Water level switch

Abstract

The invention discloses a water level switch, which comprises a seal cover and a base covered on the seal cover, wherein a sealed cavity is arranged between the seal cover and the base, and an air inlet is arranged outside the seal cover; a membrane is arranged in the cavity, and a pressure cavity is formed between the membrane and the inner wall of the seal cover; one end of the air inlet is communicated with a water tank of a washing machine, and the other end of the air inlet is communicated with the pressure cavity; a reed and an electrode plate which are positioned in the cavity are arranged on the base, and a contact is arranged on the reed; another contact is arranged on the electrode plate, and a mandril for pushing the reed to allow the contact on the reed to be closed is arranged on the membrane; and the reed is connected with an inserting piece extending out of the base, and a reset mechanism matched with the mandril to allow the contact on the reed to be opened and a gear shifting mechanism are also arranged on the base. The water level switch does not need to be directly contacted with the liquid level to be tested, and has the advantages of simple structure, low cost, high measuring precision, safe and reliable work, wide application range and no water source environment limitation.

Description

technical field [0001] The invention relates to a water level switch applied to a washing machine. Background technique [0002] The structure of the water level switch currently used in the washing machine is relatively complicated, and it needs to be in direct contact with the liquid surface to be measured, which is easily restricted by the water source environment and scale formation. The measurement accuracy of the water level switch is low, and the working reliability is low. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a water level switch that does not directly contact with the liquid surface to be measured, and has high measurement accuracy and operational reliability. [0004] In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a water level switch, used to detect the water level signal of the washing machine, comprising a cover and a b...

AI Technical Summary

Problems solved by technology

[0002] The structure of the water level switch currently used in the washing machine is relatively complicated, and it needs to be in direct contact with the liquid surface to be measured, which is easily restricted by the water source environment and scale formation, the measurement accuracy of the water level switch is low, and the working reliability is low.

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