Constant-temperature quick-heating solar water heating system

Abstract

The invention discloses a constant-temperature quick-heating solar water heating system and relates to the technical field of solar energy. The constant-temperature quick-heating solar water heating system comprises a heat collecting panel and a water storage tank, and a heat exchanger, a liquid level sensor and a first temperature sensor are arranged in the water storage tank. A water outlet is formed in the bottom of the water storage tank, a flow sensor is arranged on the water outlet, a water inlet is formed in the top of the water storage tank, a water inlet electromagnetic valve is arranged on the water inlet, a medium box is arranged between the heat collecting panel and the water storage tank, the medium box is of a hollow box structure, and working media are poured into the medium box. The heat collecting panel and the medium box are provided with a first circulating pipeline, and a first circulating pump is arranged on the first circulating pipeline. A second circulating pipeline is arranged between the medium box and the water storage tank, and a second circulating pump is arranged on the second circulating pipeline. The second circulation pipeline communicates with the heat exchanger. An electric heating device and a second temperature sensor are arranged in the medium box. The problem that in the prior art, heating cannot be conducted when water is used, and water cannot be when heating is conducted can be solved.

Description

Technical field[0001]The present invention relates to the field of solar energy, and more particularly to a constant temperature heat solar hot water system.Background technique[0002]The application of solar water heater has been popularized to thousands of households. With the growth of the use time, the inner wall of the solar water heater is gradually formed, and the scale is gradually formed, the more scale, resulting in the volume of the water storage tank, which is getting smaller. The water jam is blocked, the valve is damaged, the shower head is damaged, and the like. The scale on the heat exchanger causes low heat transfer efficiency, which can cause the temperature of the working medium in the collector plate to damage the hot plate, and even initiate a collecting plate to produce an explosion. Some solar water heaters also have electric heating function, even in rainy days, it can also use water heaters normally, very convenient. When the electric heating is enabled, when...

AI Technical Summary

Problems solved by technology

When the electric heating is enabled, when the water temperature does not reach the set value, it will continue to heat. If water is used at this time, it will form a situation of electric heating while using water, which will cause the water to become hotter as it is used. It is necessary to constantly adjust the ratio of cold and hot water. , causing a lot of inconvenience

In response to the above problems, Chinese invention patent CN109838937B discloses an intelligent solar water heater that adjusts the light power of the heat collecting plate to prevent scale, including a heat collecting plate with a built-in working medium, a water storage tank, a fixing frame, a drive motor and a controller, a heat collecting plate and The fixed frame shaft is connected, the water storage tank has a built-in heat exchanger and an electric heater, and a circulating pump is installed in the heating pipeline connected between the heat collecting plate and the heat exchanger; when the water temperature of the water storage tank reaches a higher preset value, the control The device controls the rotation of the heat collecting plate relative to the fixed frame, changes the angle between the heat collecting plate and the sunlight, adjusts the light power of the heat collecting plate, prevents the water temperature from continuing to rise, and effectively avoids the accumulation of scale on the water storage tank and heat exchanger; During the electric heating process of the water storage tank, when the water outlet flow rate is non-zero, the controller controls the electric heater to suspend heating until the water outlet flow value is zero, and continues heating until the set temperature value is reached, so as to avoid the water becoming more and more used. It is necessary to constantly adjust the ratio of cold and hot water, which brings a lot of inconvenience

Although the above-mentioned disclosed technology can achieve the purpose of preventing scale formation, when it adopts the electric heating method, in order to prevent the water temperature change at the user end, the method of "water is not used for heating, and heating is not used" is adopted to ensure constant temperature, but this will cause the hot water to run out after the hot water is used up. , still want to continue to use hot water and need to wait for a long time for heating; in addition, the disclosed technology is also provided with a radiator and a corresponding heat dissipation pipeline for cooling the working medium, which not only increases the cost of the equipment, Also a clear waste of energy

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