Pneumatic drain valve and air channel control device thereof

Abstract

The invention discloses a pneumatic drain valve and an air channel control device thereof. A switching body of a switching valve of the pneumatic drain valve is provided with a first air inlet, a second air inlet, a first air outlet and a second air outlet; a switching core of the switching valve is movably arranged in the switching body; one of a half-drain switch and a full-drain switch controlsan air supply source to supply air to the first air inlet so that the switching core moves a first position, communicated with the first air outlet, of the first air inlet, the air flowing out from the first air outlet drives and controls the drain valve to correspondingly perform half drain or full drain; the other one of the half-drain switch and the full-drain switch controls the air supply source to supply air to the second air inlet so that the switching core moves a second position, communicated with the first air outlet and the second air outlet simultaneously, of the second air inlet,the air flowing out from the first air outlet and second air outlet jointly drives and controls the drain valve to correspondingly perform full drain or half drain; the structural layout is more flexible, and the operation is more convenient; the air channel switching can be achieved, and the function is more reliable.

Description

technical field [0001] The invention relates to a pneumatic drainage valve and an air circuit control device thereof. Background technique [0002] The drainage device of the common flushing water tank on the market usually adopts a mechanical opening structure, that is, a direct pressing drainage structure. This structure is generally composed of a pressing driving device (operating device) and a drainage device, and the pressing driving device is limited by the drainage device. As a result, the installation of the operating device is limited. In many applications, the user cannot perform the flushing action very conveniently, and needs to adjust the body position. What an inconvenience. [0003] In order to make full use of the living space, there are currently hidden water tanks hidden in the wall or in the bathroom cabinet. Therefore, the ordinary mechanical opening structure of the drain valve is no longer applicable. The connection between the drain valve and the oper...

AI Technical Summary

Problems solved by technology

[0002] The drainage device of the common flushing water tank on the market usually adopts a mechanical opening structure, that is, a direct pressing drainage structure. This structure is generally composed of a pressing driving device (operating device) and a drainage device, and the pressing driving device is limited by the drainage device. As a result, the installation of the operating device is limited. In many applications, the user cannot perform the flushing action very conveniently, and needs to adjust the body position. What an inconvenience

[0003] In order to make full use of the living space, there are currently hidden water tanks hidden in the wall or in the bathroom cabinet. Therefore, the ordinary mechanical opening structure of the drain valve is no longer applicable. The connection between the drain valve and the operating device must be a flexible linkage connection. The existing wire-controlled drain valve is connected with a wrench by a wire rope, and the wrench can be installed at any position. The full row and half row strokes are controlled by the wrench to realize dual-stage drainage, so that the operating device is no longer limited to the top of the water valve. However, due to the use of The steel wire controls the half-row and full-row strokes of the drain valve. There is friction when the steel wire slides through the plastic sleeve. Moreover, the stroke of the steel wire needs to be precisely controlled, otherwise the function of the wire-controlled dual-speed drain valve will fail or be confused.

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