KR20210114276A - Automotive air conditioning system - Google Patents

Abstract

The present invention comprises a compressor, an indoor condenser, a water cooling type condenser, an outdoor condenser, an evaporator, an accumulator, a first electronic expansion valve, a battery chiller, a first cooling water line, a second cooling water line, a second electronic expansion valve, a PT sensor, and 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 heating and cooling of a vehicle by using a refrigerant that is heat-exchanged with coolant in a water-cooled condenser.

In general, in electric vehicles, a driving motor or high voltage junction box (HV J/BOX) for driving a vehicle, a motor controller including an inverter (MCU: Motor Control Unit), an electric power converter (LDC: Low Voltage DC/DC Converter), etc. Electrical components such as various controllers and high voltage components are cooled to prevent thermal damage and maintain durability, but water cooling using cooling water is usually applied.

In such a water cooling type, the heat of the coolant circulated through each electrical component is emitted through a radiator (hereinafter referred to as an electrical radiator). The coolant is dissipating heat.

In the case of electric vehicles, electric vehicle parts must be cooled by water cooling instead of the engine, so an electric radiator is installed instead of the existing engine radiator, and the external air or driving wind sucked by the cooling fan passes through the electric radiator to release the heat of the coolant. .

In general, the cooling system of an electric vehicle consists of a cooling water line passing through electronic components (VSD100, MCU, LDC, HV J/BOX, Motor), an air-cooled radiator for dissipating the heat of the cooling water, a cooling water pump, and a cooling fan. At this time, the electric radiator is disposed behind the condenser for the air conditioner.

The air-conditioner condenser and electric radiator are arranged in front and rear and are commonly cooled by the intake air of the cooling fan or the running wind. air-cooled, and the electric radiator plays a role of cooling the cooling water that is heat-exchanged from various high-voltage electric components.

However, the biggest problem with conventional cooling modules such as electric radiators and condensers is that even when trying to increase the thickness of electric radiators considering the lack of heat dissipation performance and capacity of electric radiators for cooling electric parts, there is a limit due to the limited installation space. point.

In case of increasing the thickness of the full-length radiator, since the thickness of the condenser has to be reduced in a limited installation space, the cooling performance of the vehicle is disadvantageous due to the reduction of the condenser. As the thickness of the product increases, it becomes difficult to secure an installation space.

In addition, since the capacitor is disposed in front of the electric radiator, the resistance of the external air flowing in from the front of the vehicle, that is, the ventilation resistance, is increased in the electric radiator, and thus the cooling performance of the electric parts is deteriorated.

As a prior art, reference may be made to Korean Patent Publication No. 10-2012-0059730 (June 11, 2012).

Conventionally, there is a problem in that it is impossible to configure an optimal refrigerant flow path for maximizing cooling and heating performance in a system that has the same heat exchanger (water-cooled condenser) and serves as a condenser and an evaporator at the same time.

In addition, minimization of refrigerant entropy and high pressure through proper supercooling of the high-temperature and high-pressure gas refrigerant discharged from the compressor through the condensing process must be done in the cooling circuit, but only the parts on the existing circuit can be grown within a certain range, so the power consumption of the compressor is reduced. There was a limit to minimization.

In addition, there is a problem in that the operating range and time of the high voltage PTC increase due to the continuous shortage of heat sinks only with the heat pump system during heating, and thus the travel distance is reduced.

The present invention was created to solve the above problems, and the present invention was created to solve the above problems. It is possible to change the flow direction of the refrigerant passing through the water-cooled condenser acting as a heat exchanger to change the optimal refrigerant inlet/outlet for each mode. An object of the present invention is to provide a cooling and heating system for a vehicle that can obtain the effect of power consumption of the compressor by increasing the amount of heat generated by the temperature and reducing the refrigerant pressure in advance to obtain the effect of reducing the refrigerant temperature to the level of the refrigerant saturation pressure.

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 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 the 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 room by heat exchange with air supplied to the vehicle interior through the air conditioning case while introducing the refrigerant discharged from the outdoor condenser to vaporize the refrigerant; An accumulator disposed adjacent to the compressor and connected to the evaporator by a fifth flow path, temporarily storing the refrigerant supplied from the evaporator, separating the incoming refrigerant into a liquid refrigerant and a gaseous refrigerant, and supplying the gaseous refrigerant to the compressor ; a first electromagnetic expansion valve provided at a front end of the water-cooled condenser on the second flow path to depressurize the refrigerant that has passed through the indoor condenser; a battery chiller provided on a first bypass line branched from the fourth flow path and connected to the fifth flow path; a first coolant line for circulating coolant by connecting a first radiator of a radiator part disposed adjacent to the outdoor condenser and the water-cooled condenser; a second coolant line including a 2-1 coolant line and a 2-2 coolant line for circulating coolant by connecting the second radiator of the radiator unit, the water-cooled condenser, and the battery enclosure to a vehicle battery; a second electronic expansion valve provided on the first bypass line adjacent to the battery chiller and depressurizing the refrigerant that has passed through the outdoor condenser in the cooling battery cooperative mode; a PT sensor provided on the first flow path adjacent to the indoor condenser and a sixth flow path connecting the compressor and the accumulator adjacent to the compressor, the PT sensor measuring pressures and temperatures of the first and sixth flow paths; A first branch passage branched from the rear end of the compressor provided on the second passage and connected to the second passage, a point at which a second branch passage is branched from the third passage to be connected to the fifth passage, and an opening/closing valve unit provided in a second bypass line branched from a front end of the first electromagnetic expansion valve provided on the second flow path and connected to the fourth flow path; and a control unit connected to the PT sensor and controlling opening and closing of the opening/closing valve unit based on an opening/closing direction of the opening/closing valve unit and a degree of superheat of the refrigerant supplied to the compressor in response to each mode, wherein the opening/closing valve unit includes 2 It provides a heating and cooling system for a vehicle, characterized in that a way valve and a 3-way valve are used.

In the heating and cooling system for a vehicle according to the present invention, the first coolant line includes a first reservoir tank in which coolant circulated to the first coolant line is stored, and is provided on the first coolant line and circulated to the first coolant line. a first directional selector valve for switching the flow of the cooling water to be used; a first coolant bypass line connecting the first reservoir tank and the first directional selector valve; It may include a first pump circulating in the line.

The first reservoir tank may be located at a rear end of the first radiator of the radiator unit, and the first direction switching valve may be located at a place connecting the first reservoir tank and the first radiator.

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

A 2-1 pump that circulates 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 on the 2-2 coolant line to the second coolant line. A 2-2 pump circulating to the 2-2 coolant line may be provided, and on the 2-2 coolant line, the coolant is provided between the battery of the vehicle and the battery chiller and flows into the 2-2 coolant line. A coolant heater may be provided to heat the .

The opening/closing valve part includes a first opening/closing valve provided on the first branch flow path and selectively opening/closing the first branch flow path connecting the first flow path and the second flow path, and the second branching in the third flow path. A second opening/closing valve provided at a branching point of the flow path, and a third branch provided on a second bypass line connected to the fourth flow path by branching from the second flow path and selectively opening and closing the second bypass line It may include an on-off valve, the first on-off valve and the third on-off valve may be a 2-way valve, and the second on-off valve may be a 3-way valve.

The control unit may open the first on/off valve when the superheat of the refrigerant supplied to the compressor is below a set temperature, and closes the first on/off valve when the superheat of the refrigerant supplied to the compressor is above the set temperature can be closed

The heating and cooling system for a vehicle according to the present invention may further include a solenoid expansion valve provided on the fourth flow path adjacent to the evaporator to expand the refrigerant supplied to the evaporator, and one end of the second bypass line is the solenoid. It may be connected to the fourth flow path between the expansion valve and the evaporator.

In the cooling mode, the first opening/closing valve of the opening/closing valve unit provided on the first branch flow path may be opened, and the second opening/closing valve of the opening/closing valve unit provided at a point where the second branch flow path is provided in the third flow path. may be opened in the direction of the outdoor condenser, the second electromagnetic expansion valve provided on the first bypass line may be closed, and the third on/off valve of the on/off valve unit provided on the second bypass line may be closed. The solenoid expansion valve provided on the fourth flow path may expand, and the cooling water may circulate through the first cooling water line and the 2-1 cooling water line, and the first bypass of the first cooling water line. The pass coolant line may be sealed.

In the heating mode, the first opening/closing valve of the opening/closing valve provided on the first branch flow path may be selectively opened and closed according to the degree of superheat of the compressor, and in the third flow path at a point where the second branch flow path is provided. The second opening/closing valve of the on-off valve unit may be opened in the direction of the accumulator connected to the fifth flow path, and a second electromagnetic expansion valve provided on the first bypass line and provided on the second bypass line The third opening/closing valve of the on/off valve unit and the solenoid expansion valve provided on the fourth flow path may be closed, the cooling water may be circulated to the first cooling water line, and the first bypass cooling water line of the first cooling water line may be It is opened and the coolant may not circulate to the first radiator of the radiator part.

In the heating and dehumidification mode, the first opening/closing valve of the opening/closing valve provided on the first branch flow path may be selectively opened and closed according to the degree of superheat of the compressor, and the point at which the second branch flow path is provided in the third flow path The second opening/closing valve of the opening/closing valve unit provided in the The third opening/closing valve of the opening/closing valve provided on the pass line may be opened, the solenoid expansion valve provided on the fourth flow path may be closed, and the coolant may be circulated to the first coolant line, and the first The first bypass coolant line of the 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 opening/closing valve of the opening/closing valve unit provided on the first branch flow path may be closed, and the second opening/closing valve unit of the opening/closing valve unit provided at a point where the second branch flow path is provided in the third flow path. The valve may be opened in the direction of the outdoor condenser, the second electromagnetic expansion valve provided on the first bypass line may be opened, and the third on/off valve of the on/off valve unit provided on the second bypass line. can be closed, the solenoid expansion valve provided on the fourth flow path can be expanded, and cooling water can circulate through the first coolant line, the 2-1 coolant line, and the 2-2 coolant line, 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 uses 2-way valves and 3-way valves provided on a plurality of flow paths and bypass lines to change the flow direction of refrigerant passing through the system in cooling and heating modes, so that the optimum for each mode It is possible to realize the refrigerant efficiency of

In addition, by adding the first branch flow path connected from the first flow path to the second flow path during heating, it is possible to secure a margin for the compressor overheating degree toward the water-cooled condenser, and to increase the refrigerant temperature in the heating line and to achieve an intermediate pressure of the refrigerant pressure. Accordingly, it is possible to obtain the effect of increasing the refrigerant temperature to the level of the refrigerant saturation pressure, thereby obtaining the effect of reducing the power consumption of the compressor.

1 is a block diagram showing a heating and cooling system for a vehicle according to an embodiment of the present invention.
2 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.
3 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.
4 is a diagram illustrating a state in which a refrigerant and coolant are circulated in a heating/dehumidifying 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 a coolant are circulated in the cooling battery cooperative mode of the cooling/heating system for a vehicle according to the present invention.

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 their ordinary 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.

1 to 5, the vehicle air conditioning system 100 according to an embodiment of the present invention includes a compressor 1100, an indoor condenser 1200, a water-cooled condenser 1300, an outdoor condenser 1400, The evaporator 1500, the accumulator 1600, the first electromagnetic expansion valve 1700, the battery chiller 1800, the first coolant line 1900, the second coolant line 2000, the second electronic type It includes an expansion valve 2100 , a PT sensor 2200 , an on/off valve unit 2300 , and a control unit 2400 , and may further include a solenoid expansion valve 2500 .

Referring to FIG. 1 , a vehicle heating/cooling system 100 according to the present invention includes a compressor 1100, an indoor condenser 1200, a water-cooled condenser 1300, and an outdoor condenser 1400 on a refrigerant circulation line through which refrigerant circulates. And, the evaporator 1500 is connected, and is preferably applied to an electric vehicle or a hybrid vehicle.

The compressor 1100 is a so-called compressor, which draws in and compresses a refrigerant through an input terminal connected to a flow path through which the refrigerant flows, and then discharges the compressed refrigerant to the flow path through an output terminal. gas; gas).

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, so that 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 it 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 inside through heat exchange with the air supplied to 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) draws in air to be heated are well-known techniques, and detailed description thereof will be omitted. decide to do

An output terminal of the indoor condenser 1200 is connected to a second flow path R2 through which a refrigerant flows, and the second flow path R2 is connected to a water-cooled condenser 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 2010 serves to condense the refrigerant by heat exchange with the cooling water flowing into the line (2010). A first electromagnetic expansion valve 1700, which will be described later, is preferably provided on the second flow path R2.

The water-cooled condenser 1300 is connected to the outdoor condenser 14000 by a third passage R3, and the outdoor condenser 1400 converts the refrigerant introduced through the third passage R3 into heat exchange with external air. After condensing, it is discharged to a fourth flow path R4 through an output terminal, and the fourth flow path R4 is connected to the evaporator 1500 and the refrigerant output after being condensed in the outdoor condenser 1400 is transferred to the evaporator 1500 ) is supplied.

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.

A first electromagnetic expansion valve 1700 is provided on the second flow path R2, and the first electromagnetic expansion valve 1700 passes through the indoor condenser 1200 and flows into the second flow path R2. serves to depressurize the

A battery chiller 1800 is provided on the first bypass line BR1 branched from the fourth flow path R4 connecting the outdoor capacitor 1400 and the evaporator 1500 and connected to the fifth flow path R5. The battery chiller 1800 flows through the refrigerant flowing through the first bypass line BR1 and the second cooling water line 2020 among the second coolant lines 2000 to be described later in the cooling battery cooperative mode. heat exchange with the cooling water. In the cooling battery cooperative mode to be described later, the refrigerant flows to the first bypass line BR1, and at this time, the battery chiller 1800 connects the refrigerant of the first bypass line BR1 and a second coolant line ( 2000) by exchanging the coolant in the 2-2 coolant line 2020 to cool the coolant, so that the battery B can be thermally managed by the 2-2 coolant line 2020.

The first radiator RAD1 of the radiator unit RAD disposed adjacent to the outdoor condenser 1400 and the water-cooled condenser 1300 are connected by a first cooling water line 1900 to circulate the cooling water, and the radiator unit The second writer RAD2 of RAD, the water-cooled condenser 1300, the battery chiller 1800, and the battery B are connected by a 2-2 coolant line 2020 to circulate the coolant.

The first coolant line 1900 includes a first reservoir tank 1910 , a first direction switching valve 1920 , a first coolant bypass line 1930 , and a first pump 1940 . A first reservoir tank 1910 is installed in the first coolant line 1900, and coolant circulating in the first coolant line 1900 is stored in the first reservoir tank 1910, and the first coolant line ( 1900) is provided with the first direction switching valve 1920, the flow of the coolant circulating in one direction is switched.

The first reservoir tank 1910 and the first directional selector valve 1920 are connected by a first coolant bypass line 1930 , and the first reservoir tank by the first coolant bypass line 1930 . 1910 and the first directional selector valve 1920 are connected, so that the coolant circulates without passing through the first radiator RAD1, and the coolant stored in the first reservoir tank 1910 is transferred to the first pump 1940. After cooling the vehicle driving unit (drive motor, not shown) by the water-cooled condenser 1300 is circulated.

The first reservoir tank 1910 is located at the rear end of the first radiator RAD1 of the radiator unit RAD, and the first direction switching valve 1920 is located at the front end of the first rider RAD1. desirable.

The second coolant line 2000 includes a 2-1 coolant line 2010 and a 2-2 coolant line 2020, and the 2-1 coolant line 2010 is the radiator unit RAD. of the second write data (RAD2) and the water-cooled condenser 1300 are connected, the 2-2 coolant line 2020 is connected to the 2-1 coolant line 2010, and the battery chiller 1800 and Connect the battery (B) of the vehicle. The 2-1 th coolant line 2010 and the 2-2 coolant line 2020 are connected, and the 2-1 th coolant line 2010 and the 2-2 coolant line 2020 are connected. It is preferable that the second direction switching valve 2030 is provided.

A 2-1 pump 2040 is provided on the 2-1 coolant line 2010 to circulate the coolant stored in the second reservoir tank 2060 to the 2-1 coolant line 2010, and the A 2-2 pump 2050 for circulating coolant to the 2-2 coolant line 2020 is provided on the 2-2 coolant line 2020, and between the battery B of the vehicle and the battery chiller 1800 It is preferable that a cooling water heater 2070 is provided in the air conditioner and heats the cooling water flowing into the 2-2 cooling water line 2020.

2 and 5, in the cooling mode and the cooling battery cooperative mode, cooling water is circulated through the first coolant line 1900 and the second coolant line 2000, and the Cooling water is not circulated to the first coolant bypass line 1930 .

3 and 4 , in the heating mode and the heating and dehumidifying mode, the coolant does not circulate through the second coolant line 2000 and the coolant circulates only through the first coolant line 1900 , and the circulating coolant is circulated to the first coolant bypass line 1930 so as not to be circulated to the first radiator RAD1.

Referring to FIG. 1 , a second electromagnetic expansion valve 2100 is provided on the first bypass line BR1 adjacent to the battery chiller 1800 , and the second electronic expansion valve 2100 is connected to the first It serves to reduce the pressure of the refrigerant flowing to the bypass line (BR1). The structure and operation relationship of the second electromagnetic expansion valve 2100 are the same as those of the first electromagnetic expansion valve 1700, and a detailed description thereof will be omitted.

PT sensor 2200 on the first flow path R1 adjacent to the indoor condenser 1200 and on a sixth flow path R6 connecting the compressor 1100 adjacent to the compressor 1100 and the accumulator 1600 is provided, and the PT sensor 2200 serves to measure the pressure and temperature of the first flow path R1 and the sixth flow path R6, and the measured pressure and temperature are transmitted to a control unit 2400 to be described later. It is preferable to be

A first branch flow path QR1 branched from the first flow path R1 and connected to the rear end of the first electromagnetic expansion valve 1700 provided on a second flow path R2, the fifth flow path R5, In order to be connected, the branching point at which the second branch flow path QR2 is branched from the third flow path R3, and the front end of the first electronic expansion valve 1700 provided on the second flow path R2. On the second bypass line BR2 connected to the fourth flow passage R4, an on/off valve selectively opens and closes the first branch flow passage QR1, the second branch flow passage QR2, and the second bypass line BR2. A part 2300 is provided, and a 2-way valve and a 3-way valve are preferably used as the on-off valve part 2300 .

The on-off valve unit 2300 includes a first on-off valve 2310 , a second on-off valve 2320 , and a third on-off valve 2330 , and the first on-off valve 2310 is the first branch It is provided on the flow path QR1 and selectively opens and closes the first branch flow path QR1 by a control unit 2400 to be described later. The first opening/closing valve 2310 is opened in the cooling mode and the cooling battery cooperative mode and supplies the refrigerant transferred to the first flow path R1 to the water-cooled condenser 1300 through the second flow path R2, In the heating mode and heating and dehumidifying mode, the PT sensor 2200 selectively opens or closes according to the superheat of the refrigerant supplied to the compressor 1100 measured by the PT sensor 2200, and the first on/off valve 2310 is a 2-way valve. preferably used.

The second on-off valve 2320 is provided at a point where the second branch flow path QR2 branches on the third flow path R3, and is discharged from the water-cooled condenser 1300 in the cooling mode and the cooling battery cooperative mode. The valve is opened and closed so that the refrigerant is supplied to the outdoor condenser 1400, and in the heating mode and the heating and dehumidifying mode, the valve is opened and closed so that the refrigerant discharged from the water-cooled condenser 1300 is supplied to the second branch flow path QR2, , it is preferable that the second on-off valve 2320 is a 3-way valve.

The third on-off valve 2330 is provided on a second bypass line BR2 branched from the second flow passage R2 and connected to the fourth flow passage R4 to connect the second bypass line BR2. It selectively opens and closes, and it is preferable that the third opening/closing valve 2330 is a 2-way valve.

The PT sensor 2200 and the on/off valve unit 2300 are connected to a control unit 2400, and the control unit 2400 is supplied to each mode and the compressor 1100 measured by the PT sensor 2200. It serves to control the opening and closing of the opening/closing valve unit 2300 according to the degree of superheat of the refrigerant.

The control unit 2400 selectively opens and closes the first on/off valve 2310 according to the superheat of the refrigerant supplied to the compressor 1100 measured by the PT sensor 2200 in the heating mode and the heating and dehumidifying mode, , when the superheat of the refrigerant is below the set temperature, the first on/off valve 2310 is opened to bypass the refrigerant to prevent liquid compression of the compressor 1100, and when the superheat of the refrigerant is above the set temperature, the first By closing the on/off valve 2310 to secure the flow rate to the indoor condenser 1200, the heating heat source is maximized.

A solenoid expansion valve 2500 is provided on the fourth flow path R4 adjacent to the evaporator 1500, and the other end of the second bypass line BR2 is connected to the solenoid expansion valve 2500 and the evaporator 1500. is connected to the fourth flow path R4 between It is preferable to be connected to the second flow path R2 at the front end of the electromagnetic expansion valve 1700 .

2 is in the cooling mode, the flow of the refrigerant in the cooling mode after passing through the compressor 1100, the indoor condenser 1200, the water-cooled condenser 1300, the outdoor condenser 1400, the evaporator 1500, the accumulator 1600, It circulates through the compressor 1100 to cool the interior of the vehicle. Looking at the flow of the cooling water in the cooling mode, the cooling water moving through the first cooling water line 1900 and the 2-1 cooling water line 2010 is heat-exchanged with the refrigerant in the water cooling condenser 1300 and the cooling water absorbed heat is transferred to the first radiator, respectively. Heat exchange with (RAD1) and the second radiator (RAD2).

The second on-off valve 2320 provided at the branching point of the second branch flow path QR2 on the third flow path R3 is opened to supply refrigerant to the outdoor condenser 1400, and the second flow path R2 ) and the third on-off valve 2330 provided on the second bypass line BR2 connecting the fourth flow path R4 is closed so that the refrigerant transferred to the second flow path R2 passes through the second bypass line. It is prevented from being supplied to the fourth flow path R4 through the line BR2. In the cooling mode, the coolant circulates through the first coolant line 1900 and the 2-1 coolant line 2010, and the first bypass coolant line 1930 of the first coolant line 1900 changes the first direction As the valve 1920 is opened in the direction of the first rider RAD1, it is sealed.

3 is a heating mode, the flow of refrigerant in the heating mode through the compressor 1100, the indoor condenser 1200, the water-cooled condenser 1300, and the second branch flow path QR2, the accumulator 1600, the compressor 1100 circulating to heat the interior of the vehicle. Looking at the flow of coolant in the heating mode, the coolant circulates only through the first coolant line 1900 and exchanges heat with the coolant in the water-cooled condenser 1300 , and the coolant is bypassed to the first coolant bypass line 1930 . There is no heat exchange with the radiator (RAD1).

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 1700, and the refrigerant discharged from the water-cooled condenser 1300 is the second branch It is supplied to the accumulator 1600 through the flow path QR2. A second on-off valve provided at a point where the second branch flow path QR2 is branched from the third flow path R3 to supply the refrigerant discharged from the water-cooled condenser 1300 to the compressor 1100 through the accumulator 1600 . Reference numeral 2320 is opened so that the refrigerant is supplied to the accumulator 1600 .

4 is in the heating and dehumidifying mode, and in the heating and dehumidifying mode, the flow of refrigerant passes through the compressor 1100, the indoor condenser 1200, and the first electromagnetic expansion valve 1700, and then some of the refrigerant moves to the water-cooled condenser 1300. Then, it passes through the accumulator 1600 through the second branch flow path QR2, and then moves to the compressor 1100 in the order, and a part of the refrigerant passes through the second bypass line BR2 to the evaporator 1500 and the accumulator 1600. ) and the compressor 1100, heating and dehumidifying the interior of the vehicle is performed.

Looking at the flow of cooling water in the heating and dehumidifying mode, the cooling water circulates only through the first cooling water line 1900 and exchanges heat with the refrigerant in the water-cooled condenser 1300, and the cooling water is bypassed to the first cooling water bypass line 1930. 1 It does not exchange heat with the radiator (RAD1).

In the heating and dehumidification mode, the second opening/closing valve 2320 provided on the third flow path R3 is opened to supply the refrigerant to the accumulator 1600 through the second branch flow path QR2, and the water-cooled condenser ( 1300), the refrigerant moves in the order of the accumulator 1600 and the compressor 1100, and a part of the refrigerant branched from the front end of the first electronic expansion valve 1700 provided on the second flow path R2 is the second by The evaporator 1500, the accumulator 1600, and the compressor 1100 move in the order through the pass line BR2, and the third on/off valve 2330 provided on the second bypass line BR2 is opened and the A portion of the refrigerant in the second flow path R2 is supplied to the evaporator 1500 through the fourth flow path R4.

In the heating mode and in the heating and dehumidifying mode, a portion of the refrigerant discharged from the compressor 1100 may be supplied to the water-cooled condenser 1300 without passing through the indoor condenser 1200 and the first electronic expansion valve 1700. . The PT sensor 2200 measures the superheat degree of the refrigerant entering the compressor 1100 through the accumulator 1600. The first on-off valve 2310 is opened to move the refrigerant to the first branch flow path QR1 to prevent liquid compression of the compressor 1100, and when the superheat is higher than the set temperature, the first on-off valve 2310 is closed. Close to secure the flow rate to the indoor condenser 1200 to maximize the heating heat source.

5 is in the cooling battery cooperative mode, and in the cooling battery cooperative mode, the flow of refrigerant passes through the compressor 1100, the indoor condenser 1200, or the first branch flow path QR1, and then the water-cooled condenser 1300, outdoor The refrigerant is moved to the condenser 1400, and some refrigerant that has passed through the outdoor condenser 1400 circulates in the evaporator 1500, the accumulator 1600, and the compressor 1100, and the other refrigerant is transferred to the second electromagnetic expansion valve 2100. , the battery chiller 1800, the accumulator 1600, and the compressor 1100 are circulated to cool the interior of the vehicle. Looking at the flow of the cooling water in the cooling mode, the cooling water moving through the first cooling water line 1900 and the 2-1 cooling water line 2010 is heat-exchanged with the refrigerant in the water-cooled condenser 1300 and the cooling water is cooled to the first radiator, respectively. Heat exchange with (RAD1) and the second radiator (RAD2).

In the cooling mode, the solenoid expansion valve 2500 provided on the fourth flow path R4 and the second electromagnetic expansion valve 2100 provided on the first bypass line BR1 convert high-temperature, high-pressure refrigerant into low-temperature and low-pressure inflate with

The second on-off valve 2320 provided at the branching point of the second branch flow path QR2 on the third flow path R3 is opened to supply refrigerant to the outdoor condenser 1400, and the second flow path R2 ) and the third on-off valve 2330 provided on the second bypass line BR2 connecting the fourth flow path R4 is closed so that the refrigerant transferred to the second flow path R2 passes through the second bypass line. It is prevented from being supplied to the fourth flow path R4 through the line BR2. In the cooling mode, the coolant circulates through the first coolant line 1900 and the 2-1 coolant line 2010, and the first bypass coolant line 1930 of the first coolant line 1900 changes the first direction As the valve 1920 is opened in the direction of the first rider RAD1, it is sealed.

Although the present invention has been described with reference to the embodiment shown in the drawings, which is only exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be 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 condenser 1500: evaporator
1600: accumulator 1700: first electronic expansion valve
1800: battery chiller 1900: first coolant line
2000: 2nd coolant line 2010: 2nd coolant line
2020: 2-2 coolant line 2100: 2nd electromagnetic expansion valve
2200: PT sensor 2300: on/off valve part
2400: control unit 2500: solenoid expansion valve
RAD: radiator part RAD1: first radiator
RAD2 : 2nd radiator

Claims (12)

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 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 the 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 room by heat exchange with air supplied to the vehicle interior through the air conditioning case while introducing the refrigerant discharged from the outdoor condenser to vaporize the refrigerant;
An accumulator disposed adjacent to the compressor and connected to the evaporator by a fifth flow path, temporarily storing the refrigerant supplied from the evaporator, separating the incoming refrigerant into a liquid refrigerant and a gaseous refrigerant, and supplying the gaseous refrigerant to the compressor ;
a first electromagnetic expansion valve provided at a front end of the water-cooled condenser on the second flow path to depressurize the refrigerant that has passed through the indoor condenser;
a battery chiller provided on a first bypass line branched from the fourth flow path and connected to the fifth flow path;
a first coolant line for circulating coolant by connecting a first radiator of a radiator part disposed adjacent to the outdoor condenser and the water-cooled condenser;
a second coolant line including a 2-1 coolant line and a 2-2 coolant line for circulating coolant by connecting the second radiator of the radiator unit, the water-cooled condenser, and the battery enclosure to a vehicle battery;
a second electronic expansion valve provided on the first bypass line adjacent to the battery chiller and depressurizing the refrigerant that has passed through the outdoor condenser in the cooling battery cooperative mode;
a PT sensor provided on the first flow path adjacent to the indoor condenser and a sixth flow path connecting the compressor and the accumulator adjacent to the compressor, the PT sensor measuring pressures and temperatures of the first and sixth flow paths;
A first branch passage branched from the rear end of the compressor provided on the second passage and connected to the second passage, a point at which a second branch passage is branched from the third passage to be connected to the fifth passage, and an opening/closing valve unit provided in a second bypass line branched from a front end of the first electromagnetic expansion valve provided on the second flow path and connected to the fourth flow path; and
a control unit connected to the PT sensor 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 degree of the refrigerant supplied to the compressor in response to each mode;
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 the coolant circulating in the first coolant line is stored;
a first directional switching valve provided on the first coolant line 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.
3. The method according to claim 2,
The first reservoir tank is located at a rear end of the first radiator of the radiator unit, and the first direction switching valve is located at a place connecting the first reservoir tank and the first radiator.
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 battery of the vehicle;
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 on-off valve unit,
a first opening/closing valve provided on the first branch flow path and selectively opening and closing the first branch flow path connecting the first flow path and the second flow path;
a second opening/closing valve provided at a point where the second branch flow path is branched from the third flow path;
and a third opening/closing valve provided on a second bypass line connected to the fourth flow passage for branching from the second passage and selectively opening and closing the second bypass line;
A two-way valve is used for the first on-off valve and the third on-off valve, and a three-way valve is used for the second on-off valve.
7. The method of claim 6,
The control unit is
When the degree of superheat of the refrigerant supplied to the compressor is below the set temperature, the first on/off valve is opened,
The heating/cooling system for a vehicle, characterized in that the first on-off valve is closed when the superheat of the refrigerant supplied to the compressor is greater than or equal to a set temperature.
The method according to claim 1,
It is provided on the fourth flow path adjacent to the evaporator and further comprises a solenoid expansion valve for expanding the refrigerant supplied to the evaporator,
One end of the second bypass line is connected to the fourth flow path between the solenoid expansion valve and the evaporator.
9. The method of claim 8,
In the cooling mode, the first opening/closing valve of the opening/closing valve unit provided on the first branch flow path is closed, and the second opening/closing valve of the opening/closing valve unit provided at a point where the second branch path is provided in the third flow path is the outdoor is opened in the condenser direction, the second electromagnetic expansion valve provided on the first bypass line is closed, the third on/off valve of the on/off valve unit provided on the second bypass line is closed, and the The solenoid expansion valve provided in the expands,
The cooling water system for a vehicle, characterized in that the coolant circulates through the first coolant line and the second-first coolant line, and the first bypass coolant line of the first coolant line is sealed.
9. The method of claim 8,
In the heating mode, the first opening/closing valve of the opening/closing valve provided on the first branch flow path is selectively opened and closed according to the degree of superheat of the compressor, and is provided at a point where the second branch flow path is provided in the third flow path The second opening/closing valve of the opening/closing valve unit is opened in the direction of the accumulator connected to the fifth flow path, and a second electromagnetic expansion valve provided on the first bypass line and an opening/closing valve unit provided on the second bypass line. The third on-off valve, the solenoid expansion valve provided on the fourth flow path is closed,
The coolant is circulated to a first 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.
9. The method of claim 8,
In the heating and dehumidification mode, the first opening/closing valve of the opening/closing valve provided on the first branch flow path is selectively opened and closed according to the degree of superheat of the compressor, and is provided at a point where the second branch flow path is provided in the third flow path The second opening/closing valve of the on-off valve unit is opened in the direction of the accumulator connected to the fifth flow path, the second electromagnetic expansion valve provided on the first bypass line is closed, and the second opening/closing valve provided on the second bypass line is closed. The third opening/closing valve of the opening/closing valve part is opened, and the solenoid expansion valve provided on the fourth flow path is closed,
The coolant is circulated to a first 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.
9. The method of claim 8
In the cooling battery cooperative mode, the first opening/closing valve of the opening/closing valve unit provided on the first branch flow path is closed, and the second opening/closing valve of the opening/closing valve unit provided at a point where the second branch flow path is provided in the third flow path. is opened in the direction of the outdoor condenser, the second electromagnetic expansion valve provided on the first bypass line is opened, the third on/off valve of the on/off valve unit provided on the second bypass line is closed, The solenoid expansion valve provided on the 4 flow path expands,
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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