KR200362729Y1 - Refrigerant cycle system - Google Patents

Abstract

The present invention relates to a refrigerant cycle system, so that the refrigerant is moved along the circulation path fed back to the expander through the expander, the indoor unit having an indoor heat exchanger, the compressor and the outdoor unit having an outdoor heat exchanger, so as to lower the temperature of the room, which is the cooling zone. In the configured refrigerant cycle system, the refrigerant condensed in the outdoor unit is introduced into the expander through a heat exchange circuit, a portion of the refrigerant flowing into the expander is adiabatic expansion in the auxiliary expander, the refrigerant discharged from the auxiliary expander and the indoor unit Refrigerant evaporated in the expander and then heat exchanged in the expander is mixed through the heat exchange circuit and supplied to the compressor, and heat generated in the compressor is absorbed by the evaporation of the heat medium circulated inside the heat pipe, and then discharged from the expander. Condensation in the low temperature refrigerant before entering the compressor It characterized by a discharged by the supply, according to which high heat is generated in the compressor discharge air into the low temperature coolant in such a configuration has an excellent effect of preventing the compressor efficiency is deteriorated or damaged by the high temperature.

Description

Refrigerant cycle system

The present invention relates to a refrigerant cycle system, and more particularly, to a refrigerant cycle system capable of releasing high heat generated in a compressor to a low temperature refrigerant using a heat pipe.

In general, the refrigerant cycle system absorbs heat from the temperature control zone by the phase change of the refrigerant circulated along a predetermined path and discharges it to the outside of the temperature control zone or, conversely, absorbs heat from the outside of the temperature control zone. It is configured to supply to perform cooling or heating.

At this time, when the cooling is performed, the refrigerant circulates the process of evaporation → compression → condensation → expansion → evaporation, and when heating is performed, the refrigerant circulates the process of evaporation → expansion → condensation → compression → evaporation.

Since such a refrigerant cycle system is usually set to a temperature control area or an air conditioning area (hereinafter, generally referred to as an indoor temperature control area), for convenience of description, the temperature control area is called 'indoor', and the outside of the temperature control area is called 'outdoor'. Cooling system configured to reduce the temperature of the heating), a heating system configured to increase the temperature of the room, and a cooling and heating system configured to lower or increase the temperature of the room according to the user's choice.

Most refrigerant cycle systems include indoor units arranged indoors, outdoor units arranged outdoors, compressors that take in low temperature low pressure refrigerant, compress them in a heat insulating state, and discharge them into high temperature high pressure refrigerant, and expand the high temperature high pressure refrigerant in a heat insulating state. An expander for discharging to a low pressure refrigerant, pipes for connecting the indoor unit, outdoor unit, compressor, and expander so that the refrigerant can be circulated in a predetermined path, sensors installed at a predetermined position selected in advance, and detecting the temperature and pressure of the refrigerant; And a control unit for supplying power to the compressor, the sensors, etc., and receiving information from the sensors to control the operation of the compressor. The air conditioning system further includes valves for changing the path of the refrigerant.

Hereinafter, the case where the room is cooled by the cooling system or the air-conditioning system and the case where the room is heated by the heating system or the air-conditioning system will be described in more detail.

First, in the case of cooling, in the indoor unit, the liquid refrigerant introduced at low temperature and low pressure is evaporated while taking heat away from the room, and then discharged to the compressor. In the compressor, the low-temperature, low-pressure gaseous refrigerant introduced from the indoor unit is compressed and discharged into the high-temperature, high-pressure gaseous refrigerant. In the outdoor unit, the gaseous refrigerant discharged from the compressor and introduced at a high temperature and high pressure is condensed into a liquid refrigerant having a high temperature and high pressure while dissipating heat to the outside and then discharged to the expander. The expander expands the high temperature and high pressure liquid refrigerant introduced from the outdoor unit to discharge the low temperature low pressure liquid refrigerant, and forms a circulation cycle in which the low temperature low pressure liquid refrigerant discharged from the expander flows into the indoor unit.

Next, in the case of heating, in the indoor unit, the gaseous refrigerant introduced at high temperature and high pressure condenses into a liquid refrigerant having high temperature and high pressure while dissipating heat into the room and then is discharged to the expander. In the expander, the high temperature and high pressure liquid refrigerant introduced from the indoor unit is expanded and discharged into the low temperature and low pressure liquid refrigerant. In the outdoor unit, the low-temperature, low-pressure liquid refrigerant introduced from the expander is evaporated while taking heat away from the outdoor, and then discharged to the compressor. In the compressor, the low-temperature low-pressure gaseous refrigerant introduced from the outdoor unit is compressed and discharged into the high-temperature, high-pressure gaseous phase refrigerant, and the high-temperature, high-pressure gaseous phase refrigerant discharged from the compressor forms a circulation cycle.

At this time, the compressor constituting the refrigerant cycle system is a case for providing a sealed inner space, a compression unit installed inside the case to compress and discharge the sucked refrigerant, and is installed inside the case to drive the compression unit It has a configuration including a drive unit, the high heat generated inside the compressor is discharged to the outside through the case.

However, the conventional refrigerant cycle system for discharging the high heat generated in the compressor to the outside through the casing constituting the compressor has the following problems.

First, there is a problem of lowering the overall efficiency of the refrigerant cycle system by releasing to the atmosphere without using the high heat generated in the compressor.

Second, when the surroundings of the compressor are high temperature, such as in summer, the compressor's high heat is not sufficiently discharged through the casing and accumulated in the compressor, which deteriorates and deteriorates the compression efficiency due to deformation and damage of the internal components constituting the compressor. Of course, there arises a problem of reducing the life of the compressor.

The present invention is to solve the above-mentioned conventional problems, an object of the present invention is to provide a refrigerant cycle system that can improve the thermal efficiency by supplying high temperature generated in the compressor to the low temperature refrigerant discharged to the atmosphere.

In addition, another object of the present invention is to provide a refrigerant cycle system capable of preventing the deterioration of the compressor by releasing high heat generated in the compressor sufficiently.

1 is a circuit diagram showing a first embodiment of a refrigerant cycle system according to the present invention;

2 is a circuit diagram showing a second embodiment of a refrigerant cycle system according to the present invention;

3 is a circuit diagram showing a third embodiment of a refrigerant cycle system according to the present invention;

4 is a circuit diagram showing a modification to the third embodiment of the present invention;

5 is a block diagram showing the structure of a compressor and a heat pipe used in a refrigerant cycle system according to the present invention;

6 is a plan sectional view showing the compressor of FIG.

7 is a cross-sectional view illustrating the structure of an indoor heat exchanger used in a refrigerant cycle system according to the present invention.

※ Explanation of symbols about main part of drawing ※

1: expander 2: indoor unit

20: indoor heat exchanger 22: refrigerant piping

24: insulation pipe 3: compressor

30 case 32 compression unit

34: drive unit 36: bypass euro

36a: flow control valve 4: outdoor unit

40: outdoor heat exchanger 5: heat pipe

52: evaporation unit 54: condensation unit

56 connection portion 7: heat exchange circuit

70 heat exchanger 8 auxiliary expander

90: four-way valve 91: refrigerant suction piping

92: refrigerant discharge pipe

As a technical configuration for achieving the above object, the present invention, the refrigerant is moved in the cooling zone while moving along the circulation path supplied back to the expander through an expander, an indoor unit having an indoor heat exchanger, an compressor and an outdoor unit having an outdoor heat exchanger. In the refrigerant cycle system configured to lower the temperature of the refrigerant, the refrigerant condensed in the outdoor unit is introduced into the expander through a heat exchange circuit, a portion of the refrigerant flowing into the expander is adiabatic expansion in the auxiliary expander, in the auxiliary expander The discharged refrigerant and the refrigerant heat-exchanged in the expander after being evaporated in the indoor unit are mixed through the heat exchange circuit and supplied to the compressor, and the heat generated by the compressor is absorbed by the evaporation of the heat medium circulating in the heat pipe. After discharge from the inflator and into the compressor It depends on the refrigerant of the refrigerant cycle system, characterized by the discharged condensate in maryeonham.

In addition, the present invention, the refrigerant cycle system configured to lower the temperature of the heating area while the refrigerant is moved along the circulation path supplied back to the expander through an expander, an outdoor unit having an outdoor heat exchanger, a compressor and an indoor unit having an indoor heat exchanger. The refrigerant condensed in the indoor unit flows into the expander through a heat exchange circuit, and a portion of the refrigerant flowing into the expander is adiabaticly expanded in the auxiliary expander, and evaporates from the refrigerant discharged from the auxiliary expander and the outdoor unit. Refrigerant heat exchanged in the expander is mixed through the heat exchange circuit and supplied to the compressor, and the heat generated in the compressor is absorbed by the evaporation of the heat medium circulated inside the heat pipe, and then discharged from the expander to enter the compressor. Characterized by being discharged by condensation into the low temperature refrigerant before By providing a refrigerant cycle system.

In addition, the present invention, the refrigerant consists of an expander, an indoor unit having an indoor heat exchanger, a compressor and an outdoor heat exchanger, and by circulating the refrigerant to reduce or increase the indoor control temperature by using the state change of the refrigerant. In the refrigerant cycle system of the air conditioner, the refrigerant condensed in the outdoor unit or the indoor unit is introduced into the expander through a heat exchange circuit, a portion of the refrigerant flowing into the expander is adiabatic expansion in the auxiliary expander, discharged from the auxiliary expander The refrigerant and the refrigerant heat-exchanged in the expander after being evaporated in the indoor unit or the outdoor unit are mixed through the heat exchange circuit and supplied to the compressor, and heat generated by the compressor is evaporated by the heat medium circulating in the heat pipe. After being absorbed and discharged from the expander, the low-temperature refrigerant A refrigerant cycle system, characterized by a discharged by the shaft by maryeonham.

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

1 is a block diagram showing a first embodiment of a refrigerant cycle system according to the present invention, the refrigerant cycle system is an expander (1), an indoor heat exchanger (20) for receiving and evaporating the refrigerant discharged from the expander (1) Is equipped with an indoor unit (2), a compressor (3) for receiving and compressing the refrigerant discharged from the indoor unit (2), and an outdoor unit with an outdoor heat exchanger (40) for receiving and condensing the refrigerant discharged from the compressor (3). It includes (4). Of course, the expander 1, the indoor unit 2, the compressor 3 and the outdoor unit 4 are connected by pipes and valves so as to form a refrigerant circulation path for cooling.

In particular, the inlet and outlet of the compressor 3 are respectively connected to the refrigerant suction pipe 91 and the refrigerant discharge pipe 92 are discharged from the indoor unit (2) of the low temperature low pressure sucked through the refrigerant suction pipe (91) The refrigerant is compressed into a refrigerant having a high temperature and high pressure, and is discharged to the outdoor unit 4 through the refrigerant discharge pipe 92. The refrigerant flows into the compressor 3 into the refrigerant suction pipe 91 and the refrigerant discharge pipe 92. For example, the refrigerant suction side sensor 91a for measuring the temperature and pressure of the refrigerant and the refrigerant discharge side sensor 92a for measuring the temperature and pressure of the refrigerant discharged from the compressor 3, for example, are respectively provided. .

In addition, the refrigerant cycle system of the present embodiment has a heat exchange circuit (7) installed between the expander (1) and the outdoor unit (4), the heat exchange circuit (7) is a housing 72 in which the heat exchanger (70) is built Has

The heat exchanger 70 provides a coolant flow path connecting the expander 1 and the outdoor unit 4, and two coolant inlets 72a and 72c and a coolant discharge port 72b are formed in the housing 72. The refrigerant flowing through the refrigerant inlet (72a, 72c) is in contact with the outer surface of the heat exchanger 70 and heat exchanged with the refrigerant of the heat exchanger 70 and then discharged through the refrigerant outlet (72b) Have

In addition, the auxiliary expansion pipe (93) is branched between the expander (1) and the heat exchange circuit (7) and connected to the first refrigerant inlet (72a) of the housing (72), the auxiliary expansion pipe (93) An auxiliary expander 8 for expanding the refrigerant and a flow control valve 93a for opening and closing of the refrigerant flow and adjusting the flow rate are provided.

In addition, the expander (1) is formed with a first refrigerant passage (10a) and a second refrigerant passage (10b), the first refrigerant passage (10a) of the housing 72 via a connecting pipe (95). It is connected to the second refrigerant inlet (72c), the second refrigerant passage (10b) is a hot refrigerant inlet pipe branched from the refrigerant suction pipe (91) for receiving the refrigerant discharged from the indoor unit (2) to supply to the compressor (3) Is connected to (97), the high temperature refrigerant inlet pipe (97) is provided with a flow rate control valve (97a) for opening and closing of the flow of the refrigerant flow.

In addition, the refrigerant discharge port 72b formed in the housing 72 is connected to the refrigerant suction pipe 91 through an auxiliary refrigerant suction pipe 94 so that the refrigerant and the auxiliary refrigerant suction pipe 94 of the refrigerant suction pipe 91 are closed. Refrigerants are mixed and supplied to the compressor (3). At this time, the auxiliary refrigerant suction pipe 94 is provided with an on-off valve 94a for opening and closing the refrigerant flow, the on-off valve 94a is a refrigerant from the refrigerant suction pipe (91) to the auxiliary refrigerant suction pipe (94). The check valve may be designed to prevent backflow.

In addition, a flow rate control valve 91b for opening and closing the refrigerant flow in the refrigerant suction pipe 91 and adjusting the flow rate of the refrigerant is installed, and opening and closing the refrigerant flow in the cold discharge discharge pipe 92 and, if necessary, the refrigerant. A flow rate control valve 92b for adjusting the flow rate of the gas is provided.

In addition, the refrigerant cycle system of the present embodiment includes a heat pipe 5 installed to discharge the high heat generated by the compressor 3 to the low temperature refrigerant.

The heat pipe 5 provides a sealed space filled with the heat medium, which provides a circulation path in which the vaporized gas heat medium rises and the liquid heat medium descends. That is, the heat pipe 5 may have a conventional structure in which heat transfer is performed by a natural circulation method in which the heat medium evaporated at the bottom rises and the heat medium condensed at the top descends.

More specifically, the heat pipe 5 is a heat medium in the liquid state is located, the heat medium is evaporation unit 52 is installed so as to absorb the heat generated by the compressor 3 by indirect heat exchange, and the heat medium in the gas state Heat medium is discharged from the expander (1) by indirect heat exchange and the heat medium evaporated from the evaporator (52) and the condensation unit (54) installed to release heat to the low temperature refrigerant before entering the compressor (3). It includes a connecting portion 56 for connecting the evaporation unit 52 and the condensation unit 54 to move the condensation unit 54 and the heat medium condensed in the condensation unit 54 to the evaporation unit 52 do.

As shown in FIG. 5, the evaporator 52 is installed at a central portion or a lower portion of the case 30 constituting the compressor 3 via a fixing bracket 58, and thus the evaporator 52 is heated by the high temperature of the case 30. ) The liquid heating medium is evaporated. Of course, the evaporator 52 may be installed to be located inside the case 30 of the compressor 3.

In addition, the evaporator 52 is preferably formed to have a large area in close contact with the surface of the case 30 so that more heat exchange can be made quickly.

In addition, the evaporator 52 may be formed in plural so as to be installed in various parts of the case 30.

The condensing unit 54 is installed to indirect heat exchange with the low temperature refrigerant circulating along the refrigerant cycle, and more specifically, is installed to indirect heat exchange with the low temperature refrigerant before it is discharged from the expander 1 and introduced into the indoor unit 2 or the indoor unit. It may be installed to indirect heat exchange with the low temperature refrigerant before discharged from (2) and introduced into the compressor (3). Alternatively, the condensation unit 54 may be installed to indirect heat exchange with the refrigerant flowing into the refrigerant suction pipe 91 through the auxiliary refrigerant suction pipe 94 or may be installed to indirect heat exchange with the refrigerant of the high temperature refrigerant inlet pipe 97. have.

In addition, the heat pipe 5 adopts a structure in which the evaporator 52 can be spaced apart from the case 30 of the compressor 3 by necessity, or the condenser 54 is required by the low temperature refrigerant. It is possible to adopt a structure that can be spaced apart from the low temperature refrigerant pipe so that heat exchange is not performed. For example, a sensor (not shown) capable of measuring a temperature is installed in the case 30, so that when the temperature of the case 30 is higher than a set temperature according to the measured value of the sensor, the heat pipe 5 is installed in the heat pipe 5. Heat exchange by the heat pipe, and conversely, when the temperature of the case 30 is lower than the set temperature, the heat exchange by the heat pipe 5 may not be performed.

The compressor is largely divided into a volumetric compressor and a turbo compressor according to the compression method, in particular the volumetric compressor has a structure to increase the pressure of the refrigerant by reducing the volume in the compression chamber, reciprocating, rotary (rotary piston type) , Rotary vane type, screw type), scroll type, trocoid type, and the like.

In the embodiment of the present invention has been described as a reciprocating compressor as an example, it is obvious that other structures of the compressor can be applied to the present invention.

The compressor 3 of the present invention has a case 30 which provides a sealed inner space as shown in Figs. 5 and 6, and the compression part 32 and the driving part 34 in the inner space of the case 30. Is provided.

The compression unit 32 compresses the refrigerant of low temperature and low pressure sucked through the suction pipe 32a to high temperature and high pressure, and then discharges the refrigerant through the discharge pipe 32b.

The drive part 34 is installed inside the case 30 to drive the compression part 32.

In addition, the suction pipe 32a has a sensor 33a for detecting a state of the refrigerant sucked into the compression unit 32, for example, the temperature of the refrigerant. Of course, the sensor may have a structure that can be installed in another portion to determine the state of the refrigerant sucked into the compression unit 32, the sensor can be replaced by the refrigerant suction side sensor (91a).

In addition, the compressor 3 has a bypass passage 36 for bypassing the refrigerant so that a part of the refrigerant discharged from the compression unit 32 is supplied to the refrigerant sucked into the compression unit 32 again. The bypass passage 36 is provided with a flow control valve 36a installed to open and close the flow of the refrigerant by controlling the state of the refrigerant sensed by the sensor 33a and to adjust the refrigerant flow rate as needed.

Of course, the sensor 33a is connected to a power supply and a controller (not shown) for controlling the refrigerant cycle system of the present embodiment, and the power supply and the controller are connected to each other by the temperature information of the coolant provided from the sensor 33a. It is preprogrammed to open and close the flow regulating valve 36a of the pass passage 36 and adjust its opening degree.

Then, the heat exchanger 20 of the indoor unit 2 is installed to surround the refrigerant pipe 22 and the refrigerant pipe 22 through which the refrigerant flows, as shown in FIG. It includes a tube 24, the fin-shaped heat sink (26) is provided on the outside of the latent heat pipe (24).

In the refrigerant cycle system of the first embodiment having the above configuration, the refrigerant is evaporated in the indoor heat exchanger (20) of the indoor unit (2) to absorb heat from the room and flow into the compressor (3) through the refrigerant suction pipe (91). The refrigerant discharged from the compressor (3) flows into the outdoor unit (4) through the refrigerant discharge pipe (92), condenses in the outdoor heat exchanger (40), and releases heat to the outside, and discharges from the outdoor unit (4). The refrigerant is expanded while passing through the expander (1) to form a circulation cycle flowing into the indoor unit (2).

In addition, the flow control valve 93a of the auxiliary expansion pipe 93 branched between the expander 1 and the heat exchange circuit 7 is opened to have an appropriate opening degree, so that a part of the refrigerant flowing into the expander 1 is sub-expanded. After the expansion in the auxiliary expander (8) through the pipe 93 is supplied to the heat exchange circuit (7).

In addition, the flow rate control valve 97a of the high temperature refrigerant inlet pipe 97 branched from the refrigerant suction pipe 91 for receiving the refrigerant discharged from the indoor unit 2 and supplying it to the compressor 3 is opened to have an appropriate opening degree. A portion of the refrigerant flowing into (3) is indirectly heat exchanged in the expander 1 through the high temperature refrigerant inlet pipe 97 and then supplied to the heat exchange circuit 7.

Therefore, the refrigerant introduced into the heat exchange circuit 7 is indirectly heat exchanged with the refrigerant moving from the outdoor unit 4 to the expander 1, and then flows into the refrigerant suction pipe 91 through the auxiliary refrigerant suction pipe 94 so that the indoor unit It is supplied to the compressor 3 in the state mixed with the refrigerant | coolant discharged from (2).

In addition, when the high heat generated inside the compressor 3 by the operation of the compressor 3 raises the temperature of the case 30, the liquid heat medium present in the evaporation unit 52 of the heat pipe 5 evaporates. While absorbing the heat of the case 30, the heat medium thus evaporated is moved to the condensation unit 54 through the connection portion 56 to condense to heat the refrigerant in the low-temperature refrigerant pipe installed so as to exchange heat with the condensation unit 54 Emits. Of course, the liquid heat medium condensed in the condenser 54 is returned to the evaporator 52 through the connecting portion 56 again.

Accordingly, the case 30 of the compressor 3 is cooled by heat exchange between the case 30 of the compressor 3 and the low temperature refrigerant by the heat pipe 5, which indicates that the compressor is deteriorated or damaged by high heat. prevent.

In addition, when the temperature of the refrigerant sucked into the compression unit 32 of the compressor 3 is lower than the reference temperature, the flow control valve 36a is opened to discharge the high temperature and high pressure discharged from the compression unit 32 of the compressor 3. Some of the refrigerant in the mixture is mixed with the refrigerant sucked back into the compression unit 32 of the compressor 3 through the bypass passage 36, thereby increasing the temperature of the refrigerant sucked into the compression unit 32, which is the operation of the compressor. Keep the state in optimal state.

In addition, the indoor heat exchanger 20 of the indoor unit 2 is installed so that the latent heat pipe 24 surrounds the outside of the refrigerant pipe 22 through which the refrigerant flows, and in particular, the latent heat material 24 is filled in the latent heat pipe 24. In the above state, the cold heat of the refrigerant flowing in the refrigerant pipe 22 is absorbed by the latent heat material, which is absorbed by the latent heat material when the temperature of the refrigerant flowing through the refrigerant pipes 22 and 44 rises sharply. By performing the buffering action to prevent the sudden temperature rise of the air discharged from the indoor unit (2).

2 is a block diagram showing a second embodiment of the refrigerant cycle system according to the present invention, the refrigerant cycle system is an expander (1), an outdoor heat exchanger (40) for receiving and evaporating the refrigerant discharged from the expander (1) Is equipped with an outdoor unit (4), a compressor (3) for receiving and compressing the refrigerant discharged from the outdoor unit (4), and an indoor unit with an indoor heat exchanger (20) for receiving and condensing the refrigerant discharged from the compressor (3). It includes (2). Of course, the inflator 1, the indoor unit 2, the compressor 3 and the outdoor unit 4 are connected by pipes and valves to form a refrigerant circulation path for heating.

In particular, the inlet and outlet of the compressor 3 are respectively connected to the refrigerant suction pipe 91 and the refrigerant discharge pipe 92 are discharged from the outdoor unit (4) of the low temperature low pressure sucked through the refrigerant suction pipe (91) The refrigerant is compressed into a refrigerant having a high temperature and high pressure, and is discharged to the indoor unit 2 through the refrigerant discharge pipe 92. The refrigerant flows into the compressor 3 into the refrigerant suction pipe 91 and the refrigerant discharge pipe 92. For example, the refrigerant suction side sensor 91a for measuring the temperature and pressure of the refrigerant and the refrigerant discharge side sensor 92a for measuring the temperature and pressure of the refrigerant discharged from the compressor 3, for example, are respectively provided. .

In addition, the refrigerant cycle system of the present embodiment has a heat exchange circuit (7) installed between the expander (1) and the indoor unit (2), the heat exchange circuit (7) is a housing 72 in which the heat exchanger (70) is built-in Has

The heat exchanger 70 provides a coolant flow path connecting the expander 1 and the indoor unit 2, and two coolant inlets 72a and 72c and a coolant discharge port 72b are formed in the housing 72. The refrigerant flowing through the refrigerant inlet (72a, 72c) is in contact with the outer surface of the heat exchanger 70 and heat exchanged with the refrigerant of the heat exchanger 70 and then discharged through the refrigerant outlet (72b) Have

In addition, the auxiliary expansion pipe (93) is branched between the expander (1) and the heat exchange circuit (7) and connected to the first refrigerant inlet (72a) of the housing (72), the auxiliary expansion pipe (93) An auxiliary expander 8 for expanding the refrigerant and a flow control valve 93a for opening and closing of the refrigerant flow and adjusting the flow rate are provided.

In addition, the expander (1) is formed with a first refrigerant passage (10a) and a second refrigerant passage (10b), the first refrigerant passage (10a) of the housing 72 via a connecting pipe (95). It is connected to the second refrigerant inlet (72c), the second refrigerant passage (10b) is a hot refrigerant inlet pipe branched from the refrigerant suction pipe (91) for receiving the refrigerant discharged from the outdoor unit (4) to supply to the compressor (3) Is connected to (97), the high temperature refrigerant inlet pipe (97) is provided with a flow rate control valve (97a) for opening and closing of the flow of the refrigerant flow.

In addition, the refrigerant discharge port 72b formed in the housing 72 is connected to the refrigerant suction pipe 91 through an auxiliary refrigerant suction pipe 94 so that the refrigerant and the auxiliary refrigerant suction pipe 94 of the refrigerant suction pipe 91 are closed. Refrigerants are mixed and supplied to the compressor (3). At this time, the auxiliary refrigerant suction pipe 94 is provided with an on-off valve 94a for opening and closing the refrigerant flow, the on-off valve 94a is a refrigerant from the refrigerant suction pipe (91) to the auxiliary refrigerant suction pipe (94). The check valve may be designed to prevent backflow.

In addition, a flow rate control valve 91b for opening and closing the refrigerant flow in the refrigerant suction pipe 91 and adjusting the flow rate of the refrigerant is installed, and opening and closing the refrigerant flow in the cold discharge discharge pipe 92 and, if necessary, the refrigerant. A flow rate control valve 92b for adjusting the flow rate of the gas is provided.

In addition, the refrigerant cycle system of the present embodiment includes a heat pipe 5 installed to discharge the high heat generated by the compressor 3 to the low temperature refrigerant.

The heat pipe 5 has the same structure as the heat pipe of the first embodiment, the condensation unit 54 of the heat pipe 5 is installed to indirect heat exchange with the low temperature refrigerant circulating along the refrigerant cycle, in more detail May be installed to indirect heat exchange with the low temperature refrigerant before discharged from the expander 1 and introduced into the outdoor unit 4, or may be installed to indirect heat exchange with the low temperature refrigerant before discharged from the outdoor unit 4 and introduced into the compressor 3. Alternatively, the condensation unit 54 may be installed to indirect heat exchange with the refrigerant flowing into the refrigerant suction pipe 91 through the auxiliary refrigerant suction pipe 94.

Since the heat exchanger 20 of the compressor 3 and the indoor unit 2 has the same structure as that of the first embodiment, detailed description thereof will be omitted.

In the refrigerant cycle system according to the second embodiment having the above configuration, the refrigerant is evaporated in the outdoor heat exchanger (40) of the outdoor unit (4) to absorb heat from the outside and flows into the compressor (3) through the refrigerant suction pipe (91). The refrigerant discharged from the compressor (3) flows into the indoor unit (2) through the refrigerant discharge pipe (92), condenses in the indoor heat exchanger (20), and releases heat to the room, and discharges from the indoor unit (2). The refrigerant is expanded while passing through the expander (1) to form a circulation cycle flowing into the outdoor unit (4).

In addition, the flow control valve 93a of the auxiliary expansion pipe 93 branched between the expander 1 and the heat exchange circuit 7 is opened to have an appropriate opening degree, so that a part of the refrigerant flowing into the expander 1 is sub-expanded. After the expansion in the auxiliary expander (8) through the pipe 93 is supplied to the heat exchange circuit (7).

In addition, the flow rate control valve 97a of the high temperature refrigerant inlet pipe 97 branched from the refrigerant suction pipe 91 for receiving the refrigerant discharged from the outdoor unit 4 and supplying it to the compressor 3 is opened to have an appropriate opening degree. A portion of the refrigerant flowing into (3) is indirectly heat exchanged in the expander 1 through the high temperature refrigerant inlet pipe 97 and then supplied to the heat exchange circuit 7.

Therefore, the refrigerant introduced into the heat exchange circuit 7 is indirectly heat exchanged with the refrigerant moving from the indoor unit 2 to the expander 1, and then flows into the refrigerant suction pipe 91 through the auxiliary refrigerant suction pipe 94 to be supplied to the outdoor unit. It is supplied to the compressor 3 in the state mixed with the refrigerant | coolant discharged from (4).

In addition, when the high heat generated inside the compressor 3 by the operation of the compressor 3 raises the temperature of the case 30, the liquid heat medium present in the evaporation unit 52 of the heat pipe 5 evaporates. While absorbing the heat of the case 30, the heat medium thus evaporated is moved to the condensation unit 54 through the connection portion 56 to condense to heat the refrigerant in the low-temperature refrigerant pipe installed so as to exchange heat with the condensation unit 54 Emits. Of course, the liquid heat medium condensed in the condenser 54 is returned to the evaporator 52 through the connecting portion 56 again.

Accordingly, the case 30 of the compressor 3 is cooled by heat exchange between the case 30 of the compressor 3 and the low temperature refrigerant by the heat pipe 5, which indicates that the compressor is deteriorated or damaged by high heat. prevent.

In addition, when the temperature of the refrigerant sucked into the compression unit 32 of the compressor 3 is lower than the reference temperature, the flow control valve 36a is opened to discharge the high temperature and high pressure discharged from the compression unit 32 of the compressor 3. Some of the refrigerant in the mixture is mixed with the refrigerant sucked back into the compression unit 32 of the compressor 3 through the bypass passage 36, thereby increasing the temperature of the refrigerant sucked into the compression unit 32, which is the operation of the compressor. Keep the state in optimal state.

In addition, the indoor heat exchanger 20 of the indoor unit 2 is installed so that the latent heat pipe 24 surrounds the outside of the refrigerant pipe 22 through which the refrigerant flows, and in particular, the latent heat material 24 is filled in the latent heat pipe 24. In the above state, the heat of the refrigerant flowing in the refrigerant pipe 22 is absorbed by the latent heat material, and the heat absorbed by the latent heat material when the temperature of the refrigerant flowing through the refrigerant pipes 22 and 44 drops sharply. By performing the buffering action to prevent the sudden temperature drop of the air discharged from the indoor unit (2).

Figure 3 is a configuration diagram showing a third embodiment of the refrigerant cycle system according to the present invention, the refrigerant cycle system is an inflator (1) for expanding and discharging the refrigerant introduced at a high temperature, high pressure to a low temperature, low pressure in an insulated state, Built-in indoor heat exchanger 20, the indoor unit (2) arranged indoors, the compressor (3) for compressing and discharging the refrigerant introduced at low pressure to a high pressure in a heat insulating state, and the outdoor heat exchanger (40) built-in It includes an outdoor unit 4 disposed.

The expander 1, the indoor unit 3, the compressor 3, and the outdoor unit 4 are connected by pipes and valves to form a refrigerant circulation path for cooling and heating.

In particular, the refrigerant inlet pipe 91 and the refrigerant discharge pipe 92 are connected to the inlet and the outlet of the compressor 3, respectively, and the refrigerant suction pipe 91 and the refrigerant discharge pipe 92 are four-way valves 90. ) Is connected to the indoor unit connecting pipe 28 and the outdoor unit connecting pipe (48). The indoor unit connection pipe 28 is connected to the indoor unit 2, and the outdoor unit connection pipe 48 is connected to the outdoor unit 4.

The four-way valve (90) is discharged from the indoor unit (2) by connecting the indoor unit connecting pipe 28 and the refrigerant suction pipe (91) and the outdoor unit connecting pipe (48) and the refrigerant discharge pipe (92) by its operation. The low temperature low pressure refrigerant sucked through the refrigerant suction pipe 91 is compressed into a high temperature high pressure refrigerant and discharged to the outdoor unit 4 through the refrigerant discharge pipe 92, or the indoor unit connection pipe 28 and the refrigerant discharge pipe ( 92) and the outdoor unit connecting pipe 48 and the refrigerant suction pipe 91 are discharged from the outdoor unit 4 and the low temperature low pressure refrigerant sucked through the refrigerant suction pipe 91 is compressed into a high temperature high pressure refrigerant. The refrigerant is discharged to the indoor unit 2 through the discharge pipe 92.

In addition, the refrigerant suction pipe 91 and the refrigerant discharge pipe 92 have a refrigerant suction side sensor 91a and a compressor 3 for measuring the state of the refrigerant flowing into the compressor 3, for example, the temperature and pressure of the refrigerant. The refrigerant discharge side sensor 92a for measuring the state of the refrigerant discharged from the refrigerant, for example, the temperature and pressure of the refrigerant, is provided.

In addition, the refrigerant cycle system of the present embodiment has a first heat exchange circuit 7 ′ provided between the expander 1 and the outdoor unit 4 and a second heat exchange circuit provided between the expander 1 and the indoor unit 2. 7 ", the heat exchange circuits 7 'and 7" each have a housing 72 in which a heat exchanger 70 is incorporated.

The heat exchanger 70 of the first heat exchange circuit 7 ′ provides a refrigerant flow path connecting the expander 1 and the outdoor unit 4, and the heat exchanger 70 of the second heat exchange circuit 7 ″ is provided. A refrigerant flow path connecting the expander (1) and the indoor unit (2) is provided.

In addition, two refrigerant inlets 72a and 72c and a refrigerant outlet 72b are formed in the housing 72 of the first heat exchange circuit 7 'so that the refrigerant flowed through the refrigerant inlets 72a and 72c. Is in contact with the outer surface of the heat exchanger (70) provided in the first heat exchange circuit (7 ') and heat exchanged with the refrigerant of the heat exchanger 70 and is discharged through the refrigerant outlet (72b), In the housing 72 of the second heat exchange circuit 7 ", two refrigerant inlets 72a and 72c and a refrigerant outlet 72b are formed, thereby allowing the refrigerant introduced through the refrigerant inlets 72a and 72c to be discharged. It is in contact with the outer surface of the heat exchanger 70 provided in the two heat exchange circuit (7 ") and heat exchanged with the refrigerant of the heat exchanger 70 and has a configuration discharged through the refrigerant discharge port (72b).

The first auxiliary expansion pipe 93 'is branched between the inflator 1 and the first heat exchange circuit 7' to form a first refrigerant formed in the housing 72 of the first heat exchange circuit 7 '. A second auxiliary expansion pipe 93 "is branched between the inflator 1 and the second heat exchange circuit 7" to connect the inlet 72a to the housing 72 of the second heat exchange circuit 7 ". First and second auxiliary expanders 8 'and 8' connected to the first refrigerant inlet 72a formed at the first and second auxiliary expansion pipes 93 'and 93 " &Quot;) and a flow regulating valve 93a for opening and closing the refrigerant flow and regulating the flow rate are respectively provided.

In addition, the expander (1) is formed with a first refrigerant passage (10a) and a second refrigerant passage (10b), the first refrigerant passage (10a) is a first connection pipe (95A) having an opening and closing valve (99a) Is connected to a second refrigerant inlet 72c formed in the housing 72 of the first heat exchange circuit 7 ', and the second refrigerant passage 10b is provided with an on / off valve 99b. It is connected to the second refrigerant inlet (72c) formed in the housing 72 of the second heat exchange circuit (7 ") via a connecting pipe (95B), the first connecting pipe (95A) and the second connecting pipe (95B). ) Are connected to each other via a third connecting pipe (95C).

The third connection pipe 95C is connected to the high temperature refrigerant inlet pipe 97 branched from the refrigerant suction pipe 91 which receives the refrigerant discharged from the indoor unit 2 or the outdoor unit 4 and supplies the refrigerant to the compressor 3. Is connected, the high temperature refrigerant inlet pipe (97) is provided with a flow rate control valve (97a) for opening and closing the flow of the refrigerant flow.

In addition, the third connecting pipe (95C) is installed on both sides of the first connecting pipe (95A) connecting valves (99c, 99d) is installed in the high temperature refrigerant inlet pipe 97, the first connecting pipe (95A) And opening and closing the flow path of the refrigerant flowing toward the second connection pipe 95B. Of course, the refrigerant of the high temperature refrigerant inlet pipe 97 is connected to the third connection pipe 95C and the high temperature refrigerant inlet pipe 97 at any one of the first connection pipe 95A or the second connection pipe 95B. A three-way valve may be provided to flow in the direction.

In addition, the refrigerant discharge port 72b formed in the housing 72 of the first heat exchange circuit 7 'is connected to the auxiliary suction pipe 94 through an open / close valve 99e, and the second heat exchange circuit 7 " The refrigerant discharge port 72b formed in the housing 72 of the refrigerant is connected to the auxiliary suction pipe 94 through an open / close valve 99f, and the auxiliary suction pipe 94 is connected to the refrigerant suction pipe 91 to allow the refrigerant. The refrigerant in the suction pipe 91 and the refrigerant in the auxiliary refrigerant suction pipe 94 are mixed and supplied to the compressor 3. At this time, the auxiliary refrigerant suction pipe 94 opens and closes a valve 94a for opening and closing the refrigerant flow. Is provided, the on-off valve (94a) may be a check valve to prevent the refrigerant from flowing back from the refrigerant suction pipe (91) to the auxiliary refrigerant suction pipe (94).

In addition, a flow rate control valve 91a for opening and closing the refrigerant flow in the refrigerant suction pipe 91 and adjusting the flow rate of the refrigerant is installed, and opening and closing the refrigerant flow in the refrigerant discharge pipe 92 and, if necessary, the refrigerant. A flow control valve 92a for adjusting the flow rate of the gas is provided.

In addition, the refrigerant cycle system of the present embodiment includes a heat pipe 5 installed to discharge the high heat generated by the compressor 3 to the low temperature refrigerant.

The heat pipe 5 has the same structure as the heat pipe of the third embodiment, the condensation unit 54 of the heat pipe 5 is installed to indirect heat exchange with the low temperature refrigerant circulating along the refrigerant cycle, in more detail The low temperature is discharged from the expander (1) is installed to indirect heat exchange with the low-temperature refrigerant before entering the indoor unit (2) or outdoor unit (4) or low temperature before discharged from the indoor unit (2) or outdoor unit (4) and introduced into the compressor (3) It may be installed to indirect heat exchange with the refrigerant. Alternatively, the condensation unit 54 may be installed to indirectly exchange heat with the refrigerant flowing into the refrigerant suction pipe 91 through the auxiliary refrigerant suction pipe 94, or may be installed to indirect heat exchange with the refrigerant of the high temperature refrigerant inlet pipe 97. Can be.

Since the heat exchanger 20 of the compressor 3 and the indoor unit 2 has the same structure as that of the first embodiment, detailed description thereof will be omitted.

In the refrigerant cycle system of the third embodiment having such a configuration, cooling or heating is performed by a user's selection.

First, when cooling is selected, the four-way valve 90 provides a refrigerant passage so that the refrigerant discharged from the indoor unit 2 flows into the compressor 3 and the refrigerant discharged from the compressor 3 flows into the outdoor unit 4. . Then, the opening / closing valve 99c of the third connecting pipe 95C, the opening / closing valve 99b of the second connecting pipe 95B, the flow control valve 93a and the second heat exchange of the first auxiliary expansion pipe 93 '. The opening / closing valve 99f, which is responsible for opening and closing of the refrigerant discharge port 72c and the auxiliary refrigerant suction pipe 94 formed in the housing 72 of the circuit 7 ″, is closed.

In the case of such cooling, the flow of the refrigerant and its action are the same as in the first embodiment, and thus the detailed description thereof will be omitted.

Next, when heating is selected, the four-way valve 90 provides a refrigerant passage so that the refrigerant discharged from the outdoor unit 4 flows into the compressor 3 and the refrigerant discharged from the compressor 3 flows into the indoor unit 2. do. Then, the opening / closing valve 99d of the third connecting pipe 95C, the opening / closing valve 99a of the first connecting pipe 95A, the flow control valve 93a and the first heat exchange of the second auxiliary expansion pipe 93 " The on-off valve 99e, which is responsible for opening and closing of the refrigerant discharge port 72c and the auxiliary refrigerant suction pipe 94 formed in the housing 72 of the circuit 7 ', is closed.

In the case of such heating, since the flow of the refrigerant and its action are the same as in the second embodiment, detailed description thereof will be omitted.

FIG. 4 shows a modification of the third embodiment of the present invention shown in FIG. 3, and the description of the same parts as in the third embodiment will be omitted and only the other parts will be described. This modification can also be applied to the first and second embodiments.

The expander of this embodiment consists of a plurality of expanders 1A and 1B arranged in series or in parallel with respect to the refrigerant path, and the indoor unit 2 includes a plurality of indoor heat exchangers 20A arranged in series or in parallel with respect to the refrigerant path. Compressor 3 is composed of a plurality of compressors 3A and 3B arranged in series or in parallel with respect to the refrigerant path, and the outdoor unit 4 is arranged in series or in parallel with respect to the refrigerant path. A plurality of outdoor heat exchangers 40A and 40B.

In addition, the first and second heat exchange circuits 7 'and 7 "each include a plurality of heat exchangers 70A and 70B arranged in series or in parallel with respect to the refrigerant path, respectively, and the first and second auxiliary expanders. 8 consists of a plurality of auxiliary expanders 8A and 8B arranged in series or in parallel with respect to the refrigerant path.

At this time, the housing 72 constituting the first heat exchange circuit (7 ') is formed with a refrigerant outlet (72b) at the site where the heat exchanger (70A) connected to the outdoor unit (4) is accommodated and the heat exchanger (connected to the expander 1) The refrigerant suction opening 72a is formed at the portion where 70B) is accommodated. In the housing 72 forming the second heat exchange circuit 7 ″, a refrigerant outlet 72b is formed at a portion where the heat exchanger 70B connected to the indoor unit 2 is accommodated, and the heat exchanger 70A connected to the expander 1. The coolant inlet 72a is formed at the portion where () is accommodated, of course, this is not intended to limit the positions of the coolant inlet and the coolant outlet, and are merely illustrative.

The refrigerant cycle system of the present embodiment having such a configuration can increase heat exchange, expansion, and compression capacity for the refrigerant by a plurality of components, which is not only easy to increase the capacity of the refrigerant cycle system, It is desirable to be able to reduce the load on the components.

In addition, a distributor 96 is installed at the refrigerant discharge part of the first auxiliary expander 8 ', and the refrigerant is respectively provided at the sites where the first and second heat exchangers 70A and 7B of the first heat exchange circuit 7' are accommodated. It may be configured to distribute or to selectively supply a refrigerant as needed. This structure can also be applied to the connection structure of the second auxiliary expander 8 "and the second heat exchange circuit 7".

In the case where the distributor 96 is used as described above, it is discharged from the auxiliary expanders 8 'and 8 "and flows into the heat exchange circuit 7' and 7" according to the path of the refrigerant by setting the distributor 96. By changing the refrigerant temperature and the refrigerant temperature supplied to the auxiliary refrigerant suction pipe 94, it is possible to operate the refrigerant cycle system under various conditions.

As described above, according to the refrigerant cycle system according to the present invention, by supplying high temperature generated by the compressor to the low-temperature refrigerant to be released to the atmosphere, the compressor is not only prevented from being degraded or damaged by high heat, but also by the waste heat recovery. It has an excellent effect of improving the thermal efficiency of the cycle system.

Claims (21)

In the refrigerant cycle system configured to lower the temperature of the room, which is the cooling zone, while the refrigerant is moved along the circulation path fed back to the expander through an expander, an indoor unit having an indoor heat exchanger, a compressor and an outdoor unit having an outdoor heat exchanger, The refrigerant condensed in the outdoor unit flows into the expander through a heat exchange circuit, and a portion of the refrigerant flowing into the expander is adiabaticly expanded in the auxiliary expander, and evaporates from the refrigerant discharged from the auxiliary expander and the indoor unit in the expander. The heat exchanged refrigerant is mixed through the heat exchange circuit and supplied to the compressor, and the heat generated in the compressor is absorbed by the evaporation of the heat medium circulated inside the heat pipe, and then discharged from the expander before being introduced into the compressor. Refrigerant cycle system, characterized in that discharged by the condensation in the refrigerant. The compressor of claim 1, wherein the compressor includes a case providing a sealed internal space, a compression unit installed inside the case to compress and discharge the sucked refrigerant, and a case inside the case to drive the compression unit. A sensor installed to detect a state of the refrigerant sucked into the compression unit through the suction pipe and a part of the refrigerant discharged from the compression unit according to the state of the refrigerant sensed by the sensor to be mixed with the refrigerant sucked into the compression unit; And a bypass passage for bypassing the refrigerant and opening and closing the valve by a valve. The refrigerant cycle system as claimed in claim 1 or 2, wherein the compressor is connected in series or in parallel with respect to the flow of the refrigerant. The refrigerant cycle system as claimed in claim 1, wherein the indoor heat exchanger comprises a refrigerant pipe through which a refrigerant flows and a latent heat pipe filled with a latent heat material, the refrigerant pipe being installed to surround the refrigerant pipe. The refrigerant cycle system as claimed in claim 1 or 4, wherein the indoor heat exchanger is connected in series or in parallel with respect to the flow of the refrigerant. The refrigerant cycle system of claim 1, wherein a plurality of expanders are connected in series or in parallel with respect to the flow of the refrigerant. The refrigerant cycle system as claimed in claim 1, wherein the outdoor heat exchanger is connected in series or in parallel with respect to the flow of the refrigerant. Refrigerant cycle system configured to lower the temperature of the heating area while the refrigerant is moved along the circulation path fed back to the expander through the expander, the outdoor unit having an outdoor heat exchanger, the compressor and the indoor unit having an indoor heat exchanger, The refrigerant condensed in the indoor unit flows into the expander through a heat exchange circuit, and a portion of the refrigerant flowing into the expander is adiabaticly expanded in the auxiliary expander, and the refrigerant discharged from the auxiliary expander is evaporated in the outdoor unit and then in the expander. The heat exchanged refrigerant is mixed through the heat exchange circuit and supplied to the compressor, and the heat generated in the compressor is absorbed by the evaporation of the heat medium circulated inside the heat pipe, and then discharged from the expander before being introduced into the compressor. Refrigerant cycle system, characterized in that discharged by the condensation in the refrigerant. The compressor of claim 8, wherein the compressor comprises: a case providing a sealed internal space, a compression unit installed inside the case to compress and discharge the sucked refrigerant, and a inside of the case to drive the compression unit. A sensor installed to detect a state of the refrigerant sucked into the compression unit through the suction pipe and a part of the refrigerant discharged from the compression unit according to the state of the refrigerant sensed by the sensor to be mixed with the refrigerant sucked into the compression unit; And a bypass passage for bypassing the refrigerant and opening and closing the valve by a valve. 10. The refrigerant cycle system according to claim 8 or 9, wherein a plurality of compressors are connected in series or in parallel with respect to the flow of the refrigerant. The refrigerant cycle system of claim 8, wherein the indoor heat exchanger comprises a refrigerant pipe through which a refrigerant flows and a latent heat pipe filled with a latent heat material, and installed to surround the refrigerant pipe. The refrigerant cycle system according to claim 8 or 11, wherein a plurality of indoor heat exchangers are connected in series or in parallel with respect to the flow of the refrigerant. The refrigerant cycle system of claim 8, wherein a plurality of expanders are connected in series or in parallel with respect to the flow of the refrigerant. The refrigerant cycle system of claim 8, wherein the outdoor heat exchanger is connected in series or in parallel with respect to the flow of the refrigerant. The refrigerant consists of an expander, an indoor unit having an indoor heat exchanger, a compressor, and an outdoor heat exchanger. In a refrigerant cycle system, The refrigerant condensed in the outdoor unit or the indoor unit flows into the expander through a heat exchange circuit, and a part of the refrigerant flowing into the expander is adiabaticly expanded in the auxiliary expander, and the refrigerant discharged from the auxiliary expander and evaporated from the indoor unit or the outdoor unit. After the refrigerant heat exchanged in the expander is mixed through the heat exchange circuit is supplied to the compressor, the heat generated in the compressor is absorbed by the evaporation of the heat medium circulated in the heat pipe and then discharged from the expander to the compressor Refrigerant cycle system, characterized in that discharged by condensation to the low temperature refrigerant before entering. The compressor of claim 15, wherein the compressor comprises: a case providing a sealed inner space, a compression unit installed inside the case to compress and discharge the sucked refrigerant, and a inside of the case to drive the compression unit. A sensor installed to detect a state of the refrigerant sucked into the compression unit through the suction pipe and a part of the refrigerant discharged from the compression unit according to the state of the refrigerant sensed by the sensor to be mixed with the refrigerant sucked into the compression unit; And a bypass passage for bypassing the refrigerant and opening and closing the valve by a valve. 17. The refrigerant cycle system according to claim 15 or 16, wherein the compressor is connected in series or in parallel with respect to the flow of the refrigerant. The refrigerant cycle system according to claim 15, wherein the indoor heat exchanger comprises an indoor heat exchanger including a refrigerant pipe through which a refrigerant flows, and a latent heat pipe filled with a latent heat material so as to surround the refrigerant pipe. 19. The refrigerant cycle system according to claim 15 or 18, wherein a plurality of indoor heat exchangers are connected in series or in parallel with respect to the flow of the refrigerant. 16. The refrigerant cycle system as set forth in claim 15, wherein a plurality of expanders are connected in series or in parallel with respect to the flow of the refrigerant. The refrigerant cycle system of claim 8, wherein the outdoor heat exchanger is connected in series or in parallel with respect to the flow of the refrigerant.