Refrigeration system and method of controlling the same, controller, storage medium, and program product

Abstract

Embodiments of the present application provide a refrigeration system and a control method, a controller, a storage medium and a program product thereof, which comprise a compressor, a condenser, an evaporator, a heat exchange relay and a valve assembly. The heat exchange relay comprises a first coil pipe, a second coil pipe and a third coil pipe, which are arranged side by side and wound on a box. The valve assembly is provided with a valve inlet, a first valve outlet and a second valve outlet. The outlet of the condenser is connected to the valve inlet through the first coil pipe. The first valve outlet is connected to the gas return port of the compressor through the second coil pipe. The second valve outlet is connected to the gas return port of the compressor through the evaporator and the third coil pipe in sequence. The embodiments of the present application construct a multi-mode adjustable refrigeration system based on a double-suction compressor, which can realize multi-mode operation mechanisms such as air-cooled quick freezing, direct-cooled heat preservation, inner wall frost prevention and frost removal without stopping, and achieve multiple effects such as deep cooling, quick freezing, uniform temperature and energy saving.

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 problems such as insufficient freezing capacity, slow freezing speed, large temperature fluctuations during defrosting, and high energy consumption 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 their nutritional value and thus affecting user experience. Specifically, conventional refrigeration systems typically have the following drawbacks: First, insufficient freezing speed, resulting in large ice crystals that easily damage the nutritional value of goods during freezing; second, moisture in the air condenses into frost inside the storage compartment, requiring manual or mechanical defrosting, leading to large temperature fluctuations and affecting the quality of goods; third, high operating energy consumption, impacting the user experience. 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 slow freezing speed, large defrosting temperature fluctuations, and high energy consumption in refrigeration systems.

[0004] In a first aspect, embodiments of this application provide a refrigeration system, including:

[0005] The compressor, condenser, evaporator, and housing are provided, wherein the exhaust port of the compressor is connected to the inlet of the condenser, and the evaporator is installed in the housing.

[0006] A heat exchange relay includes a first coil, a second coil, and a third coil, wherein the first coil, the second coil, and the third coil are wound around the housing;

[0007] The valve assembly is provided with a valve inlet, a first valve outlet, and a second valve outlet. The outlet of the condenser is connected to the valve inlet through the first coil, the first valve outlet is connected to the return port of the compressor through the second coil, and the second valve outlet is connected to the return port of the compressor through the evaporator and the third coil in sequence.

[0008] According to some embodiments of this application, the first coil, the second coil, and the third coil are arranged side by side in the height direction of the housing.

[0009] According to some embodiments of this application, the first coil is located between the second coil and the third coil, and the second coil abuts against a first side of the first coil, and the third coil abuts against a second side of the first coil.

[0010] According to some embodiments of this application, the refrigerant flow direction of the first coil is opposite to that of the second coil, and / or the refrigerant flow direction of the first coil is opposite to that of the third coil.

[0011] According to some embodiments of this application, the valve assembly includes a regulating valve, a first throttling device, and a second throttling device. The inlet of the regulating valve is connected to the outlet of the condenser, one outlet of the regulating valve is connected to the second coil through the first throttling device, and the other outlet of the regulating valve is connected to the evaporator through the second throttling device.

[0012] According to some embodiments of this application, the outlet of the second coil is connected to the first return port of the compressor, and the outlet of the third coil is connected to the second return port of the compressor, wherein a switching valve is provided between the first return port and the second return port.

[0013] According to some embodiments of this application, the refrigeration system further includes at least one of the following:

[0014] A liquid storage tank, the inlet of which is connected to the outlet of the second coil, and the outlet of which is connected to the return port of the compressor;

[0015] An anti-condensation pipe, the inlet of which is connected to the outlet of the condenser, and the outlet of which is connected to the inlet of the first coil.

[0016] According to some embodiments of this application, the housing includes an outer wall and an inner liner, the inner liner being located inside the outer wall, and the heat exchange relay being located between the outer wall and the inner liner and wrapped around the outer surface of the inner liner.

[0017] According to some embodiments of this application, the housing further includes at least one of the following:

[0018] An external insulation layer is located between the outer wall and the heat exchange relay.

[0019] An inner insulation layer is located between the heat exchange relay and the inner liner;

[0020] A temperature equalization plate is located between the heat exchange relay and the inner liner.

[0021] 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:

[0022] Obtain the chamber temperature of the box;

[0023] The target operating mode of the refrigeration system is determined based on the temperature of the compartment.

[0024] Control the refrigeration system to operate in the target operating mode.

[0025] According to some embodiments of this application, determining the target operating mode of the refrigeration system based on the compartment temperature includes at least one of the following:

[0026] When the temperature of the compartment is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, the target operating mode of the refrigeration system is determined to be the heat preservation mode, wherein the second preset temperature is greater than the first preset temperature;

[0027] When the temperature of the compartment is greater than the second preset temperature, the target operating mode of the refrigeration system is determined to be the freezing mode.

[0028] When the temperature of the compartment is lower than the first preset temperature, the freezer status parameters of the refrigeration system are obtained, and the target working mode of the refrigeration system is determined to be either freezing mode or defrosting mode based on the freezer status parameters.

[0029] According to some embodiments of this application, determining the target operating mode of the refrigeration system as either freezing mode or defrosting mode based on the freezer status parameters includes one of the following:

[0030] When the freezer status parameters include the number of times the compartment door is opened and the rate of temperature rise in the compartment, if the number of times the compartment door is opened is greater than or equal to a preset number and the rate of temperature rise in the compartment is greater than or equal to a preset rate, the target operating mode of the refrigeration system is determined to be the freezing mode.

[0031] When the refrigerator status parameters include the defrosting time interval of the evaporator, 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.

[0032] According to some embodiments of this application, the method further includes at least one of the following:

[0033] When the freezing mode is executed, if the temperature of the compartment is less than or equal to a third preset temperature, the refrigeration system is controlled to switch from the freezing mode to the heat preservation mode.

[0034] When the insulation mode is executed, if the temperature of the compartment is less than or equal to a third preset temperature, the refrigeration system is controlled to stop executing the insulation mode.

[0035] According to some embodiments of this application, controlling the refrigeration system to operate in the target operating mode includes one of the following:

[0036] When the target working mode is the heat preservation mode, the compressor is turned on, the valve inlet of the valve assembly is connected to the first valve outlet, and the fan corresponding to the evaporator is turned off;

[0037] When the target operating mode is the freezing mode, the compressor is turned on, the valve inlet of the valve assembly is connected to the first valve outlet and the second valve outlet, and the fan corresponding to the evaporator is turned on;

[0038] When the target operating mode is defrosting mode, the valve inlet of the valve assembly is connected to the first valve outlet, the fan corresponding to the evaporator is turned off, the defrosting heater for defrosting the evaporator is turned on, and the operating speed of the compressor is increased.

[0039] 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, wherein the processor executes the control method of the refrigeration system described in the second aspect when running the computer program.

[0040] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions for performing a control method for a refrigeration system as described in the second aspect above.

[0041] 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, a 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.

[0042] According to the technical solution of the embodiments of this application, at least the following beneficial effects are achieved: First, the embodiments of this application, through the series design of the evaporator and the third coil, combined with the low-temperature flow path supply of refrigerant through the outlet of the second valve, can improve the heat exchange efficiency of the air inside the cabinet, quickly reduce the temperature of the goods, effectively reduce the formation of large ice crystals during freezing, avoid damage to the cell structure of high-end goods, and retain their nutritional components to the greatest extent; Second, the embodiments of this application, through the structure of the first coil, the second coil, and the third coil of the heat exchange relay, enable the high-temperature refrigerant at the outlet of the condenser to efficiently transfer heat with the second coil and the third coil when it flows through the first coil, wherein the second coil corresponds to The medium-temperature refrigerant flow path can fully utilize the medium-temperature cooling capacity to block heat leakage from the environment to the cabinet, replacing the traditional low-temperature cooling capacity for cold preservation, and significantly reducing the operating energy consumption of the refrigeration system. In addition, the embodiments of this application combine the air-cooling method of the evaporator with the coil direct cooling method of the heat exchange relay, which can quickly remove moisture from the air inside the cabinet during operation, reduce frost formation inside the cabinet, and eliminate the need for manual or mechanical defrosting. Furthermore, the valve assembly can flexibly control the two refrigerant flow paths, suppressing temperature fluctuations while ensuring continuous refrigeration, ensuring a constant internal temperature of the cabinet, and preventing quality damage to goods due to temperature changes during defrosting. This can meet the frozen storage needs of high-end goods, thereby improving the user experience.

[0043] 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

[0044] 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.

[0045] Figure 1 This is a schematic diagram of a refrigeration system provided in one embodiment of this application;

[0046] Figure 2 This is a schematic diagram of the structure of a refrigeration system provided in one embodiment of this application;

[0047] Figure 3 This is a schematic diagram of the coil arrangement of a heat exchange relay in a refrigeration system provided in one embodiment of this application;

[0048] Figure 4 This is a schematic diagram of the refrigerant flow direction of the first coil in a heat exchanger relay provided in one embodiment of this application;

[0049] Figure 5 This is a schematic diagram of the refrigerant flow direction of the second coil in a heat exchanger relay provided in one embodiment of this application;

[0050] Figure 6 This is a schematic diagram of the refrigerant flow direction in the third coil of a heat exchanger relay provided in one embodiment of this application;

[0051] Figure 7 This is a structural cross-sectional view of a refrigeration system provided in one embodiment of this application;

[0052] Figure 8 This is a flowchart of a control method for a refrigeration system provided in one embodiment of this application;

[0053] Figure 9 This is a flowchart of a control method for a refrigeration system provided in one embodiment of this application when the compartment temperature is between a first preset temperature and a second preset temperature;

[0054] Figure 10 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 second preset temperature, according to an embodiment of this application.

[0055] Figure 11 This is a flowchart of a control method for a refrigeration system when the temperature in the compartment is lower than a first preset temperature, according to an embodiment of this application.

[0056] Figure 12 yes Figure 11 A flowchart of a sub-step of one embodiment of step S1120;

[0057] Figure 13 yes Figure 11 A flowchart of a sub-step of another embodiment of step S1120;

[0058] Figure 14 This is an overall flowchart of a control method for a refrigeration system provided in one embodiment of this application;

[0059] Figure 15 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

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] In some situations, conventional refrigeration systems often encounter problems when freezing goods, such as insufficient freezing capacity, slow freezing speed, large temperature fluctuations during defrosting, and high energy consumption. In particular, the freezing performance of conventional refrigeration systems cannot meet the freezing requirements of high-end goods, resulting in significant damage to their nutritional value and thus affecting user experience. Specifically, conventional refrigeration systems typically have the following disadvantages: First, insufficient freezing speed, resulting in large ice crystals that easily damage the nutritional value of goods during freezing; second, moisture in the air condenses into frost inside the storage compartment, requiring manual or mechanical defrosting, leading to large temperature fluctuations and affecting the quality of goods; third, high operating energy consumption, impacting the user experience.

[0065] Based on the above, this application proposes a refrigeration system and its control method, controller, storage medium and program product, aiming to solve the problems of slow freezing speed, large defrosting temperature fluctuation and high energy consumption in refrigeration systems.

[0066] The various embodiments of the refrigeration system of this application will be further described below with reference to the accompanying drawings.

[0067] like Figures 1 to 3 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 the structure of a refrigeration system provided in one embodiment of this application; Figure 3 This is a schematic diagram of the coil arrangement of a heat exchange relay in a refrigeration system provided in one embodiment of this application.

[0068] In one embodiment, the refrigeration system includes, but is not limited to, a housing 900, a compressor 100, a condenser 200, an evaporator 600, a heat exchange relay 400, and a valve assembly 500. The exhaust port of the compressor 100 is connected to the inlet of the condenser 200, and the evaporator 600 is installed in the housing 900. The heat exchange relay 400 includes a first coil 410, a second coil 420, and a third coil 430, which are wound around the housing 900. The valve assembly 500 has a valve inlet, a first valve outlet, and a second valve outlet. The outlet of the condenser 200 is connected to the valve inlet via the first coil 410, the first valve outlet is connected to the return port of the compressor 100 via the second coil 420, and the second valve outlet is connected to the return port of the compressor 100 via the evaporator 600 and the third coil 430, respectively.

[0069] Specifically, the refrigeration system of this application embodiment uses the housing 900 as the supporting component, and is equipped with a compressor 100, a condenser 200, an evaporator 600, a heat exchange relay 400 and a valve assembly 500 to form a complete refrigeration architecture. Each component is precisely connected through pipelines to form a closed-loop flow path. The evaporator 600 is directly installed inside the compartment of the housing 900 to ensure heat exchange. In addition, the first coil 410, the second coil 420 and the third coil 430 of the heat exchange relay 400 are tightly wound around the outside of the compartment of the housing 900. In addition, the valve assembly 500 has one valve inlet and two valve outlets to realize the diversion and control of refrigerant.

[0070] In addition, the flow path of the refrigeration system can be as follows: the high-temperature and high-pressure refrigerant discharged from the exhaust port of the compressor 100 first enters the inlet of the condenser 200, and after condensation, it flows out from the outlet of the condenser 200. Then it flows through the first coil 410 wrapped around the housing 900, and then flows into the valve inlet of the valve assembly 500. The refrigerant entering the valve assembly 500 is divided into two paths here. One path flows out from the outlet of the first valve and directly connects to the return port of the compressor 100 through the second coil 420 wrapped around the housing 900. The other path flows out from the outlet of the second valve, first flows through the evaporator 600 in the housing 900 to complete heat exchange, and then flows through the third coil 430 wrapped around the housing 900, and finally flows into the return port of the compressor 100, forming a closed-loop refrigeration flow path with single compressor 100 output and dual coil return.

[0071] In one embodiment, the first coil 410, the second coil 420 and the third coil 430 are arranged side by side in the height direction of the housing 900.

[0072] It should be noted that, firstly, this embodiment of the application, through the series design of the evaporator 600 and the third coil 430, combined with the low-temperature flow path supply of refrigerant through the outlet of the second valve, can improve the heat exchange efficiency of the air inside the cabinet 900, quickly reduce the temperature of the goods, effectively reduce the formation of large ice crystals during freezing, avoid damage to the cell structure of high-end goods, and retain their nutritional components to the greatest extent; secondly, this embodiment of the application, through the parallel winding structure of the first coil 410, the second coil 420, and the third coil 430 of the heat exchange relay 400, allows the high-temperature refrigerant flowing through the outlet of the condenser 200 to efficiently transfer heat with the second coil 420 and the third coil 430 when it flows through the first coil 410, where the second coil 420 corresponds to... The medium-temperature refrigerant flow path can fully utilize the medium-temperature cold energy to block heat leakage from the environment to the cabinet 900, replacing the traditional low-temperature cold energy preservation, which greatly improves the operating efficiency of the refrigeration system and ultimately reduces energy consumption. In addition, the embodiment of this application combines the air-cooling method of the evaporator 600 with the coil direct cooling method of the heat exchange relay 400. This can quickly remove moisture from the air inside the cabinet during operation, reduce frost formation inside the cabinet, and eliminate the need for manual or mechanical defrosting. Furthermore, the valve assembly 500 can flexibly control the two refrigerant flow paths, suppressing temperature fluctuations while ensuring continuous refrigeration. This ensures a constant internal temperature of the cabinet 900 and prevents quality damage to goods due to temperature changes during defrosting. This meets the frozen storage needs of high-end goods and improves the user experience.

[0073] It should be noted that the evaporator 600 mentioned above can specifically be an air-cooled evaporator.

[0074] In one embodiment, such as Figure 3 As shown, the first coil 410 is located between the second coil 420 and the third coil 430, and the second coil 420 abuts against the first side of the first coil 410, while the third coil 430 abuts against the second side of the first coil 410.

[0075] Specifically, the heat exchange relay 400 of this refrigeration system adopts a compact coil layout with a central clamp and double-sided contact. The first coil 410, serving as the core heat exchange intermediary, is centrally located. The second coil 420 is tightly abutted against the first side of the first coil 410, and the third coil 430 is tightly abutted against the second side of the first coil 410. These three coils form a sandwich-like fit structure, and are simultaneously wrapped around the outside of the housing 900, ensuring no significant gaps between the coils and minimal thermal resistance. Simultaneously, heat exchange between them can also be enhanced by methods such as attaching aluminum foil.

[0076] It should be noted that the above structural design maximizes the heat transfer efficiency between the three coils: on the one hand, the high-temperature refrigerant flowing from the condenser 200 and through the first coil 410 can quickly transfer heat to the second coil 420 and the third coil 430 on both sides through direct contact on both sides. This not only promotes sufficient subcooling of the refrigerant in the first coil 410, improving the overall cooling capacity of the system, but also allows the return refrigerant in the second coil 420 and the third coil 430 to absorb heat and rise in temperature in advance to achieve superheating, avoiding liquid slugging of the compressor 100 and ensuring... The system ensures stable operation; on the other hand, the tightly fitted layout shortens the heat transfer path, allowing the cooling capacity of the medium-temperature flow path, i.e., the second coil 420, to efficiently assist the low-temperature flow path, i.e., the third coil 430, further optimizing the cooling capacity distribution, improving energy efficiency, and reducing the impact of environmental heat leakage; in addition, this integrated, wrapped, fitted structure allows the cooling capacity to be transferred more evenly to the cabinet 900, which, together with the evaporator 600 inside the cabinet 900, further suppresses temperature fluctuations inside the cabinet, helping to achieve functions such as frost-free inner walls and rapid freezing, and comprehensively ensuring the storage quality of high-end goods.

[0077] It is understood that the arrangement order of the three coils in the heat exchanger repeater 400 can be, in addition to the order of the second coil 420, the first coil 410, and the third coil 430, as described above, or the order of the first coil 410, the second coil 420, and the third coil 430, or other arrangements. This application embodiment does not specifically limit this arrangement.

[0078] In one embodiment, such as Figures 4 to 6 As shown, the refrigerant flow direction of the first coil 410 is opposite to that of the second coil 420, and / or the refrigerant flow direction of the first coil 410 is opposite to that of the third coil 430.

[0079] Specifically, the first coil 410 and the second coil 420 or the third coil 430 form refrigerant flow directions that are opposite to each other: that is, when the refrigerant in the first coil 410 flows in a certain direction, the refrigerant in the second coil 420 flows in the opposite direction, and / or, the refrigerant in the third coil 430 also flows in the opposite direction to the first coil 410. The three coils are combined with the same direction of winding and opposite flow channels to build a high-efficiency heat transfer channel on the basis of a tightly fitted structure.

[0080] It should be noted that this reverse flow design maximizes the heat transfer efficiency between the coils. Compared to the co-flow arrangement, the average temperature difference between the first coil 410 and the second and third coils 420 is greater in the counter-flow mode. This allows the high-temperature refrigerant in the first coil 410 flowing out of the condenser 200 to release heat more fully, promoting deep subcooling and significantly improving the system's cooling capacity. Furthermore, it quickly transfers heat to the refrigerant flowing back into the second and third coils 420 and 430, allowing it to fully absorb heat and achieve thorough superheating, effectively preventing liquid slugging of the compressor 100 and ensuring long-term stable system operation. Simultaneously, the efficient counter-flow heat exchange further optimizes the distribution efficiency of medium-temperature and low-temperature cooling capacity, reducing cooling loss. Combined with the 900-degree winding layout of the enclosure, this achieves uniform cooling distribution within the compartment, helping to improve system energy efficiency, reduce energy consumption, and enhance rapid freezing and temperature fluctuation suppression. This provides more reliable heat transfer support for frost-free inner walls and the quality assurance of high-end goods.

[0081] like Figure 4 As shown, the red coil is the first coil 410, and the red arrow indicates the refrigerant flow direction of the first coil 410; as Figure 5 As shown, the dark blue coil is the second coil 420, and the blue arrow indicates the refrigerant flow direction of the second coil 420; as... Figure 6 As shown, the light blue coil is the third coil 430, and the blue arrow indicates the refrigerant flow direction of the third coil 430.

[0082] In one embodiment, the valve assembly 500 includes a regulating valve 510, a first throttling device 520, and a second throttling device 530. The inlet of the regulating valve 510 is connected to the outlet of the condenser 200, one outlet of the regulating valve 510 is connected to the second coil 420 through the first throttling device 520, and the other outlet of the regulating valve 510 is connected to the evaporator 600 through the second throttling device 530.

[0083] Specifically, the inlet of the regulating valve 510, namely the valve inlet mentioned above, is connected to the outlet of the condenser 200. One outlet of the regulating valve 510 is connected to the second coil 420 through the first throttling device 520, and the other outlet of the regulating valve 510 is connected to the evaporator 600 through the second throttling device 530, forming a precise control structure with single inlet diversion and dual throttling adaptation.

[0084] It should be noted that, through the above structural design, on the one hand, the regulating valve 510 can flexibly switch between single-path and dual-path operation modes. In conjunction with the first throttling device 520 and the second throttling device 530, the refrigerant in the medium-temperature path and the low-temperature path can be throttled and depressurized in a targeted manner, so that the two refrigerants can accurately reach the appropriate evaporation temperature. This allows the medium-temperature cooling capacity of the second coil 420 to be used efficiently for cold preservation and heat leakage prevention, and allows the low-temperature cooling capacity of the evaporator 600 and the third coil 430 to focus on rapid freezing, greatly improving the efficiency of cooling capacity utilization. On the other hand, the independent control capability of the dual throttling devices can dynamically adjust the flow rate of the two refrigerants according to different operating scenarios. This ensures that the dual cooling capacity is output in synergy to improve the freezing speed in quick-freezing mode, and that only the medium-temperature path is throttled in heat preservation mode to reduce energy consumption. At the same time, in conjunction with the counter-current heat exchange structure of the heat exchange relay 400, the supercooling and superheating effects of the refrigerant are further enhanced.

[0085] In one embodiment, the outlet of the second coil 420 is connected to the first return port of the compressor 100, and the outlet of the third coil 430 is connected to the second return port of the compressor 100, wherein a switching valve 800 is provided between the first return port and the second return port.

[0086] Specifically, the outlet of the second coil 420, i.e. the medium-temperature flow path, is directly connected to the first return port of the compressor 100, i.e. the medium-temperature return port, and the outlet of the third coil 430, i.e. the low-temperature flow path, is connected to the second return port of the compressor 100, i.e. the low-temperature return port, and a switching valve 800 is connected in series between the first return port and the second return port.

[0087] It should be noted that, since the second return port, as a low-temperature return port, requires a continuous inflow of refrigerant, this embodiment can adapt to the return gas requirements of different operating modes by switching valve 800 on and off, ensuring stable and efficient system operation. For example, in insulation mode, since only the second coil 420 is working, to meet the requirement that refrigerant must flow into the second return port, the switching valve 800 needs to be opened, allowing a portion of the medium-temperature refrigerant output from the second coil 420 to flow to the second return port through the cross-path channel. This ensures the continuity of refrigerant supply to the second return port of compressor 100, while also utilizing medium-temperature cooling capacity to achieve cold preservation, block environmental heat leakage, and reduce energy consumption. Furthermore, in rapid cooling mode, the medium-temperature flow path and the low-temperature flow path work synchronously, and the third coil 430 can stably provide low-temperature refrigerant to the second return port. In this case, it is not necessary to open the switching valve 800, allowing the two return gas paths to flow independently, ensuring that medium-temperature and low-temperature cooling capacity are distributed as needed.

[0088] In one embodiment, the refrigeration system further includes a liquid receiver 700, the inlet of which is connected to the outlet of the second coil 420, and the outlet of which is connected to the return port of the compressor 100.

[0089] Specifically, the refrigeration system adds a liquid storage tank 700 in the medium-temperature flow path. The inlet of the liquid storage tank 700 is connected to the outlet of the second coil 420, and the outlet of the liquid storage tank 700 is connected to the first return gas port of the compressor 100, serving as a buffer and control component for the return gas end of the medium-temperature flow path.

[0090] It should be noted that the liquid receiver 700 can perform gas-liquid separation and capacity buffering of the medium-temperature refrigerant flowing out of the second coil 420, effectively intercepting the incompletely vaporized liquid refrigerant and preventing it from directly entering the compressor 100 and causing liquid slugging damage. At the same time, it stabilizes the return gas pressure and flow rate, making the refrigerant state at the medium-temperature suction end of the compressor 100 more uniform, thereby improving the operating efficiency and service life of the compressor 100.

[0091] In one embodiment, the refrigeration system further includes an anti-condensation pipe 300, the inlet of which is connected to the outlet of the condenser 200, and the outlet of which is connected to the inlet of the first coil 410.

[0092] Specifically, the refrigeration system adds an anti-condensation pipe 300 between the condenser side and the heat exchange relay 400. The inlet of the anti-condensation pipe 300 is connected to the outlet of the condenser 200, and the outlet is connected to the inlet of the first coil 410 of the heat exchange relay 400. The anti-condensation pipe 300 can be arranged at the door seal position of the housing 900.

[0093] It should be noted that, on the one hand, the door seal, as the connection point between the cabinet 900 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 300 at the outlet of the condenser 200 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 900. This ensures the airtight insulation effect of the door seal on the cabinet 900 and reduces heat leakage into the environment. On the other hand, the anti-condensation pipe 300 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 and not affecting the heat exchange efficiency of the refrigerant after it enters the first coil 410.

[0094] In one embodiment, the housing 900 includes an outer wall 910 and an inner liner 950, the inner liner 950 being located inside the outer wall 910, and a heat exchange relay 400 being located between the outer wall 910 and the inner liner 950 and wrapped around the outer surface of the inner liner 950.

[0095] Specifically, the freezer body 900 adopts a layered structure design of outer wall 910, interlayer, and inner liner 950. The body 900 includes the outer wall 910 and the inner liner 950 located inside it. The heat exchange relay 400 is embedded in the interlayer space between the outer wall 910 and the inner liner 950 and is tightly wrapped to the outer surface of the inner liner 950.

[0096] It should be noted that, on the one hand, the heat exchange relay 400, wound around the outer surface of the inner liner 950, can efficiently transfer the cooling capacity of the three coils to the inner liner 950, reducing losses during the cooling process. At the same time, it allows the cooling capacity to evenly cover the entire wall of the inner liner 950. Together with the evaporator 600 inside the chamber, it achieves precise and uniform temperature distribution inside the chamber, 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 chamber 900. When the heat exchange relay 400 is located in this area, its temperature is between the ambient temperature and the chamber temperature, which can effectively offset the heat leakage from the external environment into the chamber, reduce the system's cooling load, and further improve operating efficiency. In addition, this embedded winding layout does not occupy the effective storage space inside the chamber, nor does it interfere with the forced heat exchange function of the evaporator 600.

[0097] In one embodiment, the housing 900 further includes an outer insulation layer 920, which is located between the outer wall 910 and the heat exchange relay 400.

[0098] In one embodiment, the housing 900 further includes an inner insulation layer 940, which is located between the heat exchange relay 400 and the inner liner 950.

[0099] Specifically, the outer insulation layer 920 is tightly filled between the outer wall 910 and the heat exchange relay 400, while the inner insulation layer 940 is fitted between the heat exchange relay 400 and the inner liner 950. The heat exchange relay 400 is fixed to the outer surface of the inner insulation layer 940 by wrapping. The double insulation layers form a wrap-around protection for the heat exchange relay 400 from the angles of outer enclosure and inner bonding.

[0100] It should be noted that, through the above structural design, on the one hand, the outer insulation layer 920 can effectively block the penetration of external environmental heat into the interlayer space, while the inner insulation layer 940 reduces the loss of cold energy from the inner liner 950 to the outside of the heat exchange relay 400. The double insulation layer forms a two-way heat insulation barrier, significantly reducing 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 heat exchange relay 400, providing a stable temperature environment for the countercurrent heat exchange of the first coil 410, the second coil 420, and the third coil 430, avoiding fluctuations in heat transfer efficiency caused by environmental temperature changes, ensuring the stability of refrigerant supercooling and superheating effects, and thus ensuring the reliable realization of functions such as rapid freezing and uniform temperature preservation.

[0101] In one embodiment, the housing 900 further includes a temperature equalization plate 930, which is located between the heat exchange relay 400 and the inner liner 950.

[0102] Specifically, the freezer body 900 has a temperature equalization plate 930 added between the heat exchange repeater 400 and the inner insulation layer 940, forming an optimized hierarchical structure of outer wall 910, outer insulation layer 920, heat exchange repeater 400, temperature equalization plate 930, inner insulation layer 940, and inner liner 950. The temperature equalization plate 930 is tightly attached to the outer surface of the inner insulation layer 940, and the first coil 410, second coil 420, and third coil 430 of the heat exchange repeater 400 are wrapped around the outside of the temperature equalization plate 930. The temperature equalization plate 930 forms a bridge for uniform heat transfer, making the heat exchange between the heat exchange repeater 400 and the inner liner 950 more efficient and balanced.

[0103] It should be noted that, through the above structural design, on the one hand, the temperature uniform plate 930, with its efficient heat conduction characteristics, can quickly receive the cold energy transferred by the three coils of the heat exchange repeater 400 and evenly distribute it to the entire outer surface of the inner liner 950, completely eliminating the phenomenon of local cold energy concentration or insufficient cold energy in the inner liner 950, making the temperature field distribution inside the compartment more balanced, and avoiding uneven quality of high-end goods due to local temperature differences; on the other hand, the presence of the temperature uniform plate 930 increases the contact area for cold energy transfer, reduces the thermal resistance between the coils and the inner liner 950, and allows the cold energy of the heat exchange repeater 400 to be transferred to the compartment more quickly and directly. Combined with the forced heat exchange of the evaporator 600, this 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 950, and help enhance the frost-free effect of the inner wall.

[0104] 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.

[0105] like Figure 8 As shown, Figure 8 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 S810, S820 and S830.

[0106] Step S810: Obtain the temperature of the chamber of the container;

[0107] Step S820: Determine the target operating mode of the refrigeration system based on the compartment temperature;

[0108] Step S830: Control the refrigeration system to operate in the target working mode.

[0109] In one embodiment, the refrigeration system first acquires the chamber temperature of the cabinet in real time, determines the target operating mode of the refrigeration system through preset temperature threshold rules, and then automatically adjusts the on / off state of valve components, compressor speed, coil working combination, and the start / stop of switching valves to make the refrigeration system operate according to the target operating mode.

[0110] It should be noted that the above-mentioned preset temperature threshold rules, such as determining a quick-freezing requirement when the warehouse temperature is higher than the quick-freezing set value, determining a heat preservation requirement when the warehouse temperature is in the cold preservation range, triggering a defrosting requirement when a frost signal is detected, or other triggering conditions, are not specifically limited in this application embodiment.

[0111] Additionally, it should be noted that the aforementioned target working mode can be a freezing mode (i.e., quick-freezing mode), a heat preservation mode, a non-stop defrosting mode, etc., and this application embodiment does not specifically limit it in this regard.

[0112] In addition, it should be noted that, firstly, the embodiment of this application, through the series design of the evaporator and the third coil, combined with the low-temperature flow path of the refrigerant supplied through the outlet of the second valve, can improve the heat exchange efficiency of the air inside the cabinet, quickly reduce the temperature of the goods, effectively reduce the formation of large ice crystals during freezing, avoid damage to the cell structure of high-end goods, and preserve their nutritional components to the greatest extent; secondly, the embodiment of this application, through the parallel winding structure of the first, second, and third coils of the heat exchange relay, allows the high-temperature refrigerant from the condenser outlet to efficiently transfer heat with the second and third coils when flowing through the first coil, wherein the second coil corresponds to the medium-temperature refrigerant. The flow path can fully utilize the medium-temperature cold energy to block heat leakage from the environment to the cabinet, replacing the traditional low-temperature cold energy preservation, and significantly reducing the operating energy consumption of the refrigeration system. In addition, the embodiments of this application combine the air-cooling method of the evaporator with the coil direct cooling method of the heat exchange relay, which can quickly remove moisture from the air inside the cabinet during operation, reduce frost formation inside the cabinet, and eliminate the need for manual or mechanical defrosting. Furthermore, the valve assembly can flexibly control the two refrigerant flow paths, suppressing temperature fluctuations while ensuring continuous refrigeration, ensuring a constant internal temperature of the cabinet, and avoiding quality damage to goods due to temperature changes during defrosting. This can meet the frozen storage needs of high-end goods, thereby improving the user experience.

[0113] In addition, such as Figure 9 As shown, Figure 9 This is a flowchart of a control method for a refrigeration system provided in one embodiment of this application when the temperature of the refrigeration system is between a first preset temperature and a second preset temperature; the control method for the refrigeration system may include, but is not limited to, steps S910, S920 and S930.

[0114] Step S910: Obtain the temperature of the chamber of the container;

[0115] Step S920: When the temperature of the compartment is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, the target working mode of the refrigeration system is determined to be the heat preservation mode, wherein the second preset temperature is greater than the first preset temperature.

[0116] Step S930: Control the refrigeration system to operate in heat preservation mode.

[0117] In one embodiment, firstly, the refrigeration system continuously acquires the chamber temperature of the box in real time and compares the chamber temperature with a first preset temperature and a second preset temperature. When the chamber temperature is detected to meet the condition of being greater than or equal to the first preset temperature and less than or equal to the second preset temperature, the target working mode of the refrigeration system is determined to be the heat preservation mode, and then the operation control of the heat preservation mode is automatically triggered.

[0118] It should be noted that when the target operating mode is heat preservation mode, the refrigeration system will turn on the compressor, connect the valve inlet of the control valve assembly to the first valve outlet, and turn off the fan corresponding to the evaporator. The specific operation is as follows:

[0119] The control valve is switched to a one-in-one-out mode, which only opens the medium-temperature flow path, that is, only the valve inlet and the first valve outlet are opened, and the fan corresponding to the evaporator is turned off. In addition, the switch valve between the first return gas port and the second return gas port can be opened to allow part of the refrigerant output from the medium-temperature coil to flow to the compressor low-temperature return gas port, that is, the second return gas port, to ensure continuous liquid supply at the low-temperature end, and finally enable the system to operate stably in the heat preservation mode.

[0120] It should be noted that the above methods achieve constant temperature preservation and precise energy saving, specifically as follows: On the one hand, by precisely defining the temperature range, the preservation mode is only activated when the compartment temperature is within the stable preservation range, avoiding unnecessary rapid freezing operations that lead to energy waste; on the other hand, in preservation mode, only the medium-temperature coil completes the preservation task, and the on / off design of the switching valve ensures the stable operation of the compressor. This effectively blocks heat leakage from the environment, maintains the compartment temperature constant within the set range, avoids quality changes of high-end goods due to temperature fluctuations, and minimizes system energy consumption. It works synergistically with the cold energy recovery of the heat exchange relay and the double-layer insulation structure to achieve energy saving and efficiency improvement while ensuring storage quality, making the operation of the freezer more in line with the actual needs of low-load preservation scenarios.

[0121] In addition, such as Figure 10 As shown, Figure 10 This is a flowchart of a control method for a refrigeration system provided in one embodiment of this application when the temperature of the compartment is greater than or equal to a second preset temperature; the control method for the refrigeration system may include, but is not limited to, steps S1010, S1020 and S1030.

[0122] Step S1010: Obtain the temperature of the chamber of the container;

[0123] Step S1020: When the temperature of the compartment is greater than the second preset temperature, the target operating mode of the refrigeration system is determined to be the freezing mode;

[0124] Step S1030: Control the refrigeration system to operate in freezing mode.

[0125] In one embodiment, the refrigeration system first continuously collects the temperature of the chamber in real time. When the temperature of the chamber is detected to be greater than or equal to a second preset temperature, the system determines that the target operating mode of the refrigeration system is the freezing mode, and then automatically triggers the operation control of the freezing mode.

[0126] It should be noted that when the target operating mode is freezing mode, the refrigeration system will turn on the compressor, connect the valve inlet of the control valve assembly to the first valve outlet and the second valve outlet, and turn on the fan corresponding to the evaporator. The specific operation is as follows:

[0127] The control valve switches to a one-inlet, two-outlet mode, simultaneously connecting the medium-temperature flow path and the low-temperature flow path. That is, the control valve inlet is connected to the first valve outlet and the second valve outlet. The corresponding fan of the evaporator is started to operate efficiently. The switch valve between the first return gas port and the second return gas port is closed, allowing the medium-temperature coil and the low-temperature coil to independently return refrigerant to the corresponding return gas port of the compressor. Finally, the system operates at full load in refrigeration mode.

[0128] It should be noted that the above methods enable rapid cooling and efficient freezing, specifically as follows: On the one hand, precise temperature threshold triggering ensures timely activation of high-intensity cooling even when the compartment temperature is high. The dual flow paths of medium and low temperatures work together to output cooling capacity. Combined with forced heat exchange in the evaporator and efficient heat transfer in the heat exchange relay, this significantly improves the efficiency of cooling supply and heat exchange rate within the compartment, rapidly lowering the compartment temperature and effectively reducing the formation of large ice crystals during the freezing process, thus preserving the nutritional components and quality of high-end goods to the greatest extent. On the other hand, after the switching valve is closed, the two return gas paths operate independently, avoiding energy loss caused by mixing refrigerants at different temperatures. Combined with precise control of the dual throttling device and the counter-current heat exchange structure, cooling capacity and energy efficiency are optimized simultaneously. This not only solves the problem of insufficient freezing speed in conventional freezers but also maintains stable system operation during high-intensity cooling, ensuring that the freezer's cooling performance precisely matches the needs of rapid freezing scenarios, comprehensively improving the freezing and storage effect of high-end goods.

[0129] In addition, such as Figure 11 As shown, Figure 11 This is a flowchart of a control method for a refrigeration system when the temperature in the compartment is lower than a first preset temperature, according to an embodiment of this application; the control method for the refrigeration system may include, but is not limited to, steps S1110, S1120 and S1130.

[0130] Step S1110: Obtain the temperature of the chamber of the container;

[0131] Step S1120: When the temperature of the compartment is lower than the first preset temperature, obtain the freezer status parameters of the refrigeration system, and determine the target working mode of the refrigeration system as freezing mode or defrosting mode based on the freezer status parameters.

[0132] Step S1130: Control the refrigeration system to operate in either freezing mode or defrosting mode.

[0133] In one embodiment, firstly, the refrigeration system continuously acquires the compartment temperature of the cabinet in real time. When the compartment temperature is detected to be lower than the first preset temperature, it no longer relies solely on the temperature parameter to determine the mode. Instead, it further collects the freezer status parameters of the refrigeration system, such as the evaporator frost thickness, the cumulative running time of the refrigeration system, the refrigeration capacity attenuation coefficient, and other indicators related to the operating status. Based on the preset determination rules, it determines the target operating mode of the refrigeration system as either freezing mode or defrosting mode, and then automatically adjusts the operation of the corresponding components.

[0134] It should be noted that when the target operating mode is freezing mode, the refrigeration system will turn on the compressor, connect the valve inlet of the control valve assembly to the first valve outlet and the second valve outlet, and turn on the fan corresponding to the evaporator. The specific operation is as follows:

[0135] The control valve switches to a one-inlet, two-outlet mode, simultaneously connecting the medium-temperature flow path and the low-temperature flow path. That is, the control valve inlet is connected to the first valve outlet and the second valve outlet. The corresponding fan of the evaporator is started to operate efficiently. The switch valve between the first return gas port and the second return gas port is closed, allowing the medium-temperature coil and the low-temperature coil to independently return refrigerant to the corresponding return gas port of the compressor. Finally, the system operates at full load in refrigeration mode.

[0136] Additionally, it should be noted that when the target operating mode is defrost mode, the refrigeration system will control the valve inlet of the valve assembly to connect to the first valve outlet, shut down the fan corresponding to the evaporator, turn on the defrost heater used to defrost the evaporator, and increase the compressor's operating speed. The specific operation is as follows:

[0137] The defrosting mode of the refrigeration system is similar to the insulation mode, but at this time it is also necessary to control the defrosting heater to quickly remove the frost from the evaporator. At the same time, the compressor speed is increased, which increases the cooling capacity of the refrigeration system to offset the heat that seeps into the cargo compartment due to defrosting.

[0138] In addition, such as Figure 12 As shown, Figure 12 yes Figure 11 A flowchart of the sub-steps of one embodiment of step S1120; step S1120 may include, but is not limited to, steps S1210 and S1220.

[0139] Step S1210: When the temperature of the compartment is lower than the first preset temperature, obtain the freezer status parameters of the refrigeration system;

[0140] Step S1220: When the freezer status parameters include the number of times the compartment door is opened and the rate of temperature rise in the compartment, if the number of times the compartment door is opened is greater than or equal to the preset number and the rate of temperature rise in the compartment is greater than or equal to the preset rate, the target working mode of the refrigeration system is determined to be the freezing mode.

[0141] In one embodiment, the refrigeration system first continuously collects the temperature of the compartment in real time. When the temperature of the compartment is detected to be lower than the first preset temperature, the system further acquires the core status parameters of the refrigeration system, such as the number of times the compartment door is opened and the rate of temperature rise in the compartment. Then, these two parameters are compared with the preset number threshold and the preset rate threshold, respectively. Only when the number of times the compartment door is opened is greater than or equal to the preset number (indicating that outside air is intruding) and the rate of temperature rise in the compartment is greater than or equal to the preset rate (indicating that the cold air in the compartment is being lost quickly), the system determines that the target working mode of the refrigeration system is the freezing mode and automatically triggers the corresponding operation control.

[0142] In addition, such as Figure 13 As shown, Figure 13 yes Figure 11 A flowchart of a sub-step of another embodiment of step S1120; step S1120 may include, but is not limited to, steps S1310 and S1320.

[0143] Step S1310: When the temperature of the compartment is lower than the first preset temperature, obtain the freezer status parameters of the refrigeration system;

[0144] Step S1320: When the freezer status parameters include the defrosting time interval of the evaporator, 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.

[0145] In one embodiment, the refrigeration system first continuously collects the chamber temperature of the cabinet in real time. When the chamber temperature is detected to be lower than the first preset temperature, the system further acquires the core status parameters of the refrigeration system, such as the defrosting time interval of the evaporator. Then, the time interval is compared with the preset defrosting time. When the defrosting time interval reaches the preset defrosting time (indicating that the evaporator has accumulated to the cycle node that requires defrosting), the system determines that the target working mode of the refrigeration system is the defrosting mode and automatically triggers the defrosting-related control.

[0146] In another embodiment, when the refrigeration mode is executed, if the temperature of the compartment is less than or equal to a third preset temperature, the refrigeration system is controlled to switch from the refrigeration mode to the heat preservation mode.

[0147] Specifically, during the operation of the refrigeration system in freezing mode, the system continuously monitors the temperature of the cabinet compartment in real time. When the temperature of the compartment compartment drops to less than or equal to the third preset temperature (such as the minimum temperature threshold adapted to the heat preservation mode), the system automatically triggers the mode switching control logic to switch from freezing mode to heat preservation mode.

[0148] In another embodiment, when the temperature in the storage compartment is less than or equal to a third preset temperature, the refrigeration system is controlled to stop executing the storage mode.

[0149] Specifically, during the operation of the insulation mode, the refrigeration system continuously monitors the temperature of the cabinet compartment in real time and dynamically compares it with a third preset temperature (such as the minimum temperature threshold adapted to the insulation mode). When the temperature of the compartment is detected to be less than or equal to the third preset temperature, it indicates that the temperature of the compartment has reached or fallen below the minimum standard that the insulation mode needs to maintain, and the system automatically controls the refrigeration system to stop executing the insulation mode. If the temperature of the compartment is detected to be still higher than the third preset temperature, it is determined that the compartment still needs to be supplemented with cooling capacity to maintain the cooling effect, and the control system continues to execute the insulation mode, continuously releasing cooling capacity through the medium-temperature flow path and blocking heat leakage from the environment.

[0150] 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.

[0151] This application embodiment constructs a multi-mode adjustable refrigeration system based on a high-efficiency dual-suction compressor, which couples air cooling and direct cooling. Within the same system, it realizes multiple operating mechanisms such as air cooling quick-freezing, direct cooling insulation, inner wall anti-frost, and non-stop defrosting, achieving multiple effects such as deep cooling, quick freezing, uniform temperature, and energy saving.

[0152] like Figure 1 As shown, in typical refrigeration mode, all components of the refrigeration system are operational. The refrigerant first passes through the compressor, then through the condenser, anti-condensation coil, and the first coil (subcooling coil). After entering the regulating valve, it is divided into two paths for medium-temperature throttling and low-temperature throttling, respectively. The refrigerant after medium-temperature throttling enters the second coil (medium-temperature coil), then flows through the receiver and into the compressor's medium-temperature suction port (i.e., the first return port). The refrigerant after low-temperature throttling enters the evaporator, then enters the third coil, and returns to the compressor's low-temperature suction port (i.e., the second return port). The compressor's medium-temperature suction port and low-temperature suction port are connected by a switching valve (such as a shut-off valve). During low-temperature quick-freezing, the second coil, evaporator, and third coil work simultaneously, using medium-temperature cooling capacity to replace traditional low-temperature cooling capacity for cold preservation, thus improving energy efficiency. During quick-freezing operation, not only can the moisture in the air inside the cabinet be removed, but the frost on the inner wall of the cabinet can also be sublimated 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 machine and reducing temperature fluctuations.

[0153] like Figures 3 to 6 As shown, the heat exchange repeater can be a sandwich type, consisting of a first coil, a second coil, and a third coil. The first coil has the highest temperature, the third coil has the lowest temperature, and the second coil has an intermediate temperature. Initially, the first coil transfers heat to the second and third coils, while the second coil also exchanges heat with the third coil, thus transferring the cooling capacity from the high evaporation temperature to the low evaporation temperature, improving energy efficiency. Simultaneously, the subcooling of the first coil increases its cooling capacity, and the heating of the second and third coils to superheat further increases their cooling capacity. Therefore, the heat exchange repeater has a dual function of improving cooling capacity and energy efficiency. Furthermore, because this sandwich-type heat exchange repeater is located in the middle of the insulation layer, its temperature is between the ambient temperature and the compartment temperature, which can offset ambient heat leakage and reduce the compartment load. To achieve a more uniform temperature distribution, a temperature equalization plate is installed, with the three coils wound around it to conduct the cooling capacity across the entire plane, realizing multi-temperature zone heat recovery and uniform distribution along the wall, thus solving the bottleneck in capacity and efficiency improvement.

[0154] like Figure 14 As shown, Figure 14 This is an overall flowchart of a control method for a refrigeration system provided in one embodiment of this application, which may include, but is not limited to, steps S1401 to S1411.

[0155] Step S1401: Begin;

[0156] Step S1402: Determine whether the temperature of the chamber is greater than or equal to Tset+a and lasts for more than 5 minutes. If yes, proceed to step S1403; otherwise, proceed to step S1406.

[0157] Step S1403: Determine whether the temperature of the compartment is less than or equal to Tset+c. If yes, proceed to step S1404; otherwise, proceed to step S1407.

[0158] Step S1404: Execute the heat preservation mode, and continue to execute step S1405;

[0159] Step S1405: Determine whether the temperature of the compartment is less than or equal to Tset-d and lasts for more than 5 minutes. If yes, proceed to step S1411; otherwise, proceed to step S1404.

[0160] Step S1406: Determine whether the number of times the compartment door is opened is greater than or equal to 1 time and whether the temperature rise rate of the compartment is greater than or equal to b and lasts for more than 5 minutes. If yes, proceed to step S1407; otherwise, proceed to step S1409.

[0161] Step S1407: Execute the freeze mode, and continue to execute step S1408;

[0162] Step S1408: Determine whether the temperature of the compartment is less than or equal to Tset-d and lasts for more than 5 minutes. If yes, proceed to step S1404; otherwise, proceed to step S1407.

[0163] Step S1409: Determine whether the defrosting time interval of the evaporator is met. If yes, proceed to step S1410; otherwise, proceed to step S1411.

[0164] Step S1410: Execute defrosting mode on the evaporator, and then execute step S1411;

[0165] Step S1411, End.

[0166] Wherein, Tset is the set temperature, with a value range of (-18~-75℃), a range of (0~1℃), b range of (0.05~0.2℃), c range of (0.5~2℃), and d range of (0~1.5℃). a and d cannot both be 0, and c must be greater than a. Furthermore, Tset+a represents the first preset temperature, Tset+c represents the second preset temperature, Tset-d represents the third preset temperature, and b represents the preset rate. Regarding the preset number of times, it can be once as mentioned above, or it can be more than once; this embodiment does not specifically limit this.

[0167] In addition, the above-mentioned heat preservation mode is as follows: In heat preservation mode, the compressor drives the system to cool, and the regulating valve is adjusted to a one-in-one-out mode. The refrigerant only flows to the medium temperature flow path, the low temperature side is closed, the evaporator fan is also turned off, the compressor suction end bypass switch valve is opened, and the system operation blocks external heat leakage.

[0168] In addition, the freezing mode mentioned above is as follows: In freezing mode, the compressor drives the system to cool, and the regulating valve is adjusted to a one-in-two-out mode. The refrigerant flows to the medium-temperature side and the low-temperature side at the same time. The evaporator works, and the bypass valve at the compressor suction end is closed. At this time, the system's cooling capacity increases and the heat exchange efficiency between the goods and the air is high, so the goods are frozen quickly.

[0169] In addition, the defrosting mode mentioned above is as follows: In the evaporator defrosting mode, the system does not stop and the system operation is similar to the heat preservation mode. However, at this time, the defrosting heater (such as the heating wire set on the surface of the evaporator) works to quickly remove the frost layer on the evaporator. At the same time, the compressor speed increases, which increases the cooling capacity of the refrigeration system and offsets the heat infiltration into the cargo compartment caused by defrosting.

[0170] The control method of the refrigeration system based on the above embodiments has the following technical effects: 1. By accelerating the heat exchange efficiency of the cargo surface through air cooling, the freezing rate is increased; 2. By using medium-temperature energy to block heat leakage from the environment, energy efficiency is improved; 3. By combining air cooling and direct cooling, the inner wall is frost-free; 4. By defrosting without stopping the machine, the temperature inside the warehouse remains constant and the refrigeration capacity does not decrease.

[0171] 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.

[0172] like Figure 15 As shown, Figure 15 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 1000 implemented in this application includes: a processor 1010, a memory 1020, and a computer program stored in the memory 1020 and executable on the processor 1010, wherein... Figure 15 The example uses a processor 1010 and a memory 1020.

[0173] The processor 1010 and the memory 1020 can be connected via a bus or other means. Figure 15 Taking the example of a connection between China and Israel via a bus.

[0174] Memory 1020, 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 1020 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 1020 may optionally include remotely located memories 1020 relative to processor 1010, which can be connected to controller 1000 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.

[0175] Those skilled in the art will understand that Figure 15 The device structure shown does not constitute a limitation on the controller 1000 and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0176] exist Figure 15In the controller 1000 shown, the processor 1010 can be used to call the control program stored in the memory 1020, thereby implementing the control method of the refrigeration system described above. Specifically, the non-transient software program and instructions required to implement the control method of the refrigeration system in the above embodiment are stored in the memory 1020. When executed by the processor 1010, the control method of the refrigeration system in the above embodiment is executed.

[0177] It is worth noting that since the controller 1000 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 1000 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.

[0178] Furthermore, one embodiment of this application also provides a refrigeration system, which includes the controller described in the above embodiment.

[0179] 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.

[0180] 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 8 to 14 The methods and steps in the text.

[0181] 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.

[0182] 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 8 to 14 The methods and steps in the text.

[0183] 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.

[0184] 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.

[0185] 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.

[0186] 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.

[0187] It should also be understood that the various implementation methods provided in this application can be combined arbitrarily to achieve different technical effects.

[0188] 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 in that, include: The compressor, condenser, evaporator, and housing are provided, wherein the exhaust port of the compressor is connected to the inlet of the condenser, and the evaporator is installed in the housing. A heat exchange relay includes a first coil, a second coil, and a third coil, wherein the first coil, the second coil, and the third coil are wound around the housing; The valve assembly is provided with a valve inlet, a first valve outlet, and a second valve outlet. The outlet of the condenser is connected to the valve inlet through the first coil, the first valve outlet is connected to the return port of the compressor through the second coil, and the second valve outlet is connected to the return port of the compressor through the evaporator and the third coil in sequence. When the refrigerant at the outlet of the condenser flows through the first coil, it transfers heat with the second coil and the third coil. In addition, in heat preservation mode, the valve inlet of the control valve assembly is connected only to the first valve outlet; in freezing mode, the valve inlet of the control valve assembly is connected to both the first valve outlet and the second valve outlet.

2. The refrigeration system according to claim 1, characterized in that, The first coil, the second coil, and the third coil are arranged side by side along the height direction of the housing.

3. The refrigeration system according to claim 2, characterized in that, The first coil is located between the second coil and the third coil, with the second coil abutting against a first side of the first coil and the third coil abutting against a second side of the first coil.

4. The refrigeration system according to claim 2, characterized in that, The refrigerant flow direction of the first coil is opposite to that of the second coil, and / or the refrigerant flow direction of the first coil is opposite to that of the third coil.

5. The refrigeration system according to claim 1, characterized in that, The valve assembly includes a regulating valve, a first throttling device, and a second throttling device. The inlet of the regulating valve is connected to the outlet of the condenser, one outlet of the regulating valve is connected to the second coil through the first throttling device, and the other outlet of the regulating valve is connected to the evaporator through the second throttling device.

6. The refrigeration system according to claim 1, characterized in that, The outlet of the second coil is connected to the first return port of the compressor, and the outlet of the third coil is connected to the second return port of the compressor. A switching valve is provided between the first return port and the second return port.

7. The refrigeration system according to claim 1, characterized in that, The refrigeration system further includes at least one of the following: A liquid storage tank, the inlet of which is connected to the outlet of the second coil, and the outlet of which is connected to the return port of the compressor; An anti-condensation pipe, the inlet of which is connected to the outlet of the condenser, and the outlet of which is connected to the inlet of the first coil.

8. The refrigeration system according to claim 1, characterized in that, The enclosure includes an outer wall and an inner liner, the inner liner being located inside the outer wall, and the heat exchange relay being located between the outer wall and the inner liner and wrapped around the outer surface of the inner liner.

9. The refrigeration system according to claim 8, characterized in that, The enclosure also includes at least one of the following: An external insulation layer is located between the outer wall and the heat exchange relay. An inner insulation layer is located between the heat exchange relay and the inner liner; A temperature equalization plate is located between the heat exchange relay and the inner liner.

10. A control method for a refrigeration system, characterized in that, The method, applied to the refrigeration system according to any one of claims 1 to 9, comprises: Obtain the chamber temperature of the box; The target operating mode of the refrigeration system is determined based on the temperature of the compartment. Control the refrigeration system to operate in the target operating mode.

11. The method according to claim 10, characterized in that, Determining the target operating mode of the refrigeration system based on the compartment temperature includes at least one of the following: When the temperature of the compartment is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, the target operating mode of the refrigeration system is determined to be the heat preservation mode, wherein the second preset temperature is greater than the first preset temperature; When the temperature of the compartment is greater than the second preset temperature, the target operating mode of the refrigeration system is determined to be the freezing mode. When the temperature of the compartment is lower than the first preset temperature, the freezer status parameters of the refrigeration system are obtained, and the target working mode of the refrigeration system is determined to be either freezing mode or defrosting mode based on the freezer status parameters.

12. The method according to claim 11, characterized in that, The step of determining the target operating mode of the refrigeration system as either freezing mode or defrosting mode based on the freezer status parameters includes one of the following: When the freezer status parameters include the number of times the compartment door is opened and the rate of temperature rise in the compartment, if the number of times the compartment door is opened is greater than or equal to a preset number and the rate of temperature rise in the compartment is greater than or equal to a preset rate, the target operating mode of the refrigeration system is determined to be the freezing mode. When the refrigerator status parameters include the defrosting time interval of the evaporator, 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.

13. The method according to claim 11, characterized in that, The method further includes at least one of the following: When the freezing mode is executed, if the temperature of the compartment is less than or equal to a third preset temperature, the refrigeration system is controlled to switch from the freezing mode to the heat preservation mode. When the insulation mode is executed, if the temperature of the compartment is less than or equal to a third preset temperature, the refrigeration system is controlled to stop executing the insulation mode.

14. The method according to claim 11, characterized in that, Controlling the refrigeration system to operate in the target operating mode includes one of the following: When the target working mode is the heat preservation mode, the compressor is turned on, the valve inlet of the valve assembly is connected to the first valve outlet, and the fan corresponding to the evaporator is turned off; When the target operating mode is the freezing mode, the compressor is turned on, the valve inlet of the valve assembly is connected to the first valve outlet and the second valve outlet, and the fan corresponding to the evaporator is turned on; When the target operating mode is defrosting mode, the valve inlet of the valve assembly is connected to the first valve outlet, the fan corresponding to the evaporator is turned off, the defrosting heater for defrosting the evaporator is turned on, and the operating speed of the compressor is increased.

15. A controller, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, performs a control method for a refrigeration system as described in any one of claims 10 to 14.

16. 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 14.

17. A computer program product, comprising a computer program or computer instructions, characterized in that, The computer program or the computer instructions are stored in a computer-readable storage medium, the processor of the computer device reads the computer program or the computer instructions from the computer-readable storage medium, and the processor executes the computer program or the computer instructions to cause the computer device to perform the control method of the refrigeration system as described in any one of claims 10 to 14.

Images