Electric water heater controlled by water flow switch

Abstract

An electric water heater controlled by a water flow switch comprises a shell, a water tank, an electric heating tube, a water inlet tube, a water outlet tube, the water flow switch, a gear switch, a button switch and the like, wherein the water flow switch has a water flow pushing structure and consists of a main body, a cover plate, a sealing piece, a pushing piece, a spring or a spring plate, a mounting cover plate, a microswitch, a static contact, a movable contact, a terminal and a pushing pin of the microswitch; a water inlet channel and a water outlet channel are not directly communicated with each other and are separated from each other by the cover plate; when water flows, a circuit is switched on; when the water does not flow, the circuit is switched off; and the water flow switch is required to be matched with the gear switch; and when the water in the water tank is required to be pre-heated, the pre-heating button switch needs to be set.

Description

technical field [0001] The invention relates to an electric water heater controlled by a water flow switch, including a water storage type (including a fast heating type) and a fast heating type electric water heater (including a small kitchen treasure and an electric faucet), and mainly relates to a control method for an electric water heater using a water flow switch. Background technique [0002] At present, there are two control methods for electric water heaters in various countries in the world. One is to use a liquid expansion thermostat to set the temperature in the water tank. , reheating, repeating continuously, when the set temperature is exceeded, the power is cut off, which is called a mechanical control method, and the liquid expansion control requires continuous power supply for 24 hours, wasting energy; when the temperature control fails, it will continue to heat, causing the water heater to explode The other is to use microcomputer chips, relays and other el...

AI Technical Summary

Problems solved by technology

[0002] At present, there are two control methods for electric water heaters in various countries in the world. One is to use a liquid expansion thermostat to set the temperature in the water tank. , reheating, repeating continuously, when the set temperature is exceeded, the power is cut off, which is called a mechanical control method, and the liquid expansion control requires continuous power supply for 24 hours, wasting energy; when the temperature control fails, it will continue to heat, causing the water heater to explode The other is to use microcomputer chips, relays and other electronic components to cooperate with water flow sensors. When the water flow is detected, the electric heating tube is started to work through the relay. This electronic controller has dozens of electronic components and hundreds of contacts. Prone to failure and high cost

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