Third-generation hot air anti-freezing device

Abstract

The utility model discloses a third-generation hot air anti-freezing device which comprises a fan device. The fan device comprises a combustion chamber, one end of the combustion chamber is provided with an air supply fan, and the other end is provided with a guide plate connected with a heat conduction pipe; the heat conduction pipe is connected with a heat supply device, the heat supply device comprises a main pipe, two sides of the main pipe are respectively connected with a plurality of branch pipes, the branch pipes are connected with plant planting areas, and the main pipe and the branch pipes are provided with a plurality of heat supply through holes. Remote simultaneous frost prevention and freezing prevention of a plurality of plant planting areas can be achieved, frequent moving of the fan device through a moving device is not needed, labor cost is saved, and waste of labor cost and fuel resources of re-ignition caused by flameout and waiting for cooling of the fan device in order to prevent workers from being scalded by moving the fan device during combustion is not needed. The risk of frost damage and frostbite of vegetation due to the fact that the movable fan device cannot provide heat for the vegetation area in time is also avoided; and the heat can be accurately conveyed to the vegetation area needing the heat, and heat waste is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of antifreeze devices, and particularly relates to the third-generation hot air antifreeze device. Background Technology

[0002] Plant growth requires a balanced supply of nutrients such as sunlight, water, and soil. Tea trees, in particular, have relatively high climatic requirements; when exposed to frost, many tea trees will freeze to death and are unlikely to survive. With the development of agricultural technology, specialized intelligent frost protection systems have been developed for frost protection of tea trees, orchards, and winter greenhouse vegetables. This type of equipment is described in the authorized patent CN216018687U, a bidirectional 360-degree rotating frost protection machine. This patent discloses the frost protection structure, especially the 360-degree rotation, which improves the frost protection effect and provides better frost protection.

[0003] The first-generation hot air antifreeze device (application number 2025200433139) achieved dual-head, bidirectional hot air delivery with 360-degree rotation, improving anti-frost efficiency based on patent CN216018687U. The second-generation hot air antifreeze device (application number 2025202971244) refined the combustion device, adding a protective cover, air vents, air ducts, a fan, an air inlet, an air vent, a wind deflector, a small air duct, a windbreak grille, and other air intake components, significantly improving the hot air antifreeze device and making combustion and heat output more stable. To prevent interference from simultaneous air delivery to the ignition device from both directions after the efficiency improvement, the dual-head, bidirectional delivery of the first-generation hot air antifreeze device (application number 2025200433139) was replaced with a single head, but with 360-degree rotation. A pushing device was also added, allowing the second-generation hot air antifreeze device to be moved to any desired location at any time. However, the problem is that the heat generated by the second-generation hot air antifreeze device is directly scattered into the air, unable to be precisely directed to the required location, and cannot transport heat over long distances, resulting in heat waste. Although the second-generation hot air antifreeze device is equipped with a pushing device, it is relatively heavy. Frequent movement of the second-generation hot air antifreeze device while it is burning is very strenuous, requiring several people to operate, which increases labor costs. Furthermore, pushing it while it is burning is somewhat dangerous, and if it is extinguished, it needs to be relit, which also wastes labor and fuel resources. Moreover, pushing the second-generation hot air antifreeze device immediately after it is extinguished is also dangerous, while pushing it after it has cooled down results in a double waste of time and heat. Therefore, a third-generation hot air antifreeze device that can solve the above problems and transport heat over long distances is needed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing anti-frost machines, which, while efficient, require multiple units to operate simultaneously, and the continuous operation of heating equipment incurs significant costs. Furthermore, these machines are ineffective at preventing frost when the overall ambient temperature is low. To address these issues, we have invented a third-generation hot air anti-frost device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The third-generation hot air antifreeze device includes a fan unit;

[0007] The fan device includes a combustion chamber, one end of which is equipped with a blower fan, and the other end is equipped with a baffle plate, which is connected to a heat pipe.

[0008] The heat pipe is connected to a heat delivery device, which includes a main pipe and several branch pipes connected to both sides of the main pipe. The branch pipes are connected to a plant planting area, and several heat delivery holes are provided on both the main pipe and the branch pipes.

[0009] Furthermore, the combustion temperature of the combustion chamber is between 0 and 2000 degrees Celsius.

[0010] Furthermore, the guide plate is detachably connected to the heat pipe.

[0011] Furthermore: both the main pipe and the branch pipe are made of Oxford cloth.

[0012] Furthermore: the plant cultivation area is a greenhouse.

[0013] Furthermore: the heat delivery through hole is located on the lower surface of the main pipe and the branch pipe.

[0014] Furthermore, a moving device is installed at the bottom of the fan unit.

[0015] Furthermore: both the main pipe and the branch pipe are cylindrical, and the diameter of the main pipe is larger than the diameter of the branch pipe.

[0016] Furthermore: the branch pipe extends into several smaller pipes, which are evenly distributed above the planting greenhouse.

[0017] Furthermore: the main pipe diameter is 40 cm to 70 cm, the branch pipe diameter is 20 cm to 40 cm, and the small pipe diameter is 20 cm to 40 cm.

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

[0019] This utility model relates to a third-generation hot air antifreeze device, which includes a fan device.

[0020] The fan unit includes an ignition device at one end and an air supply device at the other end;

[0021] The ignition device includes an ignition element and an oil supply element for supplying oil during ignition; the ignition device is covered with a protective cover for wind protection and air supply, the protective cover is covered with air vents, and the protective cover extends from the ignition device to the air supply device.

[0022] The air supply device includes an air supply duct, one end of which is close to the ignition element, and the other end of which is connected to an air supply fan. The air supply fan is connected to an air inlet, which has an air inlet hole embedded in it, a windproof plate, and a small air supply tube.

[0023] 1. It can achieve simultaneous frost and freezing protection for multiple plant planting areas over a long distance, eliminating the need for frequent movement of the fan equipment and saving labor costs.

[0024] 2. There is no need to shut down the fire and wait for the fan to cool down in order to avoid burns to staff when moving the fan during combustion, which would result in labor costs and waste of fuel resources for restarting the fire.

[0025] 3. It also avoids the risk of vegetation being damaged by freezing due to the inability of mobile fan devices to provide heat to the vegetation area in a timely manner.

[0026] 4. Moreover, the heat can be precisely delivered to the vegetation area that needs the heat, without wasting heat. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the third-generation hot air antifreeze device of this utility model;

[0028] Figure 2 This is a schematic diagram of the overall structure of the fan device of this utility model;

[0029] Figure 3 This is a schematic diagram of the overall structure of the heat delivery device of this utility model;

[0030] Figure 4 This is a schematic diagram of the main pipe, branch pipes, and heat delivery through-holes of this utility model;

[0031] Figure 5 This is a schematic diagram of the main tube, the small tube, and the plant planting area of ​​this utility model.

[0032] The diagram is marked as follows:

[0033] 1-Combustion chamber, 2-Exhaust fan, 3-Baffle plate, 4-Heat pipe;

[0034] 5-Heat delivery device, 51-Main pipe, 52-Branch pipe, 53-Heat delivery through hole, 54-Small pipe;

[0035] 6-Planting area;

[0036] 7-Mobile devices. Detailed Implementation

[0037] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] Furthermore, features specified as "first" or "second" may explicitly or implicitly include one or more of those features, used to distinguish and describe features, without any order or emphasis. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] Reference Figure 1-5 The third-generation hot air antifreeze device includes a fan unit;

[0042] The fan unit includes a combustion chamber 1, a blower fan 2 is installed at one end of the combustion chamber 1, a guide plate 3 is installed at the other end, and a heat pipe 4 is connected to the guide plate 3;

[0043] The heat pipe 4 is connected to a heat delivery device 5, which includes a main pipe 51. Several branch pipes 52 are connected to both sides of the main pipe 51. The branch pipes 52 are connected to the plant planting area 6. Several heat delivery holes 53 are provided on both the main pipe 51 and the branch pipes 52.

[0044] Further preferred: The combustion temperature of combustion chamber 1 is 0 to 2000 degrees.

[0045] Further preferred: the guide plate 3 and the heat pipe 4 are detachably connected.

[0046] Further preferred design: Both the main tube 51 and the branch tube 52 are made of Oxford cloth.

[0047] Further optimization: Planting area 6 is a planting greenhouse.

[0048] A further preferred embodiment: the heat delivery through-hole 53 is located on the lower surface of the main pipe 51 and the branch pipe 52.

[0049] A further preferred embodiment: a moving device 7 is installed at the bottom of the fan unit.

[0050] Further preferred design: Both the main pipe 51 and the branch pipe 52 are cylindrical, and the diameter of the main pipe 51 is larger than the diameter of the branch pipe 52.

[0051] A further preferred embodiment: the branch pipe 52 extends into several smaller pipes 54, which are evenly distributed above the planting greenhouse.

[0052] Further preferred configurations include: main pipe 51 with a diameter of 40 cm to 70 cm, branch pipe 52 with a diameter of 20 cm to 40 cm, and small pipe 54 with a diameter of 20 cm to 40 cm.

[0053] The basic working principle of this utility model is as follows: During operation, the combustion chamber 1 of the fan device burns, and the heat generated is cooled by the cold air sent in by the blower fan 2. Then, the motor sends it out in the form of hot air through the main pipe 51, and then through the main pipe 51 to the branch pipes 52. Finally, through the branch pipes 52, it is sent to the plant planting area 6 that needs heat for frost protection to complete the frost protection.

[0054] Example 1:

[0055] During operation, combustion occurs in the combustion chamber 1 of the blower unit, generating heat with a temperature ranging from 0 to 2000 degrees Celsius, typically between 1000 and 1500 degrees Celsius, and usually maintained at 1100 to 1200 degrees Celsius. A blower fan 2 installed at one end of the combustion chamber 1 serves to both supply air to aid combustion during ignition and cool the heat generated by combustion, reducing the temperature from the usual 1100 to 1200 degrees Celsius to 30 to 40 degrees Celsius.

[0056] Here is a detailed explanation of the cooling process: This device is a third-generation hot air antifreeze device. It is designed to prevent plants from freezing to death in extremely cold weather, especially in winter. Therefore, this device is used when the weather is relatively cold, especially in the cold winter when the temperature drops to several degrees or tens of degrees below zero. It is used for frost and antifreeze purposes in greenhouses. When the combustion chamber 1 generates heat at a temperature of 0 to 2000 degrees Celsius, the fan 2 continuously blows cold air from outside into the combustion chamber 1, which can quickly lower the temperature of the combustion chamber 1. At the same time, to prevent the temperature of the combustion chamber 1 from being too high and burning the heat delivery device 5, a heat conduction pipe of about 1 meter is specially installed. With the support of the heat conduction pipe 4 and the very low temperature of the cold air, the heat can be reduced to 30 to 40 degrees Celsius when it is delivered to the heat delivery device 5.

[0057] The main tube 51, branch tube 52, and small tube 54 are all made of Oxford cloth and are evenly distributed above the vegetation and fixed in place. When the third-generation hot air antifreeze device has a power of 2KW and a motor voltage of 220V to 380V, the main pipe 51 has a diameter of 40 cm, and the branch pipes 52 and small pipes 54 each have a diameter of 20 cm. The motor blows heat to the main pipe 51 in the form of hot air. While ensuring that the main pipe 51, each branch pipe 52, and each small pipe 54 have hot air output from beginning to end, the main pipe 51, branch pipes 52, and small pipes 54 themselves are not insulated. Therefore, the hot air dissipates heat to the vegetation during the process of being transported through the main pipe 51, branch pipes 52, and small pipes 54, thus performing frost and antifreeze work. At the same time, the lower surface of the main pipe 51, branch pipes 52, and small pipes 54 is provided with heat delivery holes 53. Under the action of the transport air pressure, the hot air will be sent out through the heat delivery holes 53, so that the hot air falls directly on the vegetation and diffuses to the surroundings under the action of air pressure, thus protecting or supplementing the surrounding vegetation with heat. The frost-resistant vegetation area is 1000 square meters, and the heat output is 17000 square meters per hour. The total length of the main pipe 51, branch pipes 52, and small pipes 54 is over 200 meters.

[0058] When the fan unit is placed outdoors for hot air delivery, the main pipe 51 mainly plays the role of heat delivery. Its main function is to deliver hot air to the branch pipes 52 and small pipes 54 placed above the vegetation for frost and freezing prevention. Therefore, in this case, the heat delivery hole 53 on the main pipe 51 will be closed to prevent the temperature of the main pipe 51 from dropping too much during the heat delivery process and to prevent hot air from leaking out.

[0059] The guide plate 3 and the heat pipe 4 are detachably connected. When it is confirmed that the heat pipe 4 is not needed for cooling buffering, the heat pipe 4 can be directly removed so that the heat delivery device 5 is directly connected to the port of the guide plate 3 so that the hot air is delivered at the fastest and best temperature.

[0060] The above can achieve simultaneous frost and freeze protection for multiple planting areas over a long distance; it eliminates the need for frequent movement of the fan device, saving labor costs and avoiding the labor costs and fuel waste caused by extinguishing the fire and waiting for the fan device to cool down to avoid burns to workers during combustion; it also avoids the risk of vegetation being damaged by frost due to the mobile fan device not providing heat to the vegetation area in time; and the heat can be accurately delivered to the vegetation area that needs heat, without causing heat waste.

[0061] Example 2:

[0062] During operation, combustion occurs in the combustion chamber 1 of the blower unit, generating heat with a temperature ranging from 0 to 2000 degrees Celsius, typically between 1000 and 1500 degrees Celsius, and usually maintained at 1100 to 1200 degrees Celsius. A blower fan 2 installed at one end of the combustion chamber 1 serves to both supply air to aid combustion during ignition and cool the heat generated by combustion, reducing the temperature from the usual 1100 to 1200 degrees Celsius to 30 to 40 degrees Celsius.

[0063] Here is a detailed explanation of the cooling process: This device is a third-generation hot air antifreeze device. It is designed to prevent plants from freezing to death in extremely cold weather, especially in winter. Therefore, this device is used when the weather is relatively cold, especially in the cold winter when the temperature drops to several degrees or tens of degrees below zero. It is used for frost and antifreeze purposes in greenhouses. When the combustion chamber 1 generates heat at a temperature of 0 to 2000 degrees Celsius, the fan 2 continuously blows cold air from outside into the combustion chamber 1, which can quickly lower the temperature of the combustion chamber 1. At the same time, to prevent the temperature of the combustion chamber 1 from being too high and burning the heat delivery device 5, a heat conduction pipe of about 1 meter is specially installed. With the support of the heat conduction pipe 4 and the very low temperature of the cold air, the heat can be reduced to 30 to 40 degrees Celsius when it is delivered to the heat delivery device 5.

[0064] The main tube 51, branch tube 52, and small tube 54 are all made of Oxford cloth and are evenly distributed above the vegetation and fixed in place. When the third-generation hot air antifreeze device has a power of 4KW and the motor voltage is 220V to 380V, the main pipe 51 has a diameter of 50 cm, and the branch pipes 52 and small pipes 54 all have a diameter of 30 cm. The motor blows heat to the main pipe 51 in the form of hot air. While ensuring that the main pipe 51, each branch pipe 52, and each small pipe 54 have hot air output from beginning to end, the main pipe 51, branch pipes 52, and small pipes 54 themselves are not insulated. Therefore, the hot air dissipates heat to the vegetation during the process of being transported through the main pipe 51, branch pipes 52, and small pipes 54, thus performing frost and antifreeze work. At the same time, the lower surface of the main pipe 51, branch pipes 52, and small pipes 54 is provided with heat delivery holes 53. Under the action of the transport air pressure, the hot air will be sent out through the heat delivery holes 53, so that the hot air falls directly on the vegetation and diffuses to the surroundings under the action of air pressure, thus protecting or supplementing the surrounding vegetation with heat. The frost-resistant vegetation area is 2000 square meters, and the heat output is 23000 square meters per hour. The total length of the main pipe 51, branch pipes 52, and small pipes 54 is over 400 meters.

[0065] When the fan unit is placed outdoors for hot air delivery, the main pipe 51 mainly plays the role of heat delivery. Its main function is to deliver hot air to the branch pipes 52 and small pipes 54 placed above the vegetation for frost and freezing prevention. Therefore, in this case, the heat delivery hole 53 on the main pipe 51 will be closed to prevent the temperature of the main pipe 51 from dropping too much during the heat delivery process and to prevent hot air from leaking out.

[0066] The guide plate 3 and the heat pipe 4 are detachably connected. When it is confirmed that the heat pipe 4 is not needed for cooling buffering, the heat pipe 4 can be directly removed so that the heat delivery device 5 is directly connected to the port of the guide plate 3 so that the hot air is delivered at the fastest and best temperature.

[0067] The above can achieve simultaneous frost and freeze protection for multiple planting areas over a long distance; it eliminates the need for frequent movement of the fan device, saving labor costs and avoiding the labor costs and fuel waste caused by extinguishing the fire and waiting for the fan device to cool down to avoid burns to workers during combustion; it also avoids the risk of vegetation being damaged by frost due to the mobile fan device not providing heat to the vegetation area in time; and the heat can be accurately delivered to the vegetation area that needs heat, without causing heat waste.

[0068] Example 3:

[0069] During operation, combustion occurs in the combustion chamber 1 of the blower unit, generating heat with a temperature ranging from 0 to 2000 degrees Celsius, typically between 1000 and 1500 degrees Celsius, and usually maintained at 1100 to 1200 degrees Celsius. A blower fan 2 installed at one end of the combustion chamber 1 serves to both supply air to aid combustion during ignition and cool the heat generated by combustion, reducing the temperature from the usual 1100 to 1200 degrees Celsius to 30 to 40 degrees Celsius.

[0070] Here is a detailed explanation of the cooling process: This device is a third-generation hot air antifreeze device. It is designed to prevent plants from freezing to death in extremely cold weather, especially in winter. Therefore, this device is used when the weather is relatively cold, especially in the cold winter when the temperature drops to several degrees or tens of degrees below zero. It is used for frost and antifreeze purposes in greenhouses. When the combustion chamber 1 generates heat at a temperature of 0 to 2000 degrees Celsius, the fan 2 continuously blows cold air from outside into the combustion chamber 1, which can quickly lower the temperature of the combustion chamber 1. At the same time, to prevent the temperature of the combustion chamber 1 from being too high and burning the heat delivery device 5, a heat conduction pipe of about 1 meter is specially installed. With the support of the heat conduction pipe 4 and the very low temperature of the cold air, the heat can be reduced to 30 to 40 degrees Celsius when it is delivered to the heat delivery device 5.

[0071] The main tube 51, branch tube 52, and small tube 54 are all made of Oxford cloth and are evenly distributed above the vegetation and fixed in place. When the third-generation hot air antifreeze device has a power of 5.5KW and a motor voltage of 220V to 380V, the main pipe 51 has a diameter of 65 cm, and the branch pipes 52 and small pipes 54 all have a diameter of 40 cm. The motor blows heat to the main pipe 51 in the form of hot air. While ensuring that the main pipe 51, each branch pipe 52, and each small pipe 54 have hot air output from beginning to end, the main pipe 51, branch pipes 52, and small pipes 54 themselves are not insulated. Therefore, the hot air dissipates heat to the vegetation during the process of being transported through the main pipe 51, branch pipes 52, and small pipes 54, thus performing frost and antifreeze work. At the same time, the lower surface of the main pipe 51, branch pipes 52, and small pipes 54 is provided with heat delivery holes 53. Under the action of the transport air pressure, the hot air will be sent out through the heat delivery holes 53, so that the hot air falls directly on the vegetation and diffuses to the surroundings under the action of air pressure, thus protecting or supplementing the surrounding vegetation with heat. The frost-resistant vegetation area is 3500 square meters, and the heat output is 35000 square meters per hour. The total length of the main pipe 51, branch pipes 52, and small pipes 54 is over 600 meters.

[0072] When the fan unit is placed outdoors for hot air delivery, the main pipe 51 mainly plays the role of heat delivery. Its main function is to deliver hot air to the branch pipes 52 and small pipes 54 placed above the vegetation for frost and freezing prevention. Therefore, in this case, the heat delivery hole 53 on the main pipe 51 will be closed to prevent the temperature of the main pipe 51 from dropping too much during the heat delivery process and to prevent hot air from leaking out.

[0073] The guide plate 3 and the heat pipe 4 are detachably connected. When it is confirmed that the heat pipe 4 is not needed for cooling buffering, the heat pipe 4 can be directly removed so that the heat delivery device 5 is directly connected to the port of the guide plate 3 so that the hot air is delivered at the fastest and best temperature.

[0074] The above can achieve simultaneous frost and freeze protection for multiple planting areas over a long distance; it eliminates the need for frequent movement of the fan device, saving labor costs and avoiding the labor costs and fuel waste caused by extinguishing the fire and waiting for the fan device to cool down to avoid burns to workers during combustion; it also avoids the risk of vegetation being damaged by frost due to the mobile fan device not providing heat to the vegetation area in time; and the heat can be accurately delivered to the vegetation area that needs heat, without causing heat waste.

[0075] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0076] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A third-generation hot air antifreeze device, characterized in that: Including fan units; The fan device includes a combustion chamber (1), one end of which is equipped with a blower fan (2), and the other end is equipped with a guide plate (3), and the guide plate (3) is connected to a heat pipe (4); The heat pipe (4) is connected to a heat delivery device (5). The heat delivery device (5) includes a main pipe (51), and several branch pipes (52) are connected to both sides of the main pipe (51). The branch pipes (52) are connected to a plant planting area (6). Several heat delivery through holes (53) are provided on both the main pipe (51) and the branch pipes (52).

2. The third-generation hot air antifreeze device according to claim 1, characterized in that: The combustion temperature of the combustion chamber (1) is 0 to 2000 degrees.

3. The third-generation hot air antifreeze device according to claim 1, characterized in that: The guide plate (3) is detachably connected to the heat pipe (4).

4. The third-generation hot air antifreeze device according to claim 1, characterized in that: Both the main tube (51) and the branch tube (52) are made of Oxford cloth.

5. The third-generation hot air antifreeze device according to claim 1, characterized in that: The plant planting area (6) is a planting greenhouse.

6. The third-generation hot air antifreeze device according to claim 1, characterized in that: The heat delivery through hole (53) is located on the lower surface of the main pipe (51) and the branch pipe (52).

7. The third-generation hot air antifreeze device according to claim 1, characterized in that: A moving device (7) is installed at the bottom of the fan unit.

8. The third-generation hot air antifreeze device according to claim 1, characterized in that: Both the main pipe (51) and the branch pipe (52) are cylindrical, and the diameter of the main pipe (51) is larger than the diameter of the branch pipe (52).

9. The third-generation hot air antifreeze device according to claim 5, characterized in that: The branch pipe (52) extends into several smaller pipes (54), which are evenly distributed above the planting greenhouse.

10. The third-generation hot air antifreeze device according to claim 9, characterized in that: The main pipe (51) has a diameter of 40 cm to 70 cm, the branch pipe (52) has a diameter of 20 cm to 40 cm, and the small pipe (54) has a diameter of 20 cm to 40 cm.

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