KR100513493B1 - Heat pump system - Google Patents

Abstract

The present invention relates to a heat pump, and its purpose is to improve the performance even when the evaporation pressure decreases and the condensation pressure of the heat pump is increased by using azeotrope (different evaporation temperature and condensation temperature) of the high pressure refrigerant and the low pressure refrigerant. And a device for selectively supplying the high pressure refrigerant and the low pressure refrigerant to the main circuit in order to reduce the power required of the compressor.

To this end, the refrigerant control device 6 is attached with heat exchangers 8 and 10 for cooling and heating the refrigerant, and a high pressure refrigerant or a low pressure refrigerant or a liquid refrigerant flows into the heat exchanger 8, and a control signal. It is configured to control the opening and closing valve by controlling the composition of the refrigerant in the main circuit to control the capacity of the heat pump.

Description

Heat pump system

The present invention uses azeotropic (different evaporation temperature) mixed refrigerant of the high-pressure side refrigerant and the low-side side refrigerant to improve performance and reduce the power consumption of the compressor even when the evaporation pressure of the heat pump is lowered and the condensation pressure is increased, In order to prevent deterioration of cooling capacity and heating capacity during winter outdoor air temperature drop and summer outdoor air temperature rise, optimal control of refrigerant flow rate during operation ensures optimal control of rise of condensation pressure and superheat of refrigerant vapor at compressor inlet. By selectively adjusting the non-mixed refrigerant to improve the performance and to prevent the burner of the compressor.

Patent Publication No. 2001-0052480 discloses a conventional heat pump that uses a non-azeotropic mixed refrigerant to change the refrigerant composition flowing through the main circuit of the heat pump to change its capacity. Hereinafter, a conventional heat pump system will be described with reference to the drawings.

3 is a system configuration diagram showing a refrigeration cycle in the conventional heat pump apparatus disclosed in the above publication.

In Fig. 3, a conventional azeotropic mixed refrigerant is sealed in the conventional heat pump apparatus, and the compressor 110, the four-way valve 113, the outdoor heat exchanger 1111, the main expansion device 114, and the indoor heat exchanger 112 are shown. ) Is connected in a loop to form the main circuit of the refrigeration cycle.

A pipe for bypassing the main expansion device 114 is provided in the heat pump device, and the sub expansion device 115 and the sub expansion device 117 are connected in series on the pipe. The bottom of the rectifier separator 117 is connected to a pipe connecting the sub-expansion device 115 and the sub-expansion device 116 via an open / close valve 120.

The rectifier separator 117 is composed of a straight tube extending in the vertical direction, and the apex portion of the rectifier separator 117 communicates with the apex portion of the reservoir 118 through the cooler 130. The reservoir 118 is connected in a ring shape and a closed circuit is formed.

The reservoir 118 is arranged such that its apex is higher than the apex of the rectifier separator 117. In addition, the cooler 130 is disposed to be at a position higher than the apex portion of the reservoir 118.

In the cooler 130 is configured to indirectly heat exchange between the refrigerant from the bottom of the rectifier 117 to the suction pipe of the compressor 110 from the bottom of the rectifier 117 to the suction pipe of the compressor 110. It is.

By opening and closing the opening and closing valve 120 according to the load conditions, the liquid refrigerant and mixed (gas + liquid) flows into the rectifier classifier 117 to introduce the mixed refrigerant (high pressure refrigerant + low pressure refrigerant) and low pressure refrigerant into the low pressure portion. .

However, in the conventional heat pump apparatus, the low pressure refrigerant (high boiling point) and the high pressure refrigerant (low boiling point) are classified in the rectifier classifier 117, but the inflow of the high pressure refrigerant and the low pressure refrigerant alone is impossible, and thus the mixing ratio of the refrigerant ( The control width of the high pressure refrigerant + low pressure refrigerant) is small, the control width of the heating and cooling capacity is small, there is a problem in the high pressure rise of the condenser 112 in the summer, the single refrigerant operation by the classification of non-azeotropic mixed refrigerant is impossible , The reservoir 118 must be located above the apex of the rectifier 117, the cooler 130 must be located above the reservoir 118, so that the height of the device is increased, the expansion of the expansion (115, 116, 119) ) There are so many devices that there is a problem of cycle balance during load fluctuations and outside temperature fluctuations, and only the low pressure refrigerant (high boiling point refrigerant) at the bottom of the rectifier 117 is introduced into the cooler 130. Is not hayeoseo has the disadvantage of resulting in a rapid decrease in heating capacity by increasing the specific volume of the refrigerant inlet of the compressor 110 during the winter outdoor temperature decreases to reduce the refrigerant circulation amount.

The purpose of the present invention is to adjust the azeotropic ratio (different evaporation temperature) mixed refrigerant composition of the high pressure refrigerant and low pressure refrigerant) to improve the performance and reduce the power consumption of the compressor even when the evaporation pressure of the heat pump is lowered and the condensation pressure is increased It is an object to supply a high pressure refrigerant and a low pressure refrigerant selectively (0 to 100%) to the main circuit to form a single cycle or a mixed refrigerant cycle of the high pressure refrigerant and the low pressure refrigerant.

In addition, the cooling capacity and heating capacity are prevented from being lowered in winter when the outside air temperature is lowered and the temperature of the outside air is increased in summer, and optimum control of the refrigerant flow rate and the refrigerant composition ratio during operation increases the condensation pressure and the superheat of the refrigerant vapor at the inlet of the compressor. It is designed to prevent the overload of the compressor to prevent the performance improvement and burnout of the compressor, and to provide a heat pump system equipped with a heat exchanger (cooling and heating) for the smooth introduction of the refrigerant as a refrigerant control device.

In order to achieve the above object, a refrigeration system according to the present invention, a compressor for compressing and discharging the refrigerant gas at a high temperature and high pressure state, a condenser for condensing the refrigerant compressed by the compressor in the liquid phase, the high temperature condensed in the condenser An expansion valve for expanding a high pressure liquid refrigerant to a low pressure liquid refrigerant, and evaporating while achieving a refrigerating effect by heat exchange with the object to be cooled using evaporative latent heat of the refrigerant while evaporating the refrigerant expanded in the expansion valve. A refrigeration system comprising an evaporator for returning a low-temperature, low-pressure gaseous refrigerant gas to a compressor,

In the condenser or evaporator or the liquid refrigerant pipe, the refrigerant gas or liquid refrigerant or mixed gas (gas phase + liquid phase) is introduced into the refrigerant control device and cooled, and the low pressure refrigerant and the high pressure refrigerant are classified and stored, and if necessary, the inflow to the low pressure side is controlled. A refrigerant control device unit;

Cooling thermal bridge that cools the refrigerant in the refrigerant control device by selectively introducing the refrigerant of the lower (low pressure refrigerant) or the upper (high pressure refrigerant) of the refrigerant control device or the liquid refrigerant between the condenser and the evaporator to the expansion valve and the heat exchanger through the refrigerant control valve. Affected area;

A heating heat exchanger configured to heat the high temperature and high pressure liquid refrigerant of the refrigerant control device to a heat exchanger through a refrigerant control valve to heat the refrigerant in the refrigerant control device;

A refrigerant drawing unit configured to control the introduction of a refrigerant into a cooling heat exchanger, a heating heat exchanger, and a refrigerant control device of the refrigerant control device through a refrigerant control valve and a check valve;

The refrigerant control unit is characterized in that the refrigerant delivery unit for introducing the refrigerant to the high pressure and low pressure side.

The features and advantages of the present invention will become more apparent from the detailed description of the preferred embodiments based on the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors may properly interpret the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Hereinafter, an embodiment of a heat pump according to the present invention will be described with reference to the accompanying drawings.

1 is a system diagram during heating, in which a chamber is a condenser 2 and a chamber is an evaporator 3.

Reference numeral 1 denotes a compressor, which is used to inhale refrigerant gas, compress it at high temperature and high pressure, and discharge it, and various forms such as reciprocating type, crank type, swash plate type, wobble plate type, rotary type, and scroll type depending on the purpose of use. Compressor can be applied.

The discharge line of the compressor (1) is connected to the condenser (2), the condenser (2) is condensed into a liquid refrigerant of high temperature and high pressure by dissipating the refrigerant gas discharged from the compressor (1). Although not shown in detail here, the condenser 2 includes a plurality of tubes forming a predetermined flow path by connecting an inlet header, an outlet header, and an inlet / outlet header to communicate with each other, and between the tubes. Any of the conventional forms with corrugated heat transfer fins can be applied. Therefore, the air blown by the cooling fan passes through the heat transfer fins between the tubes, and in this process, the refrigerant flowing in the condenser 2 is deprived of heat to the air blower to perform the condensation of the refrigerant.

On the other hand, the inlet line side of the compressor (1) by evaporating the refrigerant flowing from the expansion valve (4) to be described later by using the latent heat of evaporation at this time evaporator to heat exchange the object to be cooled and the refrigerant to achieve a freezing effect ( 3) is connected. The evaporator 3 includes a plurality of tubes forming a predetermined flow path by connecting an inlet header and an outlet header and the inlet / outlet headers so as to communicate with each other, and a corgate heat transfer fin stacked between the tubes. With conventional forms may be applied. Therefore, the air blown by the cooling fan passes through the heat transfer fins between the tubes, and in this process, the refrigerant flowing in the evaporator 3 takes the temperature (heat amount) of the blowing air, and thus the refrigerant evaporates.

In addition, an expansion valve 4 for supplying the liquid refrigerant in the high temperature and high pressure state supplied to the evaporator 3 so as to easily evaporate by expanding the liquid refrigerant in the high temperature and high pressure state supplied by the throttling action at the inlet end of the evaporator 3. Is installed. Although not shown in detail, the expansion valve (4) has an internal pressure equalizing, capillary tube for controlling the trajectory of the high-pressure refrigerant flow path through the pressure transfer rod by the expansion displacement of the diaphragm according to the temperature inside the temperature reduction chamber. The thermostatic expansion valve, generally called TEV, can be used in various forms, such as external pressure regulation to control the trajectory of the high-pressure refrigerant flow path by the expansion displacement of the diaphragm.

Hereinafter, an embodiment of a heat pump according to the present invention will be described with reference to the accompanying drawings.

The flow of the refrigerant according to FIG. 1 is compressed into a refrigerant gas of high temperature and high pressure in the compressor 1, and is decompressed through the expansion valve 4 after the heat exchange in the condenser 2 through the four sides 5 and converting from the gas phase into the liquid phase. It passes through the evaporator (3), passes through the four sides (5) and enters the suction part of the compressor (1).

In addition, the refrigerant control device 6 includes refrigerant control valves 21, 24, 25 and check valves on the liquid refrigerant pipe between the condenser 2 and the evaporator 3 and the connection pipe of the refrigerant control device 6. Connected to a circuit including 50, 52, 53, and 55, and a refrigerant control valve 26, 32, 33 in the connecting pipe connecting the upper portion of the evaporator 3, the refrigerant control device 6 and the suction side of the compressor 1; The lower and upper portions of the refrigerant control device 6 are connected to a circuit including the refrigerant control valves 22 and 23 in a pipe connecting the expansion valve 7 and the cooling heat exchanger 8, The refrigerant pipes at the upper and lower portions of the refrigerant control device 6 are connected to the suction side of the compressor 1 and the liquid refrigerant pipe connecting the condenser 2 and the evaporator 3 to the refrigerant control valves 27, 28, 30, and 31. And circuits including check valves 51 and 54.

On the other hand, the check valve (50, 51, 52, 53, 54, 55) is installed in front and rear with respect to the refrigerant control valve 20 in the liquid refrigerant pipe between the condenser (2) and the evaporator (3), The check valves 50 and 55 are connected to a connection circuit with the cooling heat exchanger 8 to introduce refrigerant liquid into the cooling heat exchanger 8, and the check valves 52 and 53 are connected to the refrigerant control device 6. It is connected to the connecting circuit to draw the refrigerant liquid to the refrigerant control device 6, check valves 51, 54 are attached to the connection circuit with the refrigerant control device 6, the refrigerant liquid is delivered to the liquid refrigerant in the refrigerant control device (6) Optionally enter the pipe. The check valves 50, 52 and 54 operate when the heating cycle (Cycle) of FIG. 1, and the check valves 51, 53 and 55 operate when the cooling cycle (Cycle) of FIG.

In addition, the cooling heat exchanger (8) is attached to the inside or outside of the refrigerant control device (6), a circuit connecting the cooling heat exchanger (8) in the liquid refrigerant pipe between the condenser (2) and the evaporator (3). Alternatively, the lower and upper portions of the refrigerant control device 6 and the cooling heat exchanger 8 are decompressed at the refrigerant liquid expansion valve 7 when the refrigerant control valves 21, 22, and 23 on the connecting circuit are opened. In (8), after the heat exchange with the refrigerant inside the refrigerant control device (6) is switched to the gas state from the liquid state to flow into the low pressure side.

On the other hand, since the heat exchanger 10 is difficult to draw the main cycle of the high-pressure and low-pressure refrigerant due to the decrease in the pressure and temperature of the refrigerant control device 6 when the external temperature of the winter temperature decreases in winter, the heat exchanger to heat the high-temperature high-pressure refrigerant It is a device which draws into the inside of 10, and raises the pressure inside the refrigerant | coolant control apparatus 6. As shown in FIG. The structure of the heating heat exchanger (10) is a type attached to the inside or outside of the refrigerant control device (6), a circuit connecting the heating heat exchanger (10) in the liquid refrigerant pipe between the condenser (2) and the evaporator (3). And a connection circuit between the heating heat exchanger 10 and the liquid refrigerant pipe. The heat exchanger 10 draws refrigerant liquid into a connection circuit of the check valve 50 and the refrigerant control valves 24 and 34 or a connection circuit of the check valve 52 and the refrigerant control valve 34, and the refrigerant control valve. The circuit including the 27 and the check valve 54 or the circuit including the refrigerant control valve 31 introduces the refrigerant into the low pressure side and the high pressure side.

First, when the outside temperature decreases, when the evaporation pressure of the evaporator 3 decreases the specific volume of the non-azeotropic mixed refrigerant and decreases the amount of refrigerant circulation, the heating capacity of the indoor condenser 2 decreases. Detecting the decrease in air temperature, the refrigerant control valve 23 is opened to depressurize the high pressure refrigerant liquid on the refrigerant control device 6 through the expansion valve 7 to the heat exchanger 8. Cycle to cool the refrigerant, and the refrigerant evaporates and flows into the low pressure side, or the cycle or refrigerant control to open the high pressure refrigerant in the upper portion of the refrigerant control device 6 to the low pressure side by opening the refrigerant control valves 28 and 31. The refrigerant control valves 26 and 33 in the piping circuit connecting the refrigerant pipe at the upper part of the device 6 to the low pressure side are opened to draw a high pressure refrigerant to the low pressure side, and the refrigerant control device 6 is High pressure refrigerant heating cycle Each cycle for optimal control of the refrigerant mixing ratio can be applied individually or in combination.

In addition, the refrigerant control valve 20 is closed and the refrigerant control valve 21 is opened and checked to increase the mixing ratio of the high pressure refrigerant during the heating cycle and to reduce the mixing ratio of the low pressure refrigerant or to purify the refrigerant. The refrigerant liquid is depressurized through the valve 50 and the expansion valve 7 to evaporate in the cooling heat exchanger 8, thereby cooling and depressurizing the refrigerant liquid inside the refrigerant control device 6 and drawing it into the low pressure part. As the cooling medium of the cooling heat exchanger 8, a high pressure refrigerant at the top of the refrigerant control device 6 may be used.

At the same time, the refrigerant control valve 25 is opened and the refrigerant liquid is introduced into the refrigerant control device 6 through the check valve 52 and cooled, depressurized and condensed by the cooling heat exchanger 8. As a result of the difference in density between the high pressure refrigerant and the low pressure refrigerant, separation of the upper and lower sides occurs and is purified and stored.

In the high pressure refrigerant increasing cycle, the cooling refinement (high pressure refrigerant and low pressure refrigerant) by the cooling heat exchanger 8 and the selective increase of the high pressure refrigerant are separately and simultaneously operated.

The introduction of high pressure refrigerant into the low pressure side leads to a decrease in specific volume, resulting in an increase in refrigerant circulation and an increase in heating capacity.

At this time, the pressure inside the refrigerant control device 6 adjusts the expansion valve 7 to be controlled by the intermediate pressure between the high pressure portion and the low pressure portion.

Next, when the outside air temperature rises, the evaporation pressure of the evaporator 3 rises and the specific volume of the refrigerant at the inlet of the compressor 1 decreases, so that the load of the compressor 1 increases due to the increase of the refrigerant circulation, and the indoor condenser ( When the heating capacity of 2) increases, the indoor temperature sensor 57 detects the increase in the indoor air temperature,

The refrigerant control valve 22 is opened to reduce the low pressure refrigerant liquid under the refrigerant control device 6 through the expansion valve 7 to cool the refrigerant inside the refrigerant control device 6 by the cooling heat exchanger 8, and the refrigerant Evaporates and flows into the low pressure side or draws the low pressure refrigerant under the refrigerant control device 6 into the low pressure side by opening the refrigerant control valves 30 and 31.

Each cycle for optimally controlling the refrigerant mixing ratio by introducing a low pressure refrigerant in the lower portion of the refrigerant control device 6 into a heating cycle may be applied individually or in combination.

In addition, in order to increase the mixing ratio of the low pressure refrigerant during the heating cycle and to reduce the mixing ratio of the high pressure refrigerant, the refrigerant control valve 20 is closed and the refrigerant control valve 21 is opened to open the check valve 50. And the refrigerant liquid is reduced in pressure through the expansion valve (7) and evaporated in the cooling heat exchanger (8) to cool and reduce the refrigerant liquid in the refrigerant control device (6) and to be introduced into the low pressure portion. As the cooling medium of the cooling heat exchanger 8, a low pressure refrigerant at the bottom of the refrigerant control device 6 may be used.

At the same time, the refrigerant control valve 25 is opened to draw the refrigerant liquid into the refrigerant control device 6, and the refrigerant liquid is cooled, depressurized and condensed by the cooling heat exchanger 8 to Due to the difference in density, the separation of upper and lower sides occurs, and the purified is stored.

In the low pressure refrigerant increasing cycle, the cooling refinement (high pressure refrigerant and low pressure refrigerant) by the cooling heat exchanger 8 and the selective increase of the low pressure refrigerant are separately and simultaneously operated.

The introduction of low pressure refrigerant into the low pressure side leads to an increase in specific volume, resulting in a decrease in refrigerant circulation and a decrease in heating capacity.

At this time, the pressure inside the refrigerant control device 6 adjusts the expansion valve 7 to be controlled by the intermediate pressure between the high pressure portion and the low pressure portion.

Therefore, when using a specific azeotropy (a refrigerant having different evaporation and condensation temperatures) mixed refrigerant, the specific volume of the refrigerant refrigerant intake of the compressor (1) is increased due to the evaporation temperature and the pressure drop in the evaporator (3) due to the decrease in the outside air temperature in winter, and thus the rapid cooling ability. And cooling and classifying the azeotropic mixed refrigerant by the refrigerant control device 6 when the heating capacity decreases, thereby allowing the high pressure refrigerant alone and the mixed refrigerant to circulate the refrigerating cycle, thereby improving the cooling and heating capability.

2 is a cooling diagram of the present invention, wherein the evaporator 3 is used as a condenser, the condenser 2 is used as an evaporator, and the connection of the four sides 5 is connected to the discharge line of the compressor 1. The condenser 2 is connected to the inlet side of the compressor 1. The cooling cycle is a low pressure refrigerant-oriented cycle among the azeotropic mixed refrigerants.

When the outside air temperature rises or the indoor load increases, the condenser pressure of the condenser 3, which is an outdoor unit, rises and the pressure sensor 71 operates.

The refrigerant control valve 22 is opened to reduce the low pressure refrigerant liquid under the refrigerant control device 6 through the expansion valve 7 to cool the refrigerant inside the refrigerant control device 6 with the cooling heat exchanger 8, and the refrigerant Evaporates and flows into the low pressure side or opens the low pressure refrigerant under the refrigerant control device 6 to the low pressure side by opening the refrigerant control valves 30 and 31.

Each cycle for optimally controlling the refrigerant mixing ratio by introducing a low pressure refrigerant in the lower portion of the refrigerant control device 6 into a cooling cycle may be applied individually or in combination.

In addition, the refrigerant control valve 20 is closed to operate the low pressure refrigerant alone during the cooling cycle, and the refrigerant control valve 21 is opened to open the refrigerant liquid through the check valve 55 and the expansion valve 7. This pressure is reduced and evaporated in the cooling heat exchanger (8) to cool and depressurize the refrigerant liquid inside the refrigerant control device (6) and to enter the low pressure section. As the cooling medium of the cooling heat exchanger (8), a low pressure refrigerant at the bottom of the refrigerant control device (6) may be used by the refrigerant control valve (22).

At the same time, the refrigerant control valve 25 is opened and the refrigerant liquid is introduced into the refrigerant control device 6 through the check valve 53, and cooled, depressurized and condensed by the cooling heat exchanger 8. As a result of the difference in density between the high pressure refrigerant and the low pressure refrigerant, the separation of the upper and lower sides occurs, and the refinement is stored. Only the low pressure refrigerant is sucked into the low pressure portion, and the pressure in the condenser 3 is reduced by the large specific volume of refrigerant vapor and the amount of refrigerant circulating and the amount of condensation heat. Lowers.

In addition, the refrigerant control valve 32 opens when the condensation pressure rises due to the non-condensable gas to open the non-condensable gas into the refrigerant control device 6.

Therefore, when a non-azeotropic (coolant having different evaporation and condensation temperatures) mixed refrigerants is used, the low pressure refrigerant flows into the cooling cycle by the refrigerant control device 6 when the condenser pressure rises in the condenser 3 when the outside air temperature rises during the summer, resulting in excessive condensation pressure. Prevent rise.

In the present invention, the refrigerant control device 6 may be attached to an outdoor unit or an indoor unit, and the heat exchanger of the condenser 2 and the evaporator 3 may be a plate, a shell and tube, or a multi-core cross fin tube. (Cross fin and tube) can be used.

In addition, the present invention may be used azeotropic mixed refrigerant or a single refrigerant, and when using a single refrigerant, the optimum refrigerant circulation amount control and the superheat degree of the refrigerant at the inlet side of the compressor (1).

In addition, in the form of the cooling heat exchanger (8), the refrigerant control device (6) in the form of a tube (tube) or fin tube (plate) or plate (shell) and tube (shell and tube) form, etc. It is also possible to be integrated or separated form inside or outside the), the expansion valve (7) consists of a capillary or temperature expansion valve or electronic expansion.

In addition, the check valves 50, 51, 52, 53, 54, and 55 of FIG. 1 have a coolant heat exchanger through the check valves 50 and 55, as shown in the check valves 50, 51, 54, and 55. Machine 8, the heat exchanger 10 and the refrigerant control device 6 may be introduced into the interior.

In addition, the check valves 50, 51, 52, 53, 54, and 55 of FIG. 1 are connected to the cooling heat exchanger 8, the heating heat exchanger 10, and the refrigerant control device 6 by the check valves 50 and 55. Is drawn into the inside of, and the draw in the cycle at the time of increase and decrease of the refrigerant can be made on the low pressure side.

As will be apparent from the above description, the present invention improves performance even when the evaporation pressure decreases and the condensation pressure of the heat pump is increased by using azeotropic (different evaporation temperature and condensation temperature) mixed refrigerant of the high pressure refrigerant and the low pressure refrigerant. It can reduce the power required of the compressor, prevent the decrease of cooling capacity and heating capacity when the outside air temperature decreases in winter and when the outside air temperature rises in summer, and the condensation pressure rises and the refrigerant at the inlet of the compressor is optimally controlled by the refrigerant flow rate during operation. This device is designed to prevent the overload of the compressor by optimally controlling the degree of superheat of steam to prevent the compressor from overheating and to prevent the damage of the compressor.It can be attached to refrigeration equipment such as existing refrigerators, air conditioners and heat pumps to improve performance and reduce power energy. It can be effective.

1 is a schematic diagram showing a heat pump system according to the present invention when heating

Figure 2 is a schematic diagram of the heat pump system according to the present invention, the cooling time

Figure 3 is a schematic diagram of a conventional refrigerant control heat pump system

<Description of the code | symbol about the principal part of drawing>

1-compressor 2-condenser

3-evaporator 4-expansion valve

5-Four sides 6-Refrigerant controller

7-expansion valve

Claims (10)

A compressor for compressing and discharging the refrigerant gas to a high temperature and high pressure state, a condenser for condensing the refrigerant compressed in the compressor to a liquid phase, and an expansion for expanding the high temperature and high pressure liquid refrigerant condensed in the condenser into a low pressure liquid refrigerant A valve and an evaporator for evaporating the refrigerant gas of low temperature and low pressure to return to the compressor while achieving a refrigeration effect by heat exchange with the object to be cooled using the latent heat of evaporation while evaporating the refrigerant expanded by the expansion valve. In a heat pump system made of, In the liquid refrigerant pipe between the condenser or the evaporator or the condenser and the evaporator, the refrigerant gas or liquid refrigerant or mixed gas (gas phase + liquid) is introduced into the refrigerant control device, cooled, heated and classified (low pressure refrigerant and high pressure refrigerant), and A refrigerant control unit for controlling the inflow to the low pressure side and the high pressure side if necessary; Cooling heat exchanger that cools the refrigerant in the refrigerant control device by selectively introducing the refrigerant in the lower (low pressure refrigerant) or upper portion (high pressure refrigerant) or the liquid refrigerant between the condenser and the evaporator into the expansion valve and the heat exchanger through the refrigerant control valve. part; A heat heat exchanger configured to heat the high temperature and high pressure liquid refrigerant of the refrigerant control device to the heat exchanger through a refrigerant control valve to heat the refrigerant in the refrigerant control device; A refrigerant inlet unit configured to control the introduction of the refrigerant into a cooling heat exchanger, a heating heat exchanger, and a refrigerant control device of the refrigerant control device through a refrigerant control valve and a check valve; A heat pump system comprising a refrigerant delivery unit for introducing a refrigerant to the high pressure and low pressure side in the refrigerant control device. The heat pump system according to claim 1, wherein the refrigerant control device attaches cooling and heating heat exchangers to the inside and the outside, and includes a refrigerant inlet and a refrigerant delivery unit. The method of claim 1, wherein the cooling heat exchanger is attached to the inside and outside of the refrigerant control device, the refrigerant is introduced through the refrigerant inlet, the refrigerant at the outlet of the cooling heat exchanger is introduced into the low pressure side and the high pressure side through the discharge unit. Heat pump system, characterized in that. The method of claim 1, wherein the heat exchanger is attached to the inside and outside of the refrigerant control device, the refrigerant is introduced through the refrigerant inlet, the refrigerant at the outlet of the heat exchanger is drawn into the low pressure side and the high pressure side through the outlet. Heat pump system, characterized in that. The refrigerant inlet unit of claim 1, wherein the refrigerant inlet unit is a device for supplying a refrigerant into a refrigerant control device, a cooling heat exchanger, and a heating heat exchanger, and the front and rear check valves are based on the refrigerant control valve on the liquid refrigerant pipe between the condenser and the evaporator. Respectively, and the refrigerant introduction into the cooling heat exchanger is connected to the expansion valve through the refrigerant control valve at the lower side and the upper side (or the center) of the check valve or the refrigerant control device, respectively, and is introduced into the expansion valve, respectively, and the heat exchanger Refrigerant inlet flows into the heat exchanger via a check valve, and the inlet into the refrigerant control device is introduced into the refrigerant control device via a check valve. The inlet side check valves are respectively installed in a pair connected to the front and back on the basis of the refrigerant control valve on the liquid refrigerant pipe between the condenser and the evaporator, and the inlet side check valve is cooled and heated. It consists of a refrigerant inlet circuit inside the heat exchanger and the refrigerant control unit, and each of the check valve circuits or one check valve circuit or a partial integrated circuit of several circuits.At the rear end of the check valve, a refrigerant control valve is installed. The direction of the heat pump system, characterized in that installed on the refrigerant control device or the cooling or heating heat exchanger side. According to claim 1, The refrigerant delivery unit is a piping circuit for introducing the refrigerant to the low pressure side or the high pressure side in the refrigerant control device or cooling heat exchanger or heating heat exchanger, a circuit connected to the high pressure side or the low pressure side at the top or bottom of the refrigerant control device. It is a circuit connecting the outlet of the cooling heat exchanger to the low pressure side, the refrigerant pipe of the outlet of the heating heat exchanger is connected to the low pressure side or the high pressure side, each including a control valve, the high pressure side refrigerant delivery unit between the condenser and the evaporator Each of which is installed in a forward direction in a pair connected forward and backward on the basis of the refrigerant control valve on the liquid refrigerant pipe of the liquid refrigerant pipe, and the upper part of the evaporator and the refrigerant control device or the upper and lower pressure side of the refrigerant control device or the evaporator, the refrigerant control device and A refrigerant control valve is included in the refrigerant piping circuit connecting the low pressure side. Heat pump system to gong. The internal or external of the refrigerant control device according to claim 1, wherein the cooling and heating heat exchanger is in the form of a tube type or a fin tube or a plate type or a shell and tube. The expansion valve is attached to the heat pump system, characterized in that consisting of a capillary or temperature expansion valve or an electronic expansion valve. The heat pump system according to claim 1, wherein the refrigerant control device is attached to an indoor unit or an outdoor unit. delete