Variable temperature control method of refrigeration equipment, controller and refrigeration equipment

Abstract

The invention discloses a variable temperature control method of refrigeration equipment, a controller and the refrigeration equipment thereof.The variable temperature chamber is provided with a movable tray and a lower-layer drawer used for storing food materials, and in a first refrigeration mode, cold air is conveyed to the upper space of a micropore cover plate through an air duct assembly, but the cold air is not conveyed to the movable tray and the lower-layer drawer; in the first refrigeration mode, cold air is conveyed to the upper space of the microporous cover plate and the inner space of the lower drawer through the air duct assembly, in the second refrigeration mode, the movable tray is in the refrigeration high-humidity state, the lower drawer is in the refrigeration low-humidity state, and in the freezing mode, the movable tray and the lower drawer are in the refrigeration low-humidity state. Cold air is conveyed to the upper space of the micropore cover plate and the inner space of the lower-layer drawer through the air duct assembly, so that the movable tray is in a frozen high-humidity state, and the lower-layer drawer is in a frozen low-humidity state; by means of the different modes, fresh-keeping storage of various types of food materials is achieved, and the fresh-keeping requirement of a user for the food materials is met.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration and preservation, and particularly relates to a variable temperature control method, a controller and a refrigeration device for a refrigeration device. Background Art

[0002] In order to meet the user's requirements for refrigerating and freezing food materials, in the related art, a drawer suitable for a wide-range variable temperature function is provided in the refrigerator. The wide-range variable temperature function can adjust the temperature environment of the drawer, so as to provide the user with a flexible refrigerating and freezing switching function. For example, when the user stores fruit and vegetable food materials in the drawer, the wide-range variable temperature function can be set to the refrigerating mode, so that the fruit and vegetable food materials can be stored in the above-zero temperature range. When the user stores meat food materials in the drawer, the wide-range variable temperature function can be set to the freezing mode, so that the meat food materials can be stored in the below-zero temperature range.

[0003] At present, the drawers applying the wide-range variable temperature function are generally closed drawers to ensure the humidity environment of the food materials in the drawer. However, when the refrigerating mode is switched to the freezing mode in the closed drawer, it is difficult for the cold air outside the drawer to exchange heat with the air inside the drawer, the freezing speed of the food materials is slow, and the humidity level inside the drawer is not considered, which affects the freshness preservation effect of the food materials. Summary of the Invention

[0004] The embodiments of the present application provide a variable temperature control method, a controller and a refrigeration device for a refrigeration device, which improve the air flow in the variable temperature chamber and realize the humidity control of the variable temperature chamber.

[0005] In a first aspect, the embodiments of the present application provide a variable temperature control method for a refrigeration device. A variable temperature chamber is provided in the refrigeration device. The variable temperature chamber includes a variable temperature air duct, a microporous cover plate, a movable tray and a lower drawer. The microporous cover plate is arranged above the movable tray. The movable tray is arranged above the lower drawer and leaves an air return opening of the lower drawer. The variable temperature air duct includes an air duct assembly, a wind blocking assembly, a first air outlet and a second air outlet. The first air outlet communicates with the upper space of the microporous cover plate. The second air outlet communicates with the internal space of the lower drawer;

[0006] The variable temperature control method includes:

[0007] In a first refrigerating mode, controlling the wind blocking assembly to close the second air outlet, and controlling the air duct assembly to control the temperature of the variable temperature chamber through the first air outlet and a preset first refrigerating temperature range;

[0008] In a second refrigerating mode, controlling the wind blocking assembly to open the second air outlet, and controlling the air duct assembly to control the temperature of the variable temperature chamber through the first air outlet, the second air outlet and a preset second refrigerating temperature range;

[0009] In the refrigeration mode, control the windshield assembly to open the second air outlet, and control the air duct assembly to control the temperature of the variable temperature chamber through the first air outlet, the second air outlet and a preset refrigeration temperature range.

[0010] In some embodiments, a baffle is provided at the front of the movable tray, and the baffle extends towards the lower drawer to block the air return opening of the lower drawer. The baffle is provided with a moisture preservation component so that the air return flow of the lower drawer is sent out through the moisture preservation component.

[0011] In some embodiments, an upper ventilation opening is provided above the micro-hole cover plate, and a lower ventilation opening is provided in the lower drawer. The first air outlet is docked with the upper ventilation opening; the second air outlet is docked with the lower ventilation opening.

[0012] In some embodiments, the windshield assembly includes a windshield and a driving mechanism. The rotating shaft of the driving mechanism is connected to the windshield to control the windshield to open or close the second air outlet.

[0013] In some embodiments, the control of the air duct assembly to control the temperature of the variable temperature chamber through the first air outlet and a preset first refrigeration temperature range includes:

[0014] When the current temperature of the variable temperature chamber is higher than the upper limit temperature of the first refrigeration temperature range, control the air duct assembly to open;

[0015] When the current temperature of the variable temperature chamber is lower than the lower limit temperature of the first refrigeration temperature range, control the air duct assembly to close.

[0016] In some embodiments, the control of the air duct assembly to control the temperature of the variable temperature chamber through the first air outlet, the second air outlet and a preset second refrigeration temperature range includes:

[0017] When the current temperature of the variable temperature chamber is higher than the upper limit temperature of the second refrigeration temperature range, control the air duct assembly to open;

[0018] When the current temperature of the variable temperature chamber is lower than the lower limit temperature of the second refrigeration temperature range, control the air duct assembly to close.

[0019] In some embodiments, the control of the air duct assembly to control the temperature of the variable temperature chamber through the first air outlet, the second air outlet and a preset refrigeration temperature range includes:

[0020] When the current temperature of the variable temperature chamber is higher than the upper limit temperature of the refrigeration temperature range, control the air duct assembly to open;

[0021] When the current temperature of the variable temperature chamber is lower than the lower limit temperature of the freezing temperature range, control the air duct assembly to close.

[0022] In some embodiments, the first refrigeration temperature range is 0 to 5 °C, the second refrigeration temperature range is 0 to 5 °C, and the freezing temperature range is -1 °C to -18 °C.

[0023] In a second aspect, an embodiment of the present application provides a controller, including at least one processor and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the variable temperature control method as described in the embodiments of the first aspect.

[0024] In a third aspect, an embodiment of the present application provides a refrigeration device, including the controller of the second aspect embodiment.

[0025] The variable temperature control method, controller, and refrigeration device of the refrigeration device according to the embodiments of the present application have at least the following beneficial effects: The variable temperature chamber of the embodiments of the present application is provided with a movable tray and a lower drawer for storing food ingredients. When the variable temperature chamber is in the first refrigeration mode, the air duct assembly is used to convey cold air to the upper space of the microporous cover plate, but the second air outlet is closed, and no cold air is conveyed to the lower drawer, so that the movable tray and the lower drawer are in a high-humidity refrigeration state, meeting the storage requirements of fruits and vegetables and other food ingredients. When the variable temperature chamber is in the second refrigeration mode, the air duct assembly is used to convey cold air to the upper space of the microporous cover plate and the internal space of the lower drawer, so that the movable tray is in a high-humidity refrigeration state and the lower drawer is in a low-humidity refrigeration state, meeting the storage requirements of separating dry and wet in refrigeration. When the variable temperature chamber is in the freezing mode, the air duct assembly is used to convey cold air to the upper space of the microporous cover plate and the internal space of the lower drawer, so that the movable tray is in a high-humidity freezing state and the lower drawer is in a low-humidity freezing state, meeting the storage requirements of separating dry and wet in freezing; Through the above different modes, the fresh-keeping storage of various types of food ingredients is realized. While quickly adjusting the temperature through the air duct assembly, temperature control can be achieved, further meeting the fresh-keeping needs of users' food ingredients.

[0026] Other features and advantages of the present application will be described in the subsequent description, and, in part, will become apparent from the description or will be understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures specifically pointed out in the description, claims, and drawings. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the internal structure of the variable temperature chamber provided by the embodiments of the present application;

[0028] Figure 2It is the rear view of the variable temperature chamber provided by the embodiment of the present application;

[0029] Figure 3 It is the side view of the variable temperature chamber provided by the embodiment of the present application;

[0030] Figure 4 It is the overall flowchart of the variable temperature control method provided by the embodiment of the present application;

[0031] Figure 5 It is the damper control flowchart corresponding to the first refrigeration temperature range provided by the embodiment of the present application;

[0032] Figure 6 It is the damper control flowchart corresponding to the second refrigeration temperature range provided by the embodiment of the present application;

[0033] Figure 7 It is the damper control flowchart corresponding to the freezing temperature range provided by the embodiment of the present application.

[0034] Reference numerals in the drawings:

[0035] Variable temperature chamber 100, variable temperature air duct 200, microporous cover plate 300, movable tray 400, lower drawer 500;

[0036] Air duct assembly 230, first air outlet 210, second air outlet 220, wind blocking assembly 240, wind blocking plate 241, drive mechanism 242;

[0037] Baffle 410, moisture preservation assembly 420

[0038] Upper ventilation opening 310, lower ventilation opening 510. Detailed implementation manners

[0039] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Additionally, the features, operations or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and drawings are only for clearly describing a certain embodiment and do not mean that they are the necessary sequences, unless it is stated that a certain sequence must be followed.

[0040] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, and understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0041] The serial numbers assigned to components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. And the "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connection (coupling).

[0042] With the rise of fresh food e-commerce in recent years, people's long-term storage demand for fresh food ingredients such as meat has gradually been converted into short-term storage demand, which poses new requirements for the fresh food storage in refrigerators. Currently, some refrigerators have a wide temperature change function. For a drawer in the refrigerator, the wide temperature change function is used to adjust the temperature of the drawer to achieve flexible switching between refrigeration and freezing. Users can flexibly adjust the appropriate storage function according to the types of ingredients stored. For example, when storing fruits and vegetables, set the temperature of the drawer to the refrigeration temperature, and when storing meat, set the temperature of the drawer to the freezing temperature.

[0043] The preservation of ingredients is closely related to humidity. Maintaining the drawer at an appropriate humidity level helps to extend the preservation period of the ingredients. For example, a high-humidity environment is conducive to the preservation of fruits and vegetables. In related technologies, in order to maintain humidity in a drawer with a wide temperature change function, the drawer is usually made airtight so that the cold air outside the drawer cannot take away the moisture inside the drawer, thereby maintaining a high-humidity state for a long time. However, after the drawer is made airtight, when using the wide temperature change function to adjust the temperature inside the drawer, the external cold air is difficult to enter the drawer to exchange heat due to the airtightness of the drawer, resulting in a very slow cooling rate of the ingredients inside the drawer, and even the ingredient temperature cannot reach the set temperature, ultimately leading to a poor preservation effect.

[0044] Based on this, the embodiments of the present application provide a temperature change control method, a controller and a refrigeration device thereof. Structurally, a movable tray located in the upper layer and a lower drawer located in the lower layer are divided. The microporous cover plate of the movable tray can be used for air circulation, and the air return port of the lower drawer can also be used for air circulation. Then, using a temperature change air duct, corresponding air duct air supply is controlled according to the current refrigeration or freezing mode, realizing the humidity and temperature control of the movable tray and the lower drawer, thereby improving the adaptability to the preservation of different types of ingredients.

[0045] The following will describe the temperature change control method, the controller and the refrigeration device thereof with reference to the accompanying drawings:

[0046] Referring to Figures 1 to 3 as shown, a variable temperature control method for a refrigeration device provided by an embodiment of the present application. There is a variable temperature chamber 100 in the refrigeration device. The variable temperature chamber 100 includes a variable temperature air duct 200, a microporous cover plate 300, a movable tray 400, and a lower drawer 500. The microporous cover plate 300 is arranged above the movable tray 400. The movable tray 400 is arranged above the lower drawer 500 with an air return opening of the lower drawer 500 left. The variable temperature air duct 200 includes an air duct assembly 230, a wind blocking assembly 240, a first air outlet 210, and a second air outlet 220. The first air outlet 210 communicates with the upper space of the microporous cover plate 300, and the second air outlet 220 communicates with the internal space of the lower drawer 500; Referring to Figure 4 as shown, the variable temperature control method includes but is not limited to the following steps:

[0047] Step S100, in the first refrigeration mode, control the wind blocking assembly 240 to close the second air outlet 220, and control the air duct assembly 230 to control the temperature of the variable temperature chamber 100 through the first air outlet 210 and a preset first refrigeration temperature range;

[0048] Step S200, in the second refrigeration mode, control the wind blocking assembly 240 to open the second air outlet 220, and control the air duct assembly 230 to control the temperature of the variable temperature chamber 100 through the first air outlet 210, the second air outlet 220, and a preset second refrigeration temperature range;

[0049] Step S300, in the freezing mode, control the wind blocking assembly 240 to open the second air outlet 220, and control the air duct assembly 230 to control the temperature of the variable temperature chamber 100 through the first air outlet 210, the second air outlet 220, and a preset freezing temperature range.

[0050] Referring to Figure 1As shown in the figure, a variable-temperature chamber 100 is provided in the refrigeration device. The temperature of the variable-temperature chamber 100 can be adjusted according to the temperature control requirements of the refrigeration device. The variable-temperature chamber 100 includes a microporous cover plate 300, a movable tray 400, and a lower drawer 500. Both the movable tray 400 and the lower drawer 500 are open containers. A microporous cover plate 300 is provided at the open part of the movable tray 400. A relatively airtight space is formed between the microporous cover plate 300 and the movable tray 400. The movable tray 400 is provided at the open part of the lower drawer 500. A relatively airtight space is formed between the movable tray 400 and the lower drawer 500. The above two relatively airtight spaces are used to store food ingredients. The microporous cover plate 300 is at the topmost layer, and there is a certain space between it and the top of the variable-temperature chamber 100. This space is communicated with the return air outlet of the variable-temperature chamber 100 through the front panels of the movable tray 400 and the lower drawer 500 in sequence. In addition, there is an opening between the open parts of the movable tray 400 and the lower drawer 500. This opening serves as the return air outlet of the lower drawer 500. When the air duct assembly 230 inputs air flow into the lower drawer 500, the air flow inside the lower drawer 500 can be output from the return air outlet, increasing the air convection inside the lower drawer 500, thereby improving the heat exchange level of the air inside the lower drawer 500 and accelerating the temperature change rate inside the lower drawer 500. The internal space of the movable tray 400 is relatively airtight. The air flow in the variable-temperature air duct 200 does not directly enter the movable tray 400, but can deliver cold air to the internal space of the movable tray 400 through the micropores in the microporous cover plate 300 to adjust the internal temperature of the movable tray 400.

[0051] Referring to Figure 2 As shown in the figure, the variable-temperature air duct 200 is provided with a first air outlet 210 and a second air outlet 220 in the variable-temperature chamber 100. The first air outlet 210 is communicated with the upper space of the microporous cover plate 300. Therefore, the air flow delivered by the first air outlet 210 enters the return air outlet of the variable-temperature chamber 100 after passing through the upper space of the microporous cover plate 300, the movable tray 400, and the front panel of the lower drawer 500; the second air outlet 220 is communicated with the internal space of the lower drawer 500. Therefore, the air flow delivered by the second air outlet 220 enters the inside of the lower drawer 500 and enters the return air outlet of the variable-temperature chamber 100 after passing through the return air outlet of the lower drawer 500.

[0052] A plurality of micropores are provided on the microporous cover plate 300. The proportion of the opening area of these micropores in the area of the cover plate ranges from 20% to 22%, and the pore diameter can be between 3 mm and 4 mm.

[0053] The above structure provides the basis for the relatively airtight moisture preservation of the movable tray 400 and the air convection inside the lower drawer 500. Based on the above structure, the variable-temperature control method provided by the embodiments of the present application can be divided into several modes, and these modes can be switched with each other.

[0054] Specifically, in the first refrigeration mode, the wind deflector assembly 240 closes the second air outlet 220, so that the air flow in the air duct assembly 230 only enters the upper space of the microporous cover plate 300, but does not enter the internal spaces of the movable tray 400 and the lower drawer 500. The internal spaces of the movable tray 400 and the lower drawer 500 can maintain a high humidity state. At the same time, the temperature of the variable temperature chamber 100 is controlled in combination with the preset first refrigeration temperature range, so that the temperatures in the movable tray 400 and the lower drawer 500 are stabilized in the first refrigeration temperature range, realizing a refrigerated high-humidity environment, which is beneficial to the storage of fruit and vegetable ingredients. Among them, the first refrigeration temperature range can be 0 to 5 °C.

[0055] In the second refrigeration mode, the wind deflector assembly 240 opens the second air outlet 220, so that the air flow in the air duct assembly 230 can enter the upper space of the microporous cover plate 300 and the internal space of the lower drawer 500. The humidity inside the lower drawer 500 decreases, but the humidity inside the movable tray 400 is maintained. At the same time, the temperature of the variable temperature chamber 100 is controlled in combination with the preset second refrigeration temperature range, so that the temperatures in the movable tray 400 and the lower drawer 500 are stabilized in the second refrigeration temperature range, realizing a refrigerated dry-wet separation environment. The upper movable tray 400 is used to store fruits and vegetables, and the lower lower drawer 500 is used to store dry goods. Among them, the second refrigeration temperature range can be 0 to 5 °C.

[0056] In the freezing mode, the wind deflector assembly 240 opens the second air outlet 220, so that the air flow in the air duct assembly 230 can enter the upper space of the microporous cover plate 300 and the internal space of the lower drawer 500. The humidity inside the lower drawer 500 decreases, but the humidity inside the movable tray 400 is maintained. At the same time, the temperature of the variable temperature chamber 100 is controlled in combination with the preset freezing temperature range, so that the temperatures in the movable tray 400 and the lower drawer 500 are stabilized in the freezing temperature range, realizing a frozen dry-wet separation environment. The upper movable tray 400 is used to store ingredients with humidity requirements, and the lower lower drawer 500 is used to store meat ingredients. Among them, the freezing temperature range can be -1 to -18 °C.

[0057] It can be understood that although the first air outlet 210 and the second air outlet 220 are respectively connected to the upper space of the microporous cover plate 300 and the internal space of the lower drawer 500, air is not continuously supplied to the first air outlet 210 and the second air outlet 220. Instead, it is determined whether the damper of the air duct assembly 230 is opened according to the temperature in the variable temperature chamber 100. For the above-mentioned closing of the second air outlet 220, it remains closed regardless of the temperature in the variable temperature chamber 100. Taking the control of the wind shield assembly 240 to close the second air outlet 220 and the control of the air duct assembly 230 to control the temperature through the first air outlet 210 and a preset first refrigeration temperature range as an example, the specific control is to keep the second air outlet 220 in a closed state. The opening and closing of the damper of the air duct assembly 230 are determined according to the current temperature of the variable temperature chamber 100 and the first refrigeration temperature range. If the current temperature of the variable temperature chamber 100 is higher than the upper limit value of the first refrigeration temperature range, the damper of the air duct assembly 230 is opened, and cold air enters the upper space of the microporous cover plate 300 through the first air outlet 210, thereby reducing the temperature of the variable temperature chamber 100. If the current temperature of the variable temperature chamber 100 is lower than the lower limit value of the first refrigeration temperature range, the damper of the air duct assembly 230 is closed to prevent cold air from entering the variable temperature chamber 100 through the first air outlet 210. Then, when the temperature of the variable temperature chamber 100 rises above the upper limit value of the first refrigeration temperature range, the damper of the air duct assembly 230 is reopened for cooling, and so on in a cycle.

[0058] Among them, the air inlet of the variable temperature air duct 200 can be connected to the freezer of the refrigeration device to introduce cold air from the freezer to cool the variable temperature chamber 100. Or the variable temperature air duct 200 is equipped with a refrigeration component or a heating component for adjusting the temperature of the conveyed air flow.

[0059] Through the above mode, three storage environments of high humidity refrigeration, low humidity refrigeration and low humidity freezing are realized in the variable temperature chamber 100. Users can select the corresponding mode according to their own needs, or the refrigeration device can automatically select the corresponding mode according to the ingredients in the movable tray 400 and / or the lower drawer 500. For example, when the user puts fruits and vegetables in the lower drawer 500 and then selects the first refrigeration mode, high humidity refrigeration of fruits and vegetables can be carried out in the variable temperature chamber 100. Therefore, the embodiment of the present application can meet the storage requirements of different types of ingredients, avoid the problem of poor air heat exchange in the closed drawer, and utilize the air duct assembly 230 to provide humidity control, improving the user experience.

[0060] It should be noted that the micro-hole cover plate 300 plays different roles in different modes. When in the first refrigeration mode, some water vapor inside the movable tray 400 can escape to the outside of the micro-hole cover plate 300 through the micro-holes, preventing the berries and other fruits inside the movable tray 400 from mildewing due to excessive humidity and meeting the humidity requirements of 85%-95% for fruit ingredients. When in the freezing mode, the cold air blown through the upper space of the micro-hole cover plate 300 can penetrate into the inside of the movable tray 400 through the micro-holes, which can increase the freezing and cooling speed. When in the defrosting condition of the freezer (for example, using a heating wire to heat the air for defrosting), it can prevent the hot air generated by the heating wire from directly entering the movable tray 400 and causing an impact on the temperature of the ingredients, resulting in temperature fluctuations of the ingredients.

[0061] In some embodiments, a baffle 410 is provided at the front of the movable tray 400. The baffle 410 extends downward to the lower drawer 500 to block the return air inlet of the lower drawer 500. The baffle 410 is provided with a humidity preservation component 420 so that the return air flow of the lower drawer 500 is sent out after passing through the humidity preservation component 420.

[0062] Refer to Figure 3 As shown, the length of the movable tray 400 is less than the length of the lower drawer 500 (here, the length is the distance between the front panel and the rear panel of the movable tray 400 / lower drawer 500). The front edge of the movable tray 400 is provided with an inclined baffle 410 that extends to the edge of the lower drawer 500, so that a relatively sealed space is formed between the lower drawer 500 and the lower drawer 500 through the baffle 410. At this time, the baffle 410 blocks the return air inlet of the lower drawer 500. A humidity preservation component 420 is provided on the baffle 410, so that the return air flow at the return air inlet flows out after passing through the humidity preservation component 420, which can adjust the humidity of the lower drawer 500 to a certain extent. The humidity preservation component 420 can be a humidity preservation film. The humidity preservation film has the functions of humidity preservation and moisture permeability. When the humidity of the lower drawer 500 is too high (>95%), the humidity preservation film permeates moisture to the outside of the lower drawer 500 to reduce the internal humidity. When the humidity of the lower drawer 500 is relatively low (<90%), the humidity preservation film plays a humidity preservation role to meet the humidity requirements of 90%-95% for vegetable ingredients. The humidity preservation component 420 can also be a humidifying device, and the humidity of the lower drawer 500 can be actively humidified through the humidifying device.

[0063] Refer to Figure 3 As shown, in some embodiments, an upper ventilation opening 310 is provided above the micro-hole cover plate 200, and a lower ventilation opening 510 is provided on the lower drawer 500. The first air outlet 210 is docked with the upper ventilation opening 310; the second air outlet 220 is docked with the lower ventilation opening 510.

[0064] The variable temperature chamber is provided with an upper ventilation opening 510 which is connected to the variable temperature air duct 200. The rear panel of the lower drawer 500 is provided with a lower ventilation opening 510 which is connected to the variable temperature air duct 200. The air duct assembly 230 is arranged at the rear part of the variable temperature chamber 100. The first air outlet 210 and the second air outlet 220 are formed by a foam board. And the first air outlet 210 is connected to the upper ventilation opening 310, so that the air flow of the first air outlet 210 blows towards the upper space of the microporous cover plate 300, while the second air outlet 220 is connected to the lower ventilation opening 510 of the lower drawer 500, so that the air flow of the second air outlet 220 blows into the lower drawer 500.

[0065] Referring to Figure 2 As shown, in some embodiments, the wind blocking assembly 240 includes a wind blocking plate 241 and a driving mechanism 242. The rotating shaft of the driving mechanism 242 is connected to the wind blocking plate 241 to control the wind blocking plate 241 to open or close the second air outlet 220. There are various specific forms of the driving mechanism 242. For example, the driving mechanism is a micro motor. A gear is arranged on the output shaft of the micro motor. A part of the wind blocking plate 241 has a long strip-shaped tooth-like structure. The gear and the tooth-like structure are engaged. By rotating the gear of the micro motor, the tooth-like mechanism is driven to move linearly, so that the wind blocking plate 241 can also move linearly to realize the opening and closing of the second air outlet 220. Other structures of the wind blocking assembly 240 are not exemplified one by one here.

[0066] In the above step S100, controlling the temperature of the variable temperature chamber 100 according to a preset first refrigeration temperature range specifically includes:

[0067] Step S110, when the current temperature of the variable temperature chamber 100 is higher than the upper limit temperature of the first refrigeration temperature range, control the air duct assembly 230 to open;

[0068] Step S120, when the current temperature of the variable temperature chamber 100 is lower than the lower limit temperature of the first refrigeration temperature range, control the air duct assembly 230 to close.

[0069] A temperature sensor is arranged in the variable temperature chamber 100. If the current temperature of the variable temperature chamber 100 is higher than the upper limit value of the first refrigeration temperature range, the air door of the air duct assembly 230 is opened, and cold air enters the upper space of the microporous cover plate 300 through the air duct assembly 230, thereby reducing the temperature of the variable temperature chamber 100; if the current temperature of the variable temperature chamber 100 is lower than the lower limit value of the first refrigeration temperature range, the air door of the air duct assembly 230 is closed to prevent cold air from entering the variable temperature chamber 100 through the air duct assembly 230. Then when the temperature of the variable temperature chamber 100 rises above the upper limit value of the first refrigeration temperature range, the air duct assembly 230 is reopened for cooling, and so on in a cycle.

[0070] Referring to Figure 6As shown, controlling the temperature of the variable temperature chamber 100 within a preset second refrigeration temperature range in step S200 includes:

[0071] Step S210, when the current temperature of the variable temperature chamber 100 is higher than the upper limit temperature of the second refrigeration temperature range, control the air duct assembly 230 to open;

[0072] Step S220, when the current temperature of the variable temperature chamber 100 is lower than the lower limit temperature of the second refrigeration temperature range, control the air duct assembly 230 to close.

[0073] A temperature sensor is set in the variable temperature chamber 100. If the current temperature of the variable temperature chamber 100 is higher than the upper limit value of the second refrigeration temperature range, the damper of the air duct assembly 230 is opened, and cold air enters the upper space of the microporous cover plate 300 through the air duct assembly 230, thereby reducing the temperature of the variable temperature chamber 100. The cold air also enters the lower drawer 500 through the air duct assembly 230 to reduce the internal temperature of the lower drawer 500. The internal temperature of the movable tray 400 can be adjusted through the micropores of the microporous cover plate 300. If the current temperature of the variable temperature chamber 100 is lower than the lower limit value of the second refrigeration temperature range, the damper of the air duct assembly 230 is closed to prevent cold air from entering the variable temperature chamber 100 through the air duct assembly 230. Then, when the temperature of the variable temperature chamber 100 rises above the upper limit temperature of the second refrigeration temperature range, the air duct assembly 230 is reopened for cooling, and so on in a cycle.

[0074] Refer to Figure 7 As shown, controlling the temperature of the variable temperature chamber 100 within a preset freezing temperature range in step S300 includes:

[0075] Step S310, when the current temperature of the variable temperature chamber 100 is higher than the upper limit temperature of the freezing temperature range, control the air duct assembly 230 to open;

[0076] Step S320, when the current temperature of the variable temperature chamber 100 is lower than the lower limit temperature of the freezing temperature range, control the air duct assembly 230 to close.

[0077] A temperature sensor is set in the variable temperature chamber 100. If the current temperature of the variable temperature chamber 100 is higher than the upper limit value of the freezing temperature range, the air door of the air duct assembly 230 is opened, and cold air enters the upper space of the microporous cover plate 300 through the air duct assembly 230, thereby reducing the temperature of the variable temperature chamber 100. The cold air also enters the lower drawer 500 through the air duct assembly 230 to reduce the internal temperature of the lower drawer 500. The internal temperature of the movable tray 400 can be adjusted through the micropores of the microporous cover plate 300. If the current temperature of the variable temperature chamber 100 is lower than the lower limit value of the freezing temperature range, the air door of the air duct assembly 230 is closed to prevent cold air from entering the variable temperature chamber 100 through the air duct assembly 230. Then, when the temperature of the variable temperature chamber 100 rises above the upper limit value of the freezing temperature range, the air duct assembly 230 is reopened for cooling, and this cycle repeats.

[0078] In the variable temperature chamber of the embodiment of the present application, a movable tray and a lower drawer are provided for storing food materials. When the variable temperature chamber is in the first refrigeration mode, the air duct assembly is used to convey cold air to the upper space of the microporous cover plate, but the second air outlet is closed, and cold air is not conveyed to the lower drawer, so that the movable tray and the lower drawer are in a high-humidity refrigeration state, meeting the storage requirements of fruit and vegetable food materials. When the variable temperature chamber is in the second refrigeration mode, the air duct assembly is used to convey cold air to the upper space of the microporous cover plate and the internal space of the lower drawer, so that the movable tray is in a high-humidity refrigeration state and the lower drawer is in a low-humidity refrigeration state, meeting the storage requirements of refrigerated dry-wet separation. When the variable temperature chamber is in the freezing mode, the air duct assembly is used to convey cold air to the upper space of the microporous cover plate and the internal space of the lower drawer, so that the movable tray is in a high-humidity freezing state and the lower drawer is in a low-humidity freezing state, meeting the storage requirements of frozen dry-wet separation; through the above different modes, the fresh-keeping storage of various types of food materials is realized. While quickly adjusting the temperature through the air duct assembly, temperature control can be achieved, further meeting the fresh-keeping needs of the user's food materials.

[0079] The variable temperature control method of the present application will be described in detail below through an example.

[0080] In the variable temperature chamber 100, a microporous cover plate 300, a movable tray 400, and a lower drawer 500 are arranged. The three are stacked in sequence to form a large variable temperature storage structure. The microporous cover plate 300 is arranged above the movable tray 400, and the movable tray 400 is arranged above the lower drawer 500, forming a three-layer structure. A handle part is provided at the front of the movable tray 400. After the lower drawer 500 is pulled out, the user can pull out or push in the movable tray 400 through the handle part to realize forward and backward movement. The user can choose to take out the food ingredients in the movable tray 400 or the lower drawer 500. Since the microporous cover plate 300 and the movable tray 400, and the movable tray 400 and the lower drawer 500 are completely overlapped, a relatively airtight space can be formed in the movable tray 400 and the lower drawer 500, which has a good moisturizing effect on the food ingredients.

[0081] A variable temperature air duct 200 is provided at the back of the variable temperature storage structure. A supply air damper is arranged at the bottom of the variable temperature air duct 200. The supply air damper is a single damper, which connects the freezer and the variable temperature chamber 100. Its function is to let the freezer supply cold air to the variable temperature chamber 100 for temperature control. The variable temperature air duct 200 is formed by combining an air duct cover plate and air duct foam. The air duct foam forms an air duct, which is communicated with the damper of the air duct assembly 230 while being communicated with the first air outlet 210 and the second air outlet 220. The first air outlet 210 is communicated with the upper space of the microporous cover plate 300 (the first layer of the three-layer structure), and the second air outlet 220 is communicated with the inner space of the lower drawer 500 (the third layer of the three-layer structure). A movable wind deflector 241 and a driving motor 242 are also arranged at the second air outlet 220. The wind deflector 241 is provided with a transmission tooth-like structure (tooth teeth). The driving motor 242 drives the tooth-like structure to move up and down through a rotating gear to realize the opening and closing of the second air outlet 220.

[0082] When the user sets the refrigeration high humidity mode, the driving motor 242 drives the wind deflector 241 to close the second air outlet 220. The cold air transported by the freezer is transported to the upper part of the microporous cover plate 300 through the first layer air outlet. The cold air surrounds the movable tray 400 and the lower drawer 500 and returns to the freezer through the air return outlet of the variable temperature chamber 100. During the process, since the cold air does not enter the movable tray 400 and the lower drawer 500, the cold air cannot take away the internal moisture of the movable tray 400 and the lower drawer 500, ensuring the high humidity retention of the movable tray 400 and the lower drawer 500.

[0083] When the user sets the freezing mode, the driving motor 242 drives the wind deflector 241 to open the second air outlet 220. The cold air transported by the freezer is transported to the upper part of the microporous cover plate 300 and the inside of the lower drawer 500 through the first layer air outlet and the third layer air outlet. Since the cold air enters the lower drawer 500 but does not enter the movable tray 400, the high humidity retention of the movable tray 400 and the performance requirements such as the rapid cooling, temperature storage, and freezing ability of the lower drawer 500 can be realized.

[0084] For the control of the damper (single damper) of the air duct assembly 230, when the real-time temperature monitored by the temperature sensor in the variable temperature chamber 100 is higher than the set temperature (the set temperature is related to the upper limit value of the first refrigeration temperature range, the upper limit value of the second refrigeration temperature range, or the upper limit value of the freezing temperature range), the damper of the air duct assembly 230 opens, and the freezing fan blows the cold air from the freezing chamber evaporator into the variable temperature chamber 100 through the freezing chamber ----- single damper ----- variable temperature air duct 200 ----- air duct outlet to achieve cooling.

[0085] The microporous cover plate 300 plays different roles in different modes. When in the first refrigeration mode, some water vapor inside the movable tray 400 can escape to the outside of the microporous cover plate 300 through the micropores, preventing berries and other fruits from mildewing due to excessive humidity inside the movable tray 400 and meeting the humidity requirements of 85%-95% for fruit ingredients; when in the freezing mode, the cold air blown through the upper space of the microporous cover plate 300 can penetrate into the inside of the movable tray 400 through the micropores, which can improve the freezing and cooling speed; when in the freezing defrosting condition (such as using a heating wire to heat the air for defrosting), it can prevent the hot air generated by the heating wire from directly entering the movable tray 400 and causing an impact on the temperature of the ingredients, resulting in temperature fluctuations of the ingredients.

[0086] Humidity adjustment process: When the user sets high humidity for refrigeration, the variable temperature chamber 100 is controlled at a temperature of 0 to 5°C in the first refrigeration temperature range, the damper of the air duct assembly 230 is opened, and the second air outlet 220 is closed to meet the storage requirements for high-humidity fruits and vegetables; when the user sets low humidity for refrigeration, the variable temperature chamber 100 is controlled at a temperature of 0 to 5°C in the second refrigeration temperature range, the damper of the air duct assembly 230 is opened, and the second air outlet 220 is opened to meet the storage requirements for separate storage of dry and wet items (fruits and vegetables on the upper layer, dry goods on the lower layer); when the user sets freezing, the variable temperature chamber 100 is controlled at a temperature of -1 to -18°C in the freezing temperature range, the damper of the air duct assembly 230 is opened, the second air outlet 220 is opened, and the movable tray 400 meets the requirements for freezing and constant-temperature high-humidity storage.

[0087] The embodiment of the present application also provides a controller, including at least one processor and a memory for communicating with the at least one processor; the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the variable temperature control method as described in the above embodiment.

[0088] The embodiment of the present application also provides a refrigeration device, including the controller of the above embodiment.

[0089] Those of ordinary skill in the art will understand that all or some of the steps and systems disclosed above can be implemented as software, firmware, hardware, and their appropriate combinations. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that communication media typically contains computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0090] The above is a specific description of the preferred embodiments of the present application, but the present application is not limited to the above embodiments. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present application, and these equivalent deformations or substitutions are all included within the scope defined by the claims of the present application.

Claims

1. Variable temperature control method for refrigeration equipment, Characterized in that, A variable temperature chamber is provided in the refrigeration equipment. The variable temperature chamber includes a variable temperature air duct, a microporous cover plate, a movable tray and a lower drawer. The microporous cover plate is arranged above the movable tray. The movable tray is arranged above the lower drawer and leaves an air return opening for the lower drawer. The variable temperature air duct includes an air duct assembly, a wind blocking assembly, a first air outlet and a second air outlet. The first air outlet communicates with the upper space of the microporous cover plate, and the second air outlet communicates with the internal space of the lower drawer; The variable temperature control method includes: In the first refrigeration mode, control the wind blocking assembly to close the second air outlet, and control the air duct assembly to control the temperature of the variable temperature chamber through the first air outlet and a preset first refrigeration temperature range; In the second refrigeration mode, control the wind blocking assembly to open the second air outlet, and control the air duct assembly to control the temperature of the variable temperature chamber through the first air outlet, the second air outlet and a preset second refrigeration temperature range; In the freezing mode, control the wind blocking assembly to open the second air outlet, and control the air duct assembly to control the temperature of the variable temperature chamber through the first air outlet, the second air outlet and a preset freezing temperature range.

2. The variable temperature control method according to claim 1, Characterized in that, A baffle is arranged at the front part of the movable tray. The baffle extends towards the lower drawer to block the air return opening of the lower drawer. The baffle is provided with a moisture preservation assembly so that the air return airflow of the lower drawer is sent out through the moisture preservation assembly.

3. The variable temperature control method according to claim 1, Characterized in that, An upper ventilation opening is arranged above the microporous cover plate, and a lower ventilation opening is arranged on the lower drawer. The first air outlet is docked with the upper ventilation opening; the second air outlet is docked with the lower ventilation opening.

4. The variable temperature control method according to claim 1, Characterized in that, The wind blocking assembly includes a wind blocking plate and a driving mechanism. The rotating shaft of the driving mechanism is connected to the wind blocking plate to control the wind blocking plate to open or close the second air outlet.

5. The variable temperature control method according to claim 1, Characterized in that, The control of the air duct assembly to control the temperature of the variable temperature chamber through the first air outlet and a preset first refrigeration temperature range includes: When the current temperature of the variable temperature chamber is higher than the upper limit temperature of the first refrigeration temperature range, control the air duct assembly to open; When the current temperature of the variable temperature chamber is lower than the lower limit temperature of the first refrigeration temperature range, control the air duct assembly to close.

6. The variable temperature control method according to claim 4, Characterized in that, The control of the air duct assembly to control the temperature of the variable temperature chamber through the first air outlet, the second air outlet and a preset second refrigeration temperature range includes: When the current temperature of the variable temperature chamber is higher than the upper limit temperature of the second refrigeration temperature range, control the air duct assembly to open; When the current temperature of the variable temperature chamber is lower than the lower limit temperature of the second refrigeration temperature range, control the air duct assembly to close.

7. The variable temperature control method according to claim 4, Characterized in that, Controlling the temperature of the variable temperature chamber by the air duct assembly through the first air outlet, the second air outlet and a preset freezing temperature range includes: When the current temperature of the variable temperature chamber is higher than the upper limit temperature of the freezing temperature range, controlling the air duct assembly to open; When the current temperature of the variable temperature chamber is lower than the lower limit temperature of the freezing temperature range, controlling the air duct assembly to close.

8. The variable temperature control method according to claim 1, wherein, The first refrigerating temperature range is 0 to 5 °C, the second refrigerating temperature range is 0 to 5 °C, and the freezing temperature range is -1 °C to -18 °C.

9. A controller, wherein, comprises at least one processor and a memory for communicatively connecting with the at least one processor; The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the variable temperature control method according to any one of claims 1 to 8.

10. A refrigeration device, wherein, comprises the controller according to claim 10.

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