PCB heat dissipation structure of dust collector

Abstract

The utility model discloses a PCB heat dissipation structure of a dust collector. The PCB heat dissipation structure comprises a fan shell, a fan assembly and a PCB. A relatively-closed air outlet cavity is formed in the fan shell, the fan assembly is installed in the fan shell, and an outlet of the fan assembly is communicated with the air outlet cavity. The PCB is fixedly installed on the outer wall of the fan shell and comprises a board body, a cooling fin connected to the board body and a silicon controlled rectifier arranged on the cooling fin, the cooling fin comprises a cooling part stretching into the air outlet cavity, and an insertion opening is correspondingly formed in the fan shell. According to the utility model, the structure is simple and reasonable, the radiating fins on the PCB extend into the air outlet cavity, so that air blown out when the fan assembly works can quickly take away heat on the radiating fins, the silicon controlled rectifier can be kept in a relatively stable working temperature range, and the working stability of the PCB is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of household electrical appliances, in particular to a PCB board heat dissipation structure of a vacuum cleaner. Background Art

[0002] A vacuum cleaner is a common household appliance, which can be divided into vertical, horizontal and portable types according to its structure. The working principle of a vacuum cleaner is: using an electric motor to drive the blades to rotate at high speed, generating negative air pressure in a sealed shell to absorb dust. Existing vacuum cleaners mainly include a shell, a fan assembly and a PCB board, wherein the fan assembly is used to provide suction airflow, the shell is used to guide the flow of suction airflow, and the PCB board is used to control the operation of the fan assembly. However, during the operation of the vacuum cleaner, the temperature of the PCB board will rise sharply, especially the temperature of the thyristor is higher. If the PCB board and the thyristor work in a high temperature state for a long time, it will seriously affect the service life and working performance of the PCB board and the thyristor. Therefore, it is very necessary to design a structure that can continuously dissipate heat to the PCB board and the thyristor during the operation of the vacuum cleaner. Utility Model Content

[0003] The utility model aims to overcome the defects in the prior art and provides a PCB board heat dissipation structure of a vacuum cleaner, wherein the heat sink on the PCB board has a heat dissipation portion extending into an air outlet cavity, so that the wind blown out by the fan assembly in the air outlet cavity when working can quickly take away the heat on the heat sink to reduce the heat of the PCB board and the thyristor, so that the PCB board and the thyristor can always be in a relatively stable temperature range, thereby ensuring the working stability of the PCB board.

[0004] To achieve the above-mentioned purpose, the utility model provides a PCB board heat dissipation structure of a vacuum cleaner, comprising a fan housing, a fan assembly and a PCB board;

[0005] The fan housing is provided with a relatively closed air outlet cavity, the fan assembly is installed in the fan housing and its outlet is connected to the air outlet cavity;

[0006] The PCB board is fixedly mounted on the outer wall of the fan housing, and includes a board body, a heat sink connected to the board body, and a thyristor arranged on the heat sink. The heat sink includes a heat dissipation portion extending into the air outlet cavity, and a socket is correspondingly arranged on the fan housing.

[0007] It is further configured as follows: the fan housing comprises a dust chamber component and an outer wind cover which are matched to form an air outlet chamber, and the fan assembly is limitedly clamped between the dust chamber component and the outer wind cover.

[0008] It is further configured as follows: the dust chamber is a thin shell structure with an open upper end, the inlet of the fan assembly is arranged on its front end, and a first air outlet structure connected to the inlet of the fan assembly is correspondingly arranged on the rear wall of the dust chamber.

[0009] The outer hood is further configured as follows: the outer hood is a thin shell structure with an open front end, the outer hood is internally structured with a partition plate extending forward from the rear wall thereof to separate the air outlet cavity into an upper cavity and a lower cavity, the front end of the partition plate is spaced apart from the rear wall of the dust chamber to form a communication gap connecting the upper cavity and the lower cavity, and the rear wall of the outer hood is correspondingly provided with a second air outlet structure connected to the upper cavity;

[0010] The fan assembly is correspondingly installed in the lower chamber.

[0011] It is further configured that: the outlet of the fan assembly is correspondingly arranged on the peripheral wall within the projection range of the partition plate.

[0012] It is further configured that: a sealing member is provided between the heat sink and the socket.

[0013] Compared with the prior art, the utility model has a simple and reasonable structure. The heat sink on the PCB board extends into the air outlet cavity and the thyristor is arranged on the heat sink. In this way, the wind blown out by the fan assembly can quickly take away the heat on the heat sink, so that the PCB board and the thyristor can operate within a relatively stable temperature range, thereby ensuring the service life and working stability of the PCB board and the thyristor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a PCB board heat dissipation structure of a vacuum cleaner of the utility model;

[0015] Figure 2 It is a schematic diagram of the vertical cross-section structure of the PCB board heat dissipation structure;

[0016] Figure 3 It is a schematic diagram of the separation structure of the PCB board heat dissipation structure;

[0017] Figure 4 It is a schematic diagram of the structure of the outer wind hood.

[0018] The following reference numerals are marked on the drawings in conjunction with the drawings:

[0019] 100, dust chamber; 110, first air outlet structure; 200, outer air cover; 210, partition plate; 220, second air outlet structure; 230, socket; 300, fan assembly; 310, inlet; 320, outlet; 400, PCB board; 410, board body; 420, heat sink; 421, heat dissipation part; 430, thyristor; A, air outlet chamber; B, upper chamber C, upper chamber. DETAILED DESCRIPTION

[0020] A specific implementation of the present utility model is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present utility model is not limited by the specific implementation mode.

[0021] The utility model discloses a PCB board heat dissipation structure of a vacuum cleaner. Figure 1 and Figure 2 As shown, it includes a fan casing, a fan assembly 300 and a PCB board 400, wherein a relatively closed air outlet cavity A is arranged inside the fan casing, the fan assembly 300 is installed in the fan casing and its outlet 320 is connected with the air outlet cavity A, so that the air outlet cavity A of the fan casing can guide the wind blown out by the fan assembly 300 for discharge; the PCB board 400 is fixedly installed on the outer wall of the fan casing, and is used to control the operation of the fan assembly 300.

[0022] In this embodiment, if Figure 2 and Figure 3 As shown, the fan housing includes a dust chamber 100 and an outer wind hood 200 which are matched to form an air outlet chamber A, and the fan assembly 300 is limitedly clamped between the dust chamber 100 and the outer wind hood 200; wherein the dust chamber 100 is a thin shell structure with an open upper end, and the open end of the dust chamber 100 is used to place a storage container for collecting garbage, and the inlet 310 of the fan assembly 300 is arranged on the front end and presses against the rear wall of the dust chamber 100, and the rear wall of the dust chamber 100 is correspondingly provided with a first air outlet structure 110 which is connected to the inlet 310 of the fan assembly 300; the outer wind hood 200 is a thin shell structure with an open front end, and the front opening of the outer wind hood 200 is connected to the outer edge of the rear wall of the dust chamber 100, and the two are connected by snaps or screws to cooperate to form a relatively closed air outlet chamber A; preferably, Figure 4 As shown, the outer air hood 200 is constructed with a partition plate 210 extending forward from its rear wall to divide the air outlet chamber A into an upper chamber C and a lower chamber B. The front end of the partition plate 210 is spaced apart from the rear wall of the dust chamber 100 to form a connecting gap connecting the upper chamber C and the lower chamber B. The rear wall of the outer air hood 200 is provided with a second air outlet structure 220 corresponding to the upper chamber C, and the fan assembly 300 is correspondingly installed in the lower chamber B. When the fan assembly 300 is working, the airflow path in the vacuum cleaner is: dust chamber 100→first air outlet structure 110→inlet 310 of fan assembly 300→outlet 320 of fan assembly 300→lower chamber B→connecting gap→upper chamber C→second air outlet structure 220.

[0023] In the above scheme, preferably Figure 2As shown, the outlet 320 of the fan assembly 300 is correspondingly arranged on the annular wall within the projection range of the partition plate 210, so that the airflow blown out by the fan assembly 300 needs to bypass the partition plate 210 to enter the upper chamber C for discharge, which can effectively reduce the working noise of the vacuum cleaner.

[0024] In this embodiment, if Figure 1 , Figure 2 and Figure 3 As shown, the PCB board 400 is fixedly mounted on the top wall of the outer wind cover 200, and includes a plate body 410, a heat sink 420 connected to the plate body 410, and a thyristor 430 arranged on the heat sink 420; specifically: the heat sink 420 is a right-angle bending structure, the horizontal portion of which is connected to the plate body 410 and the thyristor 430 is fixedly arranged on the horizontal portion, and the vertical portion thereof extends downward through the top wall of the outer wind cover 200 to extend into the upper chamber C to form a heat dissipation portion 421, and the top wall of the outer wind cover 200 corresponds to A socket 230 is provided and a seal is provided between the socket 230 and the heat sink 420, so that the wind blown out by the fan assembly 300 can act on the heat sink 420 to quickly take away the heat on the heat sink 420, so as to reduce the temperature of the PCB board 400 and the thyristor 430, so that the PCB board 400 and the thyristor 430 can maintain operation within a relatively stable temperature range, thereby ensuring the service life and working stability of the PCB board 400 and the thyristor 430.

[0025] Compared with the prior art, the utility model has a simple and reasonable structure. The heat sink on the PCB board extends into the air outlet cavity and the thyristor is arranged on the heat sink. In this way, the wind blown out by the fan assembly can quickly take away the heat on the heat sink, so that the PCB board and the thyristor can operate within a relatively stable temperature range, thereby ensuring the service life and working stability of the PCB board and the thyristor.

[0026] The above disclosure is only an embodiment of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A PCB board heat dissipation structure for a vacuum cleaner, characterized in that: Including fan housing, fan assembly and PCB board; The fan housing is provided with a relatively closed air outlet cavity, the fan assembly is installed in the fan housing and its outlet is connected to the air outlet cavity; The PCB board is fixedly mounted on the outer wall of the fan housing, and includes a board body, a heat sink connected to the board body, and a thyristor arranged on the heat sink. The heat sink includes a heat dissipation portion extending into the air outlet cavity, and a socket is correspondingly arranged on the fan housing.

2. The PCB heat dissipation structure of a vacuum cleaner according to claim 1, characterized in that: The fan housing comprises a dust chamber component and an outer wind cover which are matched to form an air outlet chamber, and the fan assembly is limitedly clamped between the dust chamber component and the outer wind cover.

3. The PCB heat dissipation structure of a vacuum cleaner according to claim 2, characterized in that: The dust chamber is a thin shell structure with an open upper end, the inlet of the fan assembly is arranged on the front end thereof, and a first air outlet structure connected to the inlet of the fan assembly is correspondingly arranged on the rear wall of the dust chamber.

4. The PCB heat dissipation structure of a vacuum cleaner according to claim 2, characterized in that: The outer wind hood is a thin shell structure with an open front end, and a partition plate extending forward from the rear wall of the outer wind hood is arranged inside the outer wind hood to divide the air outlet cavity into an upper chamber and a lower chamber, and the front end of the partition plate is arranged at a distance from the rear wall of the dust chamber to form a communication gap connecting the upper and lower chambers, and a second air outlet structure connected to the upper chamber is correspondingly arranged on the rear wall of the outer wind hood; The fan assembly is correspondingly installed in the lower chamber.

5. The PCB heat dissipation structure of a vacuum cleaner according to claim 4, characterized in that: The outlet of the fan assembly is correspondingly arranged on the peripheral wall within the projection range of the partition plate.

6. The PCB heat dissipation structure of a vacuum cleaner according to claim 1, characterized in that: A sealing member is arranged between the heat sink and the socket.

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