Refrigeration system and refrigeration device

Abstract

The application discloses a refrigeration system and a refrigeration equipment, and belongs to the refrigeration field. The refrigeration system comprises a first refrigeration cycle and a second refrigeration cycle. The first refrigeration cycle comprises a first compressor, a first condenser group, a first path of a first regenerative pipe group, a first path of a first evaporative condenser and a second path of the first regenerative pipe group. The second refrigeration cycle comprises a second compressor, a first path of a second regenerative pipe group, a second path of the first evaporative condenser, a low-temperature evaporator, a second liquid accumulator and a second path of the second regenerative pipe group. The first path of the first evaporative condenser is used for cooling the second path of the first evaporative condenser. The application can provide different amounts of refrigerants under different working conditions of the refrigeration system, so that different refrigeration requirements of the refrigeration system can be met, the risk of condensation icing of the second regenerative pipe group is reduced, and the length of the second path of the second regenerative pipe group is shortened.

Description

Technical Field

[0001] This application belongs to the field of refrigeration technology, and in particular relates to a refrigeration system and refrigeration equipment. Background Technology

[0002] With the development of technology, the refrigeration functions of refrigeration equipment have gradually increased. The refrigeration system has different refrigerant requirements under different operating conditions. In some related technologies, the refrigeration system has a mismatch between the refrigerant supply and the refrigerant demand, resulting in poor refrigeration capacity, which needs to be improved. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a refrigeration system and refrigeration equipment that meets different refrigeration needs, reduces the risk of condensation and icing in the second regenerator tube assembly, and improves the stability of the refrigeration system.

[0004] In a first aspect, this application provides a refrigeration system, including: a first refrigeration cycle and a second refrigeration cycle;

[0005] The first refrigeration cycle includes a first compressor, a first condenser group, a first path of a first regenerative tube group, a first path of a first evaporator-condenser, and a second path of the first regenerative tube group;

[0006] The second refrigeration cycle includes a second compressor, a first path of the second regenerative tube assembly, a second path of the first evaporator-condenser, a low-temperature evaporator, a second liquid receiver, and a second path of the second regenerative tube assembly;

[0007] The first path of the first evaporator-condenser is used to cool the second path of the first evaporator-condenser.

[0008] According to the refrigeration system of this application, a second liquid receiver is provided between the low-temperature evaporator and the second path of the second regenerating pipe assembly. On the one hand, the second liquid receiver can provide different amounts of refrigerant under different operating conditions of the refrigeration system, thereby meeting the different refrigeration needs of the refrigeration system, reducing the risk of condensation and icing of the second regenerating pipe assembly, and improving the stability of the refrigeration system. On the other hand, the second liquid receiver can store the low-temperature refrigerant after evaporation by the low-temperature evaporator, which can replace part of the function of the second regenerating pipe assembly. This can increase the return gas temperature, shorten the length of the second path of the second regenerating pipe assembly, make the low-temperature evaporator fully evaporated, improve the compression efficiency of the second compressor, and reduce energy consumption.

[0009] According to one embodiment of this application, along the height direction of the second liquid reservoir, the outlet of the second liquid reservoir is higher than the inlet of the liquid reservoir.

[0010] According to one embodiment of this application, the first refrigeration cycle further includes a first liquid receiver, which is disposed between the second path of the first regenerator tube assembly and the first path of the first evaporator-condenser.

[0011] According to one embodiment of this application, along the height direction of the first liquid reservoir, the outlet of the first liquid reservoir is higher than the inlet of the liquid reservoir.

[0012] According to one embodiment of this application, the second refrigeration cycle further includes a second dryer filter and a second capillary tube, wherein the second dryer filter is disposed between the second path of the first evaporator-condenser and the second capillary tube.

[0013] According to one embodiment of this application, the second refrigeration cycle further includes a second condenser assembly, which is disposed between the second compressor and the first path of the second regenerative tube assembly.

[0014] According to one embodiment of this application, the first path of the first regenerative tube assembly includes a first capillary tube.

[0015] According to one embodiment of this application, the first condenser group includes a baffle condenser and a wire tube condenser connected in series.

[0016] According to one embodiment of this application, the first refrigeration cycle further includes a first drying filter, which is disposed between the first condenser group and the first regenerator tube group.

[0017] According to one embodiment of this application, the first refrigeration cycle further includes a first path of a second evaporator-condenser, the first path of the second evaporator-condenser being disposed between the first condenser group and the first path of the first regenerator tube group; the second refrigeration cycle further includes a second path of a second evaporator-condenser, the second path of the second evaporator-condenser being disposed between the second path of the second regenerator tube group and the second compressor.

[0018] Secondly, this application provides a refrigeration device, including the refrigeration system described in any of the above embodiments.

[0019] According to the refrigeration equipment of this application, a second liquid receiver is provided between the low-temperature evaporator and the second path of the second regenerating pipe assembly. On the one hand, the second liquid receiver can provide different amounts of refrigerant under different operating conditions of the refrigeration system, thereby meeting the different refrigeration needs of the refrigeration system and improving the stability of the refrigeration system. On the other hand, the second liquid receiver can store the low-temperature refrigerant after evaporation by the low-temperature evaporator, which can replace part of the function of the second regenerating pipe assembly. This can increase the return gas temperature, shorten the length of the second path of the second regenerating pipe assembly, make the low-temperature evaporator fully evaporated, improve the compression efficiency of the second compressor, and reduce energy consumption.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is one of the structural schematic diagrams of the refrigeration system provided in the embodiments of this application;

[0023] Figure 2 This is a second schematic diagram of the refrigeration system provided in the embodiments of this application;

[0024] Figure 3 This is the third schematic diagram of the refrigeration system provided in the embodiments of this application;

[0025] Figure 4 This is the fourth schematic diagram of the refrigeration system provided in the embodiments of this application;

[0026] Figure 5 This is the fifth schematic diagram of the refrigeration system provided in the embodiments of this application.

[0027] Figure label:

[0028] First refrigeration cycle 1, first compressor 11, first condenser group 12, shroud condenser 121, wire tube condenser 122, first heat recovery tube group 13, first path of the first heat recovery tube group 131, second path of the first heat recovery tube group 132, first path of the first evaporator condenser 14, first liquid receiver 15, first dryer filter 16, first path of the second evaporator condenser 17;

[0029] Second refrigeration cycle 2, second compressor 21, second heat recovery pipe group 22, first path of second heat recovery pipe group 221, second path of second heat recovery pipe group 222, second path of first evaporator condenser 23, second capillary tube 24, low temperature evaporator 25, second liquid receiver 26, second dryer filter 27, second condenser group 28, second path of second evaporator condenser 29;

[0030] First evaporator-condenser 3, second evaporator-condenser 4. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0032] The following is for reference. Figures 1-5 This application describes a refrigeration system and refrigeration equipment according to embodiments thereof. The refrigeration system is used to refrigerate the storage space of the refrigeration equipment.

[0033] It should be noted that the refrigeration equipment in this embodiment can be understood as a broad refrigeration storage device, including but not limited to refrigerators, freezers, display cases, beverage cabinets, wine cabinets, refrigerated display cases, and refrigerated vending machines. Refrigeration equipment has diverse structural forms and a wide range of applications.

[0034] The refrigeration equipment includes a cabinet and a door. The cabinet includes an outer shell, an inner liner, and an insulation layer located between the outer shell and the inner liner. The outer shell covers the inner liner and provides protection. The insulation layer can be a foam layer, which provides insulation and cushioning. The space between the outer shell and the inner liner forms a compartment for housing machines such as compressors and circuit breakers.

[0035] like Figure 1 and Figure 2 As shown, the refrigeration system of this application embodiment includes: a first refrigeration cycle 1 and a second refrigeration cycle 2. The refrigerants in the first refrigeration cycle 1 and the second refrigeration cycle 2 have different boiling points. Heat exchange can be performed between the first refrigeration cycle 1 and the second refrigeration cycle 2 to improve the refrigeration capacity of the refrigeration system.

[0036] For example, the first refrigeration cycle 1 can be a high-temperature cycle, and the refrigerant of the first refrigeration cycle 1 can be R600a; the second refrigeration cycle 2 can be a low-temperature cycle, and the refrigerant of the second refrigeration cycle 2 can be R290a.

[0037] The first refrigeration cycle 1 includes a first compressor 11, a first condenser group 12, a first path 131 of the first regenerative tube group, a first path 14 of the first evaporator condenser, and a second path 132 of the first regenerative tube group. The second path 132 of the first regenerative tube group is connected to the first compressor 11.

[0038] In the first heat pipe group 13, the first path 131 and the second path 132 of the first heat pipe group exchange heat. The first path 131 of the first heat pipe group heats the second path 132 of the first heat pipe group, which can increase the return gas temperature of the first compressor 11, increase the suction volume, and recover and utilize the waste heat of the heat exchange working fluid, thereby improving the cooling effect and reducing the cooling energy consumption; at the same time, it can reduce the temperature of the first path 14 entering the first evaporator condenser.

[0039] The first path 131 of the first regenerating pipe group may include a first capillary tube, which can reduce the pressure of the refrigerant.

[0040] In some embodiments, the first compressor 11, the first condenser group 12, the first path 131 of the first regenerative tube group, the first path 14 of the first evaporator condenser, and the second path 132 of the first regenerative tube group are connected end to end in sequence.

[0041] like Figure 2 As shown, the first condenser group 12 may include at least one condenser, and the first condenser group 12 is used to condense and cool the high-temperature and high-pressure superheated steam discharged from the first compressor 11.

[0042] In some embodiments, the first condenser group 12 includes a shroud condenser 121 and a wire tube condenser 122 connected in series.

[0043] The wire tube condenser 122 and the baffle condenser 121 are located in different areas of the refrigeration equipment. The wire tube condenser 122 includes a series of small tubes designed to allow refrigerant vapor to flow through while an external cooling medium (such as water or air) flows through to remove the heat from the refrigerant vapor, thereby condensing it into a liquid.

[0044] The condenser 121 with a larger surface area allows for more efficient heat exchange. The condenser 121 comprises at least one plate through which refrigerant flows, while an external cooling medium flows over the outside of the plates to remove heat.

[0045] like Figure 2 As shown, the wire tube condenser 122 and the baffle plate condenser 121 are connected sequentially. The refrigerant vapor first enters the wire tube condenser 122 for initial condensation, and then flows out and enters the baffle plate condenser 121 for further condensation. This sequential connection allows the refrigerant vapor to undergo sufficient heat exchange before completely condensing into a liquid, thus improving the cooling effect.

[0046] A condensing fan is provided on one side of the wire tube condenser 122 to accelerate the condensation of the wire tube condenser 122.

[0047] In some embodiments, the first refrigeration cycle 1 further includes a first dryer filter 16, which is disposed between the first condenser assembly 12 and the first path 131 of the first regenerator tube assembly.

[0048] In this embodiment, a first dryer filter 16 is provided between the condenser 121 and the first capillary tube. The first dryer filter 16 is used to reduce impurities, moisture or other contaminants that may exist in the refrigerant entering the first capillary tube, thereby reducing the risk of blockage of the first capillary tube.

[0049] The second refrigeration cycle 2 includes a second compressor 21, a first path 221 of the second regenerating pipe group, a second path 23 of the first evaporator condenser, a low-temperature evaporator 25, a second liquid receiver 26, and a second path 222 of the second regenerating pipe group. The outlet of the second path 222 of the second regenerating pipe group is connected to the inlet of the second compressor 21.

[0050] In the first evaporator-condenser 3, the first path 14 of the first evaporator-condenser is used to cool the second path 23 of the first evaporator-condenser. The first path 14 of the first evaporator-condenser acts as an evaporator in the first refrigeration cycle 1, and the second path 23 of the first evaporator-condenser acts as a condenser in the second refrigeration cycle 2, so as to improve the refrigeration capacity of the second refrigeration cycle 2 and increase the refrigeration capacity of the refrigeration system; at the same time, it increases the return gas temperature of the first compressor 11 and increases the suction volume.

[0051] In some embodiments, the second refrigeration cycle 2 further includes a second capillary tube 24, which is disposed between the second path 23 of the first evaporator condenser and the low-temperature evaporator 25.

[0052] The second capillary tube 24 is used to throttle and reduce the pressure of the refrigerant flowing out of the second path of the first evaporator-condenser in order to obtain a lower evaporation temperature, such as an evaporation temperature below -60°C. The whole process is a cooling and pressure reduction process.

[0053] The second heat pipe assembly 22 utilizes the cooling energy of the refrigerant saturated vapor from the low-temperature evaporator 25 when it needs to be superheated to further subcool the refrigerant before throttling, and self-heat recovery to increase the refrigerant temperature entering the second compressor 21, reduce the refrigerant temperature entering the low-temperature evaporator, and improve refrigeration efficiency.

[0054] In this embodiment, the second heat recovery pipe group 22 self-heats, and the first path 221 of the second heat recovery pipe group heats the second path 222 of the second heat recovery pipe group to increase the refrigerant temperature entering the second compressor, reduce the refrigerant temperature entering the second path of the first evaporator condenser, increase the compression efficiency of the second compressor 21, and reduce the workload of the second compressor 21.

[0055] A second liquid receiver 26 is provided between the low-temperature evaporator 25 and the second path 222 of the second regenerator tube assembly. The second liquid receiver 26 can collect the low-temperature liquid refrigerant flowing out of the low-temperature evaporator 25.

[0056] It should be noted that the refrigerant requirements of a refrigeration system vary under different operating conditions. The amount of refrigerant required is directly proportional to the refrigeration temperature. If the refrigeration system can only be charged with refrigerant according to the refrigerant requirements for a refrigeration temperature of -18℃ when the refrigeration temperature is -60℃, it will not be able to meet the refrigeration requirements of -60℃ and will affect the refrigeration effect.

[0057] The second liquid reservoir 26 can serve at least the following two functions:

[0058] Firstly, the second liquid receiver 26 can provide different amounts of refrigerant under different operating conditions of the refrigeration system.

[0059] For example, when the cooling temperature is low, the second liquid receiver 26 can provide sufficient refrigerant to the refrigeration system to meet the high load cooling demand and enhance the cooling capacity; when the cooling temperature is high, the second liquid receiver 26 can store excess refrigerant to reduce the amount of refrigerant entering the second path 222 of the second heat return pipe group, thereby reducing the situation where the refrigerant supply exceeds the demand and causes condensation or icing in the second path 222 of the second heat return pipe group, improving the stability of the refrigeration system and meeting various operating conditions of the refrigeration system.

[0060] In actual use, when the cooling temperature is set to -60℃, the refrigerant demand is large, and the receiver can provide sufficient refrigerant to ensure the storage temperature of -60℃. When the temperature is set to -18℃, the refrigerant demand is relatively small. Under the same system, the second receiver 26 can store a portion of the refrigerant, reducing the possibility of excess refrigerant entering the second path 222 of the second regenerator pipe group and causing condensation or icing in the pipes.

[0061] In practical use, when the cooling temperature is set to -5℃ ambient temperature, the condensing temperature is relatively low, and less refrigerant is needed. The refrigerant can be stored in the receiver. However, if the ambient temperature is 43℃, the refrigerant demand is high, and the refrigeration system can utilize the refrigerant in the receiver to meet the high-load cooling requirements.

[0062] Secondly, the second liquid receiver 26 can replace the second path 222 of the second heat recovery pipe group to store refrigerant. Therefore, compared with the scheme without the second liquid receiver 26, the amount of refrigerant stored in the second path 222 of the second heat recovery pipe group can be reduced, the length of the second path 222 of the second heat recovery pipe group can be shortened, the cost can be reduced, and the installation difficulty of the second path 222 of the second heat recovery pipe group can be reduced.

[0063] According to the refrigeration system provided in the embodiments of this application, a second liquid receiver 26 is provided between the low-temperature evaporator 25 and the second path 222 of the second regenerator tube assembly. On the one hand, the second liquid receiver 26 can provide different amounts of refrigerant under different operating conditions of the refrigeration system, thereby meeting different refrigeration needs of the refrigeration system and improving the stability of the refrigeration system. On the other hand, the second liquid receiver 26 can replace some of the functions of the second regenerator tube assembly 22, thereby increasing the return gas temperature, shortening the length of the second path 222 of the second regenerator tube assembly, realizing full liquid evaporation of the low-temperature evaporator 25, improving the compression efficiency of the second compressor 21, and reducing energy consumption.

[0064] In some embodiments, the second refrigeration cycle 2 includes a second compressor 21 connected end to end, a first path 221 of a second regenerating pipe assembly, a second path 23 of a first evaporator-condenser, a second capillary tube 24, a low-temperature evaporator 25, a second liquid receiver 26, and a second path 222 of a second regenerating pipe assembly connected in sequence.

[0065] The working principle of the second refrigeration cycle 2: The refrigerant is compressed into a high-temperature, high-pressure gas in the second compressor 21, and enters the first path 221 of the second heat recovery pipe group, where it exchanges heat with the second path 222 (the return pipe of the second compressor 21) to be cooled. Then, it enters the second path 23 of the first evaporator-condenser, where it exchanges heat with the refrigerant in the first refrigeration cycle 1 and condenses. The condensed refrigerant passes through the second capillary tube 24 for throttling and pressure reduction, and then enters the low-temperature evaporator 25 for evaporation to achieve a cooling effect; the refrigerant gas produced by evaporation enters the second liquid receiver for storage; finally, it returns to the second compressor 21 through the second path 222 of the second heat recovery pipe group to recover heat.

[0066] In some embodiments, along the height direction of the second reservoir 26, the outlet of the second reservoir 26 is higher than the inlet of the reservoir.

[0067] In this embodiment, the second liquid receiver 26 adopts a top-out, bottom-in spatial orientation. That is, the liquid refrigerant flowing out of the low-temperature evaporator 25 can be stored in the second liquid receiver 26, while the gaseous refrigerant flows out from the outlet of the second liquid receiver 26 into the second path 222 of the second heat recovery pipe group. This increases the proportion of gaseous refrigerant entering the second path 222 of the second heat recovery pipe group, reduces the amount of refrigerant entering the second path 222 of the second heat recovery pipe group under low load conditions, and reduces the risk of condensation or icing in the second path 222 of the second heat recovery pipe group.

[0068] In this embodiment, the outlet of the second liquid receiver 26 is higher than the inlet of the second liquid receiver 26, which allows the liquid refrigerant to remain in the second liquid receiver 26 and the gaseous refrigerant to be discharged from the outlet of the second liquid receiver 26, thereby reducing the proportion of liquid refrigerant discharged from the second liquid receiver 26 and increasing the return gas temperature.

[0069] In some embodiments, the second refrigeration cycle 2 further includes a second dryer filter 27 disposed between the second path 23 and the second capillary tube 24 of the first evaporator condenser.

[0070] In this embodiment, a second dryer filter 27 is provided between the second path 23 of the first evaporator condenser and the second capillary tube 24. The second dryer filter 27 is used to reduce impurities, moisture or other contaminants that may exist in the refrigerant entering the second capillary tube 24, thereby reducing the risk of blockage of the second capillary tube 24.

[0071] In some embodiments, the second refrigeration cycle 2 further includes a second condenser group 28, which is disposed between the second compressor 21 and the first path 221 of the second regenerative tube group.

[0072] A second condenser group 28 is provided between the outlet of the second compressor 21 and the first path 221 of the second regenerating pipe group. The second condenser group 28 may include multiple condensers, which may be set in different areas of the refrigeration equipment. For example, the second condenser group 28 may include a back condenser, which may be set at the back of the refrigeration equipment. The second condenser group 28 can condense the high-temperature and high-pressure superheated gas flowing out of the outlet of the second compressor 21 into a high-pressure subcooled liquid, thereby improving the refrigeration efficiency.

[0073] In some embodiments, the first refrigeration cycle 1 further includes a first liquid receiver 15, which is disposed between the second path 132 of the first regenerating tube assembly and the first path 14 of the first evaporator-condenser.

[0074] In related technologies, when the refrigeration equipment operates at a low ambient temperature (≤16℃), the portion of the second path 132 of the first regenerating pipe group of the first refrigeration cycle 1 located within the foaming layer is prone to condensation or even freezing. This is because the first refrigeration cycle 1 operates at a low ambient temperature, reducing the heat load of the refrigeration equipment, lowering the temperature of the first evaporator condenser 3, and reducing the cooling demand of the first refrigeration cycle 1. The first path 14 of the first evaporator condenser sends the incompletely evaporated liquid refrigerant into the second path 132 of the first regenerating pipe group. However, the second path 132 of the first regenerating pipe group of the first refrigeration cycle 1 is structurally long and cannot exchange heat with the incompletely evaporated liquid refrigerant in time. The low temperature of the second path 132 of the first regenerating pipe group easily leads to condensation and freezing.

[0075] In this embodiment, a first liquid receiver 15 is provided between the first path 14 of the first evaporator condenser and the second path 132 of the first regenerator tube group. This receiver can collect the liquid refrigerant flowing out of the outlet of the first path 14 of the first evaporator condenser, thereby increasing the proportion of gaseous refrigerant entering the second path 132 of the first regenerator tube group. Through heat exchange between the first path 131 and the second path 132 of the first regenerator tube group, the refrigerant in the second path 132 of the first regenerator tube group can be raised to above the ambient temperature, reducing the risk of condensation or frost formation in the second path 132 of the first regenerator tube group.

[0076] The working principle of the first refrigeration cycle 1: The refrigerant is compressed into a high-temperature, high-pressure gas in the first compressor 11, enters the first condenser group 12 and is condensed into a high-pressure liquid. Then, after being throttled and depressurized by the first capillary tube of the first regenerative pipe group's first path 131, it enters the first path 14 of the first evaporator-condenser to exchange heat and evaporate with the second path 23 of the first evaporator-condenser. The refrigerant absorbs heat and produces a cooling effect. The refrigerant gas produced by evaporation exchanges heat with the refrigerant in the second refrigeration cycle 2 in the first evaporator-condenser 3, and then enters the first liquid receiver 15 for storage. Finally, the refrigerant heated by the first capillary tube is transported to the first compressor 11 through the return gas pipe group of the second path 132 of the first regenerative pipe group. By increasing the temperature of the refrigerant entering the first compressor 11, the compression efficiency of the first compressor 11 can be improved, and the refrigeration energy consumption can be reduced.

[0077] In some embodiments, along the height direction of the first reservoir 15, the outlet of the first reservoir 15 is higher than the inlet of the reservoir.

[0078] In this embodiment, the first liquid receiver 15 adopts a top-out, bottom-in configuration in the spatial direction. That is, the liquid refrigerant flowing out from the first path of the first evaporator condenser 3 can be stored in the first liquid receiver 15, while the gaseous refrigerant flows out from the outlet of the first liquid receiver 15 into the second path 132 of the first regenerator tube group. This increases the proportion of gaseous refrigerant entering the second path of the first regenerator tube group 13 and reduces the risk of condensation or icing between the first outlet of the first evaporator condenser 3 and the second inlet of the first regenerator tube group 13.

[0079] The outlet of the first liquid receiver 15 is higher than the inlet of the first liquid receiver 15, which allows the liquid refrigerant to remain in the first liquid receiver 15 and the gaseous refrigerant to be discharged from the outlet of the first liquid receiver 15, thereby reducing the proportion of liquid refrigerant discharged from the first liquid receiver 15.

[0080] The outlet of the first evaporator 14 is higher than the inlet of the first liquid receiver 15. The outlet of the first evaporator 14 is connected to the inlet of the first liquid receiver 15 through a downwardly extending pipe, which facilitates the flow of liquid refrigerant from the first evaporator 14 into the first liquid receiver 15, reduces the liquid refrigerant residue at the outlet of the first evaporator 14, reduces the liquid refrigerant residue in the pipe, and reduces the risk of condensation or icing.

[0081] The outlet of the first liquid receiver 15 is higher than the inlet of the second path 132 of the first regenerating pipe group. The outlet of the first liquid receiver 15 is connected to the inlet of the second path 132 of the first regenerating pipe group through a downwardly extending pipe. This can reduce the proportion of liquid refrigerant discharged from the first liquid receiver 15, increase the liquid refrigerant residue in the pipe, thereby increasing the proportion of gaseous refrigerant entering the first liquid receiver 15, improving the cooling effect, and reducing the risk of condensation or icing.

[0082] This application also provides a refrigeration device, including the refrigeration system of any of the above embodiments.

[0083] The refrigeration equipment in this embodiment can be understood as a broad category of refrigeration storage equipment, including but not limited to refrigerators, freezers, display cases, beverage cabinets, wine cabinets, refrigerated display cases, and refrigerated vending machines. Refrigeration equipment has diverse structural forms and a wide range of applications.

[0084] According to the refrigeration equipment provided in the embodiments of this application, a second liquid receiver 26 is provided between the low-temperature evaporator 25 and the second path 222 of the second regenerator tube assembly. On the one hand, the second liquid receiver 26 can provide different amounts of refrigerant under different operating conditions of the refrigeration system, thereby meeting the different refrigeration needs of the refrigeration system and improving the stability of the refrigeration system. On the other hand, the second liquid receiver 26 can store the low-temperature refrigerant after evaporation in the low-temperature evaporator 25, which can replace part of the function of the second regenerator tube assembly 22. This can increase the return gas temperature, shorten the length of the second path 222 of the second regenerator tube assembly, make the low-temperature evaporator 25 fully evaporated, improve the compression efficiency of the second compressor 21, and reduce energy consumption.

[0085] In some embodiments, such as Figure 5 As shown, the first refrigeration cycle 1 also includes a first path 17 of the second evaporator condenser, which is located between the first condenser group 12 and the first path 131 of the first regenerating pipe group; the second refrigeration cycle 2 also includes a second path 29 of the second evaporator condenser, which is located between the second path 222 of the second regenerating pipe group and the second compressor 21.

[0086] The first refrigeration cycle 1 includes a first compressor 11, a first condenser group 12, a first path 17 of a second evaporator condenser, a first dryer filter 16, a first path 131 of a first regenerator tube group, a first path 14 of a first evaporator condenser, a first liquid receiver 15, and a second path 132 of the first regenerator tube group, which are connected in sequence.

[0087] The second refrigeration cycle 2 includes a second compressor 21 connected in sequence, a second condenser group 28, a first path 221 of the second regenerating pipe group, a second path 23 of the first evaporator condenser, a second dryer filter 27, a second capillary tube 24, a low-temperature evaporator 25, a second liquid receiver 26, a second path 222 of the second regenerating pipe group, and a second path 29 of the second evaporator condenser.

[0088] In this embodiment, the first path 17 of the second evaporator-condenser functions as a condenser in the first refrigeration cycle 1, and the second path 29 of the second evaporator-condenser functions as an evaporator in the second refrigeration cycle 2. The first path 17 and the second path 29 of the second evaporator-condenser exchange heat, which can increase the temperature of the refrigerant in the second path 29 of the second evaporator-condenser, increase the return gas temperature of the second compressor 21, and increase the suction volume, thereby increasing the refrigerant flow rate and increasing the cooling capacity. At the same time, it can decrease the temperature of the refrigerant in the first path 17 of the second evaporator-condenser, and the condensation temperature decreases. With the cooling supply of the first heat recovery tube group remaining unchanged, the cooling effect of the first refrigeration cycle 1 is enhanced and the power consumption is reduced.

[0089] like Figure 3 As shown, this application also provides a refrigeration system, including: a first refrigeration cycle 1 and a second refrigeration cycle 2;

[0090] The first refrigeration cycle 1 includes a first compressor 11, a first condenser group 12, a first path 131 of a first regenerating pipe group, a first path 14 of a first evaporator-condenser, and a second path 132 of the first regenerating pipe group connected in sequence; the second refrigeration cycle 2 includes a second compressor 21, a second path 23 of a first evaporator-condenser, a second capillary tube 24, a low-temperature evaporator 25, and a second liquid receiver 26 connected in sequence; wherein, the first path 14 of the first evaporator-condenser is used to cool the second path 23 of the first evaporator-condenser.

[0091] According to the refrigeration system provided in the embodiments of this application, by providing a second liquid receiver 26 between the low-temperature evaporator 25 and the second compressor 21, different amounts of refrigerant can be provided under different operating conditions of the refrigeration system, thereby meeting different refrigeration needs of the refrigeration system and improving the stability of the refrigeration system.

[0092] In some embodiments, such as Figure 3 As shown, the first refrigeration cycle 1 also includes a first liquid receiver 15, which is disposed between the second path 132 of the first regenerating tube group and the first path 14 of the first evaporator-condenser.

[0093] In this embodiment, a first liquid receiver 15 is provided between the first path 14 of the first evaporator condenser and the second path 132 of the first regenerator tube group. This receiver can collect the liquid refrigerant flowing out of the outlet of the first path 14 of the first evaporator condenser, thereby increasing the proportion of gaseous refrigerant entering the second path 132 of the first regenerator tube group. Through heat exchange between the first path 131 and the second path 132 of the first regenerator tube group, the refrigerant in the second path 132 of the first regenerator tube group can be raised to above the ambient temperature, reducing the risk of condensation or frost formation in the second path 132 of the first regenerator tube group.

[0094] like Figure 4 As shown, this application also provides a refrigeration system, including: a first refrigeration cycle 1 and a second refrigeration cycle 2.

[0095] The first refrigeration cycle 1 includes a first compressor 11, a first condenser group 12, a first path 17 of a second evaporator condenser, a first path 131 of a first regenerator tube group, a first path 14 of a first evaporator condenser, and a second path 132 of a first regenerator tube group, all connected in sequence. The second refrigeration cycle 2 includes a second compressor 21, a second condenser group 28, a second path 23 of a first evaporator condenser, a second capillary tube 24, a low-temperature evaporator 25, and a second path 29 of a second evaporator condenser, all connected in sequence.

[0096] The first path 131 of the first regenerating pipe group may include a first capillary tube.

[0097] In the first heat pipe group 13, the first path 131 and the second path 132 of the first heat pipe group exchange heat. The first path 131 of the first heat pipe group is used to heat the second path 132 of the first heat pipe group, which can increase the return gas temperature of the first compressor 11, increase the suction volume, and recover and utilize the waste heat of the heat exchange working medium, thereby improving the cooling effect and reducing the cooling energy consumption; at the same time, it can reduce the temperature of the first path 14 entering the first evaporator condenser.

[0098] In the first evaporator-condenser 3, the first path 14 of the first evaporator-condenser is used to cool the second path 23 of the first evaporator-condenser. The first path 14 of the first evaporator-condenser acts as an evaporator in the first refrigeration cycle 1, and the second path 23 of the first evaporator-condenser acts as a condenser in the second refrigeration cycle 2.

[0099] In the second evaporator-condenser 4, the first path 17 of the second evaporator-condenser acts as a condenser in the first refrigeration cycle 1, and the second path 29 of the second evaporator-condenser acts as an evaporator in the second refrigeration cycle 2. The first path 17 and the second path 29 of the second evaporator-condenser exchange heat, which on the one hand can increase the temperature of the refrigerant in the second path 29 of the second evaporator-condenser, increase the return gas temperature of the second compressor 21, increase the suction volume, thereby increasing the refrigerant flow rate and increasing the cooling capacity; on the other hand, it can decrease the temperature of the refrigerant in the first path 17 of the second evaporator-condenser, and the condensation temperature decreases. With the cooling supply of the first heat recovery tube group remaining unchanged, the cooling effect of the first refrigeration cycle 1 is enhanced and the power consumption is reduced.

[0100] In some embodiments, such as Figure 4 As shown, the second refrigeration cycle 2 includes a second liquid receiver 26, which is disposed between the low-temperature evaporator 25 and the second path 29 of the second evaporator-condenser. The second liquid receiver 26 can collect the low-temperature liquid refrigerant flowing out of the low-temperature evaporator 25.

[0101] According to the refrigeration system provided in the embodiments of this application, a second liquid receiver 26 is provided between the low-temperature evaporator 25 and the second path 29 of the second evaporator-condenser. On the one hand, the second liquid receiver 26 can provide different amounts of refrigerant under different operating conditions of the refrigeration system, thereby meeting the different refrigeration needs of the refrigeration system and improving the stability of the refrigeration system; on the other hand, the second liquid receiver 26 can shorten the length of the second path 29 of the second evaporator-condenser and reduce costs.

[0102] In some embodiments, along the height direction of the second reservoir 26, the outlet of the second reservoir 26 is higher than the inlet of the reservoir.

[0103] In this embodiment, the outlet of the second liquid receiver 26 is higher than the inlet of the second liquid receiver 26, which allows the liquid refrigerant to remain in the second liquid receiver 26 and the gaseous refrigerant to be discharged from the outlet of the second liquid receiver 26, thereby reducing the proportion of liquid refrigerant discharged from the second liquid receiver 26 and increasing the return gas temperature.

[0104] In some embodiments, such as Figure 4 As shown, the first refrigeration cycle 1 also includes a first liquid receiver 15, which is disposed between the second path 132 of the first regenerating tube group and the first path 14 of the first evaporator-condenser.

[0105] In this embodiment, a first liquid receiver 15 is provided between the first path 14 of the first evaporator condenser and the second path 132 of the first regenerator tube group. This receiver can collect the liquid refrigerant flowing out of the outlet of the first path 14 of the first evaporator condenser, thereby increasing the proportion of gaseous refrigerant entering the second path 132 of the first regenerator tube group. Through heat exchange between the first path 131 and the second path 132 of the first regenerator tube group, the refrigerant in the second path 132 of the first regenerator tube group can be raised to above the ambient temperature, reducing the risk of condensation or frost formation in the second path 132 of the first regenerator tube group.

[0106] In some embodiments, along the height direction of the first reservoir 15, the outlet of the first reservoir 15 is higher than the inlet of the reservoir.

[0107] In this embodiment, the outlet of the first liquid receiver 15 is higher than the inlet of the first liquid receiver 15, which allows the liquid refrigerant to remain in the first liquid receiver 15 and the gaseous refrigerant to be discharged from the outlet of the first liquid receiver 15, thereby reducing the proportion of liquid refrigerant discharged from the first liquid receiver 15.

[0108] In some embodiments, such as Figure 5As shown, the second refrigeration cycle 2 also includes a second regenerator tube assembly 22. The first path 221 of the second regenerator tube assembly is located between the second compressor 21 and the second path 23 of the first evaporator-condenser, and the second path 222 of the second regenerator tube assembly is located between the low-temperature evaporator 25 and the second path 29 of the second evaporator-condenser.

[0109] In this embodiment, through heat exchange between the first path 221 and the second path 222 of the second heat recovery pipe group, the first path 221 of the second heat recovery pipe group can raise the temperature of the second path 222 of the second heat recovery pipe group, thereby increasing the temperature of the second path 29 of the second evaporator condenser, further increasing the return gas temperature entering the second compressor 21, while recovering residual cold to reduce the condensation temperature, improving the compression efficiency of the second compressor 21, and reducing the workload of the second compressor 21.

[0110] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0111] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0112] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0113] In the description of this application, "multiple" means two or more.

[0114] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0115] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0116] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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.

[0117] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A refrigeration system characterized by, include: First refrigeration cycle and second refrigeration cycle; The first refrigeration cycle includes a first compressor, a first condenser group, a first path of a first regenerative tube group, a first path of a first evaporator-condenser, and a second path of the first regenerative tube group; The second refrigeration cycle includes a second compressor, a first path of the second regenerative tube assembly, a second path of the first evaporator-condenser, a low-temperature evaporator, a second liquid receiver, and a second path of the second regenerative tube assembly; The first path of the first evaporator-condenser is used to cool the second path of the first evaporator-condenser.

2. The refrigeration system of claim 1, wherein, Along the height direction of the second liquid reservoir, the outlet of the second liquid reservoir is higher than the inlet of the liquid reservoir.

3. The refrigeration system of claim 1, wherein, The first refrigeration cycle further includes a first liquid receiver, which is disposed between the first path of the first evaporator-condenser and the second path of the first regenerative tube assembly.

4. The refrigeration system of claim 3, wherein, Along the height direction of the first liquid reservoir, the outlet of the first liquid reservoir is higher than the inlet of the liquid reservoir.

5. The refrigeration system of claim 1, wherein, The second refrigeration cycle also includes a second condenser assembly, which is disposed between the second compressor and the first path of the second regenerative tube assembly.

6. The refrigeration system according to any one of claims 1-5, characterized in that, The first path of the first regenerating tube assembly includes a first capillary tube.

7. The refrigeration system of any of claims 1-5, wherein, The first condenser group includes a shroud condenser and a wire tube condenser connected in series.

8. The refrigeration system of any of claims 1-5, wherein, The first refrigeration cycle further includes a first dryer filter, which is disposed between the first condenser assembly and the first regenerator tube assembly in a first path; and / or, The second refrigeration cycle further includes a second dryer filter and a second capillary tube, wherein the second dryer filter is disposed between the second path of the first evaporator-condenser and the second capillary tube.

9. The refrigeration system of any of claims 1-5, wherein, The first refrigeration cycle further includes a first path of a second evaporator-condenser, which is disposed between the first condenser group and the first path of the first regenerator tube group; the second refrigeration cycle further includes a second path of a second evaporator-condenser, which is disposed between the second path of the second regenerator tube group and the second compressor.

10. A refrigeration appliance characterized in that, The refrigeration system includes any one of claims 1-9.

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