Heat dissipation device and lampblack treatment equipment

Abstract

The utility model discloses a heat dissipation device and oil smoke treatment equipment, and belongs to the field of household appliances. The heat dissipation device comprises a mounting plate, a heat dissipation assembly and a driving part, the heat dissipation assembly comprises a fixed fin and a movable fin, the fixed fin is arranged on the mounting plate and is fixed relative to the mounting plate, the movable fin is arranged on the mounting plate and can move relative to the mounting plate, and the movable fin has a closed state and an unfolded state relative to the fixed fin; from the closed state to the unfolded state, the heat dissipation area of the heat dissipation assembly is gradually increased; one end of the driving part is connected with the mounting plate, the other end of the driving part is connected with the movable fin, the driving part is made of shape memory alloy, and the driving part deforms along a first direction along with temperature change to drive the movable fin to move along the first direction so as to be switched between a closed state and an unfolded state. According to the heat dissipation device, the movable fins can be automatically adjusted to be unfolded and folded according to temperature changes, so that the heat dissipation area is automatically adjusted, the heat dissipation effect is enhanced, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a heat dissipation device and an oil fume treatment equipment. Background Technology

[0002] Range hoods are kitchen appliances used to purify the kitchen environment. With the increasing functionality of smart home products, the number and types of electronic components within their appliance boxes are also increasing. In recent years, electronic components have gradually moved towards integration, high power density, and miniaturization, resulting in higher power dissipation per unit area and continuously increasing surface heat flux density, thus making the heating situation within the appliance box more complex.

[0003] Existing range hood cooling systems typically use finned heat sinks or fans for heat dissipation. However, the shape and size of the fins in conventional finned heat sinks cannot be changed after assembly; that is, the size, number of fins, and fin spacing of the heat sink are all fixed, and its heat dissipation performance is also fixed. Therefore, the heat dissipation performance of the heat sink cannot be adjusted according to the heat generated by the appliance. Consequently, this type of cooling system struggles to meet the cooling needs of range hoods under different operating conditions and loads. For example, if the heat generated by electronic components decreases while the cooling system maintains high-energy-consumption cooling, it leads to energy waste. Conversely, if the heat generated by electronic components increases while the cooling system maintains low-energy-consumption cooling, it results in insufficient cooling efficiency, leading to overheating or even failure of the electronic components.

[0004] Therefore, there is an urgent need to design a heat dissipation device and an oil fume treatment equipment to solve the above-mentioned technical problems. Utility Model Content

[0005] One objective of this invention is to provide a heat dissipation device that can automatically adjust the size of the heat dissipation area according to temperature changes, thereby adapting to different heat load conditions.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A heat dissipation device, comprising:

[0008] Mounting plate;

[0009] A heat dissipation assembly includes fixed fins and movable fins. The fixed fins are mounted on a mounting plate and are fixed relative to the mounting plate. The movable fins are mounted on the mounting plate and are movable relative to the mounting plate. The movable fins have a closed state and an extended state relative to the fixed fins. From the closed state to the extended state, the heat dissipation area of ​​the heat dissipation assembly gradually increases; and...

[0010] The drive unit is connected to the mounting plate at one end and to the movable fin at the other end. The drive unit is made of shape memory alloy. The drive unit deforms along the first direction as the temperature changes, driving the movable fin to move along the first direction to switch between a closed state and an open state.

[0011] As an optional technical solution for the above-mentioned heat dissipation device, the heat dissipation device also includes:

[0012] The movable plate, drive unit, and movable fins are all connected to the movable plate, which extends along the second direction, while the first direction and the second direction are perpendicular to each other.

[0013] As an optional technical solution for the above-mentioned heat dissipation device, the heat dissipation device also includes:

[0014] An elastic element extends along a first direction, with one end connected to a mounting plate and the other end connected to a movable plate.

[0015] As an optional technical solution for the above-mentioned heat dissipation device, the heat dissipation device also includes:

[0016] A fixed plate is fixedly connected to a mounting plate. The fixed plate extends along a second direction. The fixed plate and the movable plate are spaced apart and facing each other along a first direction. One end of the fixed fin, the drive part, and the elastic element are all connected to the fixed plate.

[0017] As an optional technical solution for the above-mentioned heat dissipation device, at least two sets of heat dissipation components are provided at intervals along the second direction, and the driving part is disposed in the gap between two adjacent heat dissipation components;

[0018] The number of drive units is less than the number of heat dissipation components.

[0019] As an optional technical solution for the above-mentioned heat dissipation device, two elastic elements are provided, one of which is located on the outermost side of the heat dissipation component at one end of the second direction, and the other elastic element is located on the outermost side of the heat dissipation component at the other end of the second direction.

[0020] As an optional technical solution for the above-mentioned heat dissipation device, when the movable fins are in the closed state, the drive part has an arched structure;

[0021] During the process of the movable fins switching from the closed state to the deployed state, the curvature of the drive unit gradually decreases;

[0022] When the movable fins are in the deployed state, the drive unit has a linear structure.

[0023] As an optional technical solution for the above-mentioned heat dissipation device, the movable fins are parallel to and fitted with the fixed fins;

[0024] Both the fixed fins and the movable fins are perpendicular to the mounting plate;

[0025] The fixed fin has the same height as the movable fin, the same width as the movable fin, and the same thickness as the movable fin.

[0026] As an optional technical solution for the above-mentioned heat dissipation device, the heat dissipation device also includes:

[0027] The heat sink is mounted on the surface of the mounting plate. Fixed fins are attached to the surface of the heat sink, and in the closed state, movable fins are attached to the surface of the heat sink.

[0028] Another objective of this invention is to provide an oil fume treatment device that has high heat dissipation efficiency and good heat dissipation effect.

[0029] To achieve this objective, the present invention adopts the following technical solution:

[0030] An oil fume treatment device includes the aforementioned heat dissipation device.

[0031] This utility model has at least the following beneficial effects:

[0032] The heat dissipation device disclosed in this utility model includes a mounting plate, a heat dissipation assembly, and a drive unit. The heat dissipation assembly includes fixed fins and movable fins. The fixed fins are disposed on the mounting plate and fixed relative to it, while the movable fins are disposed on the mounting plate and movable relative to it. The movable fins have a closed state and an extended state relative to the fixed fins. From the closed state to the extended state, the heat dissipation area of ​​the heat dissipation assembly gradually increases. One end of the drive unit is connected to the mounting plate, and the other end is connected to the movable fins. The drive unit is made of shape memory alloy and deforms along a first direction with temperature changes, driving the movable fins to move along the first direction to switch between the closed and extended states. Compared with traditional straight-fin heat sinks, this heat dissipation device utilizes the temperature-driven characteristics of shape memory alloys to automatically adjust the extension and closure of the movable fins according to temperature changes. This achieves the purpose of automatically adjusting the heat dissipation area of ​​the heat dissipation assembly under different temperature conditions, thereby enhancing the heat dissipation effect, improving heat dissipation efficiency, ensuring that the temperature of the heat source is maintained within a reasonable range, thus adapting to different heat load conditions and optimizing the overall performance of the fume treatment equipment.

[0033] The oil fume treatment equipment disclosed in this utility model includes the aforementioned heat dissipation device. This oil fume treatment equipment has high heat dissipation efficiency, good heat dissipation effect, and superior overall performance. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the heat dissipation device provided in a specific embodiment of the present invention when the movable fins are in a closed state;

[0036] Figure 2 This is a schematic diagram of the structure of the heat dissipation device provided in a specific embodiment of the present invention when the movable fins are in the deployed state;

[0037] Figure 3 This is a schematic diagram of the drive unit when the movable fins are in a closed state, according to a specific embodiment of this utility model.

[0038] Figure 4 This is a schematic diagram of the drive unit when the movable fins are in the deployed state, provided in a specific embodiment of this utility model.

[0039] Figure 5 This is a schematic diagram of the structure of the movable fins and movable plate provided in a specific embodiment of this utility model.

[0040] In the picture:

[0041] 1. Mounting plate; 2. Fixed fins; 3. Movable fins; 4. Drive unit; 5. Movable plate; 6. Elastic element; 7. Fixed plate; 8. Heat sink. Detailed Implementation

[0042] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 utility model.

[0044] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to 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.

[0046] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening 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 possible implementation.

[0048] This embodiment discloses an oil fume treatment device, which can be any type of device with oil fume treatment function, such as a top-mounted range hood, a side-suction range hood, or a top-suction range hood. All types of devices with oil fume treatment function are within the protection scope of this embodiment.

[0049] The circuit boards and other electronic components inside this fume treatment equipment generate a lot of heat during operation, therefore a heat dissipation device is required. This embodiment uses a heat dissipation device installed on the circuit board as an example for explanation.

[0050] like Figures 1 to 4 As shown, the heat dissipation device provided in this embodiment includes a mounting plate 1, a heat dissipation assembly, and a driving unit 4. The mounting plate 1 is abutted against a heat source, for example, a circuit board. The heat dissipation assembly includes fixed fins 2 and movable fins 3. The fixed fins 2 are mounted on the mounting plate 1 and fixed relative to it. The movable fins 3 are mounted on the mounting plate 1 and movable relative to it. The movable fins 3 have a closed state and an extended state relative to the fixed fins 2. From the closed state to the extended state, the heat dissipation area of ​​the heat dissipation assembly gradually increases; from the extended state to the closed state, the heat dissipation area gradually decreases. One end of the driving unit 4 is connected to the mounting plate 1, and the other end is connected to the movable fins 3. The driving unit 4 is made of shape memory alloy. The driving unit 4 deforms along a first direction with temperature changes, driving the movable fins 3 to move along the first direction to switch between the closed state and the extended state.

[0051] Shape memory alloys (SMA) are alloy materials that, when heated, completely eliminate the deformation that occurred at lower temperatures, restoring their original shape before deformation—in other words, alloys possessing a "memory" effect. There are many successful examples of their application in the aerospace field. The massive antennas on artificial satellites can be made of shape memory alloys. Before launching a satellite, the parabolic antenna is folded and installed inside the satellite. After the rocket lifts off and places the satellite into its designated orbit, simply heating is sufficient; the folded antenna, due to its "memory" function, naturally unfolds and restores its parabolic shape.

[0052] Compared with traditional straight-fin heat sinks, the heat dissipation device in this embodiment utilizes the temperature-driven characteristics of shape memory alloys. It can automatically adjust the heat dissipation area of ​​the heat dissipation component according to the heat changes generated by the circuit board during the operation of the fume treatment equipment. This enhances the heat dissipation effect, improves the heat dissipation efficiency, and ensures that the circuit board temperature is maintained within a reasonable range. This allows it to adapt to different thermal load conditions and optimize the overall performance of the fume treatment equipment.

[0053] To better drive the movement of the movable fins 3, the heat dissipation device also includes a movable plate 5. Both the drive unit 4 and the movable fins 3 are connected to the movable plate 5. The movable plate 5 extends along a second direction, with the first direction perpendicular to the second direction. The drive unit 4 drives the movable fins 3 to move along the first direction via the movable plate 5. The movable plate 5 serves as a transmission component between the drive unit 4 and the movable fins 3, increasing both the stability of the drive unit 4 in driving the movable fins 3 and the overall stability and reliability of the structure. It should be noted that... Figure 1 In the diagram, direction ab is the first direction, and direction cd is the second direction.

[0054] Optionally, the heat dissipation device also includes an elastic element 6, which extends along a first direction. One end of the elastic element 6 is connected to the mounting plate 1, and the other end is connected to the movable plate 5. The elastic element 6 plays a stabilizing and resetting role during the movement of the movable fins 3. Specifically, when the temperature rises, the drive unit 4 senses the temperature and deforms along the first direction, pushing the movable plate 5 to move. The movable plate 5 causes the movable fins 3 to gradually unfold. During this process, the elastic element 6 is stretched, ensuring that the movable fins 3 can stably unfold under predetermined temperature conditions. When the temperature decreases, the force provided by the drive unit 4 gradually decreases, and the movable fins 3 gradually close under the restoring force of the elastic element 6. Through the synergistic effect of the elastic element 6 and the shape memory alloy, the opening and closing state of the movable fins 3 can be automatically adjusted within a certain temperature range to maintain an ideal heat dissipation balance, thereby effectively preventing the circuit board from being affected by overheating or overcooling, thus extending its performance and lifespan.

[0055] Based on the above structure, the heat dissipation device also includes a fixing plate 7, which is fixedly connected to the mounting plate 1. The fixing plate 7 extends along a second direction, and the fixing plate 7 and the movable plate 5 are spaced apart and facing each other along a first direction. One end of the fixing fin 2, the driving part 4, and the elastic member 6 are all connected to the fixing plate 7. By setting the fixing plate 7 on the mounting plate 1 as a structural support, it is beneficial to install the fixing fin 2 and deform the driving part 4 and the elastic member 6. For the fixing fin 2, if the fixing fin 2 is directly fixed to the mounting plate 1, the fixing area between the two is large, and the processing difficulty is high. For the driving part 4, since the fixing plate 7 and the movable plate 5 are facing each other, one end of the driving part 4 is connected to the fixing plate 7, and the other end is connected to the movable plate 5. The extension direction of the driving part 4 is consistent with the deformation direction. For the elastic member 6, since the fixing plate 7 and the movable plate 5 are facing each other, one end of the elastic member 6 is connected to the fixing plate 7, and the other end is connected to the movable plate 5. The axial direction of the elastic member 6 is completely coincident with the elastic deformation direction.

[0056] In this embodiment, at least two sets of heat dissipation components are spaced apart along the second direction, and the drive unit 4 is disposed in the gap between two adjacent heat dissipation components. By providing at least two sets of heat dissipation components, the heat dissipation area is increased, thereby enhancing the heat dissipation effect. The drive unit 4 is disposed between two adjacent heat dissipation components, which can apply force to the movable plate 5 more evenly, thereby pushing the movable plate 5 to move more evenly, and making the deployment of the movable fins 3 more uniform and stable.

[0057] Based on the above structure, the number of drive units 4 is less than the number of heat dissipation components. The specific number of heat dissipation components and drive units 4 can be designed according to actual needs. To ensure the heat dissipation effect of the heat dissipation device, it is best to arrange as many heat dissipation components as possible, where space permits. One drive unit 4 can be set for every two adjacent heat dissipation components, or drive units 4 can be set only between several pairs of heat dissipation components, as long as the drive units 4 can stably push the movable fins 3. In this embodiment, there are fourteen groups of heat dissipation components and three drive units 4, and the three drive units 4 are all located in the middle position of all heat dissipation components, that is, along the second direction, the drive units 4 are distributed in the middle area of ​​the fixed plate 7 and the movable plate 5. Taking this embodiment as an example, along the second direction from one end to the other, the first drive unit 4 is set between the sixth and seventh groups of heat dissipation components, the second drive unit 4 is set between the seventh and eighth groups of heat dissipation components, and the third drive unit 4 is set between the eighth and ninth groups of heat dissipation components. Under this structure, the thrust of the drive units 4 on the movable plate 5 and the movable fins 3 is more concentrated, which can improve the deployment efficiency of the movable fins 3. Of course, the arrangement of the three drive units 4 is not limited to the above-described manner; they can also be arranged separately. For example, along the second direction from one end to the other, the first drive unit 4 is positioned between the first and second groups of heat dissipation components, the second drive unit 4 is positioned between the seventh and eighth groups of heat dissipation components, and the third drive unit 4 is positioned between the thirteenth and fourteenth groups of heat dissipation components. Regardless of the number of drive units 4 and heat dissipation components, as long as the thrust applied by the drive units 4 to the movable plate 5 and the movable fins 3 is stable and effective, it is acceptable.

[0058] In this embodiment, such as Figure 1 and Figure 2 As shown, there are two elastic elements 6, which are respectively disposed on the outer sides of the two outermost heat dissipation components along the second direction. That is, one elastic element 6 is disposed on the outer side of the outermost heat dissipation component at one end of the second direction, and the other elastic element 6 is disposed on the outer side of the outermost heat dissipation component at the other end of the second direction. Compared with one elastic element 6, the force applied to the movable plate 5 by the two elastic elements 6 is more uniform and stable, which can prevent the movable plate 5 from tilting during movement.

[0059] In this embodiment, both the fixed plate 7 and the movable plate 5 are narrow strip plates, meaning their length is much greater than their width and thickness. Both are perpendicularly connected to the mounting plate 1, i.e., both the fixed plate 7 and the movable plate 5 are in an upright position. The length direction of the plates is the second direction, the thickness direction is the first direction, and the width direction is the height direction. The surfaces with the largest areas, i.e., the vertical surfaces, are directly opposite each other. In this structure, one end of the movable fin 3 along the first direction is fixedly connected to the vertical surface of the movable plate 5; one end of the fixed fin 2 along the first direction is fixedly connected to the vertical surface of the fixed plate 7; one end of the elastic element 6 is fixedly connected to the vertical surface of the fixed plate 7, and the other end of the elastic element 6 is fixedly connected to the vertical surface of the movable plate 5; one end of the driving part 4 is fixedly connected to the vertical surface of the fixed plate 7, and the other end of the driving part 4 is fixedly connected to the vertical surface of the movable plate 5.

[0060] Optionally, such as Figure 5 As shown, the movable fin 3 is fixedly connected to the movable plate 5 by welding or integral molding, and the two are assembled as a whole; the fixed fin 2 is connected to the fixed plate 7 by welding or integral molding; the elastic element 6 is fixedly connected between the fixed plate 7 and the movable plate 5 by welding or bonding to ensure the stable movement of the movable fin 3; the driving part 4 is connected between the fixed plate 7 and the movable plate 5 by bonding or welding, and drives the movable plate 5 and the movable fin 3 to move by changing its shape.

[0061] In this embodiment, to fit the overall structure, the drive unit 4 is a strip-shaped structure, which has both curved and straight forms. The strip-shaped structure facilitates assembly between the two heat dissipation components. Specifically, as shown... Figure 3 As shown, when the movable fin 3 is in the closed state, the drive unit 4 has an arched structure; during the process of the movable fin 3 switching from the closed state to the unfolded state, the curvature of the drive unit 4 gradually decreases; as Figure 4 As shown, when the movable fins 3 are in the deployed state, the drive unit 4 has a linear structure. This structure fully utilizes the temperature-sensitive deformation characteristics of shape memory alloys, automatically adjusting the deployed area of ​​the movable fins 3 according to different temperature changes, thereby adjusting the heat dissipation area of ​​the heat dissipation component, improving heat dissipation efficiency, ensuring optimal heat dissipation under different operating conditions, and optimizing the overall performance of the fume treatment equipment. Of course, the drive unit 4 is not limited to a strip structure; it can also be a sheet structure or other structures capable of deformation along the first direction. These embodiments will not be listed individually.

[0062] In this embodiment, the movable fin 3 and the fixed fin 2 are arranged parallel and closely fitted. This structural arrangement allows the heat dissipation assembly to be compact and small when the movable fin 3 is in the closed state, which is beneficial for use in limited spaces. At the same time, the fixed fin 2 can also provide some guiding and support for the movement of the movable fin 3, preventing the movable fin 3 from shaking or tilting during movement. When the movable fin 3 is in the closed state, its unfolded area is at its minimum. As the movable fin 3 moves from the closed state to the unfolded state, the movable fin 3 and the fixed fin 2 gradually offset each other, and the unfolded area of ​​the movable fin 3 gradually increases until the unfolded state, where the offset area between the two reaches its maximum, and the combined surface area of ​​the two also reaches its maximum, that is, the heat dissipation area of ​​the heat dissipation assembly is at its maximum. Conversely, as the movable fin 3 moves from the unfolded state to the closed state, the movable fin 3 and the fixed fin 2 gradually overlap, and the unfolded area of ​​the movable fin 3 gradually decreases until the closed state, where the offset area between the two reaches its minimum, and the combined surface area of ​​the two also reaches its minimum, that is, the heat dissipation area of ​​the heat dissipation assembly is at its minimum.

[0063] Furthermore, both the fixed fin 2 and the movable fin 3 are perpendicular to the mounting plate 1, which not only facilitates installation but also provides a larger heat dissipation area compared to an inclined arrangement. Of course, in other embodiments, the fixed fin 2 and the movable fin 3 can also be inclined on the mounting plate 1.

[0064] In the above structure, the dimensions of the fixed fin 2 and the movable fin 3 can be exactly the same. That is, the height of the fixed fin 2 and the height of the movable fin 3 are the same, the width of the fixed fin 2 and the width of the movable fin 3 are the same, and the thickness of the fixed fin 2 and the thickness of the movable fin 3 are the same. This facilitates manufacturing and assembly, and also improves the overall appearance consistency of the device.

[0065] The heat dissipation device in this embodiment also includes a heat dissipation plate 8, which is mounted on the surface of the mounting plate 1. Fixed fins 2 are attached to the surface of the heat dissipation plate 8, and movable fins 3 are attached to the surface of the heat dissipation plate 8 in the closed state. In the closed state, both the fixed fins 2 and the movable fins 3 are attached to the surface of the heat dissipation plate 8, meeting the heat dissipation requirements when the temperature is low. As the temperature rises, the movable fins 3 gradually expand, increasing the heat dissipation area to meet the heat dissipation requirements when the temperature rises. A heat source is provided on the bottom surface of the mounting plate 1 corresponding to the heat dissipation plate 8. This arrangement improves heat conduction efficiency, thereby improving heat dissipation efficiency and optimizing the heat dissipation effect.

[0066] Optionally, the fixing plate 7 is fixedly connected to the heat sink 8, and the fixing plate 7 is in turn fixedly connected to the fixing fins 2. Therefore, the three components can be fixedly connected in pairs, or the heat sink 8 and the fixing fins 2 can be fixedly connected to the fixing plate 7 respectively, with no connection between the heat sink 8 and the fixing fins 2 (only touching). The fixing connection method can be welding or integral molding, etc. Regardless of the chosen connection method, the fixing plate 7, heat sink 8, and fixing fins 2 together serve as a structural support.

[0067] The working principle of the heat dissipation device in this embodiment will be explained below.

[0068] When the circuit board temperature rises, the drive unit 4, made of shape memory alloy, senses the temperature change and deforms, gradually changing from an arched structure to a straight structure. This pushes the movable plate 5 and the movable fins 3 to move along the first direction, causing the movable fins 3 to gradually unfold. During this process, the elastic element 6 is stretched, ensuring that the movable fins 3 can stably unfold under predetermined temperature conditions. As the temperature rises further, the unfolding range of the movable fins 3 gradually increases until they are fully unfolded. At this point, the heat dissipation area of ​​the heat dissipation component increases significantly, and the heat dissipation effect reaches its maximum. When the circuit board temperature decreases, the force provided by the drive unit 4 gradually decreases, and the movable fins 3 gradually close under the restoring force of the elastic elements 6 on both sides. The drive unit 4 changes from a straight structure back to an arched structure, reducing the heat dissipation area, avoiding excessive heat dissipation, and ensuring that the circuit board temperature does not drop too low. Through the synergistic action of the drive unit 4 and the elastic element 6, the unfolding and closing of the movable fins 3 can be automatically adjusted within a certain temperature range, thereby automatically adjusting the heat dissipation area to maintain an ideal heat dissipation balance. In this way, the circuit board can effectively avoid its performance and lifespan being affected by overheating or overcooling.

[0069] Since the fume treatment equipment provided in this embodiment includes the aforementioned heat dissipation device, the technical advantages and effects that the fume treatment equipment can achieve also include the technical advantages and effects that the aforementioned heat dissipation device can achieve, and will not be repeated here.

[0070] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0071] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," 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 utility model. 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.

Claims

1. A heat dissipating device, characterized by, include: Mounting plate (1); The heat dissipation assembly includes fixed fins (2) and movable fins (3). The fixed fins (2) are disposed on the mounting plate (1) and fixed relative to the mounting plate (1). The movable fins (3) are disposed on the mounting plate (1) and movable relative to the mounting plate (1). The movable fins (3) have a closed state and an open state relative to the fixed fins (2). From the closed state to the open state, the heat dissipation area of ​​the heat dissipation assembly gradually increases; and... The driving part (4) is connected at one end to the mounting plate (1) and at the other end to the movable fin (3). The driving part (4) is made of shape memory alloy. The driving part (4) deforms along the first direction with temperature change, driving the movable fin (3) to move along the first direction to switch between the closed state and the unfolded state.

2. The heat dissipating device according to claim 1, wherein The heat dissipation device also includes: The movable plate (5), the driving part (4) and the movable fin (3) are all connected to the movable plate (5), the movable plate (5) extends along the second direction, and the first direction and the second direction are perpendicular to each other.

3. The heat dissipating device according to claim 2, wherein The heat dissipation device also includes: An elastic element (6) extends along the first direction, with one end of the elastic element (6) connected to the mounting plate (1) and the other end connected to the movable plate (5).

4. The heat dissipating device according to claim 3, wherein The heat dissipation device also includes: A fixed plate (7) is fixedly connected to the mounting plate (1). The fixed plate (7) extends along the second direction. The fixed plate (7) and the movable plate (5) are spaced apart and face each other along the first direction. One end of the fixed fin (2), the driving part (4), and the elastic member (6) are all connected to the fixed plate (7).

5. The heat dissipation device according to claim 3, characterized in that, Along the second direction, at least two sets of the heat dissipation components are provided at intervals, and the driving part (4) is disposed in the gap between two adjacent heat dissipation components; The number of drive units (4) is less than the number of heat dissipation components.

6. The heat dissipation device according to claim 5, characterized in that, Two elastic elements (6) are provided, one of which is located on the outermost side of the heat dissipation component at one end of the second direction, and the other elastic element (6) is located on the outermost side of the heat dissipation component at the other end of the second direction.

7. The heat dissipation device according to claim 1, characterized in that, When the movable fin (3) is in the closed state, the drive part (4) has an arched structure; During the process of the movable fin (3) switching from the closed state to the unfolded state, the curvature of the drive part (4) gradually decreases; When the movable fins (3) are in the deployed state, the drive unit (4) has a linear structure.

8. The heat dissipation device according to claim 1, characterized in that, The movable fin (3) is parallel to and fitted with the fixed fin (2); Both the fixed fin (2) and the movable fin (3) are perpendicular to the mounting plate (1); The fixed fin (2) has the same height as the movable fin (3), the fixed fin (2) has the same width as the movable fin (3), and the fixed fin (2) has the same thickness as the movable fin (3).

9. The heat dissipating device according to any one of claims 1 to 8, wherein The heat dissipation device also includes: Heat sink (8) is mounted on the surface of mounting plate (1). Fixed fins (2) are attached to the surface of heat sink (8). In the closed state, movable fins (3) are attached to the surface of heat sink (8).

10. An oil fume treatment device characterized by comprising: Includes the heat dissipation device as described in any one of claims 1-9.

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