Refrigerating system

Abstract

The utility model provides a refrigerating system which comprises a compressor and a condenser, the output end of the compressor communicates with a refrigerant inlet of the condenser through a first refrigerant channel, a first sensor set is arranged on the first refrigerant channel, and the input end of the compressor communicates with a refrigerant outlet of the condenser through a second refrigerant channel; a second sensor group, an electromagnetic valve and a needle valve are arranged on the second refrigerant passage; and the control module is electrically connected with the first sensor group, the second sensor group and the electromagnetic valve, and the control module is configured to be used for obtaining the exhaust superheat degree according to the first sensor group, obtaining the suction superheat degree according to the second sensor group and controlling the electromagnetic valve to be closed according to the exhaust superheat degree and the suction superheat degree. According to the refrigerating system, the interior of the system is conveniently vacuumized before transportation, safety accidents caused by leakage of refrigerants are avoided, and filling of the refrigerants can be controlled to be stopped according to the exhaust superheat degree and the suction superheat degree in the refrigerant filling process.

Description

Technical Field

[0001] This disclosure generally relates to the field of industrial refrigeration equipment technology, and specifically to a refrigeration system. Background Technology

[0002] In the widespread application of refrigeration technology, refrigeration units or systems typically include core components such as compressors and condensers, and achieve cooling effects through the circulation of refrigerant within the system. Refrigerant management is a crucial aspect of the manufacturing, transportation, and installation of refrigeration units.

[0003] Especially during the transportation of refrigeration units, the complex and variable transportation environment can cause copper pipes or other refrigerant pipelines in the refrigeration system to break due to external forces such as compression, impact, or vibration. Once a copper pipe breaks, the refrigerant in the system may leak out. In a closed transportation or storage environment, this leaked refrigerant may mix with air to form a flammable or explosive mixture. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a refrigeration system to solve the above problems.

[0005] This application provides a refrigeration system, including:

[0006] Compressor and condenser;

[0007] A first refrigerant passage is provided, wherein the output end of the compressor is connected to the refrigerant inlet of the condenser through the first refrigerant passage, and a first sensor group is provided on the first refrigerant passage;

[0008] The second refrigerant passage connects the input end of the compressor to the refrigerant outlet of the condenser. The second refrigerant passage is equipped with a second sensor group, a solenoid valve, and a needle valve.

[0009] A control module is electrically connected to the first sensor group, the second sensor group, and the solenoid valve. The control module is configured to obtain exhaust superheat from the first sensor group, obtain intake superheat from the second sensor group, and control the solenoid valve to close based on the exhaust superheat and intake superheat.

[0010] According to the technical solution provided in the embodiments of this application, the first sensor group includes an exhaust pressure sensor and an exhaust temperature sensor, wherein the exhaust superheat is the difference between the exhaust temperature and the saturation temperature corresponding to the exhaust pressure.

[0011] The second sensor group includes an inhalation pressure sensor and an inhalation temperature sensor, wherein the inhalation superheat is the difference between the inhalation temperature and the saturation temperature corresponding to the inhalation pressure.

[0012] According to the technical solution provided in the embodiments of this application, the refrigeration system further includes a dryer filter, which is disposed on the second refrigerant passage.

[0013] According to the technical solution provided in the embodiments of this application, the refrigeration system further includes a low-temperature evaporator, which is disposed on the second refrigerant passage.

[0014] According to the technical solution provided in the embodiments of this application, the second refrigerant passage includes:

[0015] A high-pressure liquid passage, one end of which is connected to the refrigerant outlet of the condenser, and the other end of which is connected to the inlet of the dryer filter;

[0016] A low-pressure liquid passage, one end of which is connected to the outlet of the dryer filter, and the other end of which is connected to the inlet of the low-temperature evaporator;

[0017] A low-temperature, low-pressure passage, one end of which is connected to the outlet of the low-temperature evaporator, and the other end of which is connected to the input of the compressor.

[0018] According to the technical solution provided in the embodiments of this application, the refrigeration system further includes a throttling element, which is disposed on the low-pressure liquid passage.

[0019] According to the technical solution provided in the embodiments of this application, the inhalation pressure sensor and the inhalation temperature sensor are disposed on the low temperature and low pressure path.

[0020] According to the technical solution provided in the embodiments of this application, the throttling element is a capillary tube.

[0021] Compared with the prior art, the beneficial effects of this application are as follows: The refrigeration system provided by this application, by setting a solenoid valve and a needle valve on the second refrigerant passage, allows the needle valve to be connected to a vacuum pump to evacuate the inside of the refrigeration system, thereby discharging the refrigerant in the passage, and the solenoid valve to be connected to an external bottled refrigerant to charge the passage with refrigerant; through the controller and a first sensor group and a second sensor group electrically connected to the controller, during the process of charging the passage with refrigerant, the controller can obtain the exhaust superheat and intake superheat based on the measurement values ​​of the first sensor group and the second sensor group, and then control the solenoid valve to close when the exhaust superheat and intake superheat meet the requirements, thereby realizing automatic monitoring of the refrigerant charging process; since the refrigeration system provided by this application facilitates the discharge and charging of refrigerant, the refrigerant can be discharged during the transportation of the refrigeration system, avoiding the risk of explosion caused by refrigerant leakage during the transportation of the refrigeration system with refrigerant. Attached Figure Description

[0022] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0023] Figure 1 A schematic diagram of the refrigeration system provided in this application.

[0024] Reference numerals: 100, Compressor; 200, Condenser; 310, First refrigerant passage; 320, Second refrigerant passage; 321, High-pressure liquid passage; 322, Low-pressure liquid passage; 323, Low-temperature and low-pressure passage; 410, First sensor; 411, Discharge pressure sensor; 412, Discharge temperature sensor; 420, Second sensor group; 421, Suction pressure sensor; 422, Suction temperature sensor; 500, Solenoid valve; 600, Needle valve; 700, Dryer filter; 800, Low-temperature evaporator; 900, Throttling element. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Please refer to Figure 1 This application provides a refrigeration system, comprising:

[0028] Compressor 100 and condenser 200;

[0029] The first refrigerant passage 310 is provided with a first sensor group 410. The output end of the compressor 100 is connected to the refrigerant inlet of the condenser 200 through the first refrigerant passage 310.

[0030] The second refrigerant passage 320 connects the input end of the compressor 100 to the refrigerant outlet of the condenser 200. The second refrigerant passage 320 is equipped with a second sensor group 420, a solenoid valve 500 and a needle valve 600.

[0031] A control module is electrically connected to the first sensor group 410, the second sensor group 420, and the solenoid valve 500. The control module is configured to obtain the exhaust superheat from the first sensor group 410, obtain the intake superheat from the second sensor group 420, and control the solenoid valve 500 to close based on the exhaust superheat and intake superheat.

[0032] Specifically, compressor 100 is used to compress the refrigerant, condenser 200 is used for heat exchange through the refrigerant, the output end of compressor 100 is connected to the refrigerant inlet of condenser 200 through first refrigerant passage 310, and the input end of compressor 100 is connected to the refrigerant outlet of condenser 200 through second refrigerant passage 320, thereby realizing refrigerant circulation. The refrigerant flowing in the first refrigerant passage 310 is at a relatively high temperature and high pressure after being pressurized by compressor 100, while the refrigerant flowing in the second refrigerant passage 320 is at a relatively low temperature and low pressure.

[0033] The second refrigerant passage 320 is equipped with a solenoid valve 500 and a needle valve 600. The solenoid valve 500 is used to connect to an external bottled refrigerant. By opening the valve of the solenoid valve 500, refrigerant can be charged into the refrigeration system. The needle valve 600 is used to connect to an external vacuum pump. The vacuum pump is used to evacuate the refrigeration system to facilitate the discharge of refrigerant during the transportation of the refrigeration system.

[0034] Specifically, a first sensor group 410 is provided on the first refrigerant passage 310. The first sensor group 410 includes an exhaust pressure sensor 411 and an exhaust temperature sensor 412. The exhaust pressure sensor 411 measures the exhaust pressure of the high-pressure refrigerant in the first refrigerant passage 310, and the exhaust temperature sensor 412 measures the exhaust temperature of the high-temperature refrigerant in the first refrigerant passage 310. The exhaust superheat can be calculated based on the measurements of the exhaust pressure sensor 411 and the exhaust temperature sensor 412. The exhaust superheat is the difference between the exhaust temperature and the saturation temperature corresponding to the exhaust pressure. The saturation temperature corresponding to the exhaust pressure is preset according to the type of refrigerant, the heat dissipation effect of the condenser 200, and the speed and power of the compressor 100.

[0035] A second sensor group 420 is provided on the second refrigerant passage 320. The second sensor group 420 includes a suction pressure sensor 421 and a suction temperature sensor 422. The suction pressure sensor 421 measures the discharge pressure of the low-pressure refrigerant in the second refrigerant passage 320, and the suction temperature sensor 422 measures the suction temperature of the low-temperature refrigerant in the second refrigerant passage 320. The suction superheat can be calculated based on the measurements of the suction pressure sensor 421 and the suction temperature sensor 422. The suction superheat is the difference between the discharge temperature and the saturation temperature corresponding to the suction pressure. The saturation temperature corresponding to the suction pressure is preset according to the type of refrigerant, the heat dissipation effect of the condenser 200, and the speed and power of the compressor 100.

[0036] Specifically, the control module is electrically connected to the exhaust pressure sensor 411, exhaust temperature sensor 412, suction pressure sensor 421, suction temperature sensor 422, and solenoid valve 500. The control module stores preset ranges for exhaust superheat and suction superheat. The control module obtains the exhaust superheat and suction superheat based on the measured values ​​from the exhaust pressure sensor 411, exhaust temperature sensor 412, suction pressure sensor 421, and suction temperature sensor 422. When both the exhaust superheat and suction superheat meet their preset ranges, the control module sends a valve closing signal to the solenoid valve 500 to close the valve and stop refrigerant charging. The selectable preset ranges for exhaust superheat are [15℃~20℃] and suction superheat are [3℃~10℃]. It should be noted that the methods for obtaining exhaust superheat and intake superheat, as well as the methods for setting the preset ranges of exhaust superheat and intake superheat, are existing technologies and will not be described in detail here.

[0037] The refrigeration system provided by this application allows for easy extraction of refrigerant, and the refrigerant charging process can be interrupted by controlling the solenoid valve 500 through the control module, eliminating the need for manual valve closure to cut off the refrigerant supply. The refrigerant charging process can be monitored in real time. Because the refrigeration system provided by this application facilitates the discharge and charging of refrigerant, the refrigerant can be completely discharged during transportation and then recharged upon arrival at the destination, avoiding the risk of refrigerant leakage and explosion during transportation.

[0038] Furthermore, the refrigeration system also includes a dryer filter 700, which is disposed on the second refrigerant passage 320.

[0039] Specifically, the dryer filter 700 is connected in series in the second refrigerant passage 320. The dryer filter 700 is used to filter impurities in the refrigeration system, including oxide layers formed in the passage due to welding and other operations during the refrigeration system production process, as well as water vapor and other impurities in the refrigerant.

[0040] Furthermore, the refrigeration system also includes a low-temperature evaporator 800, which is disposed on the second refrigerant passage 320.

[0041] Specifically, the low-temperature evaporator 800 is connected in series with the second refrigerant passage 320. The low-temperature evaporator 800 is located between the dryer filter 700 and the compressor 100. The low-temperature evaporator 800 is used to evaporate the refrigerant into a low-pressure vapor after absorbing heat.

[0042] Furthermore, a high-pressure liquid passage 321 is provided, one end of which is connected to the refrigerant outlet of the condenser 200, and the other end of which is connected to the inlet of the dryer filter 700.

[0043] Low-pressure liquid passage 322, one end of which is connected to the outlet of the dryer filter 700, and the other end of which is connected to the inlet of the low-temperature evaporator 800;

[0044] The low-temperature and low-pressure passage 323 is connected at one end to the outlet of the low-temperature evaporator 800 and at the other end to the input of the compressor 100.

[0045] Specifically, the second refrigerant passage 320 includes three sections: a high-pressure liquid passage 321, a low-pressure liquid passage 322, and a low-temperature, low-pressure passage 323. The high-pressure liquid passage 321 connects the refrigerant outlet of the condenser 200 and the input end of the dryer filter 700. The refrigerant in the high-pressure liquid passage 321 is a high-pressure, room-temperature liquid refrigerant after heat exchange in the condenser 200. The low-pressure liquid passage 322 connects the output end of the dryer filter 700 and the input end of the low-temperature evaporator 800. The high-pressure, room-temperature liquid refrigerant after drying and filtration by the dryer filter 700 becomes a low-pressure, room-temperature liquid refrigerant in the low-pressure liquid passage 322. The low-temperature, low-pressure passage 323 connects the output end of the low-temperature evaporator 800 and the input end of the compressor 100. The refrigerant in the low-temperature, low-pressure passage 323 is a low-temperature, low-pressure gaseous refrigerant after evaporation in the low-temperature evaporator 800.

[0046] Furthermore, the refrigeration system also includes a throttling element 900, which is disposed on the low-pressure liquid passage 322.

[0047] Specifically, the throttling element 900 is connected in series in the low-pressure liquid passage 322. The throttling element 900 is used to throttle the refrigerant and reduce the pressure of the high-pressure, room-temperature liquid refrigerant after drying and filtering by the dryer filter 700 to low-pressure, room-temperature liquid refrigerant. In this embodiment, the throttling element 900 is a capillary tube. In other embodiments, the throttling element 900 may also be an expansion valve or other structures.

[0048] Furthermore, the inhalation pressure sensor 421 and the inhalation temperature sensor 422 are disposed on the low temperature and low pressure passage 323.

[0049] Specifically, the intake pressure sensor 421 and intake temperature sensor 422 are located on the low temperature and low pressure passage 323 to obtain the intake superheat more accurately.

[0050] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A refrigeration system characterized by, The application relates to a refrigeration system comprising: a compressor (100) and a condenser (200); a first refrigerant passage (310) through which an output end of the compressor (100) is communicated with a refrigerant inlet of the condenser (200), wherein a first sensor group (410) is arranged on the first refrigerant passage (310); a second refrigerant passage (320) through which an input end of the compressor (100) is communicated with a refrigerant outlet of the condenser (200), wherein a second sensor group (420), an electromagnetic valve (500) and a needle valve (600) are arranged on the second refrigerant passage (320); a control module electrically connected with the first sensor group (410), the second sensor group (420) and the electromagnetic valve (500), wherein the control module is configured to acquire an exhaust gas superheat degree according to the first sensor group (410), acquire a suction gas superheat degree according to the second sensor group (420), and control the electromagnetic valve (500) to be closed according to the exhaust gas superheat degree and the suction gas superheat degree.

2. The refrigeration system of claim 1, wherein, The first sensor group (410) comprises an exhaust gas pressure sensor (411) and an exhaust gas temperature sensor (412), and the exhaust gas superheat degree is a difference between the exhaust gas temperature and a saturation temperature corresponding to the exhaust gas pressure. The second sensor group (420) comprises a suction gas pressure sensor (421) and a suction gas temperature sensor (422), and the suction gas superheat degree is a difference between the suction gas temperature and a saturation temperature corresponding to the suction gas pressure.

3. The refrigeration system of claim 2, wherein, The refrigeration system further comprises a drying filter (700) arranged on the second refrigerant passage (320).

4. The refrigeration system of claim 3, wherein, The refrigeration system further comprises a low-temperature evaporator (800) arranged on the second refrigerant passage (320).

5. The refrigeration system of claim 4, wherein, The second refrigerant passage (320) comprises: a high-pressure liquid passage (321) having one end communicated with the refrigerant outlet of the condenser (200) and the other end communicated with an inlet of the drying filter (700); a low-pressure liquid passage (322) having one end communicated with an outlet of the drying filter (700) and the other end communicated with an inlet of the low-temperature evaporator (800); a low-temperature and low-pressure passage (323) having one end communicated with an outlet of the low-temperature evaporator (800) and the other end communicated with the input end of the compressor (100).

6. The refrigeration system of claim 5, wherein, The refrigeration system further comprises a throttling element (900) arranged on the low-pressure liquid passage (322).

7. The refrigeration system of claim 6, wherein, The suction gas pressure sensor (421) and the suction gas temperature sensor (422) are arranged on the low-temperature and low-pressure passage (323).

8. The refrigeration system of claim 7, wherein, The throttling element (900) is a capillary tube.

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