Modular heat collection solar heating system

Abstract

The utility model relates to a modular heat collection solar heating system, which belongs to the technical field of solar energy utilization, comprises a heat collector and a heat preservation water tank, and is characterized in that the heat collector is a totally-closed box body, heat preservation layers are arranged on a bottom plate and side surrounding plates of the box body, a top plate of the box body is a heat collection plate, and heat absorption coating is coated on the upper surface of the heat collection plate. A transparent cover plate covers the heat collection plate, a water inlet pipe and a water outlet pipe are arranged on the box body, one heat collector serves as a heat collection module, and more than one heat collection module is connected with the heat preservation water tank in series or in parallel to form a closed circulating water path. The solar water heater has the advantages of being simple in structure, long in service life, safe, reliable and low in cost, the heat collectors are not prone to damage, the number of the heat collectors and the volume of the heat preservation water tank can be designed according to weather conditions and heating areas of a use land, and the solar water heater is very suitable for rural areas and pasturing areas.

Description

Technical Field

[0001] This utility model relates to a modular solar heating system with heat collection, belonging to the field of solar energy utilization technology. Background Technology

[0002] Winters are cold in northern my country, requiring heating systems to get through the winter. Previously, urban heating typically used central heating, mostly centralized systems, with a smaller number using individual natural gas stoves or electric heating. In rural and pastoral areas, coal or wood-burning stoves were commonly used. However, with increasing environmental regulations, rural and pastoral areas have begun to restrict or even ban the use of coal or wood-burning stoves, promoting the use of clean energy sources such as natural gas or electricity. Using clean energy sources like natural gas requires laying extensive pipelines, resulting in significant investment and high operating costs; electricity is simply unaffordable for farmers and herders.

[0003] Solar energy, as a renewable and clean energy source, is currently widely used. The most common application of solar thermal energy is the glass evacuated tube collector. The advantages of glass evacuated tube collectors are high thermal efficiency and low cost; however, their disadvantages include the fragility of the glass tubes, making them particularly unsuitable for use in extremely cold regions. Metal tube collectors have a long service life and high thermal efficiency, but they often require a matching heat pump system, which is very expensive and unaffordable for most farming and herding households. Summary of the Invention

[0004] The purpose of this invention is to provide a modular solar heating system with a simple structure, durable collectors, long service life, and low cost, suitable for use in rural and pastoral areas.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model includes: a solar collector and an insulated water tank. The solar collector is a fully enclosed box with an insulation layer on the bottom and side panels. The top panel of the box is a solar collector plate embedded in the side panels, with the upper edge of the side panels higher than the upper surface of the solar collector plate. A heat-absorbing coating is applied to the upper surface of the solar collector plate. A transparent cover plate covers the solar collector plate, with a gap between the transparent cover plate and the solar collector plate. The box is equipped with an inlet pipe and an outlet pipe. One solar collector serves as a solar collector module. One or more solar collector modules are connected to the insulated water tank in series or parallel to form a closed-loop water circuit.

[0007] The box is a flat box with a regular shape, such as square, rectangle, circle, oval, etc.

[0008] The transparent cover is made of glass, plexiglass, rigid plastic, or acrylic.

[0009] The water inlet pipe on the box is installed on the lower part of the side panel or the bottom plate of the box, and the water outlet pipe is installed on the upper part of the side panel of the box.

[0010] The volume of the insulated water tank is more than twice the sum of the volumes of all the heat collection modules;

[0011] The heat collection plate is a metal plate with good heat absorption performance, such as: copper plate, aluminum plate, aluminum alloy plate, iron plate, etc.

[0012] Heat dissipation fins are provided on the lower surface of the heat collection plate;

[0013] The insulated water tank is equipped with an outlet pipe and a return pipe that are connected to the heat collection module.

[0014] The connection point between the water outlet pipe and the heat collection module of the insulated water tank and the insulated water tank is higher than the highest water level line of the insulated water tank.

[0015] Valves are installed on the outlet and return pipes connecting the insulated water tank and the heat collection module.

[0016] A first circulating water pump is installed on the water outlet pipe connecting the insulated water tank and the heat collection module.

[0017] The insulated water tank is equipped with an outlet pipe and a return pipe that are connected to the heating system.

[0018] Valves are installed on the outlet and return pipes connecting the insulated water tank to the heating system.

[0019] A second circulating water pump is installed on the outlet pipe connecting the insulated water tank and the heating system.

[0020] The connection point between the return water pipe and the insulated water tank and the heating system is higher than the highest water level line of the insulated water tank.

[0021] The advantages of this utility model are: simple structure, the collector is not easily damaged, long service life, safe and reliable, low cost, and the number of collectors and the volume of the insulated water tank can be designed according to the climate conditions and heating area of ​​the place of use, making it very suitable for use in rural and pastoral areas. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the series connection of the heat collection modules of this utility model;

[0023] Figure 2 This is a schematic diagram of the parallel connection of the heat collection modules of this utility model;

[0024] Figure 3 This is a cross-sectional view of the heat collector plate.

[0025] In the diagram: 1-Insulated water tank; 2-Return water pipe connecting the insulated water tank and the heat collection module; 3-Second valve; 4-Outlet water pipe; 5-Heat collection plate; 6-Transparent cover; 7-Heat collector; 8-Inlet water pipe; 9-Outlet water pipe connecting the insulated water tank and the heat collection module; 10-First circulating water pump; 11-First valve; 12-Third valve; 13-Second circulating water pump; 14-Outlet water pipe connecting the insulated water tank and the heating system; 15-Return water pipe connecting the insulated water tank and the heating system; 16-Fourth valve; 17-Heat dissipation fins. Detailed Implementation

[0026] See attached document Figure 1 This utility model includes: a solar collector 7 and an insulated water tank 1. The solar collector 7 is a fully enclosed box with a regular-shaped flat shape, such as square, rectangular, circular, or elliptical. The bottom plate and side panels of the box are provided with an insulation layer. The top plate of the box is a solar collector plate 5, and the upper surface of the solar collector plate 5 is coated with a heat-absorbing coating. The solar collector plate 7 is a metal plate with good heat absorption performance, such as copper, aluminum, aluminum alloy, or iron. Figure 3 As shown, the lower surface of the heat collection plate 7 is provided with heat dissipation fins 17; a transparent cover plate 6 is covered on the heat collection plate 7, which is made of glass, plexiglass, hard plastic or acrylic; the box body is provided with an inlet pipe 8 and an outlet pipe 4, the inlet pipe 8 is installed on the lower part of the side panel or the bottom plate of the box body, and the outlet pipe 8 is installed on the upper part of the side panel of the box body; one heat collector 7 is a heat collection module, and one or more heat collection modules are connected in series with the insulated water tank 1 to form a closed circulation water circuit, or as... Figure 2 The circuit is connected in parallel with the insulated water tank 1 to form a closed-loop water circuit. The volume of the insulated water tank 1 is more than twice the sum of the volumes of all the heat collection modules. A first valve 11 and a first circulating water pump 10 are installed on the outlet pipe 9 connecting the insulated water tank and the heat collection modules, and a second valve 3 is installed on the return pipe 2 connecting the insulated water tank and the heat collection modules. An outlet pipe 14 and a return pipe 15 connecting the insulated water tank and the heating system are installed on the insulated water tank 1. A third valve 12 and a second circulating water pump 13 are installed on the outlet pipe 14 connecting the insulated water tank and the heating system, and a fourth valve 16 is installed on the return pipe 15 connecting the insulated water tank and the heating system. The connection points of the return pipe 2 connecting the insulated water tank and the heat collection modules and the return pipe 15 connecting the insulated water tank and the heating system to the insulated water tank 1 are both higher than the highest water level line of the insulated water tank 1.

[0027] When applying this system, pre-calculate the number of heat collection modules and the volume of the insulated water tank 1 based on the local climate and heating area. Install the heat collection modules in a sunny, open outdoor location (either on the ground or roof). Figure 1 As shown, multiple heat collection modules are connected in series with the insulated water tank 1 to form a closed-loop water circuit, or as... Figure 2 The diagram shows multiple solar collector modules connected in parallel to the insulated water tank 1 to form a closed-loop water circuit. The outlet pipe 14 connecting the insulated water tank to the heating system and the return pipe 5 connecting the insulated water tank to the heating system are connected to the user's heating system to form a closed-loop water circuit. Clean water is injected into the insulated water tank 1 to the highest water level line. During the day, after sunrise, the first valve 11 and the second valve 3 are opened, and the first circulating water pump 10 is started, pumping water from the insulated water tank 1 into the solar collector modules until a stable flow of water flows back to the insulated water tank 1 from the return pipe 2 connecting the insulated water tank and the solar collector modules. This indicates that all solar collector modules are now full of clean water. The first valve 11 and the first circulating water pump 10 are then closed. Before sunset, the first valve 11 is opened again, and the first circulating water pump 10 is started, allowing the first circulating water circuit to continue operating. The circulating water pump 10 pumps water in reverse, drawing all the water in the solar collector modules back to the insulated water tank 1 through the outlet pipe 9 connecting the insulated water tank and the solar collector modules (when the installation position of the solar collector modules is higher than the position of the insulated water tank 1, the first circulating water pump 10 does not need to work; after opening the first valve 11, the water will naturally flow back to the insulated water tank 1 by gravity). After operating in this way for several days, the water temperature in the insulated water tank 1 reaches a relatively high working temperature. Then, the third valve 12 and the fourth valve 16 are opened, and the second circulating water pump 13 is started, so that a water circulation is formed between the heating system and the insulated water tank 1, continuously providing indoor heating. At the same time, the insulated water tank 1 and the solar collector modules continue to maintain a connection during the day, with water being injected into the solar collector modules to absorb solar energy, and the heated water being drawn back to the insulated water tank 1 in the evening to raise the temperature of the water in the insulated water tank 1, so as to ensure the stability of the heating temperature. During operation of this invention, the second valve 3 must remain open to ensure that the water in the heat collection module can be depressurized through the return water pipe 2 connecting the insulated water tank and the heat collection module after heating and expansion. To ensure that the water temperature in the insulated water tank 1 always meets the heating requirements, an auxiliary electric heating system is provided in the insulated water tank 1. The heating device of the auxiliary electric heating system is an electric heating rod, an electric heating tube, or a high-frequency induction heating device.

Claims

1. A modular, thermal concentrating, solar heating system comprising: The heat collector and the heat preservation water tank are characterized in that the heat collector is a fully enclosed box, the bottom plate and the side wall of the box are provided with a heat preservation layer, the top plate of the box is a heat collecting plate, the heat collecting plate is embedded in the side wall, the upper edge of the side wall is higher than the upper surface of the heat collecting plate, the upper surface of the heat collecting plate is coated with a heat absorbing paint, a transparent cover plate is covered on the heat collecting plate, a gap is left between the transparent cover plate and the heat collecting plate, the box is provided with a water inlet pipe and a water outlet pipe, one heat collector serves as a heat collecting module, and more than one heat collecting module is connected with the heat preservation water tank in series or in parallel to form a closed circulating water path.

2. The modular, thermal concentrating, solar heating system of claim 1, wherein: The box is a regular flat box.

3. The modular, thermal concentrating, solar heating system of claim 1, wherein: The transparent cover plate is a glass or hard plastic transparent cover plate.

4. The modular, thermal concentrating, solar heating system of claim 1, wherein: The water inlet pipe on the box is installed on the lower part of the side wall or the bottom plate of the box, and the water outlet pipe is installed on the upper part of the side wall of the box.

5. The modular, thermal concentrating, solar heating system of claim 1, wherein: The volume of the heat preservation water tank is more than twice the sum of the volumes of all heat collecting modules.

6. The modular, thermal concentrating, solar heating system of claim 1, wherein: Heat dissipation fins are arranged on the lower surface of the heat collecting plate.

7. The modular, thermal concentrating, solar heating system of claim 1, wherein: A water outlet pipe and a return water pipe connected with the heat collecting module are installed on the heat preservation water tank, valves are installed on the water outlet pipe and the return water pipe, and a first circulating water pump is installed on the water outlet pipe connected with the heat collecting module.

8. The modular, thermal collecting, solar heating system of claim 7, wherein: The connection position of the water outlet pipe connected with the heat collecting module and the heat preservation water tank of the heat preservation water tank is higher than the highest water level line of the heat preservation water tank.

9. The modular, thermal collecting, solar heating system of claim 1, wherein: A water outlet pipe and a return water pipe connected with the heating system are installed on the heat preservation water tank, valves are installed on the water outlet pipe and the return water pipe, and a second circulating water pump is installed on the water outlet pipe connected with the heating system.

10. The modular, thermal collecting, solar heating system of claim 9, wherein: The connection position of the return water pipe connected with the heating system and the heat preservation water tank of the heat preservation water tank is higher than the highest water level line of the heat preservation water tank.

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