Washing machine and its overvoltage protection circuit
An overvoltage protection circuit and washing machine technology, applied in the field of washing machines, can solve problems such as increased overvoltage, damage to switching power supply modules, failure of washing machines, etc., and achieve the effect of improving reliability
Active Publication Date: 2019-07-19
WUXI FILIN ELECTRONICS CO LTD
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- Application Information
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Problems solved by technology
However, when the overvoltage occurs during the working process of the washing machine, the user is generally not on site, so it is impossible to cut off the power supply of the washing machine in time according to the alarm prompt
This will cause the overvoltage to continue to increase. Once the overvoltage exceeds the tolerance range of the switching power supply module of the washing machine, the switching power supply module will be damaged due to the overvoltage, which will cause the washing machine to malfunction.
Method used
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[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0025] The overvoltage protection circuit of the washing machine and the washing machine proposed by the embodiments of the present invention are described below with reference to the accompanying drawings.
[0026] figure 1 is a circuit diagram of an overvoltage protection circuit of a washing machine according to an embodiment of the present invention. Such as figure 1 As shown, the overvoltage protection circuit is connected between the AC power supply AC and the switching power supply module 100 of the washing machine, incl...
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The invention discloses a washing machine and an overvoltage protection circuit thereof. The overvoltage protection circuit is connected between an alternating current power supply and a switching power supply module of the washing machine. The overvoltage protection circuit comprises a controllable switch unit, an overvoltage detection unit and a trigger control unit, wherein the controllable switch unit is connected to the alternating current power supply and is used for controlling the alternating current power supply input into the washing machine; the overvoltage detection unit is used for detecting whether the voltage of the alternating current power supply exceeds the preset voltage; and the trigger control unit is used for controlling the controllable switch unit to cut off the power supply of the alternating current power supply to the washing machine when the voltage of the alternating current power supply exceeds the preset voltage. The overvoltage protection circuit can cut off the power supply of the alternating current power supply to the washing machine when the alternating current power supply exceeds the preset voltage, so that the damage to the switching power supply module of the washing machine due to overvoltage can be avoided, and thus the washing machine can be effectively protected.
Description
technical field [0001] The invention relates to the technical field of washing machines, in particular to a washing machine and an overvoltage protection circuit of the washing machine. Background technique [0002] During the working process of the power system, due to sudden changes in the circuit state and electromagnetic state, overvoltage may occur, that is, the root mean square value of the AC voltage under the power frequency rises, exceeding 10% of the rated value, and the duration is greater than 1 minute long-term voltage fluctuation phenomenon. The overvoltage generally causes damage to household appliances, such as washing machines. [0003] In related technologies, when the washing machine is working, the controller of the washing machine will continuously detect the working voltage of the washing machine. Once the working voltage is overvoltage, the controller will control the washing machine to stop working and give an alarm. However, when an overvoltage sit...
Claims
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IPC IPC(8): H02H3/20D06F37/42
CPCD06F37/42H02H3/20
Inventor 冯庆山
Owner WUXI FILIN ELECTRONICS CO LTD