Solar heat storage assembly and sunlight greenhouse applying same

Abstract

The solar heat storage assembly comprises a solar heat collector, a heat storage water tank and a plurality of water tanks. The hot water storage tank comprises two water inlets and two water outlets, the hot water storage tank comprises two water inlets and two water outlets, the two water inlets are connected with the water outlet end of the solar heat collector and the water inlet pipe respectively, and the two water outlets are connected with the water outlet end of the solar heat collector and the water outlet pipe respectively. The two water outlets are respectively connected with a water inlet end of the solar heat collector and a water outlet pipe; a first circulating pump is arranged on a pipeline between the water inlet end and the water outlet, and the water outlet pipe is communicated with a second circulating pump and located between the hot water storage tank and the first water tank. Firstly, the design can be applied to a steel frame type greenhouse, sufficient temperature can be absorbed through the solar heat collector in the daytime to heat water in the greenhouse, the heated water can be conveyed into the multiple water tanks, the water in the water tanks can be heated through the heat exchange coil pipes in the water tanks, and the heat storage and heat preservation capacity of the greenhouse is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of greenhouse heat storage, in particular to a solar heat storage component and a solar greenhouse using the same. Background Art

[0002] When cultivating in greenhouses, temperature is one of the main factors affecting crop growth. Crop growth not only requires higher temperatures, but the heat storage and insulation capacity of the solar greenhouse at night is also an important factor affecting crop growth.

[0003] Traditional solar greenhouses use soil blocks, masonry blocks and other materials as walls. Their heat storage and insulation capabilities mainly rely on the wall materials themselves. In some areas such as Gobi Desert, sandy land, and saline-alkali land, the stability of walls such as soil blocks and masonry blocks is poor. The overall structure of the solar greenhouse needs to use a steel frame, which is combined with film, scraper cloth and other materials to form the whole. Although it can absorb more sunlight during the day, its heat storage and insulation capabilities at night are poor, which is not conducive to the growth of crops. For example, Chinese patent number CN214482456U discloses a system based on intelligent management. The greenhouse uses an electric heater 201 in combination with multiple second air outlet ducts 208 to store heat and keep warm, which solves certain heat storage and heat preservation problems. However, active heating cannot store heat and dissipate heat. The electric heater needs to be started for a long time at night, and a high-power fan needs to be used in the greenhouse to ensure normal heat storage capacity, which wastes more electricity. In addition, the hot air delivered by the second air outlet duct 208 will directly and long-term act on the crops nearby, causing heat damage to the crops, excessive evaporation of water, etc., which is not conducive to the growth of crops. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a solar thermal storage component and a solar greenhouse using the same.

[0005] The technical solution of this utility model is as follows:

[0006] A solar thermal storage assembly comprises a solar thermal collector, a hot water storage tank and a plurality of water tanks;

[0007] The hot water storage tank comprises two water inlets and two water outlets, the hot water storage tank is connected with a water inlet pipe and a water outlet pipe, the two water inlets are respectively connected with the water outlet end and the water inlet pipe of the solar thermal collector, and the two water outlets are respectively connected with the water inlet end and the water outlet pipe of the solar thermal collector;

[0008] The multiple water tanks are individually connected to the water inlet pipe and the water outlet pipe;

[0009] A first circulation pump is arranged on the pipeline between the water inlet and the water outlet, and the water outlet pipe is connected with a second circulation pump and is located between the hot water storage tank and the first water tank.

[0010] In order to conveniently replenish tap water for the water tank, the hot water storage tank and the solar collector, the end of the water inlet pipe away from the hot water storage tank is connected to the water source, and a valve is arranged between the water inlet pipe and the water source.

[0011] In order to prevent the pipeline from freezing and cracking when the temperature is too low and to provide guarantee for the safe operation of the pipeline, the water outlet pipe is connected with a pipeline heater.

[0012] In order to heat the water entering the water outlet pipe as soon as possible when the temperature is low, the pipeline heater is located between the second circulation pump and the first water tank.

[0013] In order to conveniently control the water inlet and outlet of the water tank and to control any water tank individually, valves are installed on the pipelines between the water tank and the water inlet pipe and the water outlet pipe.

[0014] In order to ensure the stability of the water temperature in the water tank and improve heat exchange, a heat exchange coil is provided in the water tank, and both ends of the heat exchange coil are respectively connected to the water inlet pipe and the water outlet pipe.

[0015] In order to exhaust the internal gas when adding water to the hot water storage tank and the solar thermal collector, an exhaust valve is installed on the water inlet pipe, and the exhaust valve is located at one end of the water inlet pipe away from the hot water storage tank.

[0016] In order to collect solar heat conveniently, the solar thermal collector is a group of four interconnected header-type collectors.

[0017] A solar greenhouse comprises a greenhouse body and a solar heat storage component. The solar heat collector is installed on the top of the greenhouse body, and the hot water storage tank and the water tank are both arranged inside the greenhouse body.

[0018] In order to facilitate heat storage and insulation at multiple locations in the greenhouse body, multiple water tanks are arranged at intervals in the greenhouse body, and the interval size is 10m-20m.

[0019] The beneficial effects of the utility model are as follows: the utility model is a solar heat storage component and a solar greenhouse using the same. Firstly, the design can be applied to a steel frame greenhouse. The solar collector can absorb enough temperature during the day to heat the water temperature inside the greenhouse. Then, the first circulation pump and the second circulation pump are started at a fixed time, and the corresponding valves are opened to transport the heated water to multiple water tanks. The water in the water tanks can be heated by the heat exchange coils in the water tanks, thereby dissipating the temperature in the greenhouse, ensuring the temperature in the greenhouse and improving the heat storage and insulation capacity of the greenhouse. Secondly, different from the method of using electric heaters in the prior art, the water circulation form used in the design, and the water tank located in the greenhouse has a certain insulation capacity after being heated. Only a few circulation pumps are needed every day to store heat and insulate the greenhouse, replacing the warm air insulation method. This saves electricity and avoids direct blowing on crops, thereby ensuring normal growth of crops. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0021] In the attached picture:

[0022] Figure 1 This is a schematic diagram of the connection of the thermal storage components;

[0023] Figure 2 This is a schematic diagram of the water tank cover removal structure;

[0024] Figure 3 Top view of the water tank without cover;

[0025] Figure 4 This is a schematic diagram of the connection between the pipe heater and the water outlet pipe;

[0026] Figure 5 This is a schematic diagram of the heat storage structure and solar greenhouse;

[0027] The components represented by the reference numerals in the figure are:

[0028] 1. Solar collector; 2. Hot water storage tank; 3. Water tank; 4. Water inlet; 5. Water outlet; 6. Water inlet pipe; 7. Water outlet pipe; 8. Water outlet end; 9. Water inlet end; 10. First circulation pump; 11. Second circulation pump; 12. Water source; 13. Valve; 14. Pipe heater; 15. Heat exchange coil; 16. Exhaust valve; 17. Greenhouse body. DETAILED DESCRIPTION

[0029] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0030] Example

[0031] As mentioned in the background technology, in the special environments of some special areas, such as the Gobi Desert, sandy land or saline-alkali land and other areas with poor soil environment, traditional solid walls such as soil blocks and masonry blocks have poor stability when used as the supporting body of the solar greenhouse. Therefore, it is necessary to use a steel frame with a combination of materials such as scraper cloth as the wall of the solar greenhouse. This will result in poor heat storage and insulation effects, which is not conducive to the growth of crops. The prior art uses electric heaters as heat sources to provide hot air in the solar greenhouse to ensure the ability to store heat and keep heat. However, on the one hand, long-term opening will waste more electricity and can only be actively heated. On the other hand, hot air directly acts on crops, which will affect the growth of crops. Therefore, the inventor designed a heat storage component and applied it to the solar greenhouse to solve the problem of heat storage and insulation. The following is a detailed explanation with reference to the diagram.

[0032] This embodiment provides a solar thermal storage component. Figure 1 The heat storage component includes a solar collector 1, a hot water storage tank 2 and a plurality of water tanks 3. In order to facilitate the absorption of heat, the solar collector 1 is a header-type collector. In order to improve the heat absorption effect and ensure sufficient heated water, four groups of connected header-type collectors are used. The two ends open after the connection are respectively a water inlet end 9 and a water outlet end 8, which are used for the water inlet and water discharge of the solar collector 1.

[0033] In this embodiment, the hot water storage tank 2 includes two water inlets 4 and two water outlets 5, which are respectively connected to the solar collector 1 and the hot water storage tank 2 to form a circulation loop. Specifically, any water inlet 4 and any water outlet 5 are respectively connected to the water inlet pipe 6 and the water outlet pipe 7, and the above-mentioned water inlet 4 and water outlet 5 are located on the same side, which is convenient for laying pipelines. Moreover, the multiple water tanks 3 are individually connected to the water inlet pipe 6 and the water outlet pipe 7 through pipelines, and in order to be able to control the water inlet and water outlet of the water tank 3, valves 13 are installed on the pipelines between the water tank 3 and the water inlet pipe 6 and the water outlet pipe 7, which can control the water flow in and out of the water tank 3, and can also control each water tank 3 individually, and open all or individually the corresponding water tanks 3 according to specific temperature requirements.

[0034] Based on the above structure, combined with Figure 2 and Figure 3 In order to improve the efficiency of heat exchange in the water tank 3 and make the water tank 3 have a certain thermal insulation capacity, a heat exchange coil 15 is arranged in the water tank 3, and both ends of the heat exchange coil 15 extend out of the water tank 3 and are connected with the water inlet pipe 6 and the water outlet pipe 7. The water tank 3 outside the heat exchange coil 15 is filled with water, and the heated water flows into the heat exchange coil 15 to heat the water in the water tank 3, so that the water tank 3 has the ability of heat storage and insulation.

[0035] Secondly, another water inlet 4 and another water outlet 5 of the hot water storage tank 2 are respectively connected to the water outlet end 8 and the water inlet end 9 of the solar collector 1, which are mainly used for the water of the solar collector 1 to enter the hot water storage tank 2 or the water of the hot water storage tank 2 to return to the solar collector 1, forming a circulation loop.

[0036] In order to transport the water from the solar collector 1 to the water tank 3, the water outlet pipe 7 is connected to a second circulation pump 11 and is located between the hot water tank 2 and the first water tank 3. The second circulation pump 11 provides pressure for the water to enter the water tank 3, and in order to transport the water from the hot water tank 2 back to the solar collector 1, a first circulation pump 10 is arranged on the pipeline between the water inlet end 9 and the water outlet 5. The first circulation pump 10 provides power for the water to return to the solar collector 1, and valves 13 are installed on both sides of the first circulation pump 10 and the second circulation pump 11 to control the water outlet of the hot water tank 2.

[0037] In this embodiment, the circulating water will have a certain loss during heating and flow. Therefore, in order to replenish water for the entire system, the water source 12 is connected to the end of the water inlet pipe 6 away from the hot water storage tank 2, and a valve 13 is provided between the water source 12. When the corresponding valve 13 is opened, the water source 12 can replenish water for the hot water storage tank 2 and the solar collector 1 through a water pump.

[0038] On the basis of the above structure, when water is first passed through the entire system or when the water needs to be replaced and the water in the system needs to be drained, when water is supplied to the solar collector 1, the hot water tank 2 and the water tank 3 again, the air in the internal components and pipes needs to be discharged first. Therefore, an exhaust valve 16 is installed on the water inlet pipe 6, and the exhaust valve 16 is located at the end of the water inlet pipe 6 away from the hot water tank 2. The internal air can be discharged by opening the exhaust valve 16.

[0039] In order to protect the outlet pipe 7, the inlet pipe 6 and other pipes when the temperature is extremely low, Figure 4 A pipe heater 14 is connected to the water outlet pipe 7. The pipe heater 14 is a purchased part and is installed between the second circulation pump 11 and the first water tank 3. The pipe heater 14 can heat the water passing through here so that the subsequent outflowing water has a certain temperature to avoid freezing and cracking of the pipe.

[0040] The structure and connection method of the solar thermal storage component are described above. The inventor has used the thermal storage component in an existing solar greenhouse. The following is a specific description of the installation method of the solar thermal storage component and the solar greenhouse.

[0041] Combination Figure 5A solar greenhouse includes a greenhouse body 17, a part of the heat storage component is installed on the upper end of the greenhouse body 17, and a part of it is installed inside the greenhouse body 17. Specifically, the solar collector 1 is installed on the top of the greenhouse body 17, the hot water storage tank 2 and the water tank 3 are both arranged inside the greenhouse body 17, and the pipes such as the water inlet pipe 6 and the water outlet pipe 7 can be connected to the corresponding positions of the greenhouse body 17 through a bracket, and in order to provide suitable temperature for crops at different positions in the greenhouse body 17, multiple water tanks 3 are arranged at intervals in the greenhouse body 17, and the size of the intervals is between 10m-20m, which is determined according to the actual size of the greenhouse body 17.

[0042] After the installation of the above-mentioned heat storage component and the greenhouse body 17 is completed, the water source 12 connected to one end of the water inlet pipe 6 is used to supply water to the hot water tank 2 and the solar collector 1. When there is sufficient light, the solar collector 1 absorbs heat to heat the water inside it, and the water tank 3 in the greenhouse body 17 will also absorb part of the light heat, so that the water temperature inside it will not be too low. During the day, the first circulation pump 10 and the second circulation pump 11 and the valve 13 are started once or twice to circulate the water in the solar collector 1, heat the water in the water tank 3, convert part of the heat, and the water temperature continues until nighttime, and then the circulation pump is started once or twice to continue to circulate the hot water stored in the solar collector 1 during the day to heat the water in the water tank 3, thereby ensuring the temperature in the greenhouse body 17 at night, and the temperature continues to circulate during the daytime of the next day.

Claims

1. A solar thermal storage component, characterized in that: It comprises a solar thermal collector (1), a hot water storage tank (2) and a plurality of water tanks (3); The hot water storage tank (2) comprises two water inlets (4) and two water outlets (5), the hot water storage tank (2) is connected to a water inlet pipe (6) and a water outlet pipe (7), the two water inlets (4) are respectively connected to a water outlet end (8) of the solar thermal collector (1) and the water inlet pipe (6), and the two water outlets (5) are respectively connected to a water inlet end (9) of the solar thermal collector (1) and the water outlet pipe (7); The multiple water tanks (3) are individually connected to the water inlet pipe (6) and the water outlet pipe (7); A first circulation pump (10) is provided on the pipeline between the water inlet (9) and the water outlet (5), and the water outlet pipe (7) is connected to a second circulation pump (11) and is located between the hot water storage tank (2) and the first water tank (3).

2. The solar thermal storage assembly according to claim 1, characterized in that: One end of the water inlet pipe (6) away from the hot water storage tank (2) is connected to a water source (12), and a valve (13) is provided between the water inlet pipe and the water source (12).

3. The solar thermal storage assembly according to claim 1, characterized in that: The water outlet pipe (7) is connected to a pipeline heater (14).

4. The solar thermal storage assembly according to claim 3, characterized in that: The pipeline heater (14) is located between the second circulation pump (11) and the first water tank (3).

5. The solar thermal storage assembly according to claim 1, characterized in that: Valves (13) are installed on the pipelines between the water tank (3) and the water inlet pipe (6) and the water outlet pipe (7).

6. The solar thermal storage assembly according to claim 5, characterized in that: A heat exchange coil (15) is arranged in the water tank (3), and two ends of the heat exchange coil (15) are respectively connected to the water inlet pipe (6) and the water outlet pipe (7).

7. The solar thermal storage assembly according to claim 1, characterized in that: An exhaust valve (16) is installed on the water inlet pipe (6), and the exhaust valve (16) is located at one end of the water inlet pipe (6) away from the hot water storage tank (2).

8. The solar thermal storage assembly according to claim 1, characterized in that: The solar thermal collector (1) is a group of four connected junction box type thermal collectors.

9. A solar greenhouse, characterized in that: It comprises a greenhouse body (17) and a solar thermal storage assembly as claimed in any one of claims 1 to 8, wherein the solar thermal collector (1) is installed on the top of the greenhouse body (17), and the hot water storage tank (2) and the water tank (3) are both arranged inside the greenhouse body (17).

10. The solar greenhouse according to claim 9, characterized in that: A plurality of water tanks (3) are arranged at intervals in the greenhouse body (17), and the interval size is 10m-20m.

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