Heat dissipation element, cooking utensil cover and cooking utensil

Abstract

The present invention relates to a heat sink, a cooking utensil cover, and a cooking utensil. The heat sink includes a heat sink, which includes a plurality of heat sink portions. The plurality of heat sink portions in the heat sink are arranged along a preset trajectory, and each heat sink portion has a first heat dissipation channel connected to the outside world. Every two adjacent heat sink portions are connected to each other, and a second heat dissipation channel connected to the outside world is defined between them. When the heat sink is assembled on a cover plate, all the heat sink portions in the heat sink are in contact with the cover plate, increasing the contact area between the heat sink and the cover plate, thereby improving the heat dissipation effect. In addition, the heat sink has a plurality of heat dissipation channels inside, which increases the heat dissipation area. When air is forced to flow into the heat sink by convection, the plurality of heat dissipation channels allow the airflow to flow smoothly through the heat sink, reducing the wind resistance on the airflow path, allowing the airflow to quickly remove the heat from the heat sink, and further improving the heat dissipation performance.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, in particular to a heat sink, a cooking utensil cover and a cooking utensil. Background Art

[0002] Cooking appliances, including rice cookers and pressure cookers, are used to process food. Pressure cookers offer a pressure cooking function, sealing and heating the food inside to generate steam and pressurize it, thereby increasing the cooking temperature and pressure inside the pot and shortening the cooking time. With economic development, pressure cookers have become an indispensable cooking appliance for modern, fast-paced life. However, after a pressure cooker finishes high-pressure cooking, because the pressure inside is greater than the external atmospheric pressure, the user cannot open the pressure cooker immediately. This is especially true when making soup or liquid or viscous foods. The air cannot be released directly for rapid cooling, and natural cooling requires a long wait time, making it impossible to achieve the desired quick cooking effect.

[0003] In addition, when pressure cooking food, users often set different pressure cooking times for different foods to ensure the final cooking taste. However, when the pressure cooker actually calculates the pressure cooking time, it does not take into account the additional cooking time caused by the pressure drop process in the pressure cooker. Therefore, the actual pressure cooking time of the food is extended, and there is a discrepancy between the set pressure cooking time and the actual cooking time. The slow pressure release of the pressure cooker will affect the taste of the food, especially for foods that are sensitive to the pressure cooking time, the taste of which will be more affected.

[0004] Therefore, traditional cooking utensils cannot quickly cool down and release pressure, which will affect the cooking time and cooking taste. Summary of the Invention

[0005] Based on this, it is necessary to provide a heat sink, a cooking utensil cover and a cooking utensil to address the problem that traditional cooking utensil cannot quickly cool down and release pressure.

[0006] A heat sink, comprising a heat sink, the heat sink comprising a plurality of heat sinks, the heat sinks being arranged along a predetermined trajectory, each heat sink having a first heat sink channel communicating with the outside world; and each adjacent heat sink being connected to each other, with a second heat sink channel communicating with the outside world being defined therebetween.

[0007] Among them, along the direction perpendicular to the preset trajectory, the value range of the height H of the heat dissipation portion is: 0mm <H<55mm。

[0008] When assembling the heat dissipation component on the cover plate, all the heat dissipation parts in the heat dissipation component are in contact with the cover plate, so that the whole heat dissipation component is effectively in contact with the cover plate, increasing the contact area between the heat dissipation component and the cover plate and improving the heat dissipation effect. In addition, each heat dissipation part in the heat dissipation body has a first heat dissipation channel, and a second heat dissipation channel is formed between two adjacent heat dissipation parts. Thus, there are multiple heat dissipation channels inside the heat dissipation body, increasing the heat dissipation area. And when air is forced to flow into the heat dissipation body in a convection manner, the multiple heat dissipation channels allow the air flow to flow smoothly through the heat dissipation body, reducing the wind resistance on the air flow path and allowing the air flow to quickly take away the heat on the heat dissipation body, further improving the heat dissipation performance. Moreover, along the direction perpendicular to the preset trajectory, that is, in the direction perpendicular to the cover plate, the height of the heat dissipation part is H, and the value range of H is: 0mm < H < 55mm. When the height of the heat dissipation part is within this range, the heat dissipation efficiency is relatively good.

[0009] In one embodiment, the preset trajectory is part or all of a virtual circle, and the heat dissipation part, the first heat dissipation channel and the second heat dissipation channel all extend along the radial direction of the virtual circle.

[0010] In one embodiment, the length of the heat dissipation part along its own extension direction is F, with the unit of mm, the number of the heat dissipation parts is N, and the outer diameter of the heat dissipation part is R, with the unit of mm. F * N * H / R ≤ 3630mm.

[0011] In one embodiment, each heat dissipation part includes two oppositely arranged heat dissipation fins and a first connecting part. The first connecting part is connected between the same sides of the two heat dissipation fins and jointly encloses the first heat dissipation channel with the two heat dissipation fins.

[0012] In one embodiment, the heat dissipation body further includes a second connecting part. The second connecting part is connected between the same sides of two adjacent heat dissipation parts and jointly encloses the second heat dissipation channel with two adjacent second connecting parts.

[0013] In one embodiment, the heat dissipation body is constructed by bending a plurality of the heat dissipation parts arranged in a straight line according to the preset trajectory.

[0014] In one embodiment, the number of the heat dissipation bodies is multiple. The multiple heat dissipation bodies are sleeved with each other along the direction intersecting with the direction where the preset trajectory is located. And the first heat dissipation channel of one of two adjacent heat dissipation bodies is communicated with the first heat dissipation channel and / or the second heat dissipation channel of the other, and the second heat dissipation channel of one of two adjacent heat dissipation bodies is communicated with the first heat dissipation channel and / or the second heat dissipation channel of the other.

[0015] A cooking utensil cover comprises a cover plate and the above-mentioned heat dissipation element, wherein the heat dissipation element is arranged on the cover plate.

[0016] In one embodiment, the cooking appliance cover further includes a housing, which is sleeved over a side of the heat sink facing away from the cover and connected to the cover. The housing includes an air inlet and an air outlet. The air inlet is located at the same end of all the first heat dissipation channels and all the second heat dissipation channels, and the air outlet is located at the other end of all the first heat dissipation channels and all the second heat dissipation channels. Both the air inlet and the air outlet are in communication with all the first heat dissipation channels and all the second heat dissipation channels.

[0017] A cooking utensil comprises a pot, a fan and the above-mentioned cooking utensil cover, wherein the cooking utensil cover can be opened and closed relative to the pot, and the fan is arranged on either the cooking utensil cover or the pot and is used to drive air flow through the heat sink.

[0018] In one embodiment, the cooking appliance further includes an air supply duct, the fan is provided on the pot body, the air supply duct is connected between the heat sink and the fan, and the air supply duct is constructed as a flexible member. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a cooking utensil cover according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 An exploded schematic diagram of the cooking utensil cover shown;

[0021] Figure 3 for Figure 1 A schematic diagram of the structure of the heat dissipation element in the cover of the cooking utensil shown;

[0022] Figure 4 for Figure 3 The schematic diagram of the structure of the heat sink and the cover plate assembly shown;

[0023] Figure 5 A schematic structural diagram of the assembly of a heat sink and a cover plate from one perspective in another embodiment of the present invention;

[0024] Figure 6 for Figure 5 A schematic structural diagram of the assembly of the heat sink and the cover plate from another perspective;

[0025] Figure 7 for Figure 3 A schematic structural diagram of the heat sink in its original state;

[0026] Figure 8A schematic diagram of a portion of the structure of a cooking appliance according to an embodiment of the present invention;

[0027] Figure 9 for Figure 1 The curve relationship between the heat dissipation capacity of the cooking utensil cover and the fin height is shown.

[0028] 100. Cooking utensil cover; 10. Cover plate; 30. Heat sink; 31. Heat sink; 32. Heat dissipation portion; 321. Heat sink; 323. First connection portion; 33. First heat dissipation channel; 34. Second heat dissipation channel; 35. Turbine hole; 40. Second connection portion; 50. Housing; 52. Air inlet; 54. Air outlet; 200. Fan; 210. Air supply duct. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0035] See Figure 1 In one embodiment of the present invention, a cooking appliance is provided. The cooking appliance includes a cooking appliance cover 100 and a pot (not shown). The cooking appliance cover 100 is openable and closable relative to the pot to seal or open the cooking space within the pot. The cooking appliance is a pressure cooker or a device such as an electric rice cooker with a pressure cooking function, which is not limited herein.

[0036] In some embodiments, the cooking appliance cover 100 includes a cover plate 10 and a heat sink 30, which is disposed on the cover plate 10. When the cooking appliance is in operation, the cover plate 10 faces the cooking space within the pot. Heat within the cooking space is transferred to the cover plate 10, and the heat sink 30, in contact with the cover plate 10, removes the heat from the cover plate 10, thereby rapidly cooling the cooking space and achieving a rapid pressure relief effect.

[0037] See Figure 3-Figure 4The heat sink 30 includes a heat sink 31 having multiple heat dissipation channels, each of which is connected to the outside world. Each heat dissipation channel is configured to have a heat dissipation opening, and the heat dissipation openings of two adjacent heat dissipation channels face opposite directions. The heat sink 31 is configured to deform along a predetermined trajectory, with at most the heat dissipation channels arranged along the predetermined trajectory. This means that the heat sink 31 is formed with multiple heat dissipation channels, with the heat dissipation openings of two adjacent heat dissipation channels facing opposite directions, allowing the heat sink 31 to deform in the direction in which the multiple heat dissipation channels are arranged. This allows the heat sink 31 to be bent so that the multiple heat dissipation channels are arranged along the predetermined trajectory. This allows the overall shape of the heat sink 31 to be adaptively adjusted to the shape of the mounting surface, effectively covering the mounting surface and improving heat dissipation performance.

[0038] Furthermore, the heat sink 31 includes a plurality of heat sink portions 32, which are interconnected and constructed into a folding fan structure. That is, the plurality of heat sink portions 32 in the heat sink 31 are interconnected in a folding fan shape, which can cause two adjacent heat sink portions 32 to deform in directions of approaching or moving away from each other. For example, in the initial state, the plurality of heat sink portions 32 are arranged along a straight line, and the plurality of heat dissipation channels are also arranged along a straight line, so as to facilitate the production and manufacture of the heat sink 31. Subsequently, the heat sink 31 can be bent into an arc or a circular folding fan structure to adapt to the shape of the mounting surface, so as to effectively cover the mounting surface and provide more heat dissipation surfaces for heat dissipation, so that the heat sink 30 is easy to produce and has high heat dissipation performance.

[0039] See Figure 3-Figure 4 Furthermore, the multiple heat dissipation portions 32 in the heat sink 31 are arranged along a predetermined trajectory, and each heat dissipation portion 32 has a first heat dissipation channel 33 that communicates with the outside world. Each adjacent heat dissipation portion 32 is interconnected, and a second heat dissipation channel 34 that communicates with the outside world is defined between them. Furthermore, all heat dissipation portions 32 in the heat sink 30 are in contact with the cover plate 10, ensuring effective contact between the entire heat sink 30 and the cover plate 10. This increases the contact area between the heat sink 30 and the cover plate 10 and improves the heat dissipation effect. Furthermore, each heat dissipation portion 32 in the heat sink 31 has a first heat dissipation channel 33, and a second heat dissipation channel 34 is formed between adjacent heat dissipation portions 32. This creates multiple heat dissipation channels within the heat sink 31, increasing the heat dissipation area. When air is forced through the heat sink 31 by convection, the multiple first and second heat dissipation channels 33 and 34 allow air to flow smoothly through the heat sink 31, reducing wind resistance along the airflow path and allowing air to quickly remove heat from the heat sink 31, further improving heat dissipation performance.

[0040] Equivalently, the heat dissipation channel includes a first heat dissipation channel 33 formed by the heat dissipation portion 32 itself, and a second heat dissipation channel 34 defined between two adjacent heat dissipation portions 32, and the heat dissipation exposure includes a first heat dissipation exposure of the first heat dissipation channel 33 and a second heat dissipation channel 34 of the second heat dissipation channel 34, that is, each first heat dissipation channel 33 has a first heat dissipation exposure, and each second heat dissipation channel 34 has a second heat dissipation exposure, and the adjacent first heat dissipation exposures and second heat dissipation exposures are oriented in opposite directions to form a folding fan-shaped heat dissipation body 31.

[0041] See Figure 8 In some embodiments, the cooking appliance further includes a fan 200, which is mounted on either the cover 100 or the pot body. The fan 200 is configured to drive airflow through the heat sink 31 and then through the first and second heat dissipation channels 33, 34 within the heat sink 31. Specifically, the fan 200 operates to achieve forced convection, forcing airflow through the heat sink 30 and then out to the outside world, thereby removing heat from the heat sink 30.

[0042] See Figure 3-Figure 4 In some embodiments, the predetermined trajectory along which the multiple heat dissipating portions 32 of the heat sink 31 are arranged is a portion or the entirety of a virtual circle, and the heat dissipating portions 32, the first heat dissipating channels 33, and the second heat dissipating channels 34 all extend radially along the virtual circle. When the multiple heat dissipating portions 32 of the heat sink 31 are arranged along a portion of a virtual circle, this is equivalent to the multiple heat dissipating portions 32 being arranged along an arc, resulting in the heat sink 31 having an overall circular annular shape. For example, the heat sink 31 may be a C-shaped ring or a semicircular ring, and the heat dissipating portions 32, the first heat dissipating channels 33, and the second heat dissipating channels 34 of the heat sink 31 extend radially along the arc ring. When the multiple heat dissipating portions 32 of the heat sink 31 are arranged along the entirety of a virtual circle, this is equivalent to the multiple heat dissipating portions 32 being arranged along a circle, resulting in the heat sink 31 having an overall circular annular shape, and the heat dissipating portions 32, the first heat dissipating channels 33, and the second heat dissipating channels 34 of the heat sink 31 all extend radially along the ring. In this way, during heat dissipation, the airflow flows along the radial direction of the virtual circle through the first heat dissipation channel 33 and the second heat dissipation channel 34 in the heat dissipation body 31 .

[0043] Furthermore, the overall shape of the heat sink 31 is a circular ring or a semicircular ring, which can match the shape of the cover 10 and enable the heat sink 31 to cover as much of the surface of the cover 10 as possible, thereby increasing the contact area between the heat sink 31 and the cover 10 and further improving the heat dissipation effect.

[0044] Optionally, the heat sink 31 is made of gold, silver, copper, aluminum, zinc, magnesium, or other materials, which have high heat transfer and thermal conductivity coefficients and high heat exchange efficiency. Furthermore, considering comprehensive performance, the heat sink 31 is made of aluminum or copper, which has good heat transfer and thermal conductivity coefficients and is relatively low in cost.

[0045] In this embodiment, the heat sink 31 is an M-shaped fin. Specifically, each heat sink 32 in the heat sink 31 includes two oppositely disposed heat sinks 321 and a first connecting portion 323. The first connecting portion 323 connects between the two heat sinks 321 on the same side and, together with the two heat sinks 321, forms a first heat dissipation channel 33. The surface of the first connecting portion 323 facing away from the first heat dissipation channel 33 is configured to form a first contact surface. The first connecting portion 323 on each heat sink 32 can directly contact the cover plate 10 via the first contact surface, thereby ensuring that each heat sink 32 effectively contacts the cover plate 10 for heat conduction.

[0046] Furthermore, the heat sink 31 includes a second connecting portion 40, which connects between the same side of two adjacent heat sinks 32 and, together with the two adjacent heat sinks 32, forms a second heat dissipation channel 34. The surface of the second connecting portion 40 facing away from the second heat dissipation channel 34 is configured to form a second contact surface. Thus, the second connecting portion 40 connects the two adjacent heat sinks 32, and the second contact surface of the second connecting portion 40 effectively contacts the cover plate 10, simultaneously forming two first heat dissipation channels 33 and one second heat dissipation channel 34. This allows for a greater number of heat dissipation channels to be formed, thereby improving heat dissipation efficiency.

[0047] Specifically, the second connecting portion 40 is connected to the same side of two adjacent heat sinks 321 in adjacent heat sinks 32, and is also connected to the same side of two adjacent heat sinks 321 in two adjacent heat sinks 32. The two adjacent heat sinks 321 and the second connecting portion 40 together enclose a second heat dissipation channel 34. Thus, the cross-sectional shape of the two adjacent heat sinks 32 after connection is formed into an M-shape. This M-shaped fin structure allows for more heat sinks 321 within the limited height space of the cooking appliance cover 100, thereby improving heat dissipation efficiency. Furthermore, the first heat dissipation opening is opposite the first connecting portion 323, and the second heat dissipation opening is opposite the second connecting portion 40. The first connecting portion 323 and the second connecting portion 40 are located on opposite sides of the heat sink 321, respectively, so that the first and second heat dissipation openings face opposite directions.

[0048] It can be understood that in some other embodiments, the two heat sinks 321 in the heat dissipation part 32 are directly connected, and the first connection part 323 is not provided; the two adjacent heat dissipation parts 32 are directly connected, and the second connection part 40 is not provided. The first connection part 323 and the second connection part 40 can be provided as required and are not limited here.

[0049] See Figure 3 and Figure 7In some embodiments, the heat sink 31 is constructed by bending a plurality of heat sink portions 32 arranged in a straight line along a predetermined path. This means that, in the initial state, the heat sink 31 has the plurality of heat sink portions 32 arranged along a straight path, resulting in a straight bar shape, which facilitates manufacturing. Subsequently, the plurality of heat sink portions 32 in the heat sink 31 can be bent into a predetermined path, such as a circular or arc-shaped path, to obtain a ring-shaped or C-shaped heat sink 31. This makes the entire manufacturing process relatively simple and convenient.

[0050] At the same time, in the process of bending the arrangement trajectory, the straight air flow channel in the heat sink 31 will be deformed, so that the width of the first heat dissipation channel 33 and the second heat dissipation channel 34 in the finally formed heat sink 31 gradually decreases from the outside to the inside in the radial direction, and the multiple heat dissipation fins 321 forming the first heat dissipation channel 33 and the second heat dissipation channel 34 in the heat sink 31 are sparse on the outside and loose on the inside.

[0051] See Figure 3 and Figure 7 In some embodiments, among the multiple heat dissipation parts 32 of the heat dissipation body 31, at least some of the heat dissipation parts 32 are provided with spoiler holes 35 connected between the first heat dissipation channel 33 and the second heat dissipation channel 34, so that the airflow is disturbed in the first heat dissipation channel 33 and the second heat dissipation channel 34 through the spoiler holes 35, thereby further improving the heat dissipation efficiency.

[0052] See Figure 5-Figure 6 In some embodiments, there are multiple heat sinks 31, and the multiple heat sinks 31 are nested in a direction intersecting the direction of the predetermined trajectory. The first heat dissipation channel 33 of one adjacent heat sink 31 communicates with the first heat dissipation channel 33 and / or the second heat dissipation channel 34 of the other, and the second heat dissipation channel 34 of one adjacent heat sink 31 communicates with the first heat dissipation channel 33 and / or the second heat dissipation channel 34 of the other. This is equivalent to providing multiple heat sinks 31 in the heat sink 30, and the multiple heat sinks 30 are nested in one another, for example, two annular heat sinks 30 nested in one another, or two semicircular heat sinks 30 nested in one another. This reduces the sparse outer and dense inner arrangement of the heat sink 321 in each heat sink 30, allowing for a larger distribution of heat sink 321 in the middle heat sink 30, increasing the heat dissipation area and improving the heat dissipation effect. Furthermore, the heat dissipation channels in two adjacent heat sinks 31 are connected, allowing for normal airflow.

[0053] It is understandable that in some other embodiments, the number of the heat sink 31 in the heat sink 30 may also be one, which is not limited here.

[0054] See Figure 1-Figure 2, in some embodiments, the cooking appliance lid 100 further includes a housing 50. The housing 50 is sleeved on the side of the heat dissipation member 30 facing away from the cover plate 10 and is connected to the cover plate 10 to protect the heat dissipation member 30 by sleeving the housing 50. At the same time, an air inlet 52 and an air outlet 54 are formed on the housing 50. The air inlet 52 is located at the same end of all the first heat dissipation channels 33 and all the second heat dissipation channels 34, and the air outlet 54 is located at the same other end of all the first heat dissipation channels 33 and all the second heat dissipation channels 34. Both the air inlet 52 and the air outlet 54 are connected to all the first heat dissipation channels 33 and all the second heat dissipation channels 34. Thus, the air inlet 52 and the air outlet 54 are formed on the housing 50 to allow air to flow through the housing 50 and then flow in the heat dissipation member 30.

[0055] Optionally, the cooking appliance further includes a blower duct 210. The fan 200 is provided on the cooking pot body. The blower duct 210 is connected between the heat dissipation member 100 and the fan 200. Specifically, the blower duct 210 is connected between the air inlet 52 of the housing 50 and the air outlet of the fan 200, and air can be blown into the interior of the housing 50 through the blower duct 210 to enable the heat dissipation body 31 to perform convective heat dissipation. Equivalently, the fan 200 is provided on the cooking pot body, the heat dissipation member 30 is provided on the cooking appliance lid 100, and the blower duct 210 is connected between the fan 200 and the heat dissipation member 30 to blow air. Moreover, the blower duct 210 is configured as a flexible member to allow the cooking appliance lid 100 to open and close relative to the cooking pot body. For example, when the cooking appliance lid 100 is opened relative to the cooking pot body, the blower duct 210 adaptively bends and deforms to allow the cooking appliance lid 100 to rotate relative to the cooking pot body to open. Similarly, when the cooking appliance lid 100 is closed relative to the cooking pot body, the blower duct 210 adaptively bends and deforms to allow the cooking appliance lid 100 to rotate relative to the cooking pot body to close. In this way, the fan 200 does not need to be provided on the cooking appliance lid 100, and air can still be blown to the heat dissipation member 30, thereby saving the installation space of the cooking appliance lid 100.

[0056] Refer to Figure 3-Figure 4 , in the cooking appliance lid 100, the area of the cover plate 10 is effective. Specifically, how to arrange the size of the heat dissipation body 31 in the effective area is the key to further improving the heat dissipation efficiency. Specifically, along the direction perpendicular to the preset trajectory, that is, in the direction perpendicular to the cover plate 10, the height of the heat dissipation portion 32 is H, and the value range of H is: 0mm < H < 55mm. When the height of the heat dissipation portion 32 is within this range, the heat dissipation efficiency is relatively good.

[0057] Furthermore, the aforementioned preset trajectory represents a portion or all of a virtual circle. Specifically, the multiple heat dissipating portions 32 within the heat sink 31 are arranged along a portion or all of a virtual circle, resulting in a circular or arcuate ring shape for the heat sink 31. This ensures that the shape of the heat sink 31 matches the shape of the cover 10, thereby increasing the coverage area of ​​the heat sink 31 on the cover 10. Furthermore, the heat dissipating portions 32, the first heat dissipating channels 33, and the second heat dissipating channels 34 all extend radially along the virtual circle. The height of the heat dissipating portions 32 perpendicular to the cover 10 is H, the length of the heat dissipating portions 32 along their extension direction is F, the number of heat dissipating portions 32 is N, and the outer diameter of the heat sink 31 is R, where F*N*H / R ≤ 3630 mm. In the process of designing the heat sink 30, the setting range of the number N of the heat sink 321 can be calculated based on the length F, height H and radius R of the virtual circle of the heat sink 321, so that the heat dissipation capacity and fin material cost of the heat dissipation system are in the positive slope zone, saving materials and reducing costs. At the same time, a heat sink 30 with better heat dissipation performance can be designed within the effective area and effective height space of the cover plate 10, thereby maximizing the heat dissipation efficiency.

[0058] Specifically, each heat dissipation portion 32 includes two heat dissipation fins 321 arranged opposite to each other, and a first heat dissipation channel 33 is formed between the two heat dissipation fins 321. The included angle between the two heat dissipation fins 321 in the heat dissipation portion 32 is α. For example, when the heat dissipation body 31 goes around one circle, the number of heat dissipation portions 32 in the heat dissipation body 31 is N=360 / α.

[0059] The derivation process of the above design conditions is introduced below.

[0060] Specifically, in this embodiment, the M-shaped fins are formed using aluminum strips of a certain thickness, which are formed in a fin forming machine and then wound to form an O-shaped or C-shaped heat sink 31. Finally, during assembly, the fins (heat sink 32) are tightly attached to the cover 10 of the cooking appliance lid 100. The fins have a height H after forming, a length F, and a thickness δ. After secondary bending, the uniformly distributed wave angle α (the angle between the two heat sinks 321 in the heat sink 32 is α) is uniform. For example, after one full turn, the number of fin waves is N = 360 / α, and the fins form a circular or arc-shaped outer diameter R.

[0061] When the cover plate 10 has a limited area, the above structural size design affects the heat dissipation efficiency. Through mathematical model analysis and boundary conditions, the following calculation formula is formed:

[0062] Ka=η*Aa;Aa=4*H*Fd*N

[0063] in:

[0064] Ka—total heat transfer coefficient

[0065] η—variable

[0066] Aa—total heat exchange area

[0067] H—Fin height

[0068] F—fin length, R>F

[0069] N—Number of fin wave patterns

[0070] The total heat transfer coefficient (Ka) is defined as follows: a larger Ka indicates a higher system heat dissipation efficiency, while a smaller Ka indicates a lower surface heat dissipation efficiency. This coefficient is related to the total heat transfer area (Aa) and the variable η. A higher fin height (H), a larger fin length (F), and a greater number of fin patterns (N) per fin cycle increase the total heat transfer area (Aa). However, η follows a high-order curve relationship.

[0071] For example, if the number of fins N is too large, while the air and heat dissipation area increases, the fin spacing is too small, affecting air flow and increasing air resistance, which is detrimental to heat dissipation efficiency. The variable η in the above formula is small, and the heat transfer coefficient Ka is low. If N is too small, air circulation is facilitated, but the reduced N reduces the heat transfer area Aa in contact with the air. Although the variable η in the above formula is large, the heat transfer coefficient Ka is also low. Therefore, if other conditions remain unchanged, there is an optimal range of values ​​for N to ensure optimal heat exchange capacity and achieve the maximum heat transfer coefficient Ka. Similarly, if other conditions remain unchanged, there is also an optimal range of fin heights H to ensure optimal heat exchange capacity.

[0072] Therefore, how to design an excellent heat sink requires further introduction of the following calculation formula:

[0073] F(Vc,AC,Ka,Ta)=ρ*Vc*AC*Ka*Ta*C P *(Tout-Tin), F(V C ,A C ,K a , T a ) represents the heat dissipation capacity, which is affected by Vc, AC, Ka, and Ta, and is proportional to (Tout-Tin).

[0074] in:

[0075] ρ—air density

[0076] Vc—Effective cooling wind speed

[0077] AC—Minimum circulation area

[0078] C P —Air at the appropriate temperature has specific heat

[0079] Ta—Heat transfer material thickness influence coefficient

[0080] Tout - Temperature of the air outlet 54

[0081] Tin - Temperature of the air outlet 54

[0082] In addition, as Figure 9 shown, under the condition that other conditions remain unchanged, there is also a certain curve relationship between the heat dissipation capacity and the fin height.

[0083] Thus, through the above design of the calculation formula and simulation calculation, it is found that when other conditions remain unchanged, after the fin height H is greater than 45m, the heat dissipation efficiency shows a downward trend. Moreover, multiple parameters will affect the heat dissipation efficiency. Through the above formula, variable changes and genetic algorithm optimization, it is found that when the value range of the height H (fin height) of the heat dissipation part 32 is 0mm < H < 55mm, the heat dissipation efficiency is optimal.

[0084] In addition, when F * N * H / R ≤ 3630mm, the heat dissipation capacity of the system is in the positive slope area of the system, which can save materials and reduce costs, and maximize the heat dissipation efficiency. Moreover, if Fd * N * H / R > 3630mm, although a certain required value of heat dissipation capacity can be achieved, the material cost and space cost paid are not proportional to the heat dissipation efficiency obtained, and even show an inverse ratio result.

[0085] In an embodiment of the present invention, there is also provided a cooking utensil lid 100 as described above. The cooking utensil lid 100 includes a cover plate 10 and a heat dissipation member 30, and the heat dissipation member 30 is provided on the cover plate 10. When the cooking utensil is working, the cover plate 10 faces the cooking space inside the pot body, and the heat in the cooking space will be transferred to the cover plate 10, and the heat dissipation member 30 contacts the cover plate 10 to take away the heat on the cover plate 10, thereby quickly cooling the cooking space to achieve the effect of rapid pressure relief.

[0086] In an embodiment of the present invention, there is also provided a heat dissipation member 30 as described above. The heat dissipation member 30 includes a heat dissipation body 31, and the heat dissipation body 31 has a plurality of heat dissipation channels all communicating with the outside. Each heat dissipation channel is configured to have a heat dissipation opening, and the heat dissipation openings of every two adjacent heat dissipation channels face in opposite directions; wherein, the heat dissipation body 31 is configured to be able to deform along a preset trajectory so that the plurality of heat dissipation channels are arranged along the preset trajectory. Equivalently, a plurality of heat dissipation channels are formed on the heat dissipation body 31, and the heat dissipation openings of two adjacent heat dissipation channels face in opposite directions, so as to allow the heat dissipation body 31 to deform in the direction of the arrangement of the plurality of heat dissipation channels. In this way, the heat dissipation body 31 can be bent so that the plurality of heat dissipation channels are arranged along the preset trajectory, and the overall shape of the heat dissipation body 31 can be adaptively adjusted according to the shape of the installation surface, and the heat dissipation body 31 can effectively cover the installation surface and thus improve the heat dissipation performance.

[0087] In one embodiment of the present invention, a heat sink 30 is also provided. The heat sink 31 includes a plurality of heat sink portions 32. The plurality of heat sink portions 32 in the heat sink 31 are arranged along a predetermined trajectory, and each heat sink portion 32 has a first heat sink channel 33 that communicates with the outside world. Each adjacent heat sink portion 32 is interconnected, and a second heat sink channel 34 that communicates with the outside world is defined between the two adjacent heat sink portions 32. When the heat sink 30 is assembled on the cover plate 10, all heat sink portions 32 in the heat sink 30 are in contact with the cover plate 10, so that the heat sink 30 as a whole is in effective contact with the cover plate 10, increasing the contact area between the heat sink 30 and the cover plate 10 and improving the heat dissipation effect. In addition, each heat dissipation portion 32 in the heat dissipation body 31 has a first heat dissipation channel 33, and a second heat dissipation channel 34 is formed between two adjacent heat dissipation portions 32. In this way, the heat dissipation body 31 has multiple heat dissipation channels, which increases the heat dissipation area. When forced convection air flows into the heat dissipation body 31, the multiple heat dissipation channels allow the airflow to flow smoothly through the heat dissipation body 31, reducing the wind resistance on the airflow path, allowing the airflow to quickly remove the heat from the heat dissipation body 31, and further improving the heat dissipation performance.

[0088] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A heat sink, characterized in that: The heat dissipation member includes a heat dissipation body (31), the heat dissipation body (31) includes a plurality of heat dissipation portions (32), the plurality of heat dissipation portions (32) in the heat dissipation body (31) are arranged along a preset trajectory, and each heat dissipation portion (32) itself has a first heat dissipation channel (33) communicating with the outside; every two adjacent heat dissipation portions (32) are connected to each other, and a second heat dissipation channel (34) communicating with the outside is defined therebetween; wherein, the preset trajectory is part or all of a virtual circle, and the heat dissipation portion (32) extends along the radial direction of the virtual circle; along the direction perpendicular to the preset trajectory, the value range of the height H of the heat dissipation portion (32) is: 0mm < H < 55mm; the length of the heat dissipation portion (32) along its own extension direction is F, the unit is mm, the number of the heat dissipation portions (32) is N, the outer diameter of the heat dissipation portion (32) is R, the unit is mm, and F * N * H / R ≤ 3630mm.

2. The heat sink according to claim 1, wherein: Both the first heat dissipation channel (33) and the second heat dissipation channel (34) extend along the radial direction of the virtual circle.

3. The heat sink according to claim 1, wherein: Each heat dissipation portion (32) includes two oppositely arranged heat dissipation fins (321) and a first connecting portion (323), and the first connecting portion (323) is connected between the same sides of the two heat dissipation fins (321) and together with the two heat dissipation fins (321) encloses the first heat dissipation channel (33).

4. The heat sink according to claim 1, wherein: The heat dissipation body (31) further includes a second connecting portion (40), and the second connecting portion (40) is connected between the same sides of two adjacent heat dissipation portions (32) and together with two adjacent second connecting portions (40) encloses the second heat dissipation channel (34).

5. The heat sink according to any one of claims 2 to 4, characterized in that: The heat dissipation body (31) is configured to be formed by bending a plurality of the heat dissipation portions (32) arranged in a straight line along the preset trajectory.

6. The heat sink according to any one of claims 1 to 4, characterized in that: The number of the heat dissipation bodies (31) is multiple, and the multiple heat dissipation bodies (31) are sleeved with each other along the direction intersecting with the direction where the preset trajectory is located, and the first heat dissipation channel (33) of one of two adjacent heat dissipation bodies (31) is communicated with the first heat dissipation channel (33) and / or the second heat dissipation channel (34) of the other, and the second heat dissipation channel (34) of one of two adjacent heat dissipation bodies (31) is communicated with the first heat dissipation channel (33) and / or the second heat dissipation channel (34) of the other.

7. A cooking utensil cover, characterized in that: The cooking appliance cover body includes a cover plate (10) and the heat dissipation member according to any one of claims 1-6 above, and the heat dissipation member is provided on the cover plate (10).

8. The cooking utensil cover according to claim 7, wherein: The cooking utensil cover further comprises a shell (50), the shell (50) being sleeved on a side of the heat dissipating element facing away from the cover and connected to the cover, and the shell (50) being provided with an air inlet (52) and an air outlet (54), the air inlet (52) being located at the same end of all the first heat dissipating channels (33) and all the second heat dissipating channels (34), the air outlet (54) being located at the other end of all the first heat dissipating channels (33) and all the second heat dissipating channels (34), and both the air inlet (52) and the air outlet (54) being in communication with all the first heat dissipating channels (33) and all the second heat dissipating channels (34).

9. A cooking utensil, characterized in that: The invention comprises a pot body, a fan (200) and a cooking utensil cover body as claimed in claim 7 or 8, wherein the cooking utensil cover body can be opened and closed relative to the pot body, and the fan (200) is provided on either the cooking utensil cover body or the pot body and is used to drive air flow through the heat sink (31).

10. The cooking appliance according to claim 9, characterized in that The cooking appliance further comprises an air supply duct (210), the fan (200) is arranged on the pot body, the air supply duct (210) is connected between the heat sink and the fan (200), and the air supply duct (210) is constructed as a flexible member.

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