Control device for gas water heater, gas water heater and calculating method for water flow of gas water heater

Abstract

The invention discloses a control device for a gas water heater, the gas water heater and a calculating method for the water flow of the gas water heater. The control device comprises a front ultrasonic simulation end, a time-to-digital converter, a microprocessor as well as a first ultrasonic sensor and a second ultrasonic sensor which are oppositely arranged on two sides of a water inlet pipe of the water heater; the front ultrasonic simulation end is in controlled connection with the first ultrasonic sensor and the second ultrasonic sensor and is connected with the time-to-digital converter; and the microprocessor is connected with the front ultrasonic simulation end and the time-to-digital converter. With the control device, the obtained accuracy of the water flow can be improved, and the service life of the water heater can be prolonged.

Description

technical field [0001] The invention relates to the technical field of gas water heaters, in particular to a control device for a gas water heater, a gas water heater and a calculation method for water flow thereof. Background technique [0002] Gas water heaters are one of the household appliances commonly used in people's daily life. During use, in order to ensure the user's experience and safety, it is necessary to ensure that the outlet water temperature of the water heater is stable. Usually, the outlet water temperature is controlled by the control device of the water heater to control the supply of gas according to the water flow in the water inlet pipe. Most of the existing gas water heater control devices obtain the water flow through the water flow sensor. The water flow sensor is mainly composed of a copper valve body, a water flow rotor assembly, a steady flow assembly and a Hall element. When water flows through the rotor assembly, the magnetic rotor rotates , ...

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Problems solved by technology

[0003] However, the inventor found that the prior art has at least the following disadvantages in the process of implementing the present invention. When water flows through the water inlet pipe, it will touch the magnetic rotor and other components in the water flow sensor. In the long run, the water flow sensor will be scaled and rusted , which will affect the rotational speed generated when the water flows through the magnetic rotor, which will lead to errors in the output of the Hall sensing element, so the accuracy of the obtained water flow is low, and the service life of the gas water heater is shortened

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