WO2014030884A1

WO2014030884A1 - Vehicle heat pump system

Info

Publication number: WO2014030884A1
Application number: PCT/KR2013/007395
Authority: WO
Inventors: 강성호; 김학규; 이상기; 최영호; 이정재
Original assignee: 한라비스테온공조 주식회사
Priority date: 2012-08-20
Filing date: 2013-08-16
Publication date: 2014-02-27

Abstract

The present invention relates to a vehicle heat pump system and, more particularly, to a vehicle heat pump system which includes: a three-way valve section connected to a refrigerant circulation line on the inlet side of an outdoor heat exchanger such that a circulating refrigerant selectively bypasses the outdoor heat exchanger; an on/off valve section connected to the inlet side of an evaporator bypass line such that the bypass line is on or off; a connection block connecting the three-way valve section and the on-off valve section with a refrigerant circulation line on the outlet side of the outdoor heat exchanger such that they communicate with each other; and a compound valve device into which an expansion means is built, said expansion means being connected to the inlet side of the three-way valve section in order to selectively expand the refrigerant discharged from an indoor heat exchanger. According to the present invention, the compound valve device controls the refrigerant such that all functions (modes) of the heat pump system can be performed, and the refrigerant circulation line (piping) has a simplified structure as multiple components and functions are integrated into the single compound valve device so as to render the heat pump system compact. Also, space can be ensured in a narrow vehicle engine compartment and both workability and fuel efficiency can be improved due to reduced weight.

Description

Automotive Heat Pump Systems

The present invention relates to a vehicle heat pump system, and more particularly, a three-way valve unit connected to an inlet refrigerant circulation line of an outdoor heat exchanger to selectively bypass the outdoor heat exchanger, and an evaporator bypass. An on-off valve portion connected to an inlet side of the line to turn the bypass line on and off; a connecting block connecting the three-way valve portion and the on-off valve portion to the refrigerant circulation line of the outlet side of the outdoor heat exchanger; The present invention relates to a heat pump system for a vehicle provided with a combined valve device integrally configured with expansion means connected to an inlet of a valve portion to selectively expand a refrigerant discharged from an indoor heat exchanger.

The vehicle air conditioner generally includes a cooling system for cooling the interior of a vehicle and a heating system for heating the interior of the vehicle. The cooling system is configured to heat the air passing through the outside of the evaporator at the evaporator side of the refrigerant cycle with the refrigerant flowing inside the evaporator to cool the vehicle, thereby cooling the vehicle interior, and the heating system is configured to heat the heater at the heater core side of the cooling water cycle. The air passing through the outside of the core is exchanged with the coolant flowing through the inside of the heater core to be converted into warmth, and configured to heat the vehicle interior.

On the other hand, in addition to the vehicle air conditioner, a heat pump system capable of selectively performing cooling and heating by changing the flow direction of the refrigerant using one refrigerant cycle is applied, for example, two heat exchangers. (I.e., an indoor heat exchanger installed in the air conditioning case for heat exchange with air blown into the vehicle interior, an outdoor heat exchanger for heat exchange from the outside of the air conditioning case), and a direction control valve for switching the flow direction of the refrigerant. do. Therefore, when the cooling mode is operated according to the flow direction of the refrigerant by the direction control valve, the indoor heat exchanger acts as a cooling heat exchanger, and when the heating mode is operated, the indoor heat exchanger acts as a heating heat exchanger. Will be

Various types have been proposed as such a vehicle heat pump system, and a representative example thereof is illustrated 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 the refrigerant discharged from the compressor 30, and a parallel structure. The first expansion valve 34 and the first opening and closing valve 36 for selectively passing the refrigerant passing through the high pressure side heat exchanger 32, and the first expansion valve 34 or the first opening and closing valve 36 The outdoor unit 48 for heat-exchanging the refrigerant having passed through the outside, the low pressure side heat exchanger 60 for evaporating the refrigerant passing through the outdoor unit 48, and the refrigerant passing through the low pressure side heat exchanger 60 are separated from the gas phase. Accumulator (62) for separating liquid phase refrigerant, internal heat exchanger (50) for exchanging refrigerant supplied to the low pressure side heat exchanger (60), refrigerant returned to the compressor (30), and the low pressure side heat exchanger Second expansion valve 56 for selectively expanding the refrigerant supplied to the machine 60 And a bypass line 58a installed in parallel with the second expansion valve 56 and the low pressure side heat exchanger 60, and connecting the outlet side of the outdoor unit 48 and the inlet side of the accumulator 62. And a second opening / closing valve 58 for opening and closing the bypass line 58a.

In FIG. 1, reference numeral 10 denotes an air conditioner case in which the high pressure side heat exchanger 32 and the low pressure side heat exchanger 60 are incorporated, and reference numeral 12 denotes a temperature control door for controlling a mixing amount of cold and warm air, and Each blower installed at the inlet 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 opening / closing valve 36 and the second expansion valve 56 are closed and the first expansion valve 34 is closed. ) And the second open / close valve 58 are opened. In addition, the temperature control door 12 operates as shown in FIG. Therefore, the refrigerant discharged from the compressor 30 is the high pressure side heat exchanger 32, the first expansion valve 34, the outdoor unit 48, the high pressure part 52 of the internal heat exchanger 50, and the second open / close valve 58. Then, the accumulator 62 and the low pressure part 54 of the internal heat exchanger 50 are sequentially returned to the compressor 30. That is, the high pressure side heat exchanger 32 serves as a heater, and the outdoor unit 48 serves as an evaporator.

When the air conditioner mode (cooling mode) is activated, the first opening / closing valve 36 and the second expansion valve 56 are opened, and the first expansion valve 34 and the second opening / closing valve 58 are closed. In addition, the temperature control door 12 is to close the passage of the high-pressure side heat exchanger (32). Accordingly, the refrigerant discharged from the compressor 30 may include the high pressure side heat exchanger 32, the first open / close valve 36, the outdoor unit 48, the high pressure unit 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 portion (54) of the internal heat exchanger (50) are returned to the compressor (30). 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 as in the heat pump mode. do.

The vehicle heat pump system is provided with not only a bypass line 58a for bypassing the circulating coolant, but also a branch line for branching a predetermined amount of the circulating coolant and supplying it to a specific site, although not shown in the drawing. On the line through which the coolant flows, a three-way valve (not shown) for switching the flow direction of the coolant, on / off

valves

36 and 58 for opening and closing the flow of the coolant, and

expansion valves

34 and 56 for expanding the coolant are provided.

However, in the conventional vehicle heat pump system, a pipe such as the bypass line 58a and the branch line, the three-way valve, the opening /

closing valves

36 and 58 and the

expansion valves

34 and 56 have a narrow engine room of the vehicle. As it is arranged in a compact manner, the structure of the refrigerant line (pipe) becomes complicated, and a separate engine (not shown) for connecting between the refrigerant lines (pipes) is required, and a narrow engine such that each valve is separately installed and installed. In the room, the heat pump system occupies a lot of space and the weight is excessive, there is a problem that the workability and fuel economy drop.

An object of the present invention for solving the above problems is a three-way valve portion connected to the inlet side refrigerant circulation line of the outdoor heat exchanger to selectively bypass the outdoor heat exchanger, and the inlet side of the evaporator bypass line. An on-off valve part connected to the on-off valve part to turn the bypass line on and off, a connection block connecting the three-way valve part and the on-off valve part to the outlet-side refrigerant circulation line of the outdoor heat exchanger, and the inlet side of the three-way valve part; By having a combined valve device integrally configured with expansion means connected to the expansion means for selectively expanding the refrigerant discharged from the indoor heat exchanger, it is possible to perform all the functions (modes) of the heat pump system through the refrigerant control of the combined valve device. In addition, the refrigerant circulation line (piping) is simplified because several parts and functions are integrated into one composite valve device. Possible to ensure compact mad possible and space as well as in a narrow engine room of the vehicle, and the pump system, there is provided a vehicle heat pump system capable of reducing fuel consumption and also improved workability on the weight.

The present invention for achieving the above object, which is connected to the refrigerant circulation line, respectively, comprises an indoor heat exchanger and an evaporator installed inside the air conditioning case, a compressor and an outdoor heat exchanger installed outside the air conditioning case. In a heat pump system for a vehicle in which a refrigerant is circulated sequentially in a compressor, an indoor heat exchanger, an outdoor heat exchanger, and an evaporator, a refrigerant that is installed in a specific section of the refrigerant circulation line and circulates along the refrigerant circulation line selects the evaporator. And a three-way valve portion connected to the bypass line for bypassing the air exchanger, the refrigerant circulation line connected to the inlet side of the outdoor heat exchanger to selectively bypass the outdoor heat exchanger, and a inlet side of the bypass line. An on-off valve portion connected to turn on and off a bypass line, and the three-way valve portion and on-off valve portion And a first composite valve device integrally configured with a connection block for connecting the outlet side refrigerant circulation line of the outdoor heat exchanger.

The present invention is connected to the refrigerant circulation line of the inlet side of the outdoor heat exchanger, and the three-way valve portion to selectively bypass the outdoor heat exchanger, and connected to the inlet side of the evaporator bypass line to turn on the bypass line. A connection block connecting the on-off valve unit to be turned off, the three-way valve unit, the on-off valve unit and the refrigerant circulation line of the outlet side of the outdoor heat exchanger in communication, and the inlet side of the three-way valve unit to be discharged from the indoor heat exchanger. By having a first composite valve unit integrally configured with expansion means for selectively expanding the refrigerant, it is possible to perform all the functions (modes) of the heat pump system through the refrigerant control of the first composite valve device as well as several Components and functions are integrated into one first composite valve device, simplifying the refrigerant circulation line (piping), making the heat pump system more compact. In addition to free up space in a narrow engine room and a vehicle neungham, and can be improved even by reducing the workability and fuel consumption on the weight.

In addition, the expansion valve unit having an expansion passage to expand the refrigerant supplied to the evaporator on the refrigerant circulation line inlet of the evaporator and the on-off valve unit for turning on and off the flow of the refrigerant passing through the expansion passage By installing a second composite valve device having a notch for always refrigerant flow on the expansion passage, all functions (modes) of the heat pump system are controlled through refrigerant control of the first composite valve device and the second composite valve device. Not only can it be carried out, but as several parts and functions are integrated into the first and second composite valve devices, the refrigerant circulation line (piping) is further simplified, making the heat pump system more compact, and in a compact vehicle engine room. Space can be further secured and the weight can be further reduced.

In addition, by replacing the three-way valve, which had to be installed at the branch point of the bypass line, with two on-off valves to perform a three-way valve function, by constructing a second composite valve device by integrating one on-off valve with an expansion valve This reduces the weight, component count and simplifies piping.

In addition, by directly forming the orifice of the first composite valve device on the valve member in the form of a shaft, it is easy to manufacture and can prevent a sudden change in the flow path to prevent the pressure drop.

1 is a block diagram showing a conventional vehicle heat pump system,

2 is a block diagram showing an air conditioner mode in a vehicle heat pump system according to the present invention;

3 is a perspective view showing a first composite valve device in FIG.

4 is a cross-sectional view showing an operating state of the three-way valve unit and expansion means in FIG.

5 is a cross-sectional view showing an operating state of the second composite valve device of FIG. 2;

6 is a block diagram showing a maximum heating mode of the heat pump mode in a vehicle heat pump system according to the present invention,

7 is a cross-sectional view showing an operating state of the three-way valve unit and expansion means in FIG.

8 is a cross-sectional view showing an operating state of the second composite valve device of FIG. 6;

9 is a block diagram showing a dehumidification mode of the heat pump mode in a vehicle heat pump system according to the present invention,

10 is a cross-sectional view showing an operating state of the three-way valve unit and expansion means in FIG.

11 is a cross-sectional view showing an operating state of the second composite valve device of FIG. 9;

12 is a block diagram showing a defrost mode of the heat pump mode in a vehicle heat pump system according to the present invention,

13 is a cross-sectional view showing an operating state of the three-way valve unit and expansion means in FIG.

14 is a cross-sectional view showing another embodiment of an orifice of a first composite valve device in a vehicle heat pump system according to the present invention;

15 is a configuration diagram showing another embodiment of a vehicle heat pump system according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The vehicle heat pump system according to the present invention includes a compressor 100, an indoor heat exchanger 110, a first composite valve device 200, an outdoor heat exchanger 130, and a refrigerant on a refrigerant circulation line (R). As the second composite valve device 300 and the evaporator 160 are connected to each other and the refrigerant is sequentially circulated, it is preferable to be applied to an electric vehicle or a hybrid vehicle.

In addition, a bypass line R1 for allowing a refrigerant flowing along the refrigerant circulation line R to bypass the second composite valve device 300 and the evaporator 160 in a specific section of the refrigerant circulation line R. ) Is installed.

At this time, the bypass line (R1) is installed in parallel to the refrigerant circulation line (R).

In addition, the heat pump system is provided with two expansion means, one expansion means 240 is installed on the refrigerant circulation line connecting the indoor heat exchanger 110 and the outdoor heat exchanger 130, the other one The expansion means of the expansion valve unit 310 is installed on the inlet refrigerant circulation line (R) of the evaporator 160, wherein it is installed between the indoor heat exchanger 110 and the outdoor heat exchanger (130) Expansion means 240 is integrated into the first composite valve device 200, the expansion valve unit 310 is installed on the inlet refrigerant circulation line (R) of the evaporator 160 is the second composite valve device ( 300).

Therefore, in the air conditioner mode, as shown in FIG. 2, the refrigerant discharged from the compressor 100 is transferred to the indoor heat exchanger 110, the outdoor heat exchanger 130, the first composite valve device 300, and the second composite valve device ( 300, the evaporator 160 and the compressor 100 are sequentially circulated, and in this case, the indoor heat exchanger 110 serves as a condenser (heater).

On the other hand, the outdoor heat exchanger 130 serves as a condenser such as the indoor heat exchanger (110).

In the heat pump mode (maximum heating mode), as shown in FIG. 6, the refrigerant discharged from the compressor 100 is transferred to the indoor heat exchanger 110, the first composite valve device 200, and the outdoor heat exchanger 130. In order to circulate the bypass line R1 and the compressor 100 sequentially, the indoor heat exchanger 110 serves as a condenser (heater) and the outdoor heat exchanger 130 serves as an evaporator. The refrigerant is not supplied to the evaporator 160.

In this way, in the air conditioner mode and the heat pump mode, the refrigerant circulation direction is the same, and the common section of the refrigerant circulation line R is shared, thereby preventing the congestion of the refrigerant generated when the refrigerant does not flow, and the entire refrigerant circulation line (R). ) Can also be simplified.

In the present invention, the heat pump mode is diversified as the maximum heating mode, dehumidification mode, and defrost mode. The dehumidification mode is performed when dehumidification is required in the vehicle interior, and the defrost mode is an outdoor heat exchanger. This is done when the implantation of.

Hereinafter, each component of the present invention will be described in detail.

The compressor 100 installed on the refrigerant circulation line R receives and compresses the refrigerant while driving by receiving power from an engine (an internal combustion engine or a motor), and discharges the refrigerant in a gas state of high temperature and high pressure.

The compressor 100 sucks and compresses the refrigerant discharged from the evaporator 160 side in the air conditioner mode and supplies the refrigerant to the indoor heat exchanger 110 side, and passes through the bypass line R1 in the heat pump mode. The refrigerant is sucked and compressed to be supplied to the indoor heat exchanger 110.

The indoor heat exchanger (110) is installed inside the air conditioning case (150) and is connected to the refrigerant circulation line (R) at the outlet of the compressor (100), and the air flowing in the air conditioning case (150) and The refrigerant discharged from the compressor 100 is exchanged.

In addition, the evaporator 160 is installed inside the air conditioning case 150 and is connected to the refrigerant circulation line R of the inlet side of the compressor 100, and the air flowing in the air conditioning case 150 and The refrigerant supplied to the compressor 100 is heat-exchanged.

The indoor heat exchanger 110 serves as a condenser (heater) in both the air conditioning mode and the heat pump mode,

The evaporator 160 serves as an evaporator in the air conditioner mode, and stops operating because the refrigerant is not supplied in the heating mode during the heat pump mode.

In addition, the indoor heat exchanger 110 and the evaporator 160 is installed in the air conditioning case 150 spaced apart from each other by a predetermined interval, the evaporator 160 from the upstream side of the air flow direction in the air conditioning case 150. ) And the indoor heat exchanger 110 are sequentially installed.

Therefore, in the air conditioner mode in which the evaporator 160 serves as the evaporator, as shown in FIG. 2, the low temperature low pressure refrigerant expanded through the expansion valve unit 310 of the second composite valve device 300 is the evaporator ( 160 is supplied to the air, and at this time, air flowing in the air-conditioning case 150 through a blower (not shown) is heat-exchanged with the low-temperature low-pressure refrigerant inside the evaporator 160 in the course of passing through the evaporator 160, cold air After the change, the liquid is discharged into the vehicle interior to cool the vehicle interior.

In the heat pump mode (maximum heating mode) in which the indoor heat exchanger 110 serves as a condenser (heater), as shown in FIG. 6, the high temperature and high pressure refrigerant discharged from the compressor 100 is connected to the indoor heat exchanger ( 110 is supplied to the air, in which the air flowing in the interior of the air conditioning case 150 through a blower (not shown) in the process of passing through the indoor heat exchanger 110, the refrigerant of the high temperature and high pressure inside the indoor heat exchanger 110 The heat exchange with the hot air is changed to the warm air, and then discharged into the vehicle interior to heat the interior of the vehicle.

On the other hand, the size of the evaporator 160, preferably larger than the size of the indoor heat exchanger (110).

In addition, an electric heating heater (not shown) may be further installed at the downstream side of the indoor heat exchanger 110 inside the air conditioning case 150 to improve heating performance.

In addition, between the evaporator 160 and the indoor heat exchanger 110 in the air conditioning case 150, the amount of air bypassing the indoor heat exchanger 110 and the amount of air passing through the air conditioning case 150 are adjusted. Temperature control door 151 is installed.

The temperature control door 151 adjusts the amount of air bypassing the indoor heat exchanger 110 and the amount of air passing through the indoor heat exchanger 110 to adjust the temperature of the air discharged from the air conditioning case 150. Can be adjusted accordingly.

In this case, when the air conditioner mode completely closes the front side passage of the indoor heat exchanger 110 through the temperature control door 151 as shown in FIG. 2, the cold air passing through the evaporator 160 is indoor heat exchanger 110. Since the bypass is supplied to the vehicle interior, the maximum cooling is performed, and in the heat pump mode (maximum heating mode) to bypass the indoor heat exchanger 110 through the temperature control door 151 as shown in FIG. 6. When the passage is completely closed, all the air passes through the indoor heat exchanger 110 serving as a condenser (heater) and is converted into warm air, and the warm air is supplied into the cabin, so that the maximum heating is performed.

On the other hand, by adjusting the position of the temperature control door 151, it is possible to appropriately adjust the temperature of the air discharged into the cabin, for example, in the air conditioning mode, by operating the temperature control door 151 to the indoor heat exchanger ( When both the passage bypassing and the passage passing through 110 are opened, some of the cold air passing through the evaporator 160 bypasses the indoor heat exchanger 110 and some passes through the indoor heat exchanger 110. It is changed to warm air. Thereafter, the cold air and the warm air are mixed to control the interior of the vehicle to an appropriate temperature, and the air passes through the evaporator 160 which serves as the evaporator, so that dehumidification is also performed.

In addition, in the present invention, the interior of the vehicle is dehumidified as air passes through the evaporator 160 in a mode in which some refrigerant is supplied to the evaporator 160 in the heat pump mode as well as the air conditioner mode.

As such, the present invention can operate the interior dehumidification function in the air-conditioning mode as well as the heat pump mode.

The outdoor heat exchanger 130 is installed outside the air conditioning case 150 and is connected to the refrigerant circulation line R to exchange heat between the refrigerant circulating through the refrigerant circulation line R and the outdoor air. Let's go.

Here, the outdoor heat exchanger 130 is installed on the front side of the vehicle engine room to heat exchange the refrigerant flowing inside with the outdoor air.

The outdoor heat exchanger 130 serves as the same condenser as the indoor heat exchanger 110 in the air conditioner mode, where the high temperature refrigerant flowing inside the outdoor heat exchanger 130 is condensed as it exchanges heat with outdoor air. do.

In addition, in the heat pump mode (maximum heating mode) it serves as an evaporator opposite to the indoor heat exchanger 110, in which the low-temperature refrigerant flowing inside the outdoor heat exchanger 130 exchanges heat with outdoor air. Will evaporate.

In addition, the present invention, the first multiple valve device 200 and the second composite valve device has a function of a plurality of valves that are conventionally installed on the refrigerant circulation line to control the refrigerant, and a plurality of connection blocks connecting the pipes. Only 300 can be done.

That is, through the refrigerant control of the first composite valve device 200 and the second composite valve device 300 can perform all the functions (modes) of the heat pump system, as well as several components and functions of each composite valve By integrating one device, the refrigerant circulation line (piping) can be simplified, which makes the heat pump system compact, and can secure a space in a narrow vehicle engine room, and can reduce work weight and improve fuel efficiency.

The first composite valve device 200 is connected to an inlet refrigerant circulation line R of the outdoor heat exchanger 130 so that a circulating refrigerant selectively bypasses the outdoor heat exchanger 130. An on-off valve unit 220 connected to the unit 210, an inlet side of the bypass line R1 to turn off the bypass line R1, and the three-way valve unit 210 and the on-off valve unit The connection block 230 which connects the 220 and the outlet side refrigerant circulation line R of the outdoor heat exchanger 130 to communicate with each other is formed integrally.

In addition, the first composite valve device 200 is configured to include not only the three-way valve unit 210, the on-off valve unit 220, and the connection block 230, but also the expansion means 240. In addition, the expansion means 240 is connected to the inlet side of the three-way valve 210 to selectively expand the refrigerant discharged from the indoor heat exchanger (110).

In other words, the first composite valve device 200 is configured as a single part by integrating the three-way valve part 210, the on-off valve part 220, the connection block 230, and the expansion means 240.

The expansion means 240 is installed to connect the inlet 211 side of the three-way valve unit 210 and the refrigerant circulation line (R) of the outlet side of the indoor heat exchanger 110 to turn on and off the refrigerant flow. An off valve 241 and an orifice 246 integrally provided in the on-off valve 241 to expand the refrigerant, and when the on-off valve 241 is opened, the refrigerant flows in an unexpanded state, In closing, the refrigerant expands and flows through the orifice 246.

The on-off valve 241, as shown in Figure 4, the flow path 242 is formed so that the refrigerant flows inside the on-off valve 241, the valve member 243 provided to open and close the flow path 242. It is composed of

At this time, the orifice 246 is formed on the valve member 243 of the on-off valve 241.

The valve member 243 may include a shaft 243a connected to a driving device provided on one side of the on-off valve 241 and a valve plate formed on the shaft 243a to open and close the flow path 242. 243b, the orifice 246 is formed through the valve plate 243b of the valve member 243.

Thus, the refrigerant flowing into the flow path 242 of the on-off valve 241 is expanded while passing through the orifice 246 formed in the valve plate 243b.

On the other hand, Figure 14 is another embodiment of the orifice 246, the valve member 243 shown in Figure 14, the hollow shaft (243a) is connected to the drive device installed on one side of the on-off valve (241) And a valve plate 243b formed on the shaft 243a to open and close the flow path 242, and the orifice 246 is formed inside and outside the hollow shaft 243a of the valve member 243. It is formed to penetrate through.

Thus, the refrigerant flowing into the flow path 242 of the on-off valve 241 flows into the orifice 246 formed in the hollow shaft 243a and expands while passing through the shaft 243a.

As such, by directly forming the orifice 246 on the valve member 243 in the form of a shaft, it is easy to manufacture and has an advantage of preventing a sudden drop in the flow path to prevent a pressure drop.

If the orifice 246 is formed on the body of the on-off valve 241, manufacturing is difficult.

In addition, a solenoid 244 that is a driving device for opening and closing the valve member 243 is installed at one side of the on / off valve 241, and the solenoid 244 is provided inside the on / off valve 241. An elastic member 245 is installed to move the valve member 243 to open the flow path 242 when the power is cut off.

As such, when the valve member 243 of the expansion means 240 opens the flow path 242, the refrigerant passing through the expansion means 240 passes in an unexpanded state. When the valve member 243 closes the flow path 242, the refrigerant passing through the expansion means 240 is expanded after passing through the orifice 246 on the valve member 243 and then passes.

In addition, the three-way valve part 210 is formed with one inlet 211 and two outlets 212a and 212b, and the one inlet 211 is an on-off valve 241 of the expansion means 240. ) And the two outlets 212a and 212b branch from the one inlet 211 and one outlet 212a is an inlet refrigerant of the outdoor heat exchanger 130. It is connected to the circulation line (R) and the other outlet 212b is to be connected to the connection block 230.

In addition, a valve member 213 for selectively opening the two outlets 212a and 212b is installed in the three-way valve part 210.

In addition, a solenoid 215 for operating the valve member 213 is installed at one side of the three-way valve part 210, and when the power-off of the solenoid 215 is cut off inside the three-way valve part 210. An elastic member 214 is installed to move the valve member 213 to close the outlet 212a of the outdoor heat exchanger 130.

Therefore, the refrigerant passing through the flow path 242 of the expansion means 240 flows to the outdoor heat exchanger 130 side or to the connection block 230 to bypass the outdoor heat exchanger 130. do.

In addition, the inside of the connection block 230, cross to connect the three-way valve 210 and the on-off valve 220 and the outlet refrigerant circulation line (R) of the outdoor heat exchanger 130 in communication. The four-way flow path 231 is formed.

Therefore, the refrigerant discharged from the outdoor heat exchanger 130 may flow to the second composite valve device 300 and the evaporator 160 through the connection block 230 or to the bypass line R1. It can also flow.

In addition, in the case of the refrigerant flowing directly into the connection block 230 by bypassing the outdoor heat exchanger 130 from the three-way valve unit 210, the second composite valve device 300 is provided through the connection block 230. ) And the evaporator 160 may flow to the bypass line (R1) side.

In this case, when the refrigerant is to bypass the outdoor heat exchanger 130 through the three-way valve unit 210, it is a case in which frosting occurs in the outdoor heat exchanger 130.

In addition, even if the refrigerant bypasses the outdoor heat exchanger 130, the heating performance can be improved by recovering the heat source through the water-cooled heat exchanger 181 or the evaporator 160.

On the other hand, the flow of the refrigerant flowing into the connection block 230 is determined through the control of the on-off valve unit 220 installed on the second composite valve device 300 or the bypass line (R1). . That is, the refrigerant may flow to any one side or at the same time through the control of the second composite valve device 300 and the on-off valve unit 220.

The on-off valve unit 220 is installed at the inlet side of the bypass line R1 to connect the connection block 230 and the bypass line R1 to selectively select the bypass line R1. It turns on and off.

The structure of the on-off valve part 220 is the same as that of the on-off valve 241 in which only the orifice 246 is omitted from the structure of the expansion means 240.

In the air conditioner mode, the first composite valve device 200, the on-off valve 241 of the expansion means 240 to open the flow path 242, the three-way valve unit 210 is the outdoor heat exchange The outlet (212a) side (130) is opened, the on-off valve unit 220 closes the bypass line (R1), the second composite valve device 300 is opened, the expansion The refrigerant passing through the on-off valve 241 of the means 240 in an unexpanded state is flowed to the outdoor heat exchanger 130 through the three-way valve portion 210, and passes through the outdoor heat exchanger 130. The refrigerant flows to the second composite valve device 300 and the evaporator 160 through the connection block 230.

In addition, in the heat pump mode, the on-off valve 241 of the expansion means 240 closes the flow path 242 to expand through the orifice 246, the three-way valve 210 is outdoors The outlet of the heat exchanger 130 is opened, the on-off valve unit 220 opens the bypass line R1, and the second composite valve device 300 is closed, thereby expanding the expansion means ( The refrigerant passing through the on-off valve 241 in the expanded state 240 is flowed to the outdoor heat exchanger 130 through the three-way valve 210, and the refrigerant passing through the outdoor heat exchanger 130 is It flows to the bypass line (R1) through the connection block 230.

The second composite valve device 300 is installed on the inlet refrigerant circulation line R of the evaporator 160 and expands the expansion passage 312a to expand the refrigerant supplied to the evaporator 160. The expansion valve unit 310 having a) and the on-off valve unit 320 for turning on and off the flow of the refrigerant passing through the expansion passage (312a) is formed integrally.

In addition, a notch portion 312c, which will be described later, is formed on an inner side surface of the expansion passage 312a so that a portion of the refrigerant may always flow.

That is, the expansion valve unit 310 and the on-off valve unit 320 having the expansion passage 312a and the notch portion 312c are integrally configured in one composite valve device 300, thereby expanding and expanding the valve function. By being able to perform both the off-valve function and the constant supply of a certain amount of refrigerant, the refrigerant circulation line (piping) (R) can be simplified to make the heat pump system compact and to secure a space in a narrow vehicle engine room. The weight can also be reduced.

In addition, the expansion valve unit 310 is connected to the refrigerant circulation line (R) and communicate flow paths through which the refrigerant passing through the expansion passage (312a) and the expansion passage (312a) for expanding the refrigerant therein. And a main body 311 having a 312b formed therein, and an opening / closing means 315 installed in the main body 311 to open and close the expansion passage 312a.

Here, a flow passage 312 is formed in the body 311 through which the refrigerant flowing along the refrigerant circulation line R passes through the refrigerant circulation line R, wherein the flow passage 312 is formed in the body 311. Some sections of the 312 may be configured as the expansion passage 312a having a reduced diameter of the flow passage 312, and some sections downstream of the expansion passage 312a may be configured as the communication passage 312b.

In addition, the opening and closing means 315 is disposed on one side (lower side) of the expansion passage (312a) and the ball 316 to operate to open and close the expansion passage (312a) and the inside of the main body 311 It is made to include a working shaft 317 that is installed to be lowered to operate the ball 316.

On the other hand, the lower portion of the main body 311 is provided with an elastic member 319 is in close contact with the ball 316 toward the expansion passage (312a).

In addition, a diesel passage 313 is formed in the main body 311 so that the refrigerant discharged from the evaporator 160 passes through the compressor 100 before being introduced into the compressor 100.

In addition, a diaphragm 318 which is displaced according to the temperature change of the refrigerant flowing in the diesel passage 313 is installed on the upper portion of the main body 311, the diaphragm 318 is the operating shaft 317 and Connected.

Therefore, the diaphragm 318 is displaced according to the temperature change of the refrigerant discharged from the evaporator 160 and flows through the diesel passage 313, and the operating shaft 317 moves up and down according to the displacement. The ball 316 is operated to open and close the expansion passage 312a.

In addition, the notch part may be provided on the inner surface of the expansion passage 312a so that the refrigerant may partially flow through the expansion passage 312a even when the expansion passage 312a is closed by the opening / closing means 315. 312c is formed.

That is, by forming the notch portion 312c of the groove shape on the seating surface of the expansion passage 312a on which the ball 316 is seated, the furnace 316 closes the expansion passage 312a even if the ball 316 is closed. A constant amount of refrigerant is always passed through the expansion passage 312a through the teeth 312c.

In addition, the on / off valve part 320 of the second multiple valve device 300 may include a driving device 321 coupled to one side of the main body 311 and a reciprocating motion of the driving device 321. It is provided with an operating valve 322 for opening and closing the communication flow path (312b).

The drive device 321 is preferably a solenoid for linearly reciprocating the operation valve 322.

Therefore, when power is applied to the solenoid, the operation valve 322 moves to close the communication passage 312b in the main body 311, and when the power is cut off from the solenoid, the elastic valve is installed on the main body 311 side. The communication channel 312b is opened by the member 323 moving the operation valve 322 to an initial position.

In the second combined valve device 300, the expansion valve part 310 opens the expansion passage 312a in the air conditioner mode as shown in FIG. 5, and the on / off valve portion 320 communicates with the communication passage ( By opening 312b), the refrigerant discharged from the outdoor heat exchanger 130 is expanded in the process of passing through the expansion passage 312a after passing through the connection block 230, and then the communication passage 312b is opened. Passed through and supplied to the evaporator 160,

In the heat pump mode (maximum heating mode), as shown in FIG. 8, the expansion valve 310 closes the expansion passage 312a, and the on / off valve portion 320 closes the communication passage 312b. By doing so, the refrigerant discharged from the outdoor heat exchanger 130 flows to the bypass line R1 through the connection block 230 and the on-off valve unit 220, and the second composite valve device 300. And the evaporator 160 is bypassed.

In the dehumidification mode, the expansion valve unit 310 closes the expansion passage 312a, and the on / off valve portion 320 opens the communication passage 312b. Even though the ball 316 of the 310 closes the expansion passage 312a, a predetermined amount of refrigerant passes through the notch 312c, thereby being discharged from the outdoor heat exchanger 130 and flowing into the connection block 230. Some of the refrigerant may flow toward the compressor 100 through the on / off valve unit 220 and the bypass line R1, and some of the refrigerant may flow along the notch part 312c and the refrigerant circulation line R. After passing through the communication passage 312b is supplied to the evaporator 160 side and then flows to the compressor 100 side to dehumidify the interior of the vehicle.

In addition, the coolant circulating on the bypass line R1 and the vehicle electric component 400 on the bypass line R1 installed to bypass the second multiple valve device 300 and the evaporator 160. The water-cooled heat exchanger 181 is installed to exchange heat.

The water-cooled heat exchanger 181 is a refrigerant heat exchanger 181a through which the refrigerant flowing through the bypass line R1 flows to supply the waste heat of the vehicle electrical component 400 to the refrigerant flowing through the bypass line R1. ), And a coolant heat exchanger 181b provided with one side of the refrigerant heat exchanger 181a through which coolant flows to circulate the vehicle electronics 400.

Therefore, the heating performance can be improved by recovering the heat source from the waste heat of the vehicle electrical appliance 400 in the heat pump mode.

On the other hand, the vehicle electronics 400 is typically a motor, an inverter and the like.

The accumulator 170 is installed on the inlet refrigerant circulation line R of the compressor 100.

The accumulator 170 separates the liquid refrigerant and the gaseous refrigerant from the refrigerant supplied to the compressor 100 so that only the gaseous refrigerant may be supplied to the compressor 100.

15 is another embodiment of a vehicle heat pump system according to the present invention, and only a portion different from the above-described heat pump system will be described.

In the embodiment of Figure 15, the second composite valve device 300 is used as it is, the first composite valve device 200 is omitted. As a result, the function of one of the first composite valve devices 200 is separated into a plurality of parts, that is, the expansion means 120, the first three-way valve 191, and the second three-way valve 192.

In other words, only the function of one of the first composite valve devices 200 is separated into several components, and the other refrigerant flow control is performed in the same manner. Of course, although the number of parts is larger than the case of using the first composite valve device 200, only the second composite valve device 300 can obtain the effect described later.

In addition, by separating into a plurality of components as described above, in addition to the bypass line (R1) for bypassing the second composite valve device 300 and the evaporator 160 on the refrigerant circulation line (R) the outdoor heat exchanger ( An auxiliary bypass line (R2) for bypassing 130 is installed, and an expansion line (R3) is installed in parallel on the refrigerant purifying line (R) connecting the indoor heat exchanger (110) and the outdoor heat exchanger (130). do.

The first three-way valve 191 is installed at the branch point of the auxiliary bypass line R2, and the second three-way valve 192 is installed at the branch point of the expansion line R3.

At this time, the three-way valve is not installed at the branch point of the bypass line (R1), two on-off valves are installed instead, one on-off valve (195) is installed on the bypass line (R1) , The other on-off valve 320 is integrated into the second composite valve device 300 installed on the inlet refrigerant circulation line (R) of the evaporator 160.

That is, the three-way valve has a disadvantage of large size and heavy weight, it is separated into two on-off valves, but when using the two on-off valves there is another disadvantage that increases the number of parts and complicated pipe connection,

In the present invention, to solve all these disadvantages, by replacing the three-way valve that had to be installed at the branch point of the bypass line (R1) with two on-off valve to perform a three-way valve function, one of the on-off valve ( 320 is integrated with the expansion valve 310 installed on the inlet side of the evaporator 160.

That is, it is the second composite valve device 300 that integrates an on-off valve (on-off valve portion) and an expansion valve (expansion valve portion) installed on the refrigerant circulation line R facing the evaporator 160. will be.

In this way, the three-way valve, which had to be installed at the branch point of the bypass line R1, is replaced with two on-off valves, and one on-off valve 320 is integrated with the expansion valve 310 to form a second composite valve. The weight, component count reduction, and pipe simplification effect of the device 300 are equally applicable to the heat pump system shown in FIGS. 2 to 13.

In addition, the first three-way valve 191 installed at the branch point of the auxiliary bypass line R2 in the refrigerant circulation line R has a refrigerant in the outdoor heat exchanger 130 depending on whether an outdoor heat exchanger 130 is formed. Or the flow direction of the refrigerant to flow to the auxiliary bypass line (R2).

That is, in the case of the occurrence of the frost in the outdoor heat exchanger 130, the refrigerant bypasses the outdoor heat exchanger 130 through the control of the first three-way valve 191 flows to the auxiliary bypass line (R2) side. Is controlled.

As such, even if the refrigerant bypasses the outdoor heat exchanger 130, some of the refrigerant that bypasses the outdoor heat exchanger 130 recovers waste heat of the vehicle electronics 400 through the water-cooled heat exchanger 181. Some of the refrigerant is supplied to the evaporator 160 that exchanges heat with the indoor air through the second composite valve device 300 to recover the heat source of the indoor air, thereby improving heating performance.

The expansion means 120 installed in the expansion line R3 selectively expands the refrigerant supplied to the outdoor heat exchanger 130 according to the air conditioner mode or the heat pump mode.

The expansion means 120, it is preferable to use an orifice.

Therefore, in the air conditioner mode, the refrigerant discharged from the compressor 100 and passed through the indoor heat exchanger 110 bypasses the expansion means 120 by the second three-way valve 192 to the outdoor heat exchanger. 130, and

In the heat pump mode (maximum heating mode), the refrigerant discharged from the compressor 100 and passed through the indoor heat exchanger 110 passes through the expansion means 120 by the second three-way valve 192. After being expanded while being supplied to the outdoor heat exchanger (130).

On the other hand, Figure 15 shows only the maximum heating mode of the heat pump mode as an example, in addition to that can perform a variety of modes as shown in Figs.

Hereinafter, the operation of the vehicle heat pump system according to the present invention will be described.

end. Air conditioner mode (cooling mode)

In the air conditioner mode (cooling mode), as shown in FIGS. 2 to 5, the bypass line R1 is closed through the on / off valve part 220 and the expansion means of the first composite valve device 200 is closed. The 240 opens the flow path 242, and the three-way valve 210 opens the outlet 212a of the outdoor heat exchanger 130.

In addition, the expansion passage 312a and the communication passage 312b of the second composite valve device 300 are opened.

On the other hand, during maximum cooling, the temperature control door 151 in the air conditioning case 150 operates to close a passage through the indoor heat exchanger 110 (condenser), and is blown into the air conditioning case 150 by a blower. After the air is cooled while passing through the evaporator 160, the indoor heat exchanger 110 is bypassed and supplied to the interior of the vehicle, thereby cooling the interior of the vehicle.

Continuing to explain the refrigerant circulation process,

The high temperature and high pressure gaseous refrigerant discharged after being compressed by the compressor 100 is supplied to the indoor heat exchanger 110 (condenser role) installed in the air conditioning case 150.

The refrigerant supplied to the indoor heat exchanger 110, as shown in Figure 2, because the temperature control door 151 closes the passage of the indoor heat exchanger 110 side immediately without heat exchange with the air, the first composite valve device 200 After passing through the expansion means 240 and the three-way valve portion 210 of the) is to flow to the outdoor heat exchanger (130) (condenser role).

The refrigerant flowing into the outdoor heat exchanger 130 is condensed as it exchanges heat with outdoor air, thereby converting the gaseous refrigerant into a liquid refrigerant.

On the other hand, both the indoor heat exchanger 110 and the outdoor heat exchanger 130 is condenser dynamics, but the refrigerant is mainly condensed in the outdoor heat exchanger 130 that exchanges heat with outdoor air.

Subsequently, the refrigerant having passed through the outdoor heat exchanger 130 is expanded under reduced pressure in the course of passing through the expansion passage 312a of the second composite valve device 300 via the connection block 230, thereby at low temperature and low pressure. After the liquid refrigerant of the, it is introduced into the evaporator 160 via the communication flow path (312b) opened by the on-off valve unit (320).

The refrigerant introduced into the evaporator 160 exchanges heat with the air blown into the air conditioning case 150 through a blower to evaporate and simultaneously cools the air by the endothermic action of the evaporative latent heat of the refrigerant. It is supplied to the vehicle interior and cooled.

Thereafter, the refrigerant discharged from the evaporator 160 is recycled to the cycle as described above while flowing into the compressor 100.

I. Maximum heating mode of heat pump mode

In the maximum heating mode of the heat pump mode, as shown in FIGS. 6 to 8, the bypass line R1 is opened through the on-off valve unit 220 and the expansion means of the first composite valve device 200 is provided. 240 closes the flow path 242 to perform an expansion function through the orifice 246, and the three-way valve part 210 opens the outlet 212a of the outdoor heat exchanger 130 side.

In addition, the expansion passage 312a and the communication passage 312b of the second composite valve device 300 are closed, and the refrigerant flowing up to the connection block 230 passes through the second composite valve device 300 and the evaporator ( 160) does not flow to the side.

In the heating mode, the temperature control door 151 in the air conditioning case 150 operates to close the passage that bypasses the indoor heat exchanger 110 (the condenser role), and is blown into the air conditioning case 150 by the blower. After the blown air passes through the evaporator 160 (operation stop) and passes through the indoor heat exchanger 110, the air is changed into warm air and supplied into the vehicle interior, thereby heating the interior of the vehicle interior.

Continuing to explain the refrigerant circulation process,

The high temperature and high pressure gaseous refrigerant discharged after being compressed by the compressor 100 is introduced into an indoor heat exchanger 110 (condenser role) installed in the air conditioning case 150.

The high temperature and high pressure gaseous refrigerant introduced into the indoor heat exchanger 110 is condensed while exchanging heat with air blown into the air conditioning case 150 through a blower, and the air passing through the indoor heat exchanger 110 is After the warm air, it is supplied to the interior of the car to heat the cabin.

Subsequently, the refrigerant discharged from the indoor heat exchanger 110 is expanded under reduced pressure in the process of passing through the orifice 246 in the expansion means 240 of the first composite valve device 200 to become a low temperature low pressure liquid refrigerant. After that, the three-way valve 210 is supplied to the outdoor heat exchanger 130 (evaporator role).

The refrigerant supplied to the outdoor heat exchanger 130 is evaporated while exchanging heat with outdoor air, and then flows to the bypass line R1 through the connection block 230 and the on-off valve unit 220. The refrigerant flowing through the bypass line R1 exchanges heat with the cooling water passing through the cooling water heat exchanger 181b in the process of passing through the refrigerant heat exchanger 181a of the water-cooled heat exchanger 181, and thus the vehicle electrical appliance 400 After recovering the waste heat of the, it is introduced into the compressor 100 to recycle the cycle as described above.

All. Dehumidification mode of heat pump mode

The dehumidification mode of the heat pump mode, as shown in Figure 9 to 11, is operated when the indoor dehumidification is required during operation in the maximum heating mode of FIG.

Therefore, only parts different from the maximum heating mode of FIG. 6 will be described.

In the dehumidification mode, the expansion passage 312a of the second composite valve device 300 is closed in the maximum heating mode, and the communication passage 312b is opened.

At this time, even if the ball 316 of the expansion valve 310 is in close contact with the expansion passage (312a) side to close the expansion passage (312a), the notch portion (312c) formed on the inner surface of the expansion passage (312a) Through the predetermined amount of refrigerant may always pass through the expansion passage (312a).

Due to this, the refrigerant introduced into the connection block 230 of the first composite valve device 200 is bifurcated into two parts, and some flow to the second composite valve device 300 and the evaporator 160, and some It flows to the pass line R1 side.

In the dehumidification mode, the temperature control door 151 in the air conditioning case 150 operates to close the passage that bypasses the indoor heat exchanger 110 (the condenser role), and the blower enters the air conditioning case 150 by the blower. After the blown air is cooled and dehumidified in the course of passing through the evaporator 160, the air is converted into warm air while being passed through the indoor heat exchanger 110 to be supplied into the vehicle interior, thereby dehumidifying the interior of the vehicle interior.

At this time, since the amount of refrigerant supplied to the evaporator 160 is small, the air cooling performance is also low, thereby minimizing the change in room temperature, and dehumidification of air passing through the evaporator 160 is performed smoothly.

Continuing to explain the refrigerant circulation process,

Refrigerant passing through the compressor 100, the indoor heat exchanger 110, the orifice 246 and the three-way valve unit 210, the outdoor heat exchanger 130 in the expansion means 240 of the first composite valve device 200. Is introduced into the connection block 230 and some of the refrigerant introduced into the connection block 230 passes through the refrigerant heat exchange part 181a of the water-cooled heat exchanger 181 of the bypass line R1. Heat exchange with the coolant passing through the coolant heat exchanger 181b to evaporate while recovering the waste heat of the vehicle electrical appliance 400, and a part of the coolant is notched in the expansion passage 312a of the second composite valve device 300. After passing through 312c) it is supplied to the evaporator 160 via the communication flow path 312b to evaporate in the process of heat exchange with the air flowing in the air conditioning case 150.

In the process, dehumidification of air passing through the evaporator 160 is performed, and the dehumidified air passing through the evaporator 160 is changed into warm air while passing through the indoor heat exchanger 110 (condenser) and then the vehicle. It is supplied to the room and heated by dehumidification.

Thereafter, the refrigerant having passed through the water-cooled heat exchanger 181 and the evaporator 160, respectively, is joined, and then flows into the compressor 100 to recycle the cycle as described above.

la. Defrost mode in heat pump mode

Defrost mode of the heat pump mode, as shown in Figure 12 and 13, is activated when defrosting occurs in the outdoor heat exchanger 130 is required to operate.

In the defrost mode, when the outdoor heat exchanger 130 needs to be defrosted while operating in the maximum heating mode of FIG. 6, the refrigerant is defrosted by bypassing the outdoor heat exchanger 130. Of course, it is also possible to switch to the air conditioning mode for defrosting.

In addition, in the dehumidification mode, as shown in FIG. 13, the expansion means 240 of the first composite valve device 200 closes the flow path 242 to perform an expansion function through the orifice 246 and the three-way valve part. 210 opens the outlet 212b of the connection block 230 so that the refrigerant bypasses the outdoor heat exchanger 130.

On the other hand, the second composite valve device 300, as shown in Figure 11, the expansion passage 312a is closed, the communication passage 312b is open, so that a predetermined amount of refrigerant is notched in the expansion passage (312a) ( It is possible to flow through the expansion passage 312a and the communication passage 312b through 312c.

In the defrost mode, the temperature control door 151 in the air conditioning case 150 operates to close a passage that bypasses the indoor heat exchanger 110 (the condenser role), and is blown into the air conditioning case 150 by a blower. After the blown air is cooled in the course of passing through the evaporator 160, the air is converted into warm air while being passed through the indoor heat exchanger 110 and supplied to the interior of the vehicle, thereby heating the interior of the vehicle interior.

Continuing to explain the refrigerant circulation process,

Subsequently, the refrigerant discharged from the indoor heat exchanger 110 is expanded under reduced pressure in the process of passing through the orifice 246 in the expansion means 240 of the first composite valve device 200 to become a low temperature low pressure liquid refrigerant. Thereafter, the three-way valve 210 flows toward the connection block 230 to bypass the outdoor heat exchanger 130.

Some of the refrigerant introduced into the connection block 230 passes through the coolant heat exchanger 181b while passing through the refrigerant heat exchanger 181a of the water-cooled heat exchanger 181 of the bypass line R1. Heat exchange with the evaporation while recovering the waste heat of the vehicle electrical equipment 400, some of the refrigerant passes through the notch portion (312c) of the expansion passage (312a) of the second composite valve device 300 and the communication passage (312b) Is supplied to the evaporator 160 through the evaporation in the process of heat exchange with the air flowing in the air conditioning case 150.

Claims

Is connected to each of the refrigerant circulation line (R), the indoor heat exchanger 110 and the evaporator 160 installed inside the air conditioning case 150, and the compressor 100 installed outside the air conditioning case 150 And an outdoor heat exchanger (130), in which a refrigerant sequentially circulates through the compressor (100), the indoor heat exchanger (110), the outdoor heat exchanger (130), and the evaporator (160),

A bypass line (R1) installed in a specific section of the refrigerant circulation line (R) to allow the refrigerant circulating along the refrigerant circulation line (R) to selectively bypass the evaporator (160);

A three-way valve unit 210 connected to an inlet refrigerant circulation line R of the outdoor heat exchanger 130 to selectively bypass the outdoor heat exchanger 130, and the bypass line; An on-off valve unit 220 connected to an inlet side of R1 to turn on and off the bypass line R1, the three-way valve unit 210, an on-off valve unit 220, and the outdoor heat exchanger 130. A first composite valve device (200) integrally configured with a connection block (230) for connecting the outlet refrigerant circulation line (R) of the vehicle is characterized in that it comprises a.
The method of claim 1,

The first composite valve device 200 is integrally provided with expansion means 240 connected to the inlet side of the three-way valve unit 210 to selectively expand the refrigerant discharged from the indoor heat exchanger 110. Vehicle heat pump system, characterized in that.
The method of claim 2,

The expansion means 240 is installed to connect the inlet side of the three-way valve unit 210 and the outlet side refrigerant circulation line (R) of the indoor heat exchanger (110) on-off valve for turning on and off the refrigerant flow ( 241 and an orifice 246 integrally provided at the on-off valve 241 to expand the refrigerant,

When the on-off valve (241) is opened, the refrigerant flows in an unexpanded state, and when closed, the vehicle heat pump system characterized in that the refrigerant is expanded through the orifice (246) to flow.
The method of claim 3, wherein

The on-off valve 241 is composed of a flow path 242 is formed so that the refrigerant flows inside the on-off valve 241, a valve member 243 is installed to open and close the flow path 242,

The orifice (246) is formed on the valve member (243) characterized in that the vehicle heat pump system.
The method of claim 4, wherein

The valve member 243 includes a shaft 243a connected to a driving device provided on one side of the on-off valve 241 and a valve plate 243b formed on the shaft 243a to open and close the flow path 242. ),

The orifice 246 is formed through the valve plate (243b) of the valve member (243), characterized in that the vehicle heat pump system.
The method of claim 4, wherein

The valve member 243 includes a hollow shaft 243a connected to a driving device provided on one side of the on-off valve 241 and a valve plate formed on the shaft 243a to open and close the flow path 242. 243b,

The orifice (246) is formed in the hollow shaft (243a) of the valve member (243), the heat pump system for a vehicle, characterized in that formed to pass through.
The method of claim 2,

The three-way valve part 210 is branched from one inlet 211 and the one inlet 211 connected to the expansion means 240, and the refrigerant circulation line of the inlet side of the outdoor heat exchanger 130 (R) and two outlets 212a and 212b connected to the connection block 230, respectively, and valve members 213 for selectively opening and closing the two outlets 212a and 212b. Automotive heat pump system.
The method of claim 1,

Inside the connection block 230, the four-way flow path to connect the three-way valve 210 and the on-off valve 220 and the outlet refrigerant circulation line (R) of the outdoor heat exchanger 130 in communication ( 231, characterized in that the vehicle heat pump system.
The method of claim 1,

On the inlet coolant circulation line R of the evaporator 160, an expansion valve unit 310 having an expansion passage 312a to expand the refrigerant supplied to the evaporator 160, and the expansion passage 312a. 2. The vehicle heat pump system, characterized in that a second composite valve device (300) formed by integrally configuring an on / off valve unit (320) for turning on and off the flow of the refrigerant passing through is installed.
The method of claim 9,

The expansion valve part 310 is connected to the refrigerant circulation line R and communicates with the expansion passage 312a through which the refrigerant passes through the expansion passage 312a and the expansion passage 312a to expand the refrigerant therein. The main body 311 is formed,

Vehicle heat pump system, characterized in that made of the opening and closing means (315) for opening and closing the expansion passage (312a) installed in the main body (311).
The method of claim 10,

On the inner side surface of the expansion passage 312a, even when the expansion passage 312a is closed by the opening and closing means 315, the notch part 312c allows the refrigerant to partially flow through the expansion passage 312a. Vehicle heat pump system, characterized in that formed.
The method of claim 10,

The opening and closing means 315 is disposed on one side of the expansion passage (312a) and the ball 316 to operate to open and close the expansion passage (312a) and is installed to be able to move up and down inside the main body (311) Vehicle shaft comprising a working shaft (317) for operating the ball (316).
The method of claim 10,

The on-off valve part 320 is installed to the driving device 321 coupled to one side of the main body 311 and the driving device 321 so as to reciprocate to open and close the communication passage 312b. Vehicle heat pump system, characterized in that consisting of the operating valve (322).
The method of claim 13,

The drive device (321) is a vehicle heat pump system, characterized in that the solenoid to linearly reciprocate the operation valve (322).
The method of claim 1,

On the bypass line R1, a refrigerant heat exchanger through which refrigerant flowing through the bypass line R1 flows to exchange heat between the refrigerant flowing through the bypass line R1 and the waste heat of the vehicle electrical equipment 400. 181a and a water-cooled heat exchanger 181 including a coolant heat exchanger 181b provided at one side of the refrigerant heat exchanger 181a and having a coolant circulating in the vehicle electrical component 400 flows therethrough. Automotive heat pump system.