A zero-cooling water control device and control method with preheating and over-temperature protection

Abstract

The invention discloses a zero-cooled water control device with preheating and over-temperature protection, comprising a water heater body, a circulation pump, a water outlet temperature probe, a gas valve and a controller, and the circulation pump, the water outlet temperature probe and the gas valve are respectively electrically connected to the controller , the controller can automatically match a preheating over-temperature temperature difference according to the preheating preset temperature during the preheating process. Also disclosed is a control method using the zero cold water control device with preheating and overtemperature protection. The present invention has at least the following advantages: 1. The size of the preheating over-temperature temperature difference can be automatically adjusted according to the preheating preset temperature, so that the zero-cooling water control device can meet the needs of water occasions in different seasons, and further improve the self-adaptive ability and Degree of intelligence; 2. The zero-cold water control device of the present invention has the function of preheating and over-temperature protection, which effectively prevents the temperature of the outlet water from being too high during the preheating process, improves water safety and water experience, and avoids hot water scalding accidents.

Description

technical field [0001] The invention relates to the technical field of household appliances, in particular to a zero-cooling water control device and control method with preheating and over-temperature protection, which are suitable for gas water heaters or dual-purpose furnaces. Background technique [0002] Zero-cold water gas water heaters have become a trend in the water heater industry because they can turn on and use hot water immediately. When the preheating function is activated, the built-in circulation pump runs to drive the external hot water pipes and outlet pipes to circulate the water and realize preheating. [0003] At present, in the preheating process of the existing zero-cold water gas water heater, when the outlet water temperature reaches the programmed preheating temperature (that is, T 出水 >T 预热 ), then turn off the circulation pump and exit the preheating. However, in the middle and late stages of the preheating process, the water heater outlet tem...

AI Technical Summary

Problems solved by technology

When the minimum firepower of the water heater is large and the preset temperature T 预设 When it is higher (such as 50°C), the program preheating temperature T 预热 Following the increase, the outlet water temperature T of the water heater after preheating is completed 出水 The over-temperature difference △T from the preset temperature can reach more than 10°C. If you turn on the hot water faucet at this time, a section of hot water (up to 60°C) will flow out. In severe cases, it may cause scalding accidents and affect the user's bathing experience

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