Refrigerating system and refrigerating equipment
By introducing a cold storage box into the refrigeration system and having it in contact with the compressor, the cold storage medium absorbs heat from the compressor and heats the refrigerant during defrosting, thus solving the liquid slugging problem during defrosting in air-cooled refrigerators and extending the compressor's service life.
Patent Information
- Application Number
- CN202422707462.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-05
AI Technical Summary
During the defrosting process of a frost-free refrigerator, the refrigerant drawn into the compressor is at a low temperature, which can easily lead to liquid refrigerant, causing liquid slugging and affecting the compressor's lifespan.
Introducing a cold storage box into the refrigeration system, which is in direct contact with the compressor or connected through a heat transfer medium, allows the cold storage medium to absorb heat from the compressor and heat the refrigerant during defrosting, thus preventing the formation of liquid refrigerant.
By raising the refrigerant temperature, the formation of liquid refrigerant is avoided, the compressor's lifespan is extended, and defrosting efficiency is improved.
Smart Images
Figure CN223484552U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of refrigeration equipment, and in particular to a refrigeration system and refrigeration equipment. Background Technology
[0002] With the improvement of people's living standards, refrigerators have become an indispensable appliance in modern family life. Refrigerators are mainly divided into direct cooling refrigerators, air-cooled refrigerators, hybrid refrigerators, and inverter refrigerators. Among them, the principle of air-cooled refrigerators is to use air for cooling. When high-temperature air flows through the built-in evaporator, due to the high air temperature and the low evaporator temperature, the two directly exchange heat, and the air temperature will drop. Cold air is blown into the refrigerator, and the refrigerator temperature is lowered through this continuous circulation.
[0003] After a period of use, a frost layer will form on the evaporator surface of a refrigerator. When the accumulated frost layer becomes too thick, it will affect the heat transfer rate, so it needs to be removed. There are many defrosting methods for frost-free refrigerators, such as electric defrosting and hot gas defrosting. Compared with electric defrosting, hot gas defrosting can save electricity. However, because the temperature of the refrigerant drawn into the compressor is relatively low during the defrosting process, it is easy for liquid refrigerant to form, causing liquid slugging in the compressor and leading to compressor failure. Utility Model Content
[0004] Based on this, embodiments of this application provide a refrigeration system and refrigeration equipment.
[0005] In a first aspect, embodiments of this application provide a refrigeration system, including a compressor, a first switching unit, a condenser, a first throttling device, an evaporator, a second switching unit, and a cold storage box;
[0006] The first switching unit has a first inlet, a first outlet, and a second outlet. The first inlet is connected to the output end of the compressor, the first outlet is connected to the input end of the evaporator, and the second outlet is connected to the input end of the condenser.
[0007] The output end of the condenser is connected to the input end of the first throttling device, and the output end of the first throttling device is connected to the input end of the evaporator;
[0008] The cold storage box includes a box body, a pipe passing through the box body, and a cold storage medium disposed between the box body and the pipe. The cold storage box is in direct contact with the compressor, or a heat transfer medium is provided between the cold storage box and the compressor.
[0009] The second switching unit has a second inlet, a third outlet, and a fourth outlet. The second inlet is connected to the output end of the evaporator, the third outlet is connected to the input end of the pipe of the cold storage box, the output end of the pipe of the cold storage box is connected to the input end of the compressor, and the fourth outlet is connected to the input end of the compressor.
[0010] In some embodiments, the refrigeration system further includes a second throttling device, the third outlet of the second switching unit is connected to the input end of the second throttling device, and the output end of the second throttling device is connected to the input end of the pipe of the cold storage box.
[0011] In some embodiments, the refrigeration system further includes a return gas heat exchange tube, the input end of which is connected to the output end of the evaporator, and the output end of which is connected to the second inlet of the second switching unit;
[0012] The return gas heat exchange tube is in direct contact with the first throttling device, or a heat-conducting medium is provided between the return gas heat exchange tube and the first throttling device.
[0013] In some embodiments, the refrigeration system further includes an anti-condensation pipe, the input end of which is connected to the output end of the condenser, and the output end of which is connected to the input end of the first throttling device.
[0014] In some embodiments, the first switching unit is a solenoid valve or an electrically operated switching valve; and / or,
[0015] The second switching unit is a solenoid valve or an electrically operated switching valve; and / or,
[0016] The first throttling device is a capillary tube, a thermostatic expansion valve, an electronic expansion valve, or a float throttling valve.
[0017] In some embodiments, the cold storage box is disposed on top of the compressor and in direct contact with the compressor; and / or,
[0018] The cold storage medium is water, salt solution cold storage agent, polymer cold storage agent, or paraffin.
[0019] In some embodiments, a refrigerant circulates in the refrigeration system. When the refrigeration system is used for refrigeration, the circulation path of the refrigerant is as follows: the refrigerant flows out from the output end of the compressor and into the first inlet of the first switching unit, then flows out from the second outlet of the first switching unit and into the input end of the condenser, then flows out from the output end of the condenser and into the input end of the first throttling device, then flows out from the output end of the first throttling device and into the input end of the evaporator, then flows out from the output end of the evaporator and into the second inlet of the second switching unit, and then flows out from the third outlet of the second switching unit and into the input end of the compressor.
[0020] In some embodiments, when the refrigeration system is used to defrost the evaporator, the circulation path of the refrigerant is as follows: the refrigerant flows out from the output end of the compressor and into the first inlet of the first switching unit, then flows out from the first outlet of the first switching unit and into the output end of the evaporator, then flows out from the output end of the evaporator and into the second inlet of the second switching unit, then flows out from the third outlet of the second switching unit and into the inlet of the pipe of the cold storage box, and then flows out from the outlet of the pipe of the cold storage box and into the input end of the compressor.
[0021] In some embodiments, when the refrigeration system further includes a second throttling device, the input end of the pipe that flows out from the third outlet of the second switching unit and into the cold storage box includes: the input end of the pipe that flows out from the third outlet of the second switching unit and into the second throttling device, and then flows out from the output end of the second throttling device and into the cold storage box.
[0022] Secondly, embodiments of this application provide a refrigeration device, including the refrigeration system described above.
[0023] The refrigeration system provided in this application embodiment, by setting a second switching unit and a cold storage box, and setting the cold storage box to be in direct contact with the compressor, or by setting a heat transfer medium between the cold storage box and the compressor, allows the system to absorb and store the heat emitted by the compressor during operation when the refrigeration system is used for refrigeration, converting it into a high-temperature cold storage medium. When the refrigeration system is used for defrosting, the low-temperature refrigerant flowing out of the evaporator enters the cold storage box through the second switching unit, and the high-temperature cold storage medium in the cold storage box heats the refrigerant in the pipeline, causing the temperature of the refrigerant to rise. This can reduce or avoid the occurrence of liquid refrigerant, thereby preventing liquid slugging accidents in the compressor and extending the service life of the compressor. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.
[0025] Figure 1 This is a schematic diagram of the structure of a refrigeration system provided in an embodiment of this application.
[0026] Component symbol explanation:
[0027] 100. Refrigeration system; 20. Compressor; 31. First switching unit; 40. Condenser; 51. First throttling device; 60. Evaporator; 32. Second switching unit; 70. Cold storage box; 52. Second throttling device; 80. Return gas heat exchange tube; 90. Anti-condensation pipe. Detailed Implementation
[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0030] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0033] See also Figure 1 This application provides a refrigeration system 100, including a compressor 20, a first switching unit 31, a condenser 40, a first throttling device 51, an evaporator 60, a second switching unit 32, and a cold storage box 70.
[0034] The first switching unit 31 has a first inlet, a first outlet and a second outlet. The first inlet is connected to the output end of the compressor 20, the first outlet is connected to the input end of the evaporator 60, and the second outlet is connected to the input end of the condenser 40.
[0035] The output end of the condenser 40 is connected to the input end of the first throttling device 51, and the output end of the first throttling device 51 is connected to the input end of the evaporator 60.
[0036] The cold storage box 70 includes a box body, a pipe passing through the box body, and a cold storage medium disposed between the box body and the pipe. The cold storage box 70 is in direct contact with the compressor 20, or a heat transfer medium is provided between the cold storage box 70 and the compressor 20.
[0037] The second switching unit 32 has a second inlet, a third outlet and a fourth outlet. The second inlet is connected to the output end of the evaporator 60, the third outlet is connected to the input end of the pipe of the cold storage box 70, the output end of the pipe of the cold storage box 70 is connected to the input end of the compressor 20, and the fourth outlet is connected to the input end of the compressor 20.
[0038] For example, the first switching unit 31 is a solenoid valve or an electric switching valve.
[0039] For example, the second switching unit 32 is a solenoid valve or an electric switching valve.
[0040] For example, the first throttling device 51 is a capillary tube, a thermostatic expansion valve, an electronic expansion valve, or a float throttling valve.
[0041] For example, the cold storage box 70 is disposed on top of the compressor 20 and in direct contact with the compressor 20.
[0042] The refrigeration system 100 provided in this application embodiment, by setting a second switching unit 32 and a cold storage box 70, and setting the cold storage box 70 to be in direct contact with the compressor 20, or by setting a heat-conducting medium between the cold storage box 70 and the compressor 20, when the refrigeration system 100 is used for refrigeration, the cold storage medium at room temperature in the cold storage box 70 can absorb and store the heat emitted by the compressor 20 when it is working, and convert it into a high-temperature cold storage medium; when the refrigeration system 100 is used for defrosting, when the low-temperature refrigerant flowing out from the evaporator 60 enters the cold storage box 70 through the second switching unit 32, the high-temperature cold storage medium in the cold storage box 70 heats the refrigerant in the pipeline, so that the temperature of the refrigerant rises, which can reduce or avoid the appearance of liquid refrigerant, thereby avoiding liquid slugging accidents in the compressor 20, and thus extending the service life of the compressor 20.
[0043] For example, the cold storage medium is water, salt solution cold storage agent, polymer cold storage agent or paraffin.
[0044] It is understood that the function of the cold storage medium is to store the heat dissipated by the compressor 20 during operation and to transfer the stored heat to the refrigerant in the cold storage medium pipeline during defrosting, so as to increase the temperature of the refrigerant and thereby reduce the production of liquid refrigerant.
[0045] Understandably, after the high-temperature cold storage medium in the cold storage box 70 heats the refrigerant in the pipeline, the temperature of the cold storage medium decreases and returns to the normal temperature. Then, the cold storage medium continues to absorb the heat generated by the compressor 20 during operation and transfers the heat to the refrigerant in the pipeline of the cold storage box 70 during the defrosting process to heat the refrigerant.
[0046] See also Figure 1 The refrigeration system 100 may further include a second throttling device 52, the third outlet of the second switching unit 32 is connected to the input end of the second throttling device 52, and the output end of the second throttling device 52 is connected to the input end of the pipe of the cold storage box 70.
[0047] For example, the second throttling device 52 is a capillary tube, a thermostatic expansion valve, an electronic expansion valve, or a float throttling valve.
[0048] It is understandable that, since the second throttling device 52 has a pressure reduction function, when the low-temperature and high-pressure refrigerant flowing out of the evaporator 60 enters the second throttling device 52 through the second switching unit 32, the pressure of the refrigerant is reduced. By reducing the pressure, at least a portion of the liquid refrigerant can be converted into gaseous refrigerant, thereby reducing or avoiding liquid slugging accidents of the compressor 20. Furthermore, when the pressure of the refrigerant is reduced, the risk of the compressor 20 being damaged is also reduced, thereby extending the service life of the compressor 20.
[0049] By using the second throttling device 52 in conjunction with the cold storage box 70, the refrigerant with low temperature and high pressure can be depressurized and heated sequentially, thereby reducing or avoiding the generation of liquid refrigerant and reducing the pressure of the refrigerant, ultimately reducing or avoiding liquid slugging accidents of the compressor 20, thereby extending the service life of the compressor 20.
[0050] See also Figure 1 The refrigeration system 100 may further include a return gas heat exchange pipe 80, the input end of which is connected to the output end of the evaporator 60, and the output end of which is connected to the second inlet of the second switching unit 32.
[0051] The return gas heat exchange tube 80 is in direct contact with the first throttling device 51, or a heat-conducting medium is provided between the return gas heat exchange tube 80 and the first throttling device 51.
[0052] It is understandable that by setting the return gas heat exchange pipe 80 to be in direct contact with the first throttling device 51, or by providing a heat-conducting medium between the return gas heat exchange pipe 80 and the first throttling device 51, the high-temperature refrigerant in the first throttling device 51 can be used to heat the low-temperature refrigerant in the return gas heat exchange pipe 80, thereby reducing or avoiding the appearance of liquid refrigerant. This can reduce or avoid liquid slugging accidents in the compressor 20. Furthermore, since the heat of the refrigerant in the first throttling device 51 is absorbed by the low-temperature refrigerant in the return gas heat exchange pipe 80, the temperature of the refrigerant in the first throttling device 51 is reduced, thereby reducing the temperature of the refrigerant entering the evaporator 60 and thus increasing the cooling rate of the refrigeration equipment.
[0053] For example, when the first throttling device 51 is a capillary tube, aluminum foil can be used to wrap the first throttling device 51 around the outer surface of the return gas heat exchange tube 80.
[0054] See also Figure 1 The refrigeration system 100 also includes an anti-condensation pipe 90, the input end of which is connected to the output end of the condenser 40, and the output end of which is connected to the input end of the first throttling device 51.
[0055] Understandably, the anti-condensation pipe 90 can be installed on the door frame of the refrigeration equipment. When the refrigeration system 100 is used for refrigeration, the internal temperature of the refrigeration equipment is low, which leads to a low temperature of the door frame. When the outside air comes into contact with the door frame of the refrigeration equipment, it is easy to condense into dew. This dew is prone to bacteria growth and leads to a poor user experience. By installing the anti-condensation pipe 90, the high-temperature and high-pressure refrigerant flowing out of the condenser 40 can flow through the anti-condensation pipe 90, which can heat the door frame of the refrigeration equipment and prevent condensation from occurring on the door frame.
[0056] See also Figure 1 The refrigeration system 100 contains refrigerant. When the refrigeration system 100 is used for refrigeration, the circulation path of the refrigerant is as follows: the refrigerant flows out from the output end of the compressor 20 and enters the first inlet of the first switching unit 31, then flows out from the second outlet of the first switching unit 31 and enters the input end of the condenser 40, then flows out from the output end of the condenser 40 and enters the input end of the first throttling device 51, then flows out from the output end of the first throttling device 51 and enters the input end of the evaporator 60, then flows out from the output end of the evaporator 60 and enters the second inlet of the second switching unit 32, and then flows out from the third outlet of the second switching unit 32 and enters the input end of the compressor 20.
[0057] See also Figure 1 When the refrigeration system 100 further includes an anti-condensation pipe 90, the phrase "flowing out from the output end of the condenser 40 and into the input end of the first throttling device 51" includes: flowing out from the output end of the condenser 40 and into the input end of the anti-condensation pipe 90, and then flowing out from the output end of the anti-condensation pipe 90 and into the input end of the first throttling device 51.
[0058] See also Figure 1When the refrigeration system 100 further includes a return gas heat exchange tube 80, the phrase "flowing out from the output end of the evaporator 60 and entering the second inlet of the second switching unit 32" includes: flowing out from the output end of the evaporator 60 and entering the input end of the return gas heat exchange tube 80, and then flowing out from the output end of the return gas heat exchange tube 80 and entering the second inlet of the second switching unit 32.
[0059] See also Figure 1 When the refrigeration system 100 is used to defrost the evaporator 60, the circulation path of the refrigerant is as follows: the refrigerant flows out from the output end of the compressor 20 and enters the first inlet of the first switching unit 31, then flows out from the first outlet of the first switching unit 31 and enters the output end of the evaporator 60, then flows out from the output end of the evaporator 60 and enters the second inlet of the second switching unit 32, then flows out from the third outlet of the second switching unit 32 and enters the inlet of the pipe of the cold storage box 70, and then flows out from the outlet of the pipe of the cold storage box 70 and enters the inlet of the compressor 20.
[0060] It is understandable that the above defrosting method is the hot gas defrosting method, which uses the high-temperature and high-pressure refrigerant discharged from the compressor to enter the evaporator, so that the evaporator temporarily acts as a condenser, and the heat released when the high-temperature refrigerant condenses melts the frost layer on the surface of the evaporator.
[0061] See also Figure 1 When the refrigeration system 100 further includes a second throttling device 52, the phrase "the pipe that flows out from the third outlet of the second switching unit 32 and into the cold storage box 70" includes: the pipe that flows out from the third outlet of the second switching unit 32 and into the input end of the second throttling device 52, and then flows out from the output end of the second throttling device 52 and into the input end of the cold storage box 70.
[0062] See also Figure 1 When the refrigeration system 100 further includes a return gas heat exchange tube 80, the phrase "flowing out from the output end of the evaporator 60 and entering the second inlet of the second switching unit 32" includes: flowing out from the output end of the evaporator 60 and entering the input end of the return gas heat exchange tube 80, and then flowing out from the output end of the return gas heat exchange tube 80 and entering the second inlet of the second switching unit 32.
[0063] This application embodiment also provides a refrigeration device, including the refrigeration system 100 as described above.
[0064] For example, the refrigeration equipment includes refrigerators, freezers, beverage coolers, wine coolers, freezers, ice cream machines, ice makers, etc.
[0065] The refrigeration system and refrigeration equipment provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A refrigeration system, characterized in that, It includes a compressor, a first switching unit, a condenser, a first throttling device, an evaporator, a second switching unit, and a cold storage box; The first switching unit has a first inlet, a first outlet, and a second outlet. The first inlet is connected to the output end of the compressor, the first outlet is connected to the input end of the evaporator, and the second outlet is connected to the input end of the condenser. The output end of the condenser is connected to the input end of the first throttling device, and the output end of the first throttling device is connected to the input end of the evaporator; The cold storage box includes a box body, a pipe passing through the box body, and a cold storage medium disposed between the box body and the pipe. The cold storage box is in direct contact with the compressor, or a heat transfer medium is provided between the cold storage box and the compressor. The second switching unit has a second inlet, a third outlet, and a fourth outlet. The second inlet is connected to the output end of the evaporator, the third outlet is connected to the input end of the pipe of the cold storage box, the output end of the pipe of the cold storage box is connected to the input end of the compressor, and the fourth outlet is connected to the input end of the compressor.
2. The refrigeration system according to claim 1, characterized in that, The refrigeration system further includes a second throttling device, the third outlet of the second switching unit is connected to the input end of the second throttling device, and the output end of the second throttling device is connected to the input end of the pipe of the cold storage box.
3. The refrigeration system according to claim 1, characterized in that, The refrigeration system also includes a return gas heat exchange tube, the input end of which is connected to the output end of the evaporator, and the output end of which is connected to the second inlet of the second switching unit. The return gas heat exchange tube is in direct contact with the first throttling device, or a heat-conducting medium is provided between the return gas heat exchange tube and the first throttling device.
4. The refrigeration system according to claim 1, characterized in that, The refrigeration system also includes an anti-condensation pipe, the input end of which is connected to the output end of the condenser, and the output end of which is connected to the input end of the first throttling device.
5. The refrigeration system according to claim 1, characterized in that, The first switching unit is a solenoid valve or an electrically operated switching valve; and / or, The second switching unit is a solenoid valve or an electrically operated switching valve; and / or, The first throttling device is a capillary tube, a thermostatic expansion valve, an electronic expansion valve, or a float throttling valve.
6. The refrigeration system according to claim 1, characterized in that, The cold storage box is disposed on top of the compressor and in direct contact with the compressor; and / or, The cold storage medium is water, salt solution cold storage agent, polymer cold storage agent, or paraffin.
7. The refrigeration system according to any one of claims 1-6, characterized in that, The refrigeration system contains refrigerant. When the refrigeration system is used for refrigeration, the circulation path of the refrigerant is as follows: the refrigerant flows out from the output end of the compressor and enters the first inlet of the first switching unit, then flows out from the second outlet of the first switching unit and enters the input end of the condenser, then flows out from the output end of the condenser and enters the input end of the first throttling device, then flows out from the output end of the first throttling device and enters the input end of the evaporator, then flows out from the output end of the evaporator and enters the second inlet of the second switching unit, and then flows out from the third outlet of the second switching unit and enters the input end of the compressor.
8. The refrigeration system according to any one of claims 1-6, characterized in that, When the refrigeration system is used to defrost the evaporator, the refrigerant circulation path is as follows: the refrigerant flows out from the output end of the compressor and into the first inlet of the first switching unit, then flows out from the first outlet of the first switching unit and into the output end of the evaporator, then flows out from the output end of the evaporator and into the second inlet of the second switching unit, then flows out from the third outlet of the second switching unit and into the inlet of the pipe of the cold storage box, and then flows out from the outlet of the pipe of the cold storage box and into the input end of the compressor.
9. The refrigeration system according to claim 8, characterized in that, When the refrigeration system further includes a second throttling device, the input end of the pipe that flows out from the third outlet of the second switching unit and into the cold storage box includes: the input end of the pipe that flows out from the third outlet of the second switching unit and into the second throttling device, and then flows out from the output end of the second throttling device and into the cold storage box.
10. A refrigeration device, characterized in that, Includes the refrigeration system according to any one of claims 1-9.