Secondary natural circulation solar water heater with floor-type water tank and hot water system

Abstract

The invention relates to a secondary natural circulation solar water heater with a floor-type water tank and a hot water system. The secondary natural circulation solar water heater is composed of a single heat collector (1), a coupled heat collector (2), a heat-retaining water tank (3), a heat exchanger (4), a pressure-increasing fluid-supplying and distension-relieving device (5), an air inlet and vent valve (6), an upper connecting pipe (7), a lower connecting pipe (8), and a liquid transportation pipe (9). An upper port of each of the liquid-pipe-type evacuated tube heat collectors (1, 2) is communicated with the heat exchanger (4) in the heat-retaining water tank (3) through the upper connecting pipe (7), the lower end of the heat exchanger (4) is communicated with a lower port of each of the heat collectors (1, 2) through the lower connecting pipe (8), the pressure-increasing fluid-supplying and distension-relieving device (5) is installed in or outside the heat-retaining water tank (3) or on the heat collectors (1, 2), and is communicated with the heat exchanger or the heat collectors, and can be installed on the ground, and is communicated with the heat exchanger or the heat collectors, the liquid level in the pressure-increasing fluid-supplying and distension-relieving device (5) is higher than a circular heat-collecting system, and the air inlet and vent valve (6) is installed on an input-output interface in the upper part of one of the heat collectors (1, 2).

Description

technical field [0001] The invention relates to a water tank floor-standing secondary natural circulation solar water heater and a hot water system in the solar photothermal field. Background technique [0002] Known: solar water heaters, hot water systems, the highest energy efficiency ratio is natural circulation heat collection, no circulation pump, heat collection does not consume power, high reliability; the best water quality is secondary cycle heat collection, domestic water and heat collection system Isolation, the water quality is not affected by the accumulated dirt in the vacuum tube; the least impact on the image of the building, the highest heat utilization rate is the water heater tank landing, entering the room, the temperature difference between the inside and outside of the water tank is small, and the heat loss is small. The water heater and hot water system can be compared with the new Integration of old buildings. Therefore, the second natural circulatio...

AI Technical Summary

Problems solved by technology

[0006] 1. Because the water tank is at a high place, it has a great influence on the image of the building, and it cannot be integrated with the building

[0007] 2. Because the water tank is at a high place, the temperature difference between the inside and outside of the water tank is large, the heat dissipation is fast, and the heat loss is large. A considerable part of the heat collected by the collector is lost due to the large temperature difference between the inside and outside. The heat collection efficiency has paid a high price, but the increased heat energy is far from being able to make up for the heat energy lost due to the high position of the water tank

[0008] 3. Because the water tank is at a high place, the water heater is easy to be blown down by the strong wind and easily collapsed by the weight of the water tank

[0010] 5. The heat collecting tube and the water tank are in a connected structure, restricting each other, the heat collecting area of ​​the water heater and the volume of the water tank cannot be enlarged, and it is difficult to meet the various hot water requirements of users

[0011] 6. Installing on the herringbone roof is not only difficult to install, but also difficult to maintain, and there are many unsafe hidden dangers, and it has a greater impact on the image of the house

[0012] 7. Because the water tank and water pipes are located outdoors and at high places, it is difficult to prevent the water pipes entering and leaving the water tank from freezing in winter, and they are easy to freeze and block

[0013] 2. The existing wall-mounted solar water heater on the balcony is composed of a flat-plate heat collector or a U-shaped heat collector and a water tank, and the heat is collected by a second natural cycle. The existing problems are: the heat collection area that can be installed on the wall is small, and the volume of the water tank Small, poor lighting conditions, low heat collection efficiency, great impact on the image of building walls, difficult installation and maintenance, many unsafe hazards, high overall cost, and low actual use value

[0015] 1. For forced circulation heat collection, the circulation pump runs for a long time, has low efficiency and high power consumption, and the farther the distance between the circulation pump and the heat collector and the greater the height difference, the greater the power consumption of the circulation heat collection

[0016] 2. The heat collection is greatly affected by the mains electricity and the circulation pump, and the heat collection cannot be performed in case of power failure, shutdown or failure of the circulation pump;

[0017] 3. The circulation pump station and the expansion tank are large in volume, and there are many connecting pipes between the components, which occupy a large space

[0018] 4. Circulating pump station, expansion tank and related control system are high-priced vulnerable parts, with many failure factors and high maintenance costs

[0019] 5. The comprehensive cost is very high, and a set of circulating pumping station costs thousands of yuan, which is very low cost performance

[0021] 1. Circulating heat collection consumes a lot of power and high operating costs

[0022] 2. The heat collection is greatly affected by the mains electricity and the circulation pump. There is no electricity, the circulation pump is turned off or fails to collect heat.

[0023] 3. The relevant components of the circulating pump are vulnerable parts, with many failure factors and high maintenance costs

[0024] 4. There is water in the vacuum tube, which is easy to accumulate dirt and scale. It is easy to explode the tube when it is suddenly cooled or air-dried, and the vacuum tube ruptures and leaks a lot of water.

[0025] 5. It is difficult to prevent freezing in the heat collection system. It needs hot water circulation to prevent freezing. In case of power failure, circulation pump failure and other problems, it cannot prevent freezing

[0026] 6. There are many external circulation pipes in the hot water system, the heat loss is large, and it is difficult to prevent the pipes from freezing;

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