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Switching power supply circuit, air conditioning equipment and refrigerator

A switching power supply circuit, switching power supply technology, applied in the direction of circuit devices, emergency protection circuit devices, electrical components, etc., can solve the problem that the switching power supply circuit cannot be over-current protected, and achieve the effect of hardware over-current protection

Active Publication Date: 2020-10-02
GUANGDONG MEIZHI COMPRESSOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this application is to provide a switching power supply circuit, an air conditioner and a refrigerator, aiming to solve the problem that the traditional switching power supply circuit cannot perform overcurrent protection

Method used

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  • Switching power supply circuit, air conditioning equipment and refrigerator
  • Switching power supply circuit, air conditioning equipment and refrigerator
  • Switching power supply circuit, air conditioning equipment and refrigerator

Examples

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Embodiment Construction

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0032] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be 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.

[0033] It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and oth...

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PUM

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Abstract

The invention discloses a switching power supply circuit, air conditioning equipment and a refrigerator. The switching power supply circuit comprises a driving circuit, a switching power supply module, a detection circuit and an overcurrent protection circuit. The driving circuit generates a driving signal according to the control signal when the control signal is accessed; the switching power supply module converts the input voltage according to the driving signal so as to output a working voltage, wherein the working voltage is used for driving a load; the detection circuit detects a main switch conduction current of the switching power supply module to generate a detection current; the overcurrent protection circuit compares the detection current with a threshold current and generates adisability signal according to a comparison result; the driving circuit stops generating the driving signal according to the disability signal so as to enable the switching power supply module to stop generating the main switch conduction current and the working voltage; and therefore, hardware over-current protection of the load is realized.

Description

technical field [0001] The application belongs to the field of power supplies, and in particular relates to a switching power supply circuit, an air conditioner and a refrigerator. Background technique [0002] In today's electronic products, semiconductor devices are widely used, and one of the most notable characteristics of semiconductor devices is that they generate heat significantly under high current conditions, causing the temperature of components to rise sharply. Working at high temperatures for a long time will not only reduce the temperature of semiconductor devices life, and will greatly reduce the reliability of electronic product operation. Therefore, it is necessary to consider the heat dissipation problem of the heat-generating electronic products. To control the temperature of heating electronic products to a certain range, DC fans are often used for air cooling and heat dissipation. Due to the wide variety of electronic products, the application occasion...

Claims

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Application Information

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IPC IPC(8): H02H3/08H02H3/087H02H7/12
CPCH02H3/08H02H3/087H02H7/1203H02H7/1213
Inventor 刘锦晨任新杰
Owner GUANGDONG MEIZHI COMPRESSOR
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