KR101474808B1 - Heat pump system for vehicle - Google Patents

Abstract

The present invention relates to a heat pump system for a vehicle, and more particularly, to a heat pump system for a vehicle, and more particularly, to a heat pump system for a vehicle, which comprises an accumulator integrated with a receiver at a branch point of a first bypass line for bypassing an evaporator and a first expansion means on a refrigerant circulation line, The heat pump system functions as a receiver for discharging the liquid refrigerant and serves as an accumulator for discharging the gaseous refrigerant in the heat pump mode. By integrating the functions of the receiver and the accumulator, which have been separately constructed in the heat pump system, And two outlet pipes are formed in the accumulator integrated with the receiver to control the flow direction of the refrigerant according to the air condition mode or the heat pump mode to perform various modes in the heat pump system A vehicle capable of improving the heating performance as well as being able to To a heat pump system.

Description

[0001] Heat pump system for vehicle [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle heat pump system, and more particularly to a vehicular heat pump system, and more particularly to a heat pump system for a vehicle, The present invention relates to a heat pump system for a vehicle which is provided with an accumulator integrated with a receiver at a branch point and serves as a receiver for discharging liquid refrigerant in an air conditioning mode and an accumulator for discharging gaseous refrigerant in a heat pump mode.

Background Art [0002] A vehicle air conditioner generally includes a cooling system for cooling the interior of a vehicle and a heating system for heating the interior of the vehicle. Wherein the cooling system is configured to cool air in the vehicle interior by exchanging air passing through the outside of the evaporator at the evaporator side of the refrigerant cycle with the refrigerant flowing in the evaporator to convert into cool air, The air passing through the outside of the core is exchanged with the cooling water flowing in the inside of the heater core to warm the inside of the vehicle.

A heat pump system which can selectively perform cooling and heating by switching the flow direction of refrigerant by using one refrigerant cycle is different from the above vehicle air conditioning system. For example, two heat exchangers (That is, an indoor heat exchanger installed inside the air conditioner case for exchanging heat with air blown into the vehicle interior, and an outdoor heat exchanger for exchanging heat outside the air conditioner 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 functions as a cooling heat exchanger. When the heating mode is activated, the indoor heat exchanger functions as a heating heat exchanger .

Various kinds of such a heat pump system for vehicles have been proposed, and a representative example thereof is 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, A first expansion valve 34 and a first bypass valve 36 for selectively passing the refrigerant passed through the high pressure side heat exchanger 32 and a second expansion valve 34 and a first bypass valve 36 Pressure side heat exchanger (60) for evaporating the refrigerant that has passed through the outdoor unit (48), and a low-pressure side heat exchanger (50) for exchanging heat between an accumulator (62) for separating the refrigerant into a gas phase and a liquid refrigerant, a refrigerant supplied to the low pressure side heat exchanger (60), and a refrigerant returning to the compressor (30) Side heat exchanger (60), a second expansion A valve 56 and a second bypass valve 58 disposed in a row with the second expansion valve 56 for selectively connecting the outlet side of the outdoor unit 48 to the inlet side of the accumulator 62, .

A receiver (49) is installed at the outlet of the outdoor unit (48), and an accumulator (55) is installed at the inlet side of the compressor (30).

Here, the receiver (49) separates the gaseous refrigerant from the refrigerant discharged from the outdoor unit (48) and discharges only the liquid refrigerant. The main function is to store the liquid refrigerant, Maintenance, moisture removal in the system, desiccant and filter mounting space.

The accumulator 55 separates the liquid refrigerant from the refrigerant flowing into the accumulator 55 and discharges only the gaseous refrigerant to the compressor 30. The main function of the accumulator 55 is to separate the liquid refrigerant from the refrigerant flowing into the compressor 30, Refrigerant storage.

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

The first bypass valve 36 and the second expansion valve 56 are closed and the first expansion valve (heating mode) 34 and the second bypass valve 58 are opened. In addition, the temperature control door 12 operates as shown in Fig. Therefore, the refrigerant discharged from the compressor 30 flows through the high pressure side heat exchanger 32, the first expansion valve 34, the outdoor unit 48, the high pressure portion 52 of the internal heat exchanger 50, the second bypass valve 58 The accumulator 62 and the low pressure section 54 of the internal heat exchanger 50 in this order. That is, the high-pressure side heat exchanger 32 serves as a radiator, and the outdoor unit 48 serves as an evaporator.

When the air conditioning mode (cooling mode) is activated, the first bypass valve 36 and the second expansion valve 56 are opened, and the first expansion valve 34 and the second bypass valve 58 are closed do. Further, the temperature control door 12 closes the high-pressure side heat exchanger 32 passage. Therefore, the refrigerant discharged from the compressor 30 flows through the high-pressure side heat exchanger 32, the first bypass valve 36, the outdoor unit 48, the high-pressure portion 52 of the internal heat exchanger 50, 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 in this order. That is, the low-pressure side heat exchanger 60 serves as an evaporator, and the high-pressure side heat exchanger 32 closed by the temperature control door 12 serves as a radiator as in the heat pump mode do.

However, in the conventional heat pump system, the receiver 49 is provided at the outlet of the outdoor unit 48, and the accumulator 55 is separately provided at the inlet of the compressor 30, There is a problem that the cost is increased.

Particularly, in the heat pump system, since the outdoor unit 48 functions as an evaporator in the heat pump mode, the receiver 49 installed at the outlet of the outdoor unit 48 is not necessary,

Further, the desiccant that performs the water removing function in the accumulator 55 has a problem that it is not necessary because the receiver 49 performs its function.

In order to solve the above-mentioned problems, an object of the present invention is to provide a liquid accumulator integrated accumulator at a branch point of a first bypass line for bypassing an evaporator and a first expansion means on a refrigerant circulation line, In the heat pump mode, the function of the accumulator that discharges the gaseous refrigerant is performed, thereby reducing the number of components by integrating the functions of the receiver and the accumulator, which are separately formed in the heat pump system, In addition, it is possible to perform various modes in the heat pump system by controlling the flow direction of the refrigerant according to the air conditioner mode or the heat pump mode by forming two outlet pipes in the accumulator integrated with the receiver, Vehicle heat pump system that can improve heating performance To provide.

According to an aspect of the present invention, there is provided a refrigerator including a compressor installed on a refrigerant circulation line for compressing and discharging a refrigerant, and a refrigerant circulation line connected to an outlet side refrigerant circulation line of the compressor, And an indoor heat exchanger installed inside the air conditioning case and connected to an inlet side refrigerant circulation line of the compressor, for circulating the air flowing in the air conditioning case, An outdoor heat exchanger installed outside the air conditioning case for exchanging heat between outdoor air and the refrigerant circulating through the refrigerant circulation line; and an outdoor heat exchanger installed on the inlet side refrigerant circulation line of the evaporator, A first expansion means for expanding the refrigerant supplied to the evaporator, and a second expansion means for expanding the refrigerant supplied to the inlet side A first bypass line connected to the refrigerant circulation line and an outlet side refrigerant circulation line of the evaporator so that the circulating refrigerant bypasses the first expansion means and the evaporator, A first direction switching valve installed at a branch point of the line for switching the refrigerant flow direction so that the refrigerant passing through the outdoor heat exchanger flows to the first bypass line or the first expansion means according to the air conditioner mode or the heat pump mode, A heat supply unit installed on the first bypass line and supplying heat to the refrigerant flowing along the first bypass line, and a heat supply unit provided on the inlet side refrigerant circulation line of the outdoor heat exchanger, And a second expansion means for selectively expanding the refrigerant supplied to the outdoor heat exchanger according to the mode.

The present invention provides a receiver-integrated accumulator at a branch point of a first bypass line for bypassing an evaporator and a first expansion means on a refrigerant circulation line and serves as a receiver for discharging a liquid refrigerant in an air conditioning mode And in the heat pump mode, it functions as an accumulator for discharging the gaseous refrigerant, so that the number of parts can be reduced by integrating the functions of the receiver and the accumulator, which are conventionally separately provided in the heat pump system, .

In addition, two outlet pipes are formed in the accumulator with a receiver to control the flow direction of the refrigerant according to the air conditioning mode or the heat pump mode, so that various modes can be performed in the heat pump system and the heating performance can be improved.

By providing a water-cooled heat exchanger as heat supply means for recovering the waste heat of the vehicle electrical equipment on the first bypass line, the heating performance of the heat pump system is improved.

Further, a branch line is provided to connect the inlet side refrigerant circulation line of the evaporator and the first bypass line, a second bypass line is provided to bypass the outdoor heat exchanger, and indoor air is introduced into the air conditioning case This system minimizes the effect of outdoor air at low temperatures even under the outdoor temperature of 0 ℃. It also recovers the waste heat of the electric equipment and the indoor air to improve the smooth operation and heating performance of the heat pump system and minimizes the operation of the electric heater So that the vehicle traveling distance can be increased.

In the condition that the outdoor temperature is the image, the waste heat of the vehicle electrical equipment and the heat source of the outdoor air are recovered, and the waste heat of the vehicle electrical appliance and the heat source of the room air are recovered under the condition that the outdoor temperature is zero. 1 By improving the efficiency of the heat pump system by diversifying the modes according to the heat load and purpose such as the heating mode (maximum heating mode), the second heating mode (heating mode), the dehumidification mode and the defrost mode, The performance can be maintained, the operation of the electric heater can be minimized, and the travel distance of the vehicle can be increased.

Further, even in the heat pump mode, it is possible to perform the dehumidification function in the passenger compartment, thereby providing a comfortable environment for the passenger.

1 is a schematic view showing a conventional heat pump system for a vehicle,
FIG. 2 is a view showing an air conditioning mode of a heat pump system for a vehicle according to the present invention,
3 is a view showing a first heating mode of a heat pump mode of a vehicle heat pump system according to the present invention,
4 is a view showing a second heating mode of a heat pump mode of a heat pump system for a vehicle according to the present invention.
5 is a view showing a dehumidifying mode of a heat pump mode of a heat pump system for a vehicle according to the present invention.
6 is a diagram showing a defrost mode during a heat pump mode of a heat pump system for a vehicle according to the present invention.
FIG. 7 is a cross-sectional view showing a receiver-integrated accumulator in a heat pump system for a vehicle according to the present invention,
8 is a view showing the air conditioner mode when the heat supply means is installed in the heat pump system for a vehicle according to the present invention.
9 is a view showing a first heating mode of a heat pump mode when heat supply means is installed in a vehicle heat pump system according to the present invention;
10 is a diagram showing a second heating mode of a heat pump mode in a case where a heat supply means is installed in a vehicle heat pump system according to the present invention;
11 is a diagram showing a dehumidifying mode in a heat pump mode in a case where a heat supply means is installed in a vehicle heat pump system according to the present invention.
12 is a configuration diagram showing a defrost mode in a heat pump mode when heat supply means is installed in 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.

First, a heat pump system for a vehicle according to the present invention includes a compressor 100, an indoor heat exchanger 110, a second expansion means 120, and an outdoor heat exchanger (not shown) on a refrigerant circulation line R of an air conditioning system 130, a receiver-integrated accumulator 170, a first expansion means 140, and an evaporator 160 are sequentially connected to each other, and is preferably applied to an electric vehicle or a hybrid vehicle.

A first bypass line R1 for bypassing the first expansion means 140 and the evaporator 160 and a second bypass line R1 for bypassing the outdoor heat exchanger 130 are provided on the refrigerant circulation line R. [ Line accumulator 170 is connected to the branch point of the first bypass line R1 and the line R2 is connected to the expansion line R3 in which the second expansion means 120 is installed, A second direction switching valve 192 is provided at a branch point of the second bypass line R2 and the first direction switching valve 191 is installed at a branch point of the expansion line R3 .

A branch line R4 is provided so as to connect the refrigerant circulation line R at the outlet side of the first expansion means 140 and the first bypass line R1, Off valve 197 is provided.

2 and 8, the refrigerant discharged from the compressor 100 flows through the indoor heat exchanger 110, the outdoor heat exchanger 130, the accumulator 170 integrated with the receiver, the first expansion means The indoor heat exchanger 110 serves as a condenser and the evaporator 160 serves as an evaporator in order to circulate the refrigerant through the compressor 140, the evaporator 160 and the compressor 100 in this order .

Meanwhile, the outdoor heat exchanger 130 functions as a condenser as the indoor heat exchanger 110.

3 and 9, the refrigerant discharged from the compressor 100 flows through the indoor heat exchanger 110, the second expansion means 120, the outdoor heat exchanger 130 The first bypass line R1 and the compressor 100. The indoor heat exchanger 110 serves as a condenser and the outdoor heat exchanger The heat exchanger 130 serves as an evaporator, and the refrigerant is not supplied to the evaporator 160.

The heat pump system according to the present invention has the same refrigerant circulation direction in the air conditioner mode and the heat pump mode and has the first and second bypass lines R1 and R2 and the expansion line R3 and the branch line R4, , All the sections of the refrigerant circulation line (R) are shared, so that the refrigerant stagnation phenomenon that occurs when the refrigerant does not flow can be prevented, and the entire refrigerant circulation line (R) can be also simplified.

In the present invention, the heat pump mode is diversified as the first heating mode, the second heating mode, the dehumidifying mode, and the defrosting mode depending on the outdoor temperature, the heat load, or the purpose.

At this time, if the outdoor temperature is equal to or higher than the reference temperature, the control unit (not shown) performs the first heating mode, the dehumidification mode, or the defrost mode of the heat pump mode. If the outdoor temperature is lower than the reference temperature, .

Here, the reference temperature of the outdoor temperature performing the first heating mode, the dehumidifying mode or the defrosting mode in the heat pump mode is 0 ° C or higher (image), and the reference temperature of the outdoor temperature performing the second heating mode in the heat pump mode is Below 0 ° C (minus).

Of course, the reference temperature of the outdoor temperature is not limited to 0 占 폚, but may be changed according to the purpose.

The refrigerant circulation path for each mode will be briefly described as follows.

3 and 9, the first heating mode is a mode in which the refrigerant discharged from the compressor 100 passes through the indoor heat exchanger 110, the second expansion means 120, and the outdoor heat exchanger 130 The refrigerant flows into the first bypass line R1 through the accumulator 170 integrated with the receiver and the refrigerant flowing into the first bypass line R1 is circulated to the compressor 100. [

5 and 11, after the refrigerant discharged from the compressor 100 passes through the indoor heat exchanger 110, the second expansion means 120, and the outdoor heat exchanger 130, A part of the refrigerant flowing into the first bypass line R 1 is circulated to the compressor 100 and a part of the refrigerant circulated in the first bypass line R 1 is circulated through the accumulator 170, Bypasses the first expansion means 140 through the branch line R4 and circulates through the evaporator 160 to the compressor 100. [

6 and 12, the defrost mode is a mode in which the refrigerant discharged from the compressor 100 passes through the indoor heat exchanger 110 and the outdoor heat exchanger 130, And the refrigerant expanded in the first expansion means 140 is circulated through the evaporator 160 to the compressor 100. The refrigerant discharged from the first expansion means 140 flows into the first expansion means 140,

4 and 10, the second heating mode is a mode in which the refrigerant discharged from the compressor 100 passes through the indoor heat exchanger 110 and the second expansion means 120, The second bypass line R2 flows into the second bypass line R2 and bypasses the outdoor heat exchanger 130. The refrigerant passing through the second bypass line R2 flows through the first bypass line R1 and then bypasses the first expansion means 140 through the branch line R4 and then circulates through the evaporator 160 to the compressor 100. [

The compressor 100 installed on the refrigerant circulation line R receives the power from the engine (internal combustion engine, motor, etc.), sucks the refrigerant, compresses the refrigerant, and discharges the compressed refrigerant in a state of high temperature and high pressure.

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

Further, during the second heating mode, the dehumidifying mode, or the defrost mode of the heat pump mode, the refrigerant discharged from the evaporator 160 is sucked, compressed, and supplied to the indoor heat exchanger 110 side.

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 side of the compressor 100 so that air And the refrigerant discharged from the compressor (100).

The evaporator 160 is installed inside the air conditioning case 150 and is connected to the refrigerant circulation line R at the inlet side of the compressor 100 so that 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 functions 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 conditioning mode, and is stopped when the refrigerant is not supplied during the first heating mode of the heat pump mode. In the second heating mode, the dehumidifying mode and the defrosting mode, And serves as an evaporator.

The indoor heat exchanger 110 and the evaporator 160 are installed in the air conditioner case 150 at a predetermined distance from the air conditioner case 150, And an indoor heat exchanger 110 are sequentially installed.

2 and 8, the low-temperature and low-pressure refrigerant discharged from the first expansion means 140 is supplied to the evaporator 160. At this time, the blower (not shown) Air flowing through the air conditioning case 150 through the evaporator 160 is exchanged with the low temperature low pressure refrigerant in the evaporator 160 to be converted into cool air and then discharged to the vehicle interior The inside of the car is cooled.

3 and 9, the high-temperature and high-pressure refrigerant discharged from the compressor 100 flows into the indoor heat exchanger 110 through the indoor heat exchanger 110. In the heat pump mode, the indoor heat exchanger 110 functions as a condenser At this time, the air flowing through the air conditioning case 150 through the blower (not shown) is heat-exchanged with the high-temperature and high-pressure refrigerant in the indoor heat exchanger 110 in the process of passing through the indoor heat exchanger 110 After changing to the warm air, it is discharged to the inside of the vehicle and the inside of the car is heated.

The size of the evaporator 160 may be larger than the size of the indoor heat exchanger 110.

An electric heater 115 is further installed on the downstream side of the indoor heat exchanger 110 in the air conditioning case 150 to improve the heating performance.

That is, the heating performance can be improved by operating the electric heater 115 as an auxiliary heat source at the start of the vehicle. Of course, the electric heater 115 may serve as auxiliary heating during the heat pump mode as well as during the start-up period.

As the electric heater 115, a PTC heater is preferably used.

The amount of air passing through the indoor heat exchanger 110 and the amount of air passing through the indoor heat exchanger 110 are adjusted between the evaporator 160 and the indoor heat exchanger 110 in the air conditioning case 150 A temperature control door 151 is provided.

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

2 and 8, when the front side passageway of the indoor heat exchanger 110 is completely closed through the temperature control door 151, the cool air passing through the evaporator 160 serving as an evaporator 3 and 9, when the heat pump mode is selected (in the first heating mode), the air is supplied to the indoor heat exchanger 110 through the temperature control door 151 When the passageway for bypassing the indoor heat exchanger 110 is completely closed, all the air passes through the indoor heat exchanger 110 serving as a condenser (heater), and is converted into hot air. Heating is performed.

Meanwhile, when the position of the temperature control door 151 is adjusted, the temperature of the air discharged into the passenger compartment can be appropriately adjusted. For example, in the air conditioning mode, the temperature control door 151 is operated, Some of the cold air passing through the evaporator 160 bypasses the indoor heat exchanger 110 and part of the cold air passes through the indoor heat exchanger 110 It is changed into warm air. Thereafter, the cold air and the hot air are mixed to control the temperature of the inside of the car to an appropriate temperature. In addition, since the air passes through the evaporator 160 serving as an evaporator, dehumidification is also performed.

In the present invention, not only the air conditioner mode but also the second room heating mode, the dehumidifying mode, and the defrost mode in which the refrigerant is supplied to the evaporator 160 during the heat pump mode are dehumidified.

As described above, in the present invention, the dehumidification function of the passenger compartment can be operated even in the air condition 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 perform heat exchange between the refrigerant circulating in the refrigerant circulation line R and outdoor air .

The outdoor heat exchanger 130 is installed on the front side of the vehicle engine room to exchange heat with the outdoor air.

The outdoor heat exchanger 130 functions as the same condenser as the indoor heat exchanger 110 in the air conditioning mode. At this time, the high-temperature refrigerant flowing in the outdoor heat exchanger 130 is heat-exchanged with the outdoor air, do.

In the heat pump mode (first heating mode), the refrigerant acts as an evaporator opposite to the indoor heat exchanger 110. At this time, the low-temperature refrigerant flowing in the outdoor heat exchanger 130 performs heat exchange with the outdoor air And evaporates.

The first expansion means 140 is installed on the refrigerant circulation line R on the inlet side of the evaporator 160 and expands the refrigerant supplied to the evaporator 160.

That is, the first expansion means 140 expands the refrigerant that has passed through the accumulator 170 after being discharged from the outdoor heat exchanger 130 in the air conditioning mode, so that the low-temperature low-pressure liquid (frothed) state And then supplied to the evaporator 160.

As the first expansion means (140), an expansion valve or an orifice for expanding the refrigerant can be used.

The first bypass line R1 is installed to connect the inlet side refrigerant circulation line R of the first expansion means 140 and the outlet side refrigerant circulation line R of the evaporator 160 The refrigerant passing through the outdoor heat exchanger 130 selectively bypasses the first expansion means 140 and the evaporator 160 according to an air conditioning mode or a heat pump mode.

As shown in the figure, the first bypass line R1 is disposed in parallel with the first expansion means 140 and the evaporator 160, that is, the inlet side of the first bypass line R1 is connected to the outdoor Is connected to the refrigerant circulation line R connecting the heat exchanger 130 and the first expansion means 140 and the outlet side is connected to the refrigerant circulation line R connecting the evaporator 160 and the compressor 100 .

The refrigerant that has passed through the outdoor heat exchanger 130 flows to the first expansion device 140 and the evaporator 160 in the air conditioner mode. However, in the heat pump mode (first heating mode) The refrigerant that has passed through the outdoor heat exchanger 130 flows directly to the compressor 100 side through the first bypass line R 1 and bypasses the first expansion means 140 and the evaporator 160.

The role of switching the flow direction of the refrigerant according to the air conditioner mode and the heat pump mode is that the first and second on-off valves (first and second on-off valves 195, 196)

The second expansion means 120 is installed on the expansion line R3 connected in parallel on the refrigerant circulation line R connecting the indoor heat exchanger 110 and the outdoor heat exchanger 130, Thereby expanding the refrigerant flowing through the expansion line R3.

The refrigerant discharged from the indoor heat exchanger 110 bypasses the expansion line R3 according to an air conditioning mode or a heat pump mode at a branch point between the expansion line R3 and the refrigerant circulation line R, Or a first direction switching valve 191 for switching the flow direction of the refrigerant to pass through the expansion line R3.

Here, the second expansion means (120) may be constituted by an orifice or an expansion valve.

The refrigerant discharged from the compressor 100 and passing through the indoor heat exchanger 110 is introduced into the expansion line R3 and the second expansion means 120 by the first direction switching valve 191, And is supplied to the outdoor heat exchanger 130,

The refrigerant discharged from the compressor 100 and having passed through the indoor heat exchanger 110 is flowed along the expansion line R3 by the first direction switching valve 191 in the heat pump mode (in the first heating mode) And the refrigerant flowing along the expansion line (R3) is expanded while passing through the second expansion means (120), and then supplied to the outdoor heat exchanger (130).

The accumulator 170 integrated with the receiver is installed at a branch point between the first bypass line R1 and the refrigerant circulation line R and serves as a receiver for discharging the liquid refrigerant in the air conditioning mode And serves as an accumulator for discharging gaseous refrigerant in the heat pump mode.

In other words, the receiver-integrated accumulator 170 is installed on the refrigerant circulation line R connecting the outdoor heat exchanger 130 and the first expansion means 140, and the first bypass line R1) is branched.

7, the receiver-integrated accumulator 170 includes a main body 171 in which gaseous coolant and liquid coolant are separated upwardly and downwardly, and a main body 171 which is connected to the main body 171 and the outdoor heat exchanger 130 An inlet pipe 172 connecting the outlet side refrigerant circulation line R to the refrigerant circulation line R and connecting the main body 171 to the inlet side refrigerant circulation line R of the first expansion means 140, A first outlet pipe 173 for discharging liquid refrigerant in the main body 171 and a second outlet 173 connected to the main body 171 and the first bypass line Rl to discharge the gaseous refrigerant in the main body 171, And a pipe 174.

As described above, the accumulator 170 integrated with the receiver has one inlet pipe 172 and two outlet pipes 173 and 174.

The main body 171 is formed in a closed tube shape and the refrigerant discharged from the outdoor heat exchanger 130 flows into the main body 171 through the inlet pipe 172. At this time, The liquid refrigerant in the refrigerant flowing into the inside of the main body 171 is located in the lower portion of the main body 171 and the gaseous refrigerant and the liquid phase refrigerant are separated upward and downward while being positioned in the upper portion of the main body 171.

In addition, the inlet pipe 172 is connected to the upper side of the main body 171, and is installed to communicate with the gaseous refrigerant region in the main body 171

The first outlet pipe 173 for discharging the liquid refrigerant is connected to the lower side of the main body 171 and is provided to communicate with the liquid refrigerant area in the main body 171,

The second outlet pipe 174 for discharging the gaseous refrigerant is connected to the upper side of the main body 171 so as to communicate with the gaseous refrigerant region in the main body 171.

Here, the second outlet pipe 174 is formed by bending a portion of the second outlet pipe 171 inserted into the body 171 into a U-shape, and the lower end of the second outlet pipe 174 is positioned in the liquid- And the end portion is positioned so as to communicate with the gaseous refrigerant region in the main body 171.

An oil recovery filter 175 is installed at the lower end of the second outlet pipe 174 to recover the oil contained in the liquid refrigerant in the main body 171. The recovered oil flows through the second outlet Is discharged together with the gaseous refrigerant discharged along the pipe (174) and supplied to the compressor (100) side.

A dome plate 176 is provided in the main body 171 in a lower direction than the inlet pipe 172 so that the refrigerant flowing into the main body 171 through the inlet pipe 172 flows into the second outlet Thereby preventing direct entry into the pipe 174.

A desiccant 177 for removing moisture from the refrigerant introduced into the main body 171 is installed in the main body 171.

In this way, the receiver-integrated accumulator 170 performs the functions of storing the condensed liquid refrigerant, separating the gaseous refrigerant and the liquid refrigerant, removing moisture, providing the desiccant 177 and the filter mounting space, and performing oil recovery, The liquid refrigerant is discharged through the pipe 173 and the gaseous refrigerant is discharged through the second outlet pipe 174 so that both the function of the receiver and the function of the accumulator can be performed.

A first on-off valve 195 is provided on the first outlet pipe 173 or on the inlet refrigerant circulation line R of the first expansion means 140 and the second outlet pipe 174 or The first on-off valve 196 is provided on the first bypass line R1 so that the refrigerant introduced into the accumulator 170 can be supplied to the first expansion means 140 ) Or the first bypass line (R1).

That is, by providing the first and second on-off valves 195 and 196 on the side of the first and second outlet pipes 173 and 174 provided in the accumulator 170 integrated with the receiver, it is also possible to serve as a three- It is.

The first and second on-off valves 195 and 196 provided on the first and second outlet pipes 173 and 174 of the accumulator 170 are discharged from the compressor 100 in the air conditioning mode, 110 and the outdoor heat exchanger 130 flows toward the first expansion means 140 and the evaporator 160. In the heat pump mode (in the first heating mode), the refrigerant flow direction The refrigerant flow direction is controlled so that refrigerant discharged from the compressor 100 and passed through the indoor heat exchanger 110, the second expansion means 120 and the outdoor heat exchanger 130 flows to the first bypass line R1 .

A part of the refrigerant flowing to the first bypass line (R1) is caused to flow toward the evaporator (160), or a part of the refrigerant discharged from the first expansion device (140) flows into the first bypass line And a branch line R4 connecting the refrigerant circulation line R on the outlet side of the first expansion means 140 and the first bypass line R1 is provided so as to flow the refrigerant to the first bypass line R1 side, R4 is provided with a third on-off valve 197 for controlling the flow of refrigerant on and off.

On the other hand, when the branch line R4 and the third on-off valve 197 are used, a dehumidification mode can be realized in the heat pump mode.

When the outdoor temperature is an image through the control of the second bypass line (R2) and the second direction switching valve (192), the circulating refrigerant is controlled to flow toward the outdoor heat exchanger (130) The circulating refrigerant bypasses the outdoor heat exchanger 130 and is controlled to flow toward the second bypass line R2.

4, the refrigerant having passed through the second expansion means 120 is introduced into the outdoor heat exchanger 130 in order to minimize the influence of the outdoor air at a low temperature when the outdoor temperature is negative. The refrigerant passing through the second bypass line R2 flows through the evaporator 160 through the first bypass line R1 and the branch line R4, Thereby recovering the heat source of the indoor air while exchanging heat with the indoor air of the vehicle.

In this way, the refrigerant bypasses the outdoor heat exchanger (130) through the second bypass line (R2) to minimize the influence of the outdoor air at low temperature under the low temperature outdoor condition where the outdoor temperature is below zero, The refrigerant flowing through the bypass line R1 is supplied to the evaporator 160 for exchanging heat with indoor air through the branch line R4 to recover the heat source of the indoor air, thereby improving the heating performance.

8 to 12 illustrate another embodiment of the heat pump system. In FIG. 8 to FIG. 12, a heat supply means (not shown) for supplying heat to the refrigerant flowing along the first bypass line R 1 on the first bypass line R 1 180).

Here, the description of the same parts as those of the heat pump system described above will be omitted, and only the other part of the heat supply unit 180 will be described.

The heat supply unit 180 is connected to the first bypass line Rl so that waste heat of the vehicle electrical product 200 can be supplied to the refrigerant flowing through the first bypass line R1, And a cooling water heat exchanger 181b which is provided at one side of the refrigerant heat exchanger 181a and is capable of heat exchange and in which the cooling water circulating in the vehicle electrical appliance 200 flows, .

Therefore, the heating performance can be improved by recovering the heat source from the waste heat of the vehicle electrical equipment 200 in the heat pump mode.

On the other hand, the vehicle electrical equipment 200 is typically a motor, an inverter, or the like.

The heat supply unit 180 includes a cooling water circulation line W, a water cooling radiator 210, a cooling water bypass line W1 and a cooling water direction switching valve 230.

The cooling water circulation line W connects the vehicle electrical component 200 and the water-cooled radiator 210 to circulate the cooling water to the vehicle electrical component 200.

At this time, a water pump 220 is provided on the cooling water circulation line W for circulating cooling water.

Although two electrical components 200 are connected to the cooling water circulation line W in the drawing, the number of the electrical components 200 is variable.

The water-cooled radiator 210 is installed on the cooling water circulation line W so as to cool the cooling water circulating in the cooling water circulation line W to cool the vehicle electrical equipment 200, The cooling water circulating in the line W is heat-exchanged.

At this time, a blowing fan 215 is installed on one side of the water-cooled radiator 210 to blow outdoor air toward the water-cooled radiator 210, thereby improving the cooling performance of the cooling water circulating through the cooling water circulation line W.

The cooling water bypass line W1 connects the cooling water circulation line W and the cooling water heat exchanger 181b of the water-cooling type heat exchanger 181 in parallel to each other through the water pump 220, Passes through the water-cooled radiator 210 and flows to the cooling water heat exchanger 181b.

The cooling water direction switching valve 230 is provided at a branch point between the cooling water bypass line W1 and the cooling water circulation line W to change the flow direction of the cooling water according to the air conditioning mode or the heat pump mode .

Therefore, in the heat pump mode, the cooling water having passed through the electric component 200 by the operation of the water pump 220 bypasses the water-cooled radiator 210 by the cooling water direction switching valve 230, The cooling water flowing through the cooling water heat exchanging part 181b and the refrigerant flowing through the refrigerant heat exchanging part 181a along the first bypass line Rl flow into the cooling water heat exchanging part 181b of the cooling water heat exchanger 181, So that waste heat of the vehicle electrical component 200 is recovered.

In the air conditioning mode, the cooling water having passed through the electric component 200 by the operation of the water pump 220 is circulated through the water-cooling radiator 210 by the cooling water direction switching valve 230, The cooling water is cooled by heat exchange with the outdoor air to cool the electrical component 200.

In the figure, only the case where the cooling water direction switching valve 230 is installed between two electrical components 200 to recover the waste heat of the first electric component 200 in the cooling water flow direction is shown. However, (230) is installed on the outlet side of the second electrical component (200), all the waste heat of the two electrical components (200) can be recovered.

When the heat supply unit 180 is installed in the first bypass line R1, the branch line R4 is connected to the refrigerant circulation line R between the first expansion unit 140 and the evaporator 160 And an inlet-side first bypass line (R1) of the heat supply unit (180).

The second heating mode, the dehumidification mode, and the defrost mode of the heat pump mode using the branch line R4 and the third on-off valve 197 in the heat pump system provided with the heat supply unit 180 ,

10, a part of the refrigerant flowing to the first bypass line R1 through the second outlet pipe 174 of the accumulator 170 of the receiver-in-water type is partially cooled by the water- The waste heat of the vehicle electrical component 200 is recovered while passing through the heat exchanger 181, and a part of the waste heat passes through the evaporator 160 serving as an evaporator.

The second heating mode as shown in FIG. 10 is a mode in which the outdoor temperature is operating under a zero-temperature condition. The circulating refrigerant is circulated through the second bypass line (R2) to the outdoor heat exchanger (130) At this time, the refrigerant flowing through the first bypass line (R1) is branched through the branch line (R4) so as to recover the waste heat of the vehicle electrical equipment (200) and the heat source of the room air to improve the heating performance And is simultaneously supplied to the water-cooled heat exchanger 181 and the evaporator 160. Herein, indoor air is introduced into the air conditioning case 150 and is controlled in an air inflow mode so as to exchange heat with the evaporator 160.

11, a part of the refrigerant flowing to the first bypass line (R1) through the second outlet pipe (174) of the accumulator (170) with a built-in accumulator (170) is discharged to the water-cooled heat exchanger The waste heat of the vehicle electrical component 200 is recovered while passing through the evaporator 181, and a part of the waste heat passes through the evaporator 160 serving as an evaporator.

The dehumidification mode shown in FIG. 11 is a mode in which the outdoor temperature is an image, and the refrigerant that has passed through the outdoor heat exchanger 130 is recovered from the first heat exchanger 130 to recover the heat source of the outdoor air and the waste heat of the vehicle electrical equipment 200, The refrigerant flowing through the first bypass line R1 is branched through the branch line R4 to be supplied to the evaporator 160 serving as an evaporator, Thereby dehumidifying the air flowing inside the air conditioning case 150.

12, the refrigerant flows through the first outlet pipe 173 of the accumulator 170 to the first expansion means 140 side, and at this time, Some of the refrigerant passing through the expansion means 140 passes through the evaporator 160 serving as an evaporator and part of the refrigerant passes through the water-cooled heat exchanger 181 to recover the waste heat of the vehicle electrical equipment 200.

The defrost mode as shown in FIG. 12 is a mode for defrosting the freezing of the outdoor heat exchanger 130 serving as an evaporator when operating in the first heating mode as shown in FIG. 9, A part of the refrigerant passing through the first expansion means 140 after passing through the outdoor heat exchanger 130 is branched through the branch line R4 to the branch line R4, To the water-cooled heat exchanger (181), thereby deteriorating the performance of the evaporator (160) serving as an evaporator, thereby minimizing the temperature change of the room air during the defrost mode operation.

The water-cooled heat exchanger 181, which is a heat supply means 180 provided on the first bypass line R1, is disposed in the refrigerant flow direction of the first bypass line R1 And is installed on the downstream side.

On the other hand, a fourth on-off valve 198 is provided on the first bypass line R1 on the downstream side of the heat supply unit 180 for controlling the flow of the refrigerant.

As described above, according to the present invention, the waste heat of the vehicle electrical equipment 200 and the heat source of the outdoor air are recovered under the condition that the outdoor temperature is the image, and the heat source of the indoor electrical equipment 200 and the indoor heat source (Fig. 3, Fig. 9), the second heating mode (Figs. 4 and 10), the dehumidification mode (Figs. 5 and 11), and the defrosting mode (Electric vehicle or hybrid vehicle) by minimizing the operation of the electric heater 115 by improving the efficiency of the heat pump system by maintaining the heating performance by diversifying the mode depending on the heat load and purpose as shown in FIG. 12) It is possible to obtain an effect of increasing the travel distance of the vehicle.

Hereinafter, the operation of the heat pump system for a vehicle according to the present invention will be described. For the sake of convenience, a case where the heat supply means 180 is installed will be described.

end. Air conditioning mode (cooling mode, dehumidification mode)

In the air conditioning mode, as shown in FIG. 8, through the control of the first, second, third and fourth on-off valves 195, 196, 197 and 198 and the first and second directional control valves 191 and 192, The first bypass line R1, the second bypass line R2, the inflation line R3, and the branch line R4 are all closed.

The cooling water directional control valve 230 closes the cooling water bypass line W1 and circulates the cooling water circulated through the water pump 220 to circulate the vehicle electrical component 200 through the vehicle electrical component 200 and the water- And cooled.

On the other hand, at the time of maximum cooling, the temperature control door 151 in the air conditioning case 150 is operated to close the passage through the indoor heat exchanger 110, so that the air blown into the air conditioning case 150 by the blower Is cooled while passing through the evaporator (160), and is then supplied to the interior of the vehicle by bypassing the indoor heat exchanger (110), thereby cooling the interior of the vehicle.

Next, the refrigerant circulation process will be described.

The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 100 after being compressed is supplied to the indoor heat exchanger 110 installed in the air conditioning case 150.

The refrigerant supplied to the indoor heat exchanger 110 is discharged to the outdoor heat exchanger 130 without heat exchange with the air because the temperature control door 151 closes the passage on the indoor heat exchanger 110 as shown in FIG. .

The refrigerant flowing into the outdoor heat exchanger 130 is condensed while exchanging heat with the outdoor air, thereby changing the gaseous refrigerant into the liquid refrigerant.

Meanwhile, both the indoor heat exchanger 110 and the outdoor heat exchanger 130 perform the condenser dynamics, but the refrigerant is mainly condensed in the outdoor heat exchanger 130 that performs heat exchange with the outdoor air.

Subsequently, the refrigerant that has passed through the outdoor heat exchanger 130 flows into the accumulator 170 integrated with the receiver, so that the gaseous refrigerant and the liquid refrigerant are separated upwardly and downwardly. At this time, The liquid refrigerant is discharged through the opened first outlet pipe 173 and passes through the first expansion means 140.

The refrigerant passing through the first expansion means (140) is decompressed and expanded to a low temperature and low pressure state, and then flows into the evaporator (160).

The refrigerant flowing into the evaporator 160 is heat-exchanged with the air blown into the air conditioning case 150 through the blower to evaporate, and at the same time, the air is cooled by an endothermic effect due to the latent heat of evaporation of the refrigerant. And supplied to the vehicle interior to be cooled.

Then, the refrigerant discharged from the evaporator 160 flows into the compressor 100 and recycles the cycle as described above.

Meanwhile, the air conditioning mode when the heat supply unit 180 is not installed is the same as that of FIG. 2, and the refrigerant circulation process is the same.

I. First heating mode of heat pump mode

9, the first heating mode of the heat pump mode operates under the condition that the outdoor temperature is an image and uses the outdoor air and the waste heat of the vehicle electrical equipment 200 as a heat source. The first bypass line R1 is opened and the branch line R4 is closed through the control of the four on-off valves 195, 196, 197 and 198 and the first and second directional control valves 191 and 192, The refrigerant is not supplied to the expansion means 140 and the evaporator 160 side.

Further, the second bypass line R2 is closed, and the expansion line R3 is opened.

The cooling water direction switching valve 230 opens the cooling water bypass line W1 so that the cooling water circulating through the water pump 220 passes through the vehicle electrical product 200 and then flows into the water- 181 to the cooling water heat exchanger 181b to be circulated continuously. At this time, the cooling water heated by the vehicle electrical component 200 flows to the cooling water heat exchanger 181b of the water-cooled heat exchanger 181.

In the first heating mode, the temperature control door 151 in the air conditioning case 150 is operated to close the passage for bypassing the indoor heat exchanger 110 (condenser), so that the air conditioning case 150 is closed by the blower, The air blown into the evaporator 160 passes through the indoor heat exchanger 110 and is converted into hot air to be supplied to the inside of the vehicle, thereby heating the interior of the vehicle.

Next, the refrigerant circulation process will be described.

The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 100 after being compressed is introduced into the indoor heat exchanger 110 installed inside the air conditioning case 150.

The high-temperature, high-pressure gaseous refrigerant introduced into the indoor heat exchanger 110 is condensed while exchanging heat with the air blown into the air conditioning case 150 through the blower. At this time, air passing through the indoor heat exchanger 110 After changing to hot air, it is supplied to the interior of the vehicle, and the interior of the vehicle is heated.

Subsequently, the refrigerant discharged from the indoor heat exchanger 110 flows into the expansion line R3, and the refrigerant flowing into the expansion line R3 flows through the second expansion means 120 And is supplied to the outdoor heat exchanger (130).

The refrigerant supplied to the outdoor heat exchanger 130 is evaporated while exchanging heat with outdoor air, and then flows into the accumulator 170 integrated with the receiver to separate the gaseous refrigerant and the liquid refrigerant upward and downward. At this time, The gaseous refrigerant is discharged through the second outlet pipe 174 opened by the valve 196 and passes through the first bypass line R1.

The refrigerant passing through the first bypass line R1 is heat-exchanged 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, 200, and then flows into the compressor 100 to recycle the cycle as described above.

Meanwhile, the first heating mode of the heat pump mode when the heat supply unit 180 is not installed is as shown in FIG. 3, and the refrigerant circulation process is the same.

All. Second heating mode during heat pump mode

The heating mode in the heat pump mode is a mode that operates under the condition that the outdoor temperature is below zero and uses the indoor air (inflow inflow mode) and the waste heat of the vehicle electrical equipment 200 as a heat source. The first bypass line Rl and the branch line R4 are opened through the control of the first and second on-off valves 195, 196, 197 and 198 and the first and second directional control valves 191 and 192.

In addition, the second bypass line R2 and the expansion line R3 are opened.

The cooling water directional control valve 230 opens the cooling water bypass line W1 so that the cooling water circulating through the water pump 220 passes through the vehicle electrical product 200 and then flows into the water- 181 to the cooling water heat exchanger 181b to be circulated continuously. At this time, the cooling water heated by the vehicle electrical component 200 flows to the cooling water heat exchanger 181b of the water-cooled heat exchanger 181.

On the other hand, if the room temperature is a video condition, the air inflow mode of the air conditioner case 150 is controlled to be the air inflow mode, and the room air flows into the air conditioner case 150.

In the second heating mode, the temperature control door 151 in the air conditioning case 150 is operated to close the passage bypassing the indoor heat exchanger 110, so that air is blown into the air conditioning case 150 by the blower Air passes through the evaporator 160 and then passes through the indoor heat exchanger 110 and is converted into hot air to be supplied to the interior of the vehicle, thereby heating the interior of the vehicle.

Next, the refrigerant circulation process will be described.

The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 100 after being compressed is introduced into the indoor heat exchanger 110 installed inside the air conditioning case 150.

The high-temperature, high-pressure gaseous refrigerant introduced into the indoor heat exchanger 110 is condensed while exchanging heat with the air blown into the air conditioning case 150 through the blower. At this time, air passing through the indoor heat exchanger 110 After changing to hot air, it is supplied to the interior of the vehicle, and the interior of the vehicle is heated.

Subsequently, the refrigerant discharged from the indoor heat exchanger 110 flows into the expansion line R3, and the refrigerant flowing into the expansion line R3 flows through the second expansion means 120 The refrigerant flows to the second bypass line (R2) and bypasses the outdoor heat exchanger (130).

At this time, since the refrigerant bypasses the outdoor heat exchanger (130), the influence of outdoor air at a low temperature is minimized.

Thereafter, the refrigerant having passed through the second bypass line (R2) flows into the accumulator (170) integrated with the receiver, so that the gaseous refrigerant and the liquid refrigerant are separated upwardly and downwardly. At this time, The gaseous refrigerant is discharged through the second outlet pipe 174 which is opened by the first bypass line R1 and passes through the first bypass line R1.

Subsequently, some of the refrigerant passing through the first bypass line (R1) passes through the cooling water heat exchanger (181b) during the process of passing through the refrigerant heat exchanger (181a) of the water-cooled heat exchanger (181) Evaporated while recovering the waste heat of the vehicle electrical equipment 200 by heat exchange and part of the refrigerant is supplied to the evaporator 160 through the branch line R4 and is evaporated in the course of heat exchange with indoor air flowing in the air conditioning case 150. [ .

The refrigerant that has passed through the water-cooled heat exchanger 181 and the evaporator 160 is combined and then flows into the compressor 100 to recycle the cycle as described above.

4, the difference between the refrigerant circulation process and the second heat mode of the heat pump mode when the heat supply unit 180 is not installed is that the second outlet pipe (not shown) of the accumulator 170 174 are supplied to the evaporator 160 through the first bypass line R1 and the branch line R4.

la. Dehumidification mode during heat pump mode

The dehumidifying mode of the heat pump mode operates in a condition that the outdoor temperature is an image and uses the outdoor air and the waste heat of the vehicle electrical equipment 200 as a heat source. As shown in Fig. 11, It works when the room is dehumidified.

Therefore, only the portions different from the first heating mode in Fig. 9 will be described.

In the dehumidifying mode, the branch line R4 is further opened through the third on-off valve 197 in the first heating mode.

In the dehumidifying mode, the temperature control door 151 in the air conditioning case 150 is operated to close the passage bypassing the indoor heat exchanger 110, so that the air blown into the air conditioning case 150 by the blower After passing through the evaporator 160, the refrigerant passes through the indoor heat exchanger 110 and is converted into hot air to be supplied to the interior of the vehicle, thereby heating the interior of the vehicle.

At this time, since the amount of the refrigerant supplied to the evaporator 160 is small, the air cooling performance is low, so that the change in the room temperature is minimized, and the air passing through the evaporator 160 is dehumidified smoothly.

Next, the refrigerant circulation process will be described.

The refrigerant having passed through the compressor 100, the indoor heat exchanger 110, the second expansion means 120 and the outdoor heat exchanger 130 flows into the receiver-integrated accumulator 170, The gaseous refrigerant is discharged through the second outlet pipe 174 opened by the second on-off valve 196 and passes through the first bypass line R1.

A part of the refrigerant passing through the first bypass line R1 is heat-exchanged with the cooling water passing through the cooling water heat exchanging part 181b in the course of passing through the refrigerant heat exchanging part 181a of the water-cooling type heat exchanger 181, Evaporated while recovering the waste heat of the electrical component 200 and a part thereof is supplied to the evaporator 160 through the branch line R4 and evaporated in the process of heat exchange with the air flowing in the air conditioning case 150.

In this process, the air passing through the evaporator 160 is dehumidified, and the dehumidified air passing through the evaporator 160 is converted into hot air while passing through the indoor heat exchanger 110, Dehumidification is heated.

Then, the refrigerant having passed through the water-cooled heat exchanger 181 and the evaporator 160 is combined and then flows into the compressor 100, and recycles the cycle as described above.

5, the difference of the refrigerant circulation process is that the second outlet pipe 174 of the accumulator 170 with a built-in accumulator 170 has a dehumidification mode, The refrigerant discharged through the first bypass line R1 and the branch line R4 is supplied to the evaporator 160 side.

hemp. Defrost mode during heat pump mode

The defrost mode of the heat pump mode operates in a condition that the outdoor temperature is an image and uses the outdoor air and the waste heat of the vehicle electrical equipment 200 as a heat source. The defrosting mode of the outdoor heat exchanger 130 Freezing) to operate when defrosting is required.

When the defrosting operation of the outdoor heat exchanger 130 is required during operation in the first heating mode shown in FIG. 9, the defrosting mode operates the refrigerant in the air conditioning mode of FIG. 8 to cool the high-temperature refrigerant to the outdoor heat exchanger 130 And then discharged.

In addition, in the defrost mode, the circulation direction of the cooling water for recovering the waste heat of the vehicle electrical equipment 200 is the same as that of FIG. 9, only the refrigerant operates in the air conditioning mode of FIG. 8, 197 to open the branch line R4.

In the defrosting mode, the temperature control door 151 in the air conditioning case 150 is operated to close the passage through which the indoor heat exchanger 110 is bypassed, so that the air blown into the air conditioning case 150 by the blower After passing through the evaporator 160, the refrigerant passes through the indoor heat exchanger 110 and is converted into hot air to be supplied to the interior of the vehicle, thereby heating the interior of the vehicle.

At this time, since the amount of the refrigerant supplied to the evaporator 160 is small, the air cooling performance is low, thereby minimizing changes in the room temperature.

Next, the refrigerant circulation process will be described.

The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 100 after being compressed is supplied to the indoor heat exchanger 110 installed in the air conditioning case 150.

The high-temperature, high-pressure gaseous refrigerant introduced into the indoor heat exchanger 110 is condensed while exchanging heat with the air blown into the air conditioning case 150 through the blower. At this time, air passing through the indoor heat exchanger 110 After changing to hot air, it is supplied to the interior of the vehicle, and the interior of the vehicle is heated.

Subsequently, the high-temperature refrigerant discharged from the indoor heat exchanger (110) flows to the outdoor heat exchanger (130) and flows into the outdoor heat exchanger (130).

Subsequently, the refrigerant that has passed through the outdoor heat exchanger 130 flows into the accumulator 170 integrated with the receiver, so that the gaseous refrigerant and the liquid refrigerant are separated upwardly and downwardly. At this time, The liquid refrigerant is discharged through the opened first outlet pipe 173 and passes through the first expansion means 140.

The refrigerant passing through the first expansion means 140 is decompressed and expanded to a low temperature and low pressure state and then supplied to the evaporator 160. At this time, And flows toward the first bypass line (R1) through the branch line (R4).

The refrigerant supplied to the evaporator 160 is evaporated by heat exchange with the air blown into the air conditioning case 150 through the blower, and the refrigerant supplied to the first bypass line R 1 flows through the water-cooled heat exchanger 181 Exchanges heat with the cooling water passing through the cooling water heat exchanging unit 181b to collect the waste heat of the vehicle electrical equipment 200 and evaporate.

Then, the refrigerant having passed through the water-cooled heat exchanger 181 and the evaporator 160 is combined and then flows into the compressor 100, and recycles the cycle as described above.

6, the refrigerant circulation process is different in that the refrigerant discharged from the first expansion device 140 flows to the branch line (not shown) The refrigerant is supplied to the evaporator 160 without branching to the evaporator R4.

100: compressor 110: indoor heat exchanger
115: electric heater 120: second expansion means
130: outdoor heat exchanger 140: first expansion means
150: air conditioning case 151: temperature control door
160: evaporator 170: accumulator type accumulator
171: main body 172: inlet pipe
173: first outlet pipe 174: second outlet pipe
175: Oil recovery filter 176: Dome plate
177: Desiccant
180: Heat supply unit 181: Water-cooled heat exchanger
181a: refrigerant heat exchanger 181b: cooling water heat exchanger
191: first direction switching valve 192: second direction switching valve
195: first on-off valve 196: second on-off valve
197: third on-off valve 198: fourth on-off valve
200: Electrical equipment 210: Water-cooled radiator
220: Water pump 230: Cooling water direction switching valve
R: refrigerant circulation line R1: first bypass line
R2: second bypass line R3: inflation line
R4: Branch line

Claims (11)

A compressor 100 installed on the refrigerant circulation line R for compressing and discharging the refrigerant,
The air conditioning case 150 is installed inside the air conditioner case 150 and is connected to an outlet side refrigerant circulation line R of the compressor 100 so that air flowing in the air conditioning case 150 and refrigerant discharged from the compressor 100 An indoor heat exchanger 110 for exchanging heat with the indoor heat exchanger 110,
The air conditioning case 150 is installed inside the air conditioner case 150 and is connected to the refrigerant circulation line R at the inlet side of the compressor 100 so that air flowing in the air conditioning case 150 and air An evaporator 160 for exchanging heat with the refrigerant,
An outdoor heat exchanger (130) installed outside the air conditioning case (150) for exchanging heat between the refrigerant circulating in the refrigerant circulation line (R) and outdoor air,
A first expansion means (140) installed on an inlet side refrigerant circulation line (R) of the evaporator (160) for expanding a refrigerant supplied to the evaporator (160)
A refrigerant circulation line R connected to the inlet side refrigerant circulation line R of the first expansion means 140 and an outlet side refrigerant circulation line R of the evaporator 160, A first bypass line (R1) for selectively bypassing the first expansion means (140) and the evaporator (160) according to an air conditioner mode or a heat pump mode,
A refrigerant circulation line R connected to the indoor heat exchanger 110 and the outdoor heat exchanger 130 to expand the refrigerant flowing in the expansion line R3, 2 expansion means 120,
The first bypass line (R1) and the refrigerant circulation line (R) serve as a receiver for discharging the liquid refrigerant in the air conditioner mode. In the heat pump mode, And a receiver-integrated accumulator 170 serving as an accumulator,
On the first bypass line R1, there is provided a heat supply means 180 for supplying heat to the refrigerant flowing along the first bypass line R1,
The heat supply unit 180 is connected to the first bypass line Rl so that waste heat of the vehicle electrical product 200 can be supplied to the refrigerant flowing through the first bypass line R1, And a cooling water heat exchanger 181b which is provided at one side of the refrigerant heat exchanger 181a and is capable of heat exchange and in which the cooling water circulating in the vehicle electrical appliance 200 flows, However,
The heat supply unit 180,
A cooling water circulation line W having a water pump 220 for circulating cooling water to the vehicle electrical equipment 200,
A water-cooled radiator 210 installed on the cooling water circulation line W for exchanging heat between outdoor air and cooling water circulating through the cooling water circulation line W,
The cooling water circulating line W and the cooling water heat exchanger 181b of the water-cooled heat exchanger 181 are connected in parallel to each other so that the cooling water, which has passed through the electric component 200 through the water pump 220, 210 to the cooling water heat exchanger 181b to flow into the cooling water heat exchanger 181b,
And a cooling water direction switching valve (230) provided at a branch point between the cooling water bypass line (W1) and the cooling water circulation line (W) for switching the flow direction of the cooling water according to an air conditioning mode or a heat pump mode A heat pump system for a vehicle. The method according to claim 1,
The receiver-integrated accumulator (170)
A main body 171 in which the gaseous refrigerant and the liquid phase refrigerant are separated upwardly and downwardly,
An inlet pipe 172 connecting the main body 171 to the outlet side refrigerant circulation line R of the outdoor heat exchanger 130 to introduce the refrigerant,
A first outlet pipe 173 connecting the main body 171 and the inlet refrigerant circulation line R of the first expansion means 140 to discharge the liquid refrigerant in the main body 171,
And a second outlet pipe (174) connected to the main body (171) and the first bypass line (R1) to discharge the gaseous refrigerant in the main body (171). 3. The method of claim 2,
A first on-off valve 195 is provided on the first outlet pipe 173 or on the inlet side refrigerant circulation line R of the first expansion means 140 and the second outlet pipe 174 or the above- A second on-off valve 196 is provided on the bypass line R1,
Characterized in that the refrigerant flow direction is controlled so that the refrigerant flowing into the receiver-integrated accumulator (170) flows to the first expansion means (140) or the first bypass line (R1) according to the air conditioning mode or the heat pump mode The heat pump system for vehicles. 3. The method of claim 2,
The inlet pipe 172 is provided so as to communicate with the gaseous refrigerant region of the main body 171,
The first outlet pipe 173 is installed so as to communicate with the liquid refrigerant region of the main body 171,
And the second outlet pipe (174) is arranged to communicate with the gaseous refrigerant region of the main body (171). The method according to claim 1,
The refrigerant discharged from the indoor heat exchanger 110 bypasses or inflates the expansion line R3 according to an air conditioning mode or a heat pump mode at a branch point between the expansion line R3 and the refrigerant circulation line R. [ And a first direction switching valve (191) for switching the flow direction of the refrigerant to pass through the line (R3). The method according to claim 1,
A second bypass line R2 is installed in parallel with the refrigerant circulation line R so that the refrigerant circulating through the refrigerant circulation line R bypasses the outdoor heat exchanger 130,
The refrigerant flows in the flow direction of the refrigerant so that the refrigerant flows to the outdoor heat exchanger 130 or the second bypass line R 2 in accordance with the outdoor temperature at the branch point of the second bypass line R 2 and the refrigerant circulation line R And a second direction switching valve (192) for switching the first direction switching valve (192). The method according to claim 1,
A part of the refrigerant flowing into the first bypass line R 1 flows toward the evaporator 160 or a part of the refrigerant discharged from the first expansion unit 140 flows into the first bypass line R 1, Side refrigerant circulation line R of the first expansion means 140 and the branch line R4 for connecting the first bypass line R1 to the refrigerant circulation line R,
And a third on-off valve (197) is provided on the branch line (R4). delete delete delete The method according to claim 1,
The evaporator 160 and the indoor heat exchanger 110 are installed inside the air conditioner case 150 at a predetermined distance from the air conditioner case 150. The evaporator 160 and the indoor heat exchanger 110 are installed in the air conditioner case 150, And an indoor heat exchanger (110) are sequentially installed.

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