Variable temperature chamber structure, refrigerator, control method and computer readable storage medium

Abstract

The invention provides a variable-temperature chamber structure, a refrigerator, a control method and a computer readable storage medium, and the variable-temperature chamber structure comprises a box body which is arranged in an instant freezing chamber and is used for storing food materials, and a plurality of wall surfaces of the box body are cold conduction surfaces; the evaporator is communicated with a refrigerating system of the refrigerator and is arranged on the outer side of the cold guide surface of the refrigerator body; the air duct is formed by an air supply port and an air return port which are formed in the inner wall of the instant freezing compartment, and cold air sent out by the air duct passes through the outer side of the cold guide face of the refrigerator body. By means of the refrigerator body cold conduction face, the cold conduction disc can be directly cooled through the evaporator when the instant freezing function of the refrigerator is started; when the system enters the operation maintaining stage, the method for maintaining the temperature of the compartment through heat conduction of the independent evaporator can cause large fluctuation of the temperature in the compartment due to starting and stopping, so that the independent evaporator can be closed in the operation maintaining stage, and an air duct is opened to supply air to cool a cold guide disc or a cold guide surface of a box body; and the temperature fluctuation in the compartment is smaller.

Description

Technical Field

[0001] The present invention relates to the technical field of variable temperature chambers, and in particular to a variable temperature chamber structure, a refrigerator, a control method and a computer-readable storage medium. Background Art

[0002] With the rapid development of refrigerators and the improvement of consumers' requirements for food preservation, multifunctional refrigerators have developed rapidly. At the same time, consumers have increasingly stringent requirements for the control of food storage in refrigerators. Among them, the existing technology has a solution for instant freezing preservation. Instant freezing refers to instant freezing and making the water evenly form round ice crystal particles. The round ice crystal particles formed quickly capture and lock food cells. The round ice crystal particles are evenly distributed in the food cells, and no hard ice crystal bands are produced. They do not pierce the food cell tissue. It is a refrigeration technology method that preserves food from deterioration while preventing the loss of nutrients. The control scheme of the existing technology is divided into two types: air cooling and direct cooling. Air cooling sends air into the interior of the compartment through a separate air outlet, directly cooling the items placed in the instant freezing compartment to a preset temperature; direct cooling is cooled by direct contact between an independent evaporator and a cold plate, thereby indirectly cooling the items placed in the instant freezing compartment to a preset temperature.

[0003] In conventional air cooling methods, the air directly contacts the food, which will cause a large loss of food and affect the preservation effect. In conventional direct cooling methods, the heat exchange area between the evaporator and the cold plate is small, which will cause the temperature of the cold plate to be uneven, and the temperature difference between the room and the cold plate is large, resulting in slow cooling. Summary of the invention

[0004] In order to solve the technical problem that the single cooling method of the instant freezing compartment in the prior art does not meet the cooling demand of the instant freezing compartment, the present invention proposes a variable temperature compartment structure, a refrigerator, a control method and a computer readable storage medium.

[0005] The technical solution adopted by the present invention is:

[0006] The present invention proposes a variable temperature chamber structure, comprising:

[0007] A box body, arranged in the instant freezing chamber for storing food, wherein a plurality of wall surfaces of the box body are cold-conducting surfaces;

[0008] An evaporator is connected to the refrigeration system of the refrigerator and is arranged outside the cooling surface of the box;

[0009] The air duct is formed by an air supply port and an air return port arranged on the inner wall of the instant freezing room, and the cold air delivered by the air duct passes through the outer side of the cold conduction surface of the box body.

[0010] Furthermore, the evaporator is arranged around the four sides of the box body.

[0011] Furthermore, the air supply outlet is provided with a fan with adjustable speed.

[0012] Furthermore, the air supply port is arranged at the upper back side of the instant freezing chamber, and the cold air delivered from the air supply port first passes through the top surface of the box body.

[0013] The present invention also provides a refrigerator, comprising the above-mentioned temperature-changing chamber structure.

[0014] The present invention also provides a flash freezing control method, using the above refrigerator, comprising the steps of:

[0015] Turn on the instant freezing function;

[0016] The control system of the refrigerator controls the circuit conduction of the evaporator of the instant freezing compartment;

[0017] When the instant freezing function enters the maintenance operation stage, the circuit of the evaporator of the instant freezing compartment is closed, and the fan of the air supply port is turned on to maintain the required temperature.

[0018] Furthermore, the fan at the air outlet maintains the required temperature specifically including:

[0019] Controlling the fan to run at a preset speed X;

[0020] The temperature inside the instant freezing room is detected, and the fan is adjusted to a suitable speed according to the temperature change within a unit time t.

[0021] Furthermore, adjusting the fan to a suitable speed according to the temperature change within the unit time t specifically includes:

[0022] Determine the temperature change value T within unit time t 1 -T 2 Is it in compliance with |T 1 -T 2 |≤T 设 , T 设 is a preset value. If so, the fan is controlled to maintain the current speed; if not, according to T 1 With T 2 The fan speed is increased or decreased according to the size relationship, and then the process returns to the step of detecting the temperature inside the instant freezing room.

[0023] Furthermore, according to T 1 With T 2 The size relationship of increasing or decreasing the fan speed includes:

[0024] When T 1 Greater than T 2 , increase the fan speed X by the preset speed a,

[0025] When T 1Less than T 2 , reduce the fan speed X to a preset speed a, where a>0.

[0026] The present invention also provides a computer-readable storage medium for storing a computer program, wherein the computer program executes the above-mentioned instant freezing control method when running.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] The present invention uses the form of a cold conduction surface of the box body to cool the cold conduction plate through direct cooling of the evaporator when the instant freezing function of the refrigerator is turned on; when the system enters the maintenance operation stage, the method of continuing to maintain the temperature of the compartment through heat conduction of the independent evaporator will cause a large temperature fluctuation inside the compartment due to the start and stop of the system. Therefore, the independent evaporator can be turned off in the maintenance operation stage, and the air duct can be turned on to supply air to cool the cold conduction plate or the cold conduction surface of the box body, so that the temperature fluctuation inside the compartment is smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0031] Figure 2 is a control flow chart in an embodiment of the present invention;

[0032] Figure 3 is a control flow chart in a specific embodiment of the present invention;

[0033] Figure 4 is a temperature drop curve diagram of the instant freezing function in a specific embodiment of the present invention;

[0034] Figure 5 is a temperature maintenance range diagram in a specific embodiment of the present invention;

[0035] 1. Air outlet;

[0036] 2. Evaporator;

[0037] 3. Box body;

[0038] 4. Temperature sensor. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0041] In the prior art, instant freezing preservation schemes are widely used for freezing and preserving food, aiming to quickly lower the temperature of food to reduce nutrient loss and maintain its freshness. Conventional air-cooling cooling methods have certain problems. The air-cooling method usually uses a fan to blow cold air directly to the food. This method causes the moisture on the surface of the food to evaporate faster, resulting in dry loss, which in turn affects the preservation effect of the food. In addition, conventional direct cooling methods also have disadvantages. Since the evaporator is in direct contact with the cold plate, the heat exchange area is small, which makes the cooling effect uneven and easily leads to uneven temperature distribution of the cold plate. In addition, the temperature difference between the room and the cold plate is large, and the cooling rate is slow, which affects the refrigeration efficiency. During the maintenance operation stage, the temperature rise in the room is increased, reducing the preservation performance.

[0042] In this regard, Figure 1 As shown, the present invention proposes a variable temperature chamber structure, which can be mainly used for the instant freezing chamber of the refrigerator. The structure includes: a box, an evaporator and an air duct. The box is located in the instant freezing chamber of the refrigerator and is used to store food. The multiple walls of the box are cold-conducting surfaces with a temperature-conducting effect, which can be specifically made of metal or other temperature-conducting materials; the evaporator is connected to the refrigeration circuit of the refrigerator (specifically, it can be connected in parallel or in series with the freezing evaporator of the refrigerator. In addition, the evaporator can also be a semiconductor refrigeration evaporator, that is, a semiconductor refrigeration sheet). The evaporator is attached to the outside of the cold-conducting surface of the box, and the cold amount can be transferred to the box through the cold-conducting surface. The air duct is formed by the air supply port and the return air port arranged on the inner wall of the instant freezing chamber, that is, the original refrigeration air duct of the refrigerator is connected to the air supply port, and the cold air is sent into the instant freezing chamber through the air supply port, and then passes through the outside of the cold-conducting surface of the box, and is sent out through the return air port to the freezing evaporator of the refrigerator's refrigeration system (the dual-system refrigerator can also be a refrigeration evaporator, and the air duct structure can be set according to actual needs) for re-cooling, completing the air duct circulation of the instant freezing chamber.

[0043] That is, the present invention uses the form of the cold conduction surface of the box body to cool the cold conduction plate through the evaporator directly when the instant freezing function of the refrigerator is turned on; when the system enters the maintenance operation stage, the method of continuing to maintain the temperature of the compartment through heat conduction by the independent evaporator will cause a large temperature fluctuation inside the compartment due to the start and stop of the compressor. In the maintenance operation stage, the independent evaporator is turned off, and the air duct is turned on to supply air to cool the cold conduction plate or the cold conduction surface of the box body, so that the temperature fluctuation inside the compartment is smaller.

[0044] In a specific embodiment, the evaporator is arranged around the four sides of the box.

[0045] The evaporator can be arranged around the side walls, top wall and bottom wall of the box to ensure uniform cooling of the food in the box.

[0046] The evaporator can also be arranged only around the left and right sides of the box and the outside of the rear side wall to ensure uniform cooling of the food in the box. At the same time, when a drawer is arranged in the box, it is convenient to pull the drawer out from the front, and the top wall is reserved as the cooling surface of the air duct.

[0047] This wrap-around evaporator can maximize cooling efficiency and optimize temperature distribution to avoid uneven temperature during the cooling process. At the same time, the evaporator is in close contact with the cooling surface of the cabinet to effectively transfer the cold to the area where the food is located, ensuring rapid freezing or cooling. In addition, the wrap-around evaporator design helps improve the overall performance of the refrigeration system, reduce energy loss, and make the cooling process more efficient and energy-saving.

[0048] In a specific embodiment, a fan with adjustable speed is provided at the air outlet, and the wind speed can be adjusted through a control system (a refrigerator control system or an independently provided control module) according to temperature changes in the instant freezing room to achieve the best cooling effect.

[0049] The system can flexibly adjust the air volume according to actual needs, thereby improving cooling efficiency and avoiding excessive fluctuations in food temperature caused by excessive flow of cold air.

[0050] In a specific embodiment, in order to achieve a more efficient cooling effect of air cooling, the air supply port is arranged at the upper back side of the instant freezing chamber, and the cold air sent out from the air supply port first passes through the top surface of the box. After the cold air enters the instant freezing chamber through the air supply port, it first flows through the top surface of the box. The natural sinking characteristics of the cold air can be utilized to make the cold air evenly distributed in the box, avoiding the phenomenon of uneven temperature due to the retention of cold air. In addition, when the cold air passes through the top surface of the box, the top surface of the box is a large area, which can effectively absorb heat and quickly take away the excessively high temperature in the box, thereby improving the freezing effect of air cooling.

[0051] The present invention also provides a refrigerator using the above-mentioned variable temperature compartment structure.

[0052] By integrating the above-mentioned variable temperature compartment structure, the refrigerator not only has the refrigeration and freezing functions of a traditional refrigerator, but also has a particularly enhanced instant freezing function. The instant freezing compartment of the refrigerator achieves uniform temperature distribution through the surrounding layout of the evaporator, avoiding the uneven cooling phenomenon that may occur in traditional freezing methods. In addition, it can also switch to air cooling by setting up an air duct. When the system enters the maintenance operation stage, the independent evaporator can be turned off during the maintenance operation stage, and the air duct can be turned on to supply air to cool the cold plate or cold surface of the box, so that the temperature fluctuation in the compartment is smaller.

[0053] like Figure 2 As shown, the present invention also proposes a flash freezing control method, using the above refrigerator, comprising the steps of:

[0054] Turn on the instant freezing function, that is, when the user starts the instant freezing function of the refrigerator, the control system activates the instant freezing compartment of the refrigerator to prepare for the rapid cooling of the food;

[0055] The control system of the refrigerator controls the circuit conduction of the evaporator of the instant freezing compartment; when the instant freezing function is turned on, the control system of the refrigerator automatically adjusts the circuit conduction of the evaporator so that the refrigerant flows through the evaporator for heat exchange, thereby quickly taking away the heat in the box;

[0056] When the instant freezing function enters the maintenance operation stage, the circuit of the evaporator of the instant freezing compartment is closed, and the fan of the air supply port is turned on to maintain the required temperature;

[0057] That is, when the instant freezing function enters the maintenance operation stage, the refrigerator control system will close the circuit of the instant freezing compartment evaporator and stop the rapid cooling of the evaporator. At this time, the system switches to the fan cooling mode, and continuously sends cold air into the instant freezing compartment by turning on the fan at the air outlet to maintain the required low temperature environment. The fan stabilizes the temperature in the compartment by adjusting the wind speed to avoid excessive temperature fluctuations.

[0058] The present invention uses an evaporator to quickly cool down the food in the box of the instant freezing chamber in a cold conduction manner, and transfers cold air to the food in the box of the instant freezing chamber, ensuring that the food reaches a low temperature state in a short time and realizes rapid freezing; during the maintenance operation stage, the fan is used to ensure temperature stability to avoid excessive temperature fluctuations.

[0059] like Figure 3 As shown, in a specific embodiment, the fan at the air outlet maintains the required temperature specifically including:

[0060] Control the fan to run at a preset speed X; that is, in the maintenance operation stage, the control system of the refrigerator will first control the fan to run at a preset speed X to ensure that there is enough cold air flowing in the instant freezing room;

[0061] The temperature sensor installed in the instant freezing compartment of the refrigerator monitors the temperature changes in the instant freezing compartment in real time, and adjusts the fan to an appropriate speed according to the temperature changes within a unit time t.

[0062] The preset speed X can be optimized according to the design of the refrigerator and the type of food to ensure that the temperature change is maintained within the set range under stable cooling conditions. At this stage, the fan reduces the temperature fluctuation of the food by evenly distributing the cold air, avoiding temperature instability caused by too little or too much cold air.

[0063] The control system dynamically adjusts the fan speed based on the detected temperature data and the temperature changes within a unit time t. For example, if the indoor temperature of the flash freezer rises, the control system will automatically increase the fan speed to accelerate the flow of cold air and quickly take away excess heat; conversely, if the temperature changes tend to be stable, the fan speed will be appropriately reduced to save energy and maintain a constant cooling environment.

[0064] Therefore, the refrigerator can flexibly adjust the fan speed according to the actual temperature requirements, so as to more accurately maintain the temperature stability in the instant freezing room. This control method not only improves energy efficiency, but also ensures the freezing quality of food, and achieves more efficient and accurate temperature control while reducing energy consumption.

[0065] In a specific embodiment, adjusting the fan to a suitable speed according to the temperature change within a unit time t specifically includes:

[0066] Determine the temperature change value T within unit time t 1 -T 2 Is it in compliance with |T 1 -T 2 |≤T 设 , T 设 is the preset value; that is, in this step, the refrigerator control system will compare the current temperature T in the instantaneous freezing room 1 and the temperature T at the previous moment 2 If the temperature change per unit time t |T 1 -T 2 |Less than or equal to the preset value T 设 , indicating that the temperature change is stable and the system believes that the current temperature fluctuation is within the allowable range;

[0067] If the judgment result is that the temperature change is within the preset range, the control system will not make any fan speed adjustment and continue to maintain the current speed to ensure that the indoor temperature of the instant freezing room remains stable and avoid excessive adjustment of the fan speed.

[0068] If not, according to T 1 With T 2The fan speed is increased or decreased according to the size relationship, and then the process returns to the step of detecting the temperature inside the instant freezing room.

[0069] Through this dynamic temperature adjustment method, the refrigerator can achieve precise temperature control, maintain the stability of the indoor temperature of the instant freezing room, ensure the best freezing effect of food, and effectively reduce energy consumption and improve system efficiency.

[0070] Specifically, if the judgment result shows that the temperature change exceeds the preset allowable range, that is, |T 1 -T 2 |>T 设 , the control system will further adjust the fan speed according to the direction of temperature change. 1 >T 2 (temperature rises), the fan speed will be increased to increase the flow of cold air to reduce the temperature faster; if T 1 <T 2 (Temperature drops), the fan speed will be reduced to avoid overcooling and ensure that the temperature is maintained within the set range. After adjusting the fan speed, the control system will continue to detect temperature changes in the instant freezing room and adjust again according to the new temperature data.

[0071] T 设 It can be set according to actual needs, for example, set to 0.5°C.

[0072] like Figure 4 As shown, it should be noted that the instant freezing function includes multiple stages, including the supercooling environment preparation stage, the supercooling introduction stage, the supercooling maintenance stage, and the maintenance operation stage. In each stage, the system's cooling method is different to ensure that the instant freezing task can be completed efficiently and accurately.

[0073] Supercooling environment preparation stage:

[0074] At this stage, the system is ready to quickly lower the temperature of the instant freezing compartment in order to enter the supercooling introduction stage. The outer wall of the box is only directly cooled by the independent evaporator, that is, the independent evaporator is directly in contact with the outer wall of the box, and the heat is taken away by the refrigerant circulation, so that the outer wall temperature of the box is rapidly reduced. At this time, the direct cooling method of the evaporator accelerates the cooling.

[0075] Subcooling introduction stage:

[0076] In the supercooling introduction stage, the system continues to use the direct cooling effect of the independent evaporator to further reduce the temperature of the outer wall of the box to ensure that the temperature quickly reaches the predetermined low temperature state. In this stage, the direct cooling effect is more significant, the temperature changes greatly, and it quickly enters the supercooling state.

[0077] Supercooling maintenance stage:

[0078] When the supercooling process is completed, the system enters the supercooling maintenance stage, and the temperature of the outer wall of the box has stabilized in the low temperature range. At this time, the system still maintains a low temperature environment through the direct cooling of the independent evaporator to ensure the continuity and stability of the freezing effect.

[0079] Maintaining operation phase:

[0080] When the system enters the maintenance operation stage, the circuit of the independent evaporator will be closed and the direct cooling function will be stopped. In this stage, the temperature of the outer wall of the cabinet is mainly maintained by the air supplied by the fan. The fan continuously circulates the air to send cold air into the instant freezing room, cools the cold plate or cold surface, and thus maintains the required low temperature environment. Since air cooling can reduce direct energy consumption and is more uniform than direct cooling, the system adjusts the wind speed through the fan to maintain a constant temperature to avoid excessive cooling or excessive temperature fluctuations.

[0081] like Figure 5 As shown, when entering the maintenance operation stage, if the evaporator direct cooling is still used, the temperature fluctuation range of the box is between -4℃ and -8℃; if air cooling is used, the temperature fluctuation range of the box is between -5.5℃ and -6.5℃;

[0082] Through this multi-stage instant freezing control method, the system can flexibly switch the cooling mode at different stages, which not only ensures the rapid achievement of the freezing effect, but also ensures that the energy consumption and temperature fluctuations are minimized during the maintenance stage, thereby improving the freezing efficiency and the overall performance of the system.

[0083] The present invention also provides a computer-readable storage medium for storing a computer program, wherein the computer program executes the instant freezing control method when running.

[0084] In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented as a computer program product in software, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Computer-readable media include both computer storage media and communication media, including any medium that facilitates the transfer of a computer program from one place to another. Storage media may be any available medium that can be accessed by a computer. As an example and not limitation, such a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer. Any connection is also properly referred to as a computer-readable medium. For example, if the software is transmitted from a website, a server, or other remote source using a coaxial cable, a fiber optic cable, a twisted pair, a digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of the medium. Disk and disc as used herein include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disk often reproduces data magnetically, while disc reproduces data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0085] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0086] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0087] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0088] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

Claims

1. A variable temperature chamber structure, characterized in that: include: A box body, arranged in the instant freezing chamber for storing food, wherein a plurality of wall surfaces of the box body are cold-conducting surfaces; An evaporator is connected to the refrigeration system of the refrigerator and is arranged outside the cooling surface of the box; The air duct is formed by an air supply port and an air return port arranged on the inner wall of the instant freezing room, and the cold air delivered by the air duct passes through the outer side of the cold conduction surface of the box body.

2. The variable temperature chamber structure according to claim 1, characterized in that: The evaporator is arranged around the four sides of the box body.

3. The variable temperature chamber structure according to claim 1, characterized in that: The air supply port is provided with a fan with adjustable speed.

4. The variable temperature chamber structure according to claim 1, characterized in that: The air supply port is arranged at the upper back side of the instant freezing chamber, and the cold air supplied from the air supply port first passes through the top surface of the box body.

5. A refrigerator, characterized in that: The invention comprises a temperature-variable chamber structure as claimed in any one of claims 1 to 4.

6. A flash freezing control method, characterized in that: Using the refrigerator as claimed in claim 5 comprises the steps of: Turn on the instant freezing function; The control system of the refrigerator controls the circuit conduction of the evaporator of the instant freezing compartment; When the instant freezing function enters the maintenance operation stage, the circuit of the evaporator of the instant freezing compartment is closed, and the fan of the air supply port is turned on to maintain the required temperature.

7. The instant freezing control method according to claim 6, characterized in that: The fan at the air outlet maintains the required temperature specifically including: Controlling the fan to run at a preset speed X; The temperature inside the instant freezing room is detected, and the fan is adjusted to a suitable speed according to the temperature change within a unit time t.

8. The instant freezing control method according to claim 7, characterized in that: Adjusting the fan to a suitable speed according to the temperature change within unit time t specifically includes: Determine whether the temperature change value T1-T2 within the unit time t meets |T1-T2|≤T 设 , T 设 is a preset value, if so, control the fan to maintain the current speed; if not, increase or decrease the fan speed according to the relationship between T1 and T2, and then return to the step of detecting the temperature inside the instant freezing room.

9. The instant freezing control method according to claim 8, characterized in that: Increasing or decreasing the fan speed according to the relationship between T1 and T2 includes: When T1 is greater than T2, the fan speed X is increased by the preset speed a. When T1 is less than T2, the fan speed X is reduced by a preset speed a, and a>0.

10. A computer-readable storage medium for storing a computer program, characterized in that: When the computer program is executed, the instant freezing control method according to any one of claims 6 to 9 is executed.

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