KR20130057082A - Heat pump system for vehicle - Google Patents

Abstract

PURPOSE: A heat pump system for a vehicle is provided to perform a liquid receiver role in an air conditioning mode and an accumulator role in a heat pump mode by installing a liquid receiver integrated accumulator in a branch point of a first bypass line bypassing an evaporator and a first expansion unit. CONSTITUTION: A heat pump system for a vehicle comprises a first expansion unit(140), a first bypass line(R1), a second expansion unit(120), and a liquid receiver integrated accumulator(170). The first expansion unit is installed on a refrigerant circulation line(R) of an evaporator(160) and expands a refrigerant supplied to the evaporator. The first bypass line connects the refrigerant circulation line on an inlet side of the first expansion unit and the refrigerant circulation line on an outlet side of the evaporator and selectively bypasses the first expansion unit and the evaporator according to an air conditioning mode or a heat pump mode with the refrigerant passing through an outer heat exchanger(140). The second expansion unit is installed on an expansion line(R3) parallelly connected to the refrigerant circulation line connecting an inner heat exchanger(110) and the outer heat exchanger. The liquid receiver integrated accumulator is installed at a branch point of the first bypass line and the refrigerant circulation line and performs a liquid receiver role discharging a liquid refrigerant in the air conditioning mode. The liquid receiver integrated accumulator performs an accumulator role discharging a gas refrigerant in a heat pump mode.

Description

[0001] Heat pump system for vehicle [0002]

The present invention relates to a vehicle heat pump system, and more particularly to a vehicle heat pump system, and more particularly, a branch of a first bypass line bypassing the evaporator and the first expansion means on the refrigerant circulation line. A receiver integrated accumulator is installed at a point, and serves as a receiver for discharging liquid refrigerant in an air conditioner 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.

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. A first expansion valve 34 and a first bypass 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 bypass valve 36; The outdoor unit 48 for heat-exchanging the refrigerant passing through the outside), the low pressure side heat exchanger 60 for evaporating the refrigerant passed through the outdoor unit 48, and the refrigerant passed through the low pressure side heat exchanger 60 An accumulator (62) for separating gaseous and liquid refrigerants, an internal heat exchanger (50) for exchanging a refrigerant supplied to the low pressure side heat exchanger (60), a refrigerant returning to the compressor (30), and the low pressure Second fold to selectively expand the refrigerant supplied to the side heat exchanger (60) A second bypass valve 58 disposed in parallel with the valve 56 and the second expansion valve 56 to selectively connect the outlet side of the outdoor unit 48 and the inlet side of the accumulator 62; It is made, including.

In addition, a receiver 49 is installed at the outlet side 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 incoming refrigerant and discharges only the gaseous refrigerant to the compressor 30. The main functions include liquid separation, oil recovery, and the like from the refrigerant flowing into the compressor 30. The refrigerant is stored.

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. Accordingly, the refrigerant discharged from the compressor 30 may include the high pressure side heat exchanger 32, the first expansion valve 34, the outdoor unit 48, the high pressure unit 52 of the internal heat exchanger 50, and the second bypass valve 58. ), 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 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. Accordingly, the refrigerant discharged from the compressor 30 may include 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, 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 sequentially 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 radiator as in the heat pump mode do.

However, the conventional heat pump system is manufactured by providing a receiver 49 on the outlet side of the outdoor unit 48 and separately accumulating the accumulator 55 on the inlet side of the compressor 30 to increase the number of parts. There is a problem of increased cost.

In particular, since the outdoor unit 48 serves as an evaporator in the heat pump mode in the heat pump system, the receiver 49 installed at the outlet side of the outdoor unit 48 is not necessary.

In addition, the desiccant having a function of removing moisture from the accumulator 55 has a problem that the receiver 49 does not need it because it performs the function.

An object of the present invention for solving the above problems is to install a receiver integrated accumulator at the branch point of the first bypass line bypassing the evaporator and the first expansion means on the refrigerant circulation line, the liquid refrigerant in the air conditioner mode By acting as an accumulator for discharging and acting as an accumulator for discharging gaseous refrigerant in the heat pump mode, it reduces the number of parts and integrates the functions of the accumulator and accumulator which were previously separately configured in the heat pump system. Due to this, manufacturing costs can be reduced, and two outlet pipes can be formed in the accumulator integrated accumulator to control the flow direction of the refrigerant according to the air conditioner mode or the heat pump mode to perform various modes in the heat pump system. Automotive heat pump system to improve heating performance To provide.

The present invention for achieving the above object, the compressor is installed on the refrigerant circulation line to compress and discharge the refrigerant, and installed inside the air conditioning case and connected to the refrigerant circulation line of the outlet side of the compressor, the air conditioning case An indoor heat exchanger for heat-exchanging the air flowing in the refrigerant and the refrigerant discharged from the compressor, and installed in the air conditioning case and connected to the refrigerant circulation line at the inlet side of the compressor, the air flowing in the air conditioning case and the An evaporator for exchanging the refrigerant supplied to the compressor, an outdoor heat exchanger installed outside the air conditioning case for exchanging the refrigerant circulating through the refrigerant circulation line, and outdoor air, and installed on an inlet refrigerant circulation line of the evaporator, First expansion means for expanding the refrigerant supplied to the evaporator, and an inlet side of the first expansion means A first bypass line installed to connect a refrigerant circulation line with an outlet side refrigerant circulation line of the evaporator, wherein a first refrigerant line bypasses the first expansion means and the evaporator, and the first bypass line and the refrigerant circulation A first directional valve installed at a branch point of the line to change 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 an air conditioner mode or a heat pump mode; And heat supply means installed on the first bypass line to supply heat to the refrigerant flowing along the first bypass line, and installed on the refrigerant circulation line at the inlet side of the outdoor heat exchanger. It characterized in that it comprises a second expansion means for selectively expanding the refrigerant supplied to the outdoor heat exchanger according to the mode.

The present invention is to install a receiver integrated accumulator at the branch point of the first bypass line bypassing the evaporator and the first expansion means on the refrigerant circulation line, and serves as a receiver for discharging the liquid refrigerant in the air conditioner mode In the heat pump mode, it acts as an accumulator that discharges gaseous refrigerant, thereby reducing the number of parts and reducing manufacturing costs by integrating the functions of the accumulator and accumulator that were previously separately configured in the heat pump system. .

In addition, by forming two outlet pipes in the accumulator integrated accumulator to control the flow direction of the refrigerant in accordance with the air conditioning mode or heat pump mode can perform a variety of modes in the heat pump system and improve the heating performance.

In addition, the heating performance of the heat pump system is improved by installing a water-cooled heat exchanger, which is a heat supply means, on the first bypass line so as to recover waste heat of the vehicle electrical equipment.

In addition, a branch line is installed to connect the refrigerant circulation line of the inlet side of the evaporator to the first bypass line, a second bypass line is installed to bypass the outdoor heat exchanger, and indoor air is introduced into the air conditioning case. By controlling, it minimizes the influence of low temperature outdoor air even under the condition of outdoor temperature, and recovers the waste heat of electrical equipment and the heat source of indoor air to improve the smooth operation and heating performance of the heat pump system and minimize the operation of the electric heating heater. The vehicle mileage can be increased.

In addition, when the outdoor temperature is an image, the waste heat of the vehicle electronics and the heat source of the outdoor air are recovered, and when the outdoor temperature is below zero, the waste heat of the vehicle electronics and the heat source of the indoor air are recovered and the heat pump mode is removed. By varying the modes according to the heat load and purpose, such as 1 heating mode (maximum heating mode), 2nd heating mode (heating mode), dehumidification mode, defrost mode, the efficiency of the heat pump system is improved to improve heating performance and heating. Performance can be maintained and the mileage of the vehicle can be increased by minimizing the operation of the electrically heated heater.

In addition, even in the heat pump mode can perform a dehumidification function in the vehicle can provide a comfortable environment for the occupants.

1 is a schematic view showing a conventional heat pump system for a vehicle,
2 is a block diagram showing an air conditioner mode of a vehicle heat pump system according to the present invention;
3 is a block diagram showing a first heating mode of the heat pump mode of the vehicle heat pump system according to the present invention,
4 is a block diagram showing a second heating mode of the heat pump mode of the vehicle heat pump system according to the present invention,
5 is a configuration diagram showing a dehumidification mode of the heat pump mode of the vehicle heat pump system according to the present invention,
6 is a configuration diagram showing a defrost mode of the heat pump mode of the vehicle heat pump system according to the present invention,
7 is a cross-sectional view showing a receiver integrated accumulator in a vehicle heat pump system according to the present invention;
8 is a block diagram showing an air conditioner mode when a heat supply means is installed in a vehicle heat pump system according to the present invention;
9 is a configuration diagram showing a first heating mode of the heat pump mode when the heat supply means is installed in the vehicle heat pump system according to the present invention;
10 is a block diagram showing a second heating mode of the heat pump mode when the heat supply means is installed in the vehicle heat pump system according to the present invention;
11 is a block diagram showing a dehumidification mode of the heat pump mode when the heat supply means is installed in the vehicle heat pump system according to the present invention;
12 is a block diagram showing a defrost mode of the heat pump mode when the heat supply means is installed in the 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, the vehicle heat pump system according to the present invention includes a compressor 100, an indoor heat exchanger 110, a second expansion means 120, and an outdoor heat exchanger on a refrigerant circulation line R of an air conditioner system. 130, the receiver integrated accumulator 170, the first expansion means 140, and the evaporator 160 is configured to be connected in sequence, it is preferably applied to an electric vehicle or a hybrid vehicle.

In addition, on the refrigerant circulation line R, the first bypass line R1 bypasses the first expansion means 140 and the evaporator 160 and the second bypass bypasses the outdoor heat exchanger 130. A line R2 and an expansion line R3 on which the second expansion means 120 are installed are connected in parallel, respectively, and a receiver integrated accumulator 170 is provided at a branch point of the first bypass line R1. The second divert valve 192 is installed at the branch point of the second bypass line R2, and the first divert valve 191 is installed at the branch point of the expansion line R3. .

In addition, a branch line (R4) is provided to connect the outlet refrigerant circulation line (R) and the first bypass line (R1) of the first expansion means 140, a third on the branch line (R4) On-off valve 197 is provided.

Therefore, in the air conditioner mode, as shown in FIGS. 2 and 8, the refrigerant discharged from the compressor 100 is transferred to the indoor heat exchanger 110, the outdoor heat exchanger 130, the accumulator integrated accumulator 170 and the first expansion means. 140, the evaporator 160, and the compressor 100 are sequentially circulated, and at this time, the indoor heat exchanger 110 serves as a condenser (heater) and the evaporator 160 serves as an evaporator. .

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

In the heat pump mode (first heating mode), as shown in FIGS. 3 and 9, 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 accumulator integrated accumulator 170, the first bypass line (R1), the compressor 100 is sequentially circulated, wherein the indoor heat exchanger 110 serves as a condenser (heater) and the outdoor The heat exchanger 130 serves as an evaporator, and the refrigerant is not supplied to the evaporator 160.

As described above, the heat pump system of the present invention has the same refrigerant circulation direction in the air conditioner mode and the heat pump mode, and the first and second bypass lines R1 and R2, the expansion line R3, and the branch line R4. Except for this, by commonizing all sections of the refrigerant circulation line (R), it is possible to prevent the refrigerant congestion occurring when the refrigerant does not flow, and to simplify the entire refrigerant circulation line (R).

In the present invention, the heat pump mode is diversified as the first heating mode, the second heating mode, the dehumidification mode, and the defrost mode according to the outdoor temperature, the heat load, or the purpose.

At this time, the controller not shown performs the first heating mode or dehumidification mode or the defrost mode of the heat pump mode when the outdoor temperature is higher than the reference temperature, and performs the second heating mode of the heat pump mode when the outdoor temperature is less than the reference temperature. Done.

Here, the reference temperature of the outdoor temperature performing the first heating mode, the dehumidification mode or the defrost mode of the heat pump mode is 0 ℃ or more (image), and the reference temperature of the outdoor temperature performing the second heating mode of the heat pump mode is It is less than 0 degreeC (less than zero).

Of course, the reference temperature of the outdoor temperature is not limited to 0 ° C., and may be changed according to the purpose.

On the other hand, the refrigerant circulation path for each mode briefly described as follows.

In the first heating mode, as shown in FIGS. 3 and 9, 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. Thereafter, the refrigerant flows into the first bypass line R1 through the integrated accumulator 170 and the refrigerant introduced into the first bypass line R1 is circulated to the compressor 100.

In the dehumidification mode, as shown in FIGS. 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, Some of the refrigerant introduced into the first bypass line R1 through the receiver integrated accumulator 170 is circulated to the compressor 100 and some of the refrigerant flows into the first bypass line R1. After bypassing the first expansion means 140 through a branch line (R4) is made to circulate to the compressor 100 via the evaporator 160.

6 and 12, after the refrigerant discharged from the compressor 100 passes through the indoor heat exchanger 110 and the outdoor heat exchanger 130, the receiver integrated accumulator 170 is used. Through the first expansion means 140 is introduced and expanded through, the refrigerant expanded in the first expansion means 140 is made to circulate to the compressor 100 via the evaporator 160.

In the second heating mode, as shown in FIGS. 4 and 10, the second bypass line after the refrigerant discharged from the compressor 100 passes through the indoor heat exchanger 110 and the second expansion means 120. The refrigerant flows to R2 and bypasses the outdoor heat exchanger 130, and the refrigerant passing through the second bypass line R2 passes through the receiver integrated accumulator 170 to pass through the first bypass line. R1) flows into the compressor 100 after bypassing the first expansion means 140 through the branch line R4.

In addition, the compressor 100 installed on the refrigerant circulation line R receives and compresses a refrigerant while driving by receiving power from an engine (an internal combustion engine or a motor), and discharges the refrigerant in a gaseous state at a 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.

In addition, in the second heating mode, the dehumidification mode, or the defrost mode of the heat pump mode, the refrigerant discharged from the evaporator 160 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 side of the compressor (100) to allow air to flow in the air conditioning case (150). And heat the refrigerant discharged from the compressor (100).

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 is stopped because the refrigerant is not supplied in the first heating mode of the heat pump mode, and the refrigerant is supplied in the second heating mode, the dehumidification mode, and the defrost mode. It will act 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.

Therefore, in the air conditioner mode in which the evaporator 160 operates, as shown in FIGS. 2 and 8, a low temperature low pressure refrigerant discharged from the first expansion means 140 is supplied to the evaporator 160, and at this time, a blower ( The air flowing through the inside of the air conditioning case 150 through the evaporator 160 is exchanged with the low temperature low pressure refrigerant inside the evaporator 160 to be converted into cold air, and then discharged into the vehicle interior. The interior of the car is cooled.

In the heat pump mode in which the indoor heat exchanger 110 serves as a condenser (heater), as shown in FIGS. 3 and 9, the high temperature and high pressure refrigerant discharged from the compressor 100 is transferred to the indoor heat exchanger 110. In this case, the air flowing in the air conditioning case 150 through the blower (not shown) exchanges heat with the high temperature and high pressure refrigerant inside 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 into the vehicle interior to heat the interior of the vehicle.

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

In addition, an electric heating heater 115 is further installed on the downstream side of the indoor heat exchanger 110 inside the air conditioning case 150 to improve 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 an auxiliary heating during the heat pump mode as well as the initial start-up.

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,

In this case, when the air conditioner mode completely closes the front passage of the indoor heat exchanger 110 through the temperature control door 151 as shown in FIGS. 2 and 8, the cold air passing through the evaporator 160 serving as an evaporator. Since the indoor heat exchanger (110) is bypassed and supplied to the cabin, maximum cooling is performed, and in the heat pump mode (in the first heating mode), as shown in FIGS. 3 and 9 through the temperature control door 151. When the passage bypassing the indoor heat exchanger 110 is completely closed, all the air passes through the indoor heat exchanger 110 acting as a condenser (heater) and is converted into warm air, and thus the warm air is supplied into the cabin. Heating is carried out.

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 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 addition, in the present invention, the interior of the vehicle is dehumidified in the second heating mode, the dehumidification mode, and the defrost mode in which the refrigerant is supplied to the evaporator 160 in the heat pump mode.

As such, the present invention can operate the interior dehumidification function in the air conditioner 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 (first heating mode) it serves as an evaporator opposite to the indoor heat exchanger 110, wherein the low-temperature refrigerant flowing inside the outdoor heat exchanger 130 to exchange heat with outdoor air As it evaporates.

In addition, the first expansion means 140 is installed on the refrigerant circulation line R of the inlet side of the evaporator 160 to expand the refrigerant supplied to the evaporator 160.

That is, the first expansion means 140, in the air-conditioning mode is discharged from the outdoor heat exchanger 130, and expands the refrigerant passing through the receiver integrated accumulator 170 to the low-temperature low-pressure liquid state (wetting) state After that, it is supplied to the evaporator 160.

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

The first bypass line R1 is installed to connect the inlet refrigerant circulation line R of the first expansion means 140 and the outlet 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 the air conditioner mode or the heat pump mode.

As shown in the drawing, 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 located outdoors. It is connected to the refrigerant circulation line (R) connecting the heat exchanger (130) and the first expansion means (140), the outlet side is connected to the refrigerant circulation line (R) connecting the evaporator (160) and the compressor (100). .

Thus, in the air conditioner mode, the refrigerant passing through the outdoor heat exchanger 130 flows to the first expansion means 140 and the evaporator 160, but in the heat pump mode (in the first heating mode), The refrigerant passing through the outdoor heat exchanger 130 flows directly to the compressor 100 through the first bypass line R1 to bypass the first expansion means 140 and the evaporator 160.

Here, the role of switching the flow direction of the refrigerant in accordance with the air conditioning mode and the heat pump mode, the first, second on-off valve (173.174) installed on the first and second outlet pipe (173.174) side of the receiver integrated accumulator 170 to be described later ( Controlled via 195,196

The second expansion means 120 is installed on an expansion line R3 connected in parallel on a refrigerant circulation line R connecting the indoor heat exchanger 110 and the outdoor heat exchanger 130. The refrigerant flowing through the expansion line (R3) is expanded.

In addition, at the branch point of the expansion line R3 and the refrigerant circulation line R, the refrigerant discharged from the indoor heat exchanger 110 bypasses the expansion line R3 according to the air conditioner mode or the heat pump mode. 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 configured by an orifice or expansion valve.

Therefore, in the air conditioner mode, the refrigerant discharged from the compressor 100 and passed through the indoor heat exchanger 110 is expanded by the first diverter valve 191 to the expansion line R3 and the second expansion means 120. Bypass the supply to the outdoor heat exchanger 130,

In the heat pump mode (first heating mode), the refrigerant discharged from the compressor 100 and passed through the indoor heat exchanger 110 is along the expansion line R3 by the first direction switching valve 191. 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 receiver integrated accumulator 170 is installed at a branch point of the first bypass line R1 and the refrigerant circulation line R to serve as a receiver for discharging a liquid refrigerant in an air conditioner mode. In addition, the heat pump mode serves as an accumulator for discharging the gaseous refrigerant.

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 to the first bypass line. It is installed at the point where R1) branches.

As illustrated in FIG. 7, the receiver integrated accumulator 170 includes a main body 171 in which a gas phase refrigerant and a liquid refrigerant are separated up and down and stored therein, and the main body 171 and the outdoor heat exchanger 130. The main body is connected to an inlet pipe 172 through which an outlet refrigerant circulation line R is introduced to introduce refrigerant, and an inlet refrigerant circulation line R of the main body 171 and the first expansion means 140. A first outlet pipe 173 for discharging the liquid refrigerant in the 171, and a second outlet for discharging the gaseous refrigerant in the main body 171 by being connected to the main body 171 and the first bypass line (R1) Pipe 174.

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

The main body 171 is formed in a sealed barrel shape, and the refrigerant discharged from the outdoor heat exchanger 130 flows into the main body 171 through the inlet pipe 172, wherein the main body 171 is provided. Of the refrigerant introduced into the liquid refrigerant is located in the lower portion in the main body 171, the gas phase refrigerant is located in the upper portion in the main body 171, the gas phase refrigerant and the liquid refrigerant is separated up and down.

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

In this case, the second outlet pipe 174 is formed by bending the portion inserted into the main body 171 in a “U” shape, wherein the lower end portion is positioned to be immersed in the liquid refrigerant region in the main body 171. The end is positioned to communicate with the gas phase refrigerant region in the body 171.

In addition, 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, and the recovered oil is the second outlet. It is discharged along with the gaseous refrigerant discharged along the pipe 174 and supplied to the compressor 100.

In addition, a dome plate 176 is installed inside the main body 171 in a lower direction than the inlet pipe 172, and the refrigerant flowing into the main body 171 through the inlet pipe 172 is provided in the second outlet. To prevent direct entry into pipe 174.

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

As such, the receiver integrated accumulator 170, condensed liquid refrigerant storage, gas phase refrigerant and liquid refrigerant separation, water removal, desiccant 177 and filter mounting space to perform the role of oil recovery and the first outlet By discharging the liquid refrigerant through the pipe 173 and the gaseous refrigerant through the second outlet pipe 174, both the function of the receiver and the function of the accumulator can be performed.

In addition, a first on-off valve 195 is installed on the first outlet pipe 173 or the inlet refrigerant circulation line R of the first expansion means 140, and the second outlet pipe 174 or A second on / off valve 196 is installed on the first bypass line R1 so that the refrigerant flowing into the receiver integrated accumulator 170 is first expanded by the air conditioner mode or the heat pump mode. ) Or the refrigerant flow direction to flow to the first bypass line (R1).

That is, by installing the first and second on-off valves 195 and 196 on the first and second outlet pipes 173.174 installed in the receiver integrated accumulator 170, the three-way valve may also serve to control the flow direction of the refrigerant. It is.

Accordingly, the first and second on / off valves 195 and 196 installed at the first and second outlet pipes 173 and 174 of the receiver integrated accumulator 170 are discharged from the compressor 100 in the air conditioner mode to provide an indoor heat exchanger ( Refrigerant passing through the 110 and the outdoor heat exchanger 130 to control the flow direction of the refrigerant to flow toward the first expansion means 140 and the evaporator 160, in the heat pump mode (in the first heating mode) The refrigerant flow direction is controlled so that the 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. Done.

In addition, some of the refrigerant flowing in the first bypass line R1 flows toward the evaporator 160, or some of the refrigerant discharged from the first expansion means 140 is transferred to the first bypass line. A branch line R4 connecting the outlet refrigerant circulation line R and the first bypass line R1 of the first expansion means 140 is installed to flow to the R1 side, and the branch line ( On R4), a third on / off valve 197 is provided to control the refrigerant flow on and off.

Meanwhile, when the branch line R4 and the third on / off valve 197 are used, the dehumidification mode may be implemented 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.

Here, when the outdoor temperature is below zero, as shown in the second heating mode of FIG. 4, the refrigerant passing through the second expansion means 120 may pass through the outdoor heat exchanger 130 to minimize the influence of low temperature outdoor air. Bypass flows to the second bypass line (R2) side, the refrigerant passing through the second bypass line (R2) through the first bypass line (R1) and branch line (R4) the evaporator (160) The heat source of the indoor air is recovered while being heat exchanged with the vehicle indoor air.

As such, in a low heat source condition at which the outdoor temperature is below zero, the refrigerant bypasses the outdoor heat exchanger 130 through the second bypass line R2 so as to minimize the influence of low temperature outdoor air, and also the first By supplying the refrigerant flowing through the bypass line (R1) to the evaporator 160 for heat exchange with the indoor air through the branch line (R4) to recover the heat source of the indoor air, it is possible to improve the heating performance.

8 to 12 are heat supply means for supplying heat to the refrigerant flowing along the first bypass line (R1) on the first bypass line (R1) as another embodiment of the heat pump system ( 180) is installed.

Here, the description of the same parts as the above-described heat pump system will be omitted, and only the heat supply means 180 which is another part will be described.

The heat supply unit 180 is a refrigerant heat exchanger through which the refrigerant flowing through the first bypass line R1 flows to supply the waste heat of the vehicle electronics 200 to the refrigerant flowing through the first bypass line R1. A water-cooled heat exchanger 181 including a portion 181a and a coolant heat exchanger 181b provided at one side of the refrigerant heat exchanger 181a and having a coolant circulating in the vehicle electrical equipment 200 flows therethrough. It is done by

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.

Here, the heat supply means 180 will be described in more detail. The cooling water circulation line W, the water cooling radiator 210, the cooling water bypass line W1, and the cooling water direction switching valve 230 are described.

The cooling water circulation line W connects the vehicle electronics 200 and the water cooling radiator 210 to circulate the cooling water in the vehicle electronics 200.

At this time, the cooling water circulation line (W) is provided with a water pump 220 for cooling water circulation.

In the figure, only the case in which two electrical appliances 200 are connected on the cooling water circulation line W, the number is changeable.

The water cooling radiator 210 is installed on the cooling water circulation line (W) so as to cool the vehicle electrical equipment 200 by cooling the cooling water circulating in the cooling water circulation line (W) to circulate the outdoor air and the cooling water. The cooling water circulating in the line (W) is to heat exchange.

At this time, a blower fan 215 is installed at one side of the water-cooled radiator 210 to blow outdoor air to the water-cooled radiator 210 to improve cooling performance of the coolant circulating in the coolant 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 heat exchanger 181 in parallel to connect the electronic device 200 through the water pump 220. The cooling water passing through) bypasses the water cooling radiator 210 and flows to the cooling water heat exchanger 181b.

In addition, the coolant diverter valve 230 is installed at a branch point of the coolant bypass line W1 and the coolant circulation line W to change the flow direction of the coolant according to an air conditioner mode or a heat pump mode. .

Therefore, in the heat pump mode, the cooling water passing through the electrical equipment 200 by the operation of the water pump 220 bypasses the water cooling radiator 210 by the cooling water direction switching valve 230 and the water cooling heat exchanger. 181 flows to the cooling water heat exchanger 181b, and in this process, the cooling water flowing through the cooling water heat exchanger 181b and the refrigerant flowing through the refrigerant heat exchanger 181a along the first bypass line R1 are mutually connected. The heat exchange is to recover the waste heat of the vehicle electronics (200).

In the air conditioner mode, the coolant passing through the electrical equipment 200 by the operation of the water pump 220 circulates through the water cooling radiator 210 by the coolant diverter valve 230. Cooling water is cooled by heat exchange with the outdoor air to cool the electronic device 200.

On the other hand, as the coolant direction switching valve 230 is installed between the two electrical equipment 200, it shows only the case of recovering the waste heat of the first electrical equipment 200 in the cooling water flow direction, the cooling water direction switching valve When the 230 is installed at the outlet side of the second electronic device 200, it is possible to recover both waste heat of the two electronic device 200.

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

Here, in the heat pump system in which the heat supply means 180 is installed, 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 will be described. ,

First, in the second heating mode of the heat pump mode, some of the refrigerant flowing through the second outlet pipe 174 of the receiver integrated accumulator 170 toward the first bypass line R1 as shown in FIG. 10 is water-cooled. While passing through the heat exchanger 181, the waste heat of the vehicle electronics 200 is recovered, and a portion of the waste heat passes through the evaporator 160 serving as the evaporator.

The second heating mode as shown in FIG. 10 is a mode that operates in a condition where the outdoor temperature is below zero, and the outdoor heat exchanger 130 is circulated through the second bypass line R2 to minimize the influence of low temperature outdoor air. In this case, the refrigerant flowing through the first bypass line (R1) is branched through the branch line (R4) to recover the waste heat and the heat source of the indoor air of the vehicle electrical equipment 200 to improve the heating performance. The water-cooled heat exchanger 181 and the evaporator 160 will be supplied at the same time. Here, the indoor air is introduced into the air conditioning case 150 to control the internal air inflow mode to exchange heat with the evaporator 160.

In the dehumidification mode of the heat pump mode, as shown in FIG. 11, some of the refrigerant flowing through the second outlet pipe 174 of the receiver integrated accumulator 170 toward the first bypass line R1 is a water-cooled heat exchanger. The waste heat of the vehicle electronics 200 is recovered while passing through 181, and a part of the waste heat passes through the evaporator 160 serving as an evaporator.

The dehumidification mode as shown in FIG. 11 is a mode that operates under the condition that the outdoor temperature is an image, and the refrigerant passing through the outdoor heat exchanger 130 to recover the heat source of the outdoor air and the waste heat of the vehicle electrical equipment 200 is first-passed. Passing through the pass line (R1) passes through the water-cooled heat exchanger (181), at this time evaporator 160 that serves as an evaporator by branching some of the refrigerant flowing through the first bypass line (R1) through the branch line (R4). By supplying to the air to dehumidify the air flowing inside the air conditioning case 150.

In the defrost mode of the heat pump mode, the refrigerant flows to the first expansion means 140 through the first outlet pipe 173 of the receiver integrated accumulator 170 as shown in FIG. Some of the refrigerant passing through the expansion means 140 passes through the evaporator 160 which serves as an evaporator, and part of the refrigerant passes through the water-cooled heat exchanger 181 to recover the waste heat of the vehicle electronics 200.

The defrost mode shown in FIG. 12 is a mode for defrosting the outdoor heat exchanger 130 which serves as an evaporator when operating in the first heating mode as shown in FIG. 9, and operates the refrigerant in the air conditioner mode as shown in FIG. 8. The high temperature refrigerant is supplied to the heat exchanger 130 to be defrosted. At this time, after passing through the outdoor heat exchanger 130, a part of the refrigerant passing through the first expansion means 140 is branched through the branch line R4. By supplying the water-cooled heat exchanger 181, the performance of the evaporator 160 serving as the evaporator is reduced, thereby minimizing the temperature change of the indoor air during the defrost mode operation.

In addition, the water-cooled heat exchanger 181, which is a heat supply unit 180 provided on the first bypass line R1, is located in a refrigerant flow direction of the first bypass line R1 than the branch line R4. It is installed on the downstream side.

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

As described above, the present invention recovers the waste heat of the vehicle electrical equipment 200 and the heat source of the outdoor air under the condition that the outdoor temperature is an image, and the waste heat of the vehicle electrical equipment 200 and the heat source of the indoor air when the outdoor temperature is below zero. In addition to the recovery, the heat pump mode is the first heating mode (Fig. 3, Fig. 9), the second heating mode (Fig. 4, Fig. 10), dehumidification mode (Fig. 5, Fig. 11), defrost mode (Fig. 6, As shown in Figure 12, by varying the mode according to the heat load and purpose, to improve the efficiency of the heat pump system to maintain the heating performance, to minimize the operation of the electric heating heater 115, the vehicle (electric vehicle or hybrid vehicle) In addition, the effect of increasing the mileage can be obtained.

Hereinafter, the operation of the vehicle heat pump system according to the present invention will be described, and for convenience, it will be described based on the case where the heat supply means 180 is installed.

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

In the air conditioner mode, as illustrated in FIG. 8, the first bypass line is controlled by controlling the first, second, third and fourth on-off valves 195, 196, 197 and 198 and the first and second directional valves 191 and 192. The R1, the second bypass line R2, the expansion line R3, and the branch line R4 are all closed.

In addition, the coolant directional valve 230 closes the coolant bypass line W1 and circulates through the water pump 220 to cool the vehicle electrical equipment 200 and the water cooling radiator while circulating the vehicle electrical equipment 200. 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 directly closed to the outdoor heat exchanger 130 without heat exchange with air since the temperature control door 151 closes the passage of the indoor heat exchanger 110 as shown in FIG. 8. Will flow.

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 passing through the outdoor heat exchanger 130 flows into the receiver integrated accumulator 170, and the gaseous phase refrigerant and the liquid phase refrigerant are separated up and down by the first on / off valve 195. The liquid refrigerant is discharged through the opened first outlet pipe 173 to pass through the first expansion means 140.

The refrigerant passing through the first expansion means 140 is expanded under reduced pressure to become a low temperature 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.

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

On the other hand, the air conditioner mode when the heat supply means 180 is not installed, as shown in Figure 2, the refrigerant circulation process is the same.

I. First heating mode of heat pump mode

The first heating mode of the heat pump mode operates under conditions where the outdoor temperature is an image, and uses waste heat of the outdoor air and the vehicle electronics 200 as a heat source. As shown in FIG. 9, the first, second, third, Through the control of four on-off valves 195, 196, 197, 198, and first and second directional valves 191, 192, the first bypass line R1 is opened and the branch line R4 is closed to close the first The refrigerant is not supplied to the expansion means 140 and the evaporator 160 side.

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

On the other hand, the cooling water direction switching valve 230 opens the cooling water bypass line (W1), the cooling water circulated through the water pump 220 passes through the vehicle electrical equipment 200, the water-cooled heat exchanger ( 181 flows to the cooling water heat exchanger 181b and continues to circulate. At this time, the coolant heated by the vehicle electronics 200 flows to the coolant 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 operates to close a passage that bypasses the indoor heat exchanger 110 (condenser), and the air conditioning case 150 is opened by a blower. After the air blown into the evaporator 160 passes through the indoor heat exchanger 110, the air is changed into warm air and supplied into the vehicle compartment, thereby heating the vehicle interior.

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 to the expansion line R3, and the refrigerant flowing to the expansion line R3 passes through the second expansion means 120. After expansion under reduced pressure to a low temperature low pressure state, it is supplied to the outdoor heat exchanger (130).

The refrigerant supplied to the outdoor heat exchanger (130) evaporates while exchanging heat with outdoor air, and then flows into the receiver integrated accumulator (170), where the gas phase refrigerant and the liquid refrigerant are separated up and down, wherein the second on-off The gaseous refrigerant is discharged through the second outlet pipe 174 opened by the valve 196 to pass through the first bypass line R1.

The refrigerant passing through the first bypass line R1 exchanges heat with the cooling water passing through the cooling water heat exchanger 181b in a process of passing through the refrigerant heat exchanger 181a of the water-cooled heat exchanger 181, thereby obtaining a vehicle electrical component ( After recovering the waste heat of the 200, it is introduced into the compressor 100 to recycle the cycle as described above.

On the other hand, the first heating mode of the heat pump mode when the heat supply means 180 is not installed, as shown in Figure 3, the refrigerant circulation process is the same.

All. Second heating mode of heat pump mode

The heating mode of the heat pump mode is a mode in which the outdoor temperature is operated at a temperature of minus zero and uses indoor air (inflow mode) and waste heat of the vehicle electronics 200 as a heat source, as shown in FIG. The first bypass line R1 and the branch line R4 are opened through the control of the 3,4 on / off valves 195, 196, 197, 198 and the first and second directional valves 191,192.

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

In addition, the cooling water directional valve 230 opens the cooling water bypass line (W1), the cooling water circulated through the water pump 220 passes through the vehicle electrical equipment 200, the water-cooled heat exchanger ( 181 flows to the cooling water heat exchanger 181b and continues to circulate. At this time, the coolant heated by the vehicle electronics 200 flows to the coolant heat exchanger 181b of the water-cooled heat exchanger 181.

On the other hand, if the vehicle interior temperature is an image condition, the air inflow mode of the air conditioning case 150 is controlled to the air inflow mode is the indoor air flows into the air conditioning case 150.

In the second 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, and is blown into the air conditioning case 150 by a blower. After the air passes through the evaporator 160 and passes through the indoor heat exchanger 110, the air is converted into warm air and supplied into the vehicle compartment, thereby heating the interior of the vehicle compartment.

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 low temperature outdoor air is minimized.

Thereafter, the refrigerant passing through the second bypass line R2 flows into the receiver integrated accumulator 170 to separate the gaseous phase refrigerant and the liquid phase refrigerant up and down, and to the second on / off valve 196. The gaseous refrigerant is discharged through the second outlet pipe 174 opened by the gas and passes through the first bypass line R1.

Subsequently, some of the refrigerant passing through the first bypass line R1 may pass through the cooling water heat exchanger 181b while 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, part is supplied to the evaporator 160 through the branch line (R4) to evaporate in the process of heat exchange with the indoor air flowing inside the air conditioning case 150 Done.

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.

On the other hand, the second heating mode of the heat pump mode when the heat supply means 180 is not installed, as shown in Figure 4, the difference between the refrigerant circulation process, the second outlet pipe of the receiver integrated accumulator 170 ( The refrigerant discharged through 174 is supplied to the evaporator 160 through both the first bypass line R1 and the branch line R4.

la. Dehumidification mode of heat pump mode

The dehumidification mode of the heat pump mode operates under the condition that the outdoor temperature is an image, and uses the waste heat of the outdoor air and the vehicle electrical appliance 200 as a heat source. As shown in FIG. It will work if room dehumidification is required.

Therefore, only parts different from the first heating mode of FIG. 9 will be described.

In the dehumidification 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 passing 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), so that the gaseous phase refrigerant and the liquid phase refrigerant are charged. In this case, the gaseous refrigerant is discharged through the second outlet pipe 174 opened by the second on / off valve 196 to pass through the first bypass line R1.

Some of the refrigerant passing through the first bypass line R1 may exchange heat with the cooling water passing through the cooling water heat exchanger 181b while passing through the refrigerant heat exchanger 181a of the water-cooled heat exchanger 181. Evaporated while recovering the waste heat of the electrical equipment 200, a part is supplied to the evaporator 160 through the branch line (R4) is 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.

On the other hand, the dehumidification mode of the heat pump mode when the heat supply means 180 is not installed, as shown in Figure 5, the difference between the refrigerant circulation process, the second outlet pipe 174 of the receiver integrated accumulator 170 The refrigerant discharged through the first and second refrigerant lines are supplied to the evaporator 160 through the first bypass line R1 and the branch line R4.

hemp. Defrost mode in heat pump mode

The defrost mode of the heat pump mode operates under the condition that the outdoor temperature is an image, and uses waste heat of the outdoor air and the vehicle electronics 200 as a heat source, as shown in FIG. Freezing will work when defrost is needed.

In the defrost mode, when the outdoor heat exchanger 130 needs to be defrosted during operation in the first heating mode of FIG. 9, the refrigerant is operated in the air conditioner mode of FIG. 8 to supply the high temperature refrigerant to the outdoor heat exchanger 130. Supply and defrost.

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, and only the refrigerant is operated in the air conditioner mode of FIG. 8, and further comprising the third on / off valve ( The branch line R4 is opened through 197.

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

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

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 to defrost the outdoor heat exchanger 130.

Subsequently, the refrigerant passing through the outdoor heat exchanger 130 flows into the receiver integrated accumulator 170, and the gaseous phase refrigerant and the liquid phase refrigerant are separated up and down by the first on / off valve 195. The liquid refrigerant is discharged through the opened first outlet pipe 173 to pass through the first expansion means 140.

After the refrigerant passing through the first expansion means 140 is expanded under reduced pressure to become a low temperature low pressure state, the refrigerant is supplied to the evaporator 160, where some of the refrigerant discharged from the first expansion means 140 is It 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 air blown into the air conditioning case 150 through a blower, and the refrigerant supplied to the first bypass line R1 is the water-cooled heat exchanger 181. Heat exchange 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 evaporation to recover waste heat of the vehicle electrical equipment 200.

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.

On the other hand, the defrost mode of the heat pump mode when the heat supply means 180 is not installed, as shown in Figure 6, the difference between the refrigerant circulation process, the refrigerant discharged from the first expansion means 140 is the branch line All of them are supplied to the evaporator 160 without branching to R4.

100: compressor 110: indoor heat exchanger
115: electric heating heater 120: second expansion means
130: outdoor heat exchanger 140: first expansion means
150: air conditioning case 151: temperature control door
160: evaporator 170: receiver integrated 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;
Installed in the air conditioning case 150 and connected to the refrigerant circulation line R of the outlet side of the compressor 100, the air flowing in the air conditioning case 150 and the refrigerant discharged from the compressor 100 are provided. An indoor heat exchanger (110) for exchanging heat,
Installed in the air conditioning case 150 and connected to the refrigerant circulation line R of the inlet side of the compressor 100, the air flowing in the air conditioning case 150 is supplied to the compressor 100. An evaporator 160 for heat-exchanging the refrigerant,
An outdoor heat exchanger (130) installed outside the air conditioning case (150) to heat exchange the outdoor air with the refrigerant circulating through the refrigerant circulation line (R);
A first expansion means (140) installed on an inlet refrigerant circulation line (R) of the evaporator (160) to expand the refrigerant supplied to the evaporator (160);
The refrigerant passing through the outdoor heat exchanger 130 is installed to connect the inlet refrigerant circulation line R of the first expansion means 140 and the outlet 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;
The agent 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) to expand the refrigerant flowing through the expansion line (R3). 2 expansion means 120,
It is installed at the branch point of the first bypass line (R1) and the refrigerant circulation line (R), serves as a receiver for discharging the liquid refrigerant in the air conditioning mode, and discharges the gas phase refrigerant in the heat pump mode A vehicle heat pump system comprising an accumulator integrated accumulator (170) that serves as an accumulator. The method of claim 1,
The receiver integrated accumulator 170,
The main body 171 and the gaseous refrigerant and the liquid refrigerant are separated and stored up and down therein,
An inlet pipe 172 connecting the main body 171 and 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;
A vehicle heat pump system comprising a second outlet pipe (174) connected to the main body (171) and the first bypass line (R1) for discharging gaseous refrigerant in the main body (171). 3. The method of claim 2,
A first on-off valve 195 is provided on the inlet refrigerant circulation line R of the first outlet pipe 173 or the first expansion means 140, and the second outlet pipe 174 or the first outlet pipe 173 is provided. The second on-off valve 196 is installed on the first bypass line R1,
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 conditioner mode or the heat pump mode. Automotive heat pump system. 3. The method of claim 2,
The inlet pipe 172 is installed to communicate with the gas phase refrigerant region of the main body 171,
The first outlet pipe 173 is installed to communicate with the liquid refrigerant region of the main body 171,
The second outlet pipe 174 is installed to communicate with the gas phase refrigerant region of the main body 171, the vehicle heat pump system. The method of claim 1,
At the branch point of the expansion line R3 and the refrigerant circulation line R, the refrigerant discharged from the indoor heat exchanger 110 bypasses or expands the expansion line R3 according to an air conditioner mode or a heat pump mode. The vehicle heat pump system, characterized in that the first direction switching valve (191) for changing the flow direction of the refrigerant to pass through the line (R3). The method of claim 1,
In the refrigerant circulation line R, a second bypass line R2 is provided in parallel so that refrigerant circulating in the refrigerant circulation line R bypasses the outdoor heat exchanger 130.
Flow direction of the refrigerant to flow to the outdoor heat exchanger 130 or the second bypass line (R2) in accordance with the outdoor temperature at the branch point of the second bypass line (R2) and the refrigerant circulation line (R) Vehicle heat pump system, characterized in that the second direction switching valve 192 is installed to switch. The method of claim 1,
Some of the refrigerant flowing in the first bypass line R1 flows toward the evaporator 160 or some of the refrigerant discharged from the first expansion means 140 passes through the first bypass line R1. A branch line R4 connecting the outlet refrigerant circulation line R and the first bypass line R1 of the first expansion means 140 is installed to flow to the side.
The third on-off valve (197) is installed on the branch line (R4) characterized in that the vehicle heat pump system. The method of claim 1,
On the first bypass line (R1), the vehicle heat pump system, characterized in that the heat supply means for supplying heat to the refrigerant flowing along the first bypass line (R1) (180). The method of claim 8,
The heat supply unit 180 is a refrigerant heat exchanger through which the refrigerant flowing through the first bypass line R1 flows to supply the waste heat of the vehicle electronics 200 to the refrigerant flowing through the first bypass line R1. A water-cooled heat exchanger 181 including a portion 181a and a coolant heat exchanger 181b provided at one side of the refrigerant heat exchanger 181a and having a coolant circulating in the vehicle electrical equipment 200 flows therethrough. Vehicle heat pump system, characterized in that made. The method of claim 9,
The heat supply means 180,
Cooling water circulation line (W) having a water pump 220 to circulate the cooling water in the vehicle electrical equipment 200,
A water cooling radiator 210 installed on the cooling water circulation line W to heat-exchange outdoor air and cooling water circulating in the cooling water circulation line W;
By connecting the cooling water circulation line (W) and the cooling water heat exchanger (181b) of the water-cooled heat exchanger (181) in parallel, the cooling water passing through the electrical equipment 200 through the water pump 220 is the water-cooled radiator ( A coolant bypass line W1 for bypassing 210 to flow to the coolant heat exchanger 181b;
The cooling water bypass line (W1) and the cooling water circulation line (W) is installed at a branch point made of a cooling water direction switching valve 230 for switching the flow direction of the cooling water in accordance with the air conditioning mode or heat pump mode A vehicle heat pump system. The method of claim 1,
The evaporator 160 and the indoor heat exchanger 110 are installed to be spaced apart from each other in the interior of the air conditioning case 150, and the evaporator 160 and the evaporator 160 from an upstream side of the air flow direction in the air conditioning case 150. Vehicle heat pump system, characterized in that the indoor heat exchanger 110 is installed sequentially.

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