Drainage system capable of lowering drainage noise of washing machine and control method thereof

Abstract

The invention discloses a drainage system capable of lowering the drainage noise of a washing machine, which comprises a drainage pump, a drainage pump water inlet pipe and a drainage pump water outlet pipe, wherein the drainage pump water inlet pipe and the drainage pump water outlet pipe are arranged on the drainage pump; a water level detection device is arranged between the drainage pump water inlet pipe and the outer bucket of the washing machine; the water level detection device transmits a water level signal to an external controller; and the controller controls the drainage pump to be started and stopped in real time so as to ensure that the inside of the drainage pump is still kept at the full water state in the washing machine dewatering process. The drainage pump can be turned on and off according to the water level height by arranging the water level detection device on the drainage system of the washing machine, vibration noise generated by the washing machine is prevented from being overlaid with half dry adsorption noise of the drainage pump during high-speed dewatering, the noise is scattered, and the noise of the washing machine is lowered. Compared with the prior art, the drainage system has the advantages of simple structure, small noise, high drainage efficiency and low energy consumption.

Description

technical field [0001] The invention relates to the technical field of washing machines, in particular to a drainage system for reducing the drainage noise of the washing machine and a control method for reducing the drainage noise by using the system. Background technique [0002] The washing machine will generate very loud noise during the dehydration process, part of which is due to the semi-dry suction of the drainage pump during the drainage process, resulting in increased noise, which brings a lot of inconvenience to users. Such as figure 1 As shown, the existing washing machine drainage system includes a drainage pump 04. The drainage pump 04 is provided with a drainage pump inlet pipe 04 connected to the outer cylinder of the washing machine, and a drainage pump outlet pipe 02. In the previous drainage process, the drainage pump 04 is normally open. Its drainage principle is: after the drainage program is turned on, the drainage pump 04 will be turned on and off si...

AI Technical Summary

Problems solved by technology

As the water in the outer cylinder decreases, the water 05 in the drain pump 04 will also become less and less, and it will appear as follows: figure 2 In the state shown, only part of the water 05 is in the drain pump 04, and the outlet pipe 02 of the drain pump will suck in part of the air while sucking in the water 05, causing the drain pump 04 to generate a lot of noise, thus affecting the noise of the whole washing machine performance

[0003] In order to solve this problem, the existing washing machine has been improved in structure, but the effect is not obvious. For example, the Chinese patent document CN 1304469A discloses a "washing machine for reducing the noise of the drain pump". A bypass hose is arranged between the tubes. When the water level in the cylinder is lowered, it can circulate the remaining small amount of water in the cylinder, thus reducing the noise of the washing machine's drain pump.

However, due to the recycling of water in this structure, the noise reduction effect is not obvious, and it will increase the energy consumption of the entire drainage process, which is not conducive to energy saving and emission reduction.

[0004] Another example is the Chinese patent document CN 201507484U, which discloses a "low-noise pump casing for a washing machine drainage pump", which is mainly based on the pump casing composed of a pump chamber, a filter chamber and a water outlet, and the pump chamber near the water outlet An explosion-proof hole is added on the end surface of the inner wall of the pump casing between the filter chamber, and when the drainage pump is in the "half water and half air" stage, after the residual water and air in the pump chamber are mixed, under the action of the impeller rotation, it will A part of the residual water "flows back" into the filter chamber through the explosion-proof hole on the inner wall of the pump casing, releasing the periodic pressure explosion generated by the mixture of residual water and air in the pump chamber, thereby reducing the noise of the washing machine drainage pump in the drainage. This structure is not very effective in reducing the noise of the drainage pump

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