A method for precise control of solar water heater electric heating
A technology of solar water heaters and control methods, which is applied in solar collector controllers, solar thermal power generation, solar collectors, etc., can solve problems such as inability to accurately control heating time, inability to meet water temperature requirements, and energy waste, and achieve Solve the effect of inaccurate time control
Active Publication Date: 2020-12-11
QINGDAO HAIER SMART TECH R & D CO LTD +2
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Problems solved by technology
[0003] In order to solve the problem that the existing large-scale solar water heaters cannot accurately control the heating time when performing electric auxiliary heating, which may easily lead to energy waste or fail to meet the water temperature requirements, the present invention proposes a precise control method for electric heating of solar water heaters, which can solve the above problems question
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Embodiment 1
[0027] The current large-scale outdoor photothermal water heater has a water tank about 3 meters high or higher. Since it is an open water tank, the liquid level in the water tank changes with the user's use or water injection. The heating of the water heater is carried out to meet the user's demand temperature. The control method of the present invention is especially aimed at the precise control of the electric heating of the solar water heater with electric heating function. Due to the high height of the water tank, the water temperature stratification is obvious, and the liquid level is in different stratification Time indicates that the amount of water is different. Therefore, the time required for heating is different. Moreover, when the liquid level is in different layers, the heating time changes according to the current temperature of each layer. At present, it is generally set by setting a fixed time. Heating, or only determining the heating time according to the wate...
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The invention discloses an electric heating accurate control method of a solar water heater. The electric heating accurate control method of the solar water heater comprises the following steps that (1) a water tank is layered, all the layers are numbered from bottom to top or from top to bottom according to the sequence of the natural numbers, and the temperature of the layer where the current water level of the water tank is located and the temperature of each of the layers below the water level are detected; and (2) the total energy needed when the temperatures of the layers below the water level are heated to a target temperature is calculated, and according to the electric heating power of the solar water heater, the heating time is calculated. By the adoption of the electric heating accurate control method of the solar water heater, based on liquid level detection and temperature detection inside the water tank, the heating time is calculated according to the energy conservation law, the heating time is controlled, and therefore the problems that in the electric heating process, time control is not accurate, and energy waste is prone to being caused or the water temperature requirement cannot be met.
Description
technical field [0001] The invention relates to the technical field of water heaters, in particular to a precise heating control method for a solar water heater with electric heating. Background technique [0002] Outdoor large-scale photothermal water heaters need to use electric heating to heat the water heater when the weather is cloudy and rainy and the light is insufficient. Because this type of water heater is open, the water storage inside will change with use or water supply, and because of the large water heater, the height of the water tank is high, and the water temperature stratification is obvious. Due to layer reasons, it is difficult to determine the heating time. If the heating time is set too long, it will lead to energy waste. If the heating time is set too short, it cannot meet the water temperature requirements. Contents of the invention [0003] In order to solve the problem that the existing large-scale solar water heaters cannot accurately control t...
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IPC IPC(8): F24S20/40F24S50/40F24H9/20
CPCF24H9/2021F24S20/40Y02E10/40
Inventor 李德祥徐想谢军刘洋
Owner QINGDAO HAIER SMART TECH R & D CO LTD