KR20130057083A - Heat pump system for vehicle - Google Patents

Abstract

PURPOSE: A heat pump system for a vehicle is provided to perform an accumulator role in a heat pump mode and a liquid receiver role in an air conditioning mode by installing a liquid receiver integrated accumulator including one inlet pipe and two outlet pipes on a refrigerant circulation line. CONSTITUTION: A heat pump system for a vehicle comprises a refrigerant circulation line(R) and a liquid receiver integrated accumulator(170). The liquid receiver integrated accumulator comprises a body(171), an inlet pipe(172), a first outlet pipe(173), and a second outlet pipe(174). The body vertically separates and stores a gas refrigerant and a liquid refrigerant. The inlet pipe is connected to one side of the body so that the refrigerant circulated in the refrigerant circulation line flows in. The first outlet pipe is connected to a liquid refrigerant section(B) in the body in order to discharge the liquid refrigerant in the body. The second outlet pipe is connected to a gas refrigerant section(A) in the body in order to discharge the gas refrigerant in the body.

Description

[0001] Heat pump system for vehicle [0002]

The present invention relates to a heat pump system for a vehicle, and more particularly, a liquid receiver integrated accumulator having one inlet pipe and two outlet pipes is installed on a refrigerant circulation line, and the liquid solution discharges liquid refrigerant in the air conditioner mode. The present invention relates to a vehicle heat pump system configured to serve as an accumulator for discharging gaseous refrigerant in the 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 having one inlet pipe and two outlet pipes on the refrigerant circulation line, and serves as a receiver for discharging liquid refrigerant in the air conditioner mode. In addition, by acting as an accumulator to discharge gaseous refrigerant in the heat pump mode, the function of the accumulator and accumulator, which was previously configured separately in the heat pump system, can be integrated into one, thereby reducing the number of parts and thereby reducing the manufacturing cost. In addition, by controlling the flow direction of the refrigerant in accordance with the air conditioning mode or the heat pump mode through the on-off valve provided on the two outlet pipe side can perform various modes in the heat pump system as well as improve the heating performance. To provide a vehicle heat pump system that can be.

The present invention for achieving the above object, the refrigerant circulation line, and the accumulator integrated accumulator for connecting and installed on the refrigerant circulation line and separating and discharging the refrigerant circulating through the refrigerant circulation line into a gas phase refrigerant and a liquid refrigerant In the vehicle heat pump system comprising a, the receiver integrated accumulator, the main body and the gaseous refrigerant and liquid refrigerant is separated into the upper and lower stores therein, and one side of the main body so that the refrigerant circulating the refrigerant circulation line flows in An inlet pipe connected to the first outlet pipe connected to the liquid refrigerant region in the main body to discharge the liquid refrigerant in the main body and a gaseous refrigerant region in the main body to discharge the gas phase refrigerant in the main body. Characterized in that it comprises a second outlet pipe that is made.

According to the present invention, a receiver integrated accumulator having one inlet pipe and two outlet pipes is installed on a refrigerant circulation line, and serves as a receiver for discharging liquid refrigerant in an air conditioner mode, and a gas phase in a heat pump mode. By acting as an accumulator for discharging the refrigerant, the function of the accumulator and the accumulator previously configured separately in the heat pump system can be integrated into one, thereby reducing the number of parts and thus reducing the manufacturing cost.

In addition, through the on-off valves provided at the two outlet pipes of the receiver integrated accumulator, it is possible 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 and improve the heating performance. can do.

And, by installing a heater to heat the refrigerant inside the main body, it is possible to increase the suction pressure of the compressor at low temperatures, increase the delay delay and heating performance.

In addition, by installing the auxiliary dome plate at a position lower than one end of the second outlet pipe located in the main body, even if bubbles are generated and raised by the operation of the heater is blocked by the auxiliary dome plate through the second outlet pipe The liquid refrigerant can be prevented from being supplied to the compressor side.

And, by forming a siphon hole on the second outlet pipe, it is possible to prevent the siphon action of the liquid refrigerant in the main body to rise along the second outlet pipe when the system off, and occurs when the liquid refrigerant is supplied into the compressor It also solves possible slugging problems.

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 cross-sectional view illustrating a case in which an inlet pipe is formed on an upper side of a main body in the receiver integrated accumulator of FIG. 7;
FIG. 9 is a cross-sectional view illustrating a case in which the first outlet pipe is formed on the lower side of the main body in the receiver integrated accumulator of FIG. 7; FIG.
FIG. 10 is a cross-sectional view illustrating a case in which the first outlet pipe is integrally formed with the second outlet pipe in the receiver integrated accumulator of FIG. 7.

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 FIG. 2, 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. In this case, the evaporator 160 and the compressor 100 are sequentially cycled. In this case, 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), the refrigerant discharged from the compressor 100 as shown in Figure 3 is the indoor heat exchanger 110, the second expansion means 120, the outdoor heat exchanger 130, the fluid The integrated accumulator 170, the first bypass line (R1), and the compressor 100 are sequentially circulated, wherein the indoor heat exchanger 110 serves as a condenser (heater) and the outdoor 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 FIG. 3, the fluid 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 flowed 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 FIG. 5, 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. Part of the refrigerant flowing into the first bypass line R1 through the integrated accumulator 170 and flowing into the first bypass line R1 is circulated to the compressor 100, and a part of the branch line ( After bypassing the first expansion means 140 through R4) it is made to circulate to the compressor 100 via the evaporator 160.

In the defrost mode, as shown in FIG. 6, the refrigerant discharged from the compressor 100 passes through the indoor heat exchanger 110 and the outdoor heat exchanger 130, and then passes through the receiver integrated accumulator 170. The refrigerant is introduced into the first expansion means 140 and expanded, and the refrigerant expanded in the first expansion means 140 circulates through the evaporator 160 to the compressor 100.

In the second heating mode, as shown in FIG. 4, after 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 to bypass the outdoor heat exchanger (130), and the refrigerant passing through the second bypass line (R2) passes through the receiver integrated accumulator (170) to the first bypass line (R1). After the first expansion means 140 is bypassed through the branching line R4, the first expansion means 140 is circulated to the compressor 100 through the evaporator 160.

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 FIG. 2, the low temperature low pressure refrigerant discharged from the first expansion means 140 is supplied to the evaporator 160, at which time a blower (not shown) In the process of passing through the evaporator 160, the air flowing through the air conditioning case 150 through heat exchange with the low temperature low-pressure refrigerant inside the evaporator 160 is converted into cold air, discharged to the vehicle interior is discharged into the vehicle interior Cooled.

In the heat pump mode in which the indoor heat exchanger 110 serves as a condenser (heater), as shown in FIG. 3, the high temperature and high pressure refrigerant discharged from the compressor 100 is supplied to the indoor heat exchanger 110. At this time, the air flowing inside the air conditioning case 150 through the blower (not shown) is changed to the warm air by heat exchange 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. Afterwards, 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 side passage of the indoor heat exchanger 110 through the temperature control door 151 as shown in FIG. 2, the cold air passing through the evaporator 160 serving as the evaporator is indoor heat exchange. Since the air is supplied to the vehicle interior by bypassing the machine 110, the maximum cooling is performed, and in the heat pump mode (in the first heating mode), the indoor heat exchanger 110 through the temperature control door 151 as shown in FIG. By completely closing the passage bypassing), all the air passes through the indoor heat exchanger 110 serving as a condenser (heater) and is converted into warm air, and the warm air is supplied into the vehicle cabin, thereby performing the maximum heating.

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 ( 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.

The receiver integrated accumulator 170, as shown in Figure 7, the gaseous refrigerant and the liquid refrigerant is stored in the upper and lower separated inside, the body 171 and the refrigerant circulating in the refrigerant circulation line (R) flows in An inlet pipe 172 connected to one side of the main body 171 and a first outlet pipe connected to communicate with the liquid refrigerant region B in the main body 171 to discharge the liquid refrigerant in the main body 171. 173 and a second outlet pipe 174 connected to communicate with the gas phase refrigerant region A in the body 171 to discharge the gas phase refrigerant in the body 171.

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.

The inlet pipes 172 and the first and second outlet pipes 173 and 174 may be installed at various positions of the main body 171 as shown in FIGS. 7 to 10.

First, the inlet pipe 172 is connected to be installed to communicate with the gas phase refrigerant region (A) in the main body 171, as shown in Figure 8 may be installed in a vertical direction connected to the upper side of the main body 171 Alternatively, as shown in FIG. 7, the outer peripheral surface (side surface) of the main body 171 may be installed in a horizontal direction.

At this time, since the gaseous refrigerant is stored in the upper portion of the main body 171, it is preferable to connect the inlet pipe 172 to the upper side of the outer peripheral surface of the main body 171.

In addition, the first outlet pipe 173 is connected to be in communication with the liquid refrigerant region B in the main body 171, and as shown in FIG. 7 in the horizontal direction on the outer circumferential surface (side surface) of the main body 171. It is connected to the installation, in consideration of the assembly tolerance may be installed spaced apart from the bottom surface in the main body 171, or as shown in Figure 9 may be installed in a vertical direction connected to the lower side of the main body 171.

At this time, since the liquid refrigerant is stored in the lower portion of the main body 171, when the first outlet pipe 173 is connected to the outer peripheral surface of the main body 171, it is preferable to connect to the lower side of the outer peripheral surface of the main body 171. Do.

In addition, the first outlet pipe 173 is provided with a foreign matter removal filter 173a to remove foreign substances contained in the liquid refrigerant discharged through the first outlet pipe 173.

The second outlet pipe 174 is connected to communicate with the gas phase refrigerant region A in the main body 171, and is bent in a “U” shape as illustrated in FIG. 7 to prevent the second outlet pipe 174 from being connected to the main body 171. Is inserted into the installation, one end is formed to extend in communication with the gas phase refrigerant region (A) and the other end is formed to extend through the upper side of the main body 171 to the outside of the main body 171.

That is, the portion of the second outlet pipe 174 inserted into the main body 171 is bent in a “U” shape, so that the end portion thereof extends to the gas phase refrigerant region A in the main body 171, so that the gas phase refrigerant region Communicate with (A).

At this time, the bending portion 174a of the second outlet pipe 174 is preferably installed to be immersed in the liquid refrigerant in the main body 171.

In addition, in the banding portion 174a of the second outlet pipe 174, oil contained in the liquid refrigerant in the main body 171 is recovered into the second outlet pipe 174 to be discharged together with the gaseous refrigerant. The recovery filter 175 is installed.

The oil recovery filter 175 communicates with the inside of the bending portion 174a of the second outlet pipe 174, where only oil contained in the liquid refrigerant passes through the oil recovery filter 175 to the second outlet. It is introduced into the pipe (174).

The oil introduced into the second outlet pipe 174 is discharged together with the gaseous refrigerant flowing through the second outlet pipe 174 and supplied to the compressor 100, so that the compressor 100 can operate smoothly. Done.

On the other hand, the oil recovery filter 175 is preferably installed to be spaced apart from the bottom surface and the predetermined interval (L) in the main body 171 in consideration of the assembly tolerance, thereby preventing the interference problem in the assembly process.

At this time, the interval L between the bottom surface of the main body 171 and the oil recovery filter 175 is preferably maintained about 2mm.

In addition, on the second outlet pipe 174 located in the gas phase refrigerant region A, a siphon hole 179 is provided to prevent the liquid refrigerant from rising through the second outlet pipe 174 when the system is turned off. Is formed.

That is, when the system is turned off, the liquid refrigerant filled in the main body 171 may rise through the second outlet pipe 174 and be supplied to the compressor 100, wherein the liquid refrigerant may be supplied to the compressor 100. If supplied, slugging problems can occur. Therefore, in order to solve this problem, the siphon hole 179 is formed on the second outlet pipe 174, so that the liquid refrigerant in the main body 171 rises along the second outlet pipe 174 when the system is turned off. It is possible to prevent the operation of the funnel, it can also solve the slugging problem that may occur when the liquid refrigerant is supplied into the compressor (100).

Meanwhile, the first outlet pipe 173 may be integrally formed on one side of the second outlet pipe 174 by vertically penetrating the upper surface of the main body 171 as shown in FIG. 10.

At this time, one end of the first outlet pipe 173 is preferably extended to communicate with the liquid refrigerant region B in the main body 171, the other end is preferably formed to extend to the outside of the main body 171.

In the receiver integrated accumulator 170, the inlet pipe 172 is connected to the outlet refrigerant circulation line R of the outdoor heat exchanger 130, and the first outlet pipe 173 is connected to the first outlet pipe 173. It is connected to the inlet refrigerant circulation line (R) of the expansion means 140, the second outlet pipe 174 is connected to the first bypass line (R1), in the air conditioning mode the first outlet pipe ( The liquid refrigerant is discharged to the first expansion means 140 through 173, and the gaseous refrigerant is discharged to the first bypass line R1 through the second outlet pipe 174 in the heat pump mode.

In addition, a first on-off valve 195 is installed on the first outlet pipe 173 side, and a second on-off valve 196 is installed on the second outlet pipe 174 side. The liquid refrigerant is discharged through the first outlet pipe 173 to be supplied to the first expansion means 140, and in the heat pump mode, the gaseous refrigerant is discharged through the second outlet pipe 174 to bypass the first bypass. It can be controlled to supply to the line R1 side.

The first on-off valve 195 may be installed on an inlet refrigerant circulation line R of the first expansion means 140 connected to the first outlet pipe 173 or the second on-off valve 195. The off valve 196 may be installed on the first bypass line R1 connected to the second outlet pipe 174.

As such, 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 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, the inside of the main body 171 is located within the main body 171 to prevent the liquid refrigerant of the refrigerant flowing through the inlet pipe 172 to flow directly into the second outlet pipe 174. A dome plate 176a is installed between one end of the two outlet pipes 174 and the inlet pipe 172.

The dome plate 176a is fixed to the side of the second outlet pipe 174 and partitions one end of the inlet pipe 172 and the second outlet pipe 174 to thereby separate the inlet pipe 172. The refrigerant introduced into the main body 171 is prevented from immediately flowing into the second outlet pipe 174, and only the gaseous refrigerant can be introduced into the second outlet pipe 174.

In addition, a heater 178 is installed inside the main body 171 to heat the refrigerant in the main body 171.

The heater 178 heats the refrigerant in the main body 171, thereby increasing the suction pressure of the compressor at low temperatures, and increasing the delay delay and the heating performance.

At this time, inside the main body 171, bubbles generated during the operation of the heater 178 flows into the second outlet pipe 174 to prevent the liquid refrigerant from being supplied to the compressor side, the main body 171 The auxiliary dome plate 176b is installed at a position lower than one end of the second outlet pipe 174 located therein.

Therefore, even if bubbles are generated and raised by the operation of the heater 178, the auxiliary dome plate 176b is blocked by the auxiliary outlet pipe 174, thereby preventing the liquid refrigerant from being supplied.

In addition, a desiccant 177 is installed in the main body 171 to remove moisture contained in the refrigerant 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, 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.

Meanwhile, a heat supply unit (not shown) may be installed on the first bypass line R1 to supply heat to the refrigerant flowing along the first bypass line R1.

The heat supply means is for supplying the waste heat of the vehicle electrical equipment to the refrigerant flowing through the first bypass line (R1), the water-cooled heat exchanger for mutual heat exchange between the cooling water circulating the vehicle electronics and the refrigerant flowing through the first bypass line It consists of

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

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

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

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

In the air conditioner mode, as shown in FIG. 2, the first bypass line R1 is controlled through the control of the first, second and third on-off valves 195, 196, 197 and the first and second directional valves 191 and 192. ), The second bypass line R2, the expansion line R3, and the branch line R4 are all closed.

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 supplied to the outdoor heat exchanger 130 without heat exchange with 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 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.

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

I. First heating mode of heat pump mode

Among the heat pump modes, the first heating mode is a mode in which the outdoor temperature is an image and uses outdoor air as a heat source. As shown in FIG. 3, the first, second, third on-off valves 195, 196, 197, and first Through the control of the two-way switching valve (191, 192), the first bypass line (R1) is opened and the branch line (R4) is closed, the first expansion means 140 and the evaporator 160 The coolant is not supplied to the side.

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

In the first 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 the 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 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 is introduced into the compressor 100 to recycle the cycle as described above.

All. Second heating mode of heat pump mode

4, the first, second and third on-off valves 195, 196, and 197 operate in a mode in which the outdoor temperature is zero and the room air (inflow inflow mode) is used as a heat source. The first bypass line R 1 and the branch line R 4 are opened through the control of the first and second directional control valves 191 and 192.

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

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, the refrigerant passing through the first bypass line R1 is supplied to the evaporator 160 through the branch line R4 to evaporate during heat exchange with indoor air flowing through the air conditioning case 150. Done.

Thereafter, the refrigerant passing through the evaporator 160 is introduced into the compressor 100 to recycle the cycle as described above.

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 outdoor air as a heat source. As shown in FIG. 5, the dehumidification mode is operated when the indoor dehumidification is required while operating in the first heating mode of FIG. 3. do.

Therefore, only the portions different from the first heating mode of FIG. 3 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.

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.

The refrigerant passing through the first bypass line (R1) is supplied to the evaporator 160 through the branch line (R4) to evaporate 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.

Thereafter, the refrigerant passing through the evaporator 160 is introduced into the compressor 100 to recycle the cycle as described above.

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 outdoor air as a heat source. As shown in FIG. 6, when defrost is needed due to an accumulation problem (freezing) of the outdoor heat exchanger 130. To work.

When the defrosting operation of the outdoor heat exchanger 130 is required during operation in the first heating mode of FIG. 3, the defrosting mode operates the refrigerant in the air conditioner mode of FIG. 2 to cool the high-temperature refrigerant to the outdoor heat exchanger 130 And then discharged.

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.

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.

The refrigerant passing through the first expansion means 140 is expanded under reduced pressure to become a low temperature low pressure state, and then is supplied to the evaporator 160.

The refrigerant supplied to the evaporator 160 is evaporated by heat exchange with air blown into the air conditioning case 150 through a blower.

Thereafter, the refrigerant passing through the evaporator 160 is introduced into the compressor 100 to recycle the cycle as described above.

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 173a: foreign material removal filter
174: second outlet pipe
175: oil recovery filter 176a: dome plate
176b: auxiliary dome plate 177: desiccant
178: heater 179: siphon hole
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
R: Refrigerant circulation line R1: First bypass line
R2: second bypass line R3: inflation line
R4: Branch Line

Claims (16)

A receiver integrated accumulator 170 connected to the refrigerant circulation line R and the refrigerant circulation line R, and separating and discharging the refrigerant circulating through the refrigerant circulation line R into a gaseous phase refrigerant and a liquid phase refrigerant. In the vehicle heat pump system comprising a,
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 connected to one side of the main body 171 so that refrigerant circulating in the refrigerant circulation line R flows in;
A first outlet pipe 173 connected to communicate with the liquid refrigerant region B in the main body 171 to discharge the liquid refrigerant in the main body 171;
And a second outlet pipe (174) connected to communicate with the gas phase refrigerant region (A) in the body (171) to discharge the gas phase refrigerant in the body (171). The method of claim 1,
A heat pump system for a vehicle, characterized in that a heater (178) is installed inside the main body (171) to heat the refrigerant in the main body (171). The method of claim 1,
The inlet pipe 172 is connected to communicate with the gas phase refrigerant region (A) in the main body 171, the vehicle heat pump system, characterized in that the connection is installed on the upper side of the main body (171). The method of claim 1,
The inlet pipe 172 is connected to communicate with the gas phase refrigerant region (A) in the main body (171), the vehicle heat pump system, characterized in that the connection is installed on the outer peripheral surface of the main body (171). The method of claim 1,
The first outlet pipe (173) is connected to the outer circumferential surface of the main body 171, the vehicle heat pump system, characterized in that spaced apart from the bottom surface in the main body (171) by a predetermined interval. The method of claim 1,
The first outlet pipe (173) is connected to the lower surface of the main body (171), characterized in that the vehicle heat pump system. The method of claim 1,
The second outlet pipe 174 is bent into a “U” shape and inserted into the main body 171, one end of which extends to communicate with the gas phase refrigerant region A and the other end of the main pipe 174. A vehicle heat pump system, characterized in that extending through the upper side of the (171) to the outside of the main body (171) and the bending portion (174a) is installed to be immersed in the liquid refrigerant in the main body (171). The method of claim 7, wherein
The first outlet pipe 173 is formed integrally with one side of the second outlet pipe 174 by penetrating the upper surface of the main body 171, one end of the liquid refrigerant region B in the main body 171. Is formed to communicate with the other end, and the other end is formed to extend to the outside of the main body (171). The method of claim 7, wherein
An oil recovery filter for recovering oil contained in the liquid refrigerant in the main body 171 into the second outlet pipe 174 in the bending portion 174a of the second outlet pipe 174 to be discharged together with the gaseous refrigerant. 175 is installed,
The oil recovery filter 175 is a vehicle heat pump system, characterized in that installed in the main body 171 and the bottom surface spaced apart (L). 3. The method of claim 2,
Inside the main body 171, a second outlet located in the main body 171 to prevent the liquid refrigerant from the refrigerant flowing through the inlet pipe 172 directly flowing into the second outlet pipe 174. A dome plate (176a) is installed between one end of the pipe (174) and the inlet pipe (172). 3. The method of claim 2,
Inside the main body 171, the second outlet pipe 174 located in the main body 171 to prevent air bubbles generated during operation of the heater 178 from entering the second outlet pipe 174. An auxiliary dome plate (176b) is installed at a position lower than one end of the vehicle heat pump system. The method of claim 1,
A vehicle heat pump system, characterized in that a desiccant (177) is installed in the main body (171) to remove moisture contained in the refrigerant in the main body (171). The method of claim 1,
The first outlet pipe (173), the vehicle heat pump system, characterized in that the foreign material removal filter (173a) is installed to remove the foreign matter contained in the liquid refrigerant discharged through the first outlet pipe (173). The method of claim 1,
A first on-off valve 195 is provided on the first outlet pipe 173 side, and a second on-off valve 196 is installed on the second outlet pipe 174 side, and the first outlet in the air conditioner mode. Discharge the liquid refrigerant through the pipe (173), and in the heat pump mode, the vehicle heat pump system, characterized in that to control to discharge the gaseous refrigerant through the second outlet pipe (174). The method of claim 7, wherein
The siphon hole 179 is formed on the second outlet pipe 174 positioned in the gas phase refrigerant region A to prevent the liquid refrigerant from rising through the second outlet pipe 174 when the system is turned off. A vehicle heat pump system. The method of claim 1,
The vehicle heat pump system,
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). It comprises two expansion means 120,
The receiver integrated accumulator 170 is installed at a branch point of the first bypass line R1 and the refrigerant circulation line R, and the inlet pipe 172 is an outlet of the outdoor heat exchanger 130. It is connected to the side refrigerant circulation line (R), the first outlet pipe 173 is connected to the inlet refrigerant circulation line (R) of the first expansion means 140, the second outlet pipe 174 is It is connected to the first bypass line (R1),
In the air conditioner mode, the liquid refrigerant is discharged to the first expansion means 140 through the first outlet pipe 173, and the gaseous refrigerant is first bypassed through the second outlet pipe 174 in the heat pump mode. A vehicle heat pump system characterized by discharging to the line (R1) side.

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