Heat dissipation plate, fuse shell, fuse and electric equipment

Abstract

The utility model discloses a heat dissipation plate, fuse housing, fuse and electric equipment wherein the heat dissipation plate comprises: a plate body, one side of the plate body is provided with a plurality of heat dissipation portions, a first heat dissipation groove is defined between adjacent heat dissipation portions, one side of the first heat dissipation groove far away from the plate body is provided with a first opening, and the first opening is provided with a second opening. The heat dissipation part can be switched between a first state and a second state, and the first opening of the heat dissipation part in the first state is smaller than the first opening of the heat dissipation part in the second state. According to the heat dissipation plate provided by the utility model, one side of the plate body is provided with the plurality of heat dissipation parts which can be switched between the first state and the second state, so that the size of the first opening is adjustable, the flexible adjustment of the heat dissipation capability of the heat dissipation plate is realized, and the heat dissipation capability of a fuse can be adjusted by applying the heat dissipation plate provided by the utility model to the fuse. The reliability of the fuse can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit protection devices, and in particular relates to a heat sink, a fuse housing, a fuse and electrical equipment. Background Art

[0002] At present, fuses are usually used as circuit protection devices for power control and electric vehicles. The outside of existing fuses is generally provided with a heat sink, which dissipates heat from the fuse to ensure the normal operation of the fuse. However, the heat dissipation capacity of the above-mentioned fuse cannot be adaptively adjusted according to the temperature changes in the environment. When the electric vehicle continuously outputs ultra-large currents, huge heat is generated inside the fuse, causing the fuse temperature to rise sharply. When the fuse is under high temperature conditions for a long time, the internal fuse is prone to metal thermal fatigue, resulting in an increase in cold resistance. Under the same current conditions, the fuse is more likely to break, causing the vehicle to be unable to drive normally; at the same time, under severe cold conditions, the fuse of the fuse needs to be quickly blown in the case of a short circuit. At this time, because the fuse is in a low temperature state, it takes a longer time for the fuse to reach the melting point. This results in poor reliability of the fuse. Utility Model Content

[0003] The first object of the utility model is to provide a new technical solution for a heat sink, which can at least solve the technical problem that the heat dissipation capacity of the existing fuse cannot be adjusted.

[0004] The second object of the utility model is to provide a new technical solution for a fuse housing.

[0005] The third object of the utility model is to provide a new technical solution for a fuse.

[0006] The fourth object of the utility model is to provide a new technical solution for electrical equipment.

[0007] According to a first aspect of the utility model, a heat sink is provided, comprising: a plate body, a plurality of heat dissipation parts are provided on one side of the plate body, a first heat dissipation slot is defined between adjacent heat dissipation parts, the first heat dissipation slot has a first opening on a side away from the plate body, the heat dissipation part is switchable between a first state and a second state, wherein the first opening of the heat dissipation part in the first state is smaller than the first opening of the heat dissipation part in the second state.

[0008] Optionally, the first opening is closed when the heat dissipation portion is in the first state.

[0009] Optionally, the heat dissipation portion is formed as a memory metal portion. When the heat dissipation portion is in a first state, the memory metal portion is in a first memory form. When the heat dissipation portion is in a second state, the memory metal portion is in a second memory form.

[0010] Optionally, the heat dissipation portion is provided with a slit, and the slit divides the memory metal portion into a plurality of heat dissipation blocks.

[0011] Optionally, the slit is formed as a second heat dissipation slot, a second opening is provided on a side of the second heat dissipation slot away from the plate body, and the second opening when the heat dissipation portion is in the first state is smaller than the second opening when the heat dissipation portion is in the second state.

[0012] Optionally, the second opening is closed when the heat dissipation portion is in the first state.

[0013] Optionally, the plate body and the heat dissipation portion are integrally formed memory metal parts, and when the heat dissipation portion is in a first state, the memory metal part is in a first memory form, and when the heat dissipation portion is in a second state, the memory metal part is in a second memory form.

[0014] Optionally, the heat dissipation portion can be movably provided on the plate body so that the heat dissipation portion can be switched between a first state and a second state, and the heat dissipation plate further includes: a driving member, which is provided on the plate body, and is suitable for driving the heat dissipation portion to move so that the heat dissipation portion can be switched between the first state and the second state.

[0015] According to a second aspect of the utility model, a fuse housing is provided, comprising any one of the heat dissipation plates described above.

[0016] Optionally, the fuse housing further comprises: an outer shell, the inner wall surface of the outer shell defines a mounting cavity, and the heat sink is fixedly connected to the outer surface of the outer shell.

[0017] Optionally, the fuse housing includes a plurality of heat dissipation plates, and the plurality of heat dissipation plates are enclosed to define a mounting cavity.

[0018] According to a third aspect of the utility model, a fuse is provided, comprising the fuse housing as described in any one of the above items; and a fuse element, wherein the fuse housing is sleeved on the fuse element, and the fuse element is fixedly connected to the fuse housing.

[0019] According to a fourth aspect of the utility model, there is provided an electrical device comprising the above-mentioned fuse.

[0020] According to the heat sink of the utility model, a plurality of heat sinks that can be switched between a first state and a second state are arranged on one side of the plate body, so that the size of the first opening of the first heat sink is adjustable, thereby realizing flexible adjustment of the heat dissipation capacity of the heat sink. Specifically, when the heat sink is in the first state, the heat sink is in a heat preservation mode, and when the heat sink is in the second state, the heat sink is in a high-efficiency heat dissipation mode. Therefore, the heat sink of the utility model can provide two modes of heat preservation and high-efficiency heat dissipation, and can adapt to the heat dissipation requirements of different environments. Applying the heat sink of the utility model to the fuse can make the heat dissipation capacity of the fuse adjustable, reduce the influence of temperature on the fuse, and improve the reliability of the fuse.

[0021] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0023] Figure 1 It is a structural schematic diagram of a heat dissipation plate according to an embodiment of the utility model when the heat dissipation part is in a first state;

[0024] Figure 2 It is a structural schematic diagram of a heat dissipation plate according to an embodiment of the utility model when the heat dissipation portion is in a second state;

[0025] Figure 3 It is a structural schematic diagram of a fuse according to an embodiment of the utility model when the heat dissipation part is in a first state;

[0026] Figure 4 It is a structural schematic diagram of a fuse according to an embodiment of the utility model when the heat dissipation part is in the second state;

[0027] Figure 5 It is the temperature range of the fuse according to an embodiment of the utility model when no heat sink is provided;

[0028] Figure 6 It is the temperature range of a fuse in a low temperature state according to an embodiment of the utility model;

[0029] Figure 7 This is the temperature range of a fuse under high temperature state according to an embodiment of the utility model.

[0030] Reference numerals:

[0031] Fuse 100;

[0032] Plate body 10; heat dissipation portion 11;

[0033] First heat dissipation slot 12; first opening 121;

[0034] Slit 13;

[0035] Shell 20; Tube shell 21; End plate 22;

[0036] A first connecting terminal 30 ; a second connecting terminal 40 . DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0038] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0039] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0040] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0041] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] The heat dissipation plate according to the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0043] like Figure 1 and Figure 2 As shown, the heat dissipation plate according to the embodiment of the utility model includes a plate body 10.

[0044] Specifically, a plurality of heat dissipation parts 11 are provided on one side of the board body 10, a first heat dissipation slot 12 is defined between adjacent heat dissipation parts 11, the first heat dissipation slot 12 has a first opening 121 on the side away from the board body 10, and the heat dissipation part 11 can be switched between a first state and a second state, wherein the first opening 121 of the heat dissipation part 11 in the first state is smaller than the first opening 121 of the heat dissipation part 11 in the second state.

[0045] In other words, if Figure 1and Figure 2 As shown, the heat dissipation plate according to the embodiment of the utility model mainly includes a plate body 10, and the plate body 10 has a first side and a second side arranged opposite to each other in the thickness direction thereof, wherein a plurality of heat dissipation portions 11 are provided on the first side of the plate body 10, each heat dissipation portion 11 can be formed into a long strip extending along the width direction of the plate body 10, and the plurality of heat dissipation portions 11 can be distributed along the length direction of the plate body 10, and a first heat dissipation slot 12 is defined between all two adjacent heat dissipation portions 11, and the first heat dissipation slot 12 has a first opening 121 on a side away from the plate body 10, and the size of the first opening 121 can be changed.

[0046] Specifically, if Figure 1 and Figure 2 As shown, the heat dissipation portion 11 has a first state and a second state, and the heat dissipation portion 11 can be switched between the first state and the second state, for example, the heat dissipation portion 11 can switch between the first state and the second state autonomously, or the heat dissipation portion 11 can switch between the first state and the second state under control. When the heat dissipation portion 11 is in the first state, the size of the first opening 121 in the length direction of the plate body 10 is D1, D1 ≥ 0, at this time, the heat dissipation capacity of the heat dissipation plate is relatively weak, and the heat dissipation plate is in a heat preservation mode; when the heat dissipation portion 11 switches from the first state to the second state, the size of the first opening 121 in the length direction of the plate body 10 gradually increases, and when the heat dissipation portion 11 is in the second state, the size of the first opening 121 in the length direction of the plate body 10 is D2, D2>D1, at this time, the heat dissipation plate can fully contact with the outside air, the heat dissipation capacity of the heat dissipation plate is relatively strong, and the heat dissipation plate is in a high-efficiency heat dissipation mode.

[0047] When the heat dissipation plate of the present invention is in use, the side of the plate body 10 away from the heat dissipation portion 11 is fixed to the surface of the fuse 100 , so that the heat dissipation capacity of the fuse 100 can be adjusted.

[0048] Therefore, according to the heat sink of the embodiment of the utility model, a plurality of heat sinks 11 that can be switched between a first state and a second state are provided on one side of the plate body 10, so that the size of the first opening 121 of the first heat sink 12 is adjustable, thereby realizing flexible adjustment of the heat dissipation capacity of the heat sink. Specifically, when the heat sink is in the first state, the heat sink is in a heat preservation mode, and when the heat sink is in the second state, the heat sink is in a high-efficiency heat dissipation mode. Therefore, the heat sink of the utility model can provide two modes of heat preservation and high-efficiency heat dissipation, and can adapt to the heat dissipation requirements of different environments. Applying the heat sink of the utility model to the fuse can make the heat dissipation capacity of the fuse 100 adjustable, reduce the influence of temperature on the fuse 100, and improve the reliability of the fuse 100.

[0049] According to an embodiment of the present invention, when the heat dissipation portion 11 is in the first state, the first opening 121 is closed.

[0050] That is to say, when the heat dissipation portion 11 is in the first state, the dimension of the first opening 121 in the length direction of the plate body 10 is D1=0. At this time, the first opening 121 is in a closed state, which can reduce the heat dissipation capacity of the heat dissipation plate, that is, improve the thermal insulation capacity of the heat dissipation plate, which is beneficial to ensure the reliability of the fuse 100.

[0051] In some specific embodiments of the present invention, the heat dissipation portion 11 is formed as a memory metal portion. When the heat dissipation portion 11 is in a first state, the memory metal portion is in a first memory form. When the heat dissipation portion 11 is in a second state, the memory metal portion is in a second memory form.

[0052] In other words, in order to realize the state switching of the heat dissipation part 11, the heat dissipation part 11 can be formed as a memory metal part, and the memory metal part has two memory forms, namely a first memory form and a second memory form. The first temperature is lower than the second temperature, the first temperature memory form is the first memory form, and the second temperature form is the second memory form. The first memory form is the first state of the heat dissipation part 11, and the second memory form is the second state of the heat dissipation part 11.

[0053] In this embodiment, the shape change characteristics of the memory metal when the temperature changes are used to realize the automatic switching of the heat dissipation part 11 between the first state and the second state. This design not only improves the heat dissipation efficiency, but also enables the working state of the heat dissipation plate to be automatically adjusted according to the ambient temperature without additional control, which has the advantages of intelligence and automation.

[0054] It should be noted that the memory metal is, for example, but not limited to, Cu-Zn-Al alloy and Cu-Al-Ni alloy, which can be specifically selected according to actual needs and will not be described in detail in this embodiment.

[0055] According to an embodiment of the present invention, the heat dissipation portion 11 is provided with a slit 13 , and the slit 13 divides the memory metal portion into a plurality of heat dissipation blocks.

[0056] That is to say, Figure 1 and Figure 2 As shown, the heat dissipation portion 11 is provided with a plurality of slits 13 evenly distributed along its length direction. The memory metal portion can be divided into a plurality of heat dissipation blocks through the plurality of slits 13, which not only further increases the heat dissipation area, but also enables the heat dissipation portion 11 to change its shape more flexibly when the temperature changes, thereby improving the temperature uniformity inside the fuse 100 and ensuring the reliability of the fuse 100.

[0057] In some specific embodiments of the present invention, the slit 13 is formed as a second heat dissipation groove, and a second opening is provided on a side of the second heat dissipation groove away from the plate body 10, and the second opening of the heat dissipation portion 11 in the first state is smaller than the second opening of the heat dissipation portion 11 in the second state.

[0058] In other words, the slit 13 can be designed as a second heat dissipation slot, and the second heat dissipation slot has a second opening on a side away from the plate body 10, and the size of the second opening is changeable. When the heat dissipation portion 11 is in the first state, the size of the second opening in the length direction of the heat dissipation portion 11 is D3, D3≥0, and the heat dissipation capacity of the heat dissipation plate is relatively weak, and the heat dissipation plate is in the heat preservation mode; when the heat dissipation portion 11 is switched from the first state to the second state, the size of the second opening in the length direction of the heat dissipation portion 11 gradually increases. When the heat dissipation portion 11 is in the second state, the size of the second opening in the length direction of the plate body 10 is D4, D4>D3, and the heat dissipation capacity of the heat dissipation plate is relatively strong, thereby increasing the adjustment range of the heat dissipation capacity of the heat dissipation plate, and further adapting to the heat dissipation requirements under different temperature environments.

[0059] In some optional examples of the present invention, the second opening is closed when the heat dissipation portion 11 is in the first state.

[0060] That is to say, when the heat dissipation portion 11 is in the first state, the dimension of the second opening in the length direction of the plate body 10 is D3=0. At this time, the second opening is in a closed state, which can further reduce the heat dissipation capacity of the heat dissipation plate, that is, further improve the thermal insulation capacity of the heat dissipation plate, which is beneficial to ensure the reliability of the fuse 100.

[0061] According to one embodiment of the utility model, the plate body 10 and the heat dissipation part 11 are an integrally formed memory metal piece. When the heat dissipation part 11 is in a first state, the memory metal piece is in a first memory form. When the heat dissipation part 11 is in a second state, the memory metal piece is in a second memory form.

[0062] Specifically, Figure 1 and Figure 2 As shown, in order to realize the state switching of the heat dissipation part 11, the plate body 10 and the heat dissipation part 11 can be made of a memory metal part, and the memory metal part has two memory forms, a first temperature memory form and a second temperature memory form. The first temperature is lower than the second temperature, the first temperature memory form is the first memory form, and the second temperature form is the second memory form; when the memory metal part is in the first memory form, the heat dissipation part 11 is in the first state, and when the memory metal part is in the second memory form, the heat dissipation part 11 is in the second state.

[0063] In this embodiment, the shape change characteristics of the memory metal when the temperature changes are utilized to realize the automatic switching of the heat dissipation part 11 between the first state and the second state. This design not only improves the heat dissipation efficiency, but also enables the working state of the heat dissipation plate to be automatically adjusted according to the ambient temperature without additional control, and has the advantages of intelligence and automation; the plate body 10 and the heat dissipation part 11 are integrally formed, which can reduce the number of heat dissipation plates and facilitate production and assembly.

[0064] In some specific embodiments of the present invention, the heat dissipation portion 11 can be movably provided on the plate body 10 so that the heat dissipation portion 11 can be switched between a first state and a second state. The heat dissipation plate also includes: a driving member, which is provided on the plate body 10 and is suitable for driving the heat dissipation portion 11 to move so that the heat dissipation portion 11 can be switched between the first state and the second state.

[0065] In other words, another way to achieve the state switching of the heat dissipation part 11 is to movably arrange the heat dissipation part 11 on one side of the board body 10. Specifically, the cross-section of the heat dissipation part 11 can be arc-shaped, and the heat dissipation part 11 can swing between the first position and the second position around the connection between itself and the board body 10. When the heat dissipation part 11 is in the first position, the heat dissipation part 11 is in the first state, and when the heat dissipation part 11 is in the second position, the heat dissipation part 11 is in the second state.

[0066] The heat sink also includes a driving member, which is disposed on the plate body 10 and is in transmission connection with the heat sink 11, so that the driving member can drive the heat sink 11 to move between the first position and the second position, thereby realizing that the heat sink 11 can switch between the first state and the second state. This method can realize the state switching of the heat sink 11 by controlling the driving member, which is more flexible and convenient.

[0067] Furthermore, the driving member is electrically connected to a temperature detection unit, such as a temperature sensor, and the driving member can drive the heat dissipation portion 11 to move according to the temperature detected by the temperature detection unit.

[0068] In summary, according to the heat sink of the embodiment of the utility model, a plurality of heat sinks 11 that can be switched between a first state and a second state are provided on one side of the plate body 10, so that the size of the first opening 121 of the first heat sink 12 is adjustable, thereby realizing flexible adjustment of the heat dissipation capacity of the heat sink. Specifically, when the heat sink 11 is in the first state, the heat sink is in a heat preservation mode, and when the heat sink 11 is in the second state, the heat sink is in a high-efficiency heat dissipation mode. Therefore, the heat sink of the utility model can provide two modes of heat preservation and high-efficiency heat dissipation, and can adapt to the heat dissipation requirements of different environments. Applying the heat sink of the utility model to the fuse can make the heat dissipation capacity of the fuse 100 adjustable, reduce the influence of temperature on the fuse 100, and improve the reliability of the fuse 100.

[0069] The embodiment of the utility model further provides a fuse housing, including the heat sink described in any of the above embodiments. Since the heat sink according to the utility model has the above technical effects, the fuse housing according to the embodiment of the utility model also has corresponding technical effects, which will not be described in detail in this embodiment.

[0070] In some specific embodiments of the present invention, the fuse housing further includes a shell 20 , an inner wall surface of the shell 20 defines a mounting cavity, and the heat sink is fixedly connected to the outer surface of the shell 20 .

[0071] That is to say, the fuse shell mainly includes the shell 20 and the heat sink described in any of the above embodiments. The heat sink can be fixedly connected to the outer surface of the shell 20 by welding or bonding, so that the heat dissipation capacity of the fuse 100 can be controlled by switching the state of the heat dissipation portion 11. Under low temperature conditions, the heat dissipation portion 11 can be switched to the first state, at which time the heat sink plays a certain role in heat preservation. Under high temperature conditions, the heat dissipation portion 11 is switched to the second state, at which time the heat sink has good heat dissipation capacity, thereby ensuring the reliability of the fuse 100. Moreover, the use of this structure makes it easy to improve the shell of the existing fuse 100 into the fuse shell described in this embodiment.

[0072] In some optional examples of the present invention, the fuse housing includes a plurality of heat dissipation plates, and the plurality of heat dissipation plates are enclosed to define a mounting cavity.

[0073] In other words, the fuse housing mainly includes a plurality of heat sinks, through which an installation cavity can be defined and formed, and the installation cavity can provide an installation cavity for installing a fuse (for example, a fuse) and an arc extinguishing material. Specifically, when the fuse housing is a rectangular parallelepiped structure, the number of heat sinks can be four, and the four heat sinks are fixedly enclosed to form a part of the outer shell 20 (for example, a tube shell 21), and the heat dissipation portion 11 is located on the outside of the fuse housing, and the heat dissipation plate is away from the heat dissipation portion 11. The side defines a mounting cavity to form.

[0074] Compared with the above embodiment, this example can use multiple heat sinks to replace part of the structure of the housing 20, thereby simplifying the structure of the fuse housing, and is beneficial to adjusting the heat dissipation capacity of the fuse 100, which can further reduce the influence of the ambient temperature of the working conditions on the fuse 100.

[0075] In some specific embodiments of the present invention, the fuse housing further includes two end plates 22 , and the two short plates seal the two open ends of the tube shell 21 .

[0076] like Figure 3 and Figure 4 As shown, an embodiment of the utility model further provides a fuse 100, comprising a fuse housing and a fuse element as described in any of the above embodiments, wherein the fuse housing is sleeved on the fuse element, and the fuse element is fixedly connected to the fuse housing.

[0077] Specifically, the fuse of the embodiment of the utility model mainly includes the fuse housing, the fuse element (for example, the fuse), the first connecting terminal 30, the second connecting terminal 40 and the arc extinguishing material described in any of the above embodiments, the fuse and the arc extinguishing material are arranged in the installation cavity, the first connecting terminal 30 is fixed to one of the end plates 22 and is fixedly connected to the first end of the fuse, and the first connecting terminal 30 is electrically connected to the fuse, the second connecting terminal 40 is fixed to the other end plate 22 and is fixedly connected to the second end of the fuse, and the second connecting terminal 40 is electrically connected to the fuse.

[0078] Since the heat sink according to the present invention has the above technical effects, the fuse 100 according to the embodiment of the present invention also has corresponding technical effects, which will not be described in detail in this embodiment.

[0079] The embodiment of the utility model performs temperature simulation on the fuse 100 in different states, and analyzes the temperature distribution of the fuse 100 in different states by providing a fixed heat source for the fuse.

[0080] The simulation data is shown in Table 1:

[0081] like Figure 5 and Figure 6 As shown, in the original state, the temperature range of the fuse 100 is 88.71°C-96.06°C, and in the low temperature (heat preservation) state, the temperature range of the fuse 100 is 105.65°C-114.54°C. Compared with the original state, the heat sink can reduce the heat loss, so that the temperature of the internal fuse increases;

[0082] like Figure 7 As shown, in the high temperature (heat dissipation) state, the temperature range of the fuse 100 is 84.64° C.-90.66° C. Compared with the original state, the memory metal can increase the heat loss and reduce the temperature of the internal fuse.

[0083] Table 1: Simulation data table

[0084] Fuse status Original state Low temperature (warmth preservation) state High temperature (heat dissipation) state Maximum temperature:℃ 96.03 114.54 90.66 Minimum temperature:℃ 88.71 105.65 84.64

[0085] The embodiment of the utility model further provides an electrical device, the electrical device is, for example, but not limited to, a vehicle, and the electrical device includes the fuse housing described in any of the above embodiments. Since the heat sink according to the utility model has the above technical effects, the fuse 100 according to the embodiment of the utility model also has corresponding technical effects, which will not be described in detail in this embodiment.

[0086] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A heat sink, characterized in that: include: A plate body, wherein a plurality of heat dissipation parts are provided on one side of the plate body, a first heat dissipation slot is defined between adjacent heat dissipation parts, a first heat dissipation slot has a first opening on a side away from the plate body, and the heat dissipation part can be switched between a first state and a second state, wherein: The first opening of the heat dissipation portion in the first state is smaller than the first opening of the heat dissipation portion in the second state.

2. The heat sink according to claim 1, characterized in that: When the heat dissipating portion is in the first state, the first opening is closed.

3. The heat sink according to claim 1, characterized in that: The heat dissipation portion is formed as a memory metal portion. When the heat dissipation portion is in a first state, the memory metal portion is in a first memory form. When the heat dissipation portion is in a second state, the memory metal portion is in a second memory form.

4. The heat sink according to claim 3, characterized in that: The heat dissipation portion is provided with slits, and the slits divide the memory metal portion into a plurality of heat dissipation blocks.

5. The heat sink according to claim 4, characterized in that: The slit is formed as a second heat dissipation slot, a second opening is provided on a side of the second heat dissipation slot away from the plate body, and the second opening when the heat dissipation portion is in the first state is smaller than the second opening when the heat dissipation portion is in the second state.

6. The heat sink according to claim 5, characterized in that: The second opening is closed when the heat dissipation portion is in the first state.

7. The heat sink according to claim 1, characterized in that: The plate body and the heat dissipation part are an integrally formed memory metal piece. When the heat dissipation part is in a first state, the memory metal piece is in a first memory shape. When the heat dissipation part is in a second state, the memory metal piece is in a second memory shape.

8. The heat sink according to claim 1, characterized in that: The heat dissipation portion is movably disposed on the plate body so that the heat dissipation portion can be switched between a first state and a second state, and the heat dissipation plate further includes: A driving member is disposed on the plate body, and is suitable for driving the heat dissipation portion to move so that the heat dissipation portion switches between the first state and the second state.

9. A fuse housing, characterized in that: The heat dissipation plate comprises the heat dissipation plate according to any one of claims 1 to 8.

10. The fuse housing according to claim 9, characterized in that Also includes: The outer shell has an inner wall surface defining a mounting cavity, and the heat sink is fixedly connected to the outer surface of the outer shell.

11. The fuse housing according to claim 9, characterized in that: The fuse housing includes a plurality of heat dissipation plates, and the plurality of heat dissipation plates are enclosed to define a mounting cavity.

12. A fuse, characterized in that: include: The fuse housing according to any one of claims 9 to 11; The fuse housing is sleeved on the fuse, and the fuse is fixedly connected to the fuse housing.

13. An electrical equipment, characterized in that: The invention comprises the fuse as claimed in claim 12.

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