Fresh-keeping drawer and refrigerator

Abstract

The utility model relates to a fresh-keeping drawer and a refrigerator. The fresh-keeping drawer comprises a drawer frame; the drawer bucket is movably arranged on the drawer frame; the electromagnetic sealing assembly comprises a metal decoration strip and an electromagnet, the metal decoration strip is arranged on the side, facing the drawer bucket, of the drawer frame, and the electromagnet is arranged at the end, close to the drawer frame, of the drawer bucket; when the drawer bucket and the drawer frame are relatively closed, the electromagnet generates magnetic attraction force with the metal decoration strip after being electrified, so that the drawer bucket and the drawer frame are tightly matched under the action of the magnetic attraction force. By means of the magnetic attraction force generated between the electromagnet and the metal decoration strip, the sealing performance between the drawer bucket and the drawer frame can be improved, external air is prevented from entering the inner space of the drawer frame from a gap between the drawer bucket and the drawer frame, and then the fresh-keeping effect of food materials is guaranteed.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and in particular to a food preservation drawer and refrigerator. Background Technology

[0002] With societal progress and rising consumer spending power, consumers have increasingly higher demands for food preservation. Refrigerators and other household appliances have become indispensable. To improve food freshness, vacuum-sealed food drawers have emerged on the market. These drawers use a vacuum pump to extract air from the drawer frame, creating a low-oxygen, low-pressure environment to control oxygen levels and preserve food. However, this extraction creates a pressure difference between the inside and outside of the drawer frame, and the greater the pressure difference, the more difficult it is to maintain the drawer's airtightness.

[0003] In related technologies, it is impossible to ensure airtightness simply by relying on the sealing ring to adhere tightly to the drawer frame. Some food storage drawers use torsion springs to press the sealing ring against the drawer frame, while the vent holes are also sealed by the pressure relief valve through the compression force of the torsion spring. However, the torsion spring will accumulate fatigue damage with repeated use. Under repeated loads, tiny cracks will initiate inside the torsion spring and gradually expand, eventually leading to its failure. Therefore, it is evident that the sealing effect of this mechanical sealing structure will decrease with repeated use, resulting in a progressively worse airtightness of the drawer. Utility Model Content

[0004] This application provides a food preservation drawer and refrigerator to solve the technical problem that the sealing effect of the mechanical sealing structure of existing vacuum drawers decreases with repeated use, resulting in increasingly poor drawer sealing and affecting the food preservation effect.

[0005] In a first aspect, this application provides a food storage drawer, comprising:

[0006] Drawer frame;

[0007] A drawer drawer is movably mounted on the drawer frame;

[0008] An electromagnetic sealing assembly includes a metal decorative strip and an electromagnet, wherein the metal decorative strip is disposed on the side of the drawer frame facing the drawer drawer, and the electromagnet is disposed on the end of the drawer drawer close to the drawer frame;

[0009] When the drawer and the drawer frame are closed relative to each other, the electromagnet generates a magnetic attraction force with the metal decorative strip after being energized, so that the drawer and the drawer frame fit tightly together under the action of the magnetic attraction force.

[0010] In one possible implementation, the drawer includes a faceplate, a drawer body, and a sealing ring. The faceplate includes a first receiving cavity, and the electromagnet is disposed within the first receiving cavity. The drawer body is disposed on the side of the faceplate facing the drawer frame. The sealing ring is disposed on the side of the faceplate facing the drawer frame and surrounds the periphery of the drawer body.

[0011] In one possible implementation, the mask includes a front cover and a rear cover, the front cover being fitted around the periphery of the rear cover, the electromagnet being disposed on the side of the front cover facing the rear cover, and the front cover having a first cover plate for fixing the electromagnet.

[0012] In one possible implementation, the rear cover has a first annular groove on the side facing the drawer frame, and the sealing ring is disposed on the first annular groove. The orthographic projection of the sealing ring on the vertical plane covers the orthographic projection of the metal decorative strip on the vertical plane.

[0013] In one possible implementation, a first accommodating cavity is provided between the front cover and the rear cover, a first through hole communicating with the first accommodating cavity is provided on the bucket body, a second through hole communicating with the first accommodating cavity is provided on the front cover, and a pressure relief valve is provided on the second through hole, the pressure relief valve having a first state of opening the second through hole and a second state of closing the second through hole.

[0014] In one possible implementation, the pressure relief valve includes a first sleeve, a valve core, and a top cover. One end of the valve core passes through the first sleeve and is connected to the top cover. A spring is sleeved around the valve core. A first end of the spring is connected to the valve core, and a second end of the spring is connected to the top cover.

[0015] The front cover has a support cylinder at the first through hole. The first end of the support cylinder is connected to the front cover, and the second end of the support cylinder extends into the first accommodating cavity. The first sleeve is disposed on the support cylinder, and the top cover is closed on the second end of the support cylinder.

[0016] In one possible implementation, the drawer frame has a second annular groove on the side facing the drawer drawer, and the metal decorative strip is disposed on the second annular groove.

[0017] In one possible implementation, a second cover plate is provided on the drawer frame, and an operation panel and a display screen are provided on the side of the second cover plate opposite to the drawer frame. The display screen is provided with a vacuum button, which is electrically connected to the electromagnet.

[0018] In one possible implementation, the drawer frame has an air extraction hole on the side away from the drawer drawer, the food preservation drawer includes a vacuum pump, the air inlet of the vacuum pump is connected to the air extraction hole, and the air extraction button is electrically connected to the vacuum pump.

[0019] In one possible implementation, a pressure detection device is provided on the drawer frame, and the pressure detection device is electrically connected to the display screen.

[0020] Secondly, this application provides a refrigerator, including the aforementioned food preservation drawer.

[0021] The technical solutions provided in this application have the following advantages compared with the prior art:

[0022] The preservation drawer and refrigerator provided in this application embodiment allow the user to push the drawer drawer backward relative to the drawer frame until the drawer drawer and drawer frame are relatively closed. At this time, air can be drawn from the internal space of the drawer frame, creating a low-oxygen, low-pressure state inside the drawer frame. This achieves oxygen control and preservation of the food stored inside the drawer. When the drawer drawer and drawer frame are relatively closed, the electromagnet is energized. The energized electromagnet generates magnetism, creating a magnetic attraction between the electromagnet and the metal decorative strip. This magnetic attraction ensures a tight fit between the drawer drawer drawer and drawer frame, improving the seal between them and preventing external air from entering the internal space of the drawer frame through the gaps, thus ensuring the preservation of the food. When it is necessary to remove the food, the electromagnet is de-energized, the magnetic attraction between the electromagnet and the metal decorative strip disappears, and external air can enter the internal space of the drawer frame through the gaps between the drawer drawer drawer and drawer frame. The sealing ring gradually returns to its original state, the air pressure inside and outside the drawer frame is balanced, and the user can easily pull open the drawer drawer to remove the food stored inside. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0026] Figure 1 This is a schematic diagram of the structure of a food storage drawer provided in an embodiment of this application;

[0027] Figure 2 for Figure 1 The diagram shown is an exploded view of the structure of the food storage drawer.

[0028] Figure 3 for Figure 1 The diagram shows a partial structural schematic of the drawer frame, where the second cover plate is not shown.

[0029] Figure 4 for Figure 1 The diagram shown is a structural schematic of the drawer.

[0030] Figure 5 for Figure 1 Cross-section of the food storage drawer shown Figure 1 In this configuration, the drawer drawer and drawer frame are in a relatively closed state, and the pressure relief valve is in the second state.

[0031] Figure 6 for Figure 5 An exploded view of the pressure relief valve in the food storage drawer;

[0032] Figure 7 for Figure 5 The enlarged schematic diagram at point A is shown below;

[0033] Figure 8 for Figure 1 Cross-section of the food storage drawer shown Figure 2 The drawer and drawer frame are in a relatively closed state, and the pressure relief valve is in the first state.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Drawer frame; 11. Guide rail; 12. Second annular groove; 13. Second cover plate; 14. Second groove; 15. Pressure detection device; 16. Air extraction hole;

[0036] 2. Drawer compartment; 21. Cover; 211. Front cover; 2111. First groove; 2112. Second through hole; 2113. Support cylinder; 212. Rear cover; 2121. First annular groove; 213. First receiving cavity; 214. Decorative panel; 215. First cover plate; 22. Drawer body; 221. First through hole; 222. Protruding rib; 23. Sealing ring;

[0037] 3. Electromagnetic sealing assembly; 31. Metal decorative strip; 32. Electromagnet;

[0038] 4. Pressure relief valve; 41. First sleeve; 42. Valve core; 43. Top cover; 44. Spring. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0041] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0042] In related technologies, it's impossible to ensure the airtightness of a food storage drawer simply by relying on a sealing ring tightly against the drawer frame. Some food storage drawers use torsion springs to press the sealing ring against the drawer frame, and the vent holes are also sealed by the pressure relief valve through the compression force of the torsion spring. However, the torsion spring accumulates fatigue damage with repeated use. Under repeated loads, tiny cracks will initiate inside the torsion spring and gradually expand, eventually leading to its failure. Therefore, the sealing effect of this mechanical sealing structure decreases with repeated use, resulting in increasingly poor drawer frame sealing and affecting the preservation of food.

[0043] To address the technical problem that the sealing effect of existing mechanical sealing structures decreases with repeated use, leading to increasingly poor sealing of the drawer frame and affecting the preservation of food, this application provides a food preservation drawer and refrigerator that utilizes the magnetic attraction generated between an electromagnet and a metal decorative strip to improve the sealing between the drawer drawer and the drawer frame, preventing external air from entering the internal space of the drawer frame through the gap between the drawer drawer and the drawer frame, thereby ensuring the preservation of food.

[0044] Figures 1 to 2 The present application provides a food storage drawer, including a drawer frame 1, a drawer compartment 2, and an electromagnetic sealing assembly 3. The drawer compartment 2 is movably mounted on the drawer frame 1. The electromagnetic sealing assembly 3 includes a metal decorative strip 31 and an electromagnet 32. The metal decorative strip 31 is located on the side of the drawer frame 1 facing the drawer compartment 2, and the electromagnet 32 ​​is located at the end of the drawer compartment 2 near the drawer frame 1. When the drawer compartment 2 and the drawer frame 1 are closed relative to each other, the electromagnet 32 ​​is energized and generates a magnetic attraction force with the metal decorative strip 31, so that the drawer compartment 2 and the drawer frame 1 are tightly fitted under the action of the magnetic attraction force.

[0045] For ease of explanation and understanding, the movement direction of drawer 2 can be the X direction shown in the diagram, with the two sides of the X direction being front and back, respectively. Correspondingly, the side of drawer 2 facing the user is the front side, and the side of drawer 2 away from the user is the back side. The front end of drawer frame 1 has an opening, and drawer 2 is fitted into the opening of drawer frame 1. It can be understood that when the user pushes drawer 2, it moves backward relative to drawer frame 1 until drawer 2 and drawer frame 1 are relatively closed. At this point, air can be drawn from the interior space of drawer frame 1, creating a low-oxygen, low-pressure environment inside the drawer frame 1. This helps to control oxygen levels and preserve the freshness of food stored inside the drawer. With drawer 2 and drawer frame 1 relatively closed, electromagnet 32 ​​is energized. The energized electromagnet 32 ​​generates magnetism, creating a magnetic attraction between it and the metal decorative strip 31. This magnetic attraction ensures a tight fit between drawer 2 and drawer frame 1, improving the seal and preventing external air from entering the interior of drawer frame 1 through gaps, thus guaranteeing food preservation. In this case, the opening in drawer frame 1 serves as a pressure relief vent, eliminating the need for a separate pressure relief hole and avoiding reliability issues caused by inadequate sealing. Compared to existing technologies, the preservation drawer structure provided in this embodiment is simpler and more reliable in its sealing, with a longer service life than mechanical sealing structures.

[0046] An electromagnet 32 ​​is a device that generates electromagnetism when energized. A conductive winding, matching its power rating, is wound around the outside of an iron core. This current-carrying coil exhibits magnetism like a magnet. Electromagnets 32 are typically made in a bar or horseshoe shape to make the iron core easier to magnetize. Figure 2 As shown, the electromagnet 32 ​​in this application is strip-shaped. Furthermore, to ensure the electromagnet 32 ​​demagnetizes immediately upon de-energization, it is often made of soft iron or silicon steel, which demagnetizes quickly. Such an electromagnet 32 ​​is magnetic when energized, and its magnetism disappears when the power is off. When food needs to be retrieved, the electromagnet 32 ​​is de-energized, the magnetic attraction between the electromagnet 32 ​​and the metal decorative strip 31 disappears, and external air can enter the interior space of the drawer frame 1 through the gap between the drawer drawer 2 and the drawer frame 1, thus balancing the air pressure inside and outside the drawer frame 1. The user can then easily pull open the drawer drawer 2 and retrieve the food stored inside. Of course, even when the electromagnet 32 ​​is de-energized and the magnetic attraction between the electromagnet 32 ​​and the metal decorative strip 31 disappears, the user can also directly pull the drawer drawer 2, causing it to move forward relative to the drawer frame 1, thereby directly opening the drawer and retrieving the food stored inside.

[0047] Optionally, the metal decorative strip 31 is provided on the side of the drawer frame 1 facing the drawer drawer 2, that is, the metal decorative strip 31 is provided at the front end of the drawer frame 1. The metal decorative strip 31 is provided around the periphery of the drawer frame 1, which can fix the drawer frame 1 and prevent the sharp edges of the drawer frame 1 from injuring people or damaging the refrigerator liner.

[0048] From a materials and manufacturing process perspective, the metal decorative strip 31 can be made from advanced ABS material through extrusion molding. This material possesses numerous excellent properties, perfectly meeting the molding and performance requirements of the decorative strip. Furthermore, an electroplating layer, made of ferromagnetic material, is applied to the surface of the metal decorative strip 31. On one hand, the metal decorative strip 31 exhibits a high-metallic texture, visually conveying a refined and upscale feel. This provides an excellent decorative effect on the appearance of the refrigerator drawer and even the entire refrigerator, enhancing the overall aesthetics and quality of the product, making it more competitive and attractive among similar products in the market. On the other hand, because the electroplating layer uses ferromagnetic material, it generates magnetic attraction when interacting with an energized electromagnet 32. This magnetic attraction plays a positive role in the cooperation between the drawer drawer 2 and the drawer frame 1, effectively bringing the drawer drawer 2 and drawer frame 1 closer together, filling any small gaps that may exist, thereby significantly improving the sealing performance between the drawer drawer 2 and drawer frame 1. This is of great importance in preventing cold air leakage from inside the refrigerator and preventing warm air from entering the refrigerator. It helps maintain a good refrigeration or freezing environment inside the refrigerator, ensures that the refrigerator can operate efficiently and stably, extends the life of the refrigerator, and also better protects the freshness and quality of various items stored in the refrigerator.

[0049] Of course, besides using ABS material for extrusion molding and electroplating, the metal decorative strip 31 can also be made directly from sheet metal parts with ferromagnetic materials. Sheet metal parts themselves have a certain strength and toughness, providing reliable protection and fixation for the drawer frame 1. Directly using ferromagnetic sheet metal parts to make the metal decorative strip 31 ensures that it can generate magnetic attraction with the energized electromagnet 32 ​​to improve the sealing of the drawer drawer 2 and drawer frame 1, while also simplifying the manufacturing process, reducing production costs, and improving production efficiency. This method is highly feasible and economical in large-scale production, providing enterprises with more diversified options in the product manufacturing process. It allows enterprises to comprehensively consider their own production conditions, market demand, cost control, and other factors to choose the most suitable manufacturing method for the metal decorative strip 31, achieving the best balance between product performance, appearance, and cost.

[0050] Furthermore, to improve the sealing performance between the drawer drawer 2 and the drawer frame 1, multiple electromagnets 32 can be provided. For example, two electromagnets 32 can be provided, spaced apart, and each electromagnet 32 ​​can generate a magnetic attraction with the metal decorative strip 31, so that the drawer drawer 2 can be tightly fitted with the drawer frame 1 on all sides under the action of the magnetic attraction; or, four electromagnets 32 can be provided (e.g., Figure 2 As shown, four electromagnets 32 form a rectangular electromagnetic frame. Each electromagnet 32 ​​can generate a magnetic attraction with the metal decorative strip 31, so that the drawer drawer 2 can be tightly fitted with the drawer frame 1 under the action of the magnetic attraction, thereby improving the sealing performance between the drawer drawer 2 and the drawer frame 1. Of course, the number of electromagnets 32 can also be set to other numbers, and this application does not make specific limitations here.

[0051] Optionally, such as Figure 3 and Figure 4 As shown, the inner wall of the drawer frame 1 is provided with a guide rail 11, the length direction of the guide rail 11 is parallel to the moving direction of the drawer 2, and the outer wall of the drawer 2 is provided with a rib 222 that is slidably connected to the guide rail 11. With the sliding cooperation between the guide rail 11 and the rib 222, the drawer 2 can move back and forth relative to the drawer frame 1 along the guide rail 11.

[0052] In one embodiment, such as Figure 4 and Figure 5 As shown, the drawer 2 includes a faceplate 21, a drawer body 22, and a sealing ring 23. The faceplate 21 includes a first receiving cavity 213, and an electromagnet 32 ​​is disposed in the first receiving cavity 213 of the faceplate 21. The drawer body 22 is disposed on the side of the faceplate 21 facing the drawer frame 1. The sealing ring 23 is disposed on the side of the faceplate 21 facing the drawer frame 1 and is disposed around the periphery of the drawer body 22.

[0053] Understandably, the electromagnet 32 ​​is housed within the first receiving cavity 213 of the face shield 21, concealing it within the face shield 21 and improving its aesthetics. The container 22 is used to store food. Optionally, the outer wall of the container 22 is provided with protruding ribs 222 that slide along the guide rail 11. With the sliding cooperation between the guide rail 11 and the protruding ribs 222, when the user pulls the face shield 21, the container 22 can move back and forth relative to the drawer frame 1 along the guide rail 11. With drawer 2 and drawer frame 1 relatively closed, the electromagnet 32 ​​is energized. The electromagnet 32 ​​generates magnetism, creating a magnetic attraction between itself and the metal decorative strip 31. This magnetic attraction ensures a tight fit between drawer 2 and drawer frame 1. The sealing ring 23 deforms under the pressure between drawer 2 and drawer frame 1, preventing external air from entering the interior of drawer frame 1 through the gap between them. This improves the seal between drawer 2 and drawer frame 1, thus ensuring the freshness of the food. When food needs to be removed, the electromagnet 32 ​​is de-energized, the magnetic attraction between it and the metal decorative strip 31 disappears, and external air can enter the interior of drawer frame 1 through the gap. The sealing ring 23 gradually returns to its original shape, and the air pressure inside and outside drawer frame 1 is balanced. The user can then easily pull open drawer 2 and remove the stored food.

[0054] In addition, the sealing ring 23 is made of a rubber material with good elastic recovery, such as ethylene propylene diene monomer (EPDM). This rubber has excellent aging resistance, ozone resistance, and chemical resistance, and its Shore hardness can be between 40HA and 60HA. It ensures sufficient softness to meet sealing requirements while maintaining a certain structural strength. The cross-sectional shape of the sealing ring 23 can be designed as circular or rectangular. The diameter of the circular cross-section sealing ring 23 is between 3mm and 5mm, and the thickness of the rectangular cross-section sealing ring 23 is between 3mm and 5mm, and the width is between 6mm and 10mm. Furthermore, reinforcing fibers, such as glass fiber, can be added inside the sealing ring 23 to improve its tensile strength and prevent deformation due to stretching during long-term use.

[0055] In one embodiment, such as Figure 2As shown, the face mask 21 includes a front cover 211 and a rear cover 212. The front cover 211 is fitted around the periphery of the rear cover 212. An electromagnet 32 ​​is disposed on the side of the front cover 211 facing the rear cover 212. A first cover plate 215 for fixing the electromagnet 32 ​​is provided on the front cover 211. Specifically, the front cover 211 is fitted around the periphery of the rear cover 212, with a buckle on the outer side wall of the rear cover 212 and a slot on the inner side wall of the front cover 211. The buckle and the slot are engaged, thereby achieving a detachable connection between the front cover 211 and the rear cover 212. When it is necessary to inspect the electrical safety of the electromagnet 32 ​​inside the face mask 21, the rear cover 212 can be easily removed. The electromagnet 32 ​​is located on the side of the front cover 211 facing the rear cover 212. The front cover 211 is provided with a first cover plate 215 for fixing the electromagnet 32. The first cover plate 215 fixes the electromagnet to the side of the front cover 211 facing the rear cover 212, preventing the electromagnet from becoming loose due to the back-and-forth movement of the drawer 2 or other external forces. This ensures that the electromagnet can generate a stable magnetic attraction force with the metal decorative strip 31 after being energized, thereby ensuring the sealing performance between the drawer 2 and the drawer frame 1.

[0056] Optionally, the bottom of the front cover 211 is provided with a first groove 2111, which has a certain depth and is just large enough to accommodate a user's fingers. When the user needs to open or close the drawer, they can place their fingers into the first groove 2111. Since the fingers can fully contact the inner wall of the groove and generate a certain friction, the user can easily pull the drawer 2, thus smoothly completing the opening or closing action of the drawer. This design greatly improves the convenience and user-friendliness of the drawer.

[0057] Furthermore, such as Figure 2 As shown, the cover 21 also includes a decorative panel 214, which is placed around the front cover 211 to enhance the overall aesthetics of the drawer 2.

[0058] In one embodiment, such as Figure 2 As shown, the rear cover 212 has a first annular groove 2121 on the side facing the drawer frame 1, and a sealing ring 23 is disposed on the first annular groove 2121. The first annular groove 2121 is an annular groove, and the orthographic projection of the sealing ring 23 on the vertical plane covers the orthographic projection of the metal decorative strip 31 on the vertical plane.

[0059] It is understandable that the orthographic projection of the sealing ring 23 on the vertical plane overlaps the orthographic projection of the metal decorative strip 31 on the vertical plane. That is, when the drawer 2 and the drawer frame 1 are relatively closed, the electromagnet 32 ​​is energized. The electromagnet 32 ​​generates magnetism, and a magnetic attraction force can be generated between the electromagnet 32 ​​and the metal decorative strip 31. The sealing ring 23 is deformed under the pressing force between the drawer 2 and the drawer frame 1. At this time, the sealing ring 23 is tightly attached to the metal decorative strip 31, so that the drawer 2 and the drawer frame 1 are tightly fitted under the action of magnetic attraction. This can prevent external air from entering the internal space of the drawer frame 1 from the gap between the drawer 2 and the drawer frame 1, thereby improving the sealing performance between the drawer 2 and the drawer frame 1, and thus ensuring the preservation effect of food. Since the sealing ring 23 is made of rubber, it may wear down naturally after long-term use, which will cause the seal between the drawer drawer 2 and the drawer frame 1 to deteriorate. The sealing ring 23 is embedded in the first ring groove 2121. The user can replace the sealing ring 23 according to the actual situation. The replacement process is relatively convenient and can be done without the use of other tools.

[0060] Additionally, a suitable amount of sealant can be applied to the first annular groove 2121. Food-grade silicone sealant is recommended, as it exhibits good flexibility and temperature resistance after curing. When applying the sealant, ensure the layer is uniform, with a thickness of 1mm-2mm. Pay attention to the curing conditions; generally, it requires 24-48 hours of curing at room temperature to achieve the best sealing effect.

[0061] In practical applications of food storage drawers, even when the electromagnet 32 ​​is de-energized and the magnetic attraction between the electromagnet 32 ​​and the metal decorative strip 31 disappears, the user cannot easily pull the drawer drawer 2 due to the large pressure difference between the inside and outside of the drawer frame 1. This is especially true for children with less strength, as the drawer drawer drawer 2 cannot be separated from the drawer frame 1 to retrieve the food stored inside. To avoid this situation, this application also includes a pressure relief valve 4 to quickly release pressure from the drawer frame 1, making it easier for the user to open the drawer. The specific structural design is described below.

[0062] In one embodiment, such as Figure 5 and Figure 6 As shown, a first accommodating cavity 213 is provided between the front cover 211 and the rear cover 212. The bucket body 22 is provided with a first through hole 221 communicating with the first accommodating cavity 213. The front cover 211 is provided with a second through hole 2112 communicating with the first accommodating cavity 213. A pressure relief valve 4 is provided on the second through hole 2112. The pressure relief valve 4 has a first state of opening the second through hole 2112 and a second state of closing the second through hole 2112.

[0063] Understandably, when the pressure relief valve 4 is in the first state, the second through hole 2112 is open, and the first accommodating cavity 213 is connected to the external space of the drawer 2. External air can quickly enter the first accommodating cavity 213 through the second through hole 2112, and then flow into the internal space of the drawer frame 1 through the first through hole 221, causing the internal and external pressures of the drawer frame 1 to quickly reach a balanced state, achieving rapid pressure relief of the drawer frame 1. In this situation, the user only needs to apply a small amount of force to easily pull the drawer 2, smoothly open the drawer, and conveniently take out the food stored inside the drawer. When the pressure relief valve 4 is in the second state, the second through hole 2112 is closed, and the internal space of the drawer frame 1 forms a relatively closed low-oxygen, low-pressure space, which is conducive to food preservation.

[0064] In one embodiment, such as Figure 6 and Figure 7 As shown, the pressure relief valve 4 includes a first sleeve 41, a valve core 42, and a top cover 43. One end of the valve core 42 passes through the first sleeve 41 and is connected to the top cover 43. A spring 44 is sleeved around the valve core 42. The first end of the spring 44 is connected to the valve core 42, and the second end of the spring 44 is connected to the top cover 43. A support cylinder 2113 is provided at the first through hole 221 of the front cover 211. The first end of the support cylinder 2113 is connected to the front cover 211, and the second end of the support cylinder 2113 extends into the first accommodating cavity 213. The first sleeve 41 is disposed on the support cylinder 2113, and the top cover 43 is closed on the second end of the support cylinder 2113.

[0065] It should be noted that the axis of the support cylinder 2113 can be set vertically, which can be the Z-direction shown in the figure. The outer wall of the first sleeve 41 is fixedly connected to the inner wall of the support cylinder 2113. The support cylinder 2113 plays a good role in fixing and supporting the pressure relief valve 4. The support cylinder 2113 is provided with a pressure relief channel communicating with the first accommodating cavity 213. The first end of the pressure relief channel is connected to the second through hole 2112, and the second end of the pressure relief channel is connected to the first accommodating cavity 213. During the food preservation process, the internal space of the drawer frame 1 is maintained in a low-oxygen and low-pressure state. Under the elastic force of the spring 44, the top cover 43 closes to the second end of the support cylinder 2113, the pressure relief channel of the support cylinder 2113 is closed, the second through hole 2112 is closed, and the pressure relief valve 4 is in the second state, such as... Figure 5 As shown. When pressure relief is needed, the user presses the end of the valve core 42 away from the top cover 43, causing the valve core 42 to slide upward relative to the first sleeve 41. The valve core 42 drives the top cover 43 to slide upward, thereby opening the pressure relief channel of the support cylinder 2113, and the second through hole 2112 opens, as shown. Figure 8As shown, external air can quickly enter the first accommodating cavity 213 through the second through hole 2112 via the pressure relief channel, and then flow into the internal space of the drawer frame 1 through the first through hole 221, so that the internal and external pressure of the drawer frame 1 can quickly reach a balanced state, realizing rapid pressure relief of the drawer frame 1. The user can easily pull the drawer 2, open the drawer, and take out the food stored inside the drawer.

[0066] The first through hole 221 can be configured as a circle, square, trapezoid, or other shapes, and the number of first through holes 221 can also be multiple. Setting multiple first through holes 221 is beneficial for faster pressure relief, and this application does not impose specific limitations here. The shape of the second through hole 2112 can also be configured as a circle, square, trapezoid, or other shapes, and this application does not impose specific limitations here.

[0067] In one embodiment, such as Figure 3 As shown, a second annular groove 12 is provided on the side of the drawer frame 1 facing the drawer drawer 2, and a metal decorative strip 31 is provided on the second annular groove 12. Specifically, the second annular groove 12 is an annular groove, which surrounds the opening of the drawer frame 1. The metal decorative strip 31 is provided on the second annular groove 12, so that the metal decorative strip 31 surrounds the periphery of the drawer frame 1. The metal decorative strip 31 plays a role in fixing the drawer frame 1 and can also prevent the sharp edges of the opening of the drawer frame 1 from injuring people or damaging the inner liner of the refrigerator.

[0068] In conjunction with the foregoing embodiments, such as Figure 2 As shown, the rear cover 212 has a first annular groove 2121 on the side facing the drawer frame 1, and a sealing ring 23 is disposed on the first annular groove 2121. The drawer frame 1 has a second annular groove 12 on the side facing the cover 21, and a metal decorative strip 31 is disposed on the second annular groove 12. Both the first annular groove 2121 and the second annular groove 12 are annular grooves, which allows the sealing ring 23 to fit completely with the metal decorative strip 31. The tight fit between the sealing ring 23 and the metal decorative strip 31 effectively prevents the sealing ring 23 from bulging due to uneven local stress or improper installation. Once the sealing ring 23 bulges, external air can easily seep in through the opening of the drawer frame 1. Therefore, through the tight fit between the first annular groove 2121 and the sealing ring 23, and the tight fit between the second annular groove 12 and the metal decorative strip 31, this risk of air leakage is completely eliminated, keeping the food storage drawer in a low-oxygen, low-pressure state, which can further improve the sealing performance of the food storage drawer.

[0069] In one embodiment, such as Figure 1 As shown, a second cover plate 13 is provided on the drawer frame 1. A display screen is provided on the side of the second cover plate 13 away from the drawer frame 1. A vacuum button is provided on the display screen and is electrically connected to the electromagnet 32.

[0070] Specifically, a second groove 14 is provided on the drawer frame 1, and a second cover plate 13 is provided on the second groove 14. One side of the second cover plate 13 extends along the X direction and has a protruding part relative to the drawer frame 1. The orthographic projection of the protruding part of the second cover plate 13 on the horizontal plane covers the orthographic projection of the cover 21 on the horizontal plane, thereby improving the overall aesthetics of the drawer and concealing the wiring. An operation panel and a display screen are provided on the side of the second cover plate 13 away from the drawer frame 1. The display screen has a vacuum button, which is electrically connected to the electromagnet 32. When the user stores food, the food is placed in the drawer drawer 2, and the user pushes the drawer drawer 2, causing the drawer drawer 2 to move backward relative to the drawer frame 1 until the drawer drawer 2 and the drawer frame 1 are relatively closed. After closing the drawer, manually press the air extraction button. At this time, the electromagnet 32 ​​is energized and generates magnetism. The electromagnet 32 ​​and the metal decorative strip 31 can generate magnetic attraction. Under the action of magnetic attraction, the drawer drawer 2 and the drawer frame 1 are tightly fitted together, thereby improving the sealing between the drawer drawer 2 and the drawer frame 1 and preventing external air from entering the internal space of the drawer frame 1 through the gap between the drawer drawer 2 and the drawer frame 1, thus ensuring the freshness of the food.

[0071] In one embodiment, such as Figure 1 As shown, an exhaust vent 16 is provided on the side of the drawer frame 1 away from the drawer drawer 2. The fresh-keeping drawer includes a vacuum pump, the air inlet of which is connected to the exhaust vent 16, and the exhaust button is electrically connected to the vacuum pump. When the user pushes the drawer drawer 2, it moves backward relative to the drawer frame 1 until the drawer drawer 2 and the drawer frame 1 are relatively closed. At this time, the user manually presses the exhaust button, and the vacuum pump evacuates air from the interior space of the drawer frame 1 through the exhaust vent 16, creating a low-oxygen, low-pressure environment inside the drawer frame 1. This effectively controls oxygen levels and preserves the food stored inside the drawer. While the vacuum pump is evacuating air, the electromagnet 32 ​​is energized and generates magnetism. The electromagnet 32 ​​and the metal decorative strip 31 generate a magnetic attraction, causing the drawer drawer 2 and the drawer frame 1 to fit tightly together under the magnetic attraction, preventing external air from entering the interior space of the drawer frame 1 through the gap between the drawer drawer 2 and the drawer frame 1, thus ensuring the preservation of the food.

[0072] It should be noted that the aforementioned vacuum button can employ a pressure sensor or a touch sensor. The pressure sensor detects pressure signals and converts them into electrical signals. In some embodiments, the pressure sensor can be located on the display screen. There are many types of pressure sensors, such as resistive pressure sensors, inductive pressure sensors, and capacitive pressure sensors. A capacitive pressure sensor may consist of at least two parallel plates with conductive material. When a force is applied to the pressure sensor, the capacitance between the electrodes changes. The pressure sensor determines the pressure intensity based on the change in capacitance. When a touch operation is applied to the vacuum button, the pressure sensor detects the intensity of the touch operation and sends a control signal to the electromagnet 32 ​​or the vacuum pump.

[0073] A touch sensor, also known as a "touch device," can be located on a display screen. The touch sensor and the display screen together form a touchscreen, also called a "touchscreen." The touch sensor detects touch operations applied to or near it. It then transmits the detected touch operation to the application processor to determine the type of touch event. Visual output related to the touch operation can be provided through the display screen. In some embodiments, the touch sensor may also be located on the surface of the control panel, in a different position than the display screen. When a touch operation is applied to the vacuum button, the intensity of the touch operation is detected by a pressure sensor, and a control signal is sent to the electromagnet 32 ​​or the vacuum pump.

[0074] In one embodiment, such as Figure 1 As shown, a pressure detection device 15 is installed on the drawer frame 1, and the pressure detection device 15 is electrically connected to the display screen. The pressure detection device 15 can be a pressure sensor available in the prior art. There are many types of pressure sensors, such as resistive pressure sensors, inductive pressure sensors, and capacitive pressure sensors. The pressure detection device 15 is used to detect the pressure inside the drawer frame 1. Generally, when the air pressure inside the drawer frame 1 reaches 0.8 MPa, the vacuum pump will stop working. At this time, the internal space of the drawer frame 1 is in a low-oxygen, low-pressure state, which is beneficial for the preservation of food.

[0075] In addition, the working air pressure of the drawer frame 1 for low oxygen preservation is 0.8MPa, the external air pressure of the drawer frame 1 is 1.1MPa, and the pressure difference between the inside and outside of the drawer is only 0.3MPa. When it is necessary to take out the items stored in the drawer frame 1, the control electromagnet 32 ​​is in the de-energized state, the magnetic attraction between the electromagnet 32 ​​and the metal decorative strip 31 disappears, and the user can pull the drawer drawer 2 more easily, so that the drawer drawer 2 is separated from the drawer frame 1, thereby taking out the food stored inside the drawer.

[0076] It should be noted that this preservation drawer can be used in refrigerators as well as in cabinets in other fields, such as medicine cabinets and jewelry cabinets. Specifically, in one example, the preservation drawer is used in a medicine cabinet. Some medicines or reagents are prone to reacting with oxygen, carbon dioxide, or other gases diffused in the air. Therefore, it is necessary to strictly control the oxygen concentration in the air. The user puts the medicine or reagent into drawer 2, pushes drawer 2, and moves drawer 2 backward relative to drawer frame 1 until drawer 2 and drawer frame 1 are relatively closed. At this time, the internal space of drawer frame 1 can be evacuated, creating a low-oxygen, low-pressure state inside drawer frame 1. In this way, the medicine or reagent stored inside the drawer can be kept fresh with oxygen control. With the drawer 2 and drawer frame 1 closed relative to each other, the electromagnet 32 ​​is energized. The electromagnet 32 ​​generates magnetism, and a magnetic attraction force is generated between the electromagnet 32 ​​and the metal decorative strip 31. This magnetic attraction force allows the drawer 2 and drawer frame 1 to fit tightly together, thereby improving the sealing between the drawer 2 and drawer frame 1. This prevents external air from entering the internal space of the drawer frame 1 through the gap between the drawer 2 and drawer frame 1, which is beneficial for the preservation of medicines or reagent kits.

[0077] In another example, a refrigerated drawer is applied to a jewelry cabinet. Some jewelry items are prone to reacting with oxygen in the air and turning black, so it is necessary to strictly control the oxygen concentration in the air. The user places the jewelry into drawer 2 and pushes it, causing it to move backward relative to drawer frame 1 until they are relatively closed. At this point, air can be drawn from the interior of drawer frame 1, creating a low-oxygen, low-pressure environment. This effectively controls oxygen levels and preserves the jewelry stored inside. With drawer 2 and drawer frame 1 closed, electromagnet 32 ​​is energized. The electromagnet 32 ​​generates magnetism, creating a magnetic attraction between it and the metal decorative strip 31. This magnetic attraction ensures a tight seal between drawer 2 and drawer frame 1, improving the airtightness and preventing external air from entering the interior of drawer frame 1 through gaps, thus facilitating the preservation of the jewelry.

[0078] This application also provides a refrigerator, including a cabinet and a fresh-keeping drawer as described above. The cabinet has a fresh-keeping compartment, and the fresh-keeping drawer is disposed in the fresh-keeping compartment.

[0079] Understandably, when the user pushes drawer 2, it moves backward relative to drawer frame 1 until they are relatively closed. At this point, air can be drawn from the interior of drawer frame 1, creating a low-oxygen, low-pressure environment. This helps control oxygen levels and preserve the food stored inside. With drawer 2 and drawer frame 1 closed, electromagnet 32 ​​is energized. The electromagnet generates magnetism, creating a magnetic attraction between it and the metal decorative strip 31. This magnetic attraction ensures a tight seal between drawer 2 and drawer frame 1, improving the airtightness and preventing external air from entering the interior of drawer frame 1 through gaps, thus ensuring food preservation. In this situation, the opening in drawer frame 1 serves as a pressure relief vent, eliminating the need for a separate pressure relief hole and avoiding reliability issues caused by inadequate sealing of pressure relief holes. Compared to existing technologies, the food storage drawer provided in this application has a simpler structure and more reliable sealing, and its service life is also longer than that of mechanical sealing structures. When food needs to be removed, the electromagnet 32 ​​is de-energized, the magnetic attraction between the electromagnet 32 ​​and the metal decorative strip 31 disappears, and external air can enter the internal space of the drawer frame 1 through the gap between the drawer drawer 2 and the drawer frame 1, thereby balancing the air pressure inside and outside the drawer frame 1. The user can easily pull open the drawer drawer 2 and take out the food stored inside. Of course, when the electromagnet 32 ​​is de-energized and the magnetic attraction between the electromagnet 32 ​​and the metal decorative strip 31 disappears, the user can also directly pull the drawer drawer 2, which moves forward relative to the drawer frame 1, thereby directly opening the drawer and taking out the food stored inside.

[0080] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0081] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0082] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A food storage drawer, characterized in that, include: Drawer frame; A drawer drawer is movably mounted on the drawer frame; An electromagnetic sealing assembly includes a metal decorative strip and an electromagnet, wherein the metal decorative strip is disposed on the side of the drawer frame facing the drawer drawer, and the electromagnet is disposed on the end of the drawer drawer close to the drawer frame; When the drawer and the drawer frame are closed relative to each other, the electromagnet generates a magnetic attraction force with the metal decorative strip after being energized, so that the drawer and the drawer frame fit tightly together under the action of the magnetic attraction force.

2. The food preservation drawer according to claim 1, characterized in that, The drawer includes a faceplate, a drawer body, and a sealing ring. The faceplate includes a first receiving cavity, and the electromagnet is disposed in the first receiving cavity. The drawer body is disposed on the side of the faceplate facing the drawer frame. The sealing ring is disposed on the side of the faceplate facing the drawer frame and surrounds the periphery of the drawer body.

3. The food preservation drawer according to claim 2, characterized in that, The mask includes a front cover and a rear cover. The front cover is fitted around the periphery of the rear cover. The electromagnet is disposed on the side of the front cover facing the rear cover. The front cover is provided with a first cover plate for fixing the electromagnet.

4. The food preservation drawer according to claim 3, characterized in that, The rear cover has a first annular groove on the side facing the drawer frame, and the sealing ring is disposed on the first annular groove. The orthographic projection of the sealing ring on the vertical plane covers the orthographic projection of the metal decorative strip on the vertical plane.

5. The food preservation drawer according to claim 3, characterized in that, The first accommodating cavity is provided between the front cover and the rear cover. The bucket body is provided with a first through hole communicating with the first accommodating cavity. The front cover is provided with a second through hole communicating with the first accommodating cavity. A pressure relief valve is provided on the second through hole. The pressure relief valve has a first state of opening the second through hole and a second state of closing the second through hole.

6. The food preservation drawer according to claim 5, characterized in that, The pressure relief valve includes a first sleeve, a valve core, and a top cover. One end of the valve core passes through the first sleeve and is connected to the top cover. A spring is sleeved around the valve core. The first end of the spring is connected to the valve core, and the second end of the spring is connected to the top cover. The front cover has a support cylinder at the first through hole. The first end of the support cylinder is connected to the front cover, and the second end of the support cylinder extends into the first accommodating cavity. The first sleeve is disposed on the support cylinder, and the top cover is closed on the second end of the support cylinder.

7. The food preservation drawer according to claim 1, characterized in that, The drawer frame has a second annular groove on the side facing the drawer drawer, and the metal decorative strip is disposed on the second annular groove.

8. The food preservation drawer according to claim 1, characterized in that, A second cover plate is provided on the drawer frame. An operation panel and a display screen are provided on the side of the second cover plate away from the drawer frame. An air extraction button is provided on the display screen and is electrically connected to the electromagnet.

9. The food preservation drawer according to claim 8, characterized in that, The drawer frame has an air extraction hole on the side away from the drawer drawer. The food preservation drawer includes a vacuum pump. The air inlet of the vacuum pump is connected to the air extraction hole. The air extraction button is electrically connected to the vacuum pump.

10. The food preservation drawer according to claim 8, characterized in that, A pressure detection device is installed on the drawer frame, and the pressure detection device is electrically connected to the display screen.

11. A refrigerator, characterized in that, Includes the food storage drawer as described in any one of claims 1 to 10.

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