CN114001484A

CN114001484A - Refrigerant system and refrigeration plant

Info

Publication number: CN114001484A
Application number: CN202010667525.6A
Authority: CN
Inventors: 王小龙; 曾令华; 廖四清
Original assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Current assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2022-02-01

Abstract

The invention provides a refrigerant system and refrigeration equipment, wherein the refrigerant system comprises: the compressor comprises an air suction port, an air supplement port and an air exhaust port; one end of the first heat exchanger is communicated with the exhaust port; the air supplementing device is communicated with the other end of the first heat exchanger and an air supplementing port of the compressor; the second heat exchanger is communicated with the air suction port of the compressor and the air supplementing device; the first throttling element is arranged between the first heat exchanger and the air supplementing device; the second throttling element is arranged between the air supplementing device and the second heat exchanger; and the refrigerant radiator is communicated with the air supplementing device and is positioned between the air supplementing device and the air supplementing port or between the first throttling element and the air supplementing device. The invention utilizes the medium-temperature and medium-pressure refrigerant flow path to cool the electric control part, so that the temperature of the electric control part is reduced, the running frequency of the compressor can be improved, and the output capacity of a refrigerant system is improved.

Description

Refrigerant system and refrigeration plant

Technical Field

The invention relates to the technical field of heat dissipation, in particular to a refrigerant system and refrigeration equipment.

Background

Refrigeration equipment such as a variable frequency air conditioner comprises an electric control component, and when the refrigeration equipment is used under high-frequency conditions such as refrigeration overload, the refrigeration equipment is usually protected to stop because the temperature of key parts in the electric control component is overhigh, so that the maximum operating frequency of a compressor is greatly limited, and the capacity output of the air conditioner is limited.

In the related art, a refrigerant radiator is adopted to radiate heat of an electric control, but the refrigerant radiator is arranged between an outlet of a condenser and a throttle valve in the conventional air conditioning system of the compressor without the air supplement function, so that the cooling effect is limited.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art.

To this end, the present invention provides a refrigerant system in a first aspect.

In a second aspect, the present invention provides a refrigeration apparatus.

In a first aspect, the present invention provides a refrigerant system, including: the compressor comprises an air suction port, an air supplement port and an air exhaust port; one end of the first heat exchanger is communicated with the exhaust port; the air supplementing device is communicated with the other end of the first heat exchanger and the air supplementing port; the second heat exchanger is communicated with the air suction port and the air supply device; the first throttling element is arranged between the first heat exchanger and the air supplementing device; the second throttling element is arranged between the air supplementing device and the second heat exchanger; and the refrigerant radiator is communicated with the air supplementing device and is positioned between the air supplementing device and the air supplementing port or between the first throttling element and the air supplementing device.

The refrigerant system provided by the invention comprises: the air-conditioner comprises a compressor, a first heat exchanger, an air supplementing device, a second heat exchanger, a first throttling element, a second throttling element and a refrigerant radiator. Wherein, the compressor comprises an air suction port, an air supplement port and an air exhaust port and has the air supplement function; the first heat exchanger is arranged between the exhaust port of the compressor and the air supplement device, the second heat exchanger is arranged between the air supplement device and the air suction port of the compressor, and the air supplement device is communicated with the compressor and the air supplement port, so that a refrigerant flow path is formed. The refrigerant discharged from the exhaust port enters the air supplement device after passing through the first heat exchanger, the refrigerant is subjected to gas-liquid separation in the air supplement device, the separated gaseous refrigerant returns to the compressor through the air supplement port, and the separated liquid refrigerant returns to the compressor through the air suction port after passing through the second heat exchanger.

In addition, a first throttling element is arranged between the first heat exchanger and the air supplementing device, a second throttling element is arranged between the air supplementing device and the second heat exchanger, and a refrigerant radiator is arranged between the air supplementing device and the air supplementing port or between the first throttling element and the air supplementing device. It is worth noting that the first throttling element forms a first throttling on the refrigerant flow path, the second throttling element forms a second throttling on the refrigerant flow path, and the refrigerant radiator is located at the position limited by the invention, so that the refrigerant flow path with medium pressure and medium temperature in the refrigerant system can be effectively utilized to cool the electric control component, the temperature of the electric control component is reduced, the running frequency of the compressor and the output capacity of the refrigerant system are further improved, and the electric control component has better heat dissipation effect compared with other parts, and the heat dissipation effect of the electric control component is obviously improved.

The refrigerant system according to the above technical scheme of the present invention may further have the following additional technical features:

in the above technical scheme, the air supply device comprises a flash evaporator; the refrigerant radiator is positioned between the first throttling element and the flash evaporator; or the refrigerant radiator is positioned between the second throttling element and the flash evaporator; or the refrigerant radiator is positioned between the air supplementing port and the flash evaporator.

In the technical scheme, the air supply device can adopt a flash evaporator. When the air supply device adopts the flash evaporator, the refrigerant radiator can be placed at one of the following positions: between the first throttling element and the flash evaporator, between the second throttling element and the flash evaporator, and between the air supplementing opening and the flash evaporator. When the refrigerant radiator is arranged at any position, the electric control component can be cooled by using a medium-temperature and medium-pressure refrigerant flow path of the refrigerant system, and the heat dissipation effect of the electric control component is ensured.

In any of the above solutions, the flash evaporator comprises: a first communication port communicating with the first throttling element; the second communication port is communicated with the air supplementing port; and the third communication port is communicated with the second throttling element.

In this embodiment, the flash evaporator includes: a first communication port, a second communication port, and a third communication port. The first communicating port is communicated with the first throttling element, the second communicating port is communicated with the air supplementing port, and the third communicating port is communicated with the second throttling element, so that a complete refrigerant flow path is formed.

In the operation process of the refrigerant system, the refrigerant flows out from an exhaust port of the compressor, passes through the first heat exchanger and the first throttling element, enters the flash evaporator through the first communication port, is subjected to gas-liquid separation in the flash evaporator, flows out of the flash evaporator through the second communication port and returns to the inside of the compressor through the air supplementing port, and flows back to the inside of the compressor through the air suction port after passing through the second evaporator.

In any of the above technical solutions, the refrigerant system further includes: the cold and warm reversing valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is communicated with the exhaust port, the second valve port is communicated with the first heat exchanger, the third valve port is communicated with the second heat exchanger, and the fourth valve port is communicated with the air suction port; the refrigerant system operates in a refrigeration mode, the first valve port is communicated with the second valve port, and the third valve port is communicated with the fourth valve port; and the first valve port is communicated with the third valve port, and the second valve port is communicated with the fourth valve port.

In the technical scheme, the refrigerant system further comprises a cooling and heating reversing valve, and the cooling and heating reversing valve is used for realizing the conversion of the cooling and heating operation of the refrigerant system. The cold and warm reversing valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port. Specifically, the first valve port is communicated with the exhaust port, the second valve port is communicated with the first heat exchanger, the second valve port and the first throttling element are positioned on two sides of the first heat exchanger, the third valve port is communicated with the second heat exchanger, the third valve port and the second throttling element are positioned on two sides of the first heat exchanger, and the fourth valve port is communicated with the air suction port.

When the refrigerant system operates in a refrigeration mode, the first valve port is communicated with the second valve port, and the third valve port is communicated with the fourth valve port. At the moment, the refrigerant is discharged from an exhaust port of the compressor, flows to the first heat exchanger through a first valve port and a second valve port of the cold-warm reversing valve, is subjected to primary throttling and pressure reduction through a first throttling element, and then enters the air supplementing device through a first communication port; the refrigerant is subjected to gas-liquid separation in the air supplementing device, the separated gaseous refrigerant flows out of the air supplementing device from the second communication port and returns to the inside of the compressor through the air supplementing port, and the separated liquid refrigerant flows to the second throttling element from the third communication port, flows to the second heat exchanger after being subjected to secondary throttling and pressure reduction of the second throttling element, and flows back to the compressor from the air suction port through the third valve port and the fourth valve port of the cold-warm reversing valve.

When the refrigerant system operates in a heating mode, the first valve port is communicated with the third valve port, and the second valve port is communicated with the fourth valve port. At the moment, after being discharged from an exhaust port of the compressor, the refrigerant flows to the second heat exchanger through the first valve port and the third valve port of the cold-warm reversing valve, is subjected to primary throttling and pressure reduction through the second throttling element and then enters the air supplementing device; the refrigerant is subjected to gas-liquid separation in the air supplementing device, the separated gaseous refrigerant flows out from the second communicating port and returns to the inside of the compressor from the air supplementing port, and the separated liquid refrigerant flows to the first throttling element from the first communicating port, flows to the first heat exchanger after being subjected to secondary throttling and pressure reduction of the first throttling element, passes through the second valve port and the fourth valve port of the cold-warm reversing valve and flows back to the compressor from the air suction port.

In any of the above technical solutions, the refrigerant system further includes: the control valve is connected with the refrigerant radiator in parallel, the refrigerant system operates in a refrigeration mode, the control valve stops the circulation of the refrigerant, the refrigerant system operates in a heating mode, and the refrigerant flows through the control valve.

In this technical scheme, refrigerant system still includes the control valve. The control valve is connected with the refrigerant radiator in parallel, an inlet of the control valve is communicated with the first communication port of the air supplementing device, and an outlet of the control valve is connected with the first heat exchanger.

When the refrigerant system operates in a refrigeration mode, the control valve stops the circulation of the refrigerant, and the refrigerant passes through the heat dissipation evaporator and cools the electric control component; when the refrigerant system operates in a heating mode, the refrigerant flows through the control valve and does not pass through the refrigerant radiator. Particularly, when the refrigerant system operates in a heating mode, the outdoor temperature is inherently low, and the electric control component does not need to be cooled. Therefore, the control refrigerant directly passes through the control valve, and the working efficiency of the refrigerant system can be improved.

In any of the above technical solutions, the control valve is a one-way valve, and the one-way valve is in one-way communication in a direction from the second throttling element to the first throttling element.

In the technical scheme, the control valve is a one-way valve, and the one-way conductivity of the one-way valve is fully utilized, so that the refrigerant directly flows through the one-way valve in the heating mode, and the refrigerant flows through the heat dissipation evaporator in the heating mode.

In any of the above technical solutions, the air supplement device includes an economizer, and the refrigerant radiator is located between the economizer and the air supplement port; or the refrigerant radiator is positioned between the first throttling element and the economizer.

In the technical scheme, the air supply device can adopt an economizer. When the air supplementing device adopts an economizer, the refrigerant radiator is positioned between the economizer and the air suction port or between the first throttling element and the economizer. When the refrigerant radiator is arranged at any position, the electric control component can be cooled by using a medium-temperature and medium-pressure refrigerant flow path of the refrigerant system, and the heat dissipation effect of the electric control component is ensured.

In the above technical solution, further, the economizer includes: a first communication port communicating with the first throttling element; the second communication port is communicated with the air supplementing port; the third communication port is communicated with the second throttling element; the fourth communication port is connected with the first heat exchanger; the first communication port is communicated with the second communication port to form an auxiliary path of the air supplementing device, the fourth communication port is communicated with the third communication port to form a main path of the air supplementing device, and the refrigerant radiator is communicated with the auxiliary path of the economizer.

In this technical solution, the economizer includes: a first communication port, a second communication port, a third communication port, and a fourth communication port. The first communication port is communicated with the first throttling element, the second communication port is communicated with the air supplementing port, the third communication port is communicated with the second throttling element, and the fourth communication port is connected with the first heat exchanger to form a complete refrigerant flow path.

In addition, the first communication port is communicated with the second communication port to form an auxiliary passage of the air supplementing device, the fourth communication port is communicated with the third communication port to form a main passage of the air supplementing device, and the refrigerant radiator is communicated with the auxiliary passage of the economizer to ensure that the refrigerant on the auxiliary passage passes through the refrigerant radiator and cools the electric control component.

In any of the above technical solutions, the refrigerant system further includes: a cold and warm reversing valve; the cold and warm reversing valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port, wherein the first valve port is communicated with the exhaust port, the second valve port is communicated with the first heat exchanger, the third valve port is communicated with the second heat exchanger, and the fourth valve port is communicated with the air suction port; the reversing device comprises a first interface, a second interface, a third interface and a fourth interface, wherein the first interface is communicated with the first heat exchanger, the second interface is communicated with the first throttling element, the third interface is communicated with the second throttling element, and the fourth interface is communicated with the second heat exchanger; the refrigerant system operates in a refrigeration mode, the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; and in the refrigerant system operation heating mode, the first valve port is communicated with the third valve port, the second valve port is communicated with the fourth valve port, the first interface is communicated with the third interface, and the second interface is communicated with the fourth interface.

In the technical scheme, the property of the economizer determines that the main road and the auxiliary road can only be conducted in a single direction. Therefore, the refrigerant system provided by the invention also comprises the cold-warm reversing valve and the reversing device, so that the cold-warm reversing valve can change the refrigerant flow path, the reversing device is matched with the economizer for use, and the refrigerant flow path is switched between a refrigeration mode and a heating mode through the matching of the cold-warm reversing valve and the reversing device.

The cold and warm reversing valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port, wherein the first valve port is communicated with the exhaust port, the second valve port is communicated with the first heat exchanger, the third valve port is communicated with the second heat exchanger, and the fourth valve port is communicated with the air suction port. The reversing device comprises a first interface, a second interface, a third interface and a fourth interface, wherein the first interface is communicated with the first heat exchanger, the second interface is communicated with the first throttling element, the third interface is communicated with the second throttling element, and the fourth interface is communicated with the second heat exchanger.

Specifically, when the refrigerant system operates in a refrigeration mode, the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface. At the moment, the refrigerant flows through the first heat exchanger after passing through the first valve port and the second valve port of the cooling and heating reversing valve after coming out of the air jet of the compressor, then passes through the first interface and the second interface of the reversing device, a part of the refrigerant flows back to the compressor through the first throttling element and the auxiliary circuit of the economizer, and flows to the second heat exchanger through the third interface and the fourth interface of the reversing device after passing through the main circuit and the second throttling element of the economizer, and then flows back to the inside of the compressor through the third valve port and the fourth valve port of the cooling and heating reversing valve.

Specifically, when the refrigerant system operates in a heating mode, the first valve port is communicated with the third valve port, the second valve port is communicated with the fourth valve port, the first interface is communicated with the third interface, and the second interface is communicated with the fourth interface. At the moment, the refrigerant flows through the second heat exchanger after passing through the first valve port and the third valve port of the cold-warm reversing valve after coming out of the air jet of the compressor, then passes through the fourth interface and the second interface of the reversing device, a part of the refrigerant flows back to the compressor through the first throttling element and the auxiliary circuit of the economizer, and flows back to the second heat exchanger through the air supplementing port, and the other part of the refrigerant flows back to the inside of the compressor through the main circuit and the second throttling element of the economizer, flows to the second heat exchanger through the third interface and the first interface of the reversing device, then passes through the second valve port and the fourth valve port of the cold-warm reversing valve, and flows back to the inside of the compressor through the air suction port.

In any of the above technical schemes, the cold and warm reversing valve is a four-way valve; and/or the reversing device is a four-way valve.

In the technical scheme, the four-way valve can realize the switching of the refrigerant flow path and is convenient to operate.

In any of the above technical solutions, the reversing device includes: the first one-way valve is in one-way communication between the first interface and the second interface; the second one-way valve is in one-way communication between the fourth interface and the second interface; the third one-way valve is in one-way communication between the third interface and the first interface; and the fourth one-way valve is in one-way communication between the third interface and the fourth interface.

In the technical scheme, a one-way valve assembly consisting of four one-way valves can be used for replacing a four-way valve. Specifically, the check valve assembly includes a first check valve, a second check valve, a third check valve, and a fourth check valve. The outlet of the third one-way valve is connected with the inlet of the first one-way valve, and the outlet of the fourth one-way valve is connected with the inlet of the second one-way valve; the first one-way valve is in one-way communication between the first interface and the second interface; the second one-way valve is in one-way communication between the fourth interface and the second interface; the third one-way valve is in one-way communication between the third interface and the first interface; the fourth one-way valve is in one-way communication between the third interface and the fourth interface. Based on the arrangement, the one-way valve assembly has two working modes, can be matched with an economizer for use, and ensures the cold-warm switching of a refrigerant system.

Specifically, when the refrigerant system operates in a refrigeration mode, the first check valve and the fourth check valve are communicated; when the refrigerant system operates in a heating mode, the second one-way valve is communicated with the third one-way valve.

In any of the above technical solutions, the first throttling element is one of or a combination of the following: the electronic expansion valve, the thermostatic expansion valve, the capillary tube and the throttling short tube; and/or the second throttling element is one or a combination of the following: the electronic expansion valve, the thermostatic expansion valve, the capillary tube and the throttling short tube; and/or the compressor is one or a combination of the following: the system comprises an enhanced vapor injection compressor, an independent compressor and a two-stage compressor.

In this embodiment, the first throttling element includes, but is not limited to, the following structure: electronic expansion valve, thermal expansion valve, capillary tube, and throttle sleeve. The throttling components can play a certain throttling and pressure reducing role on the refrigerant, and the cost is lower.

In this embodiment, the second throttling element includes, but is not limited to, the following structure: electronic expansion valve, thermal expansion valve, capillary tube, and throttle sleeve. The throttling components can play a certain throttling and pressure reducing role on the refrigerant, and the cost is lower.

In the technical scheme, the compressor can adopt a form of enhanced vapor injection, independent compression and two-stage compression.

A second aspect of the present invention provides a refrigeration apparatus comprising: an electrical control component; and as for the refrigerant system of any one of the above technical schemes, the refrigerant radiator is in contact with the electric control part.

The refrigeration plant that the invention proposes includes: an electric control part and a refrigerant system according to any one of the above technical schemes. Therefore, the overall beneficial effects of the refrigerant system are not discussed herein. The refrigerant radiator is in contact with the electric control component, and the electric control component and the refrigerant radiator are in contact with each other through a flat plate to dissipate heat. Specifically, the refrigeration equipment provided by the invention is a variable frequency air conditioner.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of a refrigerant system (single chiller) according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a refrigerant system (cooling and heating machine) according to another embodiment of the present invention;

FIG. 3 is a schematic diagram of a refrigerant system (cooling and heating machine) according to another embodiment of the present invention;

FIG. 4 is a schematic diagram of a refrigerant system (cooling and heating machine) according to another embodiment of the present invention;

FIG. 5 is a schematic diagram of a refrigerant system (cooling and heating) according to another embodiment of the present invention;

fig. 6 is a schematic diagram of a refrigerant flow direction of a refrigerant system (a single-cooler) according to another embodiment of the present invention;

FIG. 7 is a schematic diagram of a refrigerant system (chiller) according to yet another embodiment of the present invention;

fig. 8 is a schematic diagram of a refrigerant system according to another embodiment of the present invention (cooling mode for cooling and warming operations);

fig. 9 is a schematic diagram of a refrigerant system (cooling/heating mode for heating operation) according to the embodiment shown in fig. 8;

fig. 10 is a schematic diagram of a refrigerant system according to another embodiment of the present invention (cooling mode for cooling and warming operations);

fig. 11 is a schematic diagram of a refrigerant system (cooling/heating mode for cooling/heating operation) according to the embodiment shown in fig. 10;

fig. 12 is a schematic diagram of a refrigerant system according to another embodiment of the present invention (cooling mode for cooling and warming operations);

fig. 13 is a schematic diagram of a refrigerant system (cooling/heating mode for heating operation) according to the embodiment shown in fig. 12;

fig. 14 is a schematic diagram of a refrigerant system according to another embodiment of the present invention (cooling mode for cooling and warming operations);

fig. 15 is a schematic diagram of a refrigerant system (cooling/heating mode for heating operation) according to the embodiment shown in fig. 14;

FIG. 16 is a schematic view of the communication of the cold and warm reversing valve (cooling mode) in one embodiment of the present invention;

FIG. 17 is a schematic communication diagram of a cooling and heating reversing valve (heating mode) according to an embodiment of the present invention;

FIG. 18 is a schematic communication diagram (cooling mode) of the reversing device in one embodiment of the invention;

FIG. 19 is a schematic communication diagram (heating mode) of the reversing device in one embodiment of the invention;

fig. 20 is a schematic structural diagram of a cold-warm reversing valve in another embodiment of the invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 20 is:

102 compressor, 104 suction port, 106 gas supplementing port, 108 exhaust port, 110 first heat exchanger, 112a flash evaporator, 112b economizer, 114 first communication port, 116 second communication port, 118 third communication port, 120 second heat exchanger, 122 first throttling element, 124 second throttling element, 126 refrigerant radiator, 128 cold-warm reversing valve, 130 first port, 132 second port, 134 third port, 136 fourth port, 138 control valve, 140 fourth communication port, 152 reversing device, 154 first port, 156 second port, 158 third port, 160 fourth port, 162 first check valve, 164 second check valve, 166 third check valve, 168 fourth check valve, 170 reservoir, 172 first cylinder, 174 second cylinder.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

A refrigerant system and a refrigeration apparatus provided according to some embodiments of the present invention will be described with reference to fig. 1 to 20.

The first embodiment is as follows:

as shown in fig. 1, a first embodiment of the present invention provides a refrigerant system, including: the air conditioner comprises a compressor 102, a first heat exchanger 110, an air supplementing device, a second heat exchanger 120, a first throttling element 122, a second throttling element 124 and a refrigerant radiator 126; the gas supply device employs a flash evaporator 112 a.

Wherein, as shown in fig. 1, the compressor 102: comprises an air inlet 104, an air supplement port 106 and an air outlet 108; the first heat exchanger 110 is disposed between the discharge port 108 of the compressor 102 and the flash evaporator 112a, the second heat exchanger 120 is disposed between the flash evaporator 112a and the suction port 104 of the compressor 102, and the flash evaporator 112a is communicated with the compressor 102 and the air supplement port 106, thereby forming a refrigerant flow path.

The refrigerant discharged from the discharge port 108 passes through the first heat exchanger 110 and then enters the flash evaporator 112a, the refrigerant is subjected to gas-liquid separation in the flash evaporator 112a, the separated gaseous refrigerant returns to the compressor 102 through the gas supplementing port 106, and the separated liquid refrigerant returns to the compressor 102 through the gas suction port 104 after passing through the second heat exchanger 120.

Further, as shown in fig. 1, the present embodiment is provided with a first throttling element 122 between the first heat exchanger 110 and the flash evaporator 112a, and a second throttling element 124 between the flash evaporator 112a and the second heat exchanger 120; the refrigerant radiator 126 may be disposed at the following positions: between the first throttling element 122 and the flash vessel 112a, between the second throttling element 124 and the flash vessel 112a, and between the air replenishment port 106 and the flash vessel 112 a.

It is worth noting that the first throttling element 122 forms a first throttling on the refrigerant flow path, the second throttling element 124 forms a second throttling on the refrigerant flow path, and the refrigerant radiator 126 is located at the position defined in this embodiment, and can effectively utilize the medium-pressure and medium-temperature refrigerant flow path in the refrigerant system to cool the electronic control component, so that the temperature of the electronic control component is reduced, the operating frequency of the compressor 102 is further improved, the output capacity of the refrigerant system is improved, and compared with other parts, the heat dissipation effect of the electronic control component is obviously improved.

In this embodiment, further, the flash evaporator 112a includes: a first communication port 114, a second communication port 116, and a third communication port 118. The first communication port 114 communicates with the first throttling element 122, the second communication port 116 communicates with the gas supplementing port 106, and the third communication port 118 communicates with the second throttling element 124, thereby forming a complete refrigerant flow path.

In this embodiment, the refrigerant system may operate in a cooling mode.

Example two:

as shown in fig. 2, 3, 4, and 5, the solid arrows in the drawings indicate the flow of the refrigerant in the cooling mode, and the dotted arrows indicate the flow of the refrigerant in the heating mode. A second embodiment of the present invention provides a refrigerant system, including: the air conditioner comprises a compressor 102, a first heat exchanger 110, an air supplementing device, a second heat exchanger 120, a first throttling element 122, a second throttling element 124, a refrigerant radiator 126 and a cold-warm reversing valve 128; the gas supply device employs a flash evaporator 112 a.

As shown in fig. 2, 3, 4 and 5, the compressor 102 includes a suction port 104, an air supplement port 106 and a discharge port 108; the first heat exchanger 110 is disposed between the discharge port 108 of the compressor 102 and the flash evaporator 112a, the second heat exchanger 120 is disposed between the flash evaporator 112a and the suction port 104 of the compressor 102, and the flash evaporator 112a is communicated with the compressor 102 and the air supplement port 106, thereby forming a refrigerant flow path.

In this embodiment, as shown in fig. 2, fig. 3, fig. 4 and fig. 5, the cooling system further includes a cooling/heating reversing valve 128, and the cooling/heating reversing valve 128 is used for performing cooling operation and heating operation of the cooling system. The cooling and warming reversing valve 128 includes a first port 130, a second port 132, a third port 134 and a fourth port 136.

Specifically, as shown in fig. 2, 3, 4 and 5, the first port 130 communicates with the exhaust port 108, the second port 132 communicates with the first heat exchanger 110, the second port 132 and the first throttling element 122 are located on both sides of the first heat exchanger 110, the third port 134 communicates with the second heat exchanger 120, the third port 134 and the second throttling element 124 are located on both sides of the first heat exchanger 110, and the fourth port 136 communicates with the suction port 104.

As shown in fig. 5 and 16, when the refrigerant system operates in the cooling mode, the first port 130 communicates with the second port 132, and the third port 134 communicates with the fourth port 136. At this time, after being discharged from the discharge port 108 of the compressor 102, the refrigerant is subjected to first-stage throttling and pressure reduction by the first throttling element 122, and then enters the flash evaporator 112a through the first communication port 114; the refrigerant is separated from gas and liquid in the flash evaporator 112a, the separated gaseous refrigerant flows out of the flash evaporator 112a from the second communication port 116 and returns to the interior of the compressor 102 through the air supplement port 106, the separated liquid refrigerant flows out of the third communication port 118, flows to the second throttling element 124, is subjected to secondary throttling and pressure reduction by the second throttling element 124, flows to the second heat exchanger 120, and flows back to the compressor 102 from the air suction port 104 through the third valve port 134 and the fourth valve port 136 of the cooling and heating reversing valve 128.

As shown in fig. 5 and 16, when the refrigerant system operates in the heating mode, the first port 130 communicates with the third port 134, and the second port 132 communicates with the fourth port 136. At this time, after being discharged from the exhaust port 108 of the compressor 102, the refrigerant flows to the second heat exchanger 120 through the first valve port 130 and the third valve port 134 of the cooling/heating reversing valve 128, and enters the flash evaporator 112a after being subjected to the first-stage throttling and pressure reduction by the second throttling element 124; the refrigerant is gas-liquid separated in the flash evaporator 112a, the separated gaseous refrigerant flows out from the second communication port 116 and returns to the inside of the compressor 102 through the air supplement port 106, the separated liquid refrigerant flows from the first communication port 114 to the first throttling element 122, is subjected to secondary throttling and pressure reduction by the first throttling element 122, flows to the first heat exchanger 110, passes through the second valve port 132 and the fourth valve port 136 of the cooling/heating reversing valve 128, and flows back to the compressor 102 through the air suction port 104.

In this embodiment, as shown in fig. 5, the control valve 138 is connected in parallel with the refrigerant radiator 126, an inlet of the control valve 138 is communicated with the first communication port 114 of the flash evaporator 112a, and an outlet of the control valve 138 is connected with the first heat exchanger 110.

Specifically, when the refrigerant system operates in the cooling mode, the control valve 138 stops the flow of the refrigerant, and the refrigerant passes through the heat dissipation evaporator 126 and cools the electronic control unit; when the refrigerant system is operating in the heating mode, the refrigerant flows through the control valve 138 and does not pass through the refrigerant radiator 126.

Specifically, when the refrigerant system operates in the heating mode, the outdoor temperature is inherently low, and the electronic control component does not need to be cooled. Therefore, the control refrigerant directly passes through the control valve 138, and the working efficiency of the refrigerant system can be improved.

In this embodiment, the control valve 138 is a check valve, and the one-way conductivity of the check valve is fully utilized, so that the refrigerant directly flows through the check valve in the heating mode, and the refrigerant flows through the heat dissipation evaporator in the heating mode.

In this embodiment, the refrigerant system may operate in a cooling mode and a heating mode.

Example three:

as shown in fig. 6 and 7, a third embodiment of the present invention provides a refrigerant system, including: the air conditioner comprises a compressor 102, a first heat exchanger 110, an air supplementing device, a second heat exchanger 120, a first throttling element 122, a second throttling element 124 and a refrigerant radiator 126; the gas make-up device employs an economizer 112 b.

As shown in fig. 6 and 7, the compressor 102 includes a suction port 104, an air supplement port 106, and a discharge port 108, the first heat exchanger 110 is disposed between the discharge port 108 of the compressor 102 and the economizer 112b, the second heat exchanger 120 is disposed between the economizer 112b and the suction port 104 of the compressor 102, and the economizer 112b is in communication with the compressor 102 and the air supplement port 106, thereby forming a refrigerant flow path.

The refrigerant discharged from the discharge port 108 passes through the first heat exchanger 110 and then enters the economizer 112b, the refrigerant is subjected to gas-liquid separation in the economizer 112b, the separated gaseous refrigerant returns to the compressor 102 through the gas supplementing port 106, and the separated liquid refrigerant returns to the compressor 102 through the suction port 104 after passing through the second heat exchanger 120.

Further, as shown in fig. 6 and 7, the present embodiment is provided with a first throttling element 122 between the first heat exchanger 110 and the economizer 112b, and a second throttling element 124 between the economizer 112b and the second heat exchanger 120; the refrigerant radiator 126 may be disposed at the following positions: between the first throttling element 122 and the economizer 112b and between the make-up air port 106 and the economizer 112 b.

In this embodiment, the refrigerant discharged from the discharge port 108 passes through the first heat exchanger 110 and enters the economizer 112b, the refrigerant is gas-liquid separated in the economizer 112b, the separated gaseous refrigerant returns to the compressor 102 through the gas supplementing port 106, and the separated liquid refrigerant returns to the compressor 102 through the suction port 104 after passing through the second heat exchanger 120.

In this embodiment, the refrigerant system may operate in a cooling mode.

Example four:

as shown in fig. 8, 9, 10 and 11, a fourth embodiment of the present invention provides a refrigerant system, including: the air conditioner comprises a compressor 102, a first heat exchanger 110, an air supplementing device, a second heat exchanger 120, a first throttling element 122, a second throttling element 124, a refrigerant radiator 126, a cold-warm reversing valve 128 and a reversing device 152; the gas make-up device employs an economizer 112 b.

As shown in fig. 8, 9, 10 and 11, the compressor 102 includes a suction port 104, an air supplement port 106 and a discharge port 108, the first heat exchanger 110 is disposed between the discharge port 108 of the compressor 102 and the economizer 112b, the second heat exchanger 120 is disposed between the economizer 112b and the suction port 104 of the compressor 102, and the economizer 112b is communicated with the compressor 102 and the air supplement port 106 to form a refrigerant flow path.

Further, as shown in fig. 8, 9, 10 and 11, the present embodiment is provided with a first throttling element 122 between the first heat exchanger 110 and the economizer 112b, and a second throttling element 124 between the economizer 112b and the second heat exchanger 120; the refrigerant radiator 126 may be disposed at the following positions: between the first throttling element 122 and the economizer 112b and between the make-up air port 106 and the economizer 112 b.

In this embodiment, as shown in fig. 8, 9, 10 and 11, the nature of the economizer 112b determines that its primary and secondary circuits can only conduct in one direction. Therefore, the cooling system proposed in this embodiment further includes a cooling/heating direction changing valve 128 and a direction changing device 152, the cooling/heating direction changing valve 128 can change the flow path of the cooling medium, and the direction changing device 152 is used in cooperation with the economizer 112b, so that the cooling/heating direction changing valve 128 and the direction changing device 152 are used in cooperation to switch the flow path of the cooling medium between the cooling mode and the heating mode.

As shown in fig. 16 and 17, the cooling/heating direction changing valve 128 includes a first port 130, a second port 132, a third port 134 and a fourth port 136, the first port 130 communicates with the exhaust port 108, the second port 132 communicates with the first heat exchanger 110, the third port 134 communicates with the second heat exchanger 120, and the fourth port 136 communicates with the suction port 104.

As shown in fig. 8, 10, 18 and 19, the reversing device 152 includes a first port 154, a second port 156, a third port 158 and a fourth port 160, the first port 154 is communicated with the first heat exchanger 110, the second port 156 is communicated with the first throttling element 122, the third port 158 is communicated with the second throttling element 124, and the fourth port 160 is communicated with the second heat exchanger 120.

Specifically, as shown in fig. 16 and 18, when the refrigerant system operates in the cooling mode, the first port 130 communicates with the second port 132, the third port 134 communicates with the fourth port 136, the first port 154 communicates with the second port 156, and the third port 158 communicates with the fourth port 160. At this time, the refrigerant flows through the first heat exchanger 110 after passing through the first port 130 and the second port 132 of the cooling/heating reversing valve 128 after coming out of the air outlet of the compressor 102, then passes through the first port 154 and the second port 156 of the reversing device 152, a portion of the refrigerant flows back to the compressor 102 through the air supplement port 106 and the first throttling element 122 and the auxiliary circuit of the economizer 112b, and another portion of the refrigerant flows to the second heat exchanger 120 through the third port 158 and the fourth port 160 of the reversing device after passing through the main circuit and the second throttling element 124 of the economizer 112b, then passes through the third port 134 and the fourth port 136 of the cooling/heating reversing valve 128, and flows back to the inside of the compressor 102 through the air suction port 104.

Specifically, as shown in fig. 9, 11, 17, and 19, when the refrigerant system operates in the heating mode, the first port 130 communicates with the third port 134, the second port 132 communicates with the fourth port 136, the first port 154 communicates with the third port 158, and the second port 156 communicates with the fourth port 160. At this time, the refrigerant flows through the second heat exchanger 120 after passing through the first port 130 and the third port 134 of the cooling/heating reversing valve 128 after coming out of the air outlet of the compressor 102, then passes through the fourth port 160 and the second port 156 of the reversing device, a portion of the refrigerant flows back to the compressor 102 through the air supplement port 106 via the first throttling element 122 and the auxiliary circuit of the economizer 112b, and another portion of the refrigerant flows back to the second heat exchanger 120 through the third port 158 and the first port 154 of the reversing device after passing through the main circuit and the second throttling element 124 of the economizer 112b, then passes through the second port 132 and the fourth port 136 of the cooling/heating reversing valve 128, and flows back to the inside of the compressor 102 through the air suction port 104.

In this embodiment, as shown in fig. 16, 17, 18, and 19, the cooling/heating direction changing valve 128 is a four-way valve, and the direction changing device 152 is a four-way valve that can switch the refrigerant flow path and is easy to operate.

Example five:

as shown in fig. 12, 13, 14 and 15, a fifth embodiment of the present invention provides a refrigerant system, including: the air conditioner comprises a compressor 102, a first heat exchanger 110, an air supplementing device, a second heat exchanger 120, a first throttling element 122, a second throttling element 124, a refrigerant radiator 126, a cold-warm reversing valve 128 and a reversing device 152; the gas make-up device employs an economizer 112 b.

As shown in fig. 12, 13, 14 and 15, the compressor 102 includes a suction port 104, an air supplement port 106 and a discharge port 108, the first heat exchanger 110 is disposed between the discharge port 108 of the compressor 102 and the economizer 112b, the second heat exchanger 120 is disposed between the economizer 112b and the suction port 104 of the compressor 102, and the economizer 112b is in communication with the compressor 102 and the air supplement port 106, thereby forming a refrigerant flow path.

As shown in fig. 12, 13, 14 and 15, the refrigerant discharged from the discharge port 108 passes through the first heat exchanger 110 and enters the economizer 112b, the refrigerant is gas-liquid separated in the economizer 112b, the separated gaseous refrigerant returns to the compressor 102 through the gas supplement port 106, and the separated liquid refrigerant returns to the compressor 102 through the suction port 104 after passing through the second heat exchanger 120.

Further, as shown in fig. 12, 13, 14 and 15, the present embodiment is provided with a first throttling element 122 between the first heat exchanger 110 and the economizer 112b, and a second throttling element 124 between the economizer 112b and the second heat exchanger 120; the refrigerant radiator 126 may be disposed at the following positions: between the first throttling element 122 and the economizer 112b and between the make-up air port 106 and the economizer 112 b.

In this embodiment, the nature of the economizer 112b dictates that its primary and secondary circuits can only conduct in one direction. Therefore, as shown in fig. 12, 13, 14 and 15, the cooling system of the present invention further includes a cooling/heating direction changing valve 128 and a direction changing device 152, such that the cooling/heating direction changing valve 128 can change the flow path of the cooling medium, and the direction changing device 152 is used in cooperation with the economizer 112b, and further, the cooling/heating direction changing valve 128 and the direction changing device 152 are used in cooperation to switch the flow path of the cooling medium between the cooling mode and the heating mode.

As shown in fig. 20, the reversing device 152 includes a first port 154, a second port 156, a third port 158, and a fourth port 160, the first port 154 is in communication with the first heat exchanger 110, the second port 156 is in communication with the first throttling element 122, the third port 158 is in communication with the second throttling element 124, and the fourth port 160 is in communication with the second heat exchanger 120.

Specifically, as shown in fig. 12, 14 and 20, when the refrigerant system operates in the cooling mode, the first port 130 communicates with the second port 132, the third port 134 communicates with the fourth port 136, the first port 154 communicates with the second port 156, and the third port 158 communicates with the fourth port 160. At this time, the refrigerant flows through the first heat exchanger 110 after passing through the first port 130 and the second port 132 of the cooling/heating reversing valve 128 after coming out of the air outlet of the compressor 102, then passes through the first port 154 and the second port 156 of the reversing device, a portion of the refrigerant flows back to the compressor 102 through the air supplement port 106 via the first throttling element 122 and the auxiliary circuit of the economizer 112b, and another portion of the refrigerant flows back to the second heat exchanger 120 through the third port 158 and the fourth port 160 of the reversing device after passing through the main circuit and the second throttling element 124 of the economizer 112b, then passes through the third port 134 and the fourth port 136 of the cooling/heating reversing valve 128, and flows back to the interior of the compressor 102 through the air suction port 104.

Specifically, as shown in fig. 13, 15 and 20, when the refrigerant system operates in the heating mode, the first port 130 communicates with the third port 134, the second port 132 communicates with the fourth port 136, the first port 154 communicates with the third port 158, and the second port 156 communicates with the fourth port 160. At this time, the refrigerant flows through the second heat exchanger 120 after passing through the first port 130 and the third port 134 of the cooling/heating reversing valve 128 after coming out of the air outlet of the compressor 102, then passes through the fourth port 160 and the second port 156 of the reversing device, a portion of the refrigerant flows back to the compressor 102 through the air supplement port 106 via the first throttling element 122 and the auxiliary circuit of the economizer 112b, and another portion of the refrigerant flows back to the second heat exchanger 120 through the third port 158 and the first port 154 of the reversing device after passing through the main circuit and the second throttling element 124 of the economizer 112b, then passes through the second port 132 and the fourth port 136 of the cooling/heating reversing valve 128, and flows back to the inside of the compressor 102 through the air suction port 104.

In this embodiment, as shown in fig. 12 to 15 and 20, the cooling/heating direction changing valve 128 is a four-way valve, and the direction changing device 152 may be a one-way valve assembly composed of four one-way valves instead of the four-way valve, so as to reduce the cost.

Specifically, when the reversing device 152 employs a one-way valve assembly, as shown in fig. 20, the reversing device 152 includes a first one-way valve 162, a second one-way valve 164, a third one-way valve 166, and a fourth one-way valve 168. Wherein the outlet of the third one-way valve 166 is connected to the inlet of the first one-way valve 162 and the outlet of the fourth one-way valve 168 is connected to the inlet of the second one-way valve 164; the first check valve 162 is in one-way communication between the first port 154 and the second port 156; the second check valve 164 is in one-way communication between the fourth port 160 and the second port 156; the third check valve 166 is in one-way communication between the third port 158 and the first port 154; the fourth check valve 168 is in one-way communication between the third port 158 and the fourth port 160. Based on the arrangement, the assembly formed by the four one-way valves can be matched with the economizer 112b for use, and the cold and warm switching of a refrigerant system is ensured.

Specifically, when the refrigerant system operates in the cooling mode, the first check valve 162 and the fourth check valve 168 are opened; when the refrigerant system operates in the heating mode, the second check valve 164 and the third check valve 166 are turned on.

In any of the above embodiments, as shown in fig. 1 to 15, the refrigerant system further includes an accumulator 170. The accumulator 170 is connected to the suction port 104 and is located between the suction port 104 and the second heat exchanger 120. That is, the refrigerant flowing back from the second heat exchanger 120 to the inside of the compressor 102 first passes through the inside of the accumulator 170, so that the accumulator 170 has a good buffering function to protect the compressor 102 to a certain extent.

In any of the above embodiments, further, the first throttling element 122 includes, but is not limited to, the following structures: electronic expansion valve, thermal expansion valve, capillary tube, and throttle sleeve. The throttling components can play a certain throttling and pressure reducing role on the refrigerant, and the cost is lower.

In any of the above embodiments, further, the second throttling element 124 includes, but is not limited to, the following structures: electronic expansion valve, thermal expansion valve, capillary tube, and throttle sleeve. The throttling components can play a certain throttling and pressure reducing role on the refrigerant, and the cost is lower.

In any of the above embodiments, further, the compressor 102 may take a form that may be enhanced vapor injection, independent compression, two-stage compression.

Where compressor 102 is a two-stage compression type, compressor 102 includes a first cylinder 172 and a second cylinder 174, with the first cylinder 172 acting as a high pressure cylinder and the second cylinder 174 acting as a low pressure cylinder. The outlet of the second cylinder 174 is connected to the air inlet of the first cylinder 172, the air inlet of the first cylinder 172 is used as the air supplement port 106, and the volume ratio of the first cylinder 172 to the second cylinder 174 ranges from 40% to 110%.

Example six:

a sixth embodiment of the present invention provides a refrigeration apparatus including: an electrical control component; and the refrigerant system according to any of the above embodiments, the refrigerant radiator is opposite to the electric control component (not shown in this embodiment).

The refrigeration plant that the invention proposes includes: an electric control part and a refrigerant system as in any of the above embodiments. Therefore, the overall beneficial effects of the refrigerant system are not discussed herein.

The refrigerant radiator is in contact with the electric control component, and the electric control component and the refrigerant radiator are in contact with each other through a flat plate to dissipate heat.

Specifically, the refrigeration equipment provided by the invention is a variable frequency air conditioner.

Example seven:

the invention provides a refrigerant system applicable to refrigeration equipment. Wherein, refrigerant system includes: the compressor 102, the first heat exchanger 110, the second heat exchanger 120, the air supply device and the refrigerant radiator 126; the second communication port 116 of the air supplement device is connected with the air supplement port 106 of the compressor 102, a first throttling element 122 is connected between the first communication port 114 of the air supplement device and the first heat exchanger 110 in series, and a second throttling element 124 is connected between the third communication port 118 of the air supplement device and the second heat exchanger 120 in series.

The refrigerant radiator 126 is connected in series between the first throttling element 122 and the air make-up device, or the refrigerant radiator 126 is connected in series between the second throttling element 124 and the air make-up device, or the refrigerant radiator 126 is connected in series between the second communication port 116 of the air make-up device and the air make-up port 106 of the compressor 102.

The refrigerant system provided by the invention can effectively dissipate heat of the electric control component, improves refrigeration energy efficiency, reduces exhaust temperature, widens operation range and the like. The first throttling element 122 and the second throttling element 124 may be any one of an electronic expansion valve, a thermal expansion valve, a capillary tube, a throttling stub, and the like. The refrigerant radiator 126 is integrated with the electric control component, and the refrigerant radiator 126 dissipates heat of the electric control component.

Further, the gas supplementing device may employ the flash evaporator 112a or the economizer 112 b. As shown in fig. 1 to 5, when the vapor replenishing device employs the flash evaporator 112a, the first communication port 114, the second communication port 116, and the third communication port 118 may flow in both directions during cooling and heating; as shown in fig. 6 to 15, when the economizer 112b is used as the air-replenishing device, the first communication port 114 and the second communication port 116 in the sub-passage are communicated, the fourth communication port 140 and the third communication port 118 in the main passage are communicated, and the main passage and the sub-passage can flow only in one direction. Therefore, the cooling/heating switching valve 128 and the switching device 152 need to be mounted during the cooling/heating switching, and the cooling/heating switching valve 128 and the switching device 152 may be a four-way valve or a combination of a plurality of check valves.

In addition, as shown in fig. 6 to 15, when the air supplement device employs the flash evaporator 112a, the refrigerant system further includes a check valve connected in parallel with the refrigerant radiator 126, the check valve blocks the circulation of the refrigerant during cooling, and the refrigerant flows through the check valve during heating.

The refrigeration plant that the invention proposes includes: the heat exchanger comprises a compressor 102, a first heat exchanger 110, a second heat exchanger 120, a first throttling element 122, a second throttling element 124, an air supplementing device, a refrigerant radiator 126, an electric control component and the like.

Compressor 102 includes suction port 104, make-up port 106, discharge port 108; the air inlet 104, the air supply port 106 and the air outlet 108 are communicated with the first heat exchanger 110 and the second heat exchanger 120 through a cooling/heating switching valve 128. Compressor 102 may be in the form of enhanced vapor injection, independent compression, two-stage compression.

When the compressor adopts two-stage compression, the value range of the volume ratio of the high-pressure-stage cylinder to the low-pressure-stage cylinder is 40-110%; two cylinders are arranged in the compressor 102, and the two cylinders are connected in series; thus, the refrigerant is sucked from a suction port of the compressor 102, enters the second cylinder 174 for compression, is discharged from the second cylinder 174 after being compressed to the intermediate pressure, enters the first cylinder 172, and is discharged after being compressed from the intermediate pressure to the discharge pressure by the first cylinder 172; the compression mode in which two cylinders are sequentially compressed is called two-stage compression, in which the second cylinder 174 is a low-pressure stage cylinder and the first cylinder 172 is a high-pressure stage cylinder.

One end of the first heat exchanger 110 is in communication with the discharge port 108 of the compressor 102; one end of the second heat exchanger 120 communicates with the suction port 104 of the compressor 102; the air make-up device may be of the flash vessel 112a or economizer 112b type, among others.

As shown in fig. 1-5, when the gas replenishing device takes the form of a flash evaporator 112a, it has a first communication port 114, a second communication port 116, and a third communication port 118; the first communication port 114 is communicated with the other end of the first heat exchanger 110, and a first throttling element 122 is arranged on a connection pipeline of the first communication port; the third communicating port 118 is communicated with the other end of the second heat exchanger 120, and a second throttling element 124 is arranged on a connecting pipeline of the third communicating port and the second heat exchanger; the second communication port 116 communicates with the air replenishment port 106. The refrigerant radiator 126 is disposed at one of the following three positions: between the first throttling element 122 and the first communication port 114, between the second throttling element 124 and the third communication port 118, and between the relief port 106 and the second communication port 116.

As shown in fig. 6 to 15, when the gas replenishing device takes the form of the economizer 112b, it has four communication ports, a first communication port 114, a second communication port 116, and a third communication port 118. The fourth communication port 140 and the third communication port 118 form a main passage (tube side), and the first communication port 114 and the second communication port 116 form a sub passage (shell side). The throttled refrigerant enters the economizer 112b from the first communication port 114, the evaporated refrigerant gas flows out of the economizer 112b from the second communication port 116 into the charge port 106 of the compressor 102, the refrigerant liquid enters the economizer 112b from the fourth communication port 140, and the supercooled refrigerant liquid flows out of the economizer 112b from the third communication port 118 and enters the compressor 102 through the suction port 104.

The reversing device 152 ensures unidirectional flow of the economizer 112b, having four transfer ports: a first interface 154, a second interface 156, a third interface 158, and a fourth interface 160. The first port 154 is connected to the first heat exchanger 110, the second port 156 is connected to the first throttling element 122, the third port 158 is connected to the second throttling element 124, and the fourth port 160 is connected to the second heat exchanger 120.

As shown in fig. 18 and 19, the direction switching device 152 has two conducting states, in the first conducting state, the third port 158 and the fourth port 160 in the direction switching device 152 are communicated, and the first port 154 and the second port 156 in the direction switching device 152 are communicated; in the second conduction state, the second port 156 and the fourth port 160 of the cooling/heating switching valve 128 are communicated, and the first port 154 and the third port 158 are communicated.

The reversing device 152 may be a four-way valve or may be replaced by four one-way valves.

As shown in fig. 18 and 19, when a four-way valve is used as the direction switching device 152, it has two conduction states, in the first conduction state, the third port 158 and the fourth port 160 are communicated, and the first port 154 and the second port 156 are communicated; in the second on state, the second port 156 communicates with the fourth port 160, and the first port 154 communicates with the third port 158.

As shown in fig. 20, when 4 check valves are used to form the reversing device 152, the reversing device has a first check valve 162, a second check valve 164, a third check valve 166, and a fourth check valve 168, and the first check valve 162 to the fourth check valve 168 are used in cooperation.

As shown in fig. 6 and 8, the refrigerant radiator 126 is disposed at one of the following two positions: between the first throttling element 122 and the first communication port 114, and between the charging port 106 and the second communication port 116. The refrigerant radiator 126 is in contact connection with a substrate of the variable frequency controller, so that the purpose of radiating the electric control component by using the refrigerant radiator 126 is achieved.

The two-stage compression can improve the energy efficiency of the system capacity, and the refrigerant radiator 126 is overlapped and arranged at the three positions to cool the electric control part, so that the temperature of the electric control part is lower, the running frequency of the compressor 102 can be further improved, the system capacity output is improved, and the refrigerant radiator 126 is arranged on the connecting pipelines of the three interfaces of the air supply device, so that the arrangement mode has little influence on the performance and the refrigerant radiating effect is good.

The first embodiment is as follows:

referring to fig. 5, the embodiment of the invention will be described by taking the flash evaporator 112a as an air make-up device, and the refrigerant system has a heating mode and a cooling mode.

As shown in fig. 5, the refrigerating apparatus includes: the system comprises a two-stage compressor, a cold-warm reversing valve 128, a first heat exchanger 110, a second heat exchanger 120, a flash evaporator 112a, a first throttling element 122, a second throttling element 124 and a refrigerant radiator 126. Wherein the two-stage compressor includes: the air cylinder comprises a shell, a low-pressure-stage air cylinder, a high-pressure-stage air cylinder and a liquid storage device 170, wherein an air outlet 108 is formed in the shell, the low-pressure-stage air cylinder and the high-pressure-stage air cylinder are respectively arranged in the shell, the liquid storage device 170 is arranged outside the shell, and an air suction port of the low-pressure-stage air cylinder is communicated with the liquid storage device 170. The exhaust port 108 of the low-pressure stage cylinder is communicated with the high-pressure stage cylinder, compressed refrigerants discharged from the low-pressure stage cylinder enter the high-pressure stage cylinder to be compressed, and the refrigerants compressed by the high-pressure stage cylinder are discharged into the shell and then are discharged from the exhaust port 108.

As shown in fig. 5, the volume ratio of the high-pressure stage cylinder to the low-pressure stage cylinder ranges from 40% to 110%. Further, the exhaust volume ratio of the high-pressure-stage cylinder to the low-pressure-stage cylinder ranges from 50% to 90%, and preferably, the exhaust volume ratio of the high-pressure-stage cylinder to the low-pressure-stage cylinder ranges from 65% to 80%. For example, the ratio of the exhaust volumes of the high-pressure stage cylinder and the low-pressure stage cylinder may be 65%, 70%, 75%, or 80%.

As shown in fig. 5, the cooling/heating direction changing valve 128 includes: a first port 130, a second port 132, a third port 134, and a fourth port 136. Wherein the first port 130 is in communication with one of the second port 132 and the third port 134, the fourth port 136 is in communication with the other of the second port 132 and the third port 134, the first port 130 is connected to the exhaust port 108, and the fourth port 136 is connected to the reservoir 170. Specifically, when the cooling and heating type refrigeration device is used for refrigerating, the first valve port 130 is communicated with the second valve port 132, and the third valve port 134 is communicated with the fourth valve port 136; when the cooling and heating type refrigerating device is heating, the first port 130 is communicated with the third port 134, and the second port 132 is communicated with the fourth port 136. Preferably, the cold-warm changing valve 128 is a four-way valve.

As shown in fig. 5, the flash evaporator 112a includes: a first communication port 114, a second communication port 116, and a third communication port 118. The second communication port 116 is connected with the air supplementing port 106 of the high-pressure-stage cylinder, the first communication port 114 is connected with the first heat exchanger 110, and the third communication port 118 is connected with the second heat exchanger 120; a first throttling element 122 with adjustable opening degree is connected in series between the first communication port 114 and the first heat exchanger 110, and a second throttling element 124 with adjustable opening degree is connected in series between the third communication port 118 and the second heat exchanger 120.

Alternatively, the first throttling element 122 is an electronic expansion valve and the second throttling element 124 is an electronic expansion valve. It is understood that the first throttle element 122 and the second throttle element 124 may be other adjustable opening elements, such as a thermal expansion valve.

As shown in fig. 5, the refrigerant radiator 126 is used for radiating heat from the electronic control unit, and the refrigerant radiator 126 is connected in series between the first throttling element 122 and the first communication port 114. It is understood that the structure of the refrigerant radiator 126 may be varied as long as the refrigerant can flow, and for example, the refrigerant radiator 126 may include a metal pipe extending in a serpentine manner.

As shown by solid arrows in fig. 5, when the cooling and heating type refrigeration apparatus performs refrigeration, the high-temperature and high-pressure refrigerant discharged from the discharge port 108 of the two-stage compressor is discharged into the first heat exchanger 110 through the first valve port 130 and the second valve port 132 to be condensed and radiated, and after the liquid-state refrigerant discharged from the first heat exchanger 110 is subjected to the first-stage throttling and pressure reduction by the first throttling element 122, the liquid-state refrigerant is discharged into the flash evaporator 112a from the first communication port 114 to be subjected to gas-liquid separation, and the separated intermediate-pressure gaseous refrigerant is discharged into the high-pressure-stage cylinder from the gas outlet to be compressed. After the intermediate-pressure liquid refrigerant discharged from the gas-liquid separator is subjected to secondary throttling and pressure reduction by the second throttling element 124, the intermediate-pressure liquid refrigerant is discharged into the second heat exchanger 120 for heat exchange so as to reduce the indoor ambient temperature, the refrigerant discharged from the second heat exchanger 120 enters the accumulator 170 through the third valve port 134 and the fourth valve port 136, and the refrigerant enters the low-pressure cylinder from the accumulator 170 for compression.

As shown by the dotted arrows in fig. 5, when the cooling and heating type refrigeration apparatus is heating, the high-temperature and high-pressure refrigerant discharged from the discharge port 108 of the two-stage compressor is discharged into the second heat exchanger 120 through the first valve port 130 and the third valve port 134 to be condensed and radiated, so as to raise the indoor ambient temperature, the high-pressure liquid refrigerant discharged from the second heat exchanger 120 is depressurized through the first throttling of the second throttling element 124, then discharged into the gas-liquid separator from the third communication port 118 to be subjected to gas-liquid separation, and the separated intermediate-pressure gaseous refrigerant is discharged into the high-pressure stage cylinder from the charge port 106 to be compressed. The intermediate-pressure liquid refrigerant discharged from the first port 114 of the gas-liquid separator is subjected to secondary throttling and pressure reduction by the first throttling element 122, and then is fed into the first heat exchanger 110 for heat exchange, the refrigerant discharged from the first heat exchanger 110 is discharged into the accumulator 170 through the second valve port 132 and the fourth valve port 136, and the refrigerant discharged from the accumulator 170 is discharged into the low-pressure cylinder for compression.

As shown by the dotted arrows in fig. 5, when the cooling and heating type refrigeration apparatus heats, the refrigerant radiator 126 is connected in series between the first throttling element 122 and the first port, and the refrigerant radiator 126 is connected in parallel with a check valve, and the liquid refrigerant discharged from the gas-liquid separator, which is subjected to primary throttling and pressure reduction and gas-liquid separation, passes through the check valve, so that the refrigerant does not pass through the refrigerant radiator 126, and therefore the refrigerant radiator 126 does not perform a heat dissipation function during heating, mainly, the general outdoor temperature is low during heating, and the electronic control temperature is relatively low, so that it is generally not necessary to enhance heat dissipation for electronic control, and the refrigerant is bypassed through the check valve, and the system performance is higher.

From this analysis can know, when cold-warm type refrigerating plant moves, the refrigerant of different pressure states enters into low pressure level cylinder and high-pressure stage cylinder respectively, and the refrigerant carries out first compression to low pressure level cylinder refrigerant earlier, then carries out the second compression to high pressure level cylinder again, and the refrigerant after the compression that the high pressure stage cylinder was discharged is discharged from gas vent 108 behind the casing, and the value range of the exhaust volume ratio of high pressure level cylinder and low pressure level cylinder is 65% to 80%, can make low temperature heating volume promote by a wide margin like this through two compressions.

Meanwhile, the flash evaporator 112a is arranged between the first heat exchanger 110 and the second heat exchanger 120, so that a part of gaseous refrigerant is separated by the flash evaporator 112a and then discharged back to the high-pressure cylinder for compression, the content of gas flowing into the second heat exchanger 120 during refrigeration is reduced, the content of gas flowing into the refrigerant of the second heat exchanger 120 during heating is reduced, and the influence of the gaseous refrigerant on the heat exchange performance of the second heat exchanger 120 or the first heat exchanger 110 serving as an evaporator is reduced, thereby improving the heat exchange efficiency and reducing the compression power consumption of the compressor 102.

The second embodiment is as follows:

with reference to fig. 6 to 15, the present embodiment explains the technical solution of the present invention by taking the economizer 112b as an air make-up device and the refrigerant system having a heating mode and a cooling mode as an example.

The refrigeration apparatus includes: the air conditioner comprises a compressor 102, a cold-warm reversing valve 128, a first heat exchanger 110, a second heat exchanger 120, an economizer 112b, a reversing device 152, a first throttling element 122, a second throttling element 124 and a refrigerant radiator 126.

Wherein, compressor 102 includes: the device comprises a shell and a reservoir 170, wherein the shell is provided with an exhaust port 108, an air suction port 104 and an air supplement port 106; the reservoir 170 is connected to the housing; the type of the compressor 102 can be in forms of enhanced vapor injection, independent compression, two-stage compression and the like, the number and the internal structure of cylinders in the compressor are not limited, and when the two-stage compression form is adopted, a low-pressure-stage cylinder and a high-pressure-stage cylinder are respectively arranged in a shell; the reservoir 170 is disposed outside the housing, and the low pressure stage cylinder is in communication with the reservoir 170. The outlet of the low-pressure stage cylinder is communicated with the high-pressure stage cylinder, compressed refrigerant discharged from the low-pressure stage cylinder enters the high-pressure stage cylinder to be compressed, and the refrigerant compressed by the high-pressure stage cylinder is discharged into the shell and then discharged from the exhaust port 108.

The volume ratio of the high-pressure stage cylinder to the low-pressure stage cylinder ranges from 40% to 110%. Further, the exhaust volume ratio of the high-pressure-stage cylinder to the low-pressure-stage cylinder ranges from 50% to 90%, and preferably, the exhaust volume ratio of the high-pressure-stage cylinder to the low-pressure-stage cylinder ranges from 65% to 80%. For example, the ratio of the exhaust volumes of the high-pressure stage cylinder and the low-pressure stage cylinder may be 65%, 70%, 75%, or 80%.

As shown in fig. 16 and 17, the cooling/heating direction changing valve 128 includes: a first port 130, a second port 132, a third port 134, and a fourth port 136. The cold-warm reversing valve 128 has two conducting states, in the first conducting state, the first port 130 is communicated with the second port 132, and the third port 134 is communicated with the fourth port 136; in the second conduction state, the first port 130 is in communication with the third port 134, and the second port 132 is in communication with the fourth port 136. The first port 130 of the cooling/heating direction changing valve 128 is connected to the exhaust port 108 of the compressor 102, the fourth port 136 of the cooling/heating direction changing valve 128 is connected to the accumulator 170, the third port 134 of the cooling/heating direction changing valve 128 is connected to one end of the second heat exchanger 120, and the second port 132 of the cooling/heating direction changing valve 128 is connected to one end of the first heat exchanger 110.

The economizer 112b is a heat exchanger having four communication ports, namely, a first communication port 114, a second communication port 116, a third communication port 118, and a fourth communication port 140, wherein the fourth communication port 140 and the third communication port 118 form a main path (tube side) therebetween, and the first communication port 114 and the second communication port 116 form another sub path (shell side) therebetween. The throttled refrigerant enters the economizer 112b from the first communication port 114, the evaporated refrigerant gas flows out of the economizer 112b from the second communication port 116 into the charge port 106 of the compressor 102, the refrigerant liquid enters the economizer 112b from the fourth communication port 140, and the supercooled refrigerant liquid flows out of the economizer 112b from the third communication port 118. The economizer 112b has a function of ensuring that the flow can only flow from the direction of the inlet → the outlet of the main road and the auxiliary road, namely, the flow can only flow in one direction to ensure the heat exchange function.

As shown in fig. 18 and 19, the reversing device 152 ensures unidirectional flow of the economizer 112b, having four transfer ports: a first interface 154, a second interface 156, a third interface 158, and a fourth interface 160. The first port 154 is connected to one end of the first heat exchanger 110, the fourth port 160 is connected to one end of the second heat exchanger 120, the second port 156 is connected to the first throttling element 122, and the third port 158 is connected to the second throttling element 124. The direction switching device 152 has two conducting states, as shown in fig. 18, in the first conducting state, the third port 158 and the fourth port 160 in the direction switching device 152 are communicated, and the first port 154 and the second port 156 in the direction switching device 152 are communicated; as shown in fig. 19, in the second conduction state, the second port 156 and the fourth port 160 communicate with each other, and the first port 154 and the third port 158 communicate with each other in the cooling/heating direction switching valve 128.

In all embodiments, when the compressor 102 is operating: refrigerant gas enters the compressor 102 through the gas inlet 106 of the compressor 102, is compressed to an intermediate pressure state, then enters the cylinder and is mixed with gas at the intermediate pressure, and then is compressed to a high pressure state together, and finally is discharged out of the compressor 102 through the gas outlet 108 of the compressor 102.

As shown in fig. 9, 11, 13, and 15, in the heating mode, the cooling/heating switching valve 128 is in the second conduction state, and the switching device 152 is in the second conduction state. In this case, the circulation path of the refrigerant outside the compressor 102 is: the high-pressure refrigerant gas sequentially passes through the discharge port 108 of the compressor 102 → the first valve port 130 of the cooling/heating switching valve 128 → the third valve port 134 of the cooling/heating switching valve 128, and enters the second heat exchanger 120, where the refrigerant is condensed into high-pressure liquid in the second heat exchanger 120, and simultaneously, heat is released to heat the indoor air (i.e., to generate a heating effect). The high pressure fluid exiting the second heat exchanger 120 is split into two paths after passing through the fourth port 160 → the second port 156 of the reversing device 152.

The 1 st path refrigerant liquid throttled by the first throttling element 122 enters the sub-path (first communication port 114 → second communication port 116) of the economizer 112b to become a refrigerant of a certain intermediate pressure. The intermediate pressure refrigerant enters the shell side of the economizer 112b through the first communication port 114 of the economizer 112b, the intermediate pressure refrigerant evaporates and cools the refrigerant on the tube side of the economizer 112b on the shell side of the economizer 112b, and the evaporated intermediate pressure refrigerant gas flows into the refrigerant radiator 126 to exchange heat with the electric control component, and then is injected into the compressor 102 through the air supplement port 106 of the compressor 102.

The 2 nd refrigerant liquid enters the first heat exchanger 110 through the fourth communication port 140 of the economizer 112b, the tube side (main path) of the economizer 112b, the third communication port 118 of the economizer 112b, the second throttling element 124, the third port 158 of the reversing device 152 → the first port 154 in this order. On the tube side of the economizer 112b, the refrigerant is cooled by the refrigerant evaporated on the shell side (bypass), and the degree of supercooling increases. The sub-cooled refrigerant liquid is throttled and depressurized while passing through the second throttling element 124, and becomes a low-pressure gas-liquid mixture. This low pressure gas-liquid mixture evaporates and absorbs heat in the second heat exchanger 120 through the third port 158 → the first port 154 of the reversing device 152, thereby cooling the outdoor air (i.e., producing a cooling effect). The evaporated refrigerant turns into low-pressure gas and finally returns to the inside of the compressor 102 through the second port 132 and the fourth port 136 of the cooling/heating switching valve 128 → the accumulator 170 → the suction port 104 of the compressor 102, thereby constituting a complete heating cycle.

As shown in fig. 8, 10, 12 and 14, in the cooling mode, the cooling/heating direction change valve 128 is in the first conduction state, and the direction change device 152 is in the first conduction state. In this case, the circulation path of the refrigerant outside the compressor 102 is: the high-pressure refrigerant gas sequentially passes through the discharge port 108 of the compressor 102 → the first port 130 of the cooling/heating switching valve 128 → the second port 132 to enter the first heat exchanger 110, where the refrigerant is condensed into high-pressure liquid in the first heat exchanger 110, and simultaneously releases heat to heat the outdoor air (i.e., to generate a heating effect). The high pressure fluid exiting the first heat exchanger 110 is split into two paths after passing through the first port 154 → the second port 156 of the reversing device 152:

the 1 st path refrigerant liquid is throttled by the first throttling element 122 and enters the sub-path of the economizer 112b to become a refrigerant of some intermediate pressure. The intermediate pressure refrigerant enters the shell side of the economizer 112b through the first communication port 114 of the economizer 112b, the intermediate pressure refrigerant evaporates and cools the refrigerant on the tube side of the economizer 112b on the shell side of the economizer 112b, and the evaporated intermediate pressure refrigerant gas flows into the refrigerant radiator 126 to exchange heat with the electric control component, and then is injected into the compressor 102 through the air supplement port 106 of the compressor 102.

The 2 nd refrigerant liquid enters the second heat exchanger 120 through the fourth communication port 140 of the economizer 112b, the tube side (main path) of the economizer 112b, the third communication port 118 of the economizer 112b, the second throttling element 124, the third port 158 of the reversing device 152 → the fourth port 160 in this order. On the tube side of the economizer 112b, the refrigerant is cooled by the refrigerant evaporated on the shell side (bypass), and the degree of supercooling increases. The sub-cooled refrigerant liquid is throttled down to become a low-pressure gas-liquid mixture while passing through the first throttling element 122. This low pressure vapor-liquid mixture evaporates and absorbs heat in the first pass through the first port 154 → the second port 156 of the reversing device 152, cooling the room air (i.e., creating a cooling effect). The evaporated refrigerant becomes a low-pressure gas and finally returns to the inside of the compressor 102 through the third port 134 → the fourth port 136 of the cooling/heating switching valve 128 → the accumulator 170 → the suction port 104 of the compressor 102, thereby constituting a complete refrigeration cycle.

As shown in fig. 20, when the reversing device 152 employs a one-way valve assembly, the reversing device 152 includes a first one-way valve 162, a second one-way valve 164, a third one-way valve 166, and a fourth one-way valve 168. The first check valve 162 is in one-way communication between the first port 154 and the second port 156, the second check valve 164 is in one-way communication between the fourth port 160 and the second port 156, the third check valve 166 is in one-way communication between the third port 158 and the first port 154, and the fourth check valve 168 is in one-way communication between the third port 158 and the fourth port 160.

As shown in fig. 12 and 14, in the case that the refrigerant system operates in the cooling mode, the first check valve 162 and the fourth check valve 168 are in an open state; as shown in fig. 13 and 15, in the case where the refrigerant system operates in the heating mode, the third check valve 166 and the third check valve 166 are in the open state. Based on the arrangement, the cost of the refrigerant system can be further reduced on the basis of ensuring the conversion of the refrigerant system.

Specifically, as shown in fig. 20, the outlet of the third one-way valve 166 is connected to the inlet of the first one-way valve 162, and the outlet of the fourth one-way valve 168 is connected to the inlet of the second one-way valve 164.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A refrigerant system, comprising:

a compressor including an air suction port, an air supplement port, and an air discharge port;

one end of the first heat exchanger is communicated with the exhaust port;

the air supplementing device is communicated with the other end of the first heat exchanger and the air supplementing port;

the second heat exchanger is communicated with the air suction port and the air supplementing device;

the first throttling element is arranged between the first heat exchanger and the air supplementing device;

the second throttling element is arranged between the air supplementing device and the second heat exchanger;

and the refrigerant radiator is communicated with the air supplementing device and is positioned between the air supplementing device and the air supplementing port or between the first throttling element and the air supplementing device.

2. The refrigerant system as claimed in claim 1,

the air supply device is a flash evaporator;

the refrigerant radiator is positioned between the first throttling element and the flash evaporator; or

The refrigerant radiator is positioned between the second throttling element and the flash evaporator; or

The refrigerant radiator is positioned between the air supplementing port and the flash evaporator.

3. The refrigerant system as claimed in claim 2, wherein the flash evaporator comprises:

a first communication port in communication with the first throttling element;

the second communication port is communicated with the air supplementing port;

a third communication port in communication with the second throttling element.

4. The refrigerant system as claimed in claim 1, further comprising:

the cooling and heating reversing valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is communicated with the exhaust port, the second valve port is communicated with the first heat exchanger, the third valve port is communicated with the second heat exchanger, and the fourth valve port is communicated with the air suction port;

the refrigerant system operates in a refrigeration mode, the first valve port is communicated with the second valve port, and the third valve port is communicated with the fourth valve port; the refrigeration system operates in a heating mode, the first valve port is communicated with the third valve port, and the second valve port is communicated with the fourth valve port.

5. The refrigerant system as claimed in claim 3, further comprising:

the control valve is connected with the refrigerant radiator in parallel, the refrigerant system operates in a refrigeration mode, the control valve stops the circulation of the refrigerant, the refrigerant system operates in a heating mode, and the refrigerant flows through the control valve.

6. The refrigerant system as claimed in claim 5,

the control valve is a one-way valve which is in one-way communication in the direction from the second throttling element to the first throttling element.

7. The refrigerant system as claimed in claim 1,

the air supply device is an economizer;

the refrigerant radiator is positioned between the economizer and the air supplementing port; or

The refrigerant radiator is located between the first throttling element and the economizer.

8. The refrigerant system as set forth in claim 7, wherein the economizer includes:

a first communication port in communication with the first throttling element;

the second communication port is communicated with the air supplementing port;

a third communication port in communication with the second throttling element;

the fourth communication port is connected with the first heat exchanger;

the first communication port is communicated with the second communication port to form an auxiliary path of the economizer, the fourth communication port is communicated with the third communication port to form a main path of the economizer, and the refrigerant radiator is communicated with the auxiliary path of the economizer.

9. The refrigerant system as claimed in claim 8, further comprising:

the reversing device comprises a first interface, a second interface, a third interface and a fourth interface, the first interface is communicated with the first heat exchanger, the second interface is communicated with the first throttling element, the third interface is communicated with the second throttling element, and the fourth interface is communicated with the second heat exchanger;

the refrigerant system operates in a refrigeration mode, the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the refrigerant system operates in a heating mode, the first valve port is communicated with the third valve port, the second valve port is communicated with the fourth valve port, the first interface is communicated with the third interface, and the second interface is communicated with the fourth interface.

10. The refrigerant system as claimed in claim 9,

the cold and warm reversing valve is a four-way valve; and/or

The reversing device is a four-way valve.

11. The refrigerant system as claimed in claim 9, wherein the reversing device comprises:

the first one-way valve is in one-way communication between the first interface and the second interface;

the second one-way valve is in one-way communication between the fourth interface and the second interface;

the third one-way valve is in one-way communication between the third interface and the first interface;

and the fourth one-way valve is communicated between the third interface and the fourth interface in a one-way mode.

12. The refrigerant system as claimed in any one of claims 1 to 11,

the first throttling element is one or a combination of the following components: the electronic expansion valve, the thermostatic expansion valve, the capillary tube and the throttling short tube; and/or

The second throttling element is one or a combination of the following components: the electronic expansion valve, the thermostatic expansion valve, the capillary tube and the throttling short tube; and/or

The compressor is one of the following or a combination thereof: the system comprises an enhanced vapor injection compressor, an independent compressor and a two-stage compressor.

13. A refrigeration apparatus, comprising:

an electrical control component; and

the refrigerant system as claimed in any one of claims 1 to 12, wherein the refrigerant radiator is in contact with the electrical control component.