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Switch unit with ventilation

A technology for switching devices and electrical switches, which is applied in cooling/ventilation devices, electrical switches, electromechanical devices, etc., and can solve problems such as thermal deformation of the device shell, affecting the reliability of electrical switching devices, and shortening the life of related components.

Inactive Publication Date: 2007-01-10
ELECTRISCHE APPNFAB CAPAX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the latter case, the problem arises because the current is higher at the lower voltage, which generally results in higher heat dissipation
[0006] Heat dissipation affects the reliability of electrical switching devices, can shorten the life of related components and can cause thermal deformation of the device housing
[0007] To prevent these problems, these parts are sized for high power, so they occupy a relatively large space

Method used

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  • Switch unit with ventilation
  • Switch unit with ventilation
  • Switch unit with ventilation

Examples

Experimental program
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Embodiment Construction

[0026] figure 1 A switching device is shown, which is generally designated by reference numeral 1 . The switchgear comprises a housing 2 in which a number of components, including heat sinks, are placed. The button 3 is arranged in a manner known per se on the front side of the housing, and a handle 4 of a pole change switch is arranged above the button.

[0027] A cooling plate 5 is provided on the housing 2 side, and an opening 6 is provided in the cooling plate 5 , and a fan unit 7 is provided on the opening 6 . The fan unit 7 comprises a combination of an electric motor and an impeller. The electric motor is not shown in this figure since it is placed in the housing of the fan unit 7 . The impeller 8 is placed inside the fan housing 7 . On both sides of the opening 6 , raised portions 9 are arranged on the cooling plate, and the fan unit 7 is fixed on the raised portions 9 by means of screws 10 .

[0028] It is obvious that many other possible fixing means can be appl...

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PUM

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Abstract

The invention relates to a switch unit for an electric tool, wherein the switch unit comprises heat-dissipating components, wherein the switch unit comprises a fan, which is adapted to cool the heat-dissipating components. The fan will herein generate an airflow which is guided via the relevant components. The heat developed in these components can be discharged so that the relevant components, even in the case of high power, can be given small dimensions. According to a particular preferred embodiment, the heat-dissipating components are thermally coupled to a cooling body, and the fan is adapted to cool the cooling body.

Description

technical field [0001] The present invention relates to an electrical switchgear for an electric tool, wherein the switchgear includes a heat dissipation member. Background technique [0002] Such switching devices are generally known. [0003] They form eg a component of electric tools, especially electric tools in which the power of a (main) electric motor incorporated in the tool has to be controlled. Such power tools include - but are not exclusive - drill presses, sawing machines, and the like. [0004] The switching device here comprises components that convert electrical energy into heat during operation of these components. These components include semiconductors, resistors, etc. [0005] This problem occurs in mains powered tools, but also to a greater extent in battery powered tools. In the latter case, the problem arises because the current is higher at lower voltages, which generally results in higher heat dissipation. [0006] Heat dissipation affects the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/06H01H9/52H02K9/04
CPCH01H9/52H01H9/061
Inventor 威廉·约瑟夫·洛德韦克·玛丽·吉斯伦斯·彼得斯
Owner ELECTRISCHE APPNFAB CAPAX