Radio frequency unfreezing device and refrigerator

Abstract

The utility model discloses a radio frequency unfreezing device and a refrigerator, and belongs to the technical field of radio frequency unfreezing. The radio frequency unfreezing device comprises a main body and a pole plate, the main body is provided with a radio frequency cavity and an unfreezing cavity, the pole plate is arranged in the radio frequency cavity and used for radiating radio frequency energy to the unfreezing cavity, and the radio frequency energy provided by the pole plate is reduced in the direction from the middle of the main body to the edge of the main body. After the design is adopted, the electromagnetic field intensity at the edges and corners of food materials is reduced, the thawing speed at the edges and corners of the food materials is reduced, non-uniform thawing caused by the corner effect of the food materials can be counteracted, and the more uniform thawing effect of each part of the food is realized.

Description

Technical Field

[0001] This application belongs to the technical field of radio frequency defrosting, and particularly relates to a radio frequency defrosting device and a refrigerator. Background Technology

[0002] Traditional defrosting methods, such as air defrosting and warm water defrosting, mainly rely on external heat conduction. These methods are slow and prone to nutrient loss and microbial contamination. Although microwave defrosting utilizes electromagnetic field penetration, its high frequency and poor penetration often result in overheating of the food surface while the interior remains cold, leading to uneven defrosting.

[0003] Radio frequency (RF) defrosting technology is gaining increasing attention due to its advantages such as rapid defrosting rate and greater penetration depth. RF defrosting utilizes electromagnetic waves of a specific frequency to cause polar molecules and ions in food to oscillate and generate heat, thus achieving rapid defrosting. Compared to microwave defrosting, RF defrosting, with its lower frequency and longer wavelength, can penetrate food more deeply, resulting in better defrosting quality.

[0004] However, in related technologies, when food is thawed using radio frequency defrosting devices, the thawing process is uneven across different parts of the food. Utility Model Content

[0005] This application aims to at least partially solve the technical problem of uneven food defrosting in related technologies using radio frequency defrosting devices. To this end, this application provides a radio frequency defrosting device and a refrigerator.

[0006] In a first aspect, embodiments of this application provide a radio frequency defrosting device, comprising:

[0007] The main body has a radio frequency cavity and a defrosting cavity;

[0008] An electrode plate, disposed in the radio frequency cavity, is used to radiate radio frequency energy into the thawing cavity. The radio frequency energy provided by the electrode plate decreases from the middle of the main body to the edge of the main body.

[0009] In some embodiments, the electrode plate includes:

[0010] A first electrode plate is disposed in the radio frequency cavity for radiating radio frequency energy to the defrosting cavity. The defrosting cavity is disposed on one side of the first electrode plate. In the direction from the middle of the main body to the edge of the main body, the distance from the first electrode plate to the defrosting cavity increases, or the thickness of the first electrode plate in the height direction of the main body decreases.

[0011] Alternatively, the electrode plate may further include a second electrode plate disposed in the radio frequency cavity for radiating radio frequency energy to the defrosting cavity, the defrosting cavity being disposed between the first electrode plate and the second electrode plate; wherein, in the direction from the middle of the body to the edge of the body, the distance between the first electrode plate and the second electrode plate increases, and / or, at least one of the first electrode plate and the second electrode plate has a smaller thickness in the height direction of the body.

[0012] In some embodiments, the first electrode plate has a first radiating surface, which is elliptical.

[0013] In some embodiments, the major axis of the first radiating surface is arranged along the length direction of the body, and the minor axis of the first radiating surface is arranged along the width direction of the body.

[0014] In some embodiments, the second electrode plate has a second radiating surface, which is elliptical.

[0015] In some embodiments, the major axis of the second radiating surface is arranged along the length direction of the body, and the minor axis of the second radiating surface is arranged along the width direction of the body.

[0016] In some embodiments, the geometric center of the first electrode plate, the geometric center of the second electrode plate, and the geometric center of the body coincide.

[0017] In some embodiments, the body is rectangular, and the minimum distance from the first electrode plate to the four side walls of the body is equal;

[0018] and / or

[0019] The minimum distance from the second electrode plate to the four side walls of the main body is equal.

[0020] In some embodiments, the thickness H1 of the first electrode plate in the height direction of the body is less than or equal to 15 mm; and / or

[0021] The thickness H2 of the second electrode plate in the height direction of the main body is less than or equal to 15 mm.

[0022] Secondly, embodiments of this application provide a refrigerator, including: a cabinet, a door, and the radio frequency defrosting device described in the first aspect, wherein the cabinet and the door together have a fixed cavity, and the radio frequency defrosting device is disposed in the fixed cavity.

[0023] In some embodiments, the inner wall of the fixing cavity is provided with a shielding layer.

[0024] This utility model has at least the following beneficial effects:

[0025] The radio frequency (RF) defrosting device includes a main body and electrodes. The main body has an RF cavity and a defrosting cavity. The electrodes are disposed in the RF cavity and are used to radiate RF energy into the defrosting cavity. The RF energy provided by the electrodes decreases from the center of the main body to its edge. This design reduces the electromagnetic field intensity at the edges and corners of the food, slows down the defrosting speed at these areas, and can counteract the uneven defrosting caused by the edge and corner effects, achieving a more uniform defrosting effect throughout the food. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the structure of the main body in one or more embodiments of this application is shown.

[0028] Figure 2 A schematic diagram of the structure after the main body is hidden in one or more embodiments of this application is shown.

[0029] Figure 3 It shows Figure 2 The front view.

[0030] Figure 4 It shows Figure 2 Top view.

[0031] Figure 5 A schematic diagram of the refrigerator structure with the door open is shown in one or more embodiments of this application.

[0032] Reference numerals: 1000-Refrigerator, 1000a-Fixed cavity, 100-Radio frequency defrosting device, 110-Main body, 110a-Radio frequency cavity, 110b-Defrosting cavity, 115-Electrode plate, 120-First electrode plate, 120a-First radiating surface, 130-Second electrode plate, 130a-Second radiating surface, 200-Box body, 300-Door body, 400-Shielding layer, 400a-First shielding surface, 400b-Second shielding surface. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that all directional indications in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Furthermore, in this utility model, descriptions involving "second," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "second," "second," etc., may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0037] In related technologies, when food is thawed using a radio frequency defrosting device, the edges and corners of the food thaw faster than the center, resulting in uneven thawing of different parts of the food.

[0038] Therefore, in related technologies, there is a technical problem of uneven thawing of different parts of food when thawing food using a radio frequency (RF) defrosting device. This application provides an RF defrosting device and a refrigerator, which can at least partially solve the technical problem of uneven thawing of different parts of food when thawing food using an RF defrosting device.

[0039] This application is described below with reference to the accompanying drawings and specific embodiments:

[0040] like Figures 1 to 4 As shown, the radio frequency defrosting device 100 includes a main body 110 and an electrode plate 115. The main body 110 has a radio frequency cavity 110a and a defrosting cavity 110b; the electrode plate 115 is disposed in the radio frequency cavity 110a and is used to radiate radio frequency energy to the defrosting cavity 110b. The radio frequency energy provided by the electrode plate 115 decreases from the middle of the main body 110 to the edge of the main body 110.

[0041] The radio frequency cavity 110a is used to mount the electrode plate 115, which is installed inside the radio frequency cavity 110a. The defrosting cavity 110b is used to contain food to be defrosted, and the food is placed inside the defrosting cavity 110b. The electrode plate 115 radiates radio frequency energy, exciting water molecules in the food to vibrate at high frequency, generating heat, thereby defrosting the food in the defrosting cavity 110b. The materials and circuit principles of the electrode plate 115 are varied and are known to those skilled in the art, and will not be described in detail here.

[0042] From the center of the main body 110 to its edge, the radio frequency energy provided by the electrode 115 decreases. In other words, the electric field strength of the electrode 115 weakens from the center of the main body 110 to its edge. This design reduces the electromagnetic field strength at the edges and corners of the food, slows down the defrosting speed at the edges and corners, and can counteract the uneven defrosting caused by the edge and corner effect of the food, thus achieving a more uniform defrosting effect for all parts of the food.

[0043] In some embodiments, the electrode plate 115 includes a first electrode plate 120, which is disposed in the radio frequency cavity 110a and is used to radiate radio frequency energy to the defrosting cavity 110b. The defrosting cavity 110b is disposed on one side of the first electrode plate 120, and the distance between the first electrode plate 120 and the defrosting cavity 110b increases in the direction from the middle of the body 110 to the edge of the body 110.

[0044] The first electrode plate 120 protrudes towards the radio frequency cavity 110a, making the distance from the middle region of the first electrode plate 120 to the defrosting cavity 110b smaller, and the distance from the edge region to the defrosting cavity 110b larger. This design makes the electric field strength of the first electrode plate 120 weaker from the middle of the first electrode plate 120 towards the edge, thereby reducing the electromagnetic field strength at the edges and corners of the food, reducing the defrosting speed at the edges and corners of the food, and offsetting the uneven defrosting caused by the edge and corner effect of the food, thus achieving a more uniform defrosting effect.

[0045] In some embodiments, the electrode 115 includes not only the first electrode 120 but also a second electrode 130. Both the first electrode 120 and the second electrode 130 are disposed in the radio frequency cavity 110a, and both the first electrode 120 and the second electrode 130 are used to radiate radio frequency energy to the defrosting cavity 110b. The defrosting cavity 110b is disposed between the first electrode 120 and the second electrode 130; wherein, the distance between the first electrode 120 and the second electrode 130 increases in the direction from the middle of the main body 110 to the edge of the main body 110.

[0046] The radio frequency cavity 110a is used to mount the first electrode plate 120 and the second electrode plate 130, both of which are installed within the radio frequency cavity 110a. The first electrode plate 120 and the second electrode plate 130 are spaced apart, and the defrosting cavity 110b is located between the first electrode plate 120 and the second electrode plate 130. Food to be defrosted is placed in the defrosting cavity 110b. The first electrode plate 120 and the second electrode plate 130 radiate radio frequency energy into the defrosting cavity 110b, exciting water molecules in the food to vibrate at high frequency, generating heat, thereby defrosting the food in the defrosting cavity 110b. The materials and circuit principles of the first electrode plate 120 and the second electrode plate 130 are diverse and known to those skilled in the art, and will not be elaborated upon here. From the center of the main body 110 to its edge, the distance between the first electrode 120 and the second electrode 130 increases. In other words, along the direction from the center of the first electrode 120 to its edge, the spacing between the first electrode 120 and the second electrode 130 increases. This design results in a smaller distance in the central region and a larger spacing at the edges of the first electrode 120 and the second electrode 130. Consequently, the electric field strength between the first electrode 120 and the second electrode 130 weakens from the center of the first electrode 120 towards the edge. This reduces the electromagnetic field strength at the edges and corners of the food, slowing down the thawing process at these areas. This counteracts the uneven thawing caused by the corner effect, resulting in a more uniform thawing effect.

[0047] In some embodiments, the first electrode plate 120 protrudes toward the second electrode plate 130, and the second electrode plate 130 protrudes toward the first electrode plate 120, so that the distance between the first electrode plate 120 and the second electrode plate 130 increases in the direction from the middle of the body 110 to the edge of the body 110.

[0048] In some embodiments, the first electrode plate 120 is located above the second electrode plate 130, such as... Figure 3 As shown, the first electrode 120 has a downward convex shape, and the second electrode 130 has an upward convex shape. The first electrode 120 and / or the second electrode 130 can be a curved plate structure with a uniform thickness from the middle to the edge, similar to an ellipsoidal shape, with the middle region closer to the thawing chamber 110b; or the thickness can decrease from the middle to the edge, similar to an ellipsoidal boss structure.

[0049] Of course, in some other embodiments, the first electrode plate 120 is convex downwards and the second electrode plate 130 is flat; or the first electrode plate 120 is flat and the second electrode plate 130 is convex upwards. This also achieves the goal that the distance between the first electrode plate 120 and the second electrode plate 130 increases from the middle of the main body 110 to its edge. Alternatively, the first electrode plate 120 may be convex downwards and the second electrode plate 130 may not be provided; or the second electrode plate 130 may be convex upwards and the first electrode plate 120 may not be provided. This also falls within the scope of protection of this application.

[0050] In some embodiments, two radio frequency (RF) cavities 110a are provided, spaced apart along the height direction of the main body 110, and a defrosting cavity 110b is disposed between the two RF cavities 110a. A first electrode plate 120 is installed in the RF cavity 110a located above the defrosting cavity 110b. A second electrode plate 130 is installed in the RF cavity 110a located below the defrosting cavity 110b.

[0051] In some embodiments, the main body 110 is cuboid in shape and includes an upper top wall, a lower top wall and four side walls. The direction from the middle of the main body 110 to the edge of the main body 110 refers to the direction from the middle of the main body 110 to the side walls of the main body 110.

[0052] like Figure 3 As shown, in some embodiments, the thickness of the first electrode plate 120 decreases in the height direction of the body 110 from the middle of the body 110 to the edge of the body 110.

[0053] In other words, along the direction from the center to the edge of the first electrode plate 120, the dimension of the first electrode plate 120 decreases along the height direction of the main body 110. The first electrode plate 120 is thicker in the middle, and its thickness decreases from the middle to the edge. This design can reduce the edge effect during the defrosting process, that is, the local overheating of food caused by the concentration of electric field lines at the edges of the food. By adjusting the thickness of the first electrode plate 120, the distribution of the electric field can be made more uniform, achieving a more consistent heating effect within the defrosting chamber 110b, and avoiding the problem of incomplete defrosting in the center of the food while the edges are overheated.

[0054] like Figure 3 and Figure 4 As shown, in some embodiments, the first electrode plate 120 has a first radiating surface 120a, which is elliptical.

[0055] The lower end face of the first electrode 120 is the first radiating surface 120a. The elliptical outline has a smooth transition without sharp corners. Compared with shapes with sharp edges or corners, radio frequency energy generated on the first electrode 120 will not accumulate at the corners, making it less likely for heat to accumulate. This can prevent localized overheating of food, improve the uniformity of thawing, and result in better preservation of color, texture, and nutrients in thawed food. It also reduces the potential for juice loss and food quality degradation during the thawing process.

[0056] In some embodiments, the major axis of the first radiating surface 120a is arranged along the length direction of the body 110, and the minor axis of the first radiating surface 120a is arranged along the width direction of the body 110.

[0057] The major axis of the first electrode plate 120 is aligned with the length direction of the main body 110, and the minor axis of the second electrode plate 130 is aligned with the width direction of the main body 110. This design allows the shape of the electrode plates to match the spatial layout of the main body 110, which helps to improve the space utilization of the main body 110. The major and minor axes of the elliptical electrode plates correspond to the length and width of the main body 110, respectively, which also helps to form a more uniform radio frequency energy field in the defrosting chamber 110b. This layout can reduce dead zones of energy in the defrosting chamber 110b, ensuring that all parts of the food are heated evenly during the defrosting process.

[0058] like Figure 3 As shown, in some embodiments, the thickness of the second electrode plate 130 in the height direction of the body 110 decreases from the middle of the body 110 to the edge of the body 110.

[0059] In other words, along the direction from the center to the edge of the second electrode plate 130, the dimension of the second electrode plate 130 decreases along the height direction of the main body 110. The second electrode plate 130 is thicker in the center and decreases in thickness from the center to the edge. This design can reduce the edge effect during the defrosting process, that is, the local overheating of food caused by the concentration of electric field lines at the edges of the food. By adjusting the thickness of the second electrode plate 130, the distribution of the electric field can be made more uniform, achieving a more consistent heating effect within the defrosting chamber 110b, and avoiding the problem of incomplete defrosting in the center of the food while the edges are overheated.

[0060] like Figure 3 and Figure 4 As shown, in some embodiments, the second electrode plate 130 has a second radiating surface 130a, which is elliptical.

[0061] The lower end face of the second electrode plate 130 is the second radiating surface 130a. The elliptical outline has a smooth transition without sharp corners. Compared with shapes with sharp edges or corners, radio frequency energy generated on the second electrode plate 130 will not accumulate at the corners, making it less likely for heat to accumulate. This can prevent localized overheating of food, improve the uniformity of thawing, and result in better preservation of color, texture, and nutrients in thawed food. It also reduces the potential for juice loss and food quality degradation during the thawing process.

[0062] In some embodiments, the major axis of the second radiating surface 130a is arranged along the length direction of the body 110, and the minor axis of the second radiating surface 130a is arranged along the width direction of the body 110.

[0063] The major axis of the second electrode plate 130 is aligned with the length direction of the main body 110, and the minor axis of the second electrode plate 130 is aligned with the width direction of the main body 110. This design allows the shape of the electrode plate to match the spatial layout of the main body 110, which helps to improve the space utilization of the main body 110. The major and minor axes of the elliptical electrode plate correspond to the length and width of the main body 110, respectively, which also helps to form a more uniform radio frequency energy field in the defrosting chamber 110b. This layout can reduce dead zones of energy in the defrosting chamber 110b, ensuring that all parts of the food are heated evenly during the defrosting process.

[0064] In some embodiments, the first electrode 120 and / or the second electrode 130 are frustum-shaped, meaning the central region of the electrode is flat and of uniform thickness. The edge regions of the electrode are located further away from the central region towards the thawing chamber 110b, or the thickness of the edge regions may be reduced relative to the central region. The first electrode 120 and / or the second electrode 130 may also be of other shapes, as long as the thickness of the first electrode 120 and / or the second electrode 130 decreases in the height direction of the main body 110. This decrease can be gradual or non-uniform.

[0065] Of course, in some other embodiments, the thickness of both the first electrode plate 120 and the second electrode plate 130 in the height direction of the body 110 can decrease from the middle of the body 110 to the edge of the body 110; or the first electrode plate 120 can be flat, and the thickness of the second electrode plate 130 in the height direction of the body 110 can decrease, in which case both sides of the second electrode plate 130 can face the first electrode plate 120; or the second electrode plate 130 can be flat, and the thickness of the first electrode plate 120 in the height direction of the body 110 can decrease, in which case both sides of the first electrode plate 120 can face the second electrode plate 130.

[0066] Of course, it is also possible to reduce the thickness of the first electrode plate 120 in the height direction of the main body 110 and not to set the second electrode plate 130; or reduce the thickness of the second electrode plate 130 in the height direction of the main body 110 and not to set the first electrode plate 120. This is also within the scope of protection of this application.

[0067] In some embodiments, the geometric center of the first electrode plate 120, the geometric center of the second electrode plate 130, and the geometric center of the main body 110 coincide.

[0068] Since the radio frequency energy is radiated symmetrically from the two plates, the geometric centers of the first plate 120, the second plate 130, and the main body 110 coincide, which helps to create a uniform radio frequency energy field in the defrosting chamber 110b. This helps to ensure that all parts of the food are heated evenly during the defrosting process, thereby avoiding the problem of local overheating or incomplete defrosting of the food and making the food defrosting effect better.

[0069] In some embodiments, the main body 110 is cuboid in shape, and the minimum distance from the first electrode plate 120 to the four side walls of the main body 110 is equal; and / or the minimum distance from the second electrode plate 130 to the four side walls of the main body 110 is equal.

[0070] That is, the minimum distance from the first electrode plate 120 to the four side walls of the main body 110 is equal, or the minimum distance from the second electrode plate 130 to the four side walls of the main body 110 is equal, or the minimum distance from the first electrode plate 120 to the four side walls of the main body 110 is equal and the minimum distance from the second electrode plate 130 to the four side walls of the main body 110 is equal.

[0071] With this design, the distances from the first electrode plate 120 to each sidewall of the main body 110 are equal, which reduces the differences in electric field strength caused by varying distances between the first electrode plate 120 and the sidewalls, achieving a uniform energy distribution throughout the thawing chamber 110b. A uniform energy distribution improves thawing efficiency because every part of the food receives similar energy during the thawing process, reducing the risk of localized overheating or uneven thawing. This helps preserve the texture, color, and nutritional value of the food.

[0072] Similarly, the equal distances from the second electrode 130 to each sidewall of the main body 110 reduce the differences in electric field strength caused by varying distances between the second electrode 130 and the sidewalls, achieving a uniform energy distribution throughout the thawing chamber 110b. This uniform energy distribution improves thawing efficiency because every part of the food receives similar energy during the thawing process, reducing the risk of localized overheating or uneven thawing. This helps preserve the texture, color, and nutritional value of the food.

[0073] In some embodiments, the thickness H1 of the first electrode plate 120 in the height direction of the body 110 is less than or equal to 15 mm; and / or the thickness H2 of the second electrode plate 130 in the height direction of the body 110 is less than or equal to 15 mm.

[0074] That is, the thickness of the first electrode plate 120 in the height direction of the main body 110 is not greater than 15mm, or the thickness of the second electrode plate 130 in the height direction of the main body 110 is not greater than 15mm, or the thickness of the first electrode plate 120 in the height direction of the main body 110 is not greater than 15mm and the thickness of the second electrode plate 130 in the height direction of the main body 110 is not greater than 15mm.

[0075] By controlling the thickness of the first electrode plate 120 to within 15mm, the volume of the defrosting chamber can be increased within a limited space, thereby adapting to the defrosting needs of food of different volumes and improving space utilization efficiency. Keeping the thickness of the first electrode plate 120 within 15mm helps reduce energy loss in the electrode material, allowing more radio frequency energy to penetrate to the food, thus improving defrosting efficiency. It also helps to ensure a uniform electric field distribution, reducing differences in electric field intensity caused by uneven electrode plate thickness, thereby improving defrosting uniformity.

[0076] Similarly, by controlling the thickness of the second electrode plate 130 to within 15mm, the volume of the defrosting chamber can be increased within a limited space, thereby adapting to the defrosting needs of food of different volumes and improving space utilization efficiency. Keeping the thickness of the second electrode plate 130 to within 15mm helps reduce energy loss in the electrode material, allowing more radio frequency energy to penetrate to the food, thus improving defrosting efficiency. It also helps to ensure a more uniform electric field distribution, reducing differences in electric field intensity caused by uneven electrode plate thickness, thereby improving defrosting uniformity.

[0077] like Figure 5 As shown, based on the same inventive concept, this application also provides a refrigerator 1000, including a cabinet 200, a door 300 and the above-mentioned radio frequency defrosting device 100. The cabinet 200 and the door 300 together have a fixed cavity 1000a, and the radio frequency defrosting device 100 is disposed in the fixed cavity 1000a.

[0078] The refrigerator body 200 and door 300 together form a fixed cavity 1000a. The radio frequency defrosting device 100 is installed inside the fixed cavity 1000a. After opening the door 300, the radio frequency defrosting device 100 can be seen inside, and food can be placed in or removed from the defrosting cavity 110b of the radio frequency defrosting device 100. Integrating the radio frequency defrosting device 100 into the fixed cavity 1000a of the refrigerator 1000 utilizes the internal space of the refrigerator 1000, reducing the space occupied in the kitchen. At the same time, this integrated design allows the refrigerator 1000 to not only have traditional refrigeration and freezing functions, but also add the additional function of rapid defrosting, meeting users' needs for multifunctional home appliances. Since the refrigerator 1000 has the aforementioned radio frequency defrosting device 100, it also has all the beneficial effects of the radio frequency defrosting device 100, which will not be elaborated here.

[0079] In some embodiments, the inner wall of the fixing cavity 1000a is provided with a shielding layer 400.

[0080] Since the housing 200 and the door 300 together form a fixed cavity 1000a, the shielding layer 400 is disposed on the inner wall of both the housing 200 and the door 300 forming the fixed cavity 1000a. When the first electrode 120 and the second electrode 130 radiate energy to the food to be thawed, the shielding layer 400 can shield the radiated energy, preventing energy leakage, increasing the food's absorption rate of radio frequency energy, thereby improving the thawing effect, reducing potential harm to the user, and enhancing user safety. Furthermore, disposing of the shielding layer 400 on the inner wall of the fixed cavity 1000a, rather than on the radio frequency thawing device 100, helps reduce the structural complexity of the radio frequency thawing device 100 and facilitates its manufacturing. The structure and material of the shielding layer 400 are diverse and known to those skilled in the art, and are not limited in this application.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0082] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0083] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A radio frequency thawing device, characterized in that, The application relates to a thawing device, comprising: a main body (110) having a radio frequency cavity (110a) and a thawing cavity (110b); a polar plate (115) arranged in the radio frequency cavity (110a) and used for radiating radio frequency energy to the thawing cavity (110b), wherein the radio frequency energy provided by the polar plate (115) decreases from the middle of the main body (110) to the edge of the main body (110).

2. The radio frequency thawing device of claim 1, wherein, The polar plate (115) comprises: a first polar plate (120) arranged in the radio frequency cavity (110a) and used for radiating radio frequency energy to the thawing cavity (110b), wherein the thawing cavity (110b) is arranged on one side of the first polar plate (120), the distance from the first polar plate (120) to the thawing cavity (110b) increases from the middle of the main body (110) to the edge of the main body (110), or the thickness of the first polar plate (120) in the height direction of the main body (110) decreases; or the polar plate (115) further comprises a second polar plate (130), the second polar plate (130) is arranged in the radio frequency cavity (110a) and used for radiating radio frequency energy to the thawing cavity (110b), and the thawing cavity (110b) is arranged between the first polar plate (120) and the second polar plate (130); wherein the distance between the first polar plate (120) and the second polar plate (130) increases from the middle of the main body (110) to the edge of the main body (110), and / or the thickness of at least one of the first polar plate (120) and the second polar plate (130) in the height direction of the main body (110) decreases.

3. The radio frequency thawing device of claim 2, wherein, The first polar plate (120) has a first radiation surface (120a), and the first radiation surface (120a) is elliptical.

4. The radio frequency thawing apparatus of claim 3, wherein, The long axis of the first radiation surface (120a) is arranged in the length direction of the main body (110), and the short axis of the first radiation surface (120a) is arranged in the width direction of the main body (110).

5. The radio frequency thawing apparatus of claim 2, wherein, The second polar plate (130) has a second radiation surface (130a), and the second radiation surface (130a) is elliptical.

6. The radio frequency thawing device of claim 5, wherein, The long axis of the second radiation surface (130a) is arranged in the length direction of the main body (110), and the short axis of the second radiation surface (130a) is arranged in the width direction of the main body (110).

7. The radio frequency thawing apparatus of any of claims 2-6, wherein, The geometric center of the first polar plate (120), the geometric center of the second polar plate (130) and the geometric center of the main body (110) coincide.

8. The radio frequency thawing device of claim 7, wherein, The main body (110) is cuboid-shaped, the minimum distances from the first polar plate (120) to four side walls of the main body (110) are equal; and / or the minimum distances from the second polar plate (130) to the four side walls of the main body (110) are equal.

9. The radio frequency thawing apparatus of any of claims 2-6, wherein, The thickness H1 of the first polar plate (120) in the height direction of the main body (110) is less than or equal to 15 mm; and / or the thickness H2 of the second polar plate (130) in the height direction of the main body (110) is less than or equal to 15 mm.

10. A refrigerator characterized by comprising: The radio frequency thawing device (100) as claimed in any one of claims 1-9, a cabinet (200) and a door body (300) are provided with a fixed cavity (1000a) in common, and the radio frequency thawing device (100) is arranged in the fixed cavity (1000a).

11. The refrigerator according to claim 10, characterized in that, An inner wall of the fixed cavity (1000a) is provided with a shielding layer (400).

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