Patent Description:
A heat dissipation solution of a conventional electronic apparatus resolves an insulation problem before considering a heat dissipation problem. For example, a power switch device is covered with an insulation film, and then bonded to a heat sink to resolve a heat conduction problem. Alternatively, a power device is first bonded to a ceramic substrate to resolve an insulation problem, and then bonded to a heat sink to resolve a heat conduction problem. For insulation structures such as the insulation film and the ceramic substrate, it is difficult to consider heat conduction efficiency while ensuring insulation, resulting in poor heat dissipation effect of the electronic apparatus.

<CIT> describes the problem of inefficient dissipation of heat generated by power components, such as MOSFETs, IGBTs, triacs, thyristors, and the like, within electronic circuits housed in closed housings. Traditional solutions are described which involve heat sinks requiring significant space and manufacturing costs, or reliance on circuit boards to conduct heat, which also increases costs and space requirements and can lead to heating other components. Here, a solution is described that enables the cooling of power components at lower costs and with less manufacturing effort, even when these components are arranged in closed housings. This is achieved by directly cooling the circuit within the circuit housing through direct contact or connection between the housing wall and the power components, negating the need for separate heat sinks or specially designed circuit boards with high thermal conductivity.

<CIT> describes the problem to optimize the power output of solar panels in photovoltaic power generation systems. The issue lies in the fact that the output characteristics of photovoltaic cells can change significantly due to external factors such as temperature and light radiation intensity. Therefore, it is crucial for the photovoltaic cells to continuously output maximum power, allowing for more effective use of solar energy. Variations in environmental conditions such as sunlight intensity and ambient temperature cause variations in the maximum power point (MPP) of the solar panels. Tracking and adjusting the MPP dynamically is necessary to ensure that the photovoltaic panels operate effectively at the MPP regardless of external environmental changes. A design is prposed which effectively addresses these technical challenges of photovoltaic power optimization under varying environmental conditions by ensuring maximum power point operation, reliable component protection, good thermal management, and maintainability of the system.

The object of the present invention is to provide an electronic apparatus and a photovoltaic power optimizer to improve heat dissipation performance of an electronic apparatus. This object is solved by the attached independent claims and further embodiments and improvements of the invention are listed in the attached dependent claims. Hereinafter, up to the "brief description of the drawings", expressions like ". aspect according to the invention", "according to the invention", or "the present invention", relate to technical teaching of the broadest embodiment as claimed with the independent claims. Expressions like "implementation", "design", "optionally", "preferably", "scenario", "aspect" or similar relate to further embodiments as claimed, and expressions like "example", ". aspect according to an example", "the disclosure describes", or "the disclosure" describe technical teaching which relates to the understanding of the invention or its embodiments, which, however, is not claimed as such.

A first aspect according to the invention provides an electronic apparatus, including a circuit board, a heat dissipation housing, and an insulation member. The circuit board has a first surface and a second surface opposite to each other, where a first heat dissipation region is formed on the first surface and a second heat dissipation region is formed on the second surface. The heat dissipation housing includes a first heat dissipation member and a second heat dissipation member. The insulation member wraps the heat dissipation housing. The first heat dissipation member has a first heat dissipation surface that is in direct contact with the first heat dissipation region. The second heat dissipation member is connected to the first heat dissipation member in a first direction, and has a second heat dissipation surface that is in direct contact with the second heat dissipation region. The first heat dissipation region and the second heat dissipation region are sealed by using the first heat dissipation member and the second heat dissipation member.

The first heat dissipation member and the second heat dissipation member of the electronic apparatus are both solid-state heat dissipation members, and maintain a fixed form when dissipating heat on the circuit board. This ensures stability of heat dissipation. The first heat dissipation member and the second heat dissipation member dissipate the heat on the circuit board by being in direct contact with the heat dissipation regions of the circuit board, to improve heat dissipation performance of the circuit board. On the basis of ensuring the heat dissipation performance of the circuit board, insulation performance of the electronic apparatus is improved by wrapping the heat dissipation housing by using the insulation member. A form of wrapping the heat dissipation housing by using the insulation member may not be a sealed wrap, and different wrapping forms may be selected based on an actual usage of the heat dissipation housing. For example, if a diameter of conductive sundries that may occur in a use environment is not less than <NUM>, the entire insulation housing wraps the heat dissipation housing, and the insulation housing may be provided with a hole less than <NUM> at a local position, so that heat dissipation performance of the electronic apparatus can be further improved. It can also prevent the conductive sundries from extending into the insulation housing and affecting the insulation performance of the electronic apparatus.

According to the first aspect, in a possible implementation, the insulation member includes the insulation housing, the insulation housing has a mounting cavity, and the heat dissipation housing is accommodated in the mounting cavity.

In this possible implementation, the electronic apparatus can be insulated based on the insulation housing, and the insulation housing and the heat dissipation housing may be separately manufactured for assembly.

According to the first aspect, in a possible implementation, the insulation housing is detachably connected to the heat dissipation housing.

In this possible implementation, the insulation housing may include a first sub-housing and a second sub-housing. The heat dissipation housing and the second sub-housing are first assembled, and then the first sub-housing and the second sub-housing are assembled, so that the insulation housing wraps the heat dissipation housing.

According to the first aspect, in a possible implementation, the insulation housing further has a heat dissipation channel in communication with the mounting cavity.

In this possible implementation, the mounting cavity of the insulation housing exchanges more gas with an environment outside the insulation housing, to improve heat dissipation in the mounting cavity.

According to the first aspect, in a possible implementation, the electronic apparatus further includes a gas driving member, the gas driving member is connected to the insulation housing, and the gas driving member is configured to drive gas to flow in the heat dissipation channel.

In this possible implementation, the gas driving member is used to actively drive the gas to flow, to further enhance the heat dissipation in the mounting cavity.

According to the first aspect, in a possible implementation, there is a ventilation gap between an inner wall of the mounting cavity and the heat dissipation housing.

In this possible implementation, the ventilation gap takes away heat of the heat dissipation housing by using flowing gas, to improve heat dissipation efficiency of the heat dissipation housing.

According to the first aspect, in a possible implementation, the insulation housing is provided with a first clamping part in the mounting cavity, the heat dissipation housing is provided with a second clamping part, and the first clamping part is clamped with the second clamping part to limit relative displacement between the insulation housing and the heat dissipation housing.

In this possible implementation, the heat dissipation housing and the insulation housing are fastened by using the first clamping part and the second clamping part, to reduce a risk that the heat dissipation housing shakes in the insulation housing.

According to the first aspect, in a possible implementation, the first clamping part includes an annular groove disposed in the mounting cavity, the second clamping part includes an annular protrusion disposed on an outer periphery of the heat dissipation housing, and the annular protrusion is accommodated in the annular groove.

In this possible implementation, the first clamping part and the second clamping part are not disposed on a first outer surface and a second outer surface, and do not occupy a heat dissipation area of the first outer surface and the second outer surface, so that heat dissipation effect of the heat dissipation housing can be improved.

According to the first aspect, in a possible implementation, the first heat dissipation member has a first outer surface opposite to the first heat dissipation surface, the second heat dissipation member has a second outer surface opposite to the second heat dissipation surface, the first outer surface and/or the second outer surface are/is covered with an insulation layer, and the insulation layer forms the insulation member.

In this possible implementation, the first heat dissipation member and the second heat dissipation member may not perform insulation processing by using the insulation housing, but directly cover surfaces of the first heat dissipation member and the second heat dissipation member with the insulation layer to implement insulation. Covering with an insulation layer may be implemented by pasting one layer of insulation film, coating one layer of insulation film, or the like.

According to the first aspect, in a possible implementation, the circuit board includes an electronic component, and the electronic component is located in the first heat dissipation region. The first heat dissipation surface has a giveaway slot, and the electronic component is accommodated in the giveaway slot.

In this possible implementation, for an uneven surface of the electronic component on which the electronic component is disposed, the first heat dissipation surface is provided with the giveaway slot to bypass the electronic component, so that the first heat dissipation surface may still be in contact with the first heat dissipation region on the first surface.

According to the first aspect, in a possible implementation, a heat dissipation filler is further included, where the heat dissipation filler fills a gap between an inner wall of the giveaway slot and the electronic component.

In this possible implementation, the heat dissipation filler may reduce thermal resistance from the electronic component to the first heat dissipation member. In addition, because the giveaway slot is enlarged to avoid the electronic component, a local region of the first heat dissipation surface cannot directly be in contact with the first heat dissipation region, and the heat dissipation filler may further reduce thermal resistance from the first heat dissipation region to the first heat dissipation member.

According to the first aspect, in a possible implementation, the first heat dissipation member has a first outer surface opposite to the first heat dissipation surface, the second heat dissipation member has a second outer surface opposite to the second heat dissipation surface, and a plurality of heat dissipation fins are disposed on the first outer surface and/or the second outer surface.

In this possible implementation, a surface area of the heat dissipation housing is increased by using the heat dissipation fins. This improves heat dissipation efficiency of the heat dissipation housing.

According to the first aspect, in a possible implementation, a metal region exists at peripheries of the first surface and the second surface, and the metal region is covered with a metal layer.

In this possible implementation, the metal layer may be used for electromagnetic shielding. In addition, when the metal layer is in contact with both the first heat dissipation member and the second heat dissipation member, the metal layer may accelerate heat conduction between the first heat dissipation member and the second heat dissipation member, and reduce a risk of local heat accumulation in the first heat dissipation member and the second heat dissipation member.

According to the first aspect, in a possible implementation, the metal region has a via that penetrates the first surface and the second surface.

In this possible implementation, the via may also implement connection between the first surface and the second surface, and a metal layer in the via may further enhance heat conduction efficiency of the first surface and the second surface.

According to the first aspect, in a possible implementation, the heat dissipation housing further includes a bolt, and the first heat dissipation member is connected to the second heat dissipation member by using the bolt.

In this possible implementation, the first heat dissipation member and the second heat dissipation member are detachably connected, and the first heat dissipation member or the second heat dissipation member may be separately replaced in subsequent maintenance. The first heat dissipation member and the second heat dissipation member may be connected by using the bolt in a plurality of forms. For example, both the first heat dissipation member and the second heat dissipation member are provided with a via, and the bolt is connected to a nut after passing through the first heat dissipation member and the second heat dissipation member. For another example, the first heat dissipation member is provided with a threaded hole, the second heat dissipation member is provided with a via, and the bolt is threadedly connected to the threaded hole of the first heat dissipation member after passing through the second heat dissipation member.

According to the first aspect, in a possible implementation, the circuit board is provided with a mounting via, and the bolt passes through the mounting via.

In this possible implementation, the bolt further passes through the circuit board, and in an extension direction perpendicular to the bolt, a relative position of the circuit board and the heat dissipation housing may be further fastened by using the bolt.

According to the first aspect, in a possible implementation, the heat dissipation housing further includes a sealing ring, the sealing ring is sandwiched between the first heat dissipation member and the second heat dissipation member, and the circuit board is located in the sealing ring.

In this possible implementation, the sealing ring compensates for a tolerance between the first heat dissipation member and the second heat dissipation member, and the sealing ring is used to seal an outer periphery of the circuit board, to implement waterproof and moisture-proof of the circuit board.

According to the first aspect, in a possible implementation, the first heat dissipation member and the second heat dissipation member are welded and fastened.

In this possible implementation, the first heat dissipation member and the second heat dissipation member have high connection strength, and circumferential welding around the first heat dissipation member and the second heat dissipation member can also enhance waterproof and moisture-proof of the circuit board.

According to the first aspect, in a possible implementation, the first heat dissipation member and/or the second heat dissipation member are/is metal heat dissipation members/a metal heat dissipation member.

In this possible implementation, the first heat dissipation member and the second heat dissipation member improve heat dissipation effects of the first heat dissipation member and the second heat dissipation member by using high thermal conductivity of a metal. In addition, the metal heat dissipation member is easy to process, to reduce processing costs.

According to the first aspect, in a possible implementation, a clamping flange is disposed in the heat dissipation housing, and the clamping flange is in contact with an outer periphery of the circuit board to restrict movement of the circuit board relative to the heat dissipation housing.

In this possible implementation, positions of the circuit board and the first heat dissipation member or the second heat dissipation member may be fastened in advance by using the clamping flange, and then the first heat dissipation member and the second heat dissipation member are fastened.

A second aspect in accordance with the invention provides a photovoltaic power optimizer. The photovoltaic power optimizer includes a connection cable and the electronic apparatus in any implementation of the first aspect. One end of the connection cable is electrically connected to a circuit board, and the other end extends out of an insulation member to form a connector. The connector is configured to connect a photovoltaic module.

The photovoltaic power optimizer is configured to connect the photovoltaic module to track a maximum power point of the photovoltaic module in real time. In addition, the photovoltaic power optimizer ensures stability of heat dissipation by using a first heat dissipation member and a second heat dissipation member in the electronic apparatus. The first heat dissipation member and the second heat dissipation member dissipate the heat on the circuit board in the form of being in direct contact with the heat dissipation regions of the circuit board, to improve the heat dissipation performance of the circuit board. On the basis of ensuring the heat dissipation performance of the circuit board, the insulation performance of the electronic apparatus is improved by wrapping the heat dissipation housing by using the insulation member.

In the following specific embodiments, this application is further described with reference to the accompanying drawings.

The following describes implementations of this application by using specific embodiments. A person skilled in the art may easily learn of other advantages and effects of this application based on content disclosed in this specification. Although this application is described with reference to an example embodiment, it does not mean that a characteristic of this application is limited only to this implementation. On the contrary, a purpose of describing this application with reference to an implementation is to cover another option or modification that may be derived based on claims of this application. To provide an in-depth understanding of this application, the following description includes a plurality of specific details. This application may be alternatively implemented without using these details. In addition, to avoid confusion or blurring a focus of this application, some specific details are omitted from the description. It should be noted that embodiments in this application and the features in embodiments may be mutually combined in the case of no conflict.

The following terms "first", "second", and the like are merely used for description, and shall not be understood as an indication or implication of relative importance or implicit indication of a quantity of indicated technical features. Therefore, a feature limited by "first", "second", or the like may explicitly or implicitly include one or more features. In the description of this application, unless otherwise stated, "a plurality of" means two or more than two. Orientation terms such as "up", "down", "left", and "right" are defined relative to an orientation of schematic placement of components in the accompanying drawings. It should be understood that these directional terms are relative concepts and are used for relative description and clarification. These directional terms may vary accordingly depending on an orientation in which the components are placed in the accompanying drawings.

In this application, unless otherwise explicitly specified and limited, a term "connection" should be understood in a broad sense. For example, the "connection" may be a fastened connection, a detachable connection, or an integrated connection; and may be a direct connection or an indirect connection by using an intermediate medium. The term "and/or" used in this specification includes any and all combinations of one or more related listed items.

When the following embodiments are described in detail with reference to schematic diagrams, for ease of description, a diagram indicating a partial structure of a component is partially enlarged not based on a general scale. In addition, the schematic diagrams are merely examples, and should not limit the protection scope of this application herein.

<FIG> is a schematic diagram of a structure of a photovoltaic power optimizer <NUM> according to an implementation of this application. <FIG> is a schematic diagram of a structure of the photovoltaic power optimizer <NUM> connected to a photovoltaic module <NUM> according to an implementation of this application.

As shown in <FIG>, the photovoltaic power optimizer <NUM> includes an electronic apparatus <NUM> and a cable. One end of the cable is connected to the electronic apparatus <NUM>, and the other end forms a connector <NUM>. Refer to <FIG>. Based on a soft feature of the cable, after the electronic apparatus <NUM> is fastened, the connector <NUM> of the cable may be pulled to a position of the photovoltaic module <NUM> to connect the photovoltaic module <NUM>. After the connector <NUM> of the cable is connected to the photovoltaic module <NUM>, the electronic apparatus <NUM> is electrically connected to the photovoltaic module <NUM>. After the electronic apparatus <NUM> is electrically connected to the photovoltaic module <NUM>, the electronic apparatus <NUM> may track a maximum power point of the photovoltaic module <NUM>, to optimize power of the photovoltaic module <NUM>. The photovoltaic power optimizer <NUM> may have a plurality of cables, so that a plurality of photovoltaic modules <NUM> are simultaneously connected by using one electronic apparatus <NUM>, to simultaneously track maximum power points of the plurality of photovoltaic modules <NUM>.

<FIG> is a cross-sectional view of the electronic apparatus <NUM> according to an implementation of this application.

As shown in <FIG>, the electronic apparatus <NUM> includes a circuit board <NUM> and a heat dissipation housing <NUM>. The circuit board <NUM> includes a plate body <NUM> having a first surface and a second surface opposite in a first direction. The first surface has a first heat dissipation region <NUM>, and the first heat dissipation region <NUM> is located in a central part of the first surface. The second surface has a second heat dissipation region <NUM>, and the second heat dissipation region <NUM> is located in a central part of the second surface. The heat dissipation housing <NUM> includes a first heat dissipation member <NUM> and a second heat dissipation member <NUM>, and the first heat dissipation member <NUM> and the second heat dissipation member <NUM> sandwich the circuit board <NUM> in the first direction. Optionally, the first heat dissipation member <NUM> is integrally formed, and has uniform thermal conductivity. Similarly, the second heat dissipation member <NUM> is integrally formed, and has uniform thermal conductivity.

A surface that is of the first heat dissipation member <NUM> and that faces the second heat dissipation member <NUM> is a first heat dissipation surface 210a, and the first heat dissipation surface 210a is in direct contact with the first heat dissipation region <NUM>. Heat of the first heat dissipation region <NUM> may be directly conducted to the first heat dissipation member <NUM>, and discharged through the first heat dissipation member <NUM>. A surface that is of the second heat dissipation member <NUM> and that faces the first heat dissipation member <NUM> is a second heat dissipation surface 230a, and the second heat dissipation surface 230a is in direct contact with the second heat dissipation region <NUM>. Heat of the second heat dissipation region <NUM> may be directly conducted to the second heat dissipation member <NUM>, and discharged through the second heat dissipation member <NUM>.

The first heat dissipation member <NUM> is connected to the second heat dissipation member <NUM> in the first direction. Specifically, the first heat dissipation member <NUM> and the second heat dissipation member <NUM> are respectively disposed on two sides of the circuit board <NUM> in the first direction. After the first heat dissipation member <NUM> is connected to the second heat dissipation member <NUM>, the circuit board <NUM> is sandwiched in the first direction.

Optionally, the heat dissipation housing <NUM> further includes a bolt <NUM>, the first heat dissipation member <NUM> is provided with a threaded hole, the second heat dissipation member <NUM> is provided with a via, and the bolt <NUM> passes through the via of the second heat dissipation member <NUM> and is threadedly connected to the threaded hole of the first heat dissipation member <NUM>. In this way, the first heat dissipation member <NUM> is connected to the second heat dissipation member <NUM>. There are at least two bolts <NUM>, and the at least two bolts <NUM> are connected to the first heat dissipation member <NUM> and the second heat dissipation member <NUM> to further limit rotation of the first heat dissipation member <NUM> relative to the second heat dissipation member <NUM> around any bolt <NUM>. It may be understood that the via may also be disposed on both the first heat dissipation member <NUM> and the second heat dissipation member <NUM>, and the bolt <NUM> passes through vias of the first heat dissipation member <NUM> and the second heat dissipation member <NUM> and is connected to a nut, to fasten the first heat dissipation member <NUM> and the second heat dissipation member <NUM>.

Refer to <FIG>. Alternatively, in addition to connecting the first heat dissipation member <NUM> and the second heat dissipation member <NUM> by using the bolt <NUM>, the first heat dissipation member <NUM> may be connected to the second heat dissipation member <NUM> in a form of welding. After the first heat dissipation member <NUM> and the second heat dissipation member <NUM> press the circuit board <NUM> in the first direction, the first heat dissipation member <NUM> and the second heat dissipation member <NUM> are fastened in the form of welding. A welding seam <NUM> may surround the entire first heat dissipation member <NUM> and the second heat dissipation member <NUM>, and sealing of the first heat dissipation region <NUM> and the second heat dissipation region <NUM> is strengthened by using the annular welding seam <NUM>.

In this form, the first heat dissipation member <NUM> is provided with an annular clamping flange <NUM> on an outer periphery, and the clamping flange <NUM> is in contact with an outer periphery of the circuit board <NUM>. The clamping flange <NUM> has a wall surface that is substantially parallel to the first direction and that matches an outer peripheral contour of the circuit board <NUM>. When the outer periphery of the circuit board <NUM> is in contact with the wall surface of the clamping flange <NUM>, the clamping flange <NUM> may limit a relative position of the circuit board <NUM> with the first heat dissipation member <NUM> in a direction perpendicular to the first direction. After the circuit board <NUM> is clamped in the clamping flange <NUM>, the first heat dissipation member <NUM> and the second heat dissipation member <NUM> are welded. It may be understood that the clamping flange <NUM> may alternatively be disposed on the second heat dissipation member <NUM>.

Refer to <FIG>. Optionally, a sealing ring <NUM> may be further disposed between the first heat dissipation member <NUM> and the second heat dissipation member <NUM>. The sealing ring <NUM> is sandwiched between the first heat dissipation member <NUM> and the second heat dissipation member <NUM>, and the circuit board <NUM> is located in the sealing ring <NUM>. The sealing ring <NUM> may further enhance sealing performance of the first heat dissipation region <NUM> and the second heat dissipation region <NUM>.

Optionally, when the sealing ring <NUM> is sandwiched between the first heat dissipation member <NUM> and the second heat dissipation member <NUM>, an external force may be applied to the first heat dissipation member <NUM> and the second heat dissipation member <NUM> by using an insulation housing <NUM>, so that the first heat dissipation member <NUM> and the second heat dissipation member <NUM> approach each other and press the sealing ring <NUM>. In this way, relative positions of the first heat dissipation member <NUM> and the second heat dissipation member <NUM> are fastened, and the first heat dissipation region <NUM> and the second heat dissipation region <NUM> are sealed. It may be understood that the sealing ring <NUM> may also be disposed between the first heat dissipation member <NUM> and the second heat dissipation member <NUM> that are connected by using the bolt <NUM>, to enhance sealing of the first heat dissipation region <NUM> and the second heat dissipation region <NUM>. Certainly, before the first heat dissipation member <NUM> and the second heat dissipation member <NUM> are welded, the sealing ring <NUM> may be placed first to enhance sealing performance of the first heat dissipation member <NUM> and the second heat dissipation member <NUM>.

Refer to <FIG> The first heat dissipation member <NUM> has a first outer surface 210b opposite to the first heat dissipation surface 210a, and the second heat dissipation member <NUM> has a second outer surface 230b opposite to the second heat dissipation surface 230a. The first outer surface 210b is a plane, and the second outer surface 230b is provided with a plurality of heat dissipation fins <NUM>. The heat dissipation fin <NUM> may increase a surface area of the second heat dissipation member <NUM> to accelerate heat dissipation of the second heat dissipation member <NUM>. It may be understood that the plurality of heat dissipation fins <NUM> may also be disposed on the first outer surface 210b to accelerate heat dissipation of the first heat dissipation member <NUM>. The heat dissipation fin <NUM> may be integrally formed with the first heat dissipation member <NUM> or the second heat dissipation member <NUM>.

The circuit board <NUM> further includes an electronic component <NUM>, and the electronic component <NUM> is fastened to the plate body <NUM>. The electronic component <NUM> is located on the first surface. The electronic component <NUM> may be a component such as a resistor or a capacitor. An expected function is implemented by connecting the electronic component <NUM> to the plate body <NUM>. The first heat dissipation member <NUM> has a giveaway slot <NUM> on the first heat dissipation surface 210a, and the giveaway slot <NUM> is correspondingly disposed to the electronic component <NUM>. When the first heat dissipation member <NUM> is in direct contact with the first heat dissipation region <NUM>, the electronic component <NUM> is accommodated in the giveaway slot <NUM>. There is a specific gap between the giveaway slot <NUM> and the electronic component <NUM>, and the gap decreases heat transfer efficiency. The electronic apparatus <NUM> further includes a heat dissipation filler <NUM>. The heat dissipation filler <NUM> is filled in the gap to perform heat transfer, and converts gas heat conduction in the gap part into solid heat conduction, to improve heat transfer efficiency. It should be noted that, that the heat dissipation filler <NUM> is a hard solid structure is not defined by the solid heat conduction herein. The heat dissipation filler <NUM> may be deformable silicone grease.

It may be understood that a quantity of electronic components <NUM> on the circuit board <NUM> is variable, and a form in which the giveaway slot <NUM> corresponds to the electronic component <NUM> may be in a one-to-one correspondence, or one giveaway slot <NUM> may correspond to a plurality of electronic components <NUM>.

<FIG> is a schematic diagram of a structure of the circuit board <NUM> according to an implementation of this application. <FIG> is a schematic diagram of a structure of the circuit board <NUM> according to another implementation of this application.

As shown in <FIG> and <FIG>, the plate body <NUM> further has a metal region at peripheries of the first surface and the second surface. The metal region is located outside the first heat dissipation region <NUM> and the second heat dissipation region <NUM>. The metal region is annular, the first heat dissipation region <NUM> and the second heat dissipation region <NUM> are located inside the metal region, and a specific shape of the metal region may be determined based on a shape of the plate body <NUM>. As shown in <FIG>, the plate body <NUM> of the circuit board <NUM> is square, and the metal region at a periphery of the plate body <NUM> is square annular. The metal region is covered with a metal layer <NUM>, the metal layer <NUM> on the first surface is sealed and connected to the first heat dissipation member <NUM>, and the metal layer <NUM> on the second surface is sealed and connected to the second heat dissipation member <NUM>. Therefore, sealing of the first heat dissipation region <NUM> and the second heat dissipation region <NUM> is strengthened, and waterproof and moisture-proof performance of the first heat dissipation region <NUM> and the second heat dissipation region <NUM> is improved.

The metal region includes an edge part of the plate body <NUM>. When the metal region covers the metal layer <NUM>, the metal layer <NUM> on the first surface is integrally formed with the metal layer <NUM> on the second surface. The metal layer <NUM> can implement electromagnetic shielding on a side of the circuit board <NUM>. In addition, the metal layer <NUM> on the first surface can implement fast heat conduction with the metal layer <NUM> on the second surface, so that heat transfer between the first heat dissipation member <NUM> and the second heat dissipation member <NUM> is fast, and a risk of local heat accumulation in the first heat dissipation member <NUM> and the second heat dissipation member <NUM> is reduced.

As shown in <FIG>, the circuit board <NUM> further has vias <NUM> passing through the first surface and the second surface in the metal region. The metal layer <NUM> may also be disposed in the via <NUM>. On one hand, the metal layer <NUM> in the via <NUM> may implement an electrical connection of interlayers of the circuit board <NUM>, and on the other hand, may further enhance heat conduction efficiency between the first surface and the second surface.

Optionally, the metal layer <NUM> is a copper layer, and covers the metal region in a form of copper deposition. The copper layer has advantages of high thermal conductivity and easy formation.

It may be understood that a specific shape of the metal region may alternatively be determined based on shapes of the first heat dissipation member <NUM> and the second heat dissipation member <NUM>. For example, if the plate body <NUM> of the circuit board <NUM> is square, but the first heat dissipation member <NUM> and the second heat dissipation member <NUM> are circular, and the first heat dissipation member <NUM> and the second heat dissipation member <NUM> may cover the first heat dissipation region <NUM> and the second heat dissipation region <NUM>, the metal region may also be set to be annular. The metal layer <NUM> is covered by using the metal region, and the first heat dissipation member <NUM> and the second heat dissipation member <NUM> are attached to the metal layer <NUM>, so that sealing of the first heat dissipation region <NUM> and the second heat dissipation region <NUM> can be further enhanced.

Refer to <FIG>. When the first heat dissipation member <NUM> is connected to the second heat dissipation member <NUM> by using the bolt <NUM>, the circuit board <NUM> is further provided with a mounting via, and the mounting via is used for the bolt <NUM> to pass through. After passing through the via of the second heat dissipation member <NUM> and the mounting via of the circuit board <NUM>, the bolt <NUM> is threadedly connected to the threaded hole of the first heat dissipation member <NUM>, to implement a connection between the first heat dissipation member <NUM>, the circuit board <NUM>, and the second heat dissipation member <NUM>. The bolt <NUM> passes through the circuit board <NUM> in the first direction. In a plane direction perpendicular to the first direction, relative positions of the circuit board <NUM> and the heat dissipation housing <NUM> may be fastened by using the bolt <NUM>. In this way, relative positions of the first heat dissipation member <NUM>, the circuit board <NUM>, and the second heat dissipation member <NUM> are stable.

The electronic apparatus <NUM> further includes an insulation member <NUM>. The insulation member <NUM> wraps the heat dissipation housing <NUM> to implement environment insulation between the heat dissipation housing <NUM> and the outside of the insulation member <NUM>. The insulation member <NUM> includes the insulation housing <NUM>.

The insulation housing <NUM> has a mounting cavity <NUM>, the heat dissipation housing <NUM> is accommodated in the mounting cavity <NUM>, and the heat dissipation housing <NUM> is wrapped by using the insulation housing <NUM>. A form of wrapping the heat dissipation housing <NUM> by using the insulation member <NUM> may not be a sealed wrap, and different wrapping forms may be selected based on an actual usage of the heat dissipation housing <NUM>. For example, if a diameter of conductive sundries that may occur in a use environment is not less than <NUM>, the entire insulation housing <NUM> wraps the heat dissipation housing <NUM>, and the insulation housing <NUM> may be provided with a hole less than <NUM> at a local position, so that heat dissipation performance of the heat dissipation housing <NUM> can be further improved through gas exchange inside and outside the mounting cavity <NUM>. It can also prevent the conductive sundries from extending into the insulation housing <NUM> and affecting insulation performance of the electronic apparatus <NUM>.

Optionally, the insulation housing <NUM> further includes a heat dissipation channel (not shown in the figure). The heat dissipation channel may be a serpentine channel. When a fluid is injected into the heat dissipation channel, the fluid flows through the heat dissipation channel, and heat of the insulation housing <NUM> may be taken away.

It may be understood that the electronic apparatus <NUM> may further include a gas driving member (not shown in the figure), and the gas driving member is connected to the insulation housing <NUM>. Flowing gas is poured into the heat dissipation channel by using the gas driving member. Alternatively, the electronic apparatus <NUM> may include a liquid-cooled pump, and the liquid-cooled pump flows coolant into the heat dissipation channel, thereby implementing rapid heat dissipation of the insulation housing <NUM>.

Still refer to <FIG>. There is a ventilation gap <NUM> between an inner wall of the mounting cavity <NUM> of the insulation housing <NUM> and the heat dissipation housing <NUM>. Specifically, there is a part of the ventilation gap <NUM> between the inner wall of the mounting cavity <NUM> and the first heat dissipation member <NUM>, and there is also a part of the ventilation gap <NUM> between the inner wall of the mounting cavity <NUM> and the second heat dissipation member <NUM>. If gas flows through the ventilation gap <NUM>, heat dissipation of the first heat dissipation member <NUM> and the second heat dissipation member <NUM> can be accelerated.

The insulation housing <NUM> is provided with a first clamping part <NUM> in the mounting cavity <NUM>, and the heat dissipation housing <NUM> is provided with a second clamping part <NUM>. Relative positions of the insulation housing <NUM> and the heat dissipation housing <NUM> are fastened by clamping the first clamping part <NUM> and the second clamping part <NUM>. Optionally, the first clamping part <NUM> includes an annular groove disposed in the mounting cavity <NUM>, and the second clamping part <NUM> includes an annular protrusion disposed on an outer periphery of the second heat dissipation member <NUM>. The annular protrusion is accommodated in the annular groove, thereby limiting relative movement of the heat dissipation housing <NUM> and the insulation housing <NUM> in the first direction. When the annular protrusion and the annular groove are non-circular annular, the heat dissipation housing <NUM> may be further restricted from rotating around an axis parallel to the first direction in the insulation housing <NUM>.

It may be understood that the insulation housing <NUM> may include a first sub-housing and a second sub-housing. The first sub-housing and the second sub-housing are connected in the first direction, and the first sub-housing and the second sub-housing are combined to form the annular groove. When the heat dissipation housing <NUM> and the insulation housing <NUM> are assembled, the heat dissipation housing <NUM> and the second sub-housing may be assembled first, and then the first sub-housing and the second sub-housing are connected to form the insulation housing <NUM>. The second clamping part <NUM> extends along the outer periphery of the second heat dissipation member <NUM>, and occupies a heat dissipation area of the second outer surface 230b. This reduces impact of the second clamping part <NUM> on heat dissipation performance of the second heat dissipation member <NUM>.

It may be understood that, a connection form between the insulation housing <NUM> and the heat dissipation housing <NUM> may also be set as follows: The first clamping part <NUM> is the annular protrusion disposed on the inner wall of the mounting cavity <NUM>, and the second clamping part <NUM> is the annular groove disposed on the outer periphery of the second heat dissipation member <NUM>. The first clamping part <NUM> is inserted into the second clamping part <NUM>.

In some other embodiments, the insulation member <NUM> may also be an insulation film covering the first outer surface 210b and the second outer surface 230b. The insulation film may be formed on the first outer surface 210b and the second outer surface 230b through pasting, coating, or the like.

It may be understood that in the electronic apparatus <NUM>, the first heat dissipation member <NUM> and the second heat dissipation member <NUM> may be metal heat sinks, and are made of metal materials. Fast heat dissipation of the circuit board <NUM> is implemented by using high thermal conductivity of the metal. Alternatively, the first heat dissipation member <NUM> and the second heat dissipation member <NUM> may be made of other materials with high thermal conductivity, for example, non-metallic materials with high thermal conductivity such as aluminum nitride and boron nitride.

When the electronic apparatus <NUM> is in use, the circuit board <NUM> emits heat in the first heat dissipation region <NUM> and the second heat dissipation region <NUM>, and the heat is directly conducted to the first heat dissipation member <NUM> and the second heat dissipation member <NUM>. Because the first heat dissipation member <NUM> and the second heat dissipation member <NUM> are integrally formed, thermal resistance is low. The first heat dissipation member <NUM> and the second heat dissipation member <NUM> can quickly transfer heat of the first heat dissipation region <NUM> and the second heat dissipation region <NUM> to the first outer surface 210b and the second outer surface 230b. Heat dissipation is further implemented through heat dissipation of the first outer surface 210b and the second outer surface 230b. The heat dissipation of the first outer surface 210b and the second outer surface 230b may be implemented based on air flow in the ventilation gap <NUM>. Further, the first heat dissipation region <NUM> and the second heat dissipation region <NUM>, in which heat is generated, of the circuit board <NUM>, are concentrated locations of the electronic component <NUM> and a printed circuit. Based on the sealing of the first heat dissipation region <NUM> and the second heat dissipation region <NUM> by the first heat dissipation member <NUM> and the second heat dissipation member <NUM>, the electronic component <NUM> and the printed circuit of the circuit board <NUM> can further be protected, and a risk of short circuit of the circuit board <NUM> can be reduced. Sealing the first heat dissipation region <NUM> and the second heat dissipation region <NUM> may be implemented by pressing the outer periphery of the circuit board <NUM>, and the first heat dissipation member <NUM> and the second heat dissipation member <NUM> in the embodiment shown in <FIG>, or may be implemented by completely wrapping the circuit board <NUM> by using the first heat dissipation member <NUM> and the second heat dissipation member <NUM> in embodiments shown in <FIG> and <FIG>. On a basis that the first heat dissipation member <NUM> and the second heat dissipation member <NUM> dissipate heat and seal the circuit board <NUM>, the heat dissipation housing <NUM> wraps the insulation housing <NUM> to improve insulation performance of the electronic apparatus <NUM>, thereby ensuring normal running of the electronic apparatus <NUM>.

By selecting materials of the first heat dissipation member <NUM> and the second heat dissipation member <NUM>, heat dissipation effect of the electronic apparatus <NUM> may be further adjusted. Based on different materials having different thermal conductivity, heat transfer efficiency of the first heat dissipation member <NUM> and the second heat dissipation member <NUM> is adjusted.

Claim 1:
An electronic apparatus (<NUM>), comprising:
a circuit board (<NUM>) having a first surface and a second surface opposite to each other, wherein a first heat dissipation region (<NUM>) is provided on the first surface and a second heat dissipation region (<NUM>) is provided on the second surface;
a heat dissipation housing (<NUM>), comprising a first heat dissipation member (<NUM>) and a second heat dissipation member (<NUM>); and
an insulation member (<NUM>), wrapping the heat dissipation housing (<NUM>), wherein
the first heat dissipation member (<NUM>) has a first heat dissipation surface (210a), and the first heat dissipation surface (210a) is in direct contact with the first heat dissipation region (<NUM>);
the second heat dissipation member (<NUM>) is connected to the first heat dissipation member (<NUM>), the second heat dissipation member (<NUM>) has a second heat dissipation surface (230a), and the second heat dissipation surface (230a) is in direct contact with the second heat dissipation region (<NUM>); and
the first heat dissipation region (<NUM>) and the second heat dissipation region (<NUM>) are sealed by using the first heat dissipation member (<NUM>) and the second heat dissipation member (<NUM>).