Roof solar water heating system

Abstract

The utility model discloses a roof solar water heating system which comprises a flat-plate solar collector, an air source heat pump unit, a heat pump heating circulating water pump, a pipeline system and a heat preservation water tank. The flat-plate solar heat collectors are fixed on a roof foundation through a support, the flat-plate solar heat collectors are arranged in multiple rows and are connected in series through heat collector water pipes, and the two ends of each flat-plate solar heat collector are connected to the heat preservation water tank. The air source heat pump unit and the heat pump heating circulating water pump are connected to the heat preservation water tank through a circulating water pipe. The cold water supply pipe supplements cold water to the heat preservation water tank, the hot water supply pipe conveys hot water in the heat preservation water tank to all water consumption ports, and the hot water return pipe recovers unused hot water to the heat preservation water tank. The solar water heater can solve the problems that the water temperature of the solar water heater rises slowly and is unstable, residual hot water cannot be effectively utilized, and energy is wasted due to electric heating in cloudy and rainy days.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and specifically provides a roof solar water heating system. Background Technology

[0002] A solar water heating system uses solar collectors to collect solar heat, which is then fully converted into heat energy under sunlight. The system automatically controls circulating pumps or solenoid valves to transfer the collected heat to a large insulated water tank. When combined with an equivalent amount of electricity, gas, or oil, the water in the tank is heated and becomes a relatively stable, quantitative energy source.

[0003] Traditional solar water heating systems, while capable of saving electricity (or fuel) to some extent, have shortcomings in terms of ease of use: firstly, they heat up slowly, resulting in no hot water available in the morning and forenoon hours; secondly, hot and cold water mix at night, leading to unstable water temperatures; thirdly, they cannot effectively utilize surplus hot water, resulting in waste; and fourthly, they cannot fully utilize solar heating on cloudy or rainy days, and may even lead to energy waste in some situations. Utility Model Content

[0004] The purpose of this utility model is to provide a rooftop solar water heating system to solve the problems of slow water temperature rise, unstable water temperature, ineffective use of surplus hot water, and energy waste caused by electric heating during cloudy and rainy weather.

[0005] The technical solution of this utility model is: a rooftop solar water heating system, comprising: a flat-plate solar collector 1, an air-source heat pump unit 2, a heat pump heating circulating water pump 3, a piping system 4, and an insulated water tank 5; the piping system 4 includes a cold water supply pipe 4a, a hot water supply pipe 4b, a hot water return pipe 4c, a circulating water pipe 4d, and a collector water pipe 4e; the flat-plate solar collector 1 is fixed to the roof foundation by a bracket, and multiple flat-plate solar collectors 1 are arranged in multiple rows, connected in series by the collector water pipe 4e, with both ends connected to the insulated water tank 5; the air-source heat pump unit 2 and the heat pump heating circulating water pump 3 are connected to the insulated water tank 5 through the circulating water pipe 4d; the cold water supply pipe 4a replenishes cold water to the insulated water tank 5, the hot water supply pipe 4b delivers hot water from the insulated water tank 5 to each water outlet, and the hot water return pipe 4c recovers unused hot water back to the insulated water tank 5.

[0006] Furthermore, the flat-plate solar collector 1 uses a copper-aluminum composite collector core with an annual light absorption rate of 0.95 and a single plate area of ​​2m². 2 .

[0007] Furthermore, the number of air source heat pump units 2 is 10.

[0008] Furthermore, the number of heat pump heating circulating water pumps 3 is 10.

[0009] Furthermore, there are two insulated water tanks 5, each with an effective volume of 50,000L and an operating weight of 60t. The inner liner is made of stainless steel, the middle layer is an 8cm thick insulation layer, and the outer layer is an aluminum alloy shell.

[0010] This utility model has the following beneficial effects:

[0011] 1. The solar collectors in this utility model consist of multiple pieces and groups, with a large area for receiving sunlight, strong heat absorption, and rapid temperature rise of the generated water.

[0012] 2. This utility model adopts a heat pump heating circulating water pump, which can efficiently and promptly merge cold and hot water in the water temperature and continuously maintain the water temperature; the hot water return pipe at the end recovers unused hot water, ensuring a stable hot water supply and avoiding water waste.

[0013] 3. This utility model uses an air source heat pump, which can play an auxiliary automatic heating role on cloudy or rainy days or when solar energy is insufficient, ensuring a continuous supply of hot water, reducing electricity costs, and saving energy and protecting the environment.

[0014] 4. The inner liner of the insulated water tank of this utility model is made of stainless steel, with an 8cm thick insulation layer in the middle and an aluminum alloy shell on the outer layer, forming a sturdy and heat-insulating structure with excellent heat preservation function, which can maintain the hot water temperature for up to 2 days. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] In the diagram: 1. Flat-plate solar collector; 2. Air source heat pump unit; 3. Heat pump heating circulating water pump; 4. Piping system; 4a. Cold water supply pipe; 4b. Hot water supply pipe; 4c. Hot water return pipe; 4d. Circulating water pipe; 4e. Collector water pipe; 5. Insulated water tank. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] like Figure 1As shown, a rooftop solar water heating system includes: a flat-plate solar collector 1, an air-source heat pump unit 2, a heat pump heating circulating water pump 3, a piping system 4, and an insulated water tank 5; the piping system 4 includes a cold water supply pipe 4a, a hot water supply pipe 4b, a hot water return pipe 4c, a circulating water pipe 4d, and a collector water pipe 4e; the flat-plate solar collector 1 is fixed to the roof foundation by a bracket, and multiple flat-plate solar collectors 1 are arranged in multiple rows, connected in series by the collector water pipe 4e, and both ends are connected to the insulated water tank 5; the air-source heat pump unit 2 and the heat pump heating circulating water pump 3 are connected to the insulated water tank 5 through the circulating water pipe 4d; the cold water supply pipe 4a replenishes cold water to the insulated water tank 5, the hot water supply pipe 4b delivers hot water from the insulated water tank 5 to each water outlet, and the hot water return pipe 4c recovers unused hot water to the insulated water tank 5.

[0019] Furthermore, the flat-plate solar collector 1 uses a copper-aluminum composite collector core with an annual light absorption rate of 0.95 and a single plate area of ​​2m2.

[0020] Furthermore, there are 10 air source heat pump units 2. On cloudy or rainy days or when solar energy is insufficient, these units can play an auxiliary heating role to ensure a continuous supply of hot water.

[0021] Furthermore, the heat pump heating circulating water pump 3 consists of 10 units, which can automatically start and stop by setting the water temperature, continuously circulating the hot and cold water in the insulated water tank 5 to maintain a certain water temperature.

[0022] Furthermore, the cold water supply pipe 4a replenishes cold water to the insulated water tank 5.

[0023] Furthermore, the hot water supply pipe 4b transfers the hot water from the insulated water tank 5 to the end of the household's water supply.

[0024] Furthermore, the hot water return pipe 4c recovers the unused hot water in the hot water supply pipe 4b into the insulated water tank 5.

[0025] Furthermore, the two ends of the circulating water pipe 4d are connected to the insulated water tank 5 respectively. Through the operation of the air source heat pump unit 2 and the heat pump heating circulating water pump 3, the hot and cold water in the insulated water tank 5 are continuously circulated to maintain the same water temperature.

[0026] Furthermore, the collector water pipe 4e connects the internal manifolds of each flat-plate solar collector 1, and its two ends are respectively connected to the insulated water tank 5, so as to heat the cold water by converting solar energy into heat energy.

[0027] Furthermore, there are two insulated water tanks, each with an effective volume of 50,000L and an operating weight of 60t. The inner liner is made of stainless steel, the middle layer is an 8cm thick insulation layer, and the outer shell is an aluminum alloy shell.

[0028] In this invention, the water inside the flat-plate solar collector 1 is heated by solar radiation, causing its temperature to rise and its density to decrease. The heated water then flows from the collector water pipe 4e connected to the flat-plate solar collector 1 into the upper part of the insulated water tank 5. Simultaneously, cold water at the bottom of the insulated water tank 5 flows into the flat-plate solar collector 1 through the collector water pipe 4e. After a period of time, the water in the insulated water tank 5 forms a distinct temperature stratification. The heat pump heating circulating water pump 3 then rapidly circulates the water in the insulated water tank 5 repeatedly, maintaining a certain water temperature. Once the set water temperature is reached, the heat pump heating circulating water pump 3 stops working. When sunlight is insufficient, the water temperature in the flat-plate solar collector 1 is lower, and the air source heat pump unit 2 is activated to assist in water heating, ensuring the water temperature in the insulated water tank 5 and guaranteeing a hot water supply.

[0029] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A rooftop solar water heating system, characterized in that, include: The system comprises a flat-plate solar collector (1), an air-source heat pump unit (2), a heat pump heating circulating water pump (3), a piping system (4), and an insulated water tank (5); the piping system (4) includes a cold water supply pipe (4a), a hot water supply pipe (4b), a hot water return pipe (4c), a circulating water pipe (4d), and a collector water pipe (4e); the flat-plate solar collector (1) is fixed to the roof foundation by a bracket, and multiple flat-plate solar collectors (1) are arranged in multiple rows. The collector water pipes (4e) are connected in series and both ends are connected to the insulated water tank (5); the air source heat pump unit (2) and the heat pump heating circulating water pump (3) are connected to the insulated water tank (5) through the circulating water pipe (4d); the cold water supply pipe (4a) replenishes the cold water to the insulated water tank (5), the hot water supply pipe (4b) delivers the hot water from the insulated water tank (5) to each water use port, and the hot water return pipe (4c) recovers the unused hot water to the insulated water tank (5).

2. A rooftop solar water heating system according to claim 1, characterized in that, The flat-plate solar collector (1) uses a copper-aluminum composite collector core with an annual light absorption rate of 0.95 and a single plate area of ​​2m². 2 .

3. A rooftop solar water heating system according to claim 1, characterized in that, The number of air source heat pump units (2) is 10.

4. A rooftop solar water heating system according to claim 1, characterized in that, The number of heat pump heating circulating water pumps (3) is 10.

5. A rooftop solar water heating system according to claim 1, characterized in that, The number of the insulated water tanks (5) is 2, each with an effective volume of 50,000L and an operating weight of 60t. The inner liner is made of stainless steel, the middle layer is an 8cm thick insulation layer, and the outer layer is an aluminum alloy shell.

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