Refrigerant circulation system and electrical equipment

Abstract

The utility model relates to a refrigerant circulation system and electrical equipment, the refrigerant circulation system comprises a compressor, a first heat exchanger and a second heat exchanger, and the compressor, the first heat exchanger and the second heat exchanger are connected to form a refrigerant circulation loop; the refrigerant circulating system further comprises a bypass branch, the first end of the bypass branch is connected between the compressor and the first heat exchanger, the second end of the bypass branch is connected between the second heat exchanger and the compressor, and an adjusting device is arranged on the bypass branch and used for adjusting the flow of the refrigerant circulating on the refrigerant circulating loop. Through the design, the adjusting device can be connected with the low-pressure end and the high-pressure end in the refrigerant circulation loop at the same time, so that the flow of the refrigerant circulating on the refrigerant circulation loop is adjusted more pertinently, the adjusting efficiency of the adjusting device on the flow of the refrigerant is improved, and the heat exchange efficiency of the refrigerant circulation system can be further improved.

Description

Technical Field

[0001] The present disclosure relates to the field of household appliances, and in particular to a refrigerant circulation system and electrical equipment. Background Art

[0002] For example, refrigerators, air conditioners and other electrical appliances have refrigerant circulation systems, which realize the heat exchange requirements of cooling or heating through the circulation of refrigerant. At present, the amount of refrigerant injected into the refrigerant circulation system is a fixed value, and the amount of refrigerant participating in the circulation is different at different ambient temperatures, which causes the amount of refrigerant participating in the circulation in the refrigerant circulation system to be unable to adapt to the change of ambient temperature, thereby reducing the heat exchange efficiency of the refrigerant circulation system.

[0003] Based on this, in the related art, a regulating device is provided on the refrigerant circulation system to control the amount of the refrigerant involved in the circulation. However, the regulating device in the related art has a poor control effect on the amount of the refrigerant, resulting in limited improvement in heat exchange efficiency. Utility Model Content

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a refrigerant circulation system and electrical equipment.

[0005] According to a first aspect of the present disclosure, a refrigerant circulation system is provided, which includes a compressor, a first heat exchanger and a second heat exchanger, wherein the compressor, the first heat exchanger and the second heat exchanger are connected to form a refrigerant circulation loop; the refrigerant circulation system also includes a bypass branch, wherein a first end of the bypass branch is connected between the compressor and the first heat exchanger, and a second end of the bypass branch is connected between the second heat exchanger and the compressor, and a regulating device is provided on the bypass branch, and the regulating device is used to regulate the flow rate of the refrigerant circulating in the refrigerant circulation loop.

[0006] In some embodiments of the present disclosure, the regulating device includes a refrigerant storage part, a first switch and a second switch, the first switch is arranged between the refrigerant storage part and the first end of the bypass branch, and the second switch is arranged between the refrigerant storage part and the second end of the bypass branch.

[0007] In some embodiments of the present disclosure, the refrigerant circulation system is a refrigeration system, the first heat exchanger is a condenser, the second heat exchanger is an evaporator, the first switch is a first pressure switch, and the first pressure switch is configured to open when the pressure on the refrigerant inlet side of the first pressure switch is equal to or higher than a first preset pressure, and the second switch is a second pressure switch, and the second pressure switch is configured to open when the pressure on the refrigerant outflow side of the second pressure switch is equal to or lower than a second preset pressure.

[0008] In some embodiments of the present disclosure, the refrigerant circulation system is a heating system, the first heat exchanger is an evaporator, the second heat exchanger is a condenser, the first switch is a third pressure switch, and the third pressure switch is configured to open when the pressure on the refrigerant inlet side of the third pressure switch is equal to or higher than a third preset pressure, and the second switch is a fourth pressure switch, and the fourth pressure switch is configured to open when the pressure on the refrigerant outflow side of the fourth pressure switch is equal to or lower than a fourth preset pressure.

[0009] In some embodiments of the present disclosure, the refrigerant circulation system further includes: a temperature sensor, which is used to detect the ambient temperature; and a controller, which is electrically connected to the temperature sensor, the first switch, and the second switch.

[0010] In some embodiments of the present disclosure, the refrigerant circulation system also includes a four-way valve, a first end of the four-way valve is connected to the exhaust port of the compressor through a first pipeline, a second end of the four-way valve is connected to the intake port of the compressor through a second pipeline, a third end of the four-way valve is connected to one end of the first heat exchanger through a third pipeline, a fourth end of the four-way valve is connected to one end of the second heat exchanger through a fourth pipeline, and the other end of the first heat exchanger is connected to the other end of the second heat exchanger through a fifth pipeline; a first end of the bypass branch is connected to the first pipeline or the third pipeline, and a second end of the bypass branch is connected to the second pipeline or the fourth pipeline.

[0011] In some embodiments of the present disclosure, the first end of the bypass branch is connected to the first pipeline, the first switch is a fifth pressure switch, and the fifth pressure switch is configured to open when the pressure on the refrigerant inlet side of the fifth pressure switch is equal to or higher than a fifth preset pressure; the second end of the bypass branch is connected to the second pipeline, the second switch is a sixth pressure switch, and the sixth pressure switch is configured to open when the pressure on the refrigerant outlet side of the sixth pressure switch is equal to or lower than a sixth preset pressure.

[0012] In some embodiments of the present disclosure, the regulating device includes a refrigerant storage part, a first refrigerant driving device and a second refrigerant driving device, the first refrigerant driving device is arranged between the refrigerant storage part and the first end of the bypass branch, and the second refrigerant driving device is arranged between the refrigerant storage part and the second end of the bypass branch.

[0013] In some embodiments of the present disclosure, the refrigerant circulation system further includes: a temperature sensor, which is used to detect the ambient temperature; and a controller, which is electrically connected to the temperature sensor, the first refrigerant driving device, and the second refrigerant driving device.

[0014] According to a second aspect of the present disclosure, an electrical device is provided, wherein the electrical device comprises a refrigerant circulation system as described in the first aspect.

[0015] In some embodiments of the present disclosure, the electrical device includes a refrigerator, an air conditioner, or a heat pump water heater.

[0016] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0017] The refrigerant circulation system provided by the embodiment of the present disclosure is provided with a refrigerant circulation loop and a bypass branch, wherein the first end of the bypass branch is connected between the compressor and the first heat exchanger, and the second end of the bypass branch is connected between the second heat exchanger and the compressor, and a regulating device is provided on the bypass branch to regulate the flow of the refrigerant circulating in the refrigerant circulation loop. With such a design, the regulating device can be connected to the low-pressure end and the high-pressure end in the refrigerant circulation loop at the same time, and thus when regulating the flow of the refrigerant circulating in the refrigerant circulation loop, it is more targeted, and the regulating efficiency of the regulating device on the flow of the refrigerant is improved, thereby further improving the heat exchange efficiency of the refrigerant circulation system.

[0018] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0020] Figure 1 is a structural schematic diagram of a refrigerant circulation system according to an exemplary embodiment;

[0021] Figure 2 is a schematic diagram of refrigerant circulation flow direction of a refrigerant circulation system during cooling according to an exemplary embodiment;

[0022] Figure 3 is a schematic diagram of refrigerant circulation flow direction of a refrigerant circulation system during cooling according to another exemplary embodiment;

[0023] Figure 4 is a schematic diagram of the refrigerant circulation flow direction of the refrigerant circulation system during heating according to an exemplary embodiment;

[0024] Figure 5 is a schematic diagram of refrigerant circulation flow direction of a refrigerant circulation system during heating according to another exemplary embodiment.

[0025] In the figure:

[0026] 1-refrigerant circulation system; 101-compressor; 102-first heat exchanger; 103-second heat exchanger; 11-bypass branch; 111-refrigerant storage unit; 112-first switch; 113-second switch; 12-four-way valve; 13-first pipeline; 14-second pipeline; 15-third pipeline; 16-fourth pipeline; 17-fifth pipeline; 18-throttling device; 19-fan. DETAILED DESCRIPTION

[0027] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0028] For example, electrical appliances such as refrigerators and air conditioners are equipped with a refrigerant circulation system, which realizes the heat exchange requirements of refrigeration or heating through the circulation of the refrigerant. At present, the amount of refrigerant injected into the refrigerant circulation system is a fixed value, and the amount of refrigerant required at different ambient temperatures is different. Exemplarily, the refrigerant circulation system includes a refrigerant circulation loop. When the ambient temperature of the electrical appliance is high, more refrigerant is required to participate in the circulation of the refrigerant, which leads to an increase in the pressure in the refrigerant circulation loop and reduces the heat exchange efficiency. When the ambient temperature of the electrical appliance is low, the amount of refrigerant participating in the refrigerant circulation is relatively small, which leads to a small pressure in the refrigerant circulation loop and also reduces the heat exchange efficiency of the refrigerant circulation system. Therefore, the amount of refrigerant participating in the circulation in the current refrigerant circulation system cannot adapt to the changes in ambient temperature, thereby reducing the heat exchange efficiency of the refrigerant circulation system.

[0029] Based on this, in the related art, a regulating device is provided on the refrigerant circulation system to control the flow rate of the refrigerant involved in the circulation. Exemplarily, the refrigerant circulation system includes a compressor, a condenser, an evaporator and a capillary tube, and the compressor, the condenser, the capillary tube and the evaporator are connected in sequence to form a refrigerant circulation loop. A regulating device is provided between the evaporator and the capillary tube, and the regulating device includes a liquid storage tank, a liquid return valve, a liquid outlet valve, a loop valve and a regulating branch connected in parallel with the liquid storage tank. The liquid storage tank is provided between the capillary tube and the evaporator, the liquid return valve is provided between the capillary tube and the liquid storage tank, the liquid outlet valve is provided between the liquid storage tank and the evaporator, and the loop valve is provided on the regulating branch. By controlling the on and off of the liquid return valve, the liquid outlet valve and the loop valve to adjust the flow rate of the refrigerant required to match, the dynamic regulation of the refrigerant in the entire refrigerant circulation loop is realized.

[0030] However, in the refrigerant circulation system of the above-mentioned related technology, due to the limitation of the setting position of the regulating device, the control effect of the refrigerant flow rate is not good. For example, when the refrigerant circulation system is cooling, the regulating device is located at the low-pressure end of the refrigerant circulation system. When the ambient temperature of the electrical equipment is high, the regulating device cannot adjust the refrigerant at the high-pressure end in time, thereby reducing the regulation efficiency of the refrigerant flow rate, resulting in limited improvement in the heat exchange efficiency of the refrigerant circulation system.

[0031] In order to solve the above technical problems, the present disclosure provides a refrigerant circulation system, which is provided with a refrigerant circulation loop and a bypass branch, wherein the first end of the bypass branch is connected between the compressor and the first heat exchanger, and the second end of the bypass branch is connected between the second heat exchanger and the compressor, and a regulating device is provided on the bypass branch to regulate the flow of the refrigerant circulating in the refrigerant circulation loop. With such a design, the regulating device can be connected to the low-pressure end and the high-pressure end in the refrigerant circulation loop at the same time, and then when regulating the flow of the refrigerant circulating in the refrigerant circulation loop, it is more targeted, and the regulating efficiency of the regulating device on the flow of the refrigerant is improved, thereby further improving the heat exchange efficiency of the refrigerant circulation system.

[0032] An exemplary embodiment of the present disclosure provides a refrigerant circulation system, Figure 1 The refrigerant circulation system 1 includes a compressor 101, a first heat exchanger 102, and a second heat exchanger 103. The compressor 101, the first heat exchanger 102, and the second heat exchanger 103 are connected to form a refrigerant circulation loop. Exemplarily, the first heat exchanger 102 can be an evaporator or a condenser. When the first heat exchanger 102 is an evaporator, the second heat exchanger 103 is a condenser; and when the first heat exchanger 102 is a condenser, the second heat exchanger 103 is an evaporator. The refrigerant circulates in the refrigerant circulation loop, so that the refrigerant circulation system 1 can achieve a heat exchange effect of cooling or heating.

[0033] The refrigerant circulation system 1 also includes a bypass branch 11, a first end of the bypass branch 11 is connected between the compressor 101 and the first heat exchanger 102, and a second end of the bypass branch 11 is connected between the second heat exchanger 103 and the compressor 101. A regulating device is provided on the bypass branch 11 to regulate the flow of the refrigerant circulating in the refrigerant circulation loop. Exemplarily, when the ambient temperature of the electrical equipment is high, the flow of the refrigerant circulating in the refrigerant circulation loop is reduced by regulating the regulating device to avoid excessive pressure of the refrigerant circulation loop under high temperature conditions, thereby improving the heat exchange efficiency of the refrigerant circulation system 1. When the ambient temperature of the electrical equipment is low, the flow of the refrigerant circulating in the refrigerant circulation loop is supplemented by regulating the regulating device to avoid excessive low pressure of the refrigerant circulation loop under low temperature conditions, thereby improving the heat exchange efficiency of the refrigerant circulation system 1.

[0034] Such a design enables the regulating device to be connected to the low-pressure end and the high-pressure end of the refrigerant circulation loop at the same time, so that it can be more targeted when regulating the flow of the refrigerant circulating in the refrigerant circulation loop, thereby improving the regulating efficiency of the regulating device on the flow of the refrigerant, thereby further improving the heat exchange efficiency of the refrigerant circulation system 1.

[0035] In one embodiment, in combination Figure 1 The regulating device includes a refrigerant storage part 111, a first switch 112 and a second switch 113. The first switch 112 is arranged between the refrigerant storage part 111 and the first end of the bypass branch 11, and the second switch 113 is arranged between the refrigerant storage part 111 and the second end of the bypass branch 11. With such a setting, the refrigerant circulating in the refrigerant circulation loop is controlled to flow into or out of the refrigerant storage part 111 by the first switch 112 and the second switch 113, thereby realizing dynamic regulation of the flow of the refrigerant, so that the flow of the refrigerant circulating in the refrigerant circulation loop is adapted to different ambient temperatures, thereby effectively improving the heat exchange efficiency of the refrigerant circulation system 1.

[0036] Combination Figure 1 In one embodiment, the refrigerant circulation system 1 is a refrigeration system, the first heat exchanger 102 is a condenser, and the second heat exchanger 103 is an evaporator. The compressor 101 compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure superheated steam, and enters the condenser after being discharged from the exhaust port of the compressor 101. The high-temperature and high-pressure superheated steam is cooled in the condenser and becomes a low-temperature and high-pressure liquid refrigerant. The liquid refrigerant can be throttled and depressurized by a throttling device 18 such as a capillary tube, and then enters the evaporator after becoming a low-temperature and low-pressure liquid refrigerant. The liquid refrigerant in the evaporator absorbs heat and vaporizes and then becomes a low-temperature and low-pressure gaseous refrigerant again, and re-enters the compressor 101. The refrigerant absorbs the surrounding heat during the vaporization process in the evaporator, thereby reducing the temperature around the evaporator and achieving the refrigeration effect. This cycle is repeated, so that the refrigerant circulation system 1 achieves refrigeration. For example, fans 19 may be provided at the first heat exchanger 102 and the second heat exchanger 103 , respectively, to drive the flow of air and increase the heat exchange rate of the environment where the first heat exchanger 102 and the second heat exchanger 103 are located.

[0037] The first switch 112 is a first pressure switch, and the first pressure switch is configured to open when the pressure on the refrigerant inflow side of the first pressure switch is equal to or higher than the first preset pressure. Exemplarily, the first preset pressure can be, for example, 0.6MPa. When the ambient temperature of the electrical equipment is high, for example, the ambient temperature is greater than or equal to 35°C, the flow rate of the refrigerant participating in the circulation increases, thereby increasing the pressure of the refrigerant circulation loop. When the pressure of the refrigerant circulation loop is equal to or higher than 0.6MPa, the circulating refrigerant will break the first pressure switch and enter the refrigerant storage unit 111, reducing the flow rate of the refrigerant on the refrigerant circulation loop to reduce the pressure of the refrigerant circulation loop and avoid excessive pressure of the refrigerant circulation loop under high temperature conditions, thereby effectively improving the refrigeration efficiency of the refrigerant circulation system 1.

[0038] The second switch 113 is a second pressure switch, and the second pressure switch is configured to open when the pressure on the refrigerant outflow side of the second pressure switch is equal to or lower than the second preset pressure. Exemplarily, the second preset pressure can be 0.06MPa, for example. When the ambient temperature of the electrical equipment is low, for example, the ambient temperature is less than or equal to 25°C, the flow rate of the refrigerant participating in the circulation is relatively small, so that the pressure of the refrigerant circulation loop drops. When the pressure of the refrigerant circulation loop is equal to or lower than 0.06MPa, the second pressure switch is turned on, and the refrigerant in the refrigerant storage unit 111 flows out to supplement the refrigerant circulation loop, increase the pressure of the refrigerant circulation loop, and avoid the pressure of the refrigerant circulation loop being too low in a low temperature state, thereby effectively improving the refrigeration efficiency of the refrigerant circulation system 1.

[0039] When the pressure on the refrigerant inflow side of the first pressure switch is lower than the first preset pressure, there is no need or no need to continue to adjust the flow rate of the refrigerant in the refrigerant circulation loop, and the first pressure switch is closed. Similarly, when the pressure on the refrigerant outflow side of the second pressure switch is higher than the second preset pressure, there is no need or no need to continue to adjust the flow rate of the refrigerant in the refrigerant circulation loop, and the second pressure switch is closed.

[0040] With such a design, on the one hand, the flow rate of the refrigerant can be dynamically adjusted according to the ambient temperature, so that the flow rate of the refrigerant circulating in the refrigerant circulation loop can adapt to different ambient temperatures, thereby effectively improving the refrigeration efficiency of the refrigerant circulation system 1. On the other hand, the refrigerant flowing out of the refrigerant storage unit 111 is a high-temperature and high-pressure gaseous refrigerant, and when it is supplemented to the suction side of the compressor 101, the compression efficiency of the compressor 101 for the gaseous refrigerant is improved, thereby not only further improving the refrigeration efficiency, but also saving energy.

[0041] Combination Figure 1In one embodiment, the refrigerant circulation system 1 is a heating system, the first heat exchanger 102 is an evaporator, and the second heat exchanger 103 is a condenser. The compressor 101 compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure superheated steam, and enters the evaporator after being discharged from the exhaust port of the compressor 101, and is liquefied in the evaporator. The refrigerant will emit heat during the liquefaction process, thereby increasing the temperature around the evaporator to achieve a heating effect. The liquefied refrigerant can be throttled and depressurized by a throttling device 18 such as a capillary tube, and then enters the condenser after becoming a low-temperature and low-pressure liquid refrigerant. The refrigerant in the condenser absorbs heat and vaporizes and becomes a low-temperature and low-pressure gaseous refrigerant again, and re-enters the compressor 101. This cycle is repeated, so that the refrigerant circulation system 1 can achieve heating.

[0042] The first switch 112 is a third pressure switch, and the third pressure switch is configured to open when the pressure on the refrigerant inflow side of the third pressure switch is equal to or higher than the third preset pressure. Exemplarily, the third preset pressure can be 0.6MPa, for example. When the ambient temperature of the electrical equipment is high, for example, the ambient temperature is greater than or equal to 35°C, the flow rate of the refrigerant participating in the circulation increases, thereby increasing the pressure of the refrigerant circulation loop. When the pressure of the refrigerant circulation loop is equal to or higher than 0.6MPa, the circulating refrigerant will break the third pressure switch and enter the refrigerant storage unit 111, reducing the flow rate of the refrigerant on the refrigerant circulation loop to reduce the pressure of the refrigerant circulation loop and avoid excessive pressure of the refrigerant circulation loop under high temperature conditions, thereby effectively improving the heating efficiency of the refrigerant circulation system 1.

[0043] The second switch 113 is a fourth pressure switch, and the fourth pressure switch is configured to open when the pressure on the refrigerant outflow side of the fourth pressure switch is equal to or lower than the fourth preset pressure. Exemplarily, the fourth preset pressure can be, for example, 0.06MPa. When the ambient temperature of the electrical equipment is low, for example, the ambient temperature is less than or equal to 25°C, the flow rate of the refrigerant participating in the circulation is relatively small, so that the pressure of the refrigerant circulation loop drops. When the pressure of the refrigerant circulation loop is equal to or lower than 0.06MPa, the fourth pressure switch is turned on, and the refrigerant in the refrigerant storage unit 111 flows out to supplement the refrigerant circulation loop, increase the pressure of the refrigerant circulation loop, and avoid the pressure of the refrigerant circulation loop being too low in a low temperature state, thereby effectively improving the heating efficiency of the refrigerant circulation system 1.

[0044] When the pressure on the refrigerant inflow side of the third pressure switch is lower than the third preset pressure, there is no need or no need to continue to adjust the flow rate of the refrigerant in the refrigerant circulation loop, and the third pressure switch is closed. Similarly, when the pressure on the refrigerant outflow side of the fourth pressure switch is higher than the fourth preset pressure, there is no need or no need to continue to adjust the flow rate of the refrigerant in the refrigerant circulation loop, and the fourth pressure switch is closed.

[0045] With such a design, on the one hand, the flow rate of the refrigerant can be dynamically adjusted according to the ambient temperature, so that the flow rate of the refrigerant circulating in the refrigerant circulation loop can adapt to different ambient temperatures, thereby effectively improving the heating efficiency of the refrigerant circulation system 1. On the other hand, the refrigerant flowing out of the refrigerant storage unit 111 is a high-temperature and high-pressure gaseous refrigerant, and when it is supplemented to the suction side of the compressor 101, the compression efficiency of the compressor 101 for the gaseous refrigerant is improved, thereby not only further improving the heating efficiency, but also saving energy.

[0046] In one embodiment, the first switch 112 and the second switch 113 may also be two-way valves. When the first switch 112 and the second switch 113 are both two-way valves, the refrigerant circulation system 1 further includes a temperature sensor and a controller. The temperature sensor is used to detect the ambient temperature, and the controller is electrically connected to the temperature sensor, the first switch 112, and the second switch 113 so as to control the opening of the first switch 112 and the second switch 113 according to the ambient temperature.

[0047] Exemplarily, when the temperature sensor detects that the ambient temperature is greater than or equal to the first preset temperature value, the first preset temperature value may be, for example, 35°C. At this time, the flow rate of the refrigerant participating in the circulation increases, thereby increasing the pressure of the refrigerant circulation loop. The controller controls the first switch 112 to open so that the circulating refrigerant enters the refrigerant storage unit 111, reducing the flow rate of the refrigerant on the refrigerant circulation loop to reduce the pressure of the refrigerant circulation loop, and avoiding excessive pressure of the refrigerant circulation loop under high temperature conditions, thereby effectively improving the heat exchange efficiency of the refrigerant circulation system 1.

[0048] When the temperature sensor detects that the ambient temperature is less than or equal to the second preset temperature value, the second preset temperature value may be, for example, 25°C. At this time, the flow rate of the refrigerant participating in the circulation is relatively small, so that the pressure of the refrigerant circulation loop decreases. The controller controls the second switch 113 to open, and the refrigerant in the refrigerant storage unit 111 flows out to supplement the refrigerant circulation loop, increase the pressure of the refrigerant circulation loop, and avoid the pressure of the refrigerant circulation loop being too low in a low temperature state, thereby effectively improving the heat exchange efficiency of the refrigerant circulation system 1.

[0049] When the ambient temperature detected by the temperature sensor is greater than the second preset temperature value and less than the first preset temperature value, it indicates that the pressure in the refrigerant circulation system is in a relatively suitable state and does not need to be adjusted, and the controller controls the first switch 112 and the second switch 113 to be closed.

[0050] By adopting such a setting form, the flow rate of the refrigerant can also be dynamically adjusted, so that the flow rate of the refrigerant circulating in the refrigerant circulation loop can adapt to different ambient temperatures, thereby effectively improving the heat exchange efficiency of the refrigerant circulation system 1. At the same time, the refrigerant flowing out of the refrigerant storage unit 111 is a high-temperature and high-pressure gaseous refrigerant, and when it is supplemented to the suction side of the compressor 101, the compression efficiency of the compressor 101 for the gaseous refrigerant is improved, thereby not only further improving the heating efficiency, but also saving energy.

[0051] Combination Figure 2 and Figure 4 In one embodiment, the refrigerant circulation system 1 further includes a four-way valve 12, a first end of the four-way valve 12 is connected to the exhaust port of the compressor 101 through a first pipeline 13, a second end of the four-way valve 12 is connected to the suction port of the compressor 101 through a second pipeline 14, a third end of the four-way valve 12 is connected to one end of the first heat exchanger 102 through a third pipeline 15, a fourth end of the four-way valve 12 is connected to one end of the second heat exchanger 103 through a fourth pipeline 16, and the other end of the first heat exchanger 102 is connected to the other end of the second heat exchanger 103 through a fifth pipeline 17. Exemplarily, a throttling device 18 such as a capillary tube may be provided on the fifth pipeline 17 to throttle and reduce the pressure of the refrigerant.

[0052] The first end of the bypass branch 11 is connected to the first pipeline 13 or the third pipeline 15, and the second end of the bypass branch 11 is connected to the second pipeline 14 or the fourth pipeline 16. Figure 2 , the first end of the bypass branch 11 can be connected to the first pipeline 13, and the second end of the bypass branch 11 can be connected to the second pipeline 14; combined Figure 3 Alternatively, the first end of the bypass branch 11 may be connected to the third pipeline 15 , and the second end of the bypass branch 11 may be connected to the fourth pipeline 16 .

[0053] By setting the four-way valve 12, the refrigerant circulation can be switched, so that the refrigerant circulation system 1 can achieve both heating and cooling. Figure 2 and Figure 3When the refrigerant circulation system 1 is cooling, the condenser serves as the first heat exchanger 102 and the evaporator serves as the second heat exchanger 103. The compressor 101 compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure superheated steam, and discharges it from the exhaust port of the compressor 101, and flows through the first pipeline 13 and the third pipeline 15 in sequence before entering the condenser. The high-temperature and high-pressure superheated steam is cooled in the condenser and becomes a low-temperature and high-pressure liquid refrigerant. The liquid refrigerant is throttled and depressurized by the throttling device 18 on the fifth pipeline 17, and then enters the evaporator after becoming a low-temperature and low-pressure liquid refrigerant. The liquid refrigerant in the evaporator absorbs heat and vaporizes, and then becomes a low-temperature and low-pressure gaseous refrigerant again, and flows through the fourth pipeline 16 and the second pipeline 14 in sequence before reentering the compressor 101. The refrigerant absorbs the surrounding heat during the vaporization process in the evaporator, thereby reducing the temperature around the evaporator and achieving the cooling effect.

[0054] Combination Figure 4 and Figure 5 When the refrigerant circulation system 1 is heating, the evaporator serves as the first heat exchanger 102 and the condenser serves as the second heat exchanger 103. The compressor 101 compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure superheated steam, and discharges it from the exhaust port of the compressor 101, flows through the first pipeline 13 and the third pipeline 15 in sequence, and then enters the evaporator, and is liquefied in the evaporator. The refrigerant will emit heat during the liquefaction process, thereby increasing the temperature around the evaporator to achieve the heating effect. The liquefied refrigerant is throttled and depressurized by the throttling device 18 on the fifth pipeline 17, and then enters the condenser after becoming a low-temperature and low-pressure liquid refrigerant. The refrigerant in the condenser absorbs heat and vaporizes, and then becomes a low-temperature and low-pressure gaseous refrigerant again, and then flows through the fourth pipeline 16 and the second pipeline 14 in sequence and then re-enters the compressor 101. This cycle is repeated, so that the refrigerant circulation system 1 can achieve heating.

[0055] Combination Figures 2 to 4 In one embodiment, the first end of the bypass branch 11 is connected to the first pipeline 13, and the first switch 112 is a fifth pressure switch. The fifth pressure switch is configured to open when the pressure on the refrigerant inflow side of the fifth pressure switch is equal to or higher than the fifth preset pressure. Exemplarily, the fifth preset pressure can be 0.6MPa, for example. When the ambient temperature of the electrical equipment is high, for example, the ambient temperature is greater than or equal to 35°C, the flow rate of the refrigerant participating in the circulation increases, thereby increasing the pressure of the refrigerant circulation loop. When the pressure of the refrigerant circulation loop is equal to or higher than 0.6MPa, the circulating refrigerant will break the fifth pressure switch and enter the refrigerant storage part 111, reducing the flow rate of the refrigerant on the refrigerant circulation loop to reduce the pressure of the refrigerant circulation loop and avoid excessive pressure of the refrigerant circulation loop under high temperature conditions, thereby effectively improving the heat exchange efficiency of the refrigerant circulation system 1.

[0056] The second end of the bypass branch 11 is connected to the second pipeline 14, and the second switch 113 is a sixth pressure switch. The sixth pressure switch is configured to open when the pressure on the refrigerant outflow side of the sixth pressure switch is equal to or lower than the sixth preset pressure. Exemplarily, the sixth preset pressure can be 0.06MPa, for example. When the ambient temperature of the electrical equipment is low, for example, the ambient temperature is less than or equal to 25°C, the flow rate of the refrigerant participating in the circulation is relatively small, so that the pressure of the refrigerant circulation loop drops. When the pressure of the refrigerant circulation loop is equal to or lower than 0.06MPa, the sixth pressure switch is turned on, and the refrigerant in the refrigerant storage unit 111 flows out to supplement the refrigerant circulation loop, increase the pressure of the refrigerant circulation loop, and avoid the pressure of the refrigerant circulation loop being too low in a low temperature state, thereby effectively improving the refrigeration efficiency of the refrigerant circulation system 1.

[0057] When the pressure on the refrigerant inflow side of the fifth pressure switch is lower than the fifth preset pressure, there is no need or no need to continue to adjust the flow rate of the refrigerant in the refrigerant circulation loop, and the fifth pressure switch is closed. Similarly, when the pressure on the refrigerant outflow side of the sixth pressure switch is higher than the sixth preset pressure, there is no need or no need to continue to adjust the flow rate of the refrigerant in the refrigerant circulation loop, and the sixth pressure switch is closed.

[0058] With such a design, on the one hand, the flow rate of the refrigerant can be dynamically adjusted according to the ambient temperature, so that the flow rate of the refrigerant circulating in the refrigerant circulation loop can adapt to different ambient temperatures, thereby effectively improving the heat exchange efficiency of the refrigerant circulation system 1. On the other hand, the refrigerant flowing out of the refrigerant storage unit 111 is a high-temperature and high-pressure gaseous refrigerant, and when it is supplemented to the suction side of the compressor 101, the compression efficiency of the compressor 101 for the gaseous refrigerant is improved, thereby not only further improving the heat exchange efficiency, but also saving energy.

[0059] In one embodiment, in combination Figure 3 and Figure 5 , the first end of the bypass branch 11 is connected to the third pipeline 15, the first switch 112 is the seventh pressure switch, and the seventh pressure switch is configured to open when the pressure on the refrigerant inflow side of the seventh pressure switch is equal to or higher than the seventh preset pressure. Exemplarily, the seventh preset pressure can be 0.6MPa, for example. When the ambient temperature of the electrical equipment is high, for example, the ambient temperature is greater than or equal to 35°C, the flow rate of the refrigerant participating in the circulation increases, thereby increasing the pressure of the refrigerant circulation loop. When the pressure of the refrigerant circulation loop is equal to or higher than 0.6MPa, the circulating refrigerant will break the seventh pressure switch and enter the refrigerant storage part 111, reducing the flow rate of the refrigerant on the refrigerant circulation loop, so as to reduce the pressure of the refrigerant circulation loop and avoid excessive pressure of the refrigerant circulation loop under high temperature conditions, thereby effectively improving the heat exchange efficiency of the refrigerant circulation system 1.

[0060] The second end of the bypass branch 11 is connected to the fourth pipeline 16, and the second switch 113 is an eighth pressure switch. The eighth pressure switch is configured to open when the pressure on the refrigerant outflow side of the eighth pressure switch is equal to or lower than the eighth preset pressure. Exemplarily, the eighth preset pressure can be 0.06MPa, for example. When the ambient temperature of the electrical equipment is low, for example, the ambient temperature is less than or equal to 25°C, the flow rate of the refrigerant participating in the circulation is relatively small, so that the pressure of the refrigerant circulation loop drops. When the pressure of the refrigerant circulation loop is equal to or lower than 0.06MPa, the eighth pressure switch is opened, and the refrigerant in the refrigerant storage unit 111 flows out to supplement the refrigerant circulation loop, increase the pressure of the refrigerant circulation loop, and avoid the pressure of the refrigerant circulation loop being too low in a low temperature state, thereby effectively improving the refrigeration efficiency of the refrigerant circulation system 1.

[0061] When the pressure on the refrigerant inflow side of the seventh pressure switch is lower than the seventh preset pressure, there is no need or no need to continue to adjust the flow rate of the refrigerant in the refrigerant circulation loop, and the seventh pressure switch is closed. Similarly, when the pressure on the refrigerant outflow side of the eighth pressure switch is higher than the eighth preset pressure, there is no need or no need to continue to adjust the flow rate of the refrigerant in the refrigerant circulation loop, and the eighth pressure switch is closed.

[0062] With such a design, on the one hand, the flow rate of the refrigerant can be dynamically adjusted according to the ambient temperature, so that the flow rate of the refrigerant circulating in the refrigerant circulation loop can adapt to different ambient temperatures, thereby effectively improving the heat exchange efficiency of the refrigerant circulation system 1. On the other hand, the refrigerant flowing out of the refrigerant storage unit 111 is a high-temperature and high-pressure gaseous refrigerant, and when it is supplemented to the suction side of the compressor 101, the compression efficiency of the compressor 101 for the gaseous refrigerant is improved, thereby not only further improving the heat exchange efficiency, but also saving energy.

[0063] In one embodiment, the regulating device includes a refrigerant storage portion 111, a first refrigerant driving device, and a second refrigerant driving device, wherein the first refrigerant driving device is disposed between the refrigerant storage portion 111 and the first end of the bypass branch 11, and the second refrigerant driving device is disposed between the refrigerant storage portion 111 and the second end of the bypass branch 11. Exemplarily, the first refrigerant driving device may be, for example, an air pump to pump the refrigerant on the refrigerant circulation loop into the refrigerant storage portion 111. Similarly, the second refrigerant driving device may also be, for example, an air pump to pump the refrigerant in the refrigerant storage portion 111 to the refrigerant circulation loop.

[0064] By adopting such a setting, it is also possible to realize dynamic regulation of the flow rate of the refrigerant, so that the flow rate of the refrigerant circulating in the refrigerant circulation loop can adapt to different ambient temperatures, thereby effectively improving the heat exchange efficiency of the refrigerant circulation system 1.

[0065] In one embodiment, when the regulating device includes a refrigerant storage unit 111, a first refrigerant driving device and a second refrigerant driving device, the refrigerant circulation system 1 further includes a temperature sensor and a controller. The temperature sensor is used to detect the ambient temperature, and the controller is electrically connected to the temperature sensor, the first refrigerant driving device, and the second refrigerant driving device so as to control the opening of the first refrigerant driving device and the second refrigerant driving device according to the ambient temperature.

[0066] Exemplarily, when the temperature sensor detects that the ambient temperature is greater than or equal to the first preset temperature value, the first preset temperature value may be, for example, 35°C. At this time, the flow rate of the refrigerant participating in the circulation increases, thereby increasing the pressure of the refrigerant circulation loop. The controller controls the first refrigerant driving device to start, so as to pump the circulating refrigerant into the refrigerant storage unit 111, thereby reducing the flow rate of the refrigerant on the refrigerant circulation loop, so as to reduce the pressure of the refrigerant circulation loop, and avoid excessive pressure of the refrigerant circulation loop under high temperature conditions, thereby effectively improving the heat exchange efficiency of the refrigerant circulation system 1.

[0067] When the temperature sensor detects that the ambient temperature is less than or equal to the second preset temperature value, the second preset temperature value may be, for example, 25°C. At this time, the flow rate of the refrigerant participating in the circulation is relatively small, so that the pressure of the refrigerant circulation loop decreases. The controller controls the second refrigerant driving device to start, and pumps the refrigerant in the refrigerant storage unit 111 to the refrigerant circulation loop to replenish the refrigerant on the refrigerant circulation loop, increase the pressure of the refrigerant circulation loop, and avoid the pressure of the refrigerant circulation loop being too low in a low temperature state, thereby effectively improving the heat exchange efficiency of the refrigerant circulation system 1.

[0068] When the ambient temperature detected by the temperature sensor is greater than the second preset temperature value and less than the first preset temperature value, it indicates that the pressure in the refrigerant circulation system is in a relatively suitable state and does not need to be adjusted, and the controller controls the first refrigerant drive device and the second refrigerant drive device to shut down.

[0069] By adopting such a configuration, dynamic regulation of the flow rate of the refrigerant is achieved, thereby effectively improving the heat exchange efficiency of the refrigerant circulation system 1 .

[0070] An exemplary embodiment of the present disclosure provides an electrical device, which may be, for example, a refrigerator, an air conditioner, or a heat pump water heater, etc., an electrical device having a refrigerant circulation system 1. The electrical device includes the refrigerant circulation system 1 as described above. Figure 1The refrigerant circulation system 1 includes a compressor 101, a first heat exchanger 102 and a second heat exchanger 103, and the compressor 101, the first heat exchanger 102 and the second heat exchanger 103 are connected to form a refrigerant circulation loop. The refrigerant circulation system 1 also includes a bypass branch 11, a first end of the bypass branch 11 is connected between the compressor 101 and the first heat exchanger 102, and a second end of the bypass branch 11 is connected between the second heat exchanger 103 and the compressor 101. A regulating device is provided on the bypass branch 11 to regulate the flow of the refrigerant circulating in the refrigerant circulation loop. Exemplarily, when the ambient temperature of the electrical equipment is high, the flow of the refrigerant circulating in the refrigerant circulation loop is reduced by regulating the regulating device to avoid excessive pressure of the refrigerant circulation loop under high temperature, thereby improving the heat exchange efficiency of the refrigerant circulation system 1. When the ambient temperature of the electrical equipment is low, the flow of refrigerant circulating in the refrigerant circulation loop is supplemented through the adjustment of the regulating device to avoid the pressure of the refrigerant circulation loop being too low under low temperature conditions, thereby improving the heat exchange efficiency of the refrigerant circulation system 1.

[0071] Such a design enables the regulating device to be connected to the low-pressure end and the high-pressure end of the refrigerant circulation loop at the same time, so that it can be more targeted when regulating the flow of the refrigerant circulating in the refrigerant circulation loop, thereby improving the regulating efficiency of the regulating device on the flow of the refrigerant, thereby further improving the heat exchange efficiency of the refrigerant circulation system 1.

[0072] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0073] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A refrigerant circulation system, characterized in that: The refrigerant circulation system comprises a compressor, a first heat exchanger and a second heat exchanger, wherein the compressor, the first heat exchanger and the second heat exchanger are connected to form a refrigerant circulation loop; The refrigerant circulation system also includes a bypass branch, a first end of the bypass branch is connected between the compressor and the first heat exchanger, a second end of the bypass branch is connected between the second heat exchanger and the compressor, and a regulating device is provided on the bypass branch, and the regulating device is used to regulate the flow rate of the refrigerant circulating in the refrigerant circulation loop.

2. The refrigerant circulation system according to claim 1, characterized in that: The regulating device includes a refrigerant storage part, a first switch and a second switch. The first switch is arranged between the refrigerant storage part and a first end of the bypass branch, and the second switch is arranged between the refrigerant storage part and a second end of the bypass branch.

3. The refrigerant circulation system according to claim 2, characterized in that: The refrigerant circulation system is a refrigeration system, the first heat exchanger is a condenser, the second heat exchanger is an evaporator, the first switch is a first pressure switch, and the first pressure switch is configured to open when the pressure on the refrigerant inlet side of the first pressure switch is equal to or higher than a first preset pressure, and the second switch is a second pressure switch, and the second pressure switch is configured to open when the pressure on the refrigerant outflow side of the second pressure switch is equal to or lower than a second preset pressure.

4. The refrigerant circulation system according to claim 2, characterized in that: The refrigerant circulation system is a heating system, the first heat exchanger is an evaporator, the second heat exchanger is a condenser, the first switch is a third pressure switch, and the third pressure switch is configured to open when the pressure on the refrigerant inlet side of the third pressure switch is equal to or higher than a third preset pressure, and the second switch is a fourth pressure switch, and the fourth pressure switch is configured to open when the pressure on the refrigerant outlet side of the fourth pressure switch is equal to or lower than a fourth preset pressure.

5. The refrigerant circulation system according to claim 2, characterized in that: The refrigerant circulation system further comprises: A temperature sensor, wherein the temperature sensor is used to detect the ambient temperature; A controller is electrically connected to the temperature sensor, the first switch, and the second switch.

6. The refrigerant circulation system according to claim 2, characterized in that: The refrigerant circulation system further includes a four-way valve, a first end of the four-way valve is connected to the exhaust port of the compressor through a first pipeline, a second end of the four-way valve is connected to the suction port of the compressor through a second pipeline, a third end of the four-way valve is connected to one end of the first heat exchanger through a third pipeline, a fourth end of the four-way valve is connected to one end of the second heat exchanger through a fourth pipeline, and the other end of the first heat exchanger is connected to the other end of the second heat exchanger through a fifth pipeline; The first end of the bypass branch is connected to the first pipeline or the third pipeline, and the second end of the bypass branch is connected to the second pipeline or the fourth pipeline.

7. The refrigerant circulation system according to claim 6, characterized in that: The first end of the bypass branch is connected to the first pipeline, the first switch is a fifth pressure switch, and the fifth pressure switch is configured to open when the pressure on the refrigerant inflow side of the fifth pressure switch is equal to or higher than a fifth preset pressure; The second end of the bypass branch is connected to the second pipeline, and the second switch is a sixth pressure switch. The sixth pressure switch is configured to open when the pressure on the refrigerant outflow side of the sixth pressure switch is equal to or lower than a sixth preset pressure.

8. The refrigerant circulation system according to claim 1, characterized in that: The regulating device includes a refrigerant storage part, a first refrigerant driving device and a second refrigerant driving device, wherein the first refrigerant driving device is arranged between the refrigerant storage part and the first end of the bypass branch, and the second refrigerant driving device is arranged between the refrigerant storage part and the second end of the bypass branch.

9. The refrigerant circulation system according to claim 8, characterized in that: The refrigerant circulation system further comprises: A temperature sensor, wherein the temperature sensor is used to detect the ambient temperature; The controller is electrically connected to the temperature sensor, the first refrigerant driving device, and the second refrigerant driving device.

10. An electrical device, characterized in that: The electrical equipment includes a refrigerant circulation system as described in any one of claims 1 to 9.

11. The electrical device according to claim 10, characterized in that: The electrical equipment includes a refrigerator, an air conditioner or a heat pump water heater.

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