger 1300, and an integrated chiller ( 1400) and the evaporator 1500 are connected, and preferably applied to an electric vehicle or a hybrid vehicle.

The compressor 1100 introduces and compresses the refrigerant through an input terminal connected to the flow path through which the refrigerant flows, and then discharges the compressed refrigerant to the flow path through the output terminal. ) is discharged.

An output terminal of the compressor 1100 is connected to a first flow path R1, and an input terminal of the indoor condenser 1200 and an output terminal of the compressor 1100 are connected through the first flow passage R1, and the compressor 1100 ), the compressed high-temperature and high-pressure refrigerant (gas) is output to the indoor condenser 1200 .

The indoor condenser 1200 is provided in an air conditioning case (not shown), and introduces a high-temperature and high-pressure refrigerant (gas) discharged from the compressor 1100, and supplies a heat source to the room through heat radiation to the surrounding air during heating. .

The indoor condenser 1200 introduces the high-temperature and high-pressure refrigerant (gas) discharged from the compressor 1100 through the first flow path R1. The indoor condenser 1200 condenses the high-temperature and high-pressure refrigerant (gas) flowing through the heat exchange with the air supplied into the vehicle interior through the air conditioning case (not shown), and heats the air with the condensation heat to heat the vehicle interior. make this happen A blower (not shown) is provided in the air conditioning case (not shown), and the blower (not shown) serves to supply outside air to the interior of the vehicle. The structure of the air conditioning case (not shown) and the process of supplying heat-exchanged air into the interior of the vehicle after the air conditioning case (not shown) introduces air to be heated are well-known technologies, and detailed descriptions thereof are to be omitted.

The output terminal of the indoor condenser 1200 is connected to one end of the second flow path R2 through which the refrigerant flows, and the other end of the second flow path R2 is connected to the outdoor heat exchanger 1300 . The outdoor heat exchanger 1300 discharges the incoming refrigerant to the third flow path R3 through the output terminal after heat exchange with the external air, and the refrigerant discharged to the third flow path R3 is the third flow path in the cooling mode. It is supplied to the evaporator 1500 through the fifth passage R5 branching from the flow passage R3, and in the battery cooling cooling mode, the integrated chiller 1400 and the integrated chiller 1400 through the third passage R3 and the fifth passage R5 It is supplied to the evaporator 1500 .

The integrated chiller 1400 is connected to the outdoor heat exchanger 1300 through the third flow path R3, and receives the refrigerant discharged from the outdoor heat exchanger 1300 to exchange heat with the battery cooling water, and with the battery cooling water The heat-exchanged refrigerant is supplied to the compressor 1100 through the fourth flow path R4.

The evaporator 1500 is provided on a fifth passage R5 branching from the third passage R3, and the fifth passage R5 is branched from the third passage R3 and the integrated chiller 1400 ) and the fourth flow path R4 connecting the compressor 1100.

The evaporator 1500 cools the vehicle interior by introducing refrigerant discharged from the outdoor heat exchanger 1300 in the cooling mode and the battery cooling cooling mode, vaporizing the refrigerant, and exchanging heat with air supplied to the vehicle interior.

An expansion valve unit 1600 is provided on the front end of the integrated chiller 1400 on the second flow passage R2 and the third passage R3, and on the front end of the evaporator 1500 on the fifth passage R5. and the expansion valve unit 1600 selectively opens and closes the second flow path R2, the third flow path R3, and the fifth flow path R5, and the second flow path R2, the third flow path ( R3) and serves to selectively expand the refrigerant moving to the fifth flow path R5 in response to each mode.

The expansion valve unit 1600 includes a first electromagnetic expansion valve 1610 , a second electromagnetic expansion valve 1620 , and a solenoid expansion valve 1630 . The first electronic expansion valve 1610 is provided on the second flow path R2 connecting the indoor condenser 1200 and the outdoor heat exchanger 1300, and the indoor condenser 1200 in the heating mode and the heating and dehumidifying mode. ), the refrigerant that has passed through is expanded and decompressed, and then supplied to the outdoor heat exchanger (1300).

The second electronic expansion valve 1620 is provided at the front end of the integrated chiller 1400 on the third flow path R3, and in the battery cooling/cooling mode, after passing through the outdoor heat exchanger 1300, the third The refrigerant supplied to the integrated chiller 1400 through the flow path R3 is expanded to reduce pressure, and in the heating mode and the heating and dehumidifying mode, it passes through the indoor condenser 1200 and branches off from the second flow path R2. The refrigerant supplied to the integrated chiller 1400 through the seventh flow path R7 is expanded and decompressed, and then supplied to the compressor 1100 .

The solenoid expansion valve 1630 is provided at the front end of the evaporator 1500 on the fifth flow path R5, and expands the refrigerant supplied to the evaporator 1500 in a cooling mode, a battery cooling cooling mode, and a heating and dehumidifying mode. After reducing the pressure, it is supplied to the compressor 1100 . The refrigerant discharged from the outdoor heat exchanger 1300 is supplied to the evaporator 1500 in the cooling mode and the battery cooling cooling mode, and the refrigerant discharged from the indoor condenser 1200 is supplied in the heating and dehumidifying mode.

On a sixth flow path R6 that is branched from the third flow path R3 and connected to the fourth flow path R4, branched from the second flow path R2 and then connected to the third flow path R3 An opening/closing valve unit 1700 is provided on the seventh flow path R7, and the opening/closing valve unit 1700 serves to selectively open and close the sixth flow path R6 and the seventh flow path R7.

The on-off valve unit 1700 includes a first on-off valve 1710 and a second on-off valve 1720 . The first on/off valve 1710 is provided on the sixth flow path R6 connected to the fourth flow path R4 after branching from the third flow path R3 adjacent to the outdoor heat exchanger 1300 to The 6 flow path R6 is selectively opened and closed to supply or not supply the refrigerant discharged from the outdoor heat exchanger 1300 to the compressor 1100 .

The second opening/closing valve 1720 is provided on a seventh passage R7 connected to the third passage R3 after branching from the second passage R2 to selectively open the seventh passage R7. By opening and closing, the refrigerant discharged from the indoor condenser 1200 is supplied or not supplied to the integrated chiller 1400 and the evaporator 1500, and the first on-off valve 1710 and the second on-off valve 1720 It is preferable that a two-way valve is used as the furnace.

The operations of the expansion valve unit 1600 and the on/off valve unit 1700 are controlled by a control unit 1800, and the control unit 1800 controls the expansion valve unit 1600 and the opening/closing valve in response to each mode. The operation of the unit 1700 is controlled.

The control unit 1800 also controls the operation of the check valve 1900 , and the check valve 1900 is provided at the front end of the branching point of the fifth flow passage R5 on the third flow passage R3 . In the check valve 11900, the refrigerant supplied to the integrated chiller 1400 through the seventh flow path R7 in the heating mode and the heating and dehumidifying mode passes through the third flow path R3 to the outdoor heat exchanger 1300. It serves to prevent movement to the side.

3, in the cooling mode, the refrigerant flow circulates through the compressor 1100, the indoor condenser 1200, the outdoor heat exchanger 1300, the evaporator 1500, and the compressor 1100 to cool the vehicle interior. do.

In the cooling mode, the first electromagnetic expansion valve 1610, which is an expansion valve for heating provided on the second flow path R2, is opened to supply the refrigerant discharged from the indoor condenser 1200 to the outdoor heat exchanger 1300. A second electromagnetic expansion valve 1620 which is an integrated expansion valve provided at the front end of the integrated chiller 1400 on the third flow passage R3 and an on/off valve unit 1700 provided on the seventh flow passage R7 The second opening/closing valve 1720 is closed to prevent the refrigerant moving to the third passage R3 and the refrigerant moving to the seventh passage R7 from being supplied to the integrated chiller 1400, and the third passage ( The refrigerant moving to R3) is moved to the fifth flow path R5 branched from the third flow path R3. The first on-off valve 1710 of the on-off valve unit 1700 provided on the sixth flow path R6 is also closed so that the refrigerant discharged from the outdoor heat exchanger 1300 is not supplied to the compressor 1100 .

The solenoid expansion valve 1630, which is an expansion valve for cooling, provided at the front end of the evaporator 1500 on the fifth flow path R5 expands the refrigerant moving to the evaporator 1500 through the fifth flow path R5. Then, it is supplied to the evaporator 1500, and the refrigerant that has passed through the evaporator 1500 is circulated to the compressor 1100 through the fifth flow path R5, and the fifth flow path R3 on the third flow path R3. It is preferable that the check valve 1900 provided in front of the branching point of the flow path R5 is opened.

Referring to FIG. 4 , in the battery cooling/cooling mode, the flow of refrigerant passes through the compressor 1100 , the indoor condenser 1200 , and the outdoor heat exchanger 1300 , and some refrigerant passes through the evaporator 1500 and then the compressor 1100 . is circulated to, and another part of the refrigerant that has passed through the outdoor heat exchanger 1300 passes through the integrated chiller 1400 and then circulates through the compressor 1100 to perform battery cooling and cooling.

In the battery cooling/cooling mode, the first electromagnetic expansion valve 1610, which is an expansion valve for heating provided on the second flow path R2, is opened to supply the refrigerant discharged from the indoor condenser 1200 to the outdoor heat exchanger 1300. do. The first on/off valve 1710 of the on/off valve unit 1700 provided on the sixth flow path R6 and the second on/off valve of the on/off valve unit 1700 provided on the seventh flow path R7 1720 is closed in the sixth flow path R6 and the second flow path R2 in which the refrigerant moving to the third flow path R3 and the second flow path R2 is branched from the third flow path R3. It is prevented from being supplied to the compressor 1100 and the integrated chiller 1400 through the branched seventh flow path R7.

The second electromagnetic expansion valve 1620 which is an integrated expansion valve provided on the third flow path R3 and the solenoid expansion valve 1630 which is a cooling expansion valve provided on the fifth flow path R5 are each After expanding the refrigerant supplied to the integrated chiller 1400 through the third flow path R3 and the refrigerant supplied to the evaporator 1500 through the fifth flow path R5, the integrated chiller 1400 and the evaporator ( 1500), and the refrigerant that has passed through the integrated chiller 1400 and the evaporator 1500 is circulated to the compressor 1100 through a fourth passage R4 and a fifth passage R5. It is preferable that the check valve 1900 provided at the front end of the branching point of the fifth passage R5 on the third passage R3 is opened.

Referring to FIG. 5 , in the heating mode, the refrigerant flows through the compressor 1100 and the indoor condenser 1200 , and then some refrigerant circulates through the outdoor heat exchanger 1400 and the compressor 1100 , and the indoor condenser 1200 . ), a portion of the refrigerant is circulated to the integrated chiller 1400 and the compressor 1100 to heat the vehicle interior.

In the heating mode, the first opening/closing valve 1710 of the on-off valve unit 1700 provided on the sixth flow path R6 and the opening/closing valve unit 1700 provided on the seventh flow path R7 are first The two on/off valves 1720 are opened to supply the refrigerant that has passed through the outdoor heat exchanger 1300 and the indoor condenser 1200 to the compressor 1100 and the integrated chiller 1400, respectively.

The solenoid expansion valve 1630, which is an expansion valve for cooling, provided on the fifth flow path R5 is closed to prevent the refrigerant that has passed through the outdoor heat exchanger 1300 from being supplied to the evaporator 1500, and the third flow path The check valve 1900 provided on the top is closed so that the refrigerant supplied to the integrated chiller 1400 through the seventh passage R7 is not moved toward the outdoor heat exchanger 1300 through the third passage R3. make sure not to

The first electromagnetic expansion valve 1610 of the expansion valve unit 1600, which is an expansion valve for heating provided on the second flow path R2, and the expansion valve which is an integrated expansion valve provided on the third flow path R3 The second electromagnetic expansion valve 1620 of the unit 1600 expands the refrigerant discharged from the indoor condenser 1200, respectively, and supplies it to the outdoor heat exchanger 1300 and the integrated chiller 1400, and the outdoor heat exchange The refrigerant that has passed through the unit 1300 and the integrated chiller 1400 is circulated to the compressor 1100 . In the heating mode, when an implantation occurs in the outdoor heat exchanger 1300, the first electromagnetic expansion valve 1610 of the expansion valve unit 1600, which is an expansion valve for heating, is closed to block the flow of refrigerant, and only in the integrated chiller 1400. While the refrigerant is expanded, the outdoor heat exchanger 1300 is defrosted.

Referring to FIG. 6, in the heating and dehumidifying mode, the refrigerant flows through the compressor 1100 and the indoor condenser 1200, and then some refrigerant circulates through the outdoor heat exchanger 1300 and the compressor 1100, and the indoor condenser ( A portion of the refrigerant that has passed through 1200 is circulated to the compressor 1100 after passing through the integrated chiller 1400 and the evaporator 1500 to heat and dehumidify the interior of the vehicle.

In the heating and dehumidification mode, the first on-off valve 1710 of the on-off valve unit 1700 provided on the sixth flow path R6 and the on-off valve unit 1700 provided on the seventh flow path R7 The second on/off valve 1720 is opened to supply the refrigerant that has passed through the outdoor heat exchanger 1300 and the indoor condenser 1200 to the compressor 1100 and the integrated chiller 1400, respectively.

The first electromagnetic expansion valve 1610 of the expansion valve unit 1600, which is an expansion valve for heating provided on the second flow path R2, and the expansion valve which is an integrated expansion valve provided on the third flow path R3 The second electromagnetic expansion valve 1620 of the unit 1600 and the solenoid expansion valve 1630 of the expansion valve unit 1600, which is an expansion valve for cooling provided on the fifth flow path R5, are respectively installed in the outdoor heat exchanger. The refrigerant supplied to 1300 and the refrigerant supplied to the integrated chiller 1400 and the refrigerant supplied to the evaporator 1500 are expanded, and the outdoor heat exchanger 1300, the integrated chiller 1400, the evaporator ( The refrigerant passing through 1500 is circulated to the compressor 1100 . The check valve 1900 provided on the third flow path is closed so that the refrigerant supplied to the integrated chiller 1400 and the evaporator 1500 through the seventh flow path R7 flows through the third flow path R3. Do not move toward the outdoor heat exchanger (1300). When an idea occurs in the outdoor heat exchanger 1300 in heating and dehumidification mode, the integrated chiller 1400 closes the first electromagnetic expansion valve 1610 of the expansion valve unit 1600, which is an expansion valve for heating, to block the flow of refrigerant. Defrosting of the outdoor heat exchanger 1300 is performed while expanding the refrigerant only in the

Referring to FIG. 7 , the heat pump system 100 for a vehicle according to another embodiment of the present invention further includes a dehumidification passage DR and a dehumidification passage opening/closing valve 2000, and the dehumidification passage DR is It is branched from the second flow path R2 and is connected to the solenoid expansion valve 1630 of the expansion valve unit 1600 provided on the fifth flow path R5.

A dehumidification passage opening/closing valve 2000 is provided on the dehumidification passage DR, and the dehumidification passage opening/closing valve 2000 selectively opens and closes the dehumidification passage DR while the operation is controlled by the control unit 1800 . do

Preferably, the dehumidification flow path DR connected to the solenoid expansion valve 1630 of the expansion valve unit 1600 is connected to an orifice hole (not shown) of the solenoid expansion valve 1630, and the dehumidification flow path DR The refrigerant supplied to the solenoid expansion valve 1630 through the cycled When the second passage R2 and the fifth passage R5 are connected by the dehumidification passage DR, the check valve 1900 branches off the fifth passage R5 on the third passage R3. It is preferable to be located at the rear end.

Referring to FIG. 8 , the refrigerant flow in the heating mode of the vehicle heat pump system 100 including the dehumidification passage DR and the dehumidification passage opening/closing valve 2000 is the compressor 1100 and the indoor condenser 1200. After passing through, some of the refrigerant circulates to the outdoor heat exchanger 1300 and the compressor 1100, and the other refrigerant that has passed through the indoor condenser 1200 is circulated to the integrated chiller 1400 and the compressor 1100 while circulating in the interior of the vehicle. heating will be performed.

In the heating mode, the first opening/closing valve 1710 of the on-off valve unit 1700 provided on the sixth flow path R6 and the opening/closing valve unit 1700 provided on the seventh flow path R7 are first The two on/off valves 1720 are opened to supply the refrigerant that has passed through the outdoor heat exchanger 1300 and the indoor condenser 1200 to the compressor 1100 and the integrated chiller 1400, respectively.

The solenoid expansion valve 1630, which is an expansion valve for cooling, provided on the fifth flow path R5 is closed to prevent the refrigerant that has passed through the outdoor heat exchanger 1300 from being supplied to the evaporator 1500, and the third flow path On (R3), the check valve 1900 provided at the rear end of which the fifth flow path R5 branches is closed so that the refrigerant supplied to the integrated chiller 1400 through the seventh flow path R7 flows into the fifth flow path ( R5) while not moving toward the outdoor heat exchanger 1300 through the third flow path R3.

The first electromagnetic expansion valve 1610 of the expansion valve unit 1600, which is an expansion valve for heating provided on the second flow path R2, and the expansion valve which is an integrated expansion valve provided on the third flow path R3 The second electromagnetic expansion valve 1620 of the unit 1600 expands the refrigerant discharged from the indoor condenser 1200, respectively, and supplies it to the outdoor heat exchanger 1300 and the integrated chiller 1400, and the outdoor heat exchange The refrigerant that has passed through the unit 1300 and the integrated chiller 1400 is circulated to the compressor 1100 .

A dehumidification passage provided on the dehumidification passage DR connected to an orifice hole (not shown) of a solenoid expansion valve 1630 provided on the fifth passage R5 after branching from the second passage R2 The opening/closing valve 2000 is closed to prevent the refrigerant moving to the second flow path R2 from moving to the dehumidifying flow path DR.

Referring to FIG. 9 , the refrigerant flow in the heating and dehumidifying mode of the vehicle heat pump system 100 including the dehumidification passage DR and the dehumidification passage opening/closing valve 2000 is the compressor 1100 and the indoor condenser 1200 . After passing through, some of the refrigerant circulates through the outdoor heat exchanger 1300 and the compressor 1100, and some of the other refrigerants that have passed through the indoor condenser 1200 go through the dehumidification passage DR through the evaporator 1500 and the compressor. (1100) is mild, and the other part is circulated to the integrated chiller 1400 and the compressor 1100 through the seventh flow passage R7 to heat and dehumidify the interior of the vehicle.

In the heating and dehumidification mode, the first on-off valve 1710 of the on-off valve unit 1700 provided on the sixth flow path R6 and the on-off valve unit 1700 provided on the seventh flow path R7 The second on/off valve 1720 is opened to supply the refrigerant that has passed through the outdoor heat exchanger 1300 and the indoor condenser 1200 to the compressor 1100 and the integrated chiller 1400, respectively, and is on the dehumidification passage DR. The provided dehumidification passage opening/closing valve 2000 is also opened to supply the refrigerant that has passed through the indoor condenser 1200 to the evaporator 1500 .

The first electromagnetic expansion valve 1610 of the expansion valve unit 1600, which is an expansion valve for heating provided on the second flow path R2, and the expansion valve which is an integrated expansion valve provided on the third flow path R3 The second electromagnetic expansion valve 1620 of the unit 1600 expands the refrigerant supplied to the outdoor heat exchanger 1300 and the refrigerant supplied to the integrated chiller 1400, respectively, and passes through the dehumidification passage DR. The refrigerant supplied to the evaporator 1500 is expanded while passing through an orifice hole (not shown) of the solenoid expansion valve 1630 and then supplied to the evaporator 1500, the outdoor heat exchanger 1300, the integrated chiller ( 1400 ), the refrigerant that has passed through the evaporator 1500 is circulated to the compressor 1100 . The check valve 1900 provided at the rear end where the fifth passage R5 branches on the third passage R3 is closed, so that the refrigerant supplied to the integrated chiller 1400 through the seventh passage R7 is discharged from the third passage R3. Preferably, it is not moved toward the outdoor heat exchanger 1300 through the third passage R3 while not moving toward the fifth passage R5.

Therefore, it is possible to realize the battery cooling and heating mode without adding a separate battery chiller and expansion valve, and it is possible to simultaneously absorb heat from the outside air heat source and the cooling water waste heat source, and to selectively absorb heat according to the heat source condition, thereby heating performance. can improve

Although the present invention has been described with reference to the embodiment shown in the drawings, which is only exemplary, those of ordinary skill 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 determined by the technical spirit of the appended claims.

100: vehicle heat pump system 1100: compressor
1200: indoor condenser 1300: outdoor heat exchanger
1400: integrated chiller 1500: evaporator
1600: expansion valve unit 1610: first electromagnetic expansion valve
1620: second electromagnetic expansion valve 1630: solenoid expansion valve
1700: on-off valve 1710: first on-off valve
1720: second on-off valve 1800: control unit
1900: check valve 2000: dehumidification flow opening/closing valve

Claims (13)

a compressor for compressing the introduced refrigerant and discharging it in a gaseous state;
an indoor condenser connected to the compressor by a first flow path, into which a high-temperature and high-pressure refrigerant discharged from the compressor flows in, and heats the room in a heating mode by exchanging the refrigerant with air flowing in the air conditioning case;
an outdoor heat exchanger connected to the indoor condenser by a second flow path and heat-exchanging the refrigerant discharged from the indoor condenser with air introduced from the outside;
an integrated chiller connected to the outdoor heat exchanger by a third passage, introducing a refrigerant discharged from the outdoor heat exchanger, exchanging heat with cooling water in a battery cooling cooling mode, and supplying the heat-exchanged refrigerant to the compressor through a fourth passage;
It is provided on the fifth flow path connected to the fourth flow path after branching from the third flow path, and in the cooling mode or battery cooling cooling mode, the refrigerant discharged from the outdoor heat exchanger is introduced to vaporize the refrigerant and supplied to the vehicle interior an evaporator that cools the room by heat exchange with the air;
It is provided at the front end of the integrated chiller on the second flow passage and the third flow passage, and at the front end of the evaporator on the fifth passage to selectively open and close the second passage, the third passage, and the fifth passage. an expansion valve unit for selectively expanding the refrigerant moving to the second flow passage, the third flow passage, and the fifth flow passage;
It is provided on a sixth passage connected to the fourth passage after branching from the third passage adjacent to the outdoor heat exchanger, and on a seventh passage connected to the third passage after branching from the second passage, the sixth passage an opening/closing valve part selectively opening and closing the flow path and the seventh flow path; and
A vehicle heat pump system comprising a control unit for controlling operations of the expansion valve unit and the on/off valve unit in response to each mode.
The method according to claim 1,
Refrigerant provided at the front end of the branching point of the fifth flow path on the third flow path and supplied to the integrated chiller through the seventh flow path in heating mode and heating and dehumidifying mode moves to the outdoor heat exchanger through the third flow path A vehicle heat pump system further comprising a check valve to prevent it from being.
3. The method according to claim 2,
The expansion valve unit,
a first electronic expansion valve provided on the second flow path to expand and reduce the pressure of the refrigerant that has passed through the indoor condenser in a heating mode and a heating and dehumidifying mode;
a second electronic expansion valve provided at the front end of the integrated chiller on the third flow path to expand and reduce the pressure of the refrigerant supplied to the integrated chiller in a battery cooling/cooling mode, heating mode, and heating/dehumidifying mode;
and a solenoid expansion valve provided at the front end of the evaporator on the fifth flow path to expand and reduce the pressure of the refrigerant supplied to the evaporator in a cooling mode, a battery cooling cooling mode, and a heating and dehumidifying mode.
3. The method according to claim 2,
The on-off valve unit,
a first opening/closing valve provided on a sixth flow passage connected to the fourth passage after branching from the third passage adjacent to the outdoor heat exchanger to selectively open and close the sixth passage;
and a second opening/closing valve provided on a seventh passage connected to the third passage after branching from the second passage to selectively open and close the seventh passage.
5. The method according to claim 4,
The heat pump system for a vehicle, characterized in that a 2-way valve is used as the first on-off valve and the second on-off valve.
3. The method according to claim 2,
In cooling mode,
The first electromagnetic expansion valve of the expansion valve part provided on the second flow path is opened,
A second electromagnetic expansion valve of the expansion valve unit provided on the third flow path, a first on/off valve of the on/off valve unit provided on the sixth flow path, and a second opening/closing of the opening/closing valve unit provided on the seventh flow path the valve closes,
The solenoid expansion valve of the expansion valve part provided on the fifth flow path expands the refrigerant supplied to the evaporator, and the check valve is opened.
3. The method according to claim 2,
In battery cooling cooling mode,
The first electromagnetic expansion valve of the expansion valve part provided on the second flow path is opened,
The first on-off valve of the on-off valve part provided on the sixth flow passage and the second on-off valve of the on-off valve part on the seventh passage are closed;
The second electromagnetic expansion valve of the expansion valve unit provided on the third flow path and the solenoid expansion valve of the expansion valve unit provided on the fifth flow path expand the refrigerant supplied to the integrated chiller and the evaporator, and check the check A vehicle heat pump system, characterized in that the valve is opened.
3. The method according to claim 2,
In heating mode,
The first on-off valve of the on-off valve part provided on the sixth flow passage and the second on-off valve of the on-off valve part on the seventh passage are opened;
The solenoid expansion valve of the opening/closing valve part provided on the fifth flow path is closed,
The first electromagnetic expansion valve of the expansion valve part provided on the second flow passage and the second electromagnetic expansion valve of the expansion valve part provided on the third flow passage are respectively supplied to the refrigerant supplied to the outdoor heat exchanger and the integrated chiller. A heat pump system for a vehicle, characterized in that the refrigerant is expanded, and the check valve is closed.
3. The method according to claim 2,
In heating and dehumidifying mode,
The first on-off valve of the on-off valve part provided on the sixth flow passage and the second on-off valve of the on-off valve part on the seventh passage are opened;
Solenoid expansion of the first electromagnetic expansion valve of the expansion valve unit provided on the second flow path, the second electromagnetic expansion valve of the expansion valve unit provided on the third flow path, and the opening/closing valve unit provided on the fifth flow path The valve expands the refrigerant supplied to the outdoor heat exchanger, the refrigerant supplied to the integrated chiller, and the refrigerant supplied to the evaporator, respectively, and the check valve is closed.
10. The method according to claim 8 and 9,
In the heating mode and heating and dehumidification mode, when an idea occurs in the outdoor heat exchanger, the first electromagnetic expansion valve of the expansion valve, which is a heating expansion valve, is closed to block the flow of refrigerant supplied to the outdoor heat exchanger, thereby supplying refrigerant only from the integrated chiller. A heat pump system for a vehicle, characterized in that defrosting the outdoor heat exchanger while expanding.
3. The method according to claim 2,
a dehumidification flow passage branched from the second flow passage and connected to the solenoid expansion valve of the expansion valve unit provided on the fifth flow passage;
Further comprising a dehumidification passage opening/closing valve provided on the dehumidification passage to selectively open and close the dehumidification passage,
The dehumidification flow path is connected to the orifice hole of the solenoid expansion valve,
When the second flow path and the fifth flow path are connected by the dehumidification flow path, the check valve is located at a rear end of the third flow path at which the fifth flow path is branched.
12. The method of claim 11,
In heating mode,
The first on-off valve of the on-off valve part provided on the sixth flow passage and the second on-off valve of the on-off valve part on the seventh passage are opened;
The solenoid expansion valve of the opening/closing valve unit provided on the fifth flow path and the dehumidification path opening/closing valve provided on the dehumidification path are closed;
The first electromagnetic expansion valve of the expansion valve part provided on the second flow passage and the second electromagnetic expansion valve of the expansion valve part provided on the third flow passage are respectively supplied to the refrigerant supplied to the outdoor heat exchanger and the integrated chiller. A heat pump system for a vehicle, characterized in that the refrigerant is expanded, and the check valve is closed.
12. The method of claim 11,
In heating and dehumidifying mode,
The first on-off valve of the on-off valve part provided on the sixth flow passage, the second on-off valve of the on-off valve part on the seventh passage, and the dehumidification passage opening/closing valve provided on the dehumidification passage are opened;
The first electromagnetic expansion valve of the expansion valve part provided on the second flow passage and the second electromagnetic expansion valve of the expansion valve part provided on the third flow passage are respectively supplied to the refrigerant supplied to the outdoor heat exchanger and the integrated chiller. expand the refrigerant,
The refrigerant moving to the dehumidification passage is expanded while passing through the orifice hole of the expansion valve unit, and then supplied to the evaporator, and the check valve is closed.

Images