Electrode type water level switch, water heater and water level detection method thereof

Abstract

The invention discloses an electrode type water level switch, a water heater and a water level detection method thereof. The switch comprises an obtaining device, an electrode (106) and an electrode detection circuit (108); the obtaining device is used for obtaining an alternating weak current signal; the electrode (106) is used for using the alternating weak current signal as a signal source to conduct water level detection; the electrode detection circuit (108) is used for outputting a corresponding water level detection result according to water level detection of the electrode (106). According to the electrode type water level switch, the water heater and the water level detection method thereof, the defects that in the prior art, the degree of electrode corrosion and scaling is nonuniform, the service life is short, and the difficulty of maintenance is big can be overcome, and the advantages of being uniform in degree of electrode corrosion and scaling, long in service life and small in difficulty of maintenance are achieved.

Description

technical field [0001] The invention belongs to the technical field of hot water devices, and in particular relates to an electrode type water level switch, a water heater and a water level detection method thereof. Background technique [0002] With the extensive application of commercial hot water units, the reed switches commonly used in the market are easily stuck by scale, and the application of electrode water level switches is increasing. However, the current electrode type water level switch has problems such as electrode corrosion and scaling unevenness, and the electrode is easy to corrode, which has always troubled users and brought a lot of inconvenience to after-sales maintenance. [0003] For example: most of the electrode-type water level switches used in commercial water heaters or solar water tanks are DC weak current. Because the ions in the water have unidirectional conductivity under DC voltage, the electrons will move in one direction and adsorb to the p...

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Problems solved by technology

[0005] The purpose of the present invention is to address the above defects, to provide an electrode type water level switch, a water heater and a water level detection method thereof, so as to solve the problems of electrode corrosion and uneven scaling of the electrode type water level switch in the prior art, and to reduce scale Effect

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