Water replenishing judging method of water heater

Abstract

The invention relates to a water replenishing judging method of a water heater. The water replenishing judging method of the water heater comprises the following steps: when the water heater is electrified and works, setting a temperature rising value delta T; detecting actual required time t corresponding to a process of increasing the temperature of water in the water heater by the temperature rising value delta T; calculating theoretical required time t corresponding to the process of increasing the temperature of the water in the water heater by the temperature rising value delta T; comparing the actual required time t to the theoretical required time t; if the actual required time t is smaller than the theoretical required time t, determining that the water heater needs water replenishing; and reminding a user. By the method, whether the inside of the water heater is in a dry burning state and whether the water heater needs water replenishing can be quickly and accurately judged, the user is reminded of replenishing water, and the water heater is prevented from working in the dry burning state and is protected effectively, so that the service life of the water heater is prolonged.

Description

technical field [0001] The invention relates to the field of water heaters, in particular to a water heater replenishment judging method. Background technique [0002] Existing water heaters use a temperature controller to judge whether they are dry. A temperature sensing device is installed inside the water heater, and then the liquid expansion type, or patch type, or temperature sensor is placed on the temperature measurement position on the inner tank to set the temperature. A fixed heating temperature, for example, the rated operating temperature of the water heater is 75°C, then it will be disconnected directly when it is heated to 75°C. In fact, it is a judgment on the value of a limited temperature. For example, when the temperature is 5°C, the heating is restarted, and the cycle is repeated. In fact, it is a limit value. After reaching this temperature, it will be disconnected, and it will be judged whether it is dry or normal. It is not judged whether there is wate...

AI Technical Summary

Problems solved by technology

In fact, it is a limit value. After reaching this temperature, it will be disconnected, and it will be judged whether it is dry or normal. It is not judged whether there is water in the inner tank, or whether the water is full. high temperature state

[0003] In the electronic sensor solution, it is possible to add a judgment value based on the rated value of the whole machine at 75°C, such as 85°C. If 75°C is detected, the power will be cut off. In the case of dry heating, the surface temperature of the heater will rise rapidly, and the residual heat will rise after the power is turned off. If it exceeds 85°C, it is considered to be dry heating. It will be prompted on the display, and a certain degree of dry heating can be determined. However, the judged temperature has exceeded the rated temperature of the machine, and it is judged at the later stage of dry burning. The response speed is slow, and precise control cannot be achieved. The electrical system will be in a high temperature state for a period of time.

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