Refrigeration appliance and method of tempering thereof

Abstract

The application discloses a refrigeration equipment and a temperature recovery method thereof, and belongs to the technical field of refrigeration equipment. The refrigeration equipment comprises a first chamber, an evaporator arranged in the first chamber, a second chamber, a first air duct, a second air duct and an airflow driving element. The first chamber and the second chamber are connected through the first air duct and the second air duct. The temperature recovery method comprises recovering the evaporator and the chamber when the refrigeration equipment stops working. According to the technical scheme, when the user has no refrigeration demand, external environment air is introduced into each chamber in stages and zones to recover the temperature of each chamber, the temperature of each chamber is finally recovered to be close to the ambient temperature, all the second chambers are switched to an open state that can be connected to the external environment, and the refrigeration equipment is switched to a normal-temperature storage mode.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and in particular to a refrigeration device and its reheating method. Background Technology

[0002] When users do not need to use the refrigerator temporarily, the sealed cavity structure inside prevents air circulation. Furthermore, as the temperature slowly rises, residual food scraps and moisture can easily breed bacteria and mold inside the refrigerator, producing a pungent odor. Users must clean and disinfect the refrigerator before using it again, which not only increases the burden of use but also poses certain hygiene and safety risks. Summary of the Invention

[0003] This application provides a refrigeration device and a temperature recovery method to solve the technical problem that existing traditional refrigeration devices are prone to bacterial growth in their internal storage compartments when idle, making them unusable as normal storage cabinets.

[0004] To achieve the above objectives, according to a first aspect of this application, a refrigeration device is provided, including a first chamber having a first air inlet and a first air outlet; An evaporator is disposed within the first chamber; The second chamber has a second air inlet and a second air outlet, and both the second air inlet and the second air outlet are equipped with a first switch; The first air duct is connected to the first air inlet and the second air outlet respectively; the first air duct is provided with a third air inlet; The second air duct is connected to the first air outlet and the second air inlet respectively; the second air duct is provided with a third air outlet; both the third air inlet and the third air outlet are provided with a second switch; An airflow drive is used to drive airflow from the third air inlet through the first chamber to the third air outlet when the second switch is open and the first switch is closed. The airflow temperature introduced through the third air inlet is greater than the internal temperature of the first chamber.

[0005] Optionally, there are multiple second chambers that are spaced apart from each other, and the multiple second chambers are connected in parallel between the first air duct and the second air duct; The second air outlet of each second chamber is connected to the first air duct, and the second air inlet of each second chamber is connected to the second air duct.

[0006] Optionally, the first chamber has a plurality of first air inlets and a plurality of first air outlets; The refrigeration equipment includes multiple first air ducts, multiple second air ducts, and multiple second chambers. Each first air duct is connected to a first air inlet, and each second air duct is connected to a first air outlet. Each second chamber is connected to a first air duct and a second air duct, respectively.

[0007] Optionally, at least one set of corresponding first air ducts and second air ducts are provided with multiple independent second chambers; the second air outlet of each second chamber is connected to the first air duct, and the second air inlet of each second chamber is connected to the second air duct.

[0008] Optionally, the refrigeration equipment further includes a third chamber, in which a compressor is installed, and the third chamber is connected to the first air duct through the third air inlet; When the compressor is operating, the internal temperature of the third chamber is greater than or equal to the internal temperature of the first chamber.

[0009] Optionally, the first air inlet and the first air outlet are disposed opposite each other on both sides of the evaporator, so that the airflow introduced through the first air inlet passes through the evaporator and is discharged from the first air outlet.

[0010] Optionally, the airflow driving element is in multiple sets; At least one set of the airflow driving components is disposed in the second air duct near the first air outlet, for driving airflow back from the second chamber to the first chamber; At least one set of the airflow driving components is disposed in the first air duct and located between the first air inlet and the third air outlet, for driving airflow into the second chamber and / or exhausting it to the outside.

[0011] According to a second aspect of this application, a warming method is provided, comprising the following steps: When the refrigeration equipment is shut down, the external airflow temperature and the surface temperature of the evaporator are obtained; When the external airflow temperature is higher than the surface temperature of the evaporator, the evaporator is reheated. After the evaporator has completed its reheating process, the second chamber is reheated. Once the second chamber has fully warmed up, connect the second chamber to the external environment, and the refrigeration equipment enters a normal temperature storage mode.

[0012] Optionally, when the external ambient temperature is higher than the surface temperature of the evaporator, warming the evaporator includes: The first switch is controlled to close, the second switch is controlled to open, and the airflow drive is controlled to open and introduce external airflow to reheat the evaporator.

[0013] Optionally, the process of warming up the second chamber after the evaporator has warmed up includes: When the difference between the temperature of the evaporator and the preset temperature is less than or equal to the first preset threshold, the evaporator temperature recovery is completed, the second switch is controlled to close, and the first switch is controlled to open. The airflow is driven by the airflow drive to circulate the airflow inside the first chamber and the second chamber, so that the evaporator and the second chamber can exchange heat.

[0014] Optionally, the process of warming up the second chamber after the evaporator has warmed up includes: When the second switch is closed and the first switch is open, the internal temperature of the second chamber is obtained; When the difference between the temperature of the evaporator and the internal temperature of the second chamber is less than or equal to a first preset threshold, and the difference between the internal temperature of the second chamber and the preset temperature is greater than a second preset threshold, the second switch is controlled to open, and the first switch is controlled to close. External airflow is introduced into the first chamber via the airflow drive component, and the external airflow is discharged from the first chamber after exchanging heat with the evaporator. Once the evaporator has fully recovered its temperature, the second switch is turned off.

[0015] Optionally, the process of warming up the second chamber after the evaporator has warmed up includes: When the second switch is closed and the first switch is open, the internal temperature of the second chamber is obtained; If the difference between the temperature of the evaporator and the internal temperature of the second chamber is greater than a first preset threshold, and the difference between the internal temperature of the second chamber and the preset temperature is greater than a second preset threshold, the closing time of the second switch is obtained, and the first switch is controlled to close. If the closing time of the second switch is greater than or equal to a preset time, the second switch is controlled to open. External airflow is introduced into the first chamber via the airflow drive component, and the external airflow is discharged from the first chamber after exchanging heat with the evaporator. Once the evaporator has fully recovered its temperature, the second switch is turned off. When the second switch is on, the closing time of the second switch is reset to zero and recalculated. Wherein, the first preset threshold is less than the second preset threshold.

[0016] Optionally, there are multiple second chambers, and the multiple second chambers are independent of each other; The process of rewarming multiple second chambers includes the following steps: acquiring the internal temperature of each second chamber; When the internal temperature of any of the second chambers is less than or equal to a third preset threshold, the first switch of the second chamber is controlled to open. If the internal temperature of any of the second chambers exceeds a third preset threshold, the first switch of the second chamber is controlled to close.

[0017] Optionally, the multiple second chambers are reheated, including the following steps: obtaining the internal temperature of each second chamber; When the internal temperature of each of the second chambers is greater than a third preset threshold, the first switches of the multiple second chambers are all turned on.

[0018] Optionally, the multiple second chambers are reheated, including the following steps: obtaining the internal temperature of each second chamber; If the internal temperature of any of the second chambers is less than or equal to a third preset threshold, the second chamber is a freezer chamber; If the internal temperature of any of the second chambers is greater than a third preset threshold, the second chamber is a cold storage room; Obtain the internal temperature of the freezer compartment; When the difference between the internal temperature of each freezer compartment and the preset temperature is less than or equal to the second preset threshold, the first switch of the freezer compartment is controlled to close, and the first switch of the refrigerator compartment is controlled to open.

[0019] Optionally, the method for restoring the temperature of the plurality of said cold storage compartments includes: Obtain the internal temperature of each of the aforementioned cold storage compartments; When the difference between the internal temperature of the cold storage compartment and the preset temperature is less than or equal to the second preset threshold, the first switch of the cold storage compartment is controlled to close.

[0020] Optionally, the temperatures of the refrigeration compartment and the freezer compartment are obtained; If the difference between the internal temperature of all the refrigerator compartments and the freezer compartments and the preset temperature is less than the second preset threshold, it is determined that the rewarming of all the second chambers is complete. Each of the first and second switches is kept on, and each airflow drive is turned off, so that the refrigeration equipment is switched to room temperature storage mode.

[0021] In the temperature recovery method of this application embodiment, when the refrigeration equipment stops working, the temperature difference between the second chamber and the evaporator is obtained; when the difference is less than or equal to a first preset threshold, the first switch, the second switch, and the airflow drive are controlled to open, introducing external airflow into the closed loop; when the difference is greater than the first preset threshold, the first switch is controlled to close, the second switch is controlled to open, and the airflow drive is controlled to open, introducing external airflow to recover the temperature of the evaporator. This temperature recovery method enables the refrigeration equipment to recover the temperature of each chamber by introducing external ambient air in stages and zones when the user has no immediate need for cooling, ultimately raising the temperature of each chamber to near the ambient temperature and switching all refrigerated chambers to an open state that allows them to connect to the external environment. At this time, the refrigeration equipment can be used as a regular storage cabinet, and the user can store items that do not require refrigeration in its internal chambers.

[0022] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0025] Figure 1 This is a schematic diagram of the connection structure between the chamber and the air duct of the refrigeration equipment provided in an exemplary embodiment of this disclosure; Figure 2 This is a schematic diagram of a structure in which multiple second chambers are connected in parallel to the same air duct according to an exemplary embodiment of this disclosure; Figure 3 This is a schematic diagram of a structure in which multiple second chambers are connected in parallel to a first chamber, according to an exemplary embodiment of this disclosure; Figure 4 This is a schematic diagram of the connection structure between the multiple second chambers and the first chamber provided in an exemplary embodiment of this disclosure; Figure 5 This is a flowchart of the evaporator reheat process provided in an exemplary embodiment of this disclosure; Figure 6 This is a flowchart of the second chamber reheating process provided in an exemplary embodiment of this disclosure; Figure 7 This is a flowchart of evaporator reheating based on the evaporator and second chamber temperatures provided in an exemplary embodiment of this disclosure. Figure 8 This is a flowchart of the evaporator reheating process based on the second switch closing time provided in an exemplary embodiment of this disclosure; Figure 9 This is the main flow chart of the separate temperature recovery of the freezer compartment and the refrigerator compartment provided in the exemplary embodiments of this disclosure; Figure 10 This is a detailed flowchart illustrating the separate temperature recovery process for the freezer and refrigerator compartments provided in an exemplary embodiment of this disclosure.

[0026] Explanation of reference numerals in the attached figures: 100. First chamber; 110. First air inlet; 120. First air outlet; 200. Evaporator; 300, Second chamber; 310, Second air inlet; 320, Second air outlet; 330, First switch; 400. First air duct; 410. Third air inlet; 500. Second air duct; 510. Third air outlet; 600. Second switch; 700. Airflow drive components; 800. Third chamber. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Figure 1 This is a schematic diagram of the connection structure between the chamber and the air duct of the refrigeration equipment provided in an exemplary embodiment of this disclosure; Figure 2 This is a schematic diagram of a structure in which multiple second chambers are connected in parallel to the same air duct according to an exemplary embodiment of this disclosure; Figure 3 This is a schematic diagram of a structure in which multiple second chambers are connected in parallel to a first chamber, according to an exemplary embodiment of this disclosure; Figure 4 This is a schematic diagram of the connection structure between the multiple second chambers and the first chamber provided in an exemplary embodiment of this disclosure; Figure 5 This is a flowchart of the evaporator reheat process provided in an exemplary embodiment of this disclosure; Figure 6 This is a flowchart of the second chamber reheating process provided in an exemplary embodiment of this disclosure; Figure 7 This is a flowchart of evaporator reheating based on the evaporator and second chamber temperatures provided in an exemplary embodiment of this disclosure. Figure 8 This is a flowchart of the evaporator reheating process based on the second switch closing time provided in an exemplary embodiment of this disclosure; Figure 9This is the main flow chart of the separate temperature recovery of the freezer compartment and the refrigerator compartment provided in the exemplary embodiments of this disclosure; Figure 10 This is a detailed flowchart illustrating the separate temperature recovery process for the freezer and refrigerator compartments according to an exemplary embodiment of this disclosure. Clearly, the described embodiments are merely a portion of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the protection scope of this application.

[0028] As people's living standards improve, refrigeration and storage have become an indispensable necessity in daily life. In spaces with limited capacity, such as RVs, yachts, and small hotel rooms, freestanding refrigerators are typically installed to meet users' refrigeration needs.

[0029] However, the refrigerators in the above scenarios are mostly used intermittently, not continuously. When users do not need to use the cooling function temporarily, the sealed cavity structure inside a traditional refrigerator will prevent air circulation. During the slow temperature rise, residual food residue and moisture can easily breed bacteria and mold, producing a pungent odor. Users must thoroughly clean and disinfect the refrigerator before using it again.

[0030] To address the technical problems of long reheating times and bacterial growth within the sealed refrigerator compartment, this application provides a refrigeration device. Please refer to [link / reference]. Figure 1 and Figure 2 The refrigeration equipment includes a first chamber 100, an evaporator 200, a second chamber 300, a first air duct 400, a second air duct 500, and an airflow drive component 700. The first chamber 100 is an independent space in the refrigeration equipment for accommodating the evaporator 200, and the first chamber 100 has a first air inlet 110 and a first air outlet 120 arranged opposite to each other. Specifically, the airflow enters the first chamber 100 through the first air inlet 110 and then exits the first chamber 100 through the first air outlet 120. The evaporator 200 is arranged on the airflow path from the first air inlet 110 to the first air outlet 120 so that the airflow entering the first chamber 100 through the first air inlet 110 passes through the evaporator 200 and undergoes heat exchange, and then exits the first chamber 100 through the first air outlet 120.

[0031] It should be noted that the walls of the first chamber 100 are provided with thermal insulation material. This insulation material is used to reduce heat transfer between the interior of the first chamber 100 and the external environment. In cooling mode, the insulation material effectively prevents heat from the external environment from entering the interior of the first chamber 100, reducing the cooling capacity loss of the cooling system and improving cooling efficiency. In warming mode, the insulation material slows down the heat loss from the high-temperature airflow introduced through the third air inlet 410 to the outside of the first chamber 100, concentrating heat on the surface of the evaporator 200 and improving warming efficiency.

[0032] Optionally, the insulation material is any one of polyurethane foam, vacuum insulation board, extruded polystyrene foam, or glass wool. In this embodiment, polyurethane foam is preferably used as the insulation material. The polyurethane foam is filled into the cavity wall interlayer of the first chamber 100 through an on-site foaming process to form an integrated insulation structure with the cavity wall.

[0033] The second chamber 300 has a second air inlet 310 and a second air outlet 320. The second chamber 300 is a storage space in the refrigeration equipment for storing items. Specifically, the second air inlet 310 and / or the second air outlet 320 are provided with a first switch 330, which is used to block the airflow channel between the first chamber 100 and the second chamber 300.

[0034] In one implementation, the first switch 330 can be implemented using any airflow control element among dampers, valves, or electric dampers. This embodiment does not limit the specific type of the first switch 330, as long as it can achieve the opening and closing of the airflow channel.

[0035] Furthermore, the first switch 330 has certain heat insulation and sealing effects. Specifically, when the first switch 330 is in the closed state, while blocking the airflow, it can also block the heat transfer between the second chamber 300 and the first air duct 400 and the second air duct 500 to a certain extent, reducing the loss of cold energy from the second chamber 300 to the air duct side; at the same time, the sealing structure of the first switch 330 can effectively reduce airflow leakage and ensure the airtightness of the second chamber 300 in the closed state.

[0036] It should be noted that the walls of the second chamber 300 are lined with insulating material. This insulation material reduces heat transfer between the interior of the second chamber 300 and the external environment, maintaining the low-temperature environment required for the stored items within the second chamber 300.

[0037] Optionally, the insulation material is any one of polyurethane foam, vacuum insulation board, extruded polystyrene foam, or glass wool. In this embodiment, polyurethane foam is preferably used as the insulation material. The polyurethane foam is filled into the cavity wall interlayer of the first chamber 100 through an on-site foaming process to form an integrated insulation structure with the cavity wall.

[0038] The first air duct 400 has a first end and a second end; the first end of the first air duct 400 is connected to the first air inlet 110 of the first chamber 100, and the second end of the first air duct 400 is connected to the second air outlet 320 of the second chamber 300; wherein the connection between the first air duct 400 and the first chamber 100 and the second chamber 300 is a sealed connection. The first air duct 400 is a tubular or box-shaped structure with a hollow cavity, and an airflow channel is formed inside it.

[0039] It should be noted that the first air duct 400 has a third air inlet 410 on its pipe wall, and the third air inlet 410 is used to connect the first air duct 400 with the external environment; specifically, a second switch 600 for blocking the airflow channel is provided at the third air inlet 410.

[0040] The second air duct 500 has a third end and a fourth end; the third end of the second air duct 500 is connected to the first air outlet 120 of the first chamber 100, and the fourth end of the second air duct 500 is connected to the second air inlet 310 of the second chamber 300; wherein the connection between the second air duct 500 and the first chamber 100 and the second chamber 300 is a sealed connection. The second air duct 500 is a tubular or box-shaped structure with a hollow cavity, and an airflow channel is formed inside it.

[0041] It should be noted that the second air duct 500 has a third air outlet 510 on its duct wall, and the third air outlet 510 is used to connect the second air duct 500 with the external environment; specifically, a second switch 600 for blocking the airflow channel is provided at the third air outlet 510.

[0042] It should be noted that the first chamber 100, the second air duct 500, the second chamber 300, and the first air duct 400 are connected in sequence to form a closed loop. The second switches 600 installed at the third air outlet 510 and the third air inlet 410 are opened and closed simultaneously.

[0043] In the recovery mode, the second switches 600 located at the third air inlet 410 and the third air outlet 510 are simultaneously turned on, connecting the external environment with the first air duct 400 and the second air duct 500; the first switch 330 is controlled to close the airflow passage blocking the first chamber 100 and the second chamber 300. External airflow is introduced through the third air inlet 410, enters the first chamber 100 through the first air duct 400, passes through the evaporator 200, and is discharged from the third air outlet 510 through the second air duct 500.

[0044] The airflow drive 700 is disposed anywhere in the airflow circuit except where the evaporator 200 and the second chamber 300 are located. Specifically, the airflow drive 700 can be disposed anywhere in the airflow circuit of the refrigeration equipment that can drive the airflow, but avoids the heat exchange area where the evaporator 200 is located and the storage area where the second chamber 300 is located, so as to reduce interference with the heat exchange performance of the evaporator 200 and the storage environment of the second chamber 300.

[0045] Specifically, in the cooling mode, the driving airflow forms a circulating flow between the second chamber 300 and the first chamber 100; heat exchange is performed between the low temperature of the first chamber 100 and the temperature of the second chamber 300 to maintain the second chamber 300 at a low temperature.

[0046] Optionally, the airflow drive 700 can be any of the airflow generating devices driven by a fan, a blower, or a compressor. This embodiment does not limit the specific type of the airflow drive 700. Any device capable of driving airflow to flow along a preset path between the first chamber 100, the second chamber 300, the first air duct 400, and the second air duct 500 can be used as the airflow drive 700 in this embodiment.

[0047] The air introduced through the third air inlet 410 is external air, and the temperature of the external air is the same as the indoor temperature and higher than the temperature of the first chamber 100 and the second chamber 300.

[0048] Specifically, the controller is used to acquire temperature information collected by the temperature sensor, compare the temperature information with a preset threshold, and control the first switch 330, the second switch 600 and the airflow drive 700 to perform corresponding actions based on the comparison result.

[0049] As one implementation method, please refer to Figure 2 and Figure 3 A temperature sensor can be positioned on the evaporator 200 near the first air outlet 120 (where the surface temperature of the evaporator 200 is lowest in recirculation mode) to detect the surface temperature of the evaporator 200. A temperature sensor is also located inside the second chamber 300 to monitor the temperature of the second chamber 300.

[0050] In cooling mode, the temperature sensor detects the internal temperature of the second chamber 300 and sends the temperature information to the controller. The controller compares the internal temperature of the second chamber 300 with a first preset threshold. When the internal temperature of the second chamber 300 is lower than the first preset threshold, it indicates that the second chamber 300 has reached the target cooling temperature. The controller then closes the first switch 330 corresponding to the second chamber 300, blocking the connection between the first chamber 100 and the second chamber 300, and stops the airflow drive 700. When the internal temperature of the second chamber 300 rises above a third preset threshold, the controller reopens the first switch 330 and starts the airflow drive 700, resuming the cooling cycle. The third preset threshold is greater than the first preset threshold; by setting a hysteresis range between the first and third preset thresholds, the frequent start-stop of the airflow drive 700 is reduced.

[0051] In the reheating mode, the controller closes the first switch 330 and opens the second switch 600, and activates the airflow drive 700 to allow outside air to pass through the first chamber 100 to reheat the evaporator 200. The outside air temperature is higher than the temperatures of the first chamber 100 and the second chamber 300. During the reheating process, a temperature sensor detects the surface temperature of the evaporator 200 near the first air outlet 120 and sends this information to the controller. The controller compares the surface temperature of the evaporator 200 with the ambient temperature. When the difference between the surface temperature of the evaporator 200 and the ambient temperature is less than or equal to a first preset threshold, it indicates that the evaporator 200 has completed reheating. The controller then closes the second switch 600 and opens the first switch 330 corresponding to the second chamber 300, initiating the reheating process for the second chamber 300.

[0052] In some embodiments, there are multiple second chambers 300, and the multiple second chambers 300 are spaced apart from each other. The multiple second chambers 300 are connected in parallel between the first air duct 400 and the second air duct 500.

[0053] Specifically, the second air outlet 320 of each second chamber 300 is connected to the first air duct 400, and the second air inlet 310 of each second chamber 300 is connected to the second air duct 500. In other words, the first air duct 400 is simultaneously connected to the second air outlets 320 of multiple second chambers 300, forming multiple converging air inlet side passages; the second air duct 500 is simultaneously connected to the second air inlets 310 of multiple second chambers 300, forming multiple branching air outlet side passages.

[0054] Each second chamber 300 has a second air inlet 310 and a second air outlet 320 equipped with a first switch 330. The first switches 330 corresponding to each of the multiple second chambers 300 are independently controlled, so that each second chamber 300 can be independently connected to or disconnected from the first air duct 400 and the second air duct 500.

[0055] Multiple second chambers 300 can be allocated into different types of storage spaces according to actual usage needs. Optionally, some second chambers 300 are configured as refrigerated compartments for storing items that require refrigeration and preservation; some second chambers 300 are configured as freezer compartments for storing items that require freezing and preservation.

[0056] Each second chamber 300 is equipped with a temperature sensor, which is used to detect the internal temperature of the corresponding second chamber 300 and send the temperature information to the controller.

[0057] To accommodate different storage space types and usage requirements, the first and third preset thresholds for each second chamber 300 are set to different values. For example, for a second chamber 300 configured as a refrigeration compartment, the first preset threshold can be set to 2°C to 8°C, specifically 2°C, 5°C, and 8°C, and the third preset threshold can be set higher than the first preset threshold, specifically 6°C to 10°C, specifically 6°C, 8°C, and 10°C.

[0058] For the second chamber 300 configured as a freezer compartment, its first preset threshold can be set to -23℃ to -18℃, specifically -23℃, -20℃, and -18℃; its third preset threshold can be set to -5℃ to 0℃, which is higher than the first preset threshold, specifically -5℃, -3℃, and 0℃. By setting different temperature thresholds for different compartments, each second chamber 300 can independently maintain a corresponding target temperature range according to the type of items stored.

[0059] It should be noted that the specific values ​​listed above are merely illustrative examples provided to facilitate understanding of this technical solution and are not intended to limit the scope of protection of this application. The values ​​can be flexibly selected within the range defined in the claims according to actual application scenarios and needs. Values ​​other than those listed above also fall within the scope of protection of this application.

[0060] In cooling mode, the second switch 600 is closed, and the first switches 330 corresponding to the multiple second chambers 300 are all open. The airflow drive 700 is activated, driving the airflow to circulate between the first chamber 100 and the multiple second chambers 300. After the airflow passes through the evaporator 200 in the first chamber 100 for heat exchange, its temperature decreases. The cooled airflow enters the multiple second chambers 300, absorbs heat from inside the multiple second chambers 300, and its temperature rises again. It then returns to the first chamber 100 to exchange heat with the evaporator 200. This cycle repeats continuously to lower the internal temperature of the multiple second chambers 300.

[0061] Since the first preset threshold and the third preset threshold corresponding to the multiple second chambers 300 are different, the opening and closing conditions of the first switch 330 corresponding to different second chambers 300 are also different.

[0062] Specifically, for any second chamber 300, the controller acquires temperature information collected by the internal temperature sensor of the second chamber 300 and compares this temperature information with a first preset threshold corresponding to the second chamber 300. When the internal temperature of the second chamber 300 is less than or equal to its preset first threshold, that is, when the temperature of the second chamber 300 has reached the target temperature required for storing the items, the controller controls the first switch 330 corresponding to the second chamber 300 to close, cutting off the connection between the second chamber 300 and the first air duct 400 and the second air duct 500, and the second chamber 300 exits the refrigeration cycle.

[0063] At this time, the first switches 330 corresponding to the other second chambers 300 that have not yet reached their respective first preset thresholds remain open and continue to exchange heat with the evaporator 200 under the drive of the airflow drive 700 until their respective internal temperatures reach their respective first preset thresholds and then exit the refrigeration cycle in sequence.

[0064] When the internal temperature of a second chamber 300 that has exited the refrigeration cycle rises to a level higher than its corresponding third preset threshold, the controller controls the first switch 330 corresponding to the second chamber 300 to be reopened, so that the second chamber 300 is reconnected to the refrigeration circuit and the refrigeration cycle is restored.

[0065] In some embodiments, please refer to Figure 4 Unlike the above embodiments, the first chamber 100 in this embodiment has a plurality of first air inlets 110 and a plurality of first air outlets 120. The plurality of first air inlets 110 are spaced apart from each other on the cavity wall of the first chamber 100, and the plurality of first air outlets 120 are spaced apart from each other on the cavity wall of the first chamber 100.

[0066] The refrigeration equipment includes multiple first air ducts 400, multiple second air ducts 500, and multiple second chambers 300. The number of first air ducts 400, second air ducts 500, and second chambers 300 are the same, and they correspond one-to-one with each other.

[0067] Each second chamber 300 is connected to the first chamber 100 through a first air duct 400 and a second air duct 500, forming an independent airflow loop. Multiple independent airflow loops corresponding to multiple second chambers 300 share the same first chamber 100 and the evaporator 200 disposed in the first chamber 100, and are connected to the first chamber 100 in parallel.

[0068] Each second chamber 300 has a second air inlet 310 and a second air outlet 320 equipped with a first switch 330, and the first switches 330 corresponding to each second chamber 300 are independently controlled. At least one first air duct 400 is equipped with a third air inlet 410, and the corresponding second air duct 500 is equipped with a third air outlet 510.

[0069] Compared to the scheme where multiple independent circuits share a single airflow drive 700, this embodiment allows for the independent configuration of the airflow drive 700 for each circuit, which reduces the problem of uneven airflow distribution between circuits. This enables the airflow rate of each circuit to be independently adjusted according to the cooling requirements of the corresponding second chamber 300, thereby improving the timeliness and independence of the cooling response of each circuit.

[0070] In some embodiments, please refer to Figure 4 Unlike the embodiments described above, this embodiment includes two configurations of the second chamber 300. Specifically, multiple independent second chambers 300 are provided between at least one set of corresponding first air ducts 400 and second air ducts 500. That is, the second air outlets 320 of the multiple second chambers 300 are connected in parallel to the same first air duct 400, and the second air inlets 310 of the multiple second chambers 300 are connected in parallel to the same second air duct 500.

[0071] In addition to the configuration described above, which connects multiple second chambers 300 to the first chamber 100, each of the other groups of second chambers 300 is equipped with a first air duct 400 and a second air duct 500. That is, each group of first air ducts 400 and second air ducts 500 is connected to one second chamber 300 in a one-to-one correspondence, and multiple groups of second chambers 300 are connected to the first chamber 100 in parallel through their respective independent air ducts.

[0072] The coexistence of these two configurations within the same refrigeration unit allows for both flexibility and differentiation in the allocation of air duct resources. For multiple second chambers 300 with low access frequency or similar temperature requirements, the first configuration can be used, sharing the same set of first and second air ducts 400 and 500 to reduce the number of ducts and simplify the structure. For second chambers 300 with high access frequency or independent temperature requirements, the second configuration can be used, with independent air ducts ensuring their cooling response speed and temperature control accuracy. Both configurations work collaboratively; each second chamber 300 within and between groups can be independently controlled to start and stop cooling via its corresponding first switch 330, without interference.

[0073] In some examples, to further improve the evaporator 200's recirculation efficiency, the refrigeration device in this embodiment also includes a third chamber 800. The third chamber 800 is a separate compartment within the refrigeration device for housing the compressor. The compressor powers the refrigeration cycle of the refrigeration device and continuously generates heat during operation, causing the internal temperature of the third chamber 800 to rise.

[0074] The third chamber 800 is connected to the first air duct 400 through the third air inlet 410. Specifically, the third chamber 800 has an air vent on its wall, and the air vent is connected to the third air inlet 410 by a connecting pipe or direct connection, so that the airflow inside the third chamber 800 can enter the first air duct 400 through the third air inlet 410.

[0075] Compared to directly introducing ambient air for rewarming, using compressor waste heat as a heat source provides a higher airflow temperature, increasing the temperature difference between the rewarming airflow and the frost layer on the evaporator 200 surface. This accelerates the melting of the frost layer and shortens the rewarming time of the evaporator 200. Furthermore, in scenarios where the ambient temperature is low (winter ambient temperature) and the temperature difference between the ambient air and the evaporator 200 surface is insufficient to support effective rewarming, the heat generated inside the third chamber 800 by the compressor operation can still provide a sufficient temperature difference to maintain the normal operation of the rewarming function, improving the rewarming adaptability of the refrigeration equipment under different environmental conditions.

[0076] In some examples, the first air inlet 110 and the first air outlet 120 are positioned opposite each other on both sides of the evaporator 200. Specifically, the evaporator 200 is disposed inside the first chamber 100, dividing the internal space of the first chamber 100 into an air inlet side and an air outlet side. The first air inlet 110 is formed on the chamber wall of the first chamber 100 corresponding to the air inlet side, and the first air outlet 120 is formed on the chamber wall of the first chamber 100 corresponding to the air outlet side, with the first air inlet 110 and the first air outlet 120 forming opposite chamber walls of the first chamber 100.

[0077] The airflow introduced through the first air inlet 110 enters the first chamber 100, passes through the evaporator 200, and is discharged from the first air outlet 120. Since the first air inlet 110 and the first air outlet 120 are arranged opposite each other on both sides of the evaporator 200, the airflow entering the first chamber 100 can fully exchange heat with the evaporator 200, thereby improving the heat exchange and temperature recovery efficiency of the evaporator 200.

[0078] In some examples, to further accelerate the airflow speed within each independent airflow loop, an airflow drive 700 is provided inside each independent airflow loop. That is, each independent loop formed by the sequential connection of the second chamber 300, the second air duct 500, the first chamber 100, and the first air duct 400 is equipped with an airflow drive 700.

[0079] Each airflow actuator 700 is controlled independently. Specifically, each airflow actuator 700 is linked to the first switch 330 of the second chamber 300 of its corresponding circuit. When the first switch 330 corresponding to a certain second chamber 300 is open and the circuit enters the refrigeration cycle, the corresponding airflow actuator 700 of that circuit starts synchronously, driving airflow to circulate within the circuit to cool the second chamber 300. When the internal temperature of the second chamber 300 reaches its corresponding first preset threshold and the corresponding first switch 330 is closed, the corresponding airflow actuator 700 of that circuit stops operating synchronously, and the circuit exits the refrigeration cycle. The airflow actuators 700 of the other circuits can continue to operate without interfering with each other.

[0080] To further accelerate the air circulation speed during the evaporator 200's reheating process, airflow drive components 700 can be respectively installed on the first air inlet 110 side and the first air outlet 120 side of the first chamber 100. Specifically, the airflow drive component 700 on the first air inlet 110 side actively pushes external air into the first chamber 100 through the third air inlet 410 and the first air duct 400; the airflow drive component 700 on the first air outlet 120 side actively draws the air that has completed heat exchange in the evaporator 200 out to the second air duct 500, and then discharges it to the external environment through the third air outlet 510. Through the combined action of the pushing action of the airflow drive component 700 on the first air inlet 110 side and the drawing action of the airflow drive component 700 on the first air outlet 120 side, a high-speed airflow along the first direction is formed inside the first chamber 100, increasing the airflow rate flowing through the surface of the evaporator 200 per unit time and accelerating the heat exchange rate between the external air and the frost layer on the surface of the evaporator 200.

[0081] According to the second aspect of this application, referring to Figure 5 This application provides a temperature recovery method, which includes obtaining the external airflow temperature and the surface temperature of the evaporator 200 when the refrigeration equipment is shut down; and reheating the evaporator 200 when the external airflow temperature is greater than the surface temperature of the evaporator 200.

[0082] Specifically, when the user has no need to use the refrigeration equipment, the user can issue a corresponding command through the control panel or remote control of the refrigeration equipment. After receiving the command, the control module will shut down the compressor and enter the temperature recovery control process to raise the internal temperature of the first chamber 100 and the second chamber 300, so that the second chamber 300 can be used as a normal storage space.

[0083] Specifically, the ambient temperature is obtained by a temperature sensor located on the outside of the refrigeration equipment, and the surface temperature of the evaporator 200 is obtained by a temperature sensor located on the surface of the evaporator 200. When the ambient temperature is higher than the surface temperature of the evaporator 200, the evaporator 200 is warmed up by introducing ambient airflow.

[0084] After the evaporator 200 has been reheated, the second chamber 300 is reheated.

[0085] Specifically, after the refrigeration equipment ends its cooling mode and the compressor stops working, the cooling capacity generated by the evaporator 200 in cooling mode does not dissipate instantly. Because the evaporator 200 is made of metal and has a certain heat capacity, its surface temperature cannot spontaneously rise to a level equal to the ambient temperature in a short time. Therefore, in the initial stage of the warming process, the surface temperature of the evaporator 200 is still lower than the external ambient temperature, and the evaporator 200 essentially remains as a residual cold source within the refrigeration equipment during this stage.

[0086] Therefore, it is necessary to first introduce external airflow to reheat the evaporator 200. After the evaporator 200 has been reheated, the evaporator 200 is used as a heat source to reheat the second chamber 300.

[0087] Once the second chamber 300 has fully warmed up, connect the second chamber 300 to the external environment, and the refrigeration equipment will enter the ambient temperature storage mode.

[0088] Specifically, after the second chamber 300 has warmed up, it means that all the chambers inside the refrigeration equipment are close to the ambient temperature. At this time, the channel connecting the second chamber 300 to the external environment is opened, allowing external airflow to freely enter the interior of the refrigeration equipment. At this time, the refrigeration equipment can be used as a regular storage cabinet.

[0089] In some embodiments, please refer to Figure 2 The temperature recovery method includes warming the evaporator 200 when the external ambient temperature is higher than the surface temperature of the evaporator 200, including: controlling the first switch 330 to close, controlling the second switch 600 to open, controlling the airflow drive 700 to open and introducing external airflow to warm the evaporator 200.

[0090] Specifically, in the initial stage of temperature recovery after the refrigeration equipment stops working, the surface temperature Te of the evaporator 200 basically remains at the low temperature level under its refrigeration conditions, with very little change; while the internal temperature To of the second chamber 300 is greater than the surface temperature of the evaporator 200.

[0091] The second chamber 300 has a higher internal temperature, creating a significant temperature difference with the low surface temperature of the evaporator 200. If the first switch 330 of the second chamber 300 is opened to introduce external airflow into the closed loop, the external air will be forcibly cooled to a low temperature close to Te as it flows over the surface of the evaporator 200, forming a low-temperature airflow. This low-temperature airflow continues through the first switch 330 into the higher-temperature second chamber 300, where it exchanges heat with the higher-temperature air inside the second chamber 300. Essentially, this transfers the cooling capacity of the evaporator 200 to the interior of the second chamber 300, causing the temperature of the second chamber 300 to decrease instead of increase.

[0092] Meanwhile, since both the first switch 330 and the second switch 600 are in the open state, the airflow introduced by the airflow drive 700 is not all discharged along a one-way path. Some airflow will form an ineffective circulation in the closed loop: after the circulating airflow is heated by flowing through the second chamber 300 with a higher temperature, it returns to the surface of the evaporator 200. This makes the airflow temperature flowing through the surface of the evaporator 200 a low-temperature airflow that has already undergone heat exchange. As a result, the effective heat exchange temperature difference between the evaporator 200 and the flowing airflow is reduced, and the heat exchange efficiency is weakened.

[0093] Based on this, during the reheating process, the refrigeration equipment should first reheat the evaporator 200. This involves closing the first switch 330 and opening the second switch 600 to cut off the airflow path into the second chamber 300. External air then enters the first chamber 100 through the third air inlet 410 of the first air duct 400. After exchanging heat with the evaporator 200 within the first chamber 100, the air is discharged through the third air outlet 510 of the second air duct 500, ensuring that the air flowing through the evaporator 200 has a high temperature and maintaining an effective heat exchange temperature difference between the external air and the evaporator 200. Simultaneously, closing the first switch 330 shortens the airflow path into the first chamber 100, which also maintains the heat exchange airflow to some extent, achieving rapid and preferential reheating of the evaporator 200. Once the evaporator 200 has reheated, the reheating phase for the second chamber 300 begins.

[0094] In some examples, please refer to Figure 3 The process of warming up the second chamber 300 after the evaporator 200 has warmed up includes: when the difference between the temperature of the evaporator 200 and the preset temperature is less than or equal to the first preset threshold, the evaporator 200 has warmed up, the second switch 600 is closed, and the first switch 330 is opened.

[0095] Specifically, the preset temperature can be understood as the reference temperature for determining whether the evaporator 200 has sufficiently warmed up, preferably using the external ambient temperature Ta; the difference is defined as the preset temperature minus the surface temperature of the evaporator 200. Tae = Ta - Te; The smaller the Tae value, the closer the surface temperature of the evaporator 200 is to the ambient temperature, and the lower the efficiency of heat exchange between the external airflow and the evaporator 200. If Tae is less than or equal to the first preset threshold, it indicates that the evaporator 200 has completed its temperature recovery. In this embodiment, for ease of explanation, the first preset threshold is defined as Tk1.

[0096] It should be noted that, in When Tae≤Tk1, it means that the surface temperature of the evaporator 200 is close to the ambient temperature and can be used as a heat source during the reheating process of the second chamber 300; the controller controls the second switch 600 to close, blocking the channel between the external environment and the first chamber 100; and controls the first switch 330 to open, so that a closed loop is formed between the first chamber 100 and the second chamber 300.

[0097] Specifically, the airflow drive 700 drives the airflow circulation inside the closed loop, enabling the evaporator 200 to exchange heat with the second chamber 300. The airflow drive 700 drives the airflow to circulate inside the closed loop. When the airflow flows over the surface of the evaporator 200, it exchanges heat with the evaporator 200 after it has recovered its temperature. After absorbing the residual heat carried by the evaporator 200, the airflow heats up. The heated airflow continues to enter the second chamber 300 along the circulation path, releases heat inside the second chamber 300, and transfers the heat to the air and walls inside the second chamber 300, causing the temperature of the second chamber 300 to gradually rise and complete the recovery process.

[0098] In one example, please refer to Figure 2 and Figure 3 When the second switch 600 is closed and the first switch 330 is open, the internal temperature of the second chamber 300 is obtained; when the difference between the temperature of the evaporator 200 and the internal temperature of the second chamber 300 is less than or equal to a first preset threshold, the second switch 600 is controlled to open and the first switch 330 is controlled to close.

[0099] Specifically, the internal circulation of the closed loop does not complete the reheating of the second chamber 300 in one go, but may require multiple rounds of alternating processes of "internal circulation heat exchange combined with evaporator 200 heat replenishment".

[0100] During the closed-loop heat exchange process, as the airflow that flows through the surface of the evaporator 200 continuously enters the second chamber 300 and exchanges heat with its internal air and walls, the airflow temperature gradually decreases due to the release of heat. After the cooled airflow returns to the first chamber 100 through the second air duct 500, it will flow through the surface of the evaporator 200 again.

[0101] Although the evaporator 200 has completed its initial warm-up, its surface temperature may drop again due to the cumulative effect of continuous contact with the cooler return airflow, causing the temperature difference between the evaporator 200 and the second chamber 300 to narrow again. Once this temperature difference narrows to a point where it is insufficient to support effective heat exchange, maintaining the closed-loop internal circulation will make it difficult to efficiently transfer heat to the second chamber 300, and the warm-up efficiency will be significantly reduced.

[0102] Therefore, during the internal circulation process, it is necessary to monitor the temperature difference between the evaporator 200 and the second chamber 300 in real time, and switch to the external heating mode in time when the heat exchange capacity of the evaporator 200 decreases, so as to reheat the evaporator 200 and maintain the efficiency of the overall reheating process.

[0103] During the closed-loop heat exchange process where the second switch 600 is closed and the first switch 330 is open, the internal temperature To of the second chamber 300 and the surface temperature Te of the evaporator 200 are obtained; the difference between Te and To is calculated, i.e., ΔTeo = Te - To.

[0104] The larger ΔTeo is, the greater the temperature difference between the surface temperature of the evaporator 200 and the internal temperature of the second chamber 300, and the higher the heat exchange efficiency of the airflow flowing through the second chamber 300 across the surface of the evaporator 200. The smaller ΔTeo is, the closer the surface temperature of the evaporator 200 is to the temperature of the second chamber 300, the smaller the effective heat exchange temperature difference between the evaporator 200 and the circulating airflow, and the lower the efficiency of internal circulating heat exchange.

[0105] Specifically, when ΔTeo≤Tk1, the surface temperature of the evaporator 200 is close to the temperature of the second chamber 300. At this point, the effective heat exchange temperature difference between the surface of the evaporator 200 and the circulating airflow is significantly reduced, and the evaporator 200 can no longer effectively provide heat.

[0106] When ΔTeo≤Tk1, the second switch 600 is opened and the first switch 330 is closed. After the second switch 600 is opened, the connection path between the air duct and the external environment is reopened. Driven by the airflow drive 700, the external ambient air is introduced into the first chamber 100 via the second switch 600. When the external airflow flows over the surface of the evaporator 200, it undergoes forced convection heat exchange with the lower-temperature evaporator 200. The external air transfers its own heat to the evaporator 200, causing the surface temperature of the evaporator 200 to gradually rise.

[0107] During the reheating process of evaporator 200, the controller continuously monitors the change of surface temperature Te of evaporator 200; when the difference between surface temperature Te of evaporator 200 and preset temperature is less than or equal to the first preset threshold Tk1, it is determined that evaporator 200 has completed the temperature recovery.

[0108] In one example, please refer to Figure 4 When the second switch 600 is closed and the first switch 330 is open, the internal temperature of the second chamber 300 is obtained; when the difference between the temperature of the evaporator 200 and the internal temperature of the second chamber 300 is greater than a first preset threshold and the difference between the internal temperature of the second chamber 300 and the preset temperature is greater than a second preset threshold, the closing time of the second switch 600 is obtained.

[0109] Specifically, the surface temperature Te of the evaporator 200 and the internal temperature To of the second chamber 300 are obtained, and ΔTeo = Te - To is calculated. It is then determined whether the difference is greater than a first preset threshold Tk1. When ΔTeo > Tk1, it indicates that the surface temperature of the evaporator 200 is still higher than the internal temperature of the second chamber 300, and there is a certain temperature difference between the two. The evaporator 200 can still exchange heat with the second chamber 300, maintaining the heat exchange cycle inside the closed loop.

[0110] The internal temperature To of the second chamber 300 is obtained, and the difference between To and the preset temperature ΔTao = Ta - To is calculated. It is then determined whether this difference is greater than the second preset threshold Tk2. When ΔTao > Tk2, it indicates that there is a large deviation between the internal temperature of the second chamber 300 and the ambient temperature, and the second chamber 300 has not yet completed its temperature recovery.

[0111] When the above two temperature difference judgment conditions are met simultaneously, that is, the difference ΔTeo between the surface temperature of the evaporator 200 and the internal temperature of the second chamber 300 is greater than the first preset threshold Tk1, and the difference ΔTao between the outdoor ambient temperature and the internal air temperature of the second chamber 300 is greater than the second preset threshold Tk2, the forced convection heat exchange cycle inside the second chamber 300 is in a working state with low heat exchange efficiency.

[0112] In the above situation, the duration toff of the second switch 600 remaining closed in the current cycle is obtained. It is determined whether this closing time is greater than or equal to a preset time ts; if toff ≥ ts, it indicates that the closing time of the second switch 600 is relatively long and the surface temperature of the evaporator 200 is relatively low, which can meet the requirements for heat exchange with the second chamber 300, but the efficiency is too low.

[0113] When ΔTeo > Tk1, ΔTao > Tk2, and tof ≥ ts, the second switch 600 is opened, re-establishing the connection between the air duct and the external environment. Driven by the airflow drive component 700, the external airflow is introduced into the first chamber 100 via the second switch 600. The external airflow flows over the surface of the evaporator 200, exchanging heat with it and reheating the evaporator 200.

[0114] Specifically, during the closed-loop internal circulation phase in the warm-up mode, the closing time of the second switch 600 needs to be reset from the moment the second switch 600 closes each time, rather than accumulating the historical closing time. That is, whenever the second switch 600 switches from the on state to the off state, the closing time toff of the second switch 600 is reset to zero and recalculated.

[0115] During the internal circulation process, there are two situations that trigger the second switch 600 to open: when the closing time toff of the second switch 600 is greater than or equal to the preset time ts, it indicates that the closed loop internal circulation has lasted for a long time, and the temperature of the evaporator 200 has decayed under the cumulative effect of continuous contact with the cooling return airflow, which no longer meets the requirements of efficient heat exchange and temperature recovery. The second switch 600 is then controlled to open, and external air is introduced to force heat replenishment to the evaporator 200. The closing time toff of the second switch 600 is then reset to zero.

[0116] When ΔTeo≤Tk1, it indicates that the temperature difference between the evaporator 200 and the second chamber 300 has been reduced to a level that is insufficient to support effective heat exchange. The heat exchange driving force of the evaporator 200 is insufficient. At this time, the second switch 600 is also controlled to open, and external air is introduced to supplement the heat of the evaporator 200. The previously recorded closing time toff of the second switch 600 is also cleared to zero.

[0117] After the second switch 600 is turned on, external heat replenishment is completed, and the second switch 600 is turned off again, the closing time (toff) of the second switch 600 restarts from zero, entering the next monitoring cycle. Through the coordinated action of the above two triggering conditions, timely heat replenishment is maintained when the heat exchange capacity of the evaporator 200 is insufficient, while the timed forced heat replenishment mechanism limits excessive temperature decay of the evaporator 200 during long-term internal circulation. The two complement each other, ensuring that the evaporator 200 maintains good heat exchange capacity throughout the entire second chamber 300 reheating phase.

[0118] During the heat replenishment process of evaporator 200, the change in the surface temperature Te of evaporator 200 is continuously monitored. When Tae≤Tk1, it is determined that the evaporator 200 has completed the reheating process. The second switch 600 is then closed, and the airflow circulation inside the closed loop is restarted to reheat the second chamber 300.

[0119] In one embodiment, there are multiple second chambers 300, and the multiple second chambers 300 are independent of each other; each second chamber 300 is provided with a first switch 330 and is connected to the first chamber 100 through at least one air duct; the internal temperature of each second chamber 300 is acquired; when the internal temperature of any second chamber 300 is less than or equal to a third preset threshold, the first switch 330 of the second chamber 300 is controlled to open; when the internal temperature of any second chamber 300 is greater than the third preset threshold, the first switch 330 of the second chamber 300 is controlled to close.

[0120] Before the refrigeration unit enters the warm-up mode, the internal temperatures of each of the second chambers 300 may differ significantly when refrigeration stops due to factors such as different refrigeration setting temperatures, different usage frequencies, or different number of door openings. For example, in a cabinet refrigerator containing multiple refrigerator and / or freezer compartments, some freezer compartments are set to lower temperatures and continuously refrigerate in refrigeration mode, resulting in lower internal temperatures; while some refrigerator compartments may be set to higher temperatures due to prolonged opening and closing, depending on their different storage needs. Therefore, in the initial stage of warm-up, there is a "temperature difference" between the multiple second chambers 300.

[0121] It should be noted that during the warm-up phase of the second chamber 300, the evaporator 200 is always at a higher temperature relative to each of the second chambers 300, and heat is continuously transferred to each of the second chambers 300 through airflow circulation to increase the internal temperature of each of the second chambers 300.

[0122] However, when multiple second chambers 300 with different temperatures are connected in parallel to the same closed loop through the air duct and participate in internal circulation heat exchange at the same time; the airflow drive 700 drives the airflow to circulate in the closed loop. The airflow first flows over the surface of the evaporator 200, exchanges heat with the evaporator 200 with a higher temperature, absorbs heat and rises in temperature; the heated airflow enters each of the open second chambers 300 in sequence along the air inlet side air duct.

[0123] When the airflow enters the second chamber 300 (freezing chamber), which has a lower internal temperature, a large temperature difference exists between the airflow and the chamber. The heat carried by the airflow is largely absorbed by the low-temperature chamber, causing the airflow's own temperature to drop significantly. This results in the airflow reaching a lower temperature on the surface of the evaporator 200.

[0124] At this point, since the airflow temperature has been significantly lowered after passing through the low-temperature chamber, the airflow temperature may already be lower than the internal temperature of the high-temperature chamber (refrigeration chamber). Instead of transferring heat to the high-temperature chamber to help it warm up, the airflow will absorb heat from the inside of the high-temperature chamber, causing the internal temperature of the high-temperature chamber to drop further.

[0125] Based on the above issues, if all second chambers 300 with different temperatures are simultaneously included in the internal heat exchange path when multiple second chambers 300 are connected in parallel to the same closed heat exchange loop, it will lead to an imbalance in the distribution of cooling capacity. Therefore, it is necessary to perform phased warming based on the real-time internal temperature of each second chamber 300: prioritize the warming of the second chambers 300 with lower internal temperatures, and only after the internal temperature of the low-temperature chambers has risen to a temperature that will not cause cooling capacity loss to other chambers, then gradually connect the remaining chambers to the heat exchange loop.

[0126] During the closed loop internal circulation phase when the second switch 600 is closed and the first switch 330 is open, the controller acquires the internal temperature To of each second chamber 300 and distinguishes them according to the temperature between each different second chamber 300.

[0127] In this embodiment, the third preset threshold is defined as Ti. The controller compares the internal temperature To of each second chamber 300 with Ti, and performs differentiated control on the first switch 330 corresponding to the second chamber 300 based on the comparison result.

[0128] Specifically, if the internal temperature To of a certain second chamber 300 is less than or equal to Ti, it indicates that the current temperature of the chamber is low and it is a low-temperature chamber. The corresponding first switch 330 is then turned on to connect the chamber to a closed loop for heat exchange. If the internal temperature To of a certain second chamber 300 is greater than Ti, it indicates that the temperature of the chamber is high. The corresponding first switch 330 is then turned off to temporarily prevent the chamber from being connected to the circulation loop.

[0129] In one embodiment, please refer to Figure 5 The internal temperature of each second chamber 300 is obtained; when the internal temperature of each second chamber 300 is greater than the third preset threshold, the first switch 330 of the multiple second chambers 300 is turned on.

[0130] Based on the centralized rewarming of the low-temperature chambers, the controller acquires the internal temperature To of each second chamber 300 in real time. When it is detected that the internal temperature of all previously low-temperature chambers has risen above the third preset threshold Ti, it indicates that the temperature of these previously cold chambers has risen to a level comparable to that of the other high-temperature chambers, and there is no longer a significant temperature difference between the second chambers 300. At this time, the controller controls the first switch 330 of the previously isolated, higher-temperature second chambers 300 to open, so that all second chambers 300 are connected to a closed loop and collectively rewarm through the evaporator 200.

[0131] The low-temperature chamber has a relatively low temperature. If the high-temperature chamber is simultaneously connected to the circuit, the airflow passing through the low-temperature chamber will be cooled, causing a reverse cooling effect on the high-temperature chamber. Therefore, during the 300°C reheating process of multiple second chambers, the high-temperature chamber is first isolated, and the low-temperature chamber is heated centrally. Once the temperature of the low-temperature chamber catches up with that of the high-temperature chamber and both exceed Ti, the risk of reverse cooling is eliminated. At this point, the high-temperature chamber is also connected to the circuit, and all chambers participate in the circulating heat exchange, which can improve the overall reheating rate.

[0132] In one embodiment, please refer to Figure 5 and Figure 6 The internal temperature of each second chamber 300 is obtained; if the internal temperature of any second chamber 300 is less than or equal to a third preset threshold, the second chamber 300 is a freezer compartment; if the internal temperature of any second chamber 300 is greater than the third preset threshold, the second chamber 300 is a refrigerator compartment; the internal temperature of the freezer compartment is obtained; if the difference between the internal temperature of each freezer compartment and the preset temperature is less than or equal to the second preset threshold, the first switch 330 of the freezer compartment is controlled to close, and the first switch 330 of the refrigerator compartment is controlled to open.

[0133] The controller acquires the internal temperature To of each second chamber 300 and compares To with a third preset threshold Ti to distinguish whether the second chamber 300 belongs to the freezer compartment or the refrigerator compartment.

[0134] If the internal temperature To of any second chamber 300 is less than or equal to a third preset threshold Ti, that second chamber 300 is determined to be a freezer chamber. In cooling mode, the temperature of a freezer chamber is typically much lower than that of a refrigerator chamber, and its internal temperature rises slowly after cooling stops, remaining at a low level during the initial warm-up phase. If the internal temperature To of any second chamber 300 is greater than the third preset threshold Ti, that second chamber 300 is determined to be a refrigerator chamber. The refrigerator chamber has a higher cooling set temperature, and its temperature is closer to ambient temperature than that of the freezer chamber after cooling stops.

[0135] Unlike the previous embodiment, the second chamber 300 is divided into a freezer chamber and a refrigerator chamber; the internal temperature of the corresponding freezer chamber and refrigerator chamber is obtained; during the warming process of multiple second chambers 300, the freezer chamber is warmed first; during the warming process of the freezer chamber, the first switch 330 corresponding to the refrigerator chamber is turned off.

[0136] When the difference between the internal temperature of each freezer compartment and the preset temperature is less than the second preset threshold Tk2, it indicates that all freezer compartments have completed the temperature recovery process and the freezer compartments no longer pose a threat to the coldness of other compartments.

[0137] At this time, the controller controls the first switch 330 of each freezer compartment to close, disconnecting it from the closed loop, and at the same time controls the first switch 330 of each refrigerator compartment to open, connecting the refrigerator compartment to the closed loop and starting the rewarming process of the refrigerator compartment.

[0138] It should be noted that in some embodiments, there are multiple second chambers 300, and the multiple second chambers 300 are spaced apart from each other. The multiple second chambers 300 are connected in parallel between the same first air duct 400 and the same second air duct 500.

[0139] Specifically, the first air duct 400 has one air inlet and multiple air outlet branches. The air inlet of the first air duct 400 is connected to the air outlet side of the first chamber 100, and the multiple air outlet branches of the first air duct 400 are connected to the air inlets of each of the second chambers 300. The second air duct 500 has multiple air inlet branches and one air outlet. The multiple air inlet branches of the second air duct 500 are connected to the air outlets of each of the second chambers 300, and the air outlet of the second air duct 500 is connected to the return air side of the first chamber 100. In other words, the first air duct 400 is simultaneously connected to the air inlets of multiple second chambers 300, forming an air inlet path that branches out into multiple paths; the second air duct 500 is simultaneously connected to the air outlets of multiple second chambers 300, forming a return air path that converges into one path. The first chamber 100, the first air duct 400, multiple second chambers 300 and the second air duct 500 are connected end to end in sequence to form a closed loop.

[0140] Each second chamber 300 is equipped with a first switch 330 at its air inlet and air outlet. The first switches 330 corresponding to each of the multiple second chambers 300 are independently controlled, so that each second chamber 300 can be independently connected to or disconnected from the first air duct 400 and the second air duct 500.

[0141] Multiple second chambers 300 can be allocated into different types of storage spaces according to actual usage needs. Optionally, some second chambers 300 are configured as refrigerated compartments for storing items that require refrigeration and preservation; some second chambers 300 are configured as freezer compartments for storing items that require freezing and preservation.

[0142] Unlike the connection method described above, in another embodiment, the first chamber 100 has multiple air inlets and multiple air outlets. The multiple air inlets are spaced apart from each other on the cavity wall of the first chamber 100, and the multiple air outlets are spaced apart from each other on the cavity wall of the first chamber 100.

[0143] The refrigeration equipment includes multiple first air ducts 400, multiple second air ducts 500, and multiple second chambers 300. The number of first air ducts 400, second air ducts 500, and second chambers 300 are the same, and they correspond one-to-one with each other.

[0144] Specifically, each second chamber 300 is connected to the first chamber 100 via a first air duct 400 and a second air duct 500, forming an independent airflow loop. One end of each first air duct 400 is connected to a corresponding air outlet on the first chamber 100, and the other end is connected to the corresponding air inlet of the second chamber 300; one end of each second air duct 500 is connected to the corresponding air outlet of the second chamber 300, and the other end is connected to a corresponding air inlet on the first chamber 100. Each second chamber 300 has a set of first air ducts 400 and second air ducts 500 dedicated to that chamber between it and the first chamber 100. Multiple independent airflow loops share the same first chamber 100 and the evaporator 200 disposed within the first chamber 100, and are connected to the first chamber 100 in parallel.

[0145] In some embodiments, please refer to Figure 5 , Figure 6 and Figure 8 In the temperature recovery mode, the temperature difference between the evaporator 200 and the preset temperature is Tk1, and Tk1 is preset to be between 1°C and 3°C; specifically, it can be 1°C, 2°C, or 3°C. When the temperature difference ΔTae between the surface temperature Te of the evaporator 200 and the preset temperature Ta is less than or equal to Tk1, the temperature recovery of the evaporator 200 is determined to be complete. The temperature difference between the internal temperature To of the second chamber 300 and the preset temperature Ta is Tk2, and Tk2 is preset to be between 3°C and 8°C; specifically, it can be 3°C, 5°C, or 8°C. When the temperature difference ΔTao between the internal temperature To of any second chamber 300 and the preset temperature is less than or equal to Tk2, the temperature recovery of that second chamber 300 is determined to be complete.

[0146] Where Tk1 < Tk2, for example, Tk1 is 2℃ and Tk2 is 5℃.

[0147] In the temperature recovery mode, the third preset threshold Ti used to distinguish between the low-temperature chamber and the high-temperature chamber can be set to -2℃ to 3℃, specifically -2℃, 0℃, or 3℃. Taking Ti as 0℃ as an example, the corresponding temperature of the freezer compartment should be less than 0℃; while the internal temperature of the refrigerator compartment should be greater than 0℃.

[0148] During normal use, the freezer compartment typically maintains a temperature of around -10°C in cooling mode, and its internal temperature remains significantly lower than the refrigerator compartment even after cooling stops. If both the freezer and refrigerator compartments are connected to a closed circuit, the airflow passing through the freezer compartment will be significantly cooled, causing a reverse cooling effect on the refrigerator compartment. Therefore, it is necessary to perform separate warming operations for the freezer and refrigerator compartments.

[0149] For example, in this embodiment, the preset temperature Ta is set to 25°C, Tk1 is set to 2°C, Tk2 is set to 5°C, and the third preset threshold Ti is set to 0°C. When cooling stops, the surface temperature Te of the evaporator 200 is set to -20°C, the temperature Tod of the freezer compartment is set to -18°C, the temperature Toc1 of the refrigerator compartment 1 is approximately 3°C, the temperature Toc2 of the refrigerator compartment 2 is approximately 7°C, and the temperature Toc3 of the refrigerator compartment 3 is approximately 10°C.

[0150] After the temperature recovery begins, the evaporator 200 first enters the priority temperature recovery stage. At this time, the first switch 330 is closed, the second switch 600 is open, and the airflow drive 700 introduces outside air into the first chamber 100. The outside air flows through the surface of the evaporator 200 for forced convection heat exchange before being discharged. This continues until the surface temperature Te of the evaporator 200 rises to 23°C, at which point the temperature recovery of the evaporator 200 is complete.

[0151] After the evaporator 200 has warmed up, the second chamber 300 begins to warm up. Since the temperature Tod in the freezer compartment is lower than that in the refrigerator compartment, and Tod = -18℃ < Ti = 0℃, this low-temperature chamber is determined to be the freezer compartment and needs to be warmed up first. At this time, all the first switches 330 in the refrigerator compartment are closed, and only the freezer compartment is connected to the closed loop. The airflow drive 700 drives the airflow circulation within the closed loop. After the airflow passes over the surface of the evaporator 200 and undergoes heat exchange, its temperature rises. The heated airflow enters the freezer compartment, transferring heat to the air and walls inside the freezer compartment, causing the temperature of the freezer compartment to gradually rise.

[0152] During the temperature recovery process, the surface temperature Te of the evaporator 200 and the freezer compartment temperature Tod are monitored in real time. As heat exchange continues, the surface temperature of the evaporator 200 gradually decreases, while the freezer compartment temperature gradually increases. For example, during heat exchange, when the surface temperature of the evaporator 200 drops to 0°C and the freezer compartment temperature rises to -2°C, the temperature difference between the evaporator 200 surface temperature and the freezer compartment internal temperature is only 2°C, which is relatively small. Under these circumstances, the surface heat of the evaporator 200 is insufficient to effectively raise the temperature of the freezer compartment, and the efficiency of maintaining internal circulation is significantly reduced, requiring reheating of the evaporator 200.

[0153] At this time, the second control switch 600 is turned on, and the airflow drive component 700 introduces outside air into the first chamber 100. The outside air flows over the surface of the evaporator 200 for forced convection heat exchange, reheating the evaporator 200. When the surface temperature of the evaporator 200 rises to a value less than Tk1 compared to the ambient temperature, the reheating of the evaporator 200 is complete. The second control switch 600 is then turned off, restoring the closed-loop internal circulation and continuing to utilize the surface heat of the evaporator 200 to warm the freezer compartment. This internal circulation and evaporator 200 reheating alternate until the freezer compartment temperature Tod rises to 20°C, completing the freezer compartment warming process.

[0154] After the freezer compartment has warmed up, the first switch 330 corresponding to the freezer compartment is turned off, disconnecting it from the closed circuit. The first switches 330 of all refrigerator compartments are turned on, connecting all refrigerator compartments to the closed circuit, and they all warm up together through the evaporator 200.

[0155] The airflow drive 700 drives the airflow to circulate in a closed loop. After the airflow passes over the surface of the evaporator 200 and heats up, it sequentially enters each refrigerator compartment to release heat, causing the temperature of each refrigerator compartment to gradually rise. During this process, the surface temperature of the evaporator 200 is monitored in real time. When the temperature difference between the surface temperature of the evaporator 200 and the lowest temperature in each refrigerator compartment is too small, and the heat exchange efficiency is insufficient, the second switch 600 is turned on to introduce external air to supplement the heat of the evaporator 200. After the supplementary heating is completed, the second switch 600 is turned off and the internal circulation continues. This process is repeated alternately. When the temperature of each refrigerator compartment rises to Toc1≥20℃, Toc2≥20℃, and Toc3≥20℃, the refrigerator compartment temperature recovery is complete. At this point, the temperature recovery of all second chambers 300 is complete, all dampers remain open, the fans are turned off, and the entire unit enters the normal temperature cabinet mode.

[0156] In one embodiment, please refer to Figure 6 The temperature of the refrigerator compartment and the freezer compartment is obtained; if the difference between the internal temperature of all refrigerator compartments and the preset temperature is less than the second preset threshold, it is determined that the 300°C rewarming of all second chambers is complete.

[0157] Each first switch 330 and second switch 600 is kept on while each airflow drive 700 is turned off, thus switching the refrigeration equipment to ambient temperature cabinet mode.

[0158] The controller acquires the internal temperature of each refrigerator compartment and freezer compartment, and compares the internal temperature of each second chamber 300 with a preset temperature. If the difference between the internal temperature of all refrigerator and freezer compartments and the preset temperature is less than the second preset threshold Tk2, it is determined that the temperature recovery of all second chambers 300 is complete.

[0159] Once the temperature has fully recovered, the controller keeps each first switch 330 and second switch 600 open, and closes each airflow drive component 700. At this time, each compartment is connected to the first air duct 400 and second air duct 500 via the open first switch 330, and the first air duct 400 and second air duct 500 are connected to the external environment via the open second switch 600. A natural ventilation path is formed between the cabinet interior and the external environment, allowing outside air to freely enter and exit the cabinet, removing residual moisture and replenishing with fresh air. The refrigeration equipment then switches to a normal temperature cabinet mode, allowing it to be used as a regular storage cabinet without developing odors or mold due to prolonged sealing.

[0160] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0161] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0162] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0163] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A refrigeration device, characterized in that, include: The first chamber (100) has a first air inlet (110) and a first air outlet (120). An evaporator (200) is disposed within the first chamber (100); The second chamber (300) has a second air inlet (310) and a second air outlet (320), and both the second air inlet (310) and the second air outlet (320) are equipped with a first switch (330); The first air duct (400) is connected to the first air inlet (110) and the second air outlet (320) respectively; the first air duct (400) is provided with a third air inlet (410). The second air duct (500) is connected to the first air outlet (120) and the second air inlet (310) respectively; the second air duct (500) is provided with a third air outlet (510); both the third air inlet (410) and the third air outlet (510) are provided with a second switch (600); An airflow drive (700) is used to drive airflow from the third air inlet (410) through the first chamber (100) to the third air outlet (510) when the second switch (600) is open and the first switch (330) is closed. The airflow temperature introduced through the third air inlet (410) is greater than the internal temperature of the first chamber (100).

2. The refrigeration equipment according to claim 1, characterized in that, The second chamber (300) is multiple and separated from each other, and the multiple second chambers (300) are connected in parallel between the first air duct (400) and the second air duct (500); The second air outlet (320) of each second chamber (300) is connected to the first air duct (400), and the second air inlet (310) of each second chamber (300) is connected to the second air duct (500).

3. The refrigeration equipment according to claim 1, characterized in that, The first chamber (100) has a plurality of first air inlets (110) and a plurality of first air outlets (120). The refrigeration equipment includes a plurality of first air ducts (400), a plurality of second air ducts (500), and a plurality of second chambers (300). Each first air duct (400) is connected to a first air inlet (110), and each second air duct (500) is connected to a first air outlet (120). Each second chamber (300) is connected to a first air duct (400) and a second air duct (500).

4. The refrigeration equipment according to claim 3, characterized in that, At least one set of corresponding first air duct (400) and second air duct (500) are provided with a plurality of independent second chambers (300); the second air outlet (320) of each second chamber (300) is connected to the first air duct (400), and the second air inlet (310) of each second chamber (300) is connected to the second air duct (500).

5. The refrigeration equipment according to any one of claims 1 to 4, characterized in that, The refrigeration equipment also includes a third chamber (800), in which a compressor is installed, and the third chamber (800) is connected to the first air duct (400) through the third air inlet (410); When the compressor is working, the internal temperature of the third chamber (800) is greater than or equal to the internal temperature of the first chamber (100).

6. The refrigeration equipment according to claim 5, characterized in that, The first air inlet (110) and the first air outlet (120) are disposed opposite to each other on both sides of the evaporator (200) so that the airflow introduced through the first air inlet (110) passes through the evaporator (200) and is discharged from the first air outlet (120).

7. The refrigeration equipment according to claim 5, characterized in that, The airflow drive unit (700) is in multiple sets; At least one set of the airflow driving components (700) is disposed in the second air duct (500) near the first air outlet (120) for driving airflow back from the second chamber (300) to the first chamber (100). At least one set of the airflow drive unit (700) is disposed in the first air duct (400) and located between the first air inlet (110) and the third air outlet (510) for driving airflow into the second chamber (300) and / or exhausting it to the outside.

8. A method for restoring temperature, characterized in that, Applied to the refrigeration equipment according to any one of claims 1 to 7, the temperature recovery method includes the following steps: When the refrigeration equipment is not in use, the external airflow temperature and the surface temperature of the evaporator (200) are obtained; When the external airflow temperature is greater than the surface temperature of the evaporator (200), the evaporator (200) is reheated; After the evaporator (200) has completed its rewarming process, the second chamber (300) is rewarmed. Once the second chamber (300) has fully warmed up, the second chamber (300) is connected to the external environment, and the refrigeration equipment enters a normal temperature storage mode.

9. The temperature recovery method according to claim 8, characterized in that, When the ambient temperature is higher than the surface temperature of the evaporator (200), the process of warming up the evaporator (200) includes: Control the first switch (330) to close, control the second switch (600) to open, control the airflow drive (700) to open and introduce external airflow to reheat the evaporator (200).

10. The temperature recovery method according to claim 9, characterized in that, After the evaporator (200) has been reheated, the second chamber (300) is reheated, which includes: When the temperature difference between the evaporator (200) and the preset temperature is less than or equal to the first preset threshold, the evaporator (200) completes its temperature recovery, controls the second switch (600) to close, and controls the first switch (330) to open. The airflow is driven by the airflow drive (700) to circulate the airflow inside the first chamber (100) and the second chamber (300), so that the evaporator (200) and the second chamber (300) can exchange heat.

11. The temperature recovery method according to claim 10, characterized in that, After the evaporator (200) has been reheated, the second chamber (300) is reheated, which includes: When the second switch (600) is closed and the first switch (330) is open, the internal temperature of the second chamber (300) is obtained; When the difference between the temperature of the evaporator (200) and the internal temperature of the second chamber (300) is less than or equal to a first preset threshold, and the difference between the internal temperature of the second chamber (300) and the preset temperature is greater than a second preset threshold, the second switch (600) is controlled to open, and the first switch (330) is controlled to close. External airflow is introduced into the first chamber (100) by the airflow drive (700), and the external airflow is discharged from the first chamber (100) after exchanging heat with the evaporator (200). Once the evaporator (200) has completed its reheating process, the second switch (600) is turned off.

12. The temperature recovery method according to claim 10, characterized in that, After the evaporator (200) has been reheated, the second chamber (300) is reheated, which includes: When the second switch (600) is closed and the first switch (330) is open, the internal temperature of the second chamber (300) is obtained; When the difference between the temperature of the evaporator (200) and the internal temperature of the second chamber (300) is greater than a first preset threshold, and the difference between the internal temperature of the second chamber (300) and the preset temperature is greater than a second preset threshold, the closing time of the second switch (600) is obtained; If the closing time of the second switch (600) is greater than or equal to a preset time, the second switch (600) is controlled to open; External airflow is introduced into the first chamber (100) by the airflow drive (700), and the external airflow is discharged from the first chamber (100) after exchanging heat with the evaporator (200). When the evaporator (200) has completed its reheating process, the second switch (600) is turned off, and the first switch (330) is also turned off. When the second switch (600) is open, the closing time of the second switch (600) is reset to zero and recalculated; Wherein, the first preset threshold is less than the second preset threshold.

13. The temperature recovery method according to claim 9, characterized in that, There are multiple second chambers (300), and the multiple second chambers (300) are independent of each other; The rewarming of multiple second chambers (300) includes the following steps: Obtain the internal temperature of each of the second chambers (300); When the internal temperature of any of the second chambers (300) is less than or equal to a third preset threshold, the first switch (330) of the second chamber (300) is opened. If the internal temperature of any of the second chambers (300) is greater than a third preset threshold, the first switch (330) controlling the second chamber (300) is closed.

14. The temperature recovery method according to claim 13, characterized in that, The rewarming of multiple second chambers (300) includes the following steps: Obtain the internal temperature of each of the second chambers (300); When the internal temperature of each of the second chambers (300) is greater than the third preset threshold, the first switch (330) controlling the multiple second chambers (300) is turned on.

15. The temperature recovery method according to claim 13, characterized in that, The rewarming of multiple second chambers (300) includes the following steps: Obtain the internal temperature of each of the second chambers (300); If the internal temperature of any of the second chambers (300) is less than or equal to a third preset threshold, the second chamber (300) is a freezer chamber; If the internal temperature of any of the second chambers (300) is greater than a third preset threshold, the second chamber (300) is a cold storage room; Obtain the internal temperature of each of the aforementioned freezer compartments; When the difference between the internal temperature of each freezer compartment and the preset temperature is less than or equal to the second preset threshold, the first switch (330) of the freezer compartment is closed, and the first switch (330) of the refrigerator compartment is opened.

16. The temperature recovery method according to claim 15, characterized in that, The method for restoring the temperature of the plurality of said cold storage compartments includes: Obtain the internal temperature of each of the aforementioned cold storage compartments; When the difference between the internal temperature of the cold storage compartment and the preset temperature is less than or equal to the second preset threshold, the first switch (330) of the cold storage compartment is controlled to close.

17. The temperature recovery method according to claim 16, characterized in that, Obtain the temperatures of the refrigeration compartment and the freezer compartment; If the difference between the internal temperature of all the refrigerated compartments and the frozen compartments and the preset temperature is less than the second preset threshold, it is determined that the rewarming of all the second chambers (300) is complete; By controlling each of the first switch (330) and the second switch (600) to remain in the open state and controlling each airflow drive (700) to be closed, the refrigeration equipment switches to the normal temperature storage mode.

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