Drawer assembly and refrigerator

Abstract

The invention discloses a drawer assembly and a refrigerator, and relates to the technical field of refrigerators.The drawer assembly comprises a shell, a cover plate, a drawer body and a light preservation assembly, the shell is provided with a containing cavity and an opening communicating with the containing cavity, the cover plate is arranged in the containing cavity and can move in the vertical direction, and the drawer body can be pushed into or pulled out of the containing cavity along the opening; when the drawer body is pushed into the containing cavity, the cover plate abuts against the upper edge of the drawer body. The light fresh-keeping assembly is arranged on the shell or the cover plate and comprises a plurality of light sources capable of emitting light with different wavelengths, the light emitted by the light sources can irradiate the drawer body, so that fruits and vegetables in the drawer body can perform photosynthesis, on one hand, the humidity in the containing cavity can be improved to reduce loss of nutrient substances, and on the other hand, the humidity in the containing cavity can be improved to reduce loss of the nutrient substances. Fruit and vegetables in the drawer body can be synthesized into nutrient substances through photosynthesis, so that the content of the nutrient substances is increased, and the preservation period of the fruit and vegetables can be prolonged.

Description

Technical Field

[0001] This invention relates to the field of refrigerator technology, and in particular to a drawer assembly and a refrigerator. Background Technology

[0002] With the fast pace of life and changes in consumption habits, many consumers have gradually developed the habit of buying large quantities of food at the supermarket at once. In order to extend the shelf life of food, they usually put it in the refrigerator, with fresh fruits and vegetables being the most common items stored there.

[0003] Fresh fruits and vegetables remain living organisms for a considerable period after harvesting. While the low temperature of a refrigerator can inhibit respiration and slow down metabolism to some extent, fruits and vegetables still require light and high humidity to minimize nutrient loss. Existing drawer systems do not provide these conditions, hindering nutrient accumulation and leading to excessive nutrient loss, thus shortening the shelf life of fruits and vegetables. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a drawer assembly that can reduce the loss of nutrients in fruits and vegetables, thereby extending their shelf life.

[0005] The present invention also proposes a refrigerator having the above-described drawer assembly.

[0006] A drawer assembly according to a first aspect of the present invention includes:

[0007] The housing has a receiving cavity and an opening communicating with the receiving cavity;

[0008] A cover plate is disposed within the receiving cavity and is movable in the vertical direction;

[0009] The drawer body is capable of being pushed into the receiving cavity along the opening, and when the drawer body is pushed into or pulled out of the receiving cavity, the cover plate abuts against the upper edge of the drawer body;

[0010] A light-preservation component is disposed in the housing or the cover plate. The light-preservation component includes multiple light sources that can emit light of different wavelengths, and the light emitted by the multiple light sources can illuminate the drawer body.

[0011] The drawer assembly according to embodiments of the present invention has at least the following beneficial effects:

[0012] By installing a cover plate and a light preservation component on the shell, the cover plate can move vertically to reduce the gap between the cover plate and the upper edge of the drawer body. The light preservation component includes multiple light sources with different wavelengths of light emitted by the multiple light sources. The light emitted by the multiple light sources enters the drawer body, allowing the fruits and vegetables inside the drawer body to perform photosynthesis. On the one hand, it can increase the humidity in the storage cavity to reduce the loss of nutrients. On the other hand, the fruits and vegetables in the drawer body can synthesize nutrients through photosynthesis to increase the nutrient content, thereby improving the preservation effect of fruits and vegetables and extending the preservation period of fruits and vegetables.

[0013] According to some embodiments of the present invention, the housing includes a top plate, a first side plate and a second side plate, the first side plate and the second side plate are disposed opposite to each other, the top plate is connected to the first side plate and the second side plate, the top plate, the first side plate and the second side plate surround to form the receiving cavity, and the cover plate and the light preservation component are both disposed on the top plate.

[0014] According to some embodiments of the present invention, a guide structure is provided between the top plate and the cover plate, the guide structure being used to guide the cover plate to move in the vertical direction.

[0015] According to some embodiments of the present invention, the guide structure includes a guide hole and a guide shaft, one of the guide shaft and the guide hole is disposed on the cover plate and the other is disposed on the top plate, and the guide shaft passes through the guide hole.

[0016] According to some embodiments of the present invention, one end of the guide shaft is provided with a first limiting part, and when the drawer body is pulled out of the receiving cavity, the first limiting part can abut against the periphery of the guide hole.

[0017] According to some embodiments of the present invention, a plurality of first limiting portions are provided, and the plurality of first limiting portions are arranged circumferentially along the guide shaft, wherein the end of the first limiting portion away from the guide shaft is a free end.

[0018] According to some embodiments of the present invention, the cover plate is provided with a through hole, which extends through the cover plate in the vertical direction, and the light-emitting ends of the plurality of light sources are all facing the through hole.

[0019] According to some embodiments of the present invention, a sealing structure is provided between the cover plate and the top plate, the sealing structure being used to seal the through hole.

[0020] According to some embodiments of the present invention, the sealing structure includes a sealing protrusion and a sealing groove, one of which is disposed on the cover plate and the other on the top plate, and the sealing protrusion is accommodated in the receiving groove when the drawer body is pushed into the receiving cavity.

[0021] According to some embodiments of the present invention, the plurality of light sources include at least two of red light sources, blue light sources, and UVB light sources.

[0022] According to some embodiments of the present invention, the plurality of light sources include a red light source, a blue light source, and a UVB light source.

[0023] According to some embodiments of the present invention, a sealing element is connected to the upper end of the periphery of the opening, and when the drawer body is pushed into the receiving cavity, the drawer body abuts against the sealing element.

[0024] A refrigerator according to a second aspect of the present invention includes the drawer assembly described in the above embodiments.

[0025] The refrigerator according to an embodiment of the present invention has at least the following beneficial effects:

[0026] The drawer assembly using the first aspect embodiment, by providing a cover plate and a light preservation component on the housing, allows the cover plate to move vertically to reduce the gap between the cover plate and the upper edge of the drawer body. The light preservation component includes multiple light sources, each emitting light of a different wavelength, which illuminate the drawer body, enabling the fruits and vegetables inside to photosynthesize. This increases the humidity inside the cavity, reducing nutrient loss, and allows the fruits and vegetables in the drawer body to synthesize nutrients through photosynthesis, thereby increasing nutrient content and improving the preservation effect, thus extending the shelf life of the fruits and vegetables.

[0027] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0029] Figure 1 This is a schematic diagram of the structure of a drawer assembly according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the housing according to an embodiment of the present invention;

[0031] Figure 3 This is an exploded view of a drawer assembly according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of a cover plate according to an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the assembly of the top plate and the cover plate according to an embodiment of the present invention;

[0034] Figure 6 for Figure 5 A magnified view of part A in the middle;

[0035] Figure 7 This is a schematic diagram of the top plate structure according to an embodiment of the present invention;

[0036] Figure 8 for Figure 7 A magnified view of part B in the middle section;

[0037] Figure 9 This is a schematic diagram of the assembly of the drawer body and the cover plate according to an embodiment of the present invention;

[0038] Figure 10 This is an exploded view of the drawer body and cover plate according to an embodiment of the present invention;

[0039] Figure 11 A comparison chart showing the weight loss rate of lettuce stored in the drawer for 7 days under different relative humidities;

[0040] Figure 12 A comparison chart showing the respiration intensity of lettuce stored in a drawer for 7 days under different relative humidity levels.

[0041] Icon labels:

[0042] Housing 100, receiving cavity 101, opening 102, mounting groove 103, top plate 110, guide shaft 111, first limiting part 112, sealing groove 113, default groove 114, first side plate 120, second side plate 130;

[0043] Cover plate 200, sealing edge 201, guide hole 210, through hole 220, sealing protrusion 230, first groove 240, second groove 250, reinforcing protrusion 260, reinforcing rib 270;

[0044] Drawer body 300, flange 310, handle 320;

[0045] Light preservation component 400, box body 410, light guide plate 420;

[0046] Track 510, slider 520, seal 600. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0048] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0049] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0050] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0051] In related technologies, drawer assemblies generally include a cover and a drawer body. The cover can move vertically and seals the drawer under its own weight, improving the sealing effect of the drawer assembly and preventing fruits and vegetables inside from drying out. However, the interior of the drawer assembly is a closed space, which is not conducive to the accumulation of nutrients, resulting in excessive nutrient loss from fruits and vegetables and a relatively short shelf life.

[0052] Based on this, the present invention provides a cover plate 200 and a light preservation component 400 on the housing 100. The cover plate 200 can move in the vertical direction to reduce the gap between the cover plate 200 and the upper edge of the drawer body 300. The light preservation component 400 includes multiple light sources with different wavelengths of light emitted by the multiple light sources. The light emitted by the multiple light sources illuminates the inside of the drawer body 300, allowing the fruits and vegetables inside the drawer body 300 to perform photosynthesis. On the one hand, it can increase the humidity inside the accommodating cavity 101 to reduce the loss of nutrients. On the other hand, the fruits and vegetables in the drawer body 300 can synthesize nutrients through photosynthesis to increase the nutrient content, thereby improving the preservation effect of fruits and vegetables and extending the preservation period of fruits and vegetables.

[0053] If the drawer body 300 is not effectively sealed, the cooling air in the refrigerator compartment can easily enter the drawer body 300, causing the surface of fruits and vegetables inside the drawer body 300 to dry out and lose moisture, resulting in wrinkles on the surface of the fruits and vegetables and shortening their shelf life.

[0054] Based on this, refer to Figures 1 to 3 and combined Figure 9 , Figure 10 , Figure 1 and Figure 3The following diagrams show the structural schematic and exploded schematic of the drawer assembly according to an embodiment of the present invention. Figure 2 A schematic diagram of the housing structure according to an embodiment of the present invention is shown. Figure 9 This diagram illustrates the assembly of the drawer body 300 and the cover plate 200 according to an embodiment of the present invention. Figure 10 An exploded view of the drawer body 300 and cover 200 according to an embodiment of the present invention is shown. This drawer assembly according to an embodiment of the present invention can be applied to a refrigerator. As shown, the drawer assembly of this embodiment, by providing a cover 200 that can move vertically on the housing 100, allows the cover 200 to automatically seal the drawer body 300 under its own weight. The cover 200 effectively seals the drawer body 300, reducing the amount of cooling air entering the drawer body 300 and minimizing the impact of cooling air entering the drawer body 300 on fruits and vegetables, thereby extending the shelf life of fruits and vegetables.

[0055] It should be noted that a handle 320 is provided at the lower end of the drawer body 300 on the side away from the opening 102. Users can pull the drawer body 300 through the handle 320 to pull out or push the drawer body 300 into the receiving cavity 101, which makes it convenient for users to drive the drawer body 300 to slide.

[0056] It should be noted that the lower the relative humidity inside the containment chamber 101, the higher the weight loss rate of the fruits and vegetables, the higher the respiration intensity of the fruits and vegetables, the more severe the wilting, and the worse the freshness of the fruits and vegetables. The weight loss rate refers to the percentage of the difference between the initial weight and the weight after storage of the fruits and vegetables to the initial weight of the fruits and vegetables, that is, weight loss rate = 100% × (initial weight - weight after storage) / initial weight.

[0057] like Figure 11 , Figure 12 As shown, Figure 11 A comparison chart showing the weight loss rate of lettuce stored in the drawer at 300°C for 7 days under different relative humidity conditions. Figure 12 This is a comparison chart showing the respiration intensity of lettuce stored in drawer 300 for 7 days under different relative humidity levels. As shown in the figure, when the relative humidity (RH) in the receiving cavity 101 is greater than or equal to 90%, the weight loss of lettuce after 7 days of storage is less than or equal to 10%, and the respiration intensity of lettuce is significantly suppressed, keeping the lettuce firm and fresh. Therefore, a relative humidity of greater than or equal to 90% is the optimal range for storing lettuce for 7 days. By setting the cover 200 to ensure that the relative humidity in the receiving cavity 101 is greater than or equal to 90%, fruits and vegetables can achieve long-term preservation.

[0058] It should be noted that the upper edge of the drawer body 300 is folded outward to form a flange 310, and the cover plate 200 is provided with a sealing edge 201 on the side away from the top plate 110. Both the sealing edge 201 and the flange 310 are planar structures. When the drawer body 300 is pushed into the receiving cavity 101, the sealing edge 201 abuts against the flange 310, which can increase the contact area between the cover plate 200 and the drawer body 300, thereby improving the sealing effect of the cover plate 200 and reducing the amount of cooling air entering the interior of the drawer body 300.

[0059] Reference Figure 3 In this embodiment, the housing 100 is used to install in the refrigerator compartment. The housing 100 includes a first side plate 120, a top plate 110, and a second side plate 130 connected in sequence. The first side plate 120 and the second side plate 130 are arranged opposite each other in the left-right direction. The top plate 110 is connected to the upper ends of the first side plate 120 and the second side plate 130 respectively. The first side plate 120, the top plate 110, and the second side plate 130 enclose a receiving cavity 101. Since the light preservation component 400 itself has a certain weight and volume, by setting the cover plate 200 and the light preservation component 400 on the top plate 110 respectively, on the one hand, the overall weight of the cover plate 200 can be reduced, thereby reducing the friction between the cover plate 200 and the drawer body 300, thus improving the user experience. On the other hand, the light preservation component 400 can be prevented from occupying the internal space of the drawer body 300, thereby increasing the effective volume of the drawer body 300.

[0060] As another implementation, the light preservation component 400 can also be set on the cover plate 200. The light preservation component 400 can be installed on the side of the cover plate 200 facing the drawer body 300, and can also preserve the fruits and vegetables in the drawer body 300 by light. This will not be described in detail here.

[0061] It should be noted that the cover plate 200 is made of plastic. Plastic parts have higher structural strength, stronger corrosion resistance, and are more durable. The cover plate 200 can be made of materials such as polystyrene or polypropylene. Both polystyrene and polypropylene are non-toxic and environmentally friendly materials that can improve the safety of fruits and vegetables.

[0062] Reference Figure 4 , Figure 7 , Figure 4 A schematic diagram of the structure of a cover plate 200 according to an embodiment of the present invention is shown. Figure 7 A schematic diagram of the top plate 110 according to an embodiment of the present invention is shown. As shown in the figure, in this embodiment, in order to improve the moving stability of the cover plate 200, a guide structure is provided between the cover plate 200 and the top plate 110. The guide structure can guide the cover plate 200 to move in the vertical direction so that the cover plate 200 can stably abut against the upper edge of the drawer body 300, thereby improving the sealing effect of the drawer body 300 and increasing the relative humidity in the receiving cavity 101.

[0063] For example, the guide structure includes a guide hole 210 in the cover plate 200 and a guide shaft 111 in the top plate 110. The guide shaft 111 passes through the guide hole 210 and can abut against the side wall of the guide hole 210. The axial direction of the guide shaft 111 extends in the vertical direction, and the axial direction of the guide hole 210 extends in the corresponding vertical direction to restrict the horizontal movement of the cover plate 200 relative to the top plate 110. When the drawer body 300 is pulled out of the receiving cavity 101, the cover plate 200 is in its own... Under the influence of gravity, the cover plate 200 moves downward, so that the lower side of the cover plate 200 is slightly lower than the upper edge of the drawer body 300. When the drawer body 300 is pushed into the receiving cavity 101, the cover plate 200 moves upward with the cooperation of the guide shaft 111 and the guide hole 210. The lower side of the cover plate 200 abuts against the upper edge of the drawer body 300, which can guide the cover plate 200 to move in the vertical direction so that the cover plate 200 can stably abut against the upper edge of the drawer body 300, thereby increasing the relative humidity in the receiving cavity 101.

[0064] It should be noted that the top plate 110 and the guide shaft 111 are an integral structure. The top plate 110 and the guide shaft 111 can be integrally formed by injection molding, which can reduce the number of molds and reduce the production and manufacturing costs of the molds, thereby reducing the production and manufacturing costs of the drawer assembly. Of course, the guide shaft 111 can also be fixed to the top plate 110 by welding. The welding methods include, but are not limited to, resistance welding, laser welding, or ultrasonic welding.

[0065] As another implementation, the positions of the guide hole 210 and the guide shaft 111 can also be interchanged, that is, the guide hole 210 is provided on the top plate 110, and the guide shaft 111 is provided on the cover plate 200, which can also guide the cover plate 200 to move in the up and down direction, which will not be described in detail here.

[0066] In addition, the guide structure can also be a guide groove provided on the top plate 110 and a guide protrusion provided on the cover plate 200. The guide protrusion is accommodated in the guide groove and can abut against the side wall of the guide groove, and can also guide the cover plate 200 to move in the vertical direction, which will not be elaborated here.

[0067] It is understandable that the guide structure can also be set between the cover plate 200 and the first side plate 120 or between the cover plate 200 and the second side plate 130, which will not be elaborated here.

[0068] It should be noted that four guide holes 210 are configured, arranged in a rectangular array at intervals. Four guide shafts 111 are correspondingly configured, passing through the corresponding guide holes 210. This improves both the connection reliability between the cover plate 200 and the top plate 110 and the movement stability of the cover plate 200. Of course, in other specific embodiments, one, two, or three guide shafts 111 and guide holes 210 may be configured, and this is not limited here.

[0069] Reference Figure 5 , Figure 6 and combined Figure 8 , Figure 5 This diagram illustrates the assembly of the top plate 110 and the cover plate 200 according to an embodiment of the present invention. Figure 6 for Figure 5 A magnified view of part A in the middle. Figure 8 for Figure 7 A partial enlarged view of part B. As shown in the figure, in this embodiment, a first limiting part 112 is provided at the end of the guide shaft 111 away from the top plate 110. The first limiting part 112 is located on the side of the cover plate 200 away from the top plate 110. When the drawer body 300 is pulled out of the receiving cavity 101, the cover plate 200 moves downward, so that the first limiting part 112 can abut against the periphery of the guide hole 210, which can limit the cover plate 200 from continuing to move downward, so as to prevent the cover plate 200 from separating from the top plate 110 and causing the cover plate 200 to fall off automatically.

[0070] It should be noted that, for example, Figure 7As shown, the guide shaft 111 is hollow inside. To facilitate the assembly of the cover plate 200 and the top plate 110, a plurality of first limiting parts 112 are provided at the end of the guide shaft 111 away from the top plate 110. The plurality of first limiting parts 112 are spaced apart circumferentially along the guide shaft 111. The end of the first limiting part 112 away from the guide shaft 111 is a free end. A default groove 114 is formed between adjacent first limiting parts 112 at intervals. The default groove 114 penetrates the inner side of the guide shaft 111, the outer side of the guide shaft 111, and the end of the guide shaft 111, so that the end of the first limiting part 112 away from the guide shaft 111 can elastically shrink or expand. When assembling the cover plate 200, the guide shaft 111 is... The end away from the top plate 110 is aligned with and inserted into the guide hole 210. During this process, the side wall of the guide hole 210 abuts against the first limiting part 112, causing the end of the first limiting part 112 away from the guide shaft 111 to gradually approach the axis of the guide shaft 111, so that the guide shaft 111 can enter the guide hole 210. As the guide shaft 111 continues to move, when the end of the guide shaft 111 away from the top plate 110 extends out of the guide hole 210, the end of the first limiting part 112 away from the guide shaft 111 elastically expands, so that the first limiting part 112 can abut against the periphery of the guide hole 210, which can reduce the resistance encountered by the cover plate 200 during installation, thereby improving the assembly efficiency of the cover plate 200.

[0071] It should be noted that, in order to reduce the interference between the first limiting part 112 and the side wall of the guide hole 210, a chamfered structure or a rounded corner structure is provided on the outer periphery of the first limiting part 112, which can reduce the resistance encountered by the cover plate 200 during installation, thereby improving the assembly efficiency of the cover plate 200.

[0072] In this embodiment, in order to reduce the deformation of the guide hole 210, a reinforcing protrusion 260 and a plurality of reinforcing ribs 270 are provided around the guide hole 210. The reinforcing protrusion 260 has an annular structure. The guide hole 210 and the reinforcing protrusion 260 are coaxially arranged. The reinforcing ribs 270 are located between the reinforcing protrusion 260 and the periphery of the guide hole 210, and the plurality of reinforcing ribs 270 are spaced apart along the circumference of the guide hole 210. This can enhance the structural strength of the guide hole 210, reduce the deformation of the guide hole 210, and thus improve the service life of the cover plate 200.

[0073] In this embodiment, the cover plate 200 is provided with a through hole 220, which extends through the cover plate 200 in the vertical direction. The light-emitting ends of multiple light sources are all facing the through hole 220. The light emitted by the multiple light sources shines into the drawer body 300 through the through hole 220. On the one hand, it can save the material cost of the cover plate 200, thereby reducing the weight of the cover plate 200 and reducing the friction between the cover plate 200 and the drawer body 300. On the other hand, it can avoid the refraction of the light emitted by the multiple light sources when passing through the cover plate 200, which would cause the wavelength of the light emitted by the multiple light sources to change.

[0074] To improve the sealing performance of the drawer body 300, a sealing structure is provided between the cover plate 200 and the housing 100. The sealing structure is used to seal the through hole 220 to reduce the amount of cooling air entering the interior of the drawer body 300 through the through hole 220. This effectively seals the drawer body 300 and reduces the impact of cooling air entering the interior of the drawer body 300 on fruits and vegetables, thereby improving the preservation effect of fruits and vegetables.

[0075] For example, the sealing structure includes a sealing groove 113 on the top plate 110 and a sealing protrusion 230 on the cover plate 200. The sealing protrusion 230 is an annular structure and is arranged around the through hole 220 circumferentially. The sealing groove 113 is correspondingly an annular structure. The sealing protrusion 230 is accommodated in the receiving groove. When the drawer body 300 is pushed into the receiving cavity 101, the cover plate 200 moves upward, so that the cover plate 200 is close to the top plate 110. The gap between the bottom wall of the sealing groove 113 and the sealing protrusion 230 is reduced, thereby increasing the difficulty for cooling air to enter the through hole 220, so as to reduce the cooling air entering the interior of the drawer body 300 from the through hole 220, thereby improving the sealing effect of the drawer body 300.

[0076] It should be noted that the cover plate 200 is recessed on the side near the top plate 110 to form a first groove 240 and a second groove 250. The through hole 220, the first groove 240 and the second groove 250 are arranged coaxially from the inside to the outside. The first groove 240 and the second groove 250 are spaced apart to form a sealing protrusion 230. By setting the first groove 240 and the second groove 250, on the one hand, material costs can be saved to reduce the weight of the cover plate 200. On the other hand, the height of the sealing protrusion 230 can be reduced to reduce the overall height of the drawer assembly while ensuring the effective volume of the drawer body 300, thereby effectively utilizing the space of the refrigerator compartment.

[0077] As another implementation, the positions of the sealing groove 113 and the sealing protrusion 230 can also be interchanged, that is, the sealing groove 113 is provided on the cover plate 200, and the sealing protrusion 230 is provided on the top plate 110, which can also reduce the difficulty of cooling air entering the through hole 220, which will not be elaborated here.

[0078] As another implementation, the sealing structure may also include a sealing ring. The sealing ring is annular and located on the side of the cover plate 200 near the top plate 110. The sealing ring extends circumferentially along the through hole 220. When the drawer body 300 is pushed into the receiving cavity 101, the sealing ring is sandwiched between the top plate 110 and the cover plate 200, reducing the gap between them and sealing the through hole 220 in all directions. This prevents cooling air from entering the drawer body 300 through the through hole 220. Further details are omitted here. It is understood that, for easier positioning of the sealing ring, a positioning groove can also be provided on the side of the cover plate 200 near the top plate 110. The positioning groove is annular, and the sealing ring is housed within it, enabling circumferential positioning of the groove. Further details are omitted here.

[0079] Reference Figure 3 To improve the sealing effect of the drawer body 300, a sealing element 600 is provided at the upper end of the periphery of the opening 102. The sealing element 600 is made of rubber or silicone. When the drawer body 300 is pushed into the receiving cavity 101, the sealing element 600 is sandwiched between the periphery of the opening 102 and the drawer body 300, which can reduce the amount of cooling air entering the interior of the drawer body 300 from the gap between the periphery of the opening 102 and the drawer body 300, thereby improving the sealing effect of the drawer body 300.

[0080] Because the seal 600 is elastic, when the seal 600 is squeezed by the drawer body 300, the seal 600 can exert a reaction force on the drawer body 300, causing the drawer body 300 to move in the direction of the pull-out receiving cavity 101. This results in an excessive gap between the seal 600 and the drawer body 300, causing cooling air to flow into the interior of the drawer body 300 from the gap between the seal 600 and the drawer body 300, thus shortening the shelf life of fruits and vegetables.

[0081] Based on this, a limiting structure is provided between the drawer body 300 and the first side panel 120 or between the drawer body 300 and the second side panel 130. The limiting structure is used to restrict the drawer body 300 from moving along the direction of the pull-out receiving cavity 101, so that the sealing member 600 is sandwiched between the periphery of the opening 102 and the drawer body 300, which can reduce the gap between the sealing member 600 and the drawer body 300, thereby reducing the flow of cooling air into the drawer body 300 from the gap between the sealing member 600 and the drawer body 300, and thus extending the shelf life of fruits and vegetables.

[0082] For example, the limiting structure includes a second limiting part and a limiting groove. The second limiting part is provided on the drawer body 300, and the limiting groove is provided on the first side plate 120 or the second side plate 130. When the drawer body 300 is pushed into the receiving cavity 101, the second limiting part enters the limiting groove and can abut against the side wall of the limiting groove. When the drawer body 300 is pulled out of the receiving cavity 101 under the action of external force, the second limiting part also exits the limiting groove, which can reduce the gap between the sealing member 600 and the drawer body 300. This will not be elaborated further here.

[0083] In this embodiment, the drawer assembly also includes a slide rail assembly. There are two sets of slide rail assemblies. One of the two sets of slide rail assemblies is located between the first side panel 120 and the drawer body 300, and the other is located between the second side panel 130 and the drawer body 300. By setting the slide rail assembly, the drawer body 300 can be smoothly pushed into or pulled out of the receiving cavity 101, which can improve the user experience.

[0084] For example, the slide rail assembly includes a rail 510 and a slider 520. The rail 510 is respectively disposed on the first side plate 120 and the second side plate 130, and the slider 520 is respectively disposed on opposite sides of the drawer body 300 in the left and right direction. The slider 520 is slidably disposed on the rail 510, which can improve the smoothness of the drawer body 300 when sliding and improve the user experience.

[0085] In this embodiment, multiple light sources include red light, blue light, and UVB (ultraviolet radiation b) light. The wavelength of light emitted by the red light source is 630nm-670nm, the wavelength of light emitted by the blue light source is 430nm-470nm, and the wavelength of light emitted by UVB is 295nm-320nm. Red light can activate chemosynthesis and chlorophyll synthase activity, promoting the synthesis of chlorophyll and carotenoids. Blue light can regulate the upregulation of antioxidant gene expression, thereby increasing the levels of anthocyanins, polyphenols, and other nutrients during storage. UVB light can activate the conversion of ergosterol in mushrooms into vitamin D, and UVB also has a certain bactericidal effect, which can extend the shelf life of fruits and vegetables.

[0086] It should be noted that the effect of light source on fruits and vegetables is mainly related to the amount of light radiation they receive. Too little light radiation will not achieve the expected nutrient enhancement and preservation effect, while too much light radiation will damage the surface of the fruits and vegetables, causing discoloration, shrinkage and other adverse phenomena, thus affecting the preservation and nutrient enhancement effect.

[0087] It should be noted that, based on different wavelengths, ultraviolet radiation is divided into several different types, including UVA, UVB, and UVC.

[0088] As can be seen from Table 1, after two days of preservation under red light, blue light and UVB light treatment, the corresponding nutrients in fruits and vegetables were significantly increased.

[0089] Taking peaches as an example, under red light, blue light and UVB light treatment, the polyphenol enhancement rate is 1.19 times that under red light and blue light treatment and 1.25 times that under blue light treatment alone.

[0090] Taking cherry tomatoes as an example, under red light, blue light and UVB light treatment, the lycopene enhancement rate is 2.10 times that under red light and blue light treatment, 1.96 times that under blue light treatment alone and 2.12 times that under UVB treatment alone.

[0091] Taking winter jujubes as an example, under red light, blue light and UVB light treatment, the rate of increase in reducing sugar is 1.10 times that under red light and blue light treatment and 1.16 times that under blue light treatment alone.

[0092] Fruits and vegetables were preserved for seven days under red light, blue light, and UVB light treatment, and the corresponding nutrients in the fruits and vegetables were significantly improved.

[0093] Taking strawberries as an example, the anthocyanin enhancement rate under red light, blue light and UVB light treatment was 1.39 times that under red light and blue light treatment and 1.47 times that under blue light treatment alone.

[0094] Taking lettuce as an example, under red light, blue light and UVB light treatment, the increase rate of chlorophyll and carotenoids is 2.46 times that under red light and blue light treatment and 2.17 times that under red light treatment alone.

[0095] Taking matsutake mushrooms as an example, under red light, blue light and UVB light treatment, the polysaccharide increase rate of matsutake mushrooms was 1.57 times that under UVB treatment alone, and UVB can significantly increase vitamin D content.

[0096] Table 1. Comparison of nutrient enhancement levels in different fruits and vegetables under different light treatments

[0097]

[0098] As another implementation method, multiple light sources may also include red light sources and UVB light sources. Under the combined irradiation of red light and UVB, the content of chlorophyll or lycopene in the corresponding fruits and vegetables can be significantly increased.

[0099] As another implementation method, multiple light sources may also include blue light sources and UVB light sources. Under the combined irradiation of blue light and UVB, the content of anthocyanins, polyphenols or flavonoids in the corresponding fruits and vegetables can be significantly increased.

[0100] In this embodiment, the light preservation component 400 also includes a housing 410, a light guide plate 420, and a PCB board. The red light source, blue light source, and UVB light source are all disposed on the PCB board. The housing 410 has a light outlet, and the light guide plate 420 covers the light outlet. The PCB board is installed inside the housing 410. The red light source, blue light source, and UVB light source are all point light sources. The red light source, blue light source, and UVB light source cooperate with the light guide plate 420 to form a surface light source that illuminates the inside of the drawer body 300, which can expand the illumination range so that the fruits and vegetables inside the drawer body 300 are evenly illuminated, thereby improving the preservation effect of the fruits and vegetables.

[0101] It should be noted that the illumination time and intensity of red, blue, and UVB light sources among multiple light sources can be controlled through specific control programs to establish corresponding preservation modes, such as fruit preservation modes and vegetable preservation modes. Different preservation modes can be selected according to the type of food being stored, further improving the light preservation effect. For example, a control module can be set up to send control signals to the PCB board to control the working status of multiple light sources, thereby controlling the working status of the light sources, such as whether the light sources are turned on or off, which specific light source is turned on, the duration of the light source being turned on, and the light intensity.

[0102] In this embodiment, in order to facilitate the installation of the light preservation component 400, an installation groove 103 is provided on the side of the top plate 110 near the cover plate 200. The box body 410 is at least partially accommodated in the installation groove 103, which can circumferentially position the light preservation component 400 and improve the assembly efficiency of the light preservation component 400.

[0103] It should be noted that the box body 410 can be mounted on the top plate 110 via a snap-fit ​​structure. For example, the snap-fit ​​structure includes a slot in the box body 410 and a hook in the top plate 110. The hook portion of the hook is accommodated in the slot and can make contact with the side wall of the slot, facilitating the fixation of the box body 410. Further details are omitted here. Alternatively, the box body 410 can also be mounted on the top plate 110 using bolts, which will also be omitted here.

[0104] A refrigerator according to one embodiment of the present invention includes the drawer assembly of the above embodiments.

[0105] The refrigerator of this embodiment adopts the drawer assembly of the first aspect embodiment. By providing a cover plate 200 and a light preservation assembly 400 on the shell 100, the cover plate 200 can move in the vertical direction to reduce the gap between the cover plate 200 and the upper edge of the drawer body 300. The light preservation assembly 400 includes multiple light sources, each emitting light of different wavelengths. The light emitted by the multiple light sources illuminates the inside of the drawer body 300, allowing the fruits and vegetables inside the drawer body 300 to perform photosynthesis. On the one hand, this can increase the humidity inside the accommodating cavity 101 to reduce the loss of nutrients. On the other hand, the fruits and vegetables in the drawer body 300 can synthesize nutrients through photosynthesis to increase the nutrient content, thereby improving the preservation effect of the fruits and vegetables and extending their preservation period.

[0106] Since the refrigerator adopts all the technical solutions of the drawer assembly of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0107] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A drawer assembly for a refrigerator, characterized in that, include: The housing has a receiving cavity and an opening communicating with the receiving cavity; A cover plate is disposed within the receiving cavity and is movable in the vertical direction; The drawer body is capable of being pushed into or pulled out of the receiving cavity along the opening. When the drawer body is pushed into the receiving cavity, the cover plate abuts against the upper edge of the drawer body. A light-preservation component is disposed in the housing or the cover plate. The light-preservation component includes multiple light sources that can emit light of different wavelengths, and the light emitted by the multiple light sources can illuminate the drawer body.

2. The drawer assembly according to claim 1, characterized in that: The housing includes a top plate, a first side plate, and a second side plate. The first side plate and the second side plate are disposed opposite to each other. The top plate is connected to the first side plate and the second side plate. The top plate, the first side plate, and the second side plate enclose the receiving cavity. The cover plate and the light preservation component are both disposed on the top plate.

3. The drawer assembly according to claim 2, characterized in that: A guide structure is provided between the top plate and the cover plate, and the guide structure is used to guide the cover plate to move in the vertical direction.

4. The drawer assembly according to claim 3, characterized in that: The guiding structure includes a guide hole and a guide shaft. One of the guide shaft and the guide hole is located on the cover plate, and the other is located on the top plate. The guide shaft passes through the guide hole.

5. The drawer assembly according to claim 4, characterized in that: One end of the guide shaft is provided with a first limiting part, and when the drawer body is pulled out of the receiving cavity, the first limiting part can abut against the periphery of the guide hole.

6. The drawer assembly according to claim 4, characterized in that: Multiple first limiting portions are provided, and the multiple first limiting portions are arranged circumferentially along the guide shaft, with the end of the first limiting portion away from the guide shaft being a free end.

7. The drawer assembly according to claim 2, characterized in that: The cover plate has a through hole that extends through the cover plate in the vertical direction, and the light-emitting ends of the plurality of light sources all face the through hole.

8. The drawer assembly according to claim 7, characterized in that: A sealing structure is provided between the cover plate and the top plate, and the sealing structure is used to seal the through hole.

9. The drawer assembly according to claim 8, characterized in that: The sealing structure includes a sealing protrusion and a sealing groove. One of the sealing protrusion and the sealing groove is provided on the cover plate, and the other is provided on the top plate. When the drawer body is pushed into the receiving cavity, the sealing protrusion is accommodated in the receiving groove.

10. The drawer assembly according to any one of claims 1 to 9, characterized in that: The plurality of light sources include at least two of red light sources, blue light sources, and UVB light sources.

11. The drawer assembly according to any one of claims 1 to 9, characterized in that: The multiple light sources include red light sources, blue light sources, and UVB light sources.

12. The drawer assembly according to claim 1, characterized in that: A sealing element is connected to the upper end of the periphery of the opening. When the drawer body is pushed into the receiving cavity, the drawer body abuts against the sealing element.

13. A refrigerator, characterized in that: Includes the drawer assembly as described in any one of claims 1 to 12.

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