A circulating heat storage and temperature increasing device for a sunlight greenhouse

Abstract

The utility model discloses a kind of sunlight greenhouse circulating heat storage temperature increasing device, including hot air intake pipe, the hot air intake pipe is installed in the top of interior space of greenhouse, the hot air of ascending is extracted;Fan is communicated on the hot air intake pipe, fan outlet end is communicated with first hot air circulation pipe, and first hot air circulation pipe outlet end is communicated with second hot air circulation pipe;Soil heat exchange pipe is installed on the second hot air circulation pipe, and the quantity of soil heat exchange pipe is several and evenly arranged.The utility model has the advantages of environmental protection, solve the existing sunlight greenhouse in daytime, it is inconvenient to store and utilize the high temperature in room, but through ventilation or wall heat dissipation is lost to environment, cause the waste of heat energy, reduce the problem of energy utilization efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of heat exchange devices, specifically a circulating heat storage and heating device for a solar greenhouse. Background Technology

[0002] A solar greenhouse is an agricultural facility that relies primarily on solar radiation for lighting and heat storage, enabling off-season production of vegetables, flowers, and other crops with little or no heating during winter. During the day, the temperature and humidity inside a solar greenhouse are high, requiring cooling and ventilation to lower these levels and meet the plant's growing needs. A circulating heat storage and warming device for solar greenhouses addresses this issue by using fans to extract hot air from the greenhouse and circulating it through pipes within the soil.

[0003] Soil, as a heat storage medium, possesses good heat capacity and a certain degree of thermal conductivity, especially below 40 cm in depth, where temperature fluctuations are relatively small, making it suitable as a "thermal battery" for absorbing heat during the day and releasing it at night. Storing excess heat during the day underground through heat exchange between the air and soil, and then slowly releasing it at night, aligns with basic thermodynamic principles. Furthermore, using underground pipes as heat exchangers, allowing hot, humid air from the greenhouse to flow through the pipes and exchange heat with the surrounding soil via pipe walls, is a mature technological approach, similar to the buried pipe heat exchanger in a ground source heat pump, but without the need for refrigerant.

[0004] Existing solar greenhouses are not suitable for storing and utilizing the high temperatures inside during the day. Instead, the heat is dissipated into the environment through ventilation or heat dissipation through the walls, resulting in a waste of heat energy and a reduction in energy efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a circulating heat storage and heating device for solar greenhouses, which has the advantages of being environmentally friendly. It solves the problem that existing solar greenhouses are not convenient to store and utilize the high temperature inside during the day, but instead lose heat to the environment through ventilation or wall heat dissipation, resulting in waste of heat energy and reduced energy utilization efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a circulating heat storage and heating device for a solar greenhouse, comprising a hot air intake pipe, wherein the hot air intake pipe is installed at the top of the interior space of the greenhouse to extract rising hot air;

[0007] A fan is connected to the hot air inlet pipe, and a first hot air circulation pipe is connected to the outlet of the fan. A second hot air circulation pipe is connected to the outlet of the first hot air circulation pipe.

[0008] The second hot air circulation pipe is equipped with a soil heat exchange pipe. There are several soil heat exchange pipes arranged evenly. The air outlet of the soil heat exchange pipe is connected to a cold air exhaust pipe, and the air outlet of the cold air exhaust pipe extends to the bottom of the greenhouse interior space.

[0009] As a preferred embodiment of the circulating heat storage and heating device for a solar greenhouse according to this utility model, the surface of the hot air inlet pipe is provided with air inlet holes, and the number of air inlet holes is several.

[0010] As a preferred embodiment of the circulating heat storage and heating device for a solar greenhouse according to this utility model, the fan and the first hot air circulation pipe are installed on the side wall of the greenhouse interior.

[0011] As a preferred embodiment of the circulating heat storage and heating device for a solar greenhouse according to this utility model, the second hot air circulation pipe and the soil heat exchange pipe are installed in the soil inside the greenhouse at a depth of 40cm.

[0012] As a preferred embodiment of the circulating heat storage and heating device for a solar greenhouse according to this utility model, the air outlet of the fan is provided with an air volume control valve, which controls the air volume entering the first hot air circulation pipe.

[0013] As a preferred embodiment of the circulating heat storage and heating device for a solar greenhouse according to this utility model, it further includes a controller, the output end of which is electrically connected to the input end of the fan and the air volume control valve to control the fan and the air volume control valve.

[0014] As a preferred embodiment of the circulating heat storage and heating device for a solar greenhouse according to this utility model, the input terminal of the controller is electrically connected to a soil temperature sensor and an air temperature sensor.

[0015] As a preferred embodiment of the circulating heat storage and heating device for a solar greenhouse according to this utility model, the air temperature sensor is installed inside the greenhouse to detect the air temperature, and the soil temperature sensor is installed in the soil at the bottom of the greenhouse to detect the soil temperature.

[0016] As a preferred embodiment of the circulating heat storage and heating device for a solar greenhouse according to this utility model, the soil heat exchange pipe includes a heat-absorbing copper pipe, a heat-dissipating pipe is sleeved on the surface of the heat-absorbing copper pipe, and heat dissipating teeth are provided on the surface of the heat dissipating pipe, extending into the soil. The heat dissipating pipe and heat dissipating teeth are made of polyethylene material.

[0017] As a preferred embodiment of the circulating heat storage and heating device for a solar greenhouse according to this utility model, a water-permeable filter screen is installed at the bottom of the heat-absorbing copper pipe and the heat-dissipating pipe, and the condensate inside the heat-absorbing copper pipe enters the soil through the water-permeable filter screen.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model uses a fan to draw in the hot and humid air gathered at the top of the greenhouse through a hot air intake pipe, and then transports it through a first hot air circulation pipe and a second hot air circulation pipe to a soil heat exchange pipe buried 40cm deep in the soil. The soil heat exchange pipe dissipates heat, allowing the heat to be quickly stored in the deep soil. At the same time, the water condensed after the hot air cools seeps into the soil, achieving automatic water replenishment and humidification. Finally, the cold air is sent back to the bottom of the greenhouse through a cold air exhaust pipe, forming a stable airflow circulation, effectively reducing the indoor temperature and humidity during the day and alleviating the high temperature stress on crops.

[0020] 2. This utility model monitors environmental parameters in real time through air temperature sensors and soil temperature sensors. The controller automatically starts and stops the fan and adjusts the air volume control valve according to the preset threshold, so as to realize on-demand heat storage and precise control. After the system stops running at night, the heat stored in the soil during the day is slowly released through natural thermal radiation, which significantly increases the temperature of the greenhouse at night and reduces the temperature fluctuation between day and night. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present utility model. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 2 ;

[0023] Figure 3 This is a system block diagram of the present invention;

[0024] Figure 4 This is a cross-sectional view of the hot air intake pipe of this utility model;

[0025] Figure 5 This is a cross-sectional view of the soil heat exchanger tube of this utility model.

[0026] In the diagram: 1. Hot air inlet pipe; 2. First hot air circulation pipe; 3. Soil heat exchange pipe; 4. Second hot air circulation pipe; 5. Fan; 6. Cold air exhaust pipe; 7. Controller; 8. Air volume control valve; 9. Soil temperature sensor; 10. Air temperature sensor; 11. Air inlet; 301. Heat-absorbing copper pipe; 302. Heat dissipation pipe; 303. Heat dissipation teeth; 304. Water-permeable filter. Detailed Implementation

[0027] Please see Figures 1-5 A circulating heat storage and heating device for a solar greenhouse includes a hot air inlet pipe 1, which is installed at the top of the interior space of the greenhouse to extract rising hot air.

[0028] Furthermore, a fan 5 is connected to the hot air inlet pipe 1, and a first hot air circulation pipe 2 is connected to the outlet end of the fan 5. A second hot air circulation pipe 4 is connected to the outlet end of the first hot air circulation pipe 2.

[0029] Furthermore, a soil heat exchange pipe 3 is installed on the second hot air circulation pipe 4. There are several soil heat exchange pipes 3 arranged evenly. The air outlet of the soil heat exchange pipe 3 is connected to a cold air exhaust pipe 6. The air outlet of the cold air exhaust pipe 6 extends to the bottom of the greenhouse interior space.

[0030] Furthermore, the surface of the hot air intake pipe 1 is provided with air intake holes 11, and the number of air intake holes 11 is several.

[0031] Furthermore, the fan 5 and the first hot air circulation pipe 2 are installed on the side wall of the greenhouse.

[0032] Furthermore, the second hot air circulation pipe 4 and the soil heat exchange pipe 3 are installed inside the soil of the greenhouse at a depth of 40cm.

[0033] Furthermore, the air outlet of the fan 5 is equipped with an air volume control valve 8, which controls the air volume entering the first hot air circulation pipe 2.

[0034] Furthermore, it also includes a controller 7, the output of which is electrically connected to the input of the fan 5 and the air volume control valve 8, to control the fan 5 and the air volume control valve 8.

[0035] Furthermore, the input terminals of the controller 7 are electrically connected to a soil temperature sensor 9 and an air temperature sensor 10.

[0036] Furthermore, an air temperature sensor 10 is installed inside the greenhouse to detect the air temperature, and a soil temperature sensor 9 is installed in the soil at the bottom of the greenhouse to detect the soil temperature.

[0037] Furthermore, the soil heat exchange pipe 3 includes a heat-absorbing copper pipe 301, a heat-dissipating pipe 302 is sleeved on the surface of the heat-absorbing copper pipe 301, and heat dissipating teeth 303 are provided on the surface of the heat dissipating pipe 302. The heat dissipating teeth 303 extend into the soil, and the heat dissipating pipe 302 and the heat dissipating teeth 303 are made of polyethylene material.

[0038] Furthermore, a permeable filter screen 304 is installed at the bottom of the heat-absorbing copper pipe 301 and the heat-dissipating pipe 302, and the condensate inside the heat-absorbing copper pipe 301 enters the soil through the permeable filter screen 304.

[0039] When the temperature inside the greenhouse rises during the day, the hot and humid air gathered at the top of the greenhouse is drawn in through the hot air intake pipe 1 with several air inlets 11. The fan 5 starts and draws the hot air out of the hot air intake pipe 1 and sends it into the first hot air circulation pipe 2 through its outlet. The first hot air circulation pipe 2 transports the hot air to the second hot air circulation pipe 4. The second hot air circulation pipe 4 is connected to multiple soil heat exchange pipes 3 buried in the greenhouse soil at a depth of 40cm, so that the hot air enters the soil heat exchange pipes 3.

[0040] The soil heat exchange tube 3 includes an inner heat-absorbing copper tube 301, an outer heat-dissipating tube 302 made of graphite polyethylene material, and heat dissipation teeth 303 extending from the surface of the heat dissipating tube 302 into the surrounding soil. When hot air flows inside the heat-absorbing copper tube 301, the heat is efficiently conducted through the copper tube wall to the outer heat dissipating tube 302 and heat dissipation teeth 303, and then quickly diffused into the deep soil for storage. At the same time, the water condensed by the hot air after it cools down seeps into the surrounding soil through the water-permeable filter screen 304 at the bottom of the heat-absorbing copper tube 301, thereby achieving humidification.

[0041] After heat exchange, the cold air is discharged from the soil heat exchange pipe 3, flows into the cold air exhaust pipe 6, and is released from its outlet to the bottom of the greenhouse interior, forming a top-down air circulation. The entire process is regulated by the controller 7 based on the greenhouse air temperature detected by the air temperature sensor 10 and the soil temperature detected by the soil temperature sensor 9. When the air temperature exceeds the set threshold of 30°C and the soil temperature is not saturated, the controller 7 starts the fan 5 and adjusts the opening of the air volume control valve 8 to control the air volume entering the first hot air circulation pipe 2, thereby optimizing the heat storage efficiency. At night or when the temperature drops, the system stops operating, and the heat stored in the soil during the day is slowly released through natural thermal radiation, raising the greenhouse nighttime temperature and achieving a circulating temperature control effect of "storing heat during the day and releasing heat at night".

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A circulating heat storage and heating device for a solar greenhouse, comprising a hot air inlet pipe (1), characterized in that: The hot air intake pipe (1) is installed at the top of the greenhouse interior space to extract rising hot air; A fan (5) is connected to the hot air inlet pipe (1), and a first hot air circulation pipe (2) is connected to the outlet end of the fan (5). A second hot air circulation pipe (4) is connected to the outlet end of the first hot air circulation pipe (2). The second hot air circulation pipe (4) is equipped with a soil heat exchange pipe (3). There are several soil heat exchange pipes (3) arranged evenly. The air outlet of the soil heat exchange pipe (3) is connected to a cold air exhaust pipe (6). The air outlet of the cold air exhaust pipe (6) extends to the bottom of the greenhouse interior space.

2. The circulating heat storage and heating device for a solar greenhouse according to claim 1, characterized in that: The hot air intake pipe (1) has an air intake hole (11) on its surface, and the number of air intake holes (11) is several.

3. The circulating heat storage and heating device for a solar greenhouse according to claim 1, characterized in that: The fan (5) and the first hot air circulation pipe (2) are installed on the side wall of the greenhouse.

4. The circulating heat storage and heating device for a solar greenhouse according to claim 1, characterized in that: The second hot air circulation pipe (4) and soil heat exchange pipe (3) are installed in the soil inside the greenhouse at a depth of 40cm.

5. The circulating heat storage and heating device for a solar greenhouse according to claim 1, characterized in that: The air outlet of the fan (5) is equipped with an air volume control valve (8), which controls the air volume entering the first hot air circulation pipe (2).

6. The circulating heat storage and heating device for a solar greenhouse according to claim 5, characterized in that: It also includes a controller (7), the output of which is electrically connected to the input of the fan (5) and the air volume control valve (8) to control the fan (5) and the air volume control valve (8).

7. The circulating heat storage and heating device for a solar greenhouse according to claim 6, characterized in that: The input terminal of the controller (7) is electrically connected to a soil temperature sensor (9) and an air temperature sensor (10).

8. The circulating heat storage and heating device for a solar greenhouse according to claim 7, characterized in that: The air temperature sensor (10) is installed inside the greenhouse to detect the air temperature, and the soil temperature sensor (9) is installed in the soil at the bottom of the greenhouse to detect the soil temperature.

9. The circulating heat storage and heating device for a solar greenhouse according to claim 1, characterized in that: The soil heat exchange pipe (3) includes a heat-absorbing copper pipe (301), a heat-dissipating pipe (302) is sleeved on the surface of the heat-absorbing copper pipe (301), and heat dissipating teeth (303) are provided on the surface of the heat dissipating pipe (302). The heat dissipating teeth (303) extend into the soil. The heat dissipating pipe (302) and the heat dissipating teeth (303) are made of polyethylene material.

10. A circulating heat storage and heating device for a solar greenhouse according to claim 9, characterized in that: The bottom of the heat-absorbing copper tube (301) and the heat-dissipating tube (302) is equipped with a water-permeable filter (304), and the condensate inside the heat-absorbing copper tube (301) enters the soil through the water-permeable filter (304).

Images