Heating method for household instant liquid heating mechanism

Abstract

The invention discloses a heating method of an instant heating type household liquid heating device. The control method comprises the following steps: 1. the required temperature of hot water (TS) is set, a control unit (9) is triggered, if the temperature (T2) of a heating plate is lower than the preset temperature (T0), the heating plate (52) carries out preheating at lower power (P0), and a water pump (2) does not work; if the temperature (T2) of the heating plate (52) is not lower than the preset temperature (T0), the control unit (9) sets the initial power of the heating plate (52) according to the water temperature (T1) at a water inlet, and the water pump (2) works at the rated power P1; 2. the control unit (9) controls the power of the water pump (2) according to the difference between the water temperature (T3) at a water outlet and the set temperature (TS) and the change trend of the water temperature (T3) at the water outlet; 3. the control unit (9) controls the power of the heating plate (52) according to the difference between the water temperature (T3) at the water outlet and the set temperature (TS) and the change trend of the water temperature (T3) at the water outlet. The method regulates the power of the water pump or the heating power of the heating plate by preheating the heating plate, monitoring the water temperature at the water inlet, setting the initial heating power of the heating plate and monitoring the water temperature at the water outlet and the change trend thereof, thereby ensuring water to achieve the set temperature in a short period of time, improving the temperature control precision and having the advantages of small fluctuation range of heating time, small fluctuation range of temperature, relatively longer service life of a heating element and the outlet water temperature which is closer to the set value.

Description

technical field [0001] The invention relates to a household appliance, in particular to a heating method for an instant household liquid heating device. Background technique [0002] In the existing instant household liquid heating device, the water pump and the heating element of the heating unit start to work at the same time, regardless of the temperature of the water to be heated, the heating element is heated with the same power; by detecting the temperature of the water outlet, The water outlet temperature is only compared with the set temperature. When the water outlet temperature reaches or exceeds the set temperature, the heating element will be powered off and stop working, so that the water outlet temperature will drop; when the water outlet temperature is lower than the set temperature, the heating element will be turned off. Turn on the electricity to make the water temperature of the water outlet rise. There is following shortcoming in above-mentioned heating ...

AI Technical Summary

Problems solved by technology

[0005] 3) The control device only compares the water outlet temperature with the set temperature, so the temperature control accuracy is not high, and the tempe

Images