Dish washing machine and control circuit thereof

Abstract

The invention discloses a dish washing machine and a control circuit thereof. The control circuit comprises a washing pump direct current motor for the dish washing machine; a transformer for performing step-down conversion on inputted first alternating current to output second alternating current; a rectifier bridge, wherein a first input end of the rectifier bridge is connected with one end of asecondary winding of the transformer; a first output end of the rectifier bridge is connected with one end of the direct current motor; a second input end of the rectifier bridge is connected with the other end of the secondary winding of the transformer and is connected to the other end of the direct current motor through a second controllable switch; a second output end of the rectifier bridgeis connected to the other end of the direct current motor through a first controllable switch; and the rectifier bridge is used for performing rectifying conversion on the second alternating current so as to output the direct current and supply the direct current to the direct current motor; and a control module used for controlling the first controllable switch and the second controllable switch,so that the direct current motor can operate at a first rotating speed and a second rotating speed respectively, and the double-speed washing of the dish washing machine is realized, thus the noise of the dish washing machine is reduced, and meanwhile the loading space of the dish washing machine is improved.

Description

technical field [0001] The invention relates to the technical field of kitchen appliances, in particular to a control circuit of a dishwasher and a dishwasher. Background technique [0002] The washing pump of the dishwasher in the related art usually uses a single-phase single-speed AC motor. However, due to the low efficiency of the single-phase single-speed AC motor, it is larger in size, requires a larger installation space, requires more consumables, and costs more, and the speed of the single-phase single-speed AC motor cannot be adjusted, that is, it cannot be used for dishwashers. The flow and pressure are adjusted, resulting in high energy consumption and high noise of the dishwasher. [0003] In order to reduce the noise of the dishwasher, related technologies have proposed a technical solution of adding a large amount of noise-reducing damping materials and sound-insulating materials to the dishwasher. However, the existing problem is that the cost of the dishwas...

AI Technical Summary

Problems solved by technology

However, due to the low efficiency of the single-phase single-speed AC motor, it is larger in size, requires a larger installation space, requires more consumables, and costs more, and the speed of the single-phase single-speed AC motor cannot be adjusted, that is, it cannot be used for dishwashers. The flow and pressure are adjusted, resulting in high energy consumption and loud noise of the dishwasher

[0003] In order to reduce the noise of the dishwasher, related technologies have proposed a technical solution for adding a large amount of noise-reducing damping materials and sound-insulating materials to the dishwasher. However, the existing problem is that the cost of the dishwasher will be further increased.

[0004] In order to meet the user's demand for a large loading space while maintaining the overall installation shape, the related technology also proposes a technical solution for compressing the bottom chassis space of the dishwasher, but the existing problem is that the scope of application is narrow, Cannot be used in regular household dishwashers

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