Rapid water heating device and control method thereof

Abstract

The invention discloses a rapid water heating device and a control method thereof. The rapid water heating device comprises a water tank shell, wherein the water tank shell is provided with a water inlet and a water outlet; the water tank shell is internally provided with a heating element; the heating element is connected with a heating control board; the part, which is adjacent to the water outlet, of the water tank shell is provided with an outlet water temperature sensor; the water outlet of the water tank shell is provided with a rectification cavity; a head induction point and a rod body of the outlet water temperature sensor are positioned in the rectification cavity; the distance between the outlet water temperature sensor and the heating element is 1-15mm. The part, which is adjacent to the water outlet, of the water tank body is provided with the rectification cavity and the installation position of the outlet water temperature sensor is controlled, so that an inlet water temperature sensor and a flowmeter are omitted, the device structure is simplified, and the inlet water temperature sensor and the flowmeter can be accurately estimated by use of the outlet water temperature sensor, the temperature control accuracy and the reaction rate are improved, and the rapid water heating device is stable and reliable in performance, long in service life and relatively good in compatibility.

Description

technical field [0001] The invention relates to a water heating device and a control method thereof, in particular to a rapid water heating device and a control method thereof, which are suitable for instant water heating devices such as high-end smart toilets, fast heating kitchen treasures, and showers. Background technique [0002] With the development of science and technology and the improvement of living standards, fast heating kitchen appliances, showers and intelligent warm water toilets have gradually entered domestic ordinary families. Before the rapid water heating device was introduced into the application, the traditional water heating method was the heat storage heating method of the water tank. Its typical structure generally includes: a large hot water storage tank 1 (capacity is usually greater than 600ml), a heating element 2 in the water tank, a water inlet 3 at the bottom of the water tank, a water outlet 4 above the water tank, and a water level switch a...

AI Technical Summary

Problems solved by technology

[0016] 2. Poor accuracy of outlet water temperature

[0018] 3. The structure is complex and it is difficult to further reduce the volume

[0019] Due to the use of four sensors and various related sealing and fixing structures, the structure is complicated, the wiring of power lines, signal lines, and communication lines is intricate, and the shape of the device is irregular. It is difficult to further reduce the volume of the rapid water heating device, which is not conducive to Structural layout of end products

[0020] 4. At present, the traditional water heating device generally has the disadvantage that scale is easy to form in the heating water tank and on the heating element, thus shortening the service life

Part of the scale on the heating element will peel off from the heating element piece by piece under the impact of cold and hot temperature during the switching process of heating on and off, which aggravates the uneven heat dissipation on the surface of the heater, and the temperature difference between different areas on the surface is large

Under the rising temperature difference between the inside and outside of the heating element, the temperature difference between different areas of the surface and the impact of cold water, it is easy to cause the heating element to break due to thermal stress, thereby shortening the service life of the device

On the other hand, larger pieces of scale peeled off from the surface of the heating element are also likely to block the flow path, which also causes rapid failure of the device

[0021] 5. Some fast water heating devices currently on the market cannot effectively remove the air bubbles in the water. The air bubbles are often adsorbed on the surface of the heating element, or move irregularly on the surface of the heating element, resulting in uneven surface temperature of the heating element and sudden fluctuations in the water flow temperature. High and low; at the same time, thermal stress is generated, which accelerates the failure of heating elements

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