Refrigerating system and control method thereof, controller, storage medium and program product

Abstract

The invention provides a refrigerating system and a control method thereof, a controller, a storage medium and a program product, the refrigerating system comprises a compressor, a first condenser, a first evaporation assembly, a second evaporation assembly, a component separator, a condensation heat exchange device and a throttling device, and a separator inlet of the component separator communicates with an exhaust port of the compressor through the first condenser; the liquid phase output port is communicated with an air return port of the compressor through the first evaporation assembly; the condensation heat exchange device is provided with a first channel and a second channel, the first evaporation assembly is further communicated with an air return port of the compressor through the throttling device and the first channel, and a gas phase output port of the component separator is communicated with the air return port of the compressor through the second channel and the second evaporation assembly. Gas-liquid separation of the mixed refrigerant is achieved through the component separator, cooperative work of the first evaporation assembly and the second evaporation assembly is combined, heat exchange and throttling optimization of the condensation heat exchange device and the throttling device are matched, and the problems of low refrigeration efficiency and uneven temperature stratification can be solved.

Description

Technical Field

[0001] This application relates to the field of freezer technology, and in particular to a refrigeration system and its control method, controller, storage medium and program product. Background Technology

[0002] In related technologies, conventional refrigeration systems often suffer from insufficient freezing capacity and slow freezing speed when freezing goods. In particular, the freezing performance of conventional refrigeration systems cannot meet the freezing requirements of high-end goods, resulting in significant damage to the nutritional value of these goods and affecting user experience. Specifically, conventional refrigeration systems typically have the following drawbacks: First, low refrigeration efficiency and insufficient freezing speed, resulting in large ice crystals that easily damage the nutritional value of goods during freezing; second, uneven temperature distribution, as conventional refrigeration systems usually employ a direct cooling mode, leading to uneven temperatures between the upper and lower parts of the body. Summary of the Invention

[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 its control method, controller, storage medium, and program product, aiming to solve problems such as low refrigeration efficiency and uneven temperature stratification in refrigeration systems.

[0004] In a first aspect, embodiments of this application provide a refrigeration system, including: Compressor, first condenser, first evaporator assembly, and second evaporator assembly; The component separator is provided with a separator inlet, a liquid phase outlet and a gas phase outlet. The separator inlet is connected to the compressor exhaust port through the first condenser, and the liquid phase outlet is connected to the compressor return port through the first evaporation assembly. The condensing heat exchanger and the throttling device are provided. The condensing heat exchanger is provided with a first channel and a second channel for heat exchange. The first evaporation component is also connected to the return port of the compressor through the throttling device and the first channel. The gas phase output port of the component separator is connected to the return port of the compressor through the second channel and the second evaporation component.

[0005] According to some embodiments of this application, the first evaporation assembly includes a first throttle and a first evaporation coil. The inlet of the first throttle is connected to the liquid phase outlet, and the outlet of the first throttle is connected to the first return gas port of the compressor through the first evaporation coil.

[0006] According to some embodiments of this application, the outlet of the first throttle is also connected to the first return port of the compressor via a throttling device and a first channel.

[0007] According to some embodiments of this application, the second evaporation assembly includes a second throttle and a second evaporation coil. The inlet of the second throttle is connected to the outlet of the second channel, and the outlet of the second throttle is connected to the second return port of the compressor through the second evaporation coil.

[0008] According to some embodiments of this application, the condensing heat exchange device includes a second condenser, which is provided with a first segmented channel and a second segmented channel for heat exchange. The throttling device includes a third throttler, which is disposed at the inlet of the first segmented channel and connected to the first evaporation assembly. The outlet of the first segmented channel is connected to the return port of the compressor. The inlet of the second segmented channel is connected to the gas phase outlet and the outlet of the second segmented channel is connected to the second evaporation assembly.

[0009] According to some embodiments of this application, the condensing heat exchange device includes a plurality of second condensers, each of which is provided with a first segmented channel and a second segmented channel for heat exchange, and the throttling device includes a plurality of third throttling devices, with one second condenser corresponding to one third throttling device. Among them, multiple third throttle valves and multiple first segmented channels are alternately connected, the inlet of the first third throttle valve is connected to the first evaporation component, and the outlet of the first segmented channel at the end is connected to the return port of the compressor. In addition, multiple second-segment channels are connected in series. The inlet of the first second-segment channel is connected to the gas phase outlet, and the outlet of the last second-segment channel is connected to the second evaporation unit.

[0010] According to some embodiments of this application, the refrigeration system includes an outer wall and an inner liner, the inner liner being located inside the outer wall, and a first evaporator coil being located between the outer wall and the inner liner and wound around the outer surface of the inner liner.

[0011] According to some embodiments of this application, the refrigeration system further includes at least one of the following: An external insulation layer is located between the outer wall and the first evaporator coil. The inner insulation layer is located between the first evaporator coil and the inner liner. Temperature equalization plate, located between the first evaporator coil and the inner liner.

[0012] According to some embodiments of this application, the first evaporation component is a direct-cooling evaporation component, and the second evaporation component is an air-cooling evaporation component.

[0013] Secondly, embodiments of this application provide a control method for a refrigeration system, applied to the refrigeration system described in the first aspect, the method comprising: Obtain the operating status parameters of the refrigeration system; Determine the target operating mode of the refrigeration system based on the operating status parameters; Control the refrigeration system to operate in the target working mode.

[0014] According to some embodiments of this application, the target operating mode of the refrigeration system is determined based on operating status parameters, including at least one of the following: When the operating status parameters include the compartment temperature, if the compartment temperature is greater than or equal to the preset temperature, the target operating mode of the refrigeration system is determined to be the refrigeration mode. When the operating status parameters include the compartment temperature and the defrosting time interval of the second evaporator, if the compartment temperature is lower than the preset temperature and the defrosting time interval reaches the preset defrosting time, the target operating mode of the refrigeration system is determined to be the defrosting mode.

[0015] According to some embodiments of this application, controlling the refrigeration system to operate in a target operating mode includes one of the following: When the target operating mode is cooling mode, turn on the compressor; When the target operating mode is defrosting mode, the compressor is turned off and the defrosting heater for defrosting the second evaporator is turned on.

[0016] Thirdly, embodiments of this application provide a controller, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor runs the computer program, it executes the control method of the refrigeration system described in the second aspect.

[0017] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions for performing the control method of the refrigeration system as described in the second aspect above.

[0018] Fifthly, embodiments of this application provide a computer program product, including a computer program or computer instructions, characterized in that the computer program or computer instructions are stored in a computer-readable storage medium, the processor of a computer device reads the computer program or computer instructions from the computer-readable storage medium, and the processor executes the computer program or computer instructions, causing the computer device to perform the control method of the cooling system as described in the second aspect above.

[0019] According to the technical solution of the embodiments of this application, at least the following beneficial effects are achieved: the refrigeration system of the embodiments of this application realizes gas-liquid separation of mixed refrigerant through component separator, combined with the cooperative work of the first evaporation component and the second evaporation component, and with the heat exchange and throttling optimization of condensation heat exchange device and throttling device, it can effectively solve the problems of low refrigeration efficiency and uneven temperature stratification of conventional refrigeration systems. Specifically, firstly, the separated liquid refrigerant enters the first evaporation component for throttling and medium-temperature evaporation, which offsets external heat infiltration and ensures a basic insulation environment inside the freezer. Meanwhile, the gaseous refrigerant flows through the second channel of the condensation heat exchanger, exchanging heat with the refrigerant that has been throttled and flows into the first channel, thus condensing into a liquid and undergoing sufficient subcooling. It then enters the second evaporation component for throttling and ultra-low temperature refrigeration. Forced convection significantly improves the heat transfer coefficient with the goods, greatly enhancing refrigeration efficiency and freezing speed, reducing the formation of large ice crystals, and lowering the risk of nutritional damage to the goods. Furthermore, the forced convection characteristics of the second evaporation component, combined with the basic insulation of the first evaporation component, effectively eliminate the temperature stratification problem of conventional direct cooling modes, ensuring uniform temperature throughout the freezer. This balances deep freezing and uniform temperature preservation, meeting the freezing needs of goods and improving the user experience.

[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 accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0022] Figure 1 This is a schematic diagram of a refrigeration system provided in one embodiment of this application; Figure 2 This is a schematic diagram of a refrigeration system provided in another embodiment of this application; Figure 3 This is a schematic diagram of the structure of a refrigeration system provided in one embodiment of this application; Figure 4 This is a structural cross-sectional view of a refrigeration system provided in one embodiment of this application; Figure 5 This is a flowchart of a control method for a refrigeration system provided in one embodiment of this application; Figure 6 This is a flowchart of a control method for a refrigeration system when the temperature in the compartment is greater than or equal to a preset temperature, provided in one embodiment of this application; Figure 7This is a flowchart of a control method for a refrigeration system provided in one embodiment of this application when the compartment temperature is lower than a preset temperature and the defrosting time interval reaches a preset defrosting time; Figure 8 This is an overall flowchart of a control method for a refrigeration system provided in one embodiment of this application; Figure 9 This is a schematic diagram of a controller for performing a control method for a refrigeration system according to an embodiment of this application. Detailed Implementation

[0023] 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.

[0024] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0025] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0027] In some situations, conventional refrigeration systems often suffer from insufficient freezing capacity and slow freezing speed when freezing goods. In particular, the freezing performance of conventional refrigeration systems cannot meet the freezing requirements of high-end goods, resulting in significant damage to the nutritional value of these goods and affecting user experience. Specifically, conventional refrigeration systems typically have the following drawbacks: First, low cooling efficiency and insufficient freezing speed, resulting in large ice crystals that easily damage the nutritional value of the goods; Second, uneven temperature distribution, as conventional refrigeration systems usually use a direct cooling mode, leading to uneven temperatures between the upper and lower parts of the body.

[0028] Based on the above, this application proposes a refrigeration system and its control method, controller, storage medium and program product, aiming to solve problems such as low refrigeration efficiency and uneven temperature stratification in refrigeration systems.

[0029] The various embodiments of the refrigeration system of this application will be further described below with reference to the accompanying drawings.

[0030] like Figures 1 to 2 As shown, Figure 1 This is a schematic diagram of a refrigeration system provided in one embodiment of this application. Figure 2 This is a schematic diagram of a refrigeration system provided in another embodiment of this application.

[0031] In one embodiment, the refrigeration system includes, but is not limited to, a compressor 100, a first condenser 200, a first evaporator assembly 400, a second evaporator assembly 500, a component separator 300, a condensing heat exchange device, and a throttling device. The condensing heat exchange device is provided with a first channel and a second channel for heat exchange. The component separator 300 is provided with a separator inlet, a liquid phase outlet, and a gas phase outlet. The separator inlet is connected to the exhaust port of the compressor 100 via the first condenser 200, and the liquid phase outlet is connected to the return port of the compressor 100 via the first evaporator assembly 400. The first evaporator assembly 400 is also connected to the return port of the compressor 100 via the throttling device and the first channel. The gas phase outlet of the component separator 300 is connected to the return port of the compressor 100 via the second channel and the second evaporator assembly 500.

[0032] Specifically, the high-temperature, high-pressure refrigerant discharged from the compressor 100 first flows through the first condenser 200 for cooling, and then enters the component separator 300 through the separator inlet to achieve gas-liquid separation. The separated liquid refrigerant is discharged from the liquid phase outlet, undergoes throttling and evaporative heat exchange in the first evaporator 400, and then flows into the return port of the compressor 100. At the same time, a portion of the liquid refrigerant after throttling in the first evaporator 400 will enter the first channel of the condensing heat exchanger after being throttled by the throttling device. The gaseous refrigerant separated by the component separator 300 is discharged from the gas phase outlet and enters the second channel of the condensing heat exchanger. After heat exchange is completed in the first and second channels, the refrigerant in the first channel flows into the return port of the compressor 100, and the refrigerant in the second channel flows through the second evaporator 500 for throttling and evaporative heat exchange, and finally flows into the return port of the compressor 100, forming a complete refrigeration cycle.

[0033] It should be noted that the refrigeration system in this embodiment achieves gas-liquid separation of the mixed refrigerant through the component separator 300. Combined with the coordinated work of the first evaporation component 400 and the second evaporation component 500, and with the heat exchange and throttling optimization of the condensing heat exchange device and the throttling device, it can effectively solve the problems of low refrigeration efficiency and uneven temperature stratification in conventional refrigeration systems. Specifically, firstly, the separated liquid refrigerant enters the first evaporation component 400 for throttling and medium-temperature evaporation, which offsets external heat infiltration and ensures a basic insulation environment inside the freezer. Meanwhile, the gaseous refrigerant flows through the second channel of the condensation heat exchanger, exchanging heat with the refrigerant that has been throttled and flows into the first channel, thus condensing into a liquid and undergoing sufficient subcooling. It then enters the second evaporation component 500 for throttling and deep-crystallization / ultra-low temperature refrigeration. Forced convection significantly improves the heat exchange coefficient with the goods, greatly enhancing refrigeration efficiency and freezing speed, reducing the formation of large ice crystals, and lowering the risk of nutritional damage to the goods. Furthermore, the forced convection characteristics of the second evaporation component 500, combined with the basic insulation of the first evaporation component 400, effectively eliminate the temperature stratification problem of conventional direct cooling modes, ensuring uniform temperature throughout the freezer, balancing deep-crystallization and uniform temperature preservation, meeting the freezing needs of goods, and improving the user experience.

[0034] It should be noted that the first evaporation component can be a direct-cooling evaporation component, and the second evaporation component can be an air-cooling evaporation component.

[0035] In one embodiment, the first evaporation assembly 400 includes a first throttle 410 and a first evaporation coil 420. The inlet of the first throttle 410 is connected to the liquid phase outlet, and the outlet of the first throttle 410 is connected to the first return gas port of the compressor 100 through the first evaporation coil 420. The outlet of the first throttle 410 is also connected to the first return gas port of the compressor 100 through a throttling device and a first channel.

[0036] Specifically, after the liquid refrigerant separated by the component separator 300 is discharged from the liquid output port, it first enters the first throttling device 410 of the first evaporation assembly 400. After being throttled and depressurized by the first throttling device 410, it is divided into two paths: one path flows directly into the first evaporation coil 420, where heat exchange is completed through a medium-temperature evaporation process to offset the heat that seeps into the freezer from the outside. The refrigerant after heat exchange eventually flows into the first return port of the compressor 100, i.e., the medium-temperature return port; the other path flows through the throttling device for secondary or multiple throttling, and then enters the first channel of the condensing heat exchange device, where it completes heat exchange with the gaseous refrigerant from the gaseous output port of the component separator 300 in the second channel of the condensing heat exchange device. The refrigerant after heat exchange also flows into the first return port of the compressor 100, forming a complete cycle on the direct cooling side, while cooperating with the air-cooled side cycle to complete the entire system's refrigeration process.

[0037] It should be noted that, firstly, the embodiments of this application utilize the first evaporator coil 420 to achieve basic insulation inside the freezer; secondly, by using the heat exchange coordination of secondary or multiple throttling and condensation heat exchange devices, it can provide cooling capacity for the condensation of gaseous refrigerant, promoting its full subcooling to improve the subsequent deep-freezing efficiency of the air-cooled side, and also maximize the utilization of the cooling capacity of the liquid refrigerant, improving the system's energy utilization rate; in addition, the stable heat exchange on the direct cooling side combined with the forced convection heat exchange on the air-cooled side can optimize the temperature uniformity inside the freezer, avoid the temperature stratification problem of conventional direct cooling, and improve the overall cooling efficiency, accelerate the freezing speed, reduce the nutritional damage to goods caused by the formation of large ice crystals, and take into account the requirements of insulation, energy saving and high-quality freezing.

[0038] Additionally, it should be noted that the first evaporator coil 420 is wound around the housing 700 of the refrigeration system. This winding structure allows the cooling energy to be transferred more evenly to the housing 700. In conjunction with the second evaporator assembly 500 inside the housing 700, during quick-freezing operation, not only can the moisture in the air inside the housing 700 be removed, but the frost on the inner wall of the housing 700 can also sublimate into the low-temperature air, achieving frost-free inner walls. Through system control, during air-cooled defrosting, the system increases direct cooling to suppress temperature fluctuations, achieving defrosting without stopping the system and reducing temperature fluctuations.

[0039] It should be noted that the first evaporator coil 420 can be a direct-cooling evaporator coil.

[0040] In one embodiment, the second evaporation assembly 500 includes a second throttle 510 and a second evaporation coil 520. The inlet of the second throttle 510 is connected to the outlet of the second channel, and the outlet of the second throttle 510 is connected to the second return port of the compressor 100 through the second evaporation coil 520.

[0041] Specifically, after the refrigerant in the second channel of the condensing heat exchanger completes heat exchange with the refrigerant in the first channel, the fully subcooled liquid refrigerant is discharged from the outlet of the second channel and enters the second throttle 510 of the second evaporation assembly 500 for throttling and pressure reduction, transforming into a low-temperature, low-pressure gas-liquid mixture, and then flows into the second evaporation coil 520; then, in the second evaporation coil 520, the refrigerant fully contacts the goods in the compartment of the box 700 through forced convection and absorbs heat, and after completing the evaporation phase change, it is transformed into a low-temperature gaseous refrigerant, and finally flows back to the second return port of the compressor 100, that is, the low-temperature return port, to form a complete dual-path refrigeration cycle in conjunction with the return gas on the direct cooling side.

[0042] It should be noted that the throttling design of the second throttling device 510 ensures the temperature and pressure compatibility when the refrigerant enters the second evaporator coil 520. Combined with the forced convection heat transfer characteristics of the second evaporator coil 520, it significantly improves the heat transfer coefficient between the refrigerant and the surface of the goods. This not only enables the goods to be frozen very quickly and deeply, significantly shortening the freezing time, but also effectively avoids the formation of large ice crystals caused by uneven heat transfer in conventional freezers, thus maximizing the protection of the nutritional components and quality of the goods.

[0043] In addition, it should be noted that the forced convection mode of air cooling can promote rapid air circulation in the warehouse, completely solving the temperature stratification problem of conventional direct cooling systems and ensuring uniform temperature throughout the warehouse. Furthermore, the fully subcooled refrigerant has higher cooling efficiency after being throttled by the second throttling device 510, and the low-temperature gaseous refrigerant flows back through the second return port of the compressor 100, which is adapted to the low-temperature side suction requirements of the dual-suction compressor 100, ensuring the stable operation of the system under ultra-low temperature conditions. This achieves synergistic optimization of deep freezing, uniform temperature preservation, and energy efficiency, meeting the needs of frozen storage of goods.

[0044] It should be noted that the second evaporator coil 520 can be an air-cooled evaporator coil.

[0045] In one embodiment, such as Figure 1 As shown, the condensing heat exchange device includes a second condenser 620, which is provided with a first segmented channel and a second segmented channel for heat exchange. The throttling device includes a third throttling device 610, which is located at the inlet of the first segmented channel and connected to the first evaporation assembly 400. The outlet of the first segmented channel is connected to the return port of the compressor 100. The inlet of the second segmented channel is connected to the gas phase outlet and the outlet of the second segmented channel is connected to the second evaporation assembly 500.

[0046] Specifically, the liquid refrigerant separated by the component separator 300 is throttled by the first throttling device 410 of the first evaporation assembly 400. One path flows into the first evaporation coil 420 for basic insulation and heat exchange, while the other path merges into the third throttling device 610. After being throttled and depressurized by the third throttling device 610, it enters the first segmented channel of the single second condenser 620. Simultaneously, the gaseous refrigerant separated by the component separator 300 is discharged from the gas phase outlet and enters the second segmented channel of the second condenser 620. The refrigerant in the two segmented channels achieves efficient heat exchange through the pipe walls. The first segmented channel... After absorbing the heat from the gaseous refrigerant in the second segment channel, the refrigerant in the channel flows into the first return port of the compressor 100 from the channel outlet. The gaseous refrigerant in the second segment channel is cooled and condensed into a fully subcooled liquid refrigerant. After being discharged from the second segment channel, it enters the second throttle 510 of the second evaporation assembly 500. After being throttled and depressurized, it flows into the second evaporation coil 520 and exchanges heat with the goods in the compartment through forced convection. After completing the deep freezing and quick freezing, it is converted into a low-temperature gaseous refrigerant and flows back to the compressor 100 through the second return port of the compressor 100, forming a complete closed-loop cycle with the return gas on the direct cooling side.

[0047] It should be noted that the embodiments of this application adopt a design that integrates the first segmented channel and the second segmented channel with a single second condenser 620, which eliminates the need for multiple additional condensing devices, simplifies the system structure, reduces the difficulty of equipment integration and space occupation, and at the same time realizes close-range and efficient heat exchange between the direct cooling side split refrigerant and the gas phase refrigerant.

[0048] In one embodiment, such as Figure 2 As shown, the condensing heat exchange device includes multiple second condensers 620, each of which is provided with a first segmented channel and a second segmented channel for heat exchange. The throttling device includes multiple third throttling devices 610, with one third throttling device 610 corresponding to one second condenser 620. The multiple third throttling devices 610 and multiple first segmented channels are alternately connected. The inlet of the first third throttling device 610 is connected to the first evaporation assembly 400, and the outlet of the last first segmented channel is connected to the return gas port of the compressor 100. In addition, the multiple second segmented channels are connected in series. The inlet of the first second segmented channel is connected to the gas phase outlet, and the outlet of the last second segmented channel is connected to the second evaporation assembly 500.

[0049] Specifically, the liquid refrigerant separated by the component separator 300 is throttled by the first throttle 410 of the first evaporation assembly 400, and one of the channels is diverted to the third throttle 610 at the beginning. After being throttled and depressurized by the third throttle 610, it enters the first segmented channel of the corresponding second condenser 620. Then, according to the alternating connection logic of the third throttle 610 and the first segmented channel, it flows through all the third throttle 610 and the first segmented channel of the corresponding second condenser 620 in sequence, and finally merges into the first return port or the second return port of the compressor 100 from the outlet of the first segmented channel at the end.

[0050] Meanwhile, the gaseous refrigerant separated by the component separator 300 is discharged from the gas phase outlet and enters the second segment channel of the first-end second condenser 620. Since multiple second segment channels are designed in series, the gaseous refrigerant flows through all the second segment channels of the second condenser 620 in sequence. In each second segment channel, it exchanges heat with the refrigerant in the corresponding first segment channel through the pipe wall: the refrigerant in the first segment channel continuously absorbs the heat of the gaseous refrigerant in the second segment channel, realizing the full utilization of its own cooling capacity, while the gaseous refrigerant in the second segment channel is gradually cooled and condensed in the multi-stage continuous heat exchange, and finally forms a deeply subcooled liquid refrigerant. After being discharged from the outlet of the second segment channel at the end, it enters the second throttle 510 of the second evaporation component 500 for throttling and pressure reduction, and then flows through the second evaporation coil 520 to exchange heat with the goods in the compartment through forced convection. After completing the deep freezing and quick freezing, it is converted into a low-temperature gaseous refrigerant and flows back to the compressor 100 through the second return port.

[0051] It should be noted that, firstly, the embodiments of this application extend the heat exchange path of the refrigerant through multi-stage heat exchange, significantly improving the heat exchange sufficiency between the direct-cooling side refrigerant and the gaseous refrigerant. This allows the gaseous refrigerant to achieve deep subcooling, significantly enhancing the refrigeration efficiency and deep-freezing capability of the subsequent air-cooling side, effectively shortening the freezing time of goods and reducing the damage to the nutritional value of goods caused by the formation of large ice crystals. Secondly, compared to a single condenser, multi-stage heat exchange can more evenly distribute the heat exchange load, reducing the working pressure of individual components and extending the service life of the equipment.

[0052] In addition, it is understood that the first throttle 410, the second throttle 510 and the third throttle 610 mentioned above can be non-adjustable fixed throttles, such as capillary throttles, orifice plate throttles or other throttles; or they can be variable throttles that can adjust the throttle opening, such as electronic expansion valves, throttle valves or other valves.

[0053] In one embodiment, the refrigeration system further includes an anti-condensation pipe, the inlet of which is connected to the outlet of the first condenser 200, and the outlet of which is connected to the separator inlet of the component separator 300.

[0054] Specifically, the refrigeration system adds an anti-condensation pipe between the first condenser 200 and the component separator 300, wherein the anti-condensation pipe can be arranged at the door seal position of the cabinet 700.

[0055] It should be noted that, on the one hand, the door seal, as the connection point between the cabinet 700 and the outside world, is prone to condensation due to the temperature difference between the inside and outside. The high-temperature refrigerant flowing through the anti-condensation pipe at the condenser outlet releases residual heat, keeping the temperature of the door seal area stable above the air dew point. This effectively prevents condensation and icing on the door seal, thus preventing a decrease in the sealing performance of the door seal caused by condensation and preventing moisture damage to the appearance of the cabinet 700. This ensures the airtight insulation effect of the door seal on the cabinet 700 and reduces heat leakage into the environment. On the other hand, the anti-condensation pipe does not require an additional independent heating device. It directly utilizes the residual heat after the refrigerant condenses to achieve the anti-condensation function, avoiding additional energy waste.

[0056] like Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of the structure of a refrigeration system provided in one embodiment of this application; Figure 4 This is a structural cross-sectional view of a refrigeration system provided in one embodiment of this application.

[0057] In one embodiment, the refrigeration system includes an outer wall 710 and an inner liner 750, the inner liner 750 being located inside the outer wall 710, and a first evaporator coil 420 being located between the outer wall 710 and the inner liner 750 and being wound around the outer surface of the inner liner 750.

[0058] Specifically, the freezer body 700 adopts a layered structure design of outer wall 710, interlayer, and inner liner 750. The body 700 includes an outer wall 710 and an inner liner 750 located inside it. The first evaporator coil 420 is embedded in the interlayer space between the outer wall 710 and the inner liner 750 and is tightly wrapped to the outer surface of the inner liner 750.

[0059] It should be noted that, on the one hand, the first evaporator coil 420 is wound around the outer surface of the inner liner 750, which can efficiently transfer cold energy to the inner liner 750, reduce the loss in the cold energy transfer process, and at the same time allow the cold energy to evenly cover the entire wall of the inner liner 750. Together with the second evaporator coil 520 inside the box, it can achieve precise and uniform temperature distribution inside the box, avoiding the impact of local temperature differences on the quality of goods. On the other hand, the interlayer space is the insulation area of ​​the box body 700. When the first evaporator coil 420 is in this area, its temperature is between the ambient temperature and the box temperature, which can effectively offset the heat leakage from the external environment into the box, reduce the system cooling load, and further improve the operating efficiency. In addition, this embedded winding layout does not occupy the effective storage space inside the box, nor does it interfere with the forced heat exchange function of the second evaporator coil 520.

[0060] In one embodiment, the housing 700 further includes an outer insulation layer 720, which is located between the outer wall 710 and the first evaporation coil 420.

[0061] In one embodiment, the housing 700 further includes an inner insulation layer 740, which is located between the first evaporator coil 420 and the inner liner 750.

[0062] Specifically, the outer insulation layer 720 is tightly filled between the outer wall 710 and the first evaporator coil 420, while the inner insulation layer 740 is fitted between the first evaporator coil 420 and the inner liner 750. The first evaporator coil 420 is fixed to the outer surface of the inner insulation layer 740 by winding. The double insulation layers form a wrap-around protection for the first evaporator coil 420 from the angles of outer enclosure and inner fitting.

[0063] It should be noted that, through the above structural design, on the one hand, the outer insulation layer 720 can effectively block the penetration of external environmental heat into the interlayer space, while the inner insulation layer 740 reduces the loss of cold energy from the inner liner 750 to the outside of the first evaporator coil 420. The double insulation layer forms a two-way heat insulation barrier, which greatly reduces environmental heat leakage and internal cold energy loss. On the other hand, the double insulation layer can weaken the impact of external temperature fluctuations on the first evaporator coil 420 and avoid fluctuations in heat transfer efficiency caused by environmental temperature changes.

[0064] In one embodiment, the housing 700 further includes a temperature equalization plate 730, which is located between the first evaporation coil 420 and the inner liner 750.

[0065] Specifically, a temperature equalization plate 730 is added between the first evaporator coil 420 and the inner insulation layer 740 in the freezer body 700, forming an optimized hierarchical structure of outer wall 710, outer insulation layer 720, first evaporator coil 420, temperature equalization plate 730, inner insulation layer 740, and inner liner 750. The temperature equalization plate 730 is closely attached to the outer surface of the inner insulation layer 740, and the first evaporator coil 420 is wrapped around the outside of the temperature equalization plate 730. The temperature equalization plate 730 forms a bridge for uniform heat conduction, making the heat exchange between the first evaporator coil 420 and the inner liner 750 more efficient and balanced.

[0066] It should be noted that, through the above structural design, on the one hand, the temperature uniform plate 730, with its efficient heat conduction characteristics, can quickly receive the cold energy transferred by the first evaporator coil 420 and evenly diffuse it to the entire outer surface of the inner liner 750, completely eliminating the phenomenon of local cold energy concentration or insufficient cold energy in the inner liner 750, making the temperature field distribution inside the compartment more balanced, and avoiding uneven quality of goods due to local temperature differences; on the other hand, the presence of the temperature uniform plate 730 increases the contact area for cold energy transfer, reduces the thermal resistance between the first evaporator coil 420 and the inner liner 750, allowing the cold energy of the first evaporator coil 420 to be transferred to the compartment more quickly and directly, and, together with the forced heat exchange of the second evaporator coil 520, further improves the freezing speed and cold preservation efficiency; at the same time, the uniform cold energy distribution can avoid the risk of frost formation caused by excessively low local temperatures in the inner liner 750, and help enhance the frost-free effect of the inner wall.

[0067] Based on the hardware structure of the refrigeration system in the above embodiments, the following presents various embodiments of the control method of the refrigeration system of this application.

[0068] like Figure 5 As shown, Figure 5 This is a flowchart of a control method for a refrigeration system provided in one embodiment of this application; the control method for the refrigeration system may include, but is not limited to, steps S510, S520 and S530.

[0069] Step S510: Obtain the operating status parameters of the refrigeration system; Step S520: Determine the target operating mode of the refrigeration system based on the operating status parameters; Step S530: Control the refrigeration system to operate in the target working mode.

[0070] In one embodiment, firstly, the refrigeration system collects the operating status parameters of the refrigeration system in real time. Then, the system analyzes the collected operating status parameters according to the preset operating condition judgment rules to determine the target operating mode required by the refrigeration system. Finally, the system outputs control commands according to the determined target operating mode to regulate the coordinated operation of the various components of the system.

[0071] It should be noted that the refrigeration system in this embodiment achieves gas-liquid separation of the mixed refrigerant through a component separator. Combined with the coordinated work of the first evaporation component and the second evaporation component, and with the heat exchange and throttling optimization of the condensing heat exchange device and the throttling device, it can effectively solve the problems of low refrigeration efficiency and uneven temperature stratification in conventional refrigeration systems. Specifically, firstly, the separated liquid refrigerant enters the first evaporation component for throttling and medium-temperature evaporation, which offsets external heat infiltration and ensures a basic insulation environment inside the freezer. Meanwhile, the gaseous refrigerant flows through the second channel of the condensation heat exchanger, exchanging heat with the refrigerant that has been throttled and flows into the first channel, thus condensing into a liquid and undergoing sufficient subcooling. It then enters the second evaporation component for throttling and ultra-low temperature refrigeration. Forced convection significantly improves the heat transfer coefficient with the goods, greatly enhancing refrigeration efficiency and freezing speed, reducing the formation of large ice crystals, and lowering the risk of nutritional damage to the goods. Furthermore, the forced convection characteristics of the second evaporation component, combined with the basic insulation of the first evaporation component, effectively eliminate the temperature stratification problem of conventional direct cooling modes, ensuring uniform temperature throughout the freezer. This balances deep freezing and uniform temperature preservation, meeting the freezing needs of goods and improving the user experience.

[0072] like Figure 6 As shown, Figure 6 This is a flowchart illustrating a control method for a refrigeration system when the compartment temperature is greater than or equal to a preset temperature, according to an embodiment of this application. The control method for this refrigeration system may include, but is not limited to, steps S610, S620, and S630.

[0073] Step S610: Obtain the operating status parameters of the refrigeration system, wherein the operating status parameters include the compartment temperature; Step S620: When the temperature of the compartment is greater than or equal to the preset temperature, the target operating mode of the refrigeration system is determined to be the refrigeration mode; Step S630: Control the refrigeration system to operate in refrigeration mode.

[0074] In one embodiment, firstly, the refrigeration system collects operating status parameters of the refrigeration system in real time, such as the compartment temperature. Then, the system compares the collected compartment temperature with a preset temperature threshold. When the compartment temperature is greater than or equal to the preset temperature, the system determines that the target operating mode of the refrigeration system is the refrigeration mode. Finally, the refrigeration system drives the compressor to start. At the same time, all refrigeration components, such as the condenser, various throttling devices, and evaporation components, work together to start a complete refrigeration cycle until the compartment temperature drops below the preset temperature.

[0075] Alternatively, step S620 can also be: when the temperature of the compartment is greater than or equal to the preset temperature and continues for a first preset duration, the target operating mode of the refrigeration system is determined to be the refrigeration mode.

[0076] like Figure 7 As shown, Figure 7 This is a flowchart of a control method for a refrigeration system provided in one embodiment of this application when the compartment temperature is lower than a preset temperature and the defrosting time interval reaches a preset defrosting time. The control method for this refrigeration system may include, but is not limited to, steps S710, S720, and S730.

[0077] Step S710: Obtain the operating status parameters of the refrigeration system, wherein the operating status parameters include the compartment temperature and the defrosting time interval of the second evaporation component; Step S720: When the temperature of the compartment is lower than the preset temperature and the defrosting time interval reaches the preset defrosting time, the target working mode of the refrigeration system is determined to be the defrosting mode. Step S730: Control the refrigeration system to operate in defrost mode.

[0078] In one embodiment, firstly, the refrigeration system collects the operating status parameters of the refrigeration system in real time, such as the compartment temperature and the defrosting time interval of the second evaporation component. Then, when it is detected that the compartment temperature has dropped below the preset temperature and the defrosting time interval of the second evaporation component has reached the preset defrosting time, the target operating mode of the refrigeration system is determined to be the defrosting mode. Finally, the condenser, evaporator and other components stop operating, and the defrosting heater for defrosting the second evaporation component, such as the heating wire set on the surface of the second evaporation coil, is turned on.

[0079] Alternatively, step S720 above can also be: when the compartment temperature does not remain greater than or equal to the preset temperature for a first preset duration, the target operating mode of the refrigeration system is determined to be the defrosting mode.

[0080] Based on the control methods of the refrigeration system in the above embodiments, the overall embodiments of the control methods of the refrigeration system of this application are presented below.

[0081] This application embodiment constructs a self-cascade refrigeration system based on a high-efficiency dual-suction compressor that couples air cooling and direct cooling. By utilizing the different boiling points of different refrigerants, a stepped evaporation temperature is achieved. Within the same system, air cooling for quick freezing and direct cooling for heat preservation are realized, achieving multiple effects such as deep cooling, quick freezing, uniform temperature, and energy saving.

[0082] like Figure 1 and Figure 2As shown, when the refrigeration system is running, all components of the refrigeration system are working. The mixed refrigerant first passes through the compressor, then through the first condenser (such as an air-cooled condenser), and the anti-condensation pipe before entering the component separator. The refrigerant is separated, with the low-boiling-point refrigerant remaining in a gaseous state and the high-boiling-point refrigerant in a liquid state. After being throttled by the first expansion valve, a portion of the liquid refrigerant enters the first evaporator coil, which is the coil surrounding the casing, for medium-temperature evaporation. Its main function is to offset the heat that seeps in from the outside. A small portion of the refrigerant is throttled a second time by the third expansion valve and enters the second condenser (such as an evaporator-condenser) to exchange heat with the gaseous refrigerant coming out of the component separator, cooling the gaseous refrigerant to liquid. This allows it to be subcooled as much as possible before entering the second expansion valve. The refrigerant that has been throttled a second time from the second condenser merges with the refrigerant at the outlet of the first evaporator coil and enters the compressor's medium-temperature side suction port, i.e., the first return port. The refrigerant throttled by the second throttling device enters the second evaporator coil for cryogenic and ultra-low temperature freezing of goods. Because forced convection enhances the heat transfer coefficient between the refrigerant and the cargo surface, the second evaporator coil allows for faster freezing and more uniform temperature distribution within the cargo compartment. The refrigerant exiting the second evaporator coil enters the compressor's low-temperature suction port, also known as the second return port.

[0083] In addition, such as Figure 8 As shown, Figure 8 This is an overall flowchart of a control method for a refrigeration system provided in one embodiment of this application. The control method for the refrigeration system may include, but is not limited to, steps S810 to S860.

[0084] Step S810: Begin; Step S820: Determine whether the chamber temperature is greater than or equal to Tset and has lasted for more than 5 minutes. If yes, proceed to step S830; otherwise, proceed to step S840. Step S830: Execute cooling mode; Step S840: Determine whether the defrosting time interval of the air-cooled evaporator coil meets the preset defrosting time. If yes, proceed to step S850; otherwise, proceed to step S860. Step S850: Execute the defrosting mode for the air-cooled evaporator coil; Step S860, End.

[0085] Specifically, the refrigeration system mainly has a refrigeration mode and an air-cooled evaporator defrosting mode. When the compartment temperature meets the conditions for the refrigeration mode, it enters the refrigeration mode: the compressor drives the system to refrigerate, and all refrigeration system components operate until the temperature meets the set value; when the system determines that the conditions for the defrosting mode are met, it enters the second evaporator coil defrosting mode: the refrigeration system stops, the damper closes, the defrosting heater works, and after defrosting is completed, the system operation mode is re-determined.

[0086] This refrigeration system can achieve ultra-low temperature refrigeration (down to -80°C) by using refrigerants of different components, thereby achieving the purpose of rapid freezing of goods.

[0087] The control method of the refrigeration system based on the above embodiments has the following technical effects: 1. It accelerates the heat exchange efficiency of the cargo surface by air cooling, thereby achieving a leap in freezing rate; 2. It improves energy efficiency by using medium-temperature energy to block heat leakage from the environment; 3. It makes the temperature inside the warehouse uniform by air cooling heat exchange.

[0088] Based on the control methods of the refrigeration system in the above embodiments, the following presents various embodiments of the controller, refrigeration system, computer-readable storage medium, and computer program product of this application.

[0089] like Figure 9 As shown, Figure 9 This is a schematic diagram of a controller for executing a control method for a refrigeration system according to an embodiment of this application. The controller 800 implemented in this application includes: a processor 810, a memory 820, and a computer program stored in the memory 820 and executable on the processor 810, wherein... Figure 9 The example uses a processor 810 and a memory 820.

[0090] The processor 810 and memory 820 can be connected via a bus or other means. Figure 9 Taking the example of a connection between China and Israel via a bus.

[0091] Memory 820, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory 820 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 820 may optionally include remotely located memories 820 relative to processor 810, which can be connected to controller 800 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0092] Those skilled in the art will understand that Figure 9 The device structure shown does not constitute a limitation on the controller 800 and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0093] exist Figure 9In the controller 800 shown, the processor 810 can be used to call the control program stored in the memory 820, thereby implementing the control method of the refrigeration system described above. Specifically, the non-transitory software program and instructions required to implement the control method of the refrigeration system in the above embodiment are stored in the memory 820. When executed by the processor 810, the control method of the refrigeration system in the above embodiment is executed.

[0094] It is worth noting that, since the controller 800 of this application embodiment can execute the control method of the refrigeration system of any of the above embodiments, the specific implementation method and technical effect of the controller 800 of this application embodiment can refer to the specific implementation method and technical effect of the control method of the refrigeration system of any of the above embodiments.

[0095] Furthermore, one embodiment of this application also provides a refrigeration system, which includes the controller described in the above embodiment.

[0096] It is worth noting that, since the refrigeration system of this application embodiment includes the controller of the above embodiment, and the controller of the above embodiment can execute the control method of the refrigeration system of any of the above embodiments, the specific implementation method and technical effect of the refrigeration system of this application embodiment can refer to the specific implementation method and technical effect of the control method of the refrigeration system of any of the above embodiments.

[0097] Furthermore, one embodiment of this application provides a computer-readable storage medium storing computer-executable instructions for performing the aforementioned control method for a refrigeration system. Exemplarily, the above-described method is executed... Figures 5 to 8 The methods and steps in the text.

[0098] It is worth noting that, since the computer-readable storage medium of this application embodiment can execute the control method of the refrigeration system of any of the above embodiments, the specific implementation and technical effects of the computer-readable storage medium of this application embodiment can be referred to the specific implementation and technical effects of the control method of the refrigeration system of any of the above embodiments.

[0099] Furthermore, one embodiment of this application also provides a computer program product, including a computer program or computer instructions, which are stored in a computer-readable storage medium. A processor of a computer device reads the computer program or computer instructions from the computer-readable storage medium and executes the computer program or computer instructions, causing the computer device to perform the aforementioned control method for the cooling system. Exemplarily, the above-described method is performed... Figures 5 to 8 The methods and steps in the text.

[0100] It is worth noting that, since the computer program product of this application embodiment can execute the control method of the refrigeration system of any of the above embodiments, the specific implementation method and technical effect of the computer program product of this application embodiment can refer to the specific implementation method and technical effect of the control method of the refrigeration system of any of the above embodiments.

[0101] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0102] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0103] In the several embodiments provided in this application, it should be understood that the disclosed systems, instruments, and methods can be implemented in other ways. For example, the instrument embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between instruments or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0104] It should also be understood that the various implementation methods provided in this application can be combined arbitrarily to achieve different technical effects.

[0105] The above provides a detailed description of the preferred embodiments of this application. However, this application is not limited to the above-described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A refrigeration system characterized by, The refrigeration system comprises: a compressor, a first condenser, a first evaporation assembly and a second evaporation assembly; a component separator, which is provided with a separator inlet, a liquid phase outlet and a gas phase outlet, the separator inlet is communicated to the exhaust port of the compressor through the first condenser, the liquid phase outlet is communicated to the return air port of the compressor through the first evaporation assembly; a condensing heat exchange device and a throttling device, the condensing heat exchange device is provided with a first channel and a second channel for heat exchange, the first evaporation assembly is further communicated to the return air port of the compressor through the throttling device and the first channel, and the gas phase outlet of the component separator is communicated to the return air port of the compressor through the second channel and the second evaporation assembly.

2. The refrigeration system of claim 1, wherein The first evaporation assembly comprises a first throttling device and a first evaporation coil, the inlet of the first throttling device is communicated to the liquid phase outlet, and the outlet of the first throttling device is communicated to the first return air port of the compressor through the first evaporation coil.

3. The refrigeration system of claim 2, wherein, The outlet of the first throttling device is further communicated to the first return air port of the compressor through the throttling device and the first channel.

4. The refrigeration system of claim 1 wherein, The second evaporation assembly comprises a second throttling device and a second evaporation coil, the inlet of the second throttling device is communicated to the outlet of the second channel, and the outlet of the second throttling device is communicated to the second return air port of the compressor through the second evaporation coil.

5. The refrigeration system of claim 1 wherein, The condensing heat exchange device comprises a second condenser, the second condenser is provided with a first segmented channel and a second segmented channel for heat exchange, the throttling device comprises a third throttling device, the third throttling device is arranged at the inlet of the first segmented channel, the inlet of the third throttling device is communicated to the first evaporation assembly, the outlet of the first segmented channel is communicated to the return air port of the compressor, the inlet of the second segmented channel is communicated to the gas phase outlet, and the outlet of the second segmented channel is communicated to the second evaporation assembly.

6. The refrigeration system of claim 1 wherein, The condensing heat exchange device comprises a plurality of second condensers, each second condenser is provided with a first segmented channel and a second segmented channel for heat exchange, the throttling device comprises a plurality of third throttling devices, one second condenser corresponds to one third throttling device; wherein, the plurality of third throttling devices and the plurality of first segmented channels are alternately communicated, the inlet of the third throttling device at the head is communicated to the first evaporation assembly, and the outlet of the first segmented channel at the tail is communicated to the return air port of the compressor; in addition, the plurality of second segmented channels are connected in series, the inlet of the second segmented channel at the head is communicated to the gas phase outlet, and the outlet of the second segmented channel at the tail is communicated to the second evaporation assembly.

7. The refrigeration system of claim 2 wherein, The refrigeration system comprises an outer wall and an inner container, the inner container is located in the inner part of the outer wall, the first evaporation coil is located between the outer wall and the inner container and is wound on the outer surface of the inner container.

8. The refrigeration system of claim 7, wherein The refrigeration system further comprises at least one of the following: an outer thermal insulation layer, which is located between the outer wall and the first evaporation coil; an inner thermal insulation layer, which is located between the first evaporation coil and the inner container; a uniform temperature plate, which is located between the first evaporation coil and the inner container.

9. The refrigeration system according to any one of claims 1 to 8, characterized in that The first evaporation assembly is a direct cooling evaporation assembly, and the second evaporation assembly is an air cooling evaporation assembly.

10. A control method of a refrigeration system, characterized by, The method applied to the refrigeration system of any one of claims 1 to 9, the method comprises: obtaining the operating state parameters of the refrigeration system; determining the target working mode of the refrigeration system according to the operating state parameters; controlling the refrigeration system to work in the target working mode.

11. The method according to claim 10, characterized in that, The target operating mode of the refrigeration system is determined based on the operating status parameters, including at least one of the following: When the operating status parameters include the compartment temperature, if the compartment temperature is greater than or equal to the preset temperature, the target operating mode of the refrigeration system is determined to be the refrigeration mode. When the operating status parameters include the compartment temperature and the defrosting time interval of the second evaporator, if the compartment temperature is lower than the preset temperature and the defrosting time interval reaches the preset defrosting time, the target operating mode of the refrigeration system is determined to be the defrosting mode.

12. The method according to claim 11, characterized in that, Control the refrigeration system to operate in a target operating mode, including one of the following: When the target operating mode is cooling mode, turn on the compressor; When the target operating mode is defrosting mode, the compressor is turned off and the defrosting heater for defrosting the second evaporator is turned on.

13. A controller characterized by comprising: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes a control method for a refrigeration system as described in any one of claims 10 to 12 when executing the computer program.

14. A computer-readable storage medium, characterized in that: The system stores computer-executable instructions for performing a control method for a refrigeration system as described in any one of claims 10 to 12.

15. A computer program product comprising computer programs or computer instructions, characterized in that, The computer program or computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer program or computer instructions from the computer-readable storage medium and executes the computer program or computer instructions, causing the computer device to perform the control method of the refrigeration system as described in any one of claims 10 to 12.

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