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 cold storage mode, the movable tray and the lower drawer are in a cold storage high-humidity state, and in the second cold storage mode, the air duct assembly is used for conveying cold air to the upper space of the microporous cover plate, the movable tray and the inner space of the lower drawer, so that the movable tray and the lower drawer are in a cold storage low-humidity state. Cold air is conveyed to the upper space of the microporous cover plate, the movable tray and the inner space of the lower-layer drawer through the air duct assembly, so that the movable tray and the lower-layer drawer are 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 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 needs for refrigerating and freezing food materials, in the related art, a drawer suitable for a wide-range variable temperature function is provided in a 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 fruits and vegetables in the drawer, the wide-range variable temperature function can be set to the refrigeration mode, so that the fruits and vegetables can be stored in the above-zero temperature range. When the user stores meat in the drawer, the wide-range variable temperature function can be set to the freezing mode, so that the meat 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, the closed drawer makes it difficult for the cold air outside the drawer to exchange heat with the air inside the drawer when switching from the refrigeration mode to the freezing mode, resulting in a slow freezing speed of the food materials, 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 a duct assembly, a first air duct and a second air duct. The first air duct communicates with the upper space of the microporous cover plate. The second air duct communicates with the internal spaces of the movable tray and the lower drawer. The variable temperature control method includes: In a first refrigeration mode, controlling the duct assembly to open the first air duct, close the second air duct, and control the temperature of the variable temperature chamber according to a preset first refrigeration temperature range; In a second refrigeration mode, controlling the duct assembly to open the first air duct and the second air duct, and control the temperature of the variable temperature chamber according to a preset second refrigeration temperature range; In a freezing mode, controlling the duct assembly to open the first air duct and the second air duct, and control the temperature of the variable temperature chamber according to a preset freezing temperature range.

[0006] 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 airflow of the lower drawer is sent out through the moisture preservation component.

[0007] In some embodiments, the movable tray is provided with a first ventilation opening, and the lower drawer is provided with a second ventilation opening. The first air outlet of the first air duct faces the microporous cover plate; the second air outlet of the second air duct faces the first ventilation opening, and the third air outlet of the second air duct faces the second ventilation opening.

[0008] In some embodiments, the air duct assembly further includes a first air damper corresponding to the first air duct and a second air damper corresponding to the second air duct; Controlling the air duct assembly to open the first air duct and close the second air duct includes: Controlling the opening and closing of the first air damper according to the temperature of the variable temperature chamber, and controlling the second air damper to remain closed; Controlling the air duct assembly to open the first air duct and the second air duct includes: Controlling the opening and closing of the first air damper and the second air damper according to the temperature of the variable temperature chamber.

[0009] In some embodiments, controlling the temperature of the variable temperature chamber according to 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, controlling the first air damper to open; When the current temperature of the variable temperature chamber is lower than the lower limit temperature of the first refrigeration temperature range, controlling the first air damper to close.

[0010] In some embodiments, controlling the temperature of the variable temperature chamber according to 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, controlling the first air damper and the second air damper to open; When the current temperature of the variable temperature chamber is lower than the lower limit temperature of the second refrigeration temperature range, controlling the first air damper and the second air damper to close.

[0011] In some embodiments, controlling the temperature of the variable temperature chamber according to 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 first air damper and the second air damper to open; When the current temperature of the variable temperature chamber is lower than the lower limit temperature of the freezing temperature range, control the first air damper and the second air damper to close.

[0012] 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.

[0013] 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 so that the at least one processor can execute the variable temperature control method as described in the embodiments of the first aspect.

[0014] In a third aspect, an embodiment of the present application provides a refrigeration device, including the controller of the embodiment of the second aspect.

[0015] 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 embodiment 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 deliver cold air to the upper space of the micro-hole cover plate, but not to the movable tray and 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 ingredients. When the variable temperature chamber is in the second refrigeration mode, the air duct assembly is used to deliver cold air to the upper space of the micro-hole cover plate, the internal space of the movable tray and the lower drawer, so that the movable tray and the lower drawer are in a low-humidity refrigeration state, meeting the storage requirements of dry goods ingredients. When the variable temperature chamber is in the freezing mode, the air duct assembly is used to deliver cold air to the upper space of the micro-hole cover plate, the internal space of the movable tray and the lower drawer, so that the movable tray and the lower drawer are in a low-humidity freezing state, meeting the storage requirements of meat ingredients; Through the above different modes, the fresh-keeping storage of various types of food ingredients is realized, and the temperature control can be achieved while quickly adjusting the temperature through the air duct assembly, further meeting the fresh-keeping needs of the user's food ingredients.

[0016] Other features and advantages of the present application will be described in the subsequent description, and some of them will be obvious from the description, or will be understood by implementing the present application. The objectives and other advantages of the present application can be realized and obtained through the structures specifically pointed out in the description, claims and drawings. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the internal structure of the variable temperature chamber provided by the embodiment of the present application; Figure 2 is a rear view of the variable temperature chamber provided by the embodiment of the present application; Figure 3 is a side view of the variable temperature chamber provided by an embodiment of the present application; Figure 4 is an overall flowchart of the variable temperature control method provided by an embodiment of the present application; Figure 5 is a damper control flowchart corresponding to the first refrigeration temperature range provided by an embodiment of the present application; Figure 6 is a damper control flowchart corresponding to the second refrigeration temperature range provided by an embodiment of the present application; Figure 7 is a damper control flowchart corresponding to the freezing temperature range provided by an embodiment of the present application.

[0018] Reference numerals: Variable temperature chamber 100, variable temperature air duct 200, microporous cover plate 300, movable tray 400, lower drawer 500; First air duct 210, second air duct 220, air duct assembly 230, first air outlet 221, second air outlet 231, third air outlet 232; Baffle 410, moisture preservation component 420; First ventilation opening 430, second ventilation opening 510. Detailed implementation manners

[0019] 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. In addition, the features, operations or characteristics described in the specification can be combined in any appropriate 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 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.

[0020] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the present number, above, below, within, etc. are understood as including the present number. If the first and second are described only for the purpose of distinguishing technical features, they cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0021] The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. For the terms "connected" and "coupled" used in this application, unless otherwise specified, both include direct and indirect connection (coupling).

[0022] 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 transformed into short-term storage demand, which poses new requirements for the fresh food storage in refrigerators. Currently, some refrigerators have a wide-range temperature change function. For a drawer in the refrigerator, the wide-range 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, the temperature of the drawer is set to the refrigeration temperature, and when storing meat, the temperature of the drawer is set to the freezing temperature.

[0023] The preservation of food ingredients is closely related to humidity. Maintaining the appropriate humidity in the drawer helps to extend the preservation period of food 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-range 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 the wide-range temperature change function is used to adjust the temperature inside the drawer, the outside 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 food ingredients inside the drawer, and even the temperature of the food ingredients cannot reach the set temperature, ultimately leading to a poor preservation effect.

[0024] 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, the corresponding air duct is controlled to supply air 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 food ingredients.

[0025] The temperature change control method, the controller and the refrigeration device thereof will be described below with reference to the accompanying drawings: Refer to Figures 1 to 3As shown in the figure, 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 first air duct 210, and a second air duct 220. The first air duct 210 communicates with the upper space of the microporous cover plate 300, and the second air duct 220 communicates with the internal spaces of the movable tray 400 and the lower drawer 500; Refer to Figure 4 As shown in the figure, the variable temperature control method includes but is not limited to the following steps: Step S100, in the first refrigeration mode, control the air duct assembly 230 to open the first air duct 210, close the second air duct 220, and control the temperature of the variable temperature chamber 100 according to a preset first refrigeration temperature range; Step S200, in the second refrigeration mode, control the air duct assembly 230 to open the first air duct 210 and the second air duct 220, and control the temperature of the variable temperature chamber 100 according to a preset second refrigeration temperature range; Step S300, in the freezing mode, control the air duct assembly 230 to open the first air duct 210 and the second air duct 220, and control the temperature of the variable temperature chamber 100 according to a preset freezing temperature range.

[0026] Refer to Figure 1As shown in the figure, a variable temperature chamber 100 is provided in the refrigeration equipment. The temperature of the variable temperature chamber 100 can be adjusted according to the temperature control requirements of the refrigeration equipment. 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. Thus, the heat exchange level of the air inside the lower drawer 500 is improved, and the temperature change rate inside the lower drawer 500 is accelerated. When the air duct assembly 230 inputs air flow into the movable tray 400, the air inside the movable tray 400 can be output through the micropores in the microporous cover plate 300. Therefore, through the micropores, the air convection inside the movable tray 400 can be improved, and the temperature change rate inside the movable tray 400 is accelerated.

[0027] Referring to Figure 2 As shown in the figure, the air duct assembly 230 sets a first air duct 210 and a second air duct 220 in the variable temperature chamber 100. The first air duct 210 is communicated with the upper space of the microporous cover plate 300. Therefore, the air flow conveyed by the first air duct 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 duct 220 is communicated with the internal spaces of the movable tray 400 and the lower drawer 500. Therefore, the air flow conveyed by the second air duct 220 enters the interiors of the movable tray 400 and the lower drawer 500, and enters the return air outlet of the variable temperature chamber 100 after passing through the return air outlets of the microporous cover plate 300 and the lower drawer 500 respectively.

[0028] Among them, a plurality of micropores are provided on the microporous cover plate 300. The proportion of the opening area of these micropores in the cover plate area ranges from 20% to 22%, and the pore diameter can be between 3 mm and 4 mm.

[0029] The above structure provides the basis for air convection inside the movable tray 400 and 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.

[0030] Specifically, in the first refrigeration mode, the air duct assembly 230 opens the first air duct 210 and closes the second air duct 220, so that the air flow in the air duct assembly 230 only enters the upper space of the micro-hole 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.

[0031] In the second refrigeration mode, the air duct assembly 230 opens the first air duct 210 and the second air duct 220, so that the air flow in the air duct assembly 230 can enter the upper space of the micro-hole cover plate 300, the internal spaces of the movable tray 400 and the lower drawer 500, and the humidity inside the movable tray 400 and the lower drawer 500 is reduced. 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 low-humidity environment, which is beneficial to the storage of dry ingredients. Among them, the second refrigeration temperature range can be 0 to 5 °C.

[0032] In the freezing mode, the air duct assembly 230 opens the first air duct 210 and the second air duct 220, so that the air flow in the air duct assembly 230 can enter the upper space of the micro-hole cover plate 300, the internal spaces of the movable tray 400 and the lower drawer 500, and the humidity inside the movable tray 400 and the lower drawer 500 is reduced. 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 freezing low-humidity environment, which is beneficial to the storage of meat ingredients. Among them, the freezing temperature range can be -1 to -18 °C.

[0033] It can be understood that opening the first air duct 210 / second air duct 220 mentioned above does not mean keeping the corresponding air damper open all the time. Instead, it is determined whether the air damper is open according to the temperature in the variable temperature chamber 100, that is, the corresponding air damper is in a state where it can be opened; and closing the second air duct 220 mentioned above means keeping it closed all the time regardless of the temperature in the variable temperature chamber 100. Taking the opening of the first air duct 210 and the closing of the second air duct 220 as an example, the specific control is to keep the second air duct 220 in a closed state and not convey air flow to the movable tray 400 and the lower drawer 500. The opening and closing of the first air duct 210 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 first air duct 210 is opened, and cold air enters the upper space of the microporous cover plate 300 through the first air duct 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 first air duct 210 is closed to prevent cold air from entering the variable temperature chamber 100 through the first air duct 210. Then, when the temperature of the variable temperature chamber 100 rises above the upper limit value of the first refrigeration temperature range, the first air duct 210 is reopened for cooling, and so on in a cycle.

[0034] 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.

[0035] 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, the user puts fruits and vegetables in the lower drawer 500 and then selects the first refrigeration mode to refrigerate the fruits and vegetables with high humidity 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.

[0036] It should be noted that the micro-porous cover plate 300 plays different roles in different modes. In the first refrigeration mode, some water vapor inside the movable tray 400 can escape to the outside of the micro-porous cover plate 300 through the micro-pores, 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-based food ingredients; in the freezing mode, the cold air blown through the upper space of the micro-porous cover plate 300 can penetrate into the interior of the movable tray 400 through the micro-pores, which can improve the freezing and cooling speed; in the working condition of defrosting the freezer (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 food ingredients, resulting in temperature fluctuations of the food ingredients.

[0037] 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 opening 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 through the humidity preservation component 420.

[0038] 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 opening 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 opening flows out 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, which 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 transmits 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-based food 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.

[0039] Refer to Figure 3 As shown, in some embodiments, the movable tray 400 is provided with a first ventilation opening 430, and the lower drawer 500 is provided with a second ventilation opening 510. The first air outlet 221 of the first air duct 210 faces the micro-porous cover plate 300; the second air outlet 231 of the second air duct 220 faces the first ventilation opening 430, and the third air outlet 232 of the second air duct 220 faces the second ventilation opening 510.

[0040] The rear panel of the movable tray 400 is provided with a first ventilation opening 430, and the rear panel of the lower drawer 500 is provided with a second ventilation opening 510. The air duct assembly 230 is arranged at the rear of the variable temperature chamber 100, and the first air duct 210 and the second air duct 220 are formed by a foam board. Moreover, the first air outlet 221 of the first air duct 210 is above the microporous cover plate 300, so that the air flow of the first air duct 210 blows towards the upper space of the microporous cover plate 300. The second air duct 220 is divided into a second air outlet 231 and a third air outlet 232. The second air outlet 231 is connected to the first ventilation opening 430 of the movable tray 400, and the third air outlet 232 is connected to the second ventilation opening 510 of the lower drawer 500, so that the air flow of the second air duct 220 blows into the movable tray 400 and the lower drawer 500.

[0041] In some embodiments, the air duct assembly 230 further includes a first air damper corresponding to the first air duct 210 and a second air damper corresponding to the second air duct 220, that is, the air duct assembly 230 is a double-air-damper assembly; In the above step S100, controlling the air duct assembly 230 to open the first air duct 210 and close the second air duct 220 specifically means controlling the opening and closing of the first air damper according to the temperature of the variable temperature chamber 100 and controlling the second air damper to remain closed; Refer to Figure 5 As shown, in the above step S200 or S300, controlling the air duct assembly 230 to open the first air duct 210 and the second air duct 220 specifically means controlling the opening and closing of the first air damper and the second air damper according to the temperature of the variable temperature chamber 100.

[0042] In the above step S100, controlling the temperature of the variable temperature chamber 100 according to the preset first refrigeration temperature range specifically includes: 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 first air damper to open; 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 first air damper to close.

[0043] 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 first air duct 210 is opened, and cold air enters the upper space of the microporous cover plate 300 through the first air duct 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 first air duct 210 is closed to prevent cold air from entering the variable temperature chamber 100 through the first air duct 210. After that, when the temperature of the variable temperature chamber 100 rises above the upper limit temperature of the first refrigeration temperature range, the first air duct 210 is reopened for cooling, and so on in a cycle.

[0044] Refer to Figure 6As shown, controlling the temperature of the variable temperature compartment 100 within a preset second refrigeration temperature range in step S200 above includes: Step S210, when the current temperature of the variable temperature compartment 100 is higher than the upper limit temperature of the second refrigeration temperature range, control the first air damper and the second air damper to open; Step S220, when the current temperature of the variable temperature compartment 100 is lower than the lower limit temperature of the second refrigeration temperature range, control the first air damper and the second air damper to close.

[0045] A temperature sensor is provided in the variable temperature compartment 100. If the current temperature of the variable temperature compartment 100 is higher than the upper limit value of the second refrigeration temperature range, the first air duct 210 and the second air duct 220 are opened. Cold air enters the upper space of the microporous cover plate 300 through the first air duct 210, thereby reducing the temperature of the variable temperature compartment 100. The cold air also enters the movable tray 400 and the lower drawer 500 through the second air duct 220, reducing the internal temperatures of the movable tray 400 and the lower drawer 500. If the current temperature of the variable temperature compartment 100 is lower than the lower limit value of the second refrigeration temperature range, the first air duct 210 and the second air duct 220 are closed to prevent cold air from entering the variable temperature compartment 100 through the first air duct 210 and to prevent cold air from entering the movable tray 400 and the lower drawer 500 through the second air duct 220. After the temperature of the variable temperature compartment 100 rises above the upper limit value of the second refrigeration temperature range, the first air duct 210 and the second air duct 220 are reopened for cooling, and so on in a cycle.

[0046] Refer to Figure 7 As shown, controlling the temperature of the variable temperature compartment 100 within a preset freezing temperature range in step S300 above includes: Step S310, when the current temperature of the variable temperature compartment 100 is higher than the upper limit temperature of the freezing temperature range, control the first air damper and the second air damper to open; Step S320, when the current temperature of the variable temperature compartment 100 is lower than the lower limit temperature of the freezing temperature range, control the first air damper and the second air damper to close.

[0047] 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 first air duct 210 and the second air duct 220 are opened. Cold air enters the upper space of the microporous cover plate 300 through the first air duct 210, thereby reducing the temperature of the variable temperature chamber 100. The cold air also enters the movable tray 400 and the lower drawer 500 through the second air duct 220, reducing the internal temperatures of the movable tray 400 and the lower drawer 500. If the current temperature of the variable temperature chamber 100 is lower than the lower limit value of the freezing temperature range, the first air duct 210 and the second air duct 220 are closed to prevent cold air from entering the variable temperature chamber 100 through the first air duct 210 and prevent cold air from entering the movable tray 400 and the lower drawer 500 through the second air duct 220. After that, when the temperature of the variable temperature chamber 100 rises above the upper limit value of the freezing temperature range, the first air duct 210 and the second air duct 220 are reopened for cooling, and so on in a cycle.

[0048] In the variable temperature chamber 100 of the embodiment of the present application, a movable tray 400 and a lower drawer 500 are provided for storing food ingredients. When the variable temperature chamber 100 is in the first refrigeration mode, the air duct assembly 230 is used to convey cold air to the upper space of the microporous cover plate 300, but not to the movable tray 400 and the lower drawer 500, so that the movable tray 400 and the lower drawer 500 are in a high-humidity refrigeration state, meeting the storage requirements of fruit and vegetable ingredients. When the variable temperature chamber 100 is in the second refrigeration mode, the air duct assembly 230 is used to convey cold air to the upper space of the microporous cover plate 300, the internal spaces of the movable tray 400 and the lower drawer 500, so that the movable tray 400 and the lower drawer 500 are in a low-humidity refrigeration state, meeting the storage requirements of dry food ingredients. When the variable temperature chamber 100 is in the freezing mode, the air duct assembly 230 is used to convey cold air to the upper space of the microporous cover plate 300, the internal spaces of the movable tray 400 and the lower drawer 500, so that the movable tray 400 and the lower drawer 500 are in a low-humidity freezing state, meeting the storage requirements of meat ingredients; through the above different modes, the fresh storage of various types of food ingredients is realized, and while quickly adjusting the temperature through the air duct assembly 230, temperature control can be achieved, further meeting the fresh-keeping needs of the user's food ingredients.

[0049] The variable temperature control method of the present application will be described in detail below through an example.

[0050] 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.

[0051] 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 double 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 is respectively provided with a refrigerating air duct and a freezing air duct. The refrigerating air duct and the freezing air duct are respectively communicated with the air outlets corresponding to the double damper. The refrigerating air duct is communicated to the upper space of the microporous cover plate 300 (the first layer of the three-layer structure), and the freezing air duct is communicated to the internal spaces of the movable tray 400 and the lower drawer 500 (the second and third layers of the three-layer structure).

[0052] When the user sets the refrigerating high humidity mode, the double damper connects the refrigerating air duct. 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, and the cold air surrounds the movable tray 400 and the lower drawer 500 and returns to the freezer through the return air 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.

[0053] When the user sets the freezing mode, the double damper connects the refrigerating air duct and the freezing air duct. The cold air transported by the freezer is transported to the interiors of the movable tray 400 and the lower drawer 500 through the second-layer and third-layer air outlets. Since the cold air enters the movable tray 400 and the lower drawer 500, the performance requirements such as the rapid cooling and temperature storage of the movable tray 400 and the lower drawer 500 and the freezing capacity can be ensured.

[0054] For the control of the double air damper, when the real-time temperature monitored by the temperature sensor in the variable temperature compartment 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 mentioned above), the corresponding air damper in the double air damper opens, and the freezing fan blows the cold air from the freezing compartment evaporator through the freezing compartment-----double air damper-----variable temperature air duct 200-----air duct air outlet into the variable temperature compartment 100 to achieve temperature reduction.

[0055] 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 the berries and other fruits inside the movable tray 400 from getting moldy 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 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 (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 ingredient temperature, resulting in ingredient temperature fluctuations.

[0056] Humidity adjustment process: When the user sets high humidity for refrigeration, the variable temperature compartment 100 is controlled at a temperature of 0 to 5°C in the first refrigeration temperature range, the air damper at the refrigeration air duct is opened, and the air damper at the freezing air duct is closed to meet the storage requirements for high-humidity fruits and vegetables; when the user sets low humidity for refrigeration, the variable temperature compartment 100 is controlled at a temperature of 0 to 5°C in the second refrigeration temperature range, and the two air dampers at the refrigeration air duct and the freezing air duct are opened to meet the storage requirements for dry goods; when the user sets freezing, the variable temperature compartment 100 is controlled at a temperature of -1 to -18°C in the freezing temperature range, and the two air dampers at the refrigeration air duct and the freezing air duct are opened to meet the storage requirements for meats.

[0057] The embodiment of the present application also provides a controller, including at least one processor and a memory for communicatively connecting with at least one processor; the memory stores instructions that can be executed by at least one processor, and the instructions are executed by at least one processor so that at least one processor can execute the variable temperature control method as described in the above embodiment.

[0058] The embodiment of the present application also provides a refrigeration device, including the controller of the above embodiment.

[0059] Those of ordinary skill in the art will appreciate that all or some of the steps and systems disclosed above in the methods can be implemented as software, firmware, hardware, and appropriate combinations thereof. 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 disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and that can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, a communication medium typically includes 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.

[0060] 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, and 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 a duct assembly, a first air duct and a second air duct. The first air duct communicates with the upper space of the microporous cover plate, and the second air duct communicates with the internal spaces of the movable tray and the lower drawer; the variable temperature control method includes: In the first refrigeration mode, control the duct assembly to open the first air duct, close the second air duct, and control the temperature of the variable temperature chamber according to a preset first refrigeration temperature range; In the second refrigeration mode, control the duct assembly to open the first air duct and the second air duct, and control the temperature of the variable temperature chamber according to a preset second refrigeration temperature range; In the freezing mode, control the duct assembly to open the first air duct and the second air duct, and control the temperature of the variable temperature chamber according to 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, 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 airflow of the lower drawer is sent out through the moisture preservation component.

3. The variable temperature control method according to claim 1, characterized in that, the movable tray is provided with a first ventilation opening, and the lower drawer is provided with a second ventilation opening. The first air outlet of the first air duct faces the microporous cover plate; the second air outlet of the second air duct faces the first ventilation opening, and the third air outlet of the second air duct faces the second ventilation opening.

4. The variable temperature control method according to claim 3, characterized in that, the duct assembly further includes a first air damper corresponding to the first air duct and a second air damper corresponding to the second air duct; the control of the duct assembly to open the first air duct and close the second air duct includes: controlling the opening and closing of the first air damper according to the temperature of the variable temperature chamber, and controlling the second air damper to remain closed; the control of the duct assembly to open the first air duct and the second air duct includes: controlling the opening and closing of the first air damper and the second air damper according to the temperature of the variable temperature chamber.

5. The variable temperature control method according to claim 4, characterized in that, the control of the temperature of the variable temperature chamber according to 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 first air damper 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 first air damper to close.

6. The variable temperature control method according to claim 4, characterized in that, the control of the temperature of the variable temperature chamber according to 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 first air damper and the second air damper to open; When the current temperature of the variable temperature chamber is lower than the lower limit temperature of the second refrigerating temperature range, control the first air door and the second air door to close.

7. The variable temperature control method according to claim 4, wherein, the temperature control of the variable temperature chamber according to the 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, control the first air door and the second air door to open; when the current temperature of the variable temperature chamber is lower than the lower limit temperature of the freezing temperature range, control the first air door and the second air door 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, it includes 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, it includes the controller according to claim 10.

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