Proportional valve and gas water heater

Abstract

The invention discloses a proportional valve and a gas water heater. The proportional valve comprises a valve body, a valve plate and a driving mechanism, wherein a circulation opening is arranged in the valve body, the valve plate can rotate in order to move between shielding of the circulation opening and opening of the circulation opening, and the driving mechanism is connected to the valve plate and drives the valve plate to rotate. The proportional valve drives the valve plate to rotate through the driving mechanism in order to open or close the circulation opening. When the valve plate rotates and shields the circulation opening, the proportional valve is closed at the moment, when the valve plate rotates and staggers the circulation opening, the proportional valve is opened at the moment, and in the process that the valve plate opens or closes the circulation opening, the valve plate abuts against the circulation opening all the time and slides at the circulation opening; and compared with a conventional suspension type valve spool, the valve plate is not affected by gas pressure and electromagnetic force, correspondingly noise is not generated, the opening degree of the valve is kept constant, and the requirement for precise temperature control of the gas water heater is met. According to the gas water heater, the gas flow is adjusted through the proportional valve, so that the water temperature of the gas water heater is constant.

Description

technical field [0001] The invention relates to a proportional valve and a gas water heater. Background technique [0002] At present, there are three types of proportional valves commonly used in wall-hung boilers, namely moving magnetic core proportional valves, moving coil proportional valves and moving iron core proportional valves. These three proportional valves all use electromagnetic force as the driving source. If the current fluctuates, the performance will be unstable and it will be difficult to achieve precise control of the gas flow. Moreover, the spool of the electromagnetic proportional valve is a suspended structure, which is prone to gas shock. This is because the valve stem connected to the valve core is jointly affected by the gas pressure and electromagnetic force, which causes the floating valve stem to vibrate irregularly, resulting in noise and unstable valve opening of the proportional valve. As far as the electromagnetic proportional valve is conce...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a proportional valve and a gas water heater to overcome the defect that the electromagnetic proportional valve in the prior art is prone to gas shock phenomenon.

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