Incremental-circulating heating solar heat collector

Abstract

The invention discloses an incremental-circulating heating solar heat collector. All circulating pipes are arranged in parallel, each circulating pipe is provided with a water inlet circulating pipe below and a water outlet circulating pipe above, each glass heat collecting pipe is wrapped outside the water inlet circulating pipe and the water outlet circulating pipe of each circulating pipe, and a plurality of circulating pipes are sequentially arranged from top to bottom. The invention has the advantages of rapid heating and high heat efficiency, and can be widely applied to the fields of a wall hanging solar water heater for a balcony and other solar water heaters.

Description

technical field [0001] The invention belongs to the technical field of solar water heaters, in particular to a progressive cycle heating solar heat collector. Background technique [0002] The current balcony wall-mounted solar water heaters mainly have the following forms: One is the U-shaped tube-type balcony wall-mounted solar water heater. The heat exchanger in the tank is added with a heat transfer medium, and the heat transfer medium is heated by a vacuum tube, and the water in the water tank is heated through natural circulation, and the water reaches a certain temperature through secondary heat exchange. The average water temperature in spring, summer and autumn is 60 ° C, and the average temperature in winter The water temperature is 40°C. The U-shaped tube balcony wall-mounted solar water heater heats the water in the water tank through heat exchange. Therefore, there is a certain heat loss during the heat exchange process. Therefore, the temperature of the hot wat...

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Problems solved by technology

[0002] The current balcony wall-mounted solar water heaters mainly have the following forms: One is the U-shaped tube-type balcony wall-mounted solar water heater. The heat exchanger in the tank is added with a heat transfer medium, and the heat transfer medium is heated by a vacuum tube, and the water in the water tank is heated through natural circulation, and the water reaches a certain temperature through secondary heat exchange. The average water temperature in spring, summer and autumn is 60 ° C, and the average temperature in winter The water temperature is 40°C. The U-shaped tube balcony wall-mounted solar water heater heats the water in the water tank through heat exchange. Therefore, there is a certain heat loss during the heat exchange process. Therefore, the temperature of the hot water in the water tank is limited and the heating efficiency is low; It is a single-tube balcony wall-mounted solar water heater. It is connected with multiple stainless steel single tubes and water channels. The vacuum tube is used to heat the water in the single tube, and the water in the water tank is heated through the natural circulation of the water flow. Because the water circulation is slow, so The water temperature in the water tank reaches an average of 65°C in spring, summer, and autumn. Since the water flow is in one pipe, hot water goes up from one side, and cold water flows down from one side, so there is certain resistance, and the natural circulation of water is slow. Limited, the thermal efficiency is a little higher than that of U-shaped tubes; the third is the flat-panel balcony wall-mounted solar water heater. The skin is welded on the φ10 copper tube to make a heat collecting plate. After the main body is welded, multiple heat collecting plates are connected to the water flow pipe to form a flat plate heat collector, which is connected with the heat exchanger in the water tank, and heat transfer medium is added to collect heat. The device collects sunlight to heat the heat-conducting medium, and heats the water in the water tank through the heat exchanger, so that the water gradually heats up. The average water temperature in summer is 60°C, and the water temperature in winter is 40°C. Since the heating medium passes through the natural circulation to the heat exchanger, it is reheated. Water has low thermal efficiency. In winter, due to no insulation, part of the heat is lost. Therefore, the thermal efficiency of flat plate collectors is low.

The thermal efficiency of the above three circulation methods is generally low, and the water temperature is not high, especially in winter, the water temperature is lower

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