A method for automatically identifying the position of dual water temperature sensors in a water heater

Abstract

The invention discloses a method for automatically identifying positions of double water temperature sensors in a water heater. The manner that a microcontroller, a detection circuit and the two watertemperature sensors are combined is adopted, water temperature values of the two water temperature sensors are detected to be compared, the two water temperature values are determined according to comparative results to correspond the upper water temperature value and the lower water temperature value, and the positions of the two water temperature sensors can be determined; the upper water temperature value is displayed on a displayer, a user can conveniently know the hot water temperature at an outlet of a pressure bearing water tank, and the lower water temperature value enables the microcontroller to conduct water temperature heating control over the pressure bearing water tank through the heater; and in the installing process, line distinguishing connection does not need to be carried out on the positions of the two water temperature sensors, appearance distinguishing does not need to be carried out on the two water temperature sensors, automatic identification can be achieved onthe positions of the two water temperature sensors, the production and manufacturing operation on the water heater can be simplified, and damage caused by connection errors of the two water temperature sensors to the water heater is avoided.

Description

technical field [0001] The invention relates to a method for automatically identifying the positions of dual water temperature sensors in a water heater, belonging to the technical field of water heater temperature measurement. Background technique [0002] For water heaters using pressurized water tanks, it mainly relies on the water pressure of the water pipe to realize automatic water replenishment. Since water has the characteristic that its density decreases with the increase of water temperature when it is above 5°C, heat convection will be formed during the heating process of water, that is, hot water floats up and cold water sinks, so the general water heater design will take advantage of this. The phenomenon adopts the method of water inlet from the lower part of the water tank and water outlet from the upper part, so that the hot water is pushed by the cold water continuously replenished at the bottom to flow out from the upper outlet, so as to realize full use of ...

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Problems solved by technology

[0004] For the above water heaters with dual water temperature sensors, the upper sensor and the lower sensor have their own independent functions; therefore, the upper sensor needs to be connected to the hot water temperature display device through wires to display the water temperature at the water outlet, while the lower sensor is connected through wires It is connected with the controller to control the water temperature to ensure sufficient hot water in the whole tank; if the circuits of the two water temperature sensors are mixed or connected in wrong positions during installation or maintenance, it will result in wrong display of water temperature and failure to heat The problem of water, for some water heaters with separate heaters in the upper part of the water tank for rapid heating according to the upper water temperature, there will be accidents such as damage to the water tank due to loss of correct water temperature feedback

In order to avoid this problem, it is usually controlled by production process management and operator experience during the production or maintenance of water heaters. Although this reduces the probability of errors, it still cannot prevent the occurrence of problems.

Another method is to use two different water temperature sensors, such as distinguishing them by color, shape of connectors, etc., to make them easier to identify or unable to connect incorrectly, which is a step closer to solving this problem, but this The method increases the types of product accessories, and because it still needs to be distinguished during operation, it is not obvious enough to improve the operation efficiency

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