A greenhouse soil warming system

Abstract

The utility model discloses a greenhouse soil temperature rising system, it includes a support frame, and is set up with single group or multiple sets of heat collection group through support frame, it still includes several greenhouses, and is provided with air duct below 0.8 meters from ground surface in greenhouse, both ends of air duct all are provided with the connecting port, the heat collection group includes the header tank of left and right sides and the header tank of setting up several solar energy heat collection pipes in two, is provided with the air inlet pipe on the header tank of one end on the heat collection group of left and right ends, and the header tank of the other end is connected with the fan through the return air pipe, the connecting port of both ends of air duct is connected with air inlet pipe and fan respectively. The device can not only improve the temperature in the shed, but also can realize the improvement of ground surface temperature, and the soil of this kind of temperature adaptation further improves the crop growth environment, promotes the growth of crop root system, and improves the crop yield.

Description

Technical Field

[0001] This utility model relates to the field of greenhouse planting technology, and in particular to a greenhouse soil heating system. Background Technology

[0002] As is well known, in existing technologies, greenhouses used for agricultural planting or animal breeding are mostly heated in winter by sunlight. This method of relying solely on sunlight is more suitable for sun-facing greenhouses, where the sun-facing side is a translucent film and the shaded side is an insulating wall. At night, covering the translucent film with quilts or felts can achieve good insulation. However, for arched greenhouses, the entire ground area is covered with a translucent film, making it impossible to lay quilts or felts, and there is no insulating wall on the shaded side. This design cannot guarantee a high temperature at night in winter, and can only achieve heating through indoor heating equipment or air conditioning systems. However, such heating equipment consumes a lot of energy, resulting in higher costs for planting or breeding.

[0003] Furthermore, existing greenhouses all use air heating, which cannot raise the ground temperature quickly. Especially in planting greenhouses, raising the ground temperature can directly improve the growth of crops, and current planting technology cannot improve this technical problem. Summary of the Invention

[0004] In view of the above ideas, the purpose of this utility model is to provide a greenhouse soil heating system that can use solar energy for heating. The solar-heated airflow circulates below the ground surface, and the high-temperature airflow heats the soil, thereby increasing the soil temperature.

[0005] A greenhouse soil heating system includes a support frame on which one or more heat collection groups are mounted; it also includes several greenhouses, with air ducts installed inside the greenhouses at a depth of 0.5 meters below the ground surface, and connection ports at both ends of the air ducts. The solar collector assembly includes headers on the left and right sides and several solar collector tubes arranged between the two headers; on the solar collector assembly located at the left and right ends, an air inlet pipe is provided on the header at one end, and a fan is connected to the header at the other end through a return air pipe. The connection ports at both ends of the air duct are connected to the air inlet pipe and the fan, respectively.

[0006] A heat exchanger is connected in parallel to the pipe used to connect the fan. The heat exchanger is connected to the water storage tank via a circulating pump. The water storage tank is equipped with a water supply pipe and a water supply pump. An external water supply pipe is also installed on the water storage tank. A main spray pipe is installed on the greenhouse shed. The main spray pipe extends into the greenhouse shed and is equipped with several spray branch pipes. Several atomizing nozzles are installed on the spray branch pipes. The water supply pipe is connected to the main spray pipe to supply water.

[0007] The air ducts are evenly distributed in the soil below the greenhouse, and the outer surface of the air ducts is covered or wrapped with a waterproof blanket to prevent soil moisture from seeping into the air ducts.

[0008] The lower part of the air duct is covered with a waterproof layer, which enables the entire lower part of the greenhouse to be waterproofed.

[0009] The heat exchanger is a wind-water heat exchanger, which includes an internal cavity with a left-right open structure. The front and rear ends of the cavity are respectively provided with a front chamber and a rear chamber. The upper and lower parts of the front chamber or the rear chamber are respectively a water inlet chamber and a water return chamber. The front chamber and the rear chamber are connected by several through pipes.

[0010] The solar collector tube is a double-layer tube structure, consisting of an outer tube and an inner tube. The outer tube and the inner tube are fused together at their ends. The inner tube has a process groove to prevent deformation of the inner tube and the outer tube when heated.

[0011] This invention offers the following advantages: Through its design, a fixed outdoor heat collection group is installed. High-temperature heat extraction is achieved by setting solar collector tubes within the group. The heat is then channeled to air ducts beneath the greenhouse, heating the surface soil and thus raising the soil temperature. This temperature increase, combined with irradiation from a translucent membrane, further enhances the greenhouse's internal temperature. This device not only raises the greenhouse temperature but also increases the surface soil temperature. This optimal soil temperature further improves the crop growth environment, promotes root growth, and increases crop yield. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 A top-view diagram showing the structure of the air ducts laid under the greenhouse. Figure 3 A schematic diagram of the main cross-section structure of the air duct laid in the lower part of the greenhouse; Figure 4 This is a schematic diagram of the main structure of a feng shui heat exchanger. Figure 5This is a schematic diagram of the front compartment structure of the air-water heat exchanger. Figure 6 This is a schematic diagram of the rear compartment structure of the air-water heat exchanger. 1. Support frame; 2. Solar collector assembly; 21. Solar collector tube; 22. Manifold; 221. Air inlet duct; 222. Air return duct; 3. Water storage tank; 31. External water supply pipe; 32. Circulation pump; 33. Water supply pump; 34. Water supply pipe; 4. Fan; 41. Branch pipe I; 42. Heat exchange switch; 43. Branch pipe II; 44. Heating switch; 5. Air-water heat exchanger; 51. Air inlet; 52. Air outlet. 53. Air inlet, 54. Water inlet, 55. Water return chamber, 56. Rear chamber, 57. Through pipe, 58. Internal cavity; 6. Greenhouse, 61. Door, 62. Air duct, 63. Air inlet connection, 64. Air return connection, 65. Upper soil, 66. Waterproof layer, 67. Lower soil, 68. Waterproof layer; 7. Main spray pipe, 71. Spray branch pipe, 72. Atomizing nozzle. Detailed Implementation

[0014] The present invention will be described in detail below. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification.

[0015] Example 1: The purpose of this utility model is to provide a greenhouse soil heating system, as shown in the attached figure. It includes a support frame 1, on which multiple sets of heat collection groups 2 are mounted. The multiple sets of heat collection groups 2 are connected in series. It also includes several greenhouses 6. In this example, an independent design of one greenhouse 6 is adopted. Inside the greenhouse 6, a wind duct 62 is laid flat 0.8 meters above the ground. The soil 65 above is about 0.8 meters thick. This area is used for vegetable planting.

[0016] Both ends of the air duct 62 are provided with connection ports, namely air inlet connection port 63 and air return connection port 64. In order to achieve better heat preservation, a waterproof layer 68 is laid at the bottom of the air duct 62. The waterproof layer 68 can achieve the waterproof design of the entire lower part of the greenhouse 6.

[0017] The ventilation ducts 62 are evenly distributed in the soil below the greenhouse 6. The outer surface of the ventilation ducts 62 is covered with a waterproof blanket 66 to prevent soil moisture from seeping into the ventilation ducts 62. A grooved waterproof layer 68 is set about 0.5 meters below the ventilation ducts 62. It works together with the waterproof blanket 66 to achieve a better moisture retention effect.

[0018] This utility model includes left and right headers 22 and multiple solar collector tubes 21 evenly distributed between the two headers in each collector group 2. On the collector groups 2 located at the left and right ends, an air inlet pipe 221 is provided on the header at one end. The air inlet pipe 221 is used to connect to the return air connection port 64 of the air duct 62 to draw the heat-exchanged air into the equipment for reheating. A fan 4 is connected to the header 22 at the other end through the return air pipe 222. The fan 4 can realize the circulation control of the air speed inside the multiple collector groups 2. By controlling the air speed, the residence time of the air inside the multiple collector groups 2 can be realized, and the heating rate can be further adjusted.

[0019] The solar collector tube 21 has a double-layer tube structure, which includes an outer tube and an inner tube. The outer tube and the inner tube are fused together at the ends. The inner tube is provided with a process groove to prevent deformation of the inner tube and the outer tube when heated.

[0020] With the above structural setup, the airflow can be circulated and blown into the greenhouse 6 by the fan 4 to increase the internal temperature. This not only increases the ground temperature but also indirectly adjusts the air temperature in the form of underfloor heating.

[0021] Example 2: Based on the structure of the example, when this device is used to adjust the internal temperature of greenhouse 6, because it adjusts the ground temperature, the increased ground temperature will promote the evaporation and loss of surface moisture, especially during the ventilation process of the greenhouse, this phenomenon of moisture loss as heat is more obvious. Therefore, it will lead to dry air inside greenhouse 6, affecting the growth of crop leaves or fruits. To improve this problem, this utility model also adjusts the air humidity inside greenhouse 6 through spraying; the specific solution is as follows: This utility model has a heat exchanger connected in parallel to the pipe connecting the fan 4. The heat exchanger is a wind-water heat exchanger 5. With this design, branch pipe I 41 and branch pipe II 43 are connected in parallel at the air outlet of the fan 4. A heating switch 44 is installed on branch pipe I 41. Heating is achieved in the greenhouse 6 through the cooperation of branch pipe I 41 and heating switch 44. A heat exchange switch 42 is installed on branch pipe II 43. Heat is supplied to the wind-water heat exchanger 5 through heat exchange switch 42, and then heat is supplied to the greenhouse 6.

[0022] The air-water heat exchanger 5 is connected to the water storage tank 3 via a circulation pump 32; the water storage tank 3 is equipped with a water supply pipe 34 and a water supply pump 33; the water storage tank 3 is also equipped with an external water supply pipe 31; the greenhouse 6 is equipped with a main spray pipe 7, which extends into the interior of the greenhouse 6 and is equipped with several spray branch pipes 71, each of which is equipped with several atomizing nozzles 72; the water supply pipe 34 is connected to the main spray pipe 7 to supply water.

[0023] Users can install a thermometer in the water storage tank 3 to control the amount of water introduced through the external water supply pipe 31, thereby adjusting the water temperature in the water storage tank 3. When the temperature is adjusted to within 20 degrees Celsius, the spray main pipe 7, spray branch pipe 71, and atomizing nozzle 72 work together to achieve atomized spraying, which humidifies the air environment inside the greenhouse 6. The spray water, heated by the air-water heat exchanger 5, not only moisturizes the plants but also maintains the air temperature inside the greenhouse 6, providing a stable humidity and temperature environment for plant growth.

[0024] This utility model also discloses a wind-water heat exchanger 5, such as Figure 4 , 5 As shown in Figure 6, the air-water heat exchanger 5 includes an internal cavity 58 with a left-right permeable structure. A front chamber and a rear chamber 56 are respectively located at the front and rear ends of the cavity. The front chamber is divided into upper and lower parts by a horizontal partition, namely an inlet chamber 54 and a return chamber 55. The front and rear chambers 56 are connected by several through pipes 57. The through pipes 57 are used to achieve longitudinal return flow of the liquid, and the left-right permeable internal cavity 58 is used to achieve crossflow of high-temperature gas. The high-temperature gas and liquid exchange heat within the air-water heat exchanger 5, thereby increasing and adjusting the water temperature.

[0025] In summary, this device can not only increase the temperature inside greenhouse 6, but also increase the surface temperature. This suitable soil temperature further improves the crop growth environment, promotes crop root growth, and increases crop yield.

Claims

1. A greenhouse soil heating system, characterized in that: It includes a support frame on which one or more sets of heat collection units are mounted; it also includes several greenhouses, with air ducts installed 0.5 meters below the ground surface inside the greenhouses, and connection ports at both ends of the air ducts. The solar collector assembly includes headers on the left and right sides and several solar collector tubes arranged between the two headers; an air inlet pipe is provided on the header at one end of the solar collector assembly located at the left and right ends, and a fan is connected to the header at the other end through a return air pipe; the connection ports at both ends of the air duct are connected to the air inlet pipe and the fan, respectively.

2. The greenhouse soil heating system as described in claim 1, characterized in that: A heat exchanger is connected in parallel to the pipe used to connect the fan. The heat exchanger is connected to the water storage tank via a circulating pump. The water storage tank is equipped with a water supply pipe and a water supply pump. An external water supply pipe is also installed on the water storage tank. A main spray pipe is installed on the greenhouse shed. The main spray pipe extends into the greenhouse shed and is equipped with several spray branch pipes. Several atomizing nozzles are installed on the spray branch pipes. The water supply pipe is connected to the main spray pipe to supply water.

3. The greenhouse soil heating system as described in claim 1, characterized in that: The air ducts are evenly distributed in the soil below the greenhouse, and the outer surface of the air ducts is covered or wrapped with a waterproof blanket.

4. The greenhouse soil heating system as described in claim 1, characterized in that: The lower part of the air duct is covered with a waterproof layer, which enables the entire lower part of the greenhouse to be waterproofed.

5. The greenhouse soil heating system as described in claim 2, characterized in that: The heat exchanger is a wind-water heat exchanger, which includes an internal cavity with a left-right open structure. The front and rear ends of the cavity are respectively provided with a front chamber and a rear chamber. The upper and lower parts of the front chamber or the rear chamber are respectively a water inlet chamber and a water return chamber. The front chamber and the rear chamber are connected by several through pipes.

6. The greenhouse soil heating system as described in claim 1, characterized in that: The solar collector tube is a double-layer tube structure, consisting of an outer tube and an inner tube. The outer tube and the inner tube are fused together at their ends. The inner tube has a process groove to prevent deformation of the inner tube and the outer tube when heated.

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