Refrigerator and control method thereof

Abstract

The invention relates to a refrigerator and a control method thereof, the refrigerator comprises a sugar control device, and the sugar control device comprises a storage piece and an ultrasonic generation device. The storage piece is used for storing a target object to be subjected to sugar control; the ultrasonic generation device is arranged on the outer side wall of the storage part to conduct ultrasonic treatment on the target object in the storage part, and then generation of resistant starch in the target object is promoted. According to the refrigerator, ultrasonic treatment can be conducted on the target object in the storage piece through the ultrasonic generation device, generation of resistant starch in the target object is promoted, and therefore the sugar control requirement of a user can be met, and the use experience of the user is improved.

Description

Technical Field

[0001] This application relates to the field of refrigerator technology, and in particular to a refrigerator and its control method. Background Technology

[0002] In my country, most residents rely on high-starch foods such as rice and steamed buns as their staple diet. These foods contain a very high proportion of starch that can be quickly digested and absorbed by the body, easily leading to a sharp rise in post-meal blood sugar, which is detrimental to long-term blood sugar stability and weight control. Therefore, controlling sugar intake has become a growing and widespread need.

[0003] Refrigerators, as a common household appliance for food storage, are an ideal intervention scenario for achieving dietary blood sugar control goals. However, current refrigerator technology primarily focuses on preservation and spoilage prevention, lacking functions to meet users' blood sugar control needs. Therefore, how to process food in the refrigerator to meet users' blood sugar control requirements has become an urgent technical problem to be solved. Summary of the Invention

[0004] Therefore, it is necessary to provide a refrigerator that addresses the above-mentioned problems and solves the issue that existing refrigerators cannot properly process food to meet users' sugar control needs.

[0005] On one hand, this application provides a refrigerator, including a sugar control device, which includes: a storage unit for storing a target substance to be controlled for sugar; and an ultrasonic generator disposed on the outer wall of the storage unit to ultrasonically treat the target substance in the storage unit, thereby promoting the production of resistant starch in the target substance.

[0006] Optionally, the ultrasonic generator is located below the storage unit.

[0007] Optionally, the ultrasound generating device includes multiple ultrasound modules arranged in an array.

[0008] Optionally, the refrigerator may also include a protective device connected to the storage unit, and an ultrasonic generator enclosed between the protective device and the storage unit.

[0009] Optionally, the storage component includes: a body that is retractably disposed in the refrigerator compartment; an opening on the top of the body; and a cover disposed on the top of the body to cover the opening when the body enters the refrigerator compartment.

[0010] Optionally, a first air inlet is provided on the rear side of the cold storage compartment to continuously blow in cold air; a ventilation component is provided between the cover and the main body, and an air duct is provided at the ventilation component. The air duct includes a second air inlet and an air outlet. The first air inlet and the second air inlet are connected so that the air blown in by the first air inlet passes through the second air inlet and is blown into the air duct, and then blown into the main body through the air outlet.

[0011] Optionally, the ventilation component includes: an air duct forming member having a groove of a predetermined shape formed on one side; an air duct cover plate covering the side of the air duct forming member where the groove is formed, so as to close the groove to form an air duct; a second air inlet is formed at one end of the air duct near the first air inlet; and at least one through hole corresponding to the position of the groove is provided on the air duct cover plate to form an air outlet.

[0012] Optionally, there may be multiple through holes, which are evenly distributed on the duct cover.

[0013] Optionally, a temperature sensor is also installed at the duct cover to detect the temperature inside the main body in real time.

[0014] Optionally, a resistant starch content analyzer is installed at the duct cover to detect the resistant starch content in the target material within the main body in real time.

[0015] On the other hand, this application also provides a control method for the aforementioned refrigerator, comprising: controlling the activation of an ultrasonic generator in response to the action of placing a target object in a storage container; detecting the content of resistant starch in the target object; and deactivating the ultrasonic generator when the content of resistant starch in the target object decreases.

[0016] Optionally, the ultrasonic generator has an ultrasonic frequency of 20K~500K and a power of 100~400W.

[0017] Optionally, the steps for detecting the content of resistant starch in the target substance include: detecting the content of resistant starch in the target substance in real time, or detecting the content of resistant starch in the target substance periodically.

[0018] Optionally, in response to the action of placing the target object into the storage device, after controlling the start of the ultrasonic generator, the method further includes: real-time detection of a first temperature of the target object and a second temperature of the ultrasonic generator; when the first temperature is greater than or equal to a first preset temperature or when the second temperature is greater than or equal to a second preset temperature, starting to blow air into the storage device; when the first temperature is less than the first preset temperature and the second temperature is less than the second preset temperature, stopping the blowing air into the storage device.

[0019] The embodiments provided in this application, by setting a sugar control device in the refrigerator, and setting a storage component and an ultrasonic generator in the sugar control device, the ultrasonic generator can perform ultrasonic treatment on the target material in the storage component to promote the production of resistant starch in the target material, thereby meeting the user's sugar control needs and improving the user's experience. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a refrigerator provided in one embodiment of this application;

[0021] Figure 2 for Figure 1 Exploded view of the structure of a refrigerator;

[0022] Figure 3 for Figure 1 Exploded view of the central ventilation component;

[0023] Figure 4 for Figure 1 Exploded view of the central ventilation component from another direction;

[0024] Figure 5 A schematic flowchart illustrating a refrigerator control method provided in some embodiments of this application;

[0025] Figure 6 This is a graph showing the change in resistant starch content at different ultrasonic frequencies in some embodiments of this application;

[0026] Figure 7 This is a graph showing the variation of resistant starch content under different power levels in some embodiments of this application;

[0027] Figure 8 This is a graph showing the change in resistant starch content at different working times in some embodiments of this application;

[0028] Figure 9 This is a schematic flowchart illustrating a refrigerator control method provided in some other embodiments of this application.

[0029] Explanation of reference numerals in the attached figures

[0030] 1000, Refrigerator; 100, Sugar control device; 110, Storage component; 111, Main body; 112, Cover plate; 120, Ultrasonic generator; 121, Ultrasonic module; 200, Protective device; 300, Refrigerated compartment; 310, First air inlet; 400, Ventilation component; 410, Air duct; 420, Second air inlet; 430, Air duct forming component; 431, Groove; 440, Air duct cover plate; 450, Through hole; 460, Air outlet. Detailed Implementation

[0031] To make the technical solution and beneficial effects of this application more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0032] Understandably, the need for blood sugar control refers to managing blood sugar fluctuations caused by food consumption. Blood sugar refers to the glucose content in the blood. Sugars in food (monosaccharides, disaccharides, and starch) are the main source of blood sugar. Among starches, there are five types of resistant starch (RS1-RS5), including encapsulated starch RS1, natural starch granules RS2, retrograded starch RS3, chemically modified starch RS4, and amylose-lipid complex RS5. These resistant starches are not easily absorbed by the body but can increase satiety. Therefore, increasing the content of these resistant starches in food can meet the user's blood sugar control needs.

[0033] Researchers have discovered that starch is prone to retrogradation at low temperatures, which can increase the content of retrograded starch (RS3). Simultaneously, ultrasound technology can emit high-frequency sound waves into food, utilizing cavitation to generate extremely strong local shear forces that break down amylopectin, producing more short amylose fragments. Ultrasound can also disrupt the structure of starch granules, increasing the dissolution of amylose. Furthermore, ultrasound can promote more uniform mixing of various substances, thereby facilitating the formation of the amylose-lipid complex RS5. Therefore, using ultrasound technology to process food in the refrigerator can effectively increase the content of resistant starch, thus meeting users' sugar control needs.

[0034] refer to Figures 1 to 4 This application provides a refrigerator 1000, which may include a sugar control device 100. The sugar control device 100 includes a storage unit 110 and an ultrasonic generator 120. The storage unit 110 is used to store the target substance whose sugar content needs to be controlled. The ultrasonic generator 120 is disposed on the outer wall of the storage unit 110 to ultrasonically treat the target substance within the storage unit 110, thereby promoting the production of resistant starch within the target substance.

[0035] Understandably, the target object can be any starchy food such as raw rice, cooked rice, dough, or potatoes. Furthermore, because ultrasound has good directionality and penetrability, it can penetrate the sidewalls of the storage unit 110 and reach inside, thus allowing for ultrasonic treatment of the target object inside the storage unit 110.

[0036] The refrigerator 1000 described above, by setting a sugar control device 100 inside the refrigerator 1000, and setting a storage unit 110 and an ultrasonic generator 120 inside the sugar control device 100, the ultrasonic generator 120 can perform ultrasonic treatment on the target object inside the storage unit 110 to promote the production of resistant starch in the target object, thereby meeting the user's sugar control needs and improving the user's user experience.

[0037] Furthermore, in this embodiment, the ultrasonic generator 120 is disposed on the outer wall of the storage unit 110, which allows the ultrasonic waves emitted by the ultrasonic generator 120 to propagate into the storage unit 110 via the solid side wall to act on the target object. Solid propagation results in relatively small energy attenuation of the ultrasonic waves, thereby improving the efficiency of ultrasonic processing.

[0038] refer to Figure 1 In this embodiment, the ultrasonic generator 120 is disposed below the storage device 110. The advantage of this arrangement is that it increases the effective area of ​​the ultrasonic waves acting on the target object, thereby improving the efficiency of ultrasonic processing.

[0039] Specifically, when a user places raw rice, potatoes, or other target items into the storage container 110, the items may naturally accumulate at the bottom due to gravity, while the middle and top may not be completely filled. If the ultrasonic generator 120 is located on the side wall of the storage container 110, the effective area of ​​the ultrasonic waves acting on the target items will be mainly limited to the sides of the bottom material, resulting in low ultrasonic processing efficiency. However, in this embodiment, the refrigerator 1000 places the ultrasonic generator 120 below the storage container 110, allowing the ultrasonic waves to propagate vertically upwards and directly act on the densest bottom material, resulting in a larger effective area and thus improving the efficiency of ultrasonic processing.

[0040] It is understood that the position of the ultrasonic generator 120 in this embodiment is exemplary, and in some other embodiments, the ultrasonic generator 120 may also be positioned in other locations. For example, the ultrasonic generator 120 may be positioned on the outer side walls of the storage member 110.

[0041] refer to Figure 2 In this embodiment, the ultrasonic generator 120 includes a plurality of ultrasonic modules 121 arranged in an array. The array arrangement allows the ultrasonic waves emitted by the ultrasonic modules 121 to be more evenly distributed on the target object within the storage device 110, thereby making the ultrasonic generator 120 more efficient in ultrasonic processing of the target object.

[0042] refer to Figure 2 In this embodiment, the refrigerator 1000 further includes a protective device 200, which is connected to the storage unit 110 and encloses the ultrasonic generator 120 between the protective device 200 and the storage unit 110. The protective device 200 can prevent moisture from entering the ultrasonic generator 120, thereby reducing the risk of failure of the ultrasonic generator 120 due to moisture and improving the reliability of the refrigerator 1000.

[0043] In addition, the protective device 200 can also prevent the ultrasonic generator 120 from being exposed to the outside, reducing the risk of it being damaged by external forces. For example, when the storage unit 110 is configured as a pull-out drawer structure, the ultrasonic generator 120 is likely to passively collide with other structures of the refrigerator 1000 when the user pulls out the storage unit 110. The protective device 200 can reduce the risk of damage caused by such collisions.

[0044] refer to Figure 1 and Figure 2 The storage component 110 in this embodiment may include a main body 111 and a cover 112. The main body 111 is retractably disposed in the refrigerator compartment 300 of the refrigerator 1000. The main body 111 has an opening at the top. The cover 112 is disposed above the main body 111 to cover the opening when the main body 111 enters the refrigerator compartment 300.

[0045] It is understandable that "refrigeration compartment 300" refers to the compartment in the refrigerator used for refrigeration, such as... Figure 1 As shown, the main body 111 is located inside the refrigerator compartment 300. In this embodiment, "above" refers to the vertical direction above when the refrigerator is placed vertically during normal use.

[0046] In this embodiment, the main body 111 and the cover plate 112 can cooperate to form a closed storage space for the user to store the target object in the storage device 110.

[0047] Furthermore, the advantage of this enclosed space is that the cover 112 can reflect the ultrasonic waves emitted by the ultrasonic generator 120, thereby isolating the ultrasonic treatment from interference with the external space, including the effect of the heat generated by the ultrasonic treatment on the local temperature inside the cold storage compartment 300, and the effect of the ultrasonic waves on the preservation quality of the stored items inside the cold storage compartment 300, so as to ensure that the refrigeration function of the cold storage compartment 300 works normally.

[0048] In addition, in this embodiment, the main body 111 is designed to be pull-out and the opening is located at the top, which allows the user to easily interact with the storage component 110 to store and retrieve the target object, thereby improving the convenience of the refrigerator 1000.

[0049] refer to Figures 2 to 4In this embodiment, a first air inlet 310 is provided on the rear side of the cold storage compartment 300 to continuously blow in cold air. A ventilation component 400 is provided between the cover plate 112 and the main body 111. An air duct 410 is provided at the ventilation component 400. The air duct 410 includes a second air inlet 420 and an air outlet 460. The first air inlet 310 and the second air inlet 420 are connected so that the gas blown in by the first air inlet 310 passes through the second air inlet 420 and is blown into the air duct 410, and then blown into the main body 111 through the air outlet 460. The blown in cold air can cool down the target object in the storage container 110, ensuring that the target object is stored in a low-temperature environment, avoiding the target object from deteriorating, thereby improving the preservation effect.

[0050] Specifically, the ultrasonic generator 120 generates heat during operation, causing localized heat buildup in the storage container 110. This leads to an increase in temperature within the storage container 110, potentially causing spoilage of the contents. Therefore, in this embodiment, a first air inlet 310 is provided at the rear of the cold storage compartment 300, which can blow cold air into the storage container 110 to cool the contents, thereby reducing the risk of spoilage and improving preservation.

[0051] Furthermore, storing the target material in a low-temperature environment can promote the formation of retrograde starch of RS3 in the target material, enabling the refrigerator 1000 to perform sugar control treatment on the target material more quickly.

[0052] Furthermore, in this embodiment, a ventilation component 400 is also provided between the cover plate 112 and the main body 111. The ventilation component 400, through the internal groove 431, the first air inlet 310, and the air outlet 460, can limit the direction of the air duct 410, so that the cold air is blown evenly to all directions inside the main body 111, thereby improving the uniformity of cooling.

[0053] refer to Figure 3 and Figure 4 The ventilation component 400 includes an air duct forming component 430 and an air duct cover plate 440. The air duct forming component 430 has a groove 431 of a predetermined shape formed on its bottom side. The air duct cover plate 440 covers one side of the air duct forming component 430 where the groove 431 is located, thereby closing the groove 431 to form an air duct 410. A second air inlet 420 is formed at one end of the air duct 410 near the first air inlet 310. The air duct cover plate 440 has a plurality of through holes 450 corresponding to the positions of the groove 431 to form an air outlet 460. The air duct forming component 430 and the air duct cover plate 440 can be fastened together to form the air duct 410, thereby delivering cold air from the first air inlet 310 to the air outlet 460.

[0054] Furthermore, in this embodiment, the predetermined shape of the groove 431 is an irregular shape with three branches, and each branch gradually diffuses from the position of the second air inlet 420. This arrangement enables the cold air to be distributed to various parts of the air duct forming member 430, making the distribution of cold air more uniform and thus improving the cooling effect.

[0055] It is understood that the air duct forming component 430 can be fastened through various methods such as snap-fit, adhesive, or bolt connection, and no specific method is limited here. Furthermore, it is understood that the preset shape of the groove 431 in this embodiment is exemplary; in other embodiments, the preset shape may also be a combination of one or more regular or irregular shapes.

[0056] Optionally, the air duct forming element 430 can be a foam board. The advantage of the foam board is that it has a better thermal insulation effect, which helps to maintain a low temperature environment inside the storage element 110, so as to provide a suitable temperature environment for the generation of resistant starch.

[0057] In addition, foam boards have the advantage of easy processing, making it easier to process and form grooves 431 of a preset shape, thereby reducing the processing cost of the air duct forming part 430.

[0058] refer to Figure 3 and Figure 4 In this embodiment, there are six through holes 450, which are evenly distributed on the air duct cover plate 440. These through holes 450 correspond to the grooves 431 on the air duct forming member 430, which allows cold air to enter the main body 111 more evenly, thereby improving the cooling effect.

[0059] It is understood that the number of through holes 450 in this embodiment is exemplary. In other embodiments, the number of through holes 450 may also be set to other numbers, such as 8 or 9.

[0060] In this embodiment, a temperature sensor (not shown) is also provided at the air duct cover 440 to detect the temperature value inside the main body 111 in real time. This allows the refrigerator 1000 to adjust the actual temperature inside the storage unit 110 according to the temperature value detected by the temperature sensor, thereby keeping the target material at the optimal temperature range for resistant starch formation, and thus improving the sugar control effect of the sugar control device 100.

[0061] In this embodiment, a resistant starch content analyzer (not shown) is installed at the air duct cover 440 to detect the resistant starch content of the target material inside the main body 111 in real time. This allows the refrigerator 1000 to obtain the resistant starch content of the target material in real time, thereby enabling it to tailor the operation mode of the ultrasonic generator (such as operating time and power) to ensure that the resistant starch content of the target material remains stable within the target range, thus improving the accuracy of the sugar control effect of the sugar control device 100.

[0062] refer to Figure 5 Some embodiments of this application also provide a control method applied to the aforementioned refrigerator, the control method comprising:

[0063] S101, in response to the action of placing the target object into the storage device, controls the start of the ultrasonic generator.

[0064] S102, detects the content of resistant starch in the target substance.

[0065] S103, the ultrasonic generator is turned off when the resistant starch content in the target material decreases.

[0066] The above control method, by activating the ultrasonic generator after the target object is placed in the storage device, promotes the production of resistant starch in the target object, thereby meeting the user's sugar control needs and improving the user experience.

[0067] Furthermore, the aforementioned control method can detect the content of resistant starch in the target material and shut down the ultrasonic generator when the content of resistant starch in the target material decreases. This enables the control method to accurately control the content of resistant starch in the target material, thereby improving the control accuracy of the control method and better meeting the user's requirements for the content of resistant starch in the target material.

[0068] In some embodiments, the ultrasonic frequency of the ultrasonic generator is 20K~500KHz and the power is 100~400W.

[0069] Specifically, refer to Figure 6 Experiments have shown that both excessively high and low ultrasonic frequencies lead to a decrease in the relative content of resistant starch. Similarly, refer to... Figure 7 Excessively high or low ultrasonic power can also lead to a decrease in the relative content of resistant starch. Therefore, according to Figure 6 and Figure 7 Based on experimental results, the control method in this embodiment sets the ultrasonic frequency of the ultrasonic generator to 20K~500KHz and the power to 100~400W. Ultrasonic waves within this frequency and power range have a better promoting effect on the formation of resistant starch in the target material, thus improving the ultrasonic treatment effect of the control method on the target material.

[0070] Optional, see reference Figure 8 Experiments show that the relative content of resistant starch production varies depending on the operating time of the ultrasonic generator. For example... Figure 8 As shown, the relative content of resistant starch remains essentially unchanged when the ultrasonic generator operates for more than 15 minutes. Therefore, the operating time of the ultrasonic generator can be set to 15 minutes each time. This not only ensures the ultrasonic treatment effect but also reduces the ineffective operating time of the ultrasonic generator, achieving energy-saving effects.

[0071] Optionally, the step of detecting the resistant starch content in the target analyte includes: detecting the resistant starch content in the target analyte in real time, or detecting the resistant starch content in the target analyte periodically. Both methods can achieve the detection of resistant starch. Real-time detection improves the control timeliness and accuracy of the control method. Periodic detection reduces the detection frequency and lowers detection costs, thereby reducing the implementation cost of the control method.

[0072] refer to Figure 9 In some embodiments, after step S101 controls the activation of the ultrasonic generator in response to the action of placing the target object into the storage device, the control method further includes:

[0073] S201, real-time detection of the first temperature of the target object and the second temperature of the ultrasonic generator.

[0074] S202, when the first temperature is greater than or equal to the first preset temperature or when the second temperature is greater than or equal to the second preset temperature, air is blown into the storage device.

[0075] S203, when the first temperature is lower than the first preset temperature and the second temperature is lower than the second preset temperature, stop blowing air into the storage device.

[0076] It is understandable that both the first preset temperature and the second preset temperature are pre-set, suitable storage temperatures for the target object. For example, both the first preset temperature and the second preset temperature can be set between 1°C and 5°C.

[0077] The above control method can keep the temperature of the target object below the first preset temperature, ensuring that the target object is kept in a suitable temperature environment, thereby ensuring the preservation effect of the target object, and promoting the formation of retrograde starch in the target object.

[0078] Furthermore, since the ultrasonic generator inevitably generates heat during operation, its temperature will be higher than the overall temperature of the target object. This can easily cause overheating and spoilage in localized areas of the target object near the ultrasonic generator. Therefore, the above control method also controls the temperature of the ultrasonic generator below a second preset temperature to ensure that the operating temperature of the ultrasonic generator is also within a safe range, reducing the risk of spoilage in localized areas of the target object and further improving the preservation effect of the target object.

[0079] In this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0080] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" may explicitly include at least one of those features. In this application, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise explicitly specified.

[0081] In this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0082] In this application, unless otherwise expressly defined, the terms "above," "on top of," "over," "above," "below," "below," "below," or "below" for "first feature over second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "over," and "below" for "first feature over second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature over second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0083] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. A refrigerator, characterized in that, Includes a blood sugar control device, the blood sugar control device comprising: Storage components, used to store the target substance for sugar control; and An ultrasonic generator is disposed on the outer wall of the storage unit to ultrasonically treat the target material within the storage unit, thereby promoting the production of resistant starch within the target material.

2. The refrigerator according to claim 1, characterized in that, The ultrasonic generator is located below the storage device.

3. The refrigerator according to claim 1, characterized in that, The ultrasonic generator includes multiple ultrasonic modules arranged in an array.

4. The refrigerator according to claim 1, characterized in that, It also includes a protective device connected to the storage unit and enclosing the ultrasonic generator between the protective device and the storage unit.

5. The refrigerator according to claim 1, characterized in that, The storage device includes: The main body is retractably installed in the refrigerator's cold compartment; the main body has an opening at its top; A cover is disposed above the main body to cover the opening when the main body enters the cold storage compartment.

6. The refrigerator according to claim 5, characterized in that, The rear side of the cold storage compartment is provided with a first air inlet to continuously blow in cold air; A ventilation component is provided between the cover plate and the main body. An air duct is provided at the ventilation component. The air duct includes a second air inlet and an air outlet. The first air inlet is connected to the second air inlet so that the gas blown in by the first air inlet passes through the second air inlet into the air duct and then is blown into the main body through the air outlet.

7. The refrigerator according to claim 6, characterized in that, The ventilation component includes: The air duct forming component has a groove of a predetermined shape formed on one side; A duct cover is provided on the side of the duct forming member where the groove is provided, so as to close the groove to form the duct; a second air inlet is formed at the end of the duct near the first air inlet; at least one through hole corresponding to the position of the groove is provided on the duct cover to form the air outlet.

8. The refrigerator according to claim 7, characterized in that, The number of through holes is multiple, and the multiple through holes are evenly distributed on the air duct cover plate.

9. The refrigerator according to claim 7, characterized in that, A temperature sensor is also installed at the duct cover to detect the temperature inside the main body in real time.

10. The refrigerator according to claim 7, characterized in that, A resistant starch content analyzer is installed at the air duct cover to detect the resistant starch content in the target material within the main body in real time.

11. A control method for a refrigerator according to any one of claims 1-10, characterized in that, include: In response to the action of placing the target object into the storage device, the ultrasonic generator is activated. The content of resistant starch in the target material was detected; The ultrasonic generator is turned off when the resistant starch content in the target material decreases.

12. The refrigerator control method according to claim 11, characterized in that, The ultrasonic generator has an ultrasonic frequency of 20K~500K and a power of 100~400W.

13. The refrigerator control method according to claim 11, characterized in that, The steps for detecting the content of resistant starch in the target material include: The content of resistant starch in the target material can be detected in real time or periodically.

14. The refrigerator control method according to claim 11, characterized in that, Following the step of controlling the activation of the ultrasonic generator in response to the action of placing the target object into the storage device, the method further includes: Real-time detection of the first temperature of the target object and the second temperature of the ultrasonic generator; When the first temperature is greater than or equal to the first preset temperature or when the second temperature is greater than or equal to the second preset temperature, air is blown into the storage device. When the first temperature is lower than the first preset temperature and the second temperature is lower than the second preset temperature, the blowing into the storage device is stopped.

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