WO2021017865A1

WO2021017865A1 - Pcba and electric flame cooker

Info

Publication number: WO2021017865A1
Application number: PCT/CN2020/102391
Authority: WO
Inventors: 卢驭龙
Original assignee: 卢驭龙
Priority date: 2019-07-26
Filing date: 2020-07-16
Publication date: 2021-02-04
Also published as: CN211019721U

Abstract

Disclosed in the present application is a PCBA (700), comprising a metal housing (1) provided with an accommodation cavity (11) and a printed circuit board (2) disposed in the accommodation cavity (11) and connected to the metal housing (1); an air inlet (12) and an air outlet (13) are formed on the metal housing (1), are respectively located at two opposite ends of the metal housing (1), and each communicate with the accommodation cavity (11); and a heat dissipation fan (3) is mounted in the air inlet (12) and/or the air outlet (13). The printed circuit board (2) is mounted in the accommodation cavity (11) of the metal housing (1). The circumference of the printed circuit board (2) is has a shielding effect on the metal housing (1). Since high voltage generated by a transformer of an electric flame cooker is shielded by the metal housing (1), circuits and components on the printed circuit board (2) in the metal housing (1) are not affected, which thereby guarantees the normal operation of the PCBA (700).

Description

PCBA components and electric flame stove

This application claims the priority of the Chinese patent application filed at the Chinese Patent Office on July 26, 2019 with the application number 201921202044.7 and the invention title "PCBA assembly and electric flame stove", the entire content of which is incorporated into this application by reference in.

Technical field

This application relates to the field of electric heating, in particular to a PCBA assembly and an electric flame stove.

Background technique

The principle of electric flame cooker is to produce electric flame by high voltage. The inventor found that when electric flame cooker is working, PCBA (Printed Circuit Board +Assembly) The assembly often works unstable, which affects the normal use of the electric flame stove. It cannot normally control the transformer to generate a suitable high voltage, and thus cannot generate the required electric flame.

technical problem

One of the objectives of the embodiments of the present application is to provide a PCBA assembly, which aims to solve the problem that the PCBA assembly in the electric flame cooker is often unstable during operation.

Technical solutions

In order to solve the above technical problems, the technical solutions adopted in the embodiments of this application are:

In a first aspect, a PCBA assembly is provided, which includes a metal casing with a accommodating cavity, and a printed circuit board arranged in the accommodating cavity and connected to the metal casing; on the metal casing An air inlet and an air outlet are opened, the air inlet and the air outlet are respectively located at opposite ends of the metal shell, and the air inlet and the air outlet are both in communication with the accommodating cavity; A cooling fan is installed at the air inlet and/or the air outlet.

Further, the metal casing is provided with a first connection through hole, the printed circuit board is provided with a first threaded hole, and a first connection screw is provided between the printed circuit board and the metal casing, The first connecting screw penetrates the first connecting through hole and is threadedly connected with the first threaded hole.

Further, a mounting block is provided on the metal shell, and the mounting block is provided with a mounting hole.

Further, the metal shell includes a first shell and a second shell connected to the first shell; the second shell and the first shell enclose the containing cavity.

Further, the first housing is provided with a second connecting through hole, the second housing is provided with a second threaded hole, a second connecting screw is provided between the first housing and the second housing, the The second connecting screw penetrates the second connecting through hole and is threadedly connected with the second threaded hole.

Further, the first housing is provided with a first clamping member, and the second housing is provided with a second clamping member that is clamped with the first clamping member.

Further, a wire harness hole is provided on the metal shell.

Further, the metal shell is an aluminum shell.

In a second aspect, an electric flame stove is provided, which includes a chassis, a transformer arranged in the chassis, and the aforementioned PCBA assembly; the PCBA assembly is arranged in the chassis, and the transformer is electrically connected to the PCBA assembly. Connection; The metal shell is provided between the printed circuit board and the transformer.

Further, a connecting wire is provided between the transformer and the printed circuit board, and a metal shielding layer is sheathed on the outside of the connecting wire.

Beneficial effect

The beneficial effects of the PCBA assembly provided by the embodiments of the present application are: because the printed circuit board is installed in the accommodating cavity of the metal shell, the printed circuit board has the shielding effect of the metal shell around the printed circuit board, and the transformer of the electric flame stove produces Due to the shielding of the metal shell, the high voltage cannot affect the circuits and components on the printed circuit board in the metal shell, thereby ensuring the normal operation of the PCBA assembly.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the embodiments or exemplary technical descriptions. Obviously, the drawings in the following description are only for the present application. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of the structure of a PCBA assembly in an embodiment of the application;

2 is a cross-sectional view of the PCBA assembly in the embodiment of the application;

3 is a schematic diagram of the structure of the first housing in the embodiment of the application;

FIG. 4 is a schematic diagram of the internal structure of the cabinet of the electric flame stove in the embodiment of the application;

In the picture:

1. Metal shell; 11. Accommodating cavity; 12. Air inlet; 13. Air outlet; 14. Mounting block; 141. Mounting hole; 15. First housing; 16. Second housing; 17, Second connecting screw 18. Harness hole; 2. Printed circuit board; 3. Cooling fan; 4. First connecting screw; 5. Chassis; 6. Transformer; 700, PCBA assembly.

Embodiments of the invention

In order to make the purpose, technical solutions, and advantages of this application clearer, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the application, and are not used to limit the application.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top" The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply the pointed device Or the element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, "multiple" means two or more than two, unless otherwise specifically defined.

The implementation of this application will be described in detail below in conjunction with specific embodiments.

After many experiments, the inventor found that the reason for the unstable operation of the PCBA assembly is that it is easily affected by the electromagnetic influence of the high voltage generated by the transformer, and thus cannot work stably.

As shown in Figures 1 to 4, an embodiment of the present application proposes a PCBA assembly 700, which includes a metal housing 1 having a accommodating cavity 11, and a print that is arranged in the accommodating cavity 11 and connected to the metal housing 1. The circuit board 2; the metal shell 1 is provided with an air inlet 12 and an air outlet 13. The air inlet 12 and the air outlet 13 are respectively located at opposite ends of the metal shell 1, and the air inlet 12 and the air outlet 13 are both contained The cavity 11 communicates; the air inlet 12 and/or the air outlet 13 are equipped with a cooling fan 3.

In the embodiment of the present application, when the PCBA assembly 700 is applied to an electric flame stove (the air inlet 12 and the air outlet 13 of the PCBA assembly 700 are not facing the transformer 6), the printed circuit board 2 is mounted on the metal shell 1 In the accommodating cavity 11, the printed circuit board 2 has the shielding effect of the metal shell 1. The high voltage generated by the transformer 6 of the electric flame cooker is shielded by the metal shell 1 and cannot be used for printing in the metal shell 1. The circuits and components on the control circuit board 2 have an impact, thereby ensuring the normal operation of the PCBA assembly 700. At the same time, it is also ensured that the circuits and components on the printed circuit board 2 of the PCBA assembly 700 will not affect other electronic components and circuits, so that the electric flame stove can work stably.

At the same time, since the metal casing 1 is provided with an air inlet 12 and an air outlet 13, and the air inlet 12 and/or the air outlet 13 are equipped with a heat dissipation fan 3, the heat dissipation fan 3 can perform the operation in the containing cavity 11 when the PCBA assembly 700 is working. The ventilation effect causes the heat in the accommodating cavity 11 to be radiated outward in time, so as to prevent the local temperature of the PCBA assembly 700 from being too high and affecting the normal operation of the electric flame stove.

Further, please refer to FIG. 2. As another specific implementation of the PCBA assembly 700 provided by the present application, the metal housing 1 is provided with a first connection through hole, and the printed circuit board 2 is provided with a first threaded hole, A first connecting screw 4 is provided between the circuit board 2 and the metal shell 1, and the first connecting screw 4 penetrates the first connecting through hole and is threadedly connected with the first threaded hole. That is, the printed circuit board 2 is fixedly installed on the metal shell 1 by the first connecting screw 4. Of course, in other embodiments, it may also be a detachable connection method such as a snap connection.

Further, referring to FIG. 1, as another specific implementation of the PCBA assembly 700 provided by the present application, a mounting block 14 is provided on the metal housing 1, and the mounting block 14 is provided with a mounting hole 141. The mounting hole 141 on the mounting block 14 facilitates the mounting and fixing of the PCBA assembly 700. For example, when the PCBA assembly 700 is installed in an electric flame stove, it can be fixedly connected to the cabinet 5 of the electric flame stove.

Further, please refer to FIG. 2. As another specific implementation of the PCBA assembly 700 provided by the present application, the metal housing 1 includes a first housing 15 and a second housing 16 connected to the first housing 15; the second housing 16 It is enclosed with the first housing 15 to form an accommodation cavity 11. The metal shell 1 is formed by connecting the first shell 15 and the second shell 16 so that the metal shell 1 can be disassembled to facilitate the installation of the printed circuit board 2 and the replacement and maintenance of components.

Further, referring to FIG. 2, as another specific implementation of the PCBA assembly 700 provided in the present application, the first housing 15 is provided with a second connection through hole, the second housing 16 is provided with a second threaded hole, and the first housing A second connecting screw 17 is provided between 15 and the second housing 16. The second connecting screw 17 penetrates the second connecting through hole and is threadedly connected with the second threaded hole. The first housing 15 and the second housing 16 are connected by the second connecting screw 17, so that quick disassembly and assembly can be realized, which in turn facilitates the quick assembly and disassembly of the printed circuit board 2 and related components.

Further, as another specific implementation of the PCBA assembly 700 provided in the present application, the first housing 15 is provided with a first clamping member, and the second housing 16 is provided with a second card that is connected to the first clamping member.接件. The first clamping member and the second clamping member can be respectively a clamping groove and a clamping protrusion.

Further, referring to FIG. 1, as another specific embodiment of the PCBA assembly 700 provided in the present application, the metal housing 1 is provided with a wire harness hole 18. It is convenient to wire the PCBA assembly 700, for example, to be electrically connected to the transformer 6 in the electric flame cooker.

Further, please refer to FIG. 1, as another specific embodiment of the PCBA assembly 700 provided in the present application, the metal shell 1 is an aluminum shell. The metal shell 1 may be an aluminum shell, which has the characteristics of light weight and good shielding effect.

As shown in FIG. 4, an embodiment of the present application proposes an electric flame stove, which is characterized in that it includes a case 5, a transformer 6 arranged in the case 5, and the PCBA assembly 700 in the above-mentioned embodiment; the PCBA assembly 700 is arranged in In the case 5, the transformer 6 is electrically connected to the PCBA assembly 700; there is a metal shell 1 between the printed circuit board 2 and the transformer 6. During installation, make the metal shell 1 located between the transformer 6 and the printed circuit board 2, and prevent the air inlet 12 or the air outlet 13 from facing the transformer 6, so as to ensure that the metal shell 1 is optimal for the printed circuit board 2. The shielding effect can also heat the PCBA assembly 700 at the same time. Since the internal temperature of the electric flame stove is relatively high during use, the setting of the cooling fan 3 greatly ensures that the PCBA assembly 700 can work stably. It can be understood that the electric flame stove also includes a stove head electrically connected to the transformer 6, and an ion needle on the stove head generates an electric flame.

Further, referring to FIG. 4, as another specific embodiment of the electric flame cooker provided by the present application, a connecting wire is provided between the transformer 6 and the printed circuit board 2, and a metal shielding layer is sheathed on the outside of the connecting wire, and then Avoid the connection line between the transformer 6 and the printed circuit board 2 from being electromagnetically affected by the high voltage generated by the transformer 6.

It is understandable that the solution in another specific implementation manner may be an achievable implementation solution that is further improved on the basis of other embodiments.

Obviously, the above-mentioned embodiments of the present application are only used to clearly illustrate the examples of the present application, and are not intended to limit the implementation manners of the present application. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is unnecessary and impossible to list all the implementation methods here. Any modification, equivalent replacement and improvement made within the spirit and principle of this application shall be included in the protection scope of the claims of this application.

Claims

The PCBA assembly is characterized in that it comprises a metal casing with a accommodating cavity, and a printed circuit board arranged in the accommodating cavity and connected with the metal casing; the metal casing is provided with an air inlet And an air outlet, the air inlet and the air outlet are respectively located at opposite ends of the metal shell, the air inlet and the air outlet are both in communication with the accommodating cavity; the air inlet and/ Or the air outlet is equipped with a cooling fan.
The PCBA assembly according to claim 1, wherein the metal shell is provided with a first connection through hole, the printed circuit board is provided with a first threaded hole, and the printed circuit board is connected to the metal A first connecting screw is arranged between the shells, and the first connecting screw penetrates the first connecting through hole and is threadedly connected with the first threaded hole.
The PCBA assembly according to claim 1, wherein a mounting block is provided on the metal shell, and the mounting block is provided with a mounting hole.
The PCBA assembly according to claim 1, wherein the metal shell comprises a first shell and a second shell connected to the first shell; the second shell is enclosed by the first shell The containing cavity.
The PCBA assembly of claim 4, wherein the first housing is provided with a second connection through hole, the second housing is provided with a second threaded hole, the first housing and the second housing A second connecting screw is provided therebetween, and the second connecting screw penetrates the second connecting through hole and is threadedly connected with the second threaded hole.
The PCBA assembly according to claim 4, wherein the first housing is provided with a first clamping member, and the second housing is provided with a second clamping member that is connected to the first clamping member. Pieces.
The PCBA assembly of claim 1, wherein the metal shell is provided with a wire harness hole.
The PCBA assembly according to any one of claims 1-7, wherein the metal shell is an aluminum shell.
The electric flame stove is characterized by comprising a cabinet, a transformer arranged in the cabinet, and the PCBA assembly according to any one of claims 1-8; the PCBA assembly is arranged in the cabinet, and the transformer It is electrically connected with the PCBA assembly; the metal shell is provided between the printed circuit board and the transformer.
The PCBA assembly and electric flame cooker according to claim 8, wherein a connecting wire is provided between the transformer and the printed circuit board, and a metal shielding layer is sheathed on the outside of the connecting wire.