Fast-heating type water heating device

Abstract

The invention discloses a fast-heating type water heating device. The invention relates to a water heating device, in particular to the fast-heating type water heating device which performs heating by using a stainless steel substrate electric heating film and is applied to an instant electric kettle. The fast-heating type water heating device mainly comprises an electric heating film heating plate, a water channel plate, a heating body rear plate, a temperature controller, a thermo-sensitive resistor, a water inlet, a water outlet and a control circuit, wherein the electric heating film heating plate (1) and the heating body rear plate (3) clamp the water channel plate (2) and are connected into a whole by a connecting piece or in a welding sealing mode; a grating (14) is arranged on thewater channel plate (2); a water channel cavity (9) capable of making water flow is formed between the grating (14) on the water channel plate (2) and the electric heating film heating plate (1); theshape of the cavity guides a flowing direction of the water; and the water inlet and the water outlet are positioned at upper and lower ends of the water channel plate and led out from the water channel plate by the heating body rear plate. The fast-heating type water heating device is characterized in that: the electric heating film heating plate (1) is curved and in clearance fit with the waterchannel plate (2), so a local clearance is formed at a joint between the electric heating film heating plate (1) and the grating (14) which is arranged on the water channel plate (2). The invention has the advantages that: compared with the prior art, the fast-heating type water heating device is higher in heat efficiency, better in temperature controllability and lowest in flowing resistance of a heating body; and a water outlet temperature can be controlled to be above 95 DEG C during fast heating.

Description

technical field [0001] The invention relates to a water heating device, in particular to a fast-heating water heating device for an instant electric kettle which uses a stainless steel substrate electric heating film to generate heat. Background technique [0002] After years of development, there have been many types of electric kettles. In recent years, in order to solve the problem of boiling water quality caused by repeated heating of water by a galled heating kettle, people have invented an instant electric kettle device by using the existing electric heating film technology. The cold water can be heated by a water heating body to become hot water, and then flow out through the water nozzle, so that the hot water can be used immediately, which is not only convenient to use, but also saves electric energy, and is safe and hygienic. Such as: a kind of name disclosed in Chinese patent literature on January 31, 2001 is called " instantaneous water heater " patent announceme...

AI Technical Summary

Problems solved by technology

In general, the thermistor will be arranged near the outlet pipe, so that the corresponding relationship between the thermistor signal and the outlet water temperature is more stable, but if it is too close to the outlet pipe, the advance of the control is not enough. When the temperature is found to be too high, adjust it , will cause oscillation and fail to achieve the control target. In addition, the thermistor is the most sensitive sensor when the electric heating film is empty-burned. The temperature rises rapidly, so that the control system can judge the power supply of the electric heating film heating plate in time for the air burning. The transmission speed of the air burning signal is related to the distance between the solder joint of the thermistor and the heating wire. Too small, on the one hand, the manufacturing process is limited, on the other hand, when the water is heated normally, the influence of the temperature of the heating wire on the thermistor will exceed the influence of the water temperature in the water channel on the thermistor, that is, the sensitivity of the thermistor to sense the water temperature will decrease instead.

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