KR20220049059A - Automotive air conditioning system - Google Patents

Abstract

The present invention provides a cooling and heating system for a vehicle, which comprises a compressor, an indoor condenser, a water cooling type condenser, an outdoor condenser, an evaporator, an accumulator, a battery chiller, a first cooling water line, a second cooling water line an expansion valve unit, a sensor unit, an opening and closing valve unit, and a control unit.

Description

Automotive air conditioning system

The present invention relates to a cooling and heating system for a vehicle, and more particularly, to a cooling and heating system for a vehicle that performs cooling and heating of a vehicle by using a refrigerant heat-exchanged with cooling water in a water-cooled condenser.

Referring to the background art described in Korean Patent Registration No. 10-1342931, an air conditioner for a vehicle 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 heat with the refrigerant passing through outdoors, a low-pressure side heat exchanger (60) for evaporating the refrigerant passing 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 a second expansion valve (56) installed in parallel with 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 includes 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.

In the conventional vehicle heat pump system, dehumidification performance is not established because sufficient condensing is not performed in the indoor condenser under a specific outdoor temperature or higher, so refrigerant expansion in the orifice hole does not occur. There is a limit to the outdoor temperature conditions that can be heated and dehumidified using the pump system.

The present invention was created to solve the above problems, and it is possible to secure fast-acting dehumidification performance by configuring an optimal refrigerant line for each outdoor temperature, and to secure optimal dehumidification conditions by two-stage expansion of the minimum flow rate It is possible to maintain a stable temperature of the dehumidification line with An object of the present invention is to provide a cooling and heating system for a vehicle that can improve the refrigerant passage and noise generated when the circuit is opened by the differential pressure by expanding to a low pressure across the system.

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 of high temperature and high pressure; 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; a water-cooled condenser connected to the indoor condenser by a second flow path and condensing the refrigerant through heat exchange with cooling water by introducing a refrigerant discharged from the indoor condenser; an outdoor condenser connected to the water-cooled condenser by a third flow path and condensing the refrigerant through heat exchange with external air by introducing the refrigerant discharged from the water-cooled condenser; an evaporator connected to the outdoor condenser by a fourth flow path and cooling the interior of the vehicle by heat exchange with air supplied to the interior of the vehicle through the air conditioning case while introducing the refrigerant discharged from the outdoor condenser to vaporize the refrigerant; The evaporator is connected to the evaporator by a fifth passage, and the compressor is connected by a sixth passage. In the cooling mode and high temperature heating/dehumidifying mode, the refrigerant is supplied from the evaporator, and in the heating mode, the water-cooled condenser through a branch passage In the case of supplied refrigerant, low-temperature heating and dehumidifying mode, and mild heating and dehumidifying mode, the refrigerant supplied from the water-cooled capacitor and the evaporator is temporarily stored, the stored refrigerant is separated into a liquid refrigerant and a gaseous refrigerant, and the separated gaseous refrigerant is used in the compressor accumulator supplied with; a battery chiller provided on a bypass passage branched from the fourth passage and connected to the fifth passage and condensing the refrigerant through heat exchange with cooling water in a cooling mode and a cooling battery cooperative mode; a first coolant line for circulating coolant by connecting a first radiator of a radiator part disposed adjacent to the outdoor capacitor and the water-cooled capacitor; a second coolant line including a 2-1 coolant line and a 2-2 coolant line connecting the second radiator of the radiator unit, the water-cooled capacitor, and the battery chiller to circulate coolant; an expansion valve unit provided on the second passage, the fourth passage, and the bypass passage to depressurize the refrigerant moving to the second passage, the fourth passage, and the bypass passage; a sensor unit provided on the first flow path adjacent to the indoor condenser and the sixth flow path adjacent to the compressor and adjacent to the outdoor condenser for measuring the pressure and temperature of the first flow path and the sixth flow path and the temperature of outside air; an opening/closing valve unit provided on a dehumidification passage branched from the second passage and connected to the fourth passage, at a point where the branching passage is branched from the third passage to be connected to the fifth passage; and a control unit connected to the control unit and controlling the opening and closing of the opening/closing valve unit based on the opening/closing direction of the opening/closing valve unit and the superheat of the refrigerant supplied to the compressor and the temperature of the outside air in response to each mode. to provide.

In the heating and cooling system for a vehicle according to the present invention, the length of the dehumidification passage may be 500 mm or less, and a 2-way valve and a 3-way valve may be used for the opening/closing valve unit.

The first coolant line includes a first reservoir tank in which coolant circulated to the first coolant line is stored, and a first direction change that is provided on the first coolant line and converts the flow of coolant circulated to the first coolant line a valve, a first coolant bypass line connecting the first reservoir tank and the first direction switching valve, and a first pump for circulating the coolant stored in the first reservoir tank to the first coolant line there is.

The second coolant line is a 2-1 coolant line connecting the second radiator of the radiator unit and the water-cooled capacitor, and a second-second cooling water line connected to the 2-1 coolant line and connecting the battery chiller to the battery of the vehicle. A second cooling water line may be included, and a second direction switching valve may be provided at a point where the second-first coolant line and the second-second coolant line are connected.

A 2-1 pump for circulating the coolant stored in the second reservoir tank to the 2-1 coolant line may be provided on the 2-1 coolant line, and the coolant is supplied to the second coolant line on the 2-2 coolant line A 2-2 pump circulating to the 2-2 coolant line may be provided, and on the 2-2 coolant line, coolant is provided between the battery of the vehicle and the battery chiller and flows to the 2-2 coolant line A coolant heater may be provided to heat the .

The expansion valve part is provided at the front end of the water-cooled condenser on the second flow path and expands the refrigerant supplied from the indoor condenser to the water-cooled condenser in heating mode, high temperature and low temperature and mild heating and dehumidification mode to reduce pressure. and a solenoid provided at the front end of the evaporator on the fourth flow path and expands the refrigerant supplied to the evaporator through the fourth flow path in a cooling mode, a cooling battery cooperative mode, a high temperature heating and dehumidifying mode, and a mild heating and dehumidifying mode to reduce pressure. It may include an expansion valve and a second electronic expansion valve provided at the front end of the battery chiller on the bypass flow path to expand and reduce pressure by expanding the refrigerant supplied to the battery chiller through the bypass flow path in a cooling battery cooperative mode. , the solenoid expansion valve may have an orifice hole to which one end of the dehumidification passage branching from the second passage is connected, and the refrigerant supplied to the fourth passage through the dehumidifying passage in high temperature and low temperature and mild heating and dehumidification modes. can be reduced pressure by being throttled through the orifice hole.

The opening/closing valve unit includes a first on/off valve provided on the dehumidification passage branched from the second passage and connected to the fourth passage to open and close the dehumidification passage, and at a point where the branch passage is branched from the third passage. It may include a second on-off valve provided to control the flow direction of the refrigerant moving to the third flow path, the first on-off valve may be a 2-way valve, and the second on-off valve may be fully open and step A controllable three-way valve may be used.

The second on-off valve provided at the branching point of the branch flow path in the third flow path can be opened simultaneously in the direction of the outdoor capacitor and the branch flow path, and partially so that the refrigerant flows at the same time according to the differential pressure of each refrigerant circuit. A 3-way valve with open control can be used.

The sensor unit is provided on the first flow path adjacent to the indoor condenser and the sixth flow path adjacent to the compressor, and a PT sensor for measuring the pressure and temperature of the first flow path and the sixth flow path; It may include an outdoor temperature sensor, and the sensor unit may be connected to the control unit.

The control unit may control the expansion valve unit and the on/off valve unit according to the outside air temperature measured by the outside air temperature sensor to switch to a high temperature heating and dehumidifying mode, a low temperature heating and dehumidifying mode, and a mild heating and dehumidifying mode, and the outside temperature sensor is The high-temperature heating and dehumidification mode can be operated when the measured outdoor temperature is 17°C or higher, the low-temperature heating/dehumidifying mode when the outdoor temperature is 3°C or lower, and the mild heating and dehumidifying mode when the outdoor temperature is 3°C or higher and 17°C or lower. .

In the cooling mode, the first on-off valve of the on-off valve provided on the dehumidification passage may be closed, and the second on-off valve of the on-off valve provided at a point where the branch passage is branched from the third passage is the outdoor capacitor. direction, 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 bypass flow path may be closed, and The solenoid expansion valve of the expansion valve unit provided on the fourth flow path may expand the refrigerant supplied to the evaporator through the fourth flow path, and the cooling water may include the first coolant line, the 2-1 coolant line, and the second -2 may be circulated to the coolant line, and the first bypass coolant line of the first coolant line may be sealed.

In the heating mode, the first on-off valve of the on-off valve provided on the dehumidification passage may be closed, and the second on-off valve of the on-off valve provided at a point where the branch passage is branched from the third passage is the branch passage. direction, the solenoid expansion valve of the expansion valve unit provided on the fourth flow path and the second electromagnetic expansion valve of the expansion valve unit provided on the bypass flow path can be closed, and provided on the second flow path The first electromagnetic expansion valve of the expansion valve unit may expand the refrigerant supplied to the water-cooled condenser through the second flow path, and the cooling water may circulate to a first coolant line, and a first bypass of the first coolant line. The pass coolant line may be opened so that coolant may not circulate to the first radiator of the radiator unit.

In the high-temperature heating and dehumidification mode, the first on-off valve of the on-off valve provided on the dehumidification passage may be opened, and the second on-off valve of the on-off valve portion provided at a point where the branch passage is branched from the third passage is the may be opened toward the outdoor capacitor, the second electromagnetic expansion valve of the expansion valve unit provided on the bypass flow path may be closed, and the solenoid expansion valve of the expansion valve unit provided on the fourth flow path may be opened, and The first electromagnetic expansion valve of the expansion valve unit provided on the second flow path may expand the refrigerant supplied to the water-cooled condenser through the second flow path, and the refrigerant supplied to the fourth flow path through the dehumidification flow path is the may be throttled while passing through the orifice hole of the second electronic expansion valve, coolant may circulate to the first coolant line and the second coolant line, and the first bypass coolant line of the first coolant line may be When it is opened, the coolant may not circulate to the first radiator of the radiator unit.

In the low-temperature heating and dehumidification mode, the first on-off valve of the on-off valve provided on the dehumidification passage may be opened, and the second on-off valve of the on-off valve portion provided at a point where the branch passage is branched from the third passage is the The second electromagnetic expansion valve of the expansion valve unit provided on the bypass flow path and the solenoid expansion valve of the expansion valve unit provided on the fourth flow path may be closed in the direction of the branch flow path, and may be closed on the second flow path. The first electromagnetic expansion valve of the expansion valve part provided in the expansion valve may expand the refrigerant supplied to the water-cooled condenser through the second flow path, and the refrigerant supplied to the fourth flow path through the dehumidification flow path is the second electronic expansion may be throttled while passing through the orifice hole of the valve, coolant may circulate to the first coolant line and the second coolant line, and the first bypass coolant line of the first coolant line is opened to the radiator The coolant may not circulate to the negative first radiator.

In the mild heating and dehumidification mode, the first on-off valve of the on-off valve provided on the dehumidification passage may be opened, and the second on-off valve of the on-off valve provided at a point where the branch passage is branched from the third passage is the The second electromagnetic expansion valve of the expansion valve unit provided on the bypass flow path may be closed, and the solenoid expansion valve of the expansion valve unit provided on the fourth flow path may be opened in the direction of the outdoor capacitor and the branch flow path. may be opened, and the first electromagnetic expansion valve of the expansion valve unit provided on the second flow path may expand the refrigerant supplied to the water-cooled condenser through the second flow path, and to the fourth flow path through the dehumidification flow path The supplied refrigerant may be throttled while passing through the orifice hole of the second electromagnetic expansion valve, and the coolant may circulate through the first coolant line and the second coolant line, and the first coolant line in the first coolant line The bypass coolant line may be opened so that coolant may not circulate to the first radiator of the radiator unit.

In the cooling battery cooperative mode, the first on-off valve of the on-off valve provided on the dehumidification passage may be closed, and the second on-off valve of the on-off valve provided at a point where the branch passage is branched from the third passage is the may be opened toward the outdoor capacitor, the first electromagnetic expansion valve of the expansion valve unit provided on the second flow path may be opened, and the solenoid expansion valve of the expansion valve unit provided on the fourth flow path and the bypass flow path The second electronic expansion valve of the expansion valve unit provided in the expansion valve may expand the refrigerant supplied to the evaporator through the fourth flow path and the refrigerant supplied to the battery chiller through the bypass flow path, and the cooling water is the first cooling water Line and the 2-1 coolant line and the 2-2 coolant line may circulate, and the first bypass coolant line of the first coolant line may be sealed.

The cooling and heating system for a vehicle according to the present invention can secure fast-acting dehumidification performance by configuring an optimal refrigerant line for each outdoor temperature, minimize power consumption with an efficient PTC use logic, and minimize flow rate for two-stage expansion. It is possible to maintain a stable temperature of the dehumidification line by securing optimal dehumidification conditions.

In addition, the dehumidification flow path is branched from the second flow path adjacent to the indoor condenser and connected to the second electronic expansion valve, thereby shortening the length of the dehumidification flow path and generating the minimum differential pressure, while the maximum refrigerant flow can be supplied to the evaporator through the dehumidification flow path. In addition, it is possible to maintain a constant dehumidification performance by throttling the refrigerant by the orifice hole formed in the solenoid expansion valve installed in the dehumidification flow path, and to improve the refrigerant passage noise generated when the circuit is opened by the differential pressure.

1 is a block diagram showing a conventional vehicle heat pump system.
2 is a configuration diagram illustrating a heating/cooling system for a vehicle according to an embodiment of the present invention.
3 is a diagram illustrating a state in which a refrigerant and coolant are circulated in a cooling mode of the cooling/heating system for a vehicle according to the present invention.
4 is a view illustrating a state in which a refrigerant and coolant are circulated in a heating mode of the heating/cooling system for a vehicle according to the present invention.
5 is a diagram illustrating a state in which a refrigerant and coolant are circulated in a high-temperature heating/dehumidifying mode of the heating/cooling system for a vehicle according to the present invention.
6 is a diagram illustrating a state in which a refrigerant and coolant are circulated in a low-temperature heating/dehumidifying mode of the heating/cooling system for a vehicle according to the present invention.
7 is a diagram illustrating a state in which a refrigerant and coolant are circulated in the mild heating/dehumidifying mode of the heating/cooling system for a vehicle according to the present invention.
8 is a diagram illustrating a state in which a refrigerant and a coolant are circulated in the cooling battery cooperative mode of the heating/cooling system for a vehicle according to the present invention.
9 is a graph showing the correlation between the pressure differential for each length of the dehumidification passage shown in FIG. 2 and the evaporator dehumidification performance according thereto.

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 8, the vehicle heating and cooling system 100 according to an embodiment of the present invention includes a compressor 1100, an indoor condenser 1200, a water-cooled condenser 1300, and an outdoor condenser 1400, An evaporator 1500, an accumulator 1600, a battery chiller 1700, a first coolant line 1800, a second coolant line 1900, an expansion valve part 2000, and a sensor part 2100 and an on/off valve unit 2200 and a control unit 2300 .

Referring to FIG. 2 , in the vehicle air conditioning system 100 according to an embodiment of the present invention, a compressor 1100, an indoor condenser 1200, a water-cooled condenser 1300, an outdoor condenser 1400 are on the refrigerant circulation line through which the refrigerant circulates. , the evaporator 1500 is connected, and is 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 capacitor 1200 .

The indoor condenser 1200 is provided in an air conditioning case (not shown), and the indoor condenser 1200 introduces a high-temperature and high-pressure refrigerant (gas) discharged from the compressor 1100 through a first flow path R1. . The indoor condenser 1200 condenses the high-temperature and high-pressure refrigerant (gas) flowing inside through heat exchange with the air supplied into the vehicle interior through the air conditioning case (not shown), and heats the air with the heat of condensation, thereby heating the vehicle interior. to be heated.

The structure of the air conditioning case (not shown) and the process of supplying heat-exchanged air to the interior of the vehicle after the air conditioning case (not shown) introduces air to be heated are known techniques, and detailed description thereof will be omitted. decide to do

An output terminal of the indoor capacitor 1200 is connected to a second flow path R2 , and the second flow path R2 is connected to a water-cooled capacitor 1300 . The water-cooled condenser 1300 introduces the refrigerant discharged from the indoor condenser 1200 through the second flow path R2, and the second- 1 The cooling water line 1910 serves to condense and evaporate the refrigerant through heat exchange with the cooling water flowing into the line 1910 . It is preferable that a first expansion valve 2010 of an expansion valve part 2000 to be described later is provided on the second flow path R2.

The water-cooled condenser 1300 is connected to the outdoor condenser 1400 by a third flow path R3. The outdoor capacitor 1400 condenses the refrigerant introduced through the third passage R3 through heat exchange with external air, and then discharges it to the fourth passage R4 through the output terminal. The fourth flow path R4 is connected to the evaporator 1500 and supplies the refrigerant output after being condensed in the outdoor condenser 1400 to the evaporator 1500 .

The outdoor condenser 1400 draws in refrigerant from the water-cooled condenser 1300 and condenses the refrigerant through heat exchange with external air. It is disposed close to (RAD), and after condensing the refrigerant introduced through the input side by heat exchange with external air, it is discharged to the fourth flow path (R4).

The evaporator 1500 is connected to the accumulator 1600 by a fifth flow path R5, and the accumulator 1600 is provided between the evaporator 1500 and the compressor 1100 to temporarily store the supplied refrigerant. While the incoming refrigerant is separated into a liquid refrigerant and a gaseous refrigerant, the separated vapor refrigerant is supplied to the compressor 1100 through the sixth flow path R6.

Bypass is branched from the fourth flow path R4 connecting the outdoor capacitor 1400 and the evaporator 1500 and is connected to a fifth flow path R5 connecting the evaporator 1500 and the accumulator 1600 . A battery chiller 1700 is provided on the flow path BR. The battery chiller 1700 serves to cool the battery B by exchanging the coolant flowing through the 2-2 cooling water passage 1920 to be described later in the cooling battery cooperative mode and the refrigerant flowing into the bypass passage BR. do In the cooling battery cooperative mode to be described later, the refrigerant flows to the bypass flow path BR. By exchanging the cooling water of the 2-2 cooling water line 1920 to cool the cooling water, thermal management of the battery B is possible by the 2-2 cooling water line 1920 .

The first radiator RAD1 of the radiator unit RAD disposed adjacent to the outdoor capacitor 1400 and the water-cooled condenser 1300 are connected by a first cooling water line 1800 to circulate the cooling water, and the radiator unit The second radiator RAD2 of RAD, the water-cooled capacitor 1300, the battery chiller 1700, and the battery B are connected by a second coolant line 1900 to circulate the coolant.

The first coolant line 1800 includes a first reservoir tank 1810 , a first direction switching valve 1820 , a first coolant bypass line 1830 , and a first pump 1840 . A first reservoir tank 1810 is installed in the first coolant line 1800, and coolant circulating in the first coolant line 1800 is stored in the first reservoir tank 1810, and the first coolant line ( 1800), the first direction switching valve 1820 is provided to switch the flow of the coolant circulating in one direction.

The first reservoir tank 1810 and the first direction switching valve 1820 are connected by a first coolant bypass line 1830 , and the first reservoir tank is connected by the first coolant bypass line 1830 . 1810 and the first directional selector valve 1820 are connected, so that the coolant circulates without going through the first radiator RAD1, and the coolant stored in the first reservoir tank 1810 is transferred to the first pump 1840. After cooling the vehicle driving unit (drive motor, not shown) by the water-cooled condenser 1300 is circulated.

The first reservoir tank 1810 is located at the rear end of the first radiator RAD1 of the radiator unit RAD, and the first direction switching valve 1820 is located at the front end of the first rider RAD1. desirable.

The second coolant line 1900 includes a 2-1 coolant line 1910 and a 2-2 coolant line 1920 . The 2-1 cooling water line 1910 connects the second writer RAD2 of the radiator unit RAD and the water-cooled capacitor 1300, and the 2-2 cooling water line 1920 is the second -1 is connected to the coolant line 1910 and connects the battery chiller 1700 and the battery B of the vehicle. The 2-1 th coolant line 1910 and the 2-2 coolant line 1920 are connected, and the 2-1 th coolant line 1910 and the 2-2 coolant line 1920 are connected. It is preferable that the second direction switching valve 1930 is provided.

A 2-1 pump 1940 is provided on the 2-1 coolant line 1910 to circulate the coolant stored in the second reservoir tank 1960 to the 2-1 coolant line 1910, and the On the 2-2 coolant line 1920, a 2-2 pump 1950 for circulating coolant to the 2-2 coolant line 1920, and between the battery B of the vehicle and the battery chiller 1700 It is preferable that a cooling water heater 1970 is provided in the air conditioner and heats the cooling water flowing to the 2-2 cooling water line 1920 .

3 and 8, in the cooling mode and in the cooling battery cooperative mode, cooling water is circulated through the first coolant line 1800 and the second coolant line 1900, and the first coolant line 1800 Cooling water is not circulated to the first coolant bypass line 1830 of

4 to 7 , in the heating mode, the high temperature heating and dehumidification mode, the low temperature heating and dehumidification mode, and the mild heating and dehumidification mode, the coolant does not circulate through the 2-2 coolant line 1920 and the cooling water does not circulate. Cooling water is circulated only through the first coolant line 1800 and the 2-1 coolant line 1910, and the circulated coolant is circulated to the first coolant bypass line 1830 so as not to circulate to the first radiator RAD1. do.

Referring to FIG. 2 , an expansion valve unit 2000 is provided on the second flow path R2 , the fourth flow path R4 , and the bypass flow path BR, and the expansion valve unit 2000 includes the first It serves to depressurize the refrigerant moving to the second flow passage R2, the fourth flow passage R4, and the bypass passage BR.

The expansion valve unit 2000 includes a first electromagnetic expansion valve 2010 , a solenoid expansion valve 2020 , and a second electromagnetic expansion valve 2030 . The first electronic expansion valve 2010 serves to expand the refrigerant flowing through the indoor condenser 1200 to the second flow path R2 to reduce pressure. The solenoid expansion valve 2020 is provided on the fourth flow path R4 adjacent to the evaporator 1500, and the solenoid expansion valve 2020 operates the outdoor capacitor 1400 in the cooling mode and in the cooling battery cooperative mode. It passes through and serves to expand the refrigerant supplied to the evaporator 1500 to reduce pressure, and in the indoor condenser 1200 in the high temperature heating and dehumidification mode, in the low temperature heating and dehumidifying mode, and in the mild heating and dehumidifying mode. The refrigerant supplied to the throttle is expanded while passing through an orifice hole (not shown) formed in the solenoid expansion valve 2020 , and then is supplied to the evaporator 1500 .

The second electronic expansion valve 2030 is provided on the bypass flow path BR adjacent to the battery chiller 1700, and expands the refrigerant passing through the outdoor capacitor 1400 in the cooling battery cooperative mode to reduce pressure. plays a role

A first flow path R1 adjacent to the indoor condenser 1200, a sixth flow passage R6 adjacent to the compressor 1100, and a sensor unit 2100 are provided adjacent to the outdoor condenser 1400, and the sensor unit Reference numeral 2100 serves to measure the pressure and temperature of the first flow path R1 and the sixth flow path R6 and the outdoor temperature outside the outdoor capacitor 1400 .

The sensor unit 2100 includes a PT sensor 2110 and an outdoor temperature sensor 2120 . The PT sensor 2110 is provided on the first flow path R1 adjacent to the indoor condenser 1200 and the sixth flow path R6 adjacent to the compressor 1100 to provide the first flow path R1 and the second flow path R1. A first sensor 2110a measuring the pressure and temperature of the first flow path R1 and a second sensor measuring the pressure and temperature of the sixth flow path R6 ( 2110b). The outdoor temperature sensor 2120 is provided adjacent to the outdoor condenser 1400 to measure the temperature of outdoor air from the outside of the outdoor condenser 1400, and the sensor unit 2100 is connected to a control unit 2300 to be described later. it is preferable

A dehumidification flow path DR branched from the second flow path R2 and connected to the fourth flow path R4, and a branch flow path QR branched from the third flow path R3 and connected to the fifth flow path R5 ) is provided with an on/off valve unit 2200 at a branching point from the third flow path R3, and a 2-way valve and a 3-way valve are preferably used as the on/off valve unit 2200.

The on-off valve unit 2200 includes a first on-off valve 2210 and a second on-off valve 2220 . The first on-off valve 2210 is provided on the dehumidification passage DR branched from the second passage R2 and connected to the fourth passage R4, and the first on-off valve 2210 is provided for high-temperature heating. In the dehumidification mode, in the low temperature heating and dehumidification mode, in the mild heating and dehumidifying mode, the dehumidification flow path (DR) is opened, and the evaporator ( 1500), and a two-way valve is used as the first on/off valve 2210.

Referring to FIG. 9 , the length of the dehumidification passage DR is preferably 500 mm or less. As the length of the dehumidification passage DR increases, the magnitude of the differential pressure generated according to the resistance inside the dehumidification passage DR increases. The evaluation result of the decrease in the evaporator temperature according to the expansion temperature for securing the dehumidifying performance for each length of the dehumidifying passage DR is shown in the graph of FIG. 9 .

Referring to FIG. 2 , the second on-off valve 2220 is provided at a point where a branch flow path QR connected to a fifth flow path R5 from the third flow path R3 branches off, and in the cooling mode, the high temperature In the heating/dehumidifying mode, and in the cooling battery cooperative mode, the refrigerant discharged from the water-cooled condenser 1300 is opened toward the outdoor condenser 1400 to be supplied to the outdoor condenser 1400 . In the heating mode, in the low-temperature heating and dehumidification mode, the refrigerant discharged from the water-cooled condenser 1300 is opened in the direction of the branch flow path (QR) to be supplied to the branch flow path (QR), and in the mild heating and dehumidification mode, the water-cooled condenser It is opened in the direction of the outdoor condenser 1400 and the branch flow path QR so that the refrigerant discharged from 1300 is supplied to the outdoor capacitor 1400 and the branch flow path QR, and the second on/off valve 2220 ), it is desirable to use a 3-way valve capable of full-open and step control.

The sensor unit 2100 and the opening/closing valve unit 2200 are connected to a control unit 2300, and the control unit 2300 controls opening and closing directions and opening/closing directions of the opening/closing valve unit 2200 in response to each mode and the compressor. It serves to control the opening and closing of the opening/closing valve unit 2200 based on the superheat of the refrigerant supplied to the air conditioner and the temperature of the outside air.

The control unit 2300 controls the expansion valve unit 2000 and the on/off valve unit 2200 according to the outside air temperature measured by the outside air temperature sensor 2120 to provide a high-temperature heating and dehumidification mode, a low-temperature heating and dehumidification mode, and mild heating. Switch to dehumidification mode.

The control unit 2300 switches to a high-temperature heating and dehumidification mode when the outdoor temperature measured by the outdoor temperature sensor 2120 is 17° C. or higher, and switches to a low-temperature heating and dehumidifying mode when the outdoor temperature is 3° C. or less, and the outdoor temperature When the temperature is 3℃ or more and 17℃ or less, it is switched to mild heating and dehumidifying mode.

3 is in the cooling mode, and the flow of the refrigerant in the cooling mode is the compressor 1100, the indoor condenser 1200, the water-cooled condenser 1300, the outdoor condenser 1400, the evaporator 1500, the accumulator 1600, the compressor ( 1100) to cool the interior of the vehicle. Looking at the flow of the coolant in the cooling mode, the coolant moving through the first coolant line 1800 and the 2-1 coolant line 1910 exchanges heat with the coolant in the water-cooled condenser 1300, and the coolant absorbed heat is transferred to the first radiator, respectively. Heat exchange with (RAD1) and the second radiator (RAD2).

The first on/off valve 2210 provided on the dehumidification passage DR branched from the second passage R2 and connected to the solenoid expansion valve 2020 provided on the fourth passage R4 is closed to close the The second on-off valve 2220 is provided at the point where the refrigerant moving to the second flow path R2 is not moved to the dehumidifying flow path DR, and the branch flow path QR is branched on the third flow path R3. It is opened in the direction of the outdoor condenser 1400 so that the refrigerant discharged from the water-cooled condenser 1300 is supplied to the outdoor condenser 1400 .

The first electromagnetic expansion valve 2010 provided on the second flow path R2 is opened to supply the refrigerant moving to the second flow path R2 to the water-cooled condenser 1300, and in the fourth flow path R4 The second electromagnetic expansion valve 2030 provided on the branching bypass flow path BR is closed to prevent the refrigerant moving to the fourth flow path R4 from moving to the bypass flow path BR, and the fourth The solenoid expansion valve 2020 provided at the front end of the evaporator 1500 on the flow path R4 expands the refrigerant moving to the fourth flow path R4 and supplies it to the evaporator 1500, and the evaporator 1500 The refrigerant passing through is separated into a liquid refrigerant and a gaseous refrigerant while passing through the accumulator 1600 , and the separated gaseous refrigerant is circulated to the compressor 1100 . In the cooling mode, the coolant circulates through the first coolant line 1800 and the 2-1 coolant line 1910, and the first bypass coolant line 1830 of the first coolant line 1800 changes the first direction. As the valve 1820 is opened in the direction of the first rider RAD1, it is sealed.

4 is a heating mode, the flow of refrigerant in the heating mode is circulated to the compressor 1100, the indoor capacitor 1200, the water-cooled condenser 1300, and the branch flow path (QR) through the accumulator 1600 and the compressor 1100. while heating the interior of the vehicle.

In the heating mode, the refrigerant is supplied to the water-cooled condenser 1300 through the compressor 1100, the indoor condenser 1200, and the first electromagnetic expansion valve 2010, and the refrigerant discharged from the water-cooled condenser 1300 is QR) is supplied to the accumulator 1600 . The refrigerant discharged from the water-cooled condenser 1300 is supplied to the compressor 1100 through the accumulator 1600. The second on-off valve 2220 is provided at a point where the branch flow path QR is branched from the third flow path R3. ) is opened in the direction of the branch flow path (QR) so that the refrigerant is supplied to the accumulator (1600), and the first on/off valve (2210) provided on the dehumidification flow path (DR) is closed to the second flow path (R2) Prevents the transferred refrigerant from being supplied to the fourth flow path R4 through the dehumidification flow path DR. The first electromagnetic expansion valve 2010 provided on the second flow path R2 is discharged from the indoor capacitor 1200 and then supplied to the water-cooled capacitor 1300 through the second flow path R2. After expansion, it is supplied to the water-cooled condenser 1300 , and the refrigerant discharged from the water-cooled condenser 1300 is supplied to the accumulator 1600 through the branch flow path QR. The refrigerant supplied to the accumulator 1600 is separated into a liquid refrigerant and a gaseous refrigerant, and the separated vapor refrigerant is circulated to the compressor 1100 . Looking at the flow of cooling water in the heating mode, the cooling water circulates only through the first cooling water line 1800 and exchanges heat with the refrigerant in the water cooling condenser 1300, and the cooling water is bypassed to the first cooling water bypass line 1830. There is no heat exchange with the radiator (RAD1).

5 is a high-temperature heating and dehumidifying mode, and in the high-temperature heating and dehumidification mode, the flow of the refrigerant passes through the compressor 1100 and the indoor condenser 1200, and then some refrigerant flows through the water-cooled condenser 1300, the outdoor condenser 1400, and the evaporator ( 1500), the accumulator 1600, and the compressor 1100, and the other part of the refrigerant that has passed through the indoor condenser 1200 passes through the dehumidification passage DR and the solenoid expansion valve 2020 to the evaporator 1500 and the accumulator (2020). 1600) and the compressor 1100 to heat and dehumidify the interior of the vehicle. In the high temperature heating and dehumidification mode, when the heating and dehumidifying mode is operated when the outdoor temperature measured by the outdoor temperature sensor 2120 is 17° C. or higher, the controller 2300 switches to the high temperature heating and dehumidifying mode.

The first on/off valve 2210 provided on the dehumidification passage DR branching from the second passage R2 is opened and a portion of the refrigerant transferred to the second passage R2 is transferred to the dehumidification passage DR. is supplied to the solenoid expansion valve 2020 provided on the fourth flow path R4 through is opened toward the outdoor condenser to supply the refrigerant discharged from the water-cooled condenser 1300 to the outdoor condenser 1400 .

The second electromagnetic expansion valve 2030 provided on the bypass flow path BR branching from the fourth flow path R4 is closed, and the refrigerant moving to the fourth flow path R4 moves to the bypass flow path BR. The solenoid expansion valve 2020 provided at the front end of the evaporator 1500 on the fourth flow path R4 is opened to supply the refrigerant moving to the fourth flow path R4 to the evaporator 1500 . do.

The first electromagnetic expansion valve 2010 provided on the second flow path R2 expands the refrigerant supplied to the water-cooled condenser 1300 through the second flow path R2, and opens the dehumidification flow path DR. The refrigerant supplied to the fourth flow path R4 through the throttle expands while passing through the orifice hole of the solenoid expansion valve 2020 and is then supplied to the evaporator 1500 . Looking at the flow of cooling water in the high-temperature heating and dehumidification mode, cooling water circulates through the first cooling water line 1800 and the 2-1 cooling water line 1910, and the first bypass cooling water of the first cooling water line 1800 The line 1830 is opened so that the cooling water does not circulate to the first radiator RAD1 of the radiator unit RAD, and the cooling water absorbed while exchanging heat with the refrigerant in the water-cooled condenser 1300 exchanges heat with the second radiator RAD2. will do In the high-temperature heating and dehumidification mode, it is possible to satisfy the heating target discharge temperature by minimizing the operation power consumption of the PTC by adjusting the rotation speed of the compressor 1100.

6 is a low-temperature heating and dehumidifying mode, and in the low-temperature heating and dehumidifying mode, the flow of refrigerant passes through the compressor 1100 and the indoor condenser 1200, and some refrigerant passes through the water-cooled condenser 1300, and then the branch flow (QR). The refrigerant circulates to the accumulator 1600 and the compressor 1100 through the evaporator 1500 and the accumulator 1600 through the dehumidification passage DR and the solenoid expansion valve 2020. , while circulating to the compressor 1100, heating and dehumidifying the interior of the vehicle are performed. In the low temperature heating and dehumidification mode, when the heating and dehumidifying mode is operated when the outdoor temperature measured by the outdoor temperature sensor 2120 is 3° C. or less, the control unit 2300 switches to the low temperature heating and dehumidifying mode.

The first on/off valve 2210 provided on the dehumidification passage DR branching from the second passage R2 is opened and a portion of the refrigerant transferred to the second passage R2 is transferred to the dehumidification passage DR. is supplied to the solenoid expansion valve 2020 provided on the fourth flow path R4 through is opened in the direction of the branch flow path (QR) to supply the refrigerant discharged from the water-cooled condenser 1300 to the accumulator 1600 through the branch flow path (QR).

The second electromagnetic expansion valve 2030 provided on the bypass flow passage BR branching from the fourth flow passage R4 and the solenoid expansion valve 2020 provided on the fourth flow passage R4 are closed, The first electromagnetic expansion valve 2010 provided on the second flow path R2 expands the refrigerant supplied to the water-cooled condenser 1300 through the second flow path R2, and opens the dehumidification flow path DR. The refrigerant supplied to the fourth flow path R4 through the throttle expands while passing through the orifice hole of the solenoid expansion valve 2020 and is then supplied to the evaporator 1500 . Looking at the flow of cooling water in the low-temperature heating and dehumidification mode, cooling water circulates through the first cooling water line 1800 and the 2-1 cooling water line 1910, and the first bypass cooling water of the first cooling water line 1800 The line 1830 is opened so that the cooling water does not circulate to the first radiator RAD1 of the radiator unit RAD, and the cooling water absorbed while exchanging heat with the refrigerant in the water-cooled condenser 1300 exchanges heat with the second radiator RAD2. will do In the low-temperature heating and dehumidification mode, optimization is possible under the external temperature 3 ° C or less, which is a refrigerant condition in which the refrigerant passing through the orifice hole (not shown) of the solenoid expansion valve 2020 in the first on/off valve 2210 can be expanded, and the heating line It is possible to secure the temperature of the refrigerant passing through the first flow path R1 as much as possible, so that it is possible to minimize the operation of the PTC to achieve the target discharge temperature.

7 is in the mild heating and dehumidifying mode, and in the mild heating and dehumidifying mode, the flow of refrigerant passes through the compressor 1100 and the indoor condenser 1200, and some refrigerant passes through the water-cooled condenser 1300. 1400, the evaporator 1500, the accumulator 1600, and the compressor 1100, and the other part of the refrigerant that has passed through the water-cooled condenser 1300 is an accumulator 1600 and a compressor 1100 through a branch flow path (QR). The other part of the refrigerant that has passed through the indoor condenser 1200 is circulated to the evaporator 1500, the accumulator 1600, and the compressor 1100 through the dehumidification passage DR and the solenoid expansion valve 2020 while circulating in the vehicle interior. of heating and dehumidification. In the mild heating and dehumidifying mode, when the outside temperature measured by the outdoor temperature sensor 2120 is 3°C or more and 17°C or less, the control unit 2300 switches to the mild heating and dehumidifying mode when the heating and dehumidifying mode is operated.

The first on/off valve 2210 provided on the dehumidification passage DR branching from the second passage R2 is opened and a portion of the refrigerant transferred to the second passage R2 is transferred to the dehumidification passage DR. is supplied to the solenoid expansion valve 2020 provided on the fourth flow path R4 through is opened in the direction of the outdoor condenser 1400 and the branch flow path QR, and supplies the refrigerant discharged from the water-cooled condenser 1300 to the outdoor condenser 1400 and the branch flow path QR.

The second electromagnetic expansion valve 2030 provided on the bypass flow path BR branching from the fourth flow path R4 is closed so that the refrigerant moving to the fourth flow path R4 moves to the bypass flow path BR. make sure it doesn't happen The solenoid expansion valve provided at the front end of the evaporator 1500 on the fourth flow path R4 is opened to supply the refrigerant moving through the fourth flow path R4 to the evaporator 1500 . The first electromagnetic expansion valve 2010 provided on the second flow path R2 through which the refrigerant discharged from the indoor condenser 1200 moves is supplied to the water-cooled condenser 1300 through the second flow path R2. The refrigerant expands the refrigerant, and the refrigerant supplied to the fourth flow path R4 through the dehumidification flow path DR branched from the second flow path R2 passes through the orifice hole (not shown) of the solenoid expansion valve 2020. After being expanded while being throttled, it is supplied to the evaporator 1500 . Looking at the flow of coolant in the mild heating and dehumidification mode, coolant circulates in the first coolant line 1800 and the second coolant line 1910, and the first bypass coolant in the first coolant line 1800 The line 1830 is opened so that the cooling water does not circulate to the first radiator RAD1 of the radiator unit RAD, and the cooling water absorbed while exchanging heat with the refrigerant in the water-cooled condenser 1300 exchanges heat with the second radiator RAD2. will do In the mild heating/dehumidifying mode, the refrigerant discharged from the water-cooled condenser 1300 through the second opening/closing valve 2220, which is a three-way valve provided on the third flow path R3, is discharged through the branch flow path QR through the evaporator 1500. and the third flow path R3 can be sent to the outdoor condenser 1400, so that heating performance and dehumidification performance can be satisfied.

8 is in the cooling battery cooperative mode, and in the cooling battery cooperative mode, the flow of refrigerant flows through the compressor 1100, the indoor condenser 1200, the water cooling condenser 1300, and the outdoor condenser 1400. 1500), the accumulator 1600, and the compressor 1100, and the other part of the refrigerant that has passed through the outdoor capacitor 1400 passes through the bypass flow path BR to the battery chiller 1700, the accumulator 1600, and the compressor ( 1100) to cool the interior of the vehicle.

The first on/off valve 2210 provided on the dehumidification passage DR branching from the second passage R2 is closed to prevent the refrigerant from moving to the dehumidification passage DR, and is disposed on the third passage R3 The second opening/closing valve 2220 provided in is opened in the direction of the outdoor condenser 1400 so that the refrigerant discharged from the water-cooled condenser 1300 is supplied to the outdoor condenser 1400 .

The first electromagnetic window valve 2010 provided on the second flow path R2 is opened so that the refrigerant discharged from the indoor condenser 1200 is supplied to the water-cooled condenser 1300, and the fourth flow path R4 The solenoid expansion valve 2020 provided on the top and the second electromagnetic expansion valve 2030 provided on the bypass flow path BR include the refrigerant supplied to the evaporator 1500 through the fourth flow path R4 and The refrigerant supplied to the battery chiller 1700 through the bypass passage BR is expanded.

Looking at the flow of coolant in the cooling battery cooperative mode, the coolant moving through the first coolant line 1800 and the 2-1 coolant line 1910 exchanges heat with the coolant in the water-cooled condenser 1300, The first radiator (RAD1) and the second radiator (RAD2) exchange heat with each other, and the first bypass coolant line 1830 of the first coolant line 1800 has a first direction switching valve 1820 connected to the first rider ( As it opens in the RAD1) direction, it is sealed.

Therefore, it is possible to secure fast-acting dehumidification performance by composing an optimal refrigerant line for each outdoor temperature, to minimize power consumption with an efficient PTC usage logic, and to secure optimal dehumidification conditions by two-stage expansion of the minimum flow rate. It is possible to maintain a stable temperature of the dehumidification line. In addition, by branching the dehumidification passage DR from the second passage R2 adjacent to the indoor condenser 1200 and connecting it with the solenoid expansion valve 2020, the length of the dehumidification passage DR is shortened to minimize the differential pressure while dehumidifying. The maximum refrigerant flow can be supplied to the evaporator 1500 through the flow path DR, and the refrigerant is throttled by the orifice hole formed in the solenoid expansion valve 2020 installed in the dehumidification flow path DR to maintain a constant dehumidification performance. It is possible, and it is possible to improve the refrigerant passage noise generated when the circuit is opened by the differential pressure.

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 heating and cooling system 1100: compressor
1200: indoor condenser 1300: water-cooled condenser
1400: outdoor capacitor 1500: evaporator
1600: accumulator 1700: battery chiller
1800: first coolant line 1900: second coolant line
2000: expansion valve unit 2100: sensor unit
2200: on/off valve unit 2300: control unit
RAD: radiator part RAD1: first radiator
RAD2 : 2nd radiator

Claims (16)

a compressor for compressing the introduced refrigerant and discharging it in a gaseous state of high temperature and high pressure;
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;
a water-cooled condenser connected to the indoor condenser by a second flow path and condensing the refrigerant through heat exchange with cooling water by introducing a refrigerant discharged from the indoor condenser;
an outdoor condenser connected to the water-cooled condenser by a third flow path and condensing the refrigerant through heat exchange with external air by introducing the refrigerant discharged from the water-cooled condenser;
an evaporator connected to the outdoor condenser by a fourth flow path and cooling the interior of the vehicle by heat exchange with air supplied to the interior of the vehicle through the air conditioning case while introducing the refrigerant discharged from the outdoor condenser to vaporize the refrigerant;
The evaporator is connected to the evaporator by a fifth passage, and the compressor is connected by a sixth passage. In the cooling mode and high temperature heating/dehumidifying mode, the refrigerant is supplied from the evaporator, and in the heating mode, the water-cooled condenser through a branch passage In the case of supplied refrigerant, low-temperature heating and dehumidifying mode, and mild heating and dehumidifying mode, the refrigerant supplied from the water-cooled capacitor and the evaporator is temporarily stored, the stored refrigerant is separated into a liquid refrigerant and a gaseous refrigerant, and the separated gaseous refrigerant is used in the compressor accumulator supplied with;
a battery chiller provided on a bypass passage branched from the fourth passage and connected to the fifth passage and condensing the refrigerant through heat exchange with cooling water in a cooling mode and a cooling battery cooperative mode;
a first coolant line for circulating coolant by connecting a first radiator of a radiator part disposed adjacent to the outdoor capacitor and the water-cooled capacitor;
a second coolant line including a 2-1 coolant line and a 2-2 coolant line connecting the second radiator of the radiator unit, the water-cooled capacitor, and the battery chiller to circulate coolant;
an expansion valve unit provided on the second passage, the fourth passage, and the bypass passage to depressurize the refrigerant moving to the second passage, the fourth passage, and the bypass passage;
a sensor unit provided on the first flow path adjacent to the indoor condenser and the sixth flow path adjacent to the compressor and adjacent to the outdoor condenser for measuring the pressure and temperature of the first flow path and the sixth flow path and the temperature of outside air;
an opening/closing valve unit provided on a dehumidification passage branched from the second passage and connected to the fourth passage, at a point where the branching passage is branched from the third passage to be connected to the fifth passage; and
and a control unit connected to the control unit and controlling opening and closing of the opening/closing valve unit based on the opening/closing direction of the opening/closing valve unit and the superheat degree of the refrigerant supplied to the compressor and the temperature of outside air in response to each mode.
3. The method according to claim 2,
The length of the dehumidification passage is 500 mm or less,
The on/off valve unit is a heating and cooling system for a vehicle, characterized in that a 2-way valve and a 3-way valve are used.
The method according to claim 1,
The first coolant line,
a first reservoir tank in which coolant circulated to the first coolant line is stored;
a first directional switching valve provided on the first coolant line and configured to switch the flow of coolant circulated to the first coolant line;
a first coolant bypass line connecting the first reservoir tank and the first direction switching valve;
and a first pump circulating the coolant stored in the first reservoir tank to the first coolant line.
The method according to claim 1,
The second coolant line,
a 2-1 cooling water line connecting the second radiator of the radiator part and the water-cooled condenser;
and a 2-2 coolant line connected to the 2-1 coolant line and connecting the battery chiller and a vehicle battery,
A second direction switching valve is provided at a point where the second-first coolant line and the second-second coolant line are connected.
5. The method according to claim 4,
A 2-1 pump for circulating the coolant stored in the second reservoir tank to the 2-1 coolant line is provided on the 2-1 coolant line;
A 2-2 pump is provided on the 2-2 coolant line to circulate the coolant to the 2-2 coolant line,
A cooling water heater provided between the battery of the vehicle and the battery chiller on the 2-2 coolant line and heating the coolant flowing into the 2-2 coolant line is provided.
The method according to claim 1,
The expansion valve unit,
a first electronic expansion valve provided at the front end of the water-cooled condenser on the second flow path to expand and reduce the pressure of the refrigerant supplied from the indoor condenser to the water-cooled condenser in heating mode, high temperature and low temperature and mild heating and dehumidification mode;
A solenoid expansion valve that is provided at the front end of the evaporator on the fourth flow path and expands the refrigerant supplied to the evaporator through the fourth flow path in a cooling mode, a cooling battery cooperative mode, a high temperature heating and dehumidifying mode, and a mild heating and dehumidifying mode to reduce pressure. Wow,
a second electronic expansion valve provided at the front end of the battery chiller on the bypass flow path to expand and reduce the pressure of the refrigerant supplied to the battery chiller through the bypass flow path in a cooling battery cooperative mode;
An orifice hole is formed in the solenoid expansion valve to which one end of the dehumidification passage branching from the second passage is connected, and the refrigerant supplied to the fourth passage through the dehumidification passage in high temperature and low temperature and mild heating and dehumidification mode is the orifice. A cooling and heating system for a vehicle, characterized in that the pressure is reduced by being throttled through the hole.
The method according to claim 1,
The on-off valve unit,
a first opening/closing valve provided on the dehumidification passage branched from the second passage and connected to the fourth passage to open and close the dehumidification passage;
and a second opening/closing valve provided at a branching point of the branch flow path from the third flow path to control the flow direction of the refrigerant moving to the third flow path,
A two-way valve is used as the first on/off valve, and a three-way valve capable of full open and step control is used as the second on/off valve.
8. The method of claim 7
The second on-off valve provided at the branching point of the branch flow path in the third flow path can be opened simultaneously in the direction of the outdoor capacitor and the branch flow path, and partially so that the refrigerant flows at the same time according to the differential pressure of each refrigerant circuit. A heating and cooling system for a vehicle, characterized in that it uses a 3-way valve that can be controlled to open.
The method according to claim 1,
The sensor unit,
a PT sensor provided on the first flow path adjacent to the indoor condenser and the sixth flow path adjacent to the compressor and measuring the pressure and temperature of the first flow path and the sixth flow path;
It includes an outdoor temperature sensor that measures the temperature of the outside air,
The heating and cooling system for a vehicle, characterized in that the sensor unit is connected to the control unit.
10. The method of claim 9,
The control unit is
According to the outdoor temperature measured by the outdoor temperature sensor, the expansion valve unit and the opening/closing valve unit are controlled to switch to a high temperature heating and dehumidifying mode, a low temperature heating and dehumidifying mode, and a mild heating and dehumidifying mode,
High-temperature heating and dehumidification mode when the outdoor temperature measured by the outdoor temperature sensor is 17°C or higher, low-temperature heating/dehumidifying mode when the outdoor temperature is 3°C or lower, and mild heating and dehumidifying mode when the outdoor temperature is 3°C or higher and 17°C or lower A heating and cooling system for a vehicle, characterized in that it operates.
The method according to claim 1,
In cooling mode,
The first on-off valve of the on-off valve provided on the dehumidification passage is closed, and the second on-off valve of the on-off valve provided at a point where the branch passage is branched from the third passage is opened in the direction of the outdoor capacitor,
The first electromagnetic expansion valve of the expansion valve part provided on the second flow passage is opened, the second electromagnetic expansion valve of the expansion valve part provided on the bypass flow passage is closed, and the expansion valve part provided on the fourth flow passage is closed. The solenoid expansion valve expands the refrigerant supplied to the evaporator through the fourth flow path,
Cooling water is circulated through the first coolant line, the 2-1 coolant line and the 2-2 coolant line, and the first bypass coolant line of the first coolant line is sealed.
The method according to claim 1,
In heating mode,
The first on-off valve of the on-off valve provided on the dehumidification passage is closed, and the second on-off valve of the on-off valve provided at a point where the branch passage is branched from the third passage is opened in the direction of the branching passage,
The solenoid expansion valve of the expansion valve unit provided on the fourth flow path and the second electromagnetic expansion valve of the expansion valve unit provided on the bypass flow path are closed, and the first electromagnetic expansion valve of the expansion valve unit provided on the second flow path is closed. expands the refrigerant supplied to the water-cooled condenser through the second flow path,
The cooling water system for a vehicle, characterized in that the coolant is circulated to the first coolant line, and the first bypass coolant line of the first coolant line is opened so that the coolant does not circulate to the first radiator of the radiator part.
The method according to claim 1,
In high temperature heating and dehumidification mode,
The first on-off valve of the on-off valve provided on the dehumidification passage is opened, and the second on-off valve of the on-off valve provided at a point where the branch passage is branched from the third passage is opened in the direction of the outdoor capacitor,
The second electromagnetic expansion valve of the expansion valve unit provided on the bypass flow path is closed, the solenoid expansion valve of the expansion valve unit provided on the fourth flow path is opened, and the first expansion valve unit provided on the second flow path is closed. The electromagnetic expansion valve expands the refrigerant supplied to the water-cooled condenser through the second flow path, and the refrigerant supplied to the fourth flow path through the dehumidification flow path is throttled while passing through the orifice hole of the solenoid expansion valve,
Cooling water is circulated to the first coolant line and the 2-1 coolant line, and the first bypass coolant line of the first coolant line is opened so that the coolant does not circulate to the first radiator of the radiator part Heating and cooling systems for vehicles.
The method according to claim 1,
In low temperature heating and dehumidification mode,
The first on-off valve of the on-off valve provided on the dehumidification passage is opened, and the second on-off valve of the on-off valve provided at a point where the branch passage is branched from the third passage is opened in the direction of the branching passage,
The second electromagnetic expansion valve of the expansion valve unit provided on the bypass flow path and the solenoid expansion valve of the expansion valve unit provided on the fourth flow path are closed;
The first electromagnetic expansion valve of the expansion valve part provided on the second flow path expands the refrigerant supplied to the water-cooled condenser through the second flow path, and the refrigerant supplied to the fourth flow path through the dehumidification flow path is the solenoid It is throttled while passing through the orifice hole of the expansion valve,
Cooling water is circulated to the first coolant line and the 2-1 coolant line, and the first bypass coolant line of the first coolant line is opened so that coolant does not circulate to the first radiator of the radiator part Heating and cooling systems for vehicles.
The method according to claim 1,
In mild heating/dehumidifying mode,
The first on-off valve of the on-off valve provided on the dehumidification passage is opened, and the second on-off valve of the on-off valve provided at a point where the branch passage is branched from the third passage is in the direction of the outdoor capacitor and the branching passage. is opened to
The second electromagnetic expansion valve of the expansion valve unit provided on the bypass flow path is closed, the solenoid expansion valve of the expansion valve unit provided on the fourth flow path is opened, and the first expansion valve unit provided on the second flow path is closed. The electromagnetic expansion valve expands the refrigerant supplied to the water-cooled condenser through the second flow path, and the refrigerant supplied to the fourth flow path through the dehumidification flow path is throttled while passing through the orifice hole of the solenoid expansion valve,
Cooling water is circulated to the first coolant line and the 2-1 coolant line, and the first bypass coolant line of the first coolant line is opened so that the coolant does not circulate to the first radiator of the radiator part Heating and cooling systems for vehicles.
The method according to claim 1,
In cooling battery cooperative mode,
The first on-off valve of the on-off valve provided on the dehumidification passage is closed, and the second on-off valve of the on-off valve provided at a point where the branch passage is branched from the third passage is opened in the direction of the outdoor capacitor,
The first electromagnetic expansion valve of the expansion valve unit provided on the second flow path is opened, and the solenoid expansion valve of the expansion valve unit provided on the fourth flow path and the second electromagnetic expansion valve of the expansion valve unit provided on the bypass flow path. expands the refrigerant supplied to the evaporator through the fourth passage and the refrigerant supplied to the battery chiller through the bypass passage,
Cooling water is circulated through the first coolant line, the 2-1 coolant line and the 2-2 coolant line, and the first bypass coolant line of the first coolant line is sealed.

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