Oxygen supplement and heat supply warm air mechanism of blueberry planting greenhouse
Through the reciprocating swing nozzle and PLC control system, the problem of uneven temperature in the blueberry planting greenhouse is solved, the uniform distribution of temperature and oxygen concentration is achieved, and the suitability of the blueberry planting environment is improved.
Patent Information
- Application Number
- CN202422466069.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-12
AI Technical Summary
The air direction of the existing oxygen replenishment equipment and heating and heating equipment in blueberry planting greenhouses is fixed, resulting in uneven temperature in the greenhouse and affecting the growth of blueberries.
The reciprocating swing nozzle and PLC control system are adopted to drive the nozzle to swing reciprocatingly by a motor, combining temperature and oxygen concentration sensors to dynamically adjust the air distribution to ensure temperature and oxygen uniformity.
The uniform distribution of temperature and oxygen concentration in the greenhouse is achieved, providing a suitable growth environment, and improving the growth conditions of blueberries.
Smart Images

Figure CN223157663U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of blueberry planting, in particular to an oxygen supplementing, heat supply and warm air mechanism for a blueberry planting greenhouse. Background Technique
[0002] Blueberry fruits are rich in nutrients, especially rich in anthocyanins. It not only has good nutritional and health care functions, but also has functions such as preventing brain nerve aging, strengthening the heart, anti-cancer, softening blood vessels, and enhancing human immunity. The earliest country to cultivate blueberries is the United States, but the cultivation history is less than a hundred years. Because of its high health care value, it has become popular all over the world and is one of the five healthy fruits recommended by the Food and Agriculture Organization of the United Nations. Currently, blueberries are usually planted in greenhouses. However, most of the existing blueberry planting greenhouses still have problems that need to be solved during use.
[0003] Most of the existing blueberry planting greenhouses are equipped with oxygen supplementing equipment and heat supply and warm air equipment. The oxygen supplementing equipment and heat supply and warm air equipment inhale the outside air into the greenhouse for oxygen supplementation and heat supply, so that the oxygen concentration and temperature in the greenhouse are within the range suitable for the growth of blueberries. However, the direction of the air blown by the oxygen supplementing equipment and heat supply and warm air equipment equipped in most of the existing greenhouses is fixed. During the process of oxygen supplementation and heat supply and warm air, the air always blows from top to bottom to one area of blueberries and then scatters everywhere. During the scattering process, part of the heat will be lost. Therefore, the temperature of the area near the air outlet is higher than that of the area far from the air outlet, resulting in uneven temperature in each area of the greenhouse, which will affect the growth of blueberries. Therefore, it is necessary to design an oxygen supplementing, heat supply and warm air mechanism for a blueberry planting greenhouse to solve the above problems. Content of the Utility Model
[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art, and to provide an oxygen supplementing, heat supply and warm air mechanism for a blueberry planting greenhouse.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] The cam is fixedly provided with a U-shaped plate on the inner wall of the cam, and a U-shaped plate is fixedly provided on the inner wall of the cam. The top of the U-shaped plate is fixedly provided with a motor, and the output end of the motor is fixedly provided with a first drive shaft, and the first drive shaft is fixedly provided with a disc on the side away from the motor, and the disc is fixedly provided with a sliding rod on the side away from the first drive shaft. The sliding rod is arranged on the edge of the disc, and the sliding rod sleeve is provided with a swing plate, and a straight groove is provided on the swing plate to match the sliding rod. The swing plate is rotatably connected to the U-shaped plate, and the U-shaped plate is provided with a groove at the position of the swing plate. The bottom of the swing plate is fixedly provided with a mounting plate, and the bottom of the mounting plate is fixedly provided with a nozzle. Due to the technical means of reciprocating swinging nozzle, the reciprocating swinging nozzle can The sprayed air can be quickly distributed to various areas in the greenhouse, preventing one area from being directly heated and having a high temperature. At the same time, the oxygen in the greenhouse can be quickly replenished, so that the oxygen concentration in each area is uniform. This effectively solves the problem mentioned in the background technology that the direction of the wind blown out by the oxygen replenishing equipment and heating and warming air equipment equipped in most greenhouses in the prior art is fixed. During the process of oxygen replenishment and heating and warming air, the air is always blown from top to bottom to the blueberries in one area and then dispersed everywhere. Some heat will be lost in the process of dispersion. Therefore, the temperature of the area close to the air outlet is higher than the temperature of the area far from the air outlet, resulting in uneven temperature in various areas of the greenhouse, which will affect the growth of blueberries. Therefore, the efficiency and effect of air dispersion are improved, the temperature and oxygen concentration in the greenhouse are guaranteed to be uniform, and a technical effect of providing a suitable environment for the growth of blueberries is achieved.
[0007] As a further solution of the present invention, two synchronous wheels are provided on the top of the U-shaped plate, and both of the synchronous wheels are sleeved with the same synchronous belt. One of the synchronous wheels is fixedly connected to the outer wall of the first drive shaft, and the synchronous wheel away from the first drive shaft is fixedly penetrated by the second drive shaft.
[0008] As a further solution of the present utility model, both sides of the second driving shaft are fixedly connected to the first bevel gear, and the two first bevel gears are meshed with the second bevel gear. The bottom of the second bevel gear is fixedly connected to the I-wheel, and the I-wheel is penetrated by the U-shaped plate, and the I-wheel is rotatably connected to the U-shaped plate. The bottom of the I-wheel is fixedly connected to a reciprocating screw, and the reciprocating screw is sleeved with a screw sleeve, and the reciprocating screw is sleeved with a screw sleeve. The inner circumferential surface of the screw sleeve is provided with a pin hole along its radial direction, and a crescent pin matching the reciprocating screw is provided in the pin hole. The outer wall of the screw sleeve is fixedly connected to a circular tube, and the outer wall of the top end of the circular tube is fixedly connected to a sleeve. The inner wall of the sleeve is slidably connected to a limit rod, and the limit rod is fixedly connected to the bottom of the U-shaped plate.
[0009] As a further solution of the utility model, a fixing plate is fixedly connected to the bottom of the round tube, and a temperature sensor and an oxygen concentration sensor are respectively and fixedly connected to both sides of the fixing plate.
[0010] As a further solution of the utility model, two first fixing seats and a second fixing seat are fixedly connected to the top of the U-shaped plate. The first fixing seat is sleeved on the second driving shaft, the second driving shaft is rotatably connected to the first fixing seat, the second fixing seat is sleeved on the first driving shaft, and the first driving shaft is rotatably connected to the second fixing seat.
[0011] As a further solution of the utility model, sliding rails are fixedly connected to the bottoms of both ends of the U-shaped plate. Sliders are arranged in the sliding rails, the sliders are slidably connected to the sliding rails, the sliders are fixedly connected to the mounting plate, and the positions where the sliders intersect with the swing plate and the U-shaped plate are the centers of circles.
[0012] As a further solution of the utility model, a blower and a hot air blower are installed on the top of the greenhouse body. Hoses are fixed at the air outlets of the blower and the hot air blower, the hoses on the blower and the hot air blower are communicated with the spray heads, a PLC control device is installed at the position of the opening and closing door of the greenhouse body, and the PLC control device on the greenhouse body is electrically connected to the blower, the hot air blower, the motor, the temperature sensor and the oxygen concentration sensor.
[0013] The beneficial effects of the utility model are as follows:
[0014] In the utility model: due to the technical means of the reciprocating swing spray head, the reciprocating swing spray head can enable the sprayed air to be quickly dispersed to each area in the greenhouse, avoiding the situation that one area is directly heated and has a relatively high temperature, and at the same time can quickly supplement the oxygen in the greenhouse, making the oxygen concentration in each area uniform, effectively solving the problem in the background technology that in most of the existing greenhouses, the blowing directions of the oxygen supplement equipment and the heating hot air equipment are fixed. During the process of oxygen supplement and heating hot air, the air always blows from top to bottom to the blueberries in one area and then disperses everywhere, and part of the heat will be lost during the dispersing process. Therefore, the temperature of the area near the air outlet is higher than that of the area far from the air outlet, resulting in uneven temperature in each area of the greenhouse and affecting the growth of blueberries. Furthermore, it realizes the technical effect of being able to improve the efficiency and effect of air dispersion, ensure uniform temperature and oxygen concentration in the greenhouse, and provide a suitable environment for the growth of blueberries. Description of the Drawings
[0015] Figure 1 It is a three-dimensional structural schematic diagram of an oxygen supplement and heating hot air mechanism for a blueberry planting greenhouse proposed by the utility model;
[0016] Figure 2Partial structural schematic diagram of an oxygen supplementing, heating and warm air mechanism for a blueberry planting greenhouse shed proposed by the present utility model;
[0017] Figure 3 Structural schematic diagram at the U-shaped plate of an oxygen supplementing, heating and warm air mechanism for a blueberry planting greenhouse shed proposed by the present utility model;
[0018] Figure 4 Structural schematic diagram at the nozzle of an oxygen supplementing, heating and warm air mechanism for a blueberry planting greenhouse shed proposed by the present utility model;
[0019] Figure 5 Structural schematic diagram at the mounting plate of an oxygen supplementing, heating and warm air mechanism for a blueberry planting greenhouse shed proposed by the present utility model;
[0020] Figure 6 Expanded structural schematic diagram at the reciprocating lead screw of an oxygen supplementing, heating and warm air mechanism for a blueberry planting greenhouse shed proposed by the present utility model;
[0021] Figure 7 Expanded structural schematic diagram at the synchronous pulley of an oxygen supplementing, heating and warm air mechanism for a blueberry planting greenhouse shed proposed by the present utility model;
[0022] Figure 8 Expanded structural schematic diagram at the swing plate of an oxygen supplementing, heating and warm air mechanism for a blueberry planting greenhouse shed proposed by the present utility model;
[0023] Figure 9 For Figure 5 The enlarged structural schematic diagram at position A in
[0024] In the figure: 1. Greenhouse shed body; 101. Mounting frame; 102. U-shaped plate; 2. Motor; 3. First drive shaft; 4. Disc; 5. Slide bar; 6. Swing plate; 7. Mounting plate; 8. Nozzle; 9. Synchronous pulley; 10. Synchronous belt; 11. Second drive shaft; 12. First bevel gear; 13. Second bevel gear; 14. Spool; 15. Lead screw sliding sleeve; 16. Reciprocating lead screw; 17. Circular tube; 18. Sleeve; 19. Limit rod; 20. Fixed plate; 21. Temperature sensor; 22. Oxygen concentration sensor; 23. First fixed seat; 24. Second fixed seat; 25. Fan; 26. Hot air blower; 27. Slide rail; 28. Slide block. Detailed implementation manners
[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0026] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will refer to the accompanying drawings and combine with embodiments to detail the present utility model.
[0027] Referring to Figures 1 - 9 , an oxygen supplementing and heating warm air mechanism for a blueberry planting greenhouse, including a greenhouse body 1, an inner wall of the greenhouse body 1 is fixedly connected with a mounting frame 101, a top inner wall of the mounting frame 101 is fixedly connected with a U-shaped plate 102, a top of the U-shaped plate 102 is fixedly connected with a motor 2, an output end of the motor 2 is fixedly connected with a first driving shaft 3, a disk 4 is fixedly connected to a side of the first driving shaft 3 away from the motor 2, a sliding rod 5 is fixedly connected to a side of the disk 4 away from the first driving shaft 3, the sliding rod 5 is arranged at an edge of the disk 4, a swing plate 6 is sleeved on the sliding rod 5, a straight groove adapted to the sliding rod 5 is formed on the swing plate 6, the swing plate 6 is rotatably connected to the U-shaped plate 102, a groove is formed at a position of the U-shaped plate 102 where the swing plate 6 is located, a mounting plate 7 is fixedly connected to a bottom of the swing plate 6, a spray head 8 is fixedly connected to a bottom of the mounting plate 7. Due to the technical means of the reciprocating swing spray head, the reciprocating swing spray head can make the sprayed air quickly spread to each area in the greenhouse, avoid a certain area being directly heated and having a relatively high temperature, and at the same time can quickly supplement the oxygen in the greenhouse, make the oxygen concentration in each area uniform, effectively solve the problem in the background technology that in the prior art, most of the oxygen supplementing equipment and heating warm air equipment equipped in the greenhouse blow the air in a fixed direction. During the process of oxygen supplementing and heating warm air, the air always blows from top to bottom to the blueberries in a certain area and then disperses everywhere. During the dispersing process, part of the heat will be lost. Therefore, the temperature of the area near the air outlet is higher than that of the area far from the air outlet, resulting in uneven temperature in each area of the greenhouse, which will affect the growth of blueberries. Furthermore, it realizes the technical effect of being able to improve the efficiency and effect of air dispersion, ensure uniform temperature and oxygen concentration in the greenhouse, and provide a suitable environment for the growth of blueberries.
[0028] In this embodiment, two synchronous pulleys 9 are arranged at the top of the U-shaped plate 102, and the same synchronous belt 10 is sleeved on both synchronous pulleys 9. One of the synchronous pulleys 9 is fixedly connected to an outer wall of the first driving shaft 3, and a second driving shaft 11 is fixedly penetrated through the synchronous pulley 9 far from the first driving shaft 3.
[0029] In this embodiment, first bevel gears 12 are fixedly connected to both sides of the second drive shaft 11. Both of the first bevel gears 12 are meshed with a second bevel gear 13. A spool 14 is fixedly connected to the bottom of the second bevel gear 13. The spool 14 passes through the U-shaped plate 102 and is rotatably connected to the U-shaped plate 102. A reciprocating lead screw 16 is fixedly connected to the bottom of the spool 14. A lead screw sliding sleeve 15 is sleeved on the reciprocating lead screw 16. A pin hole is arranged on the inner circumferential surface of the lead screw sliding sleeve 15 along its radial direction. A crescent pin cooperating with the reciprocating lead screw 16 is arranged in the pin hole. A circular tube 17 is fixedly connected to the outer wall of the lead screw sliding sleeve 15. A sleeve 18 is fixedly connected to the outer wall of the top end of the circular tube 17. A limiting rod 19 is slidably connected to the inner wall of the sleeve 18. The limiting rod 19 is fixedly connected to the bottom of the U-shaped plate 102.
[0030] In this embodiment, a fixing plate 20 is fixedly connected to the bottom of the circular tube 17. A temperature sensor 21 and an oxygen concentration sensor 22 are respectively fixedly connected to both sides of the fixing plate 20.
[0031] In this embodiment, two first fixing seats 23 and a second fixing seat 24 are fixedly connected to the top of the U-shaped plate 102. The first fixing seat 23 is sleeved on the second drive shaft 11, and the second drive shaft 11 is rotatably connected to the first fixing seat 23. The second fixing seat 24 is sleeved on the first drive shaft 3, and the first drive shaft 3 is rotatably connected to the second fixing seat 24.
[0032] In this embodiment, slide rails 27 are fixedly connected to the bottoms of both ends of the U-shaped plate 102. Sliders 28 are arranged in the slide rails 27. The sliders 28 are slidably connected to the slide rails 27. The sliders 28 are fixedly connected to the mounting plate 7. The positions where the sliders 28 intersect with the swing plate 6 and the U-shaped plate 102 are the centers of circles.
[0033] In this embodiment, a blower 25 and a hot air blower 26 are installed on the top of the greenhouse body 1. Hoses are fixed at the air outlets of the blower 25 and the hot air blower 26. The hoses on the blower 25 and the hot air blower 26 are communicated with the spray head 8. A PLC control device is installed at the position of the greenhouse body 1 where the door is opened and closed. The PLC control device on the greenhouse body 1 is electrically connected to the blower 25, the hot air blower 26, the motor 2, the temperature sensor 21, and the oxygen concentration sensor 22.
[0034] Working principle: When using this device, the temperature inside the greenhouse body 1 can be monitored by the temperature sensor 21, and the oxygen concentration sensor 22 can monitor the oxygen concentration inside the greenhouse body 1. When the temperature inside the greenhouse body 1 drops or the oxygen concentration drops, the temperature sensor 21 and the oxygen concentration sensor 22 transmit the collected signals to the PLC control device, and the PLC control device processes the received signals. If the oxygen concentration or temperature inside the greenhouse body 1 is low, the PLC control device will start the fan 25 or the hot air blower 26. The fan 25 and the hot air blower 26 will draw in the outside air, and the hot air blower 26 will heat the air. The air is drawn in Then it is injected into the nozzle 8 through the hose and sprayed out through the nozzle 8, sucking in the outside air to increase the oxygen concentration inside the greenhouse body 1, and the internal exhaust gas is discharged through the ventilation system on the greenhouse body 1. The temperature inside the greenhouse body 1 is increased by injecting hot air into the greenhouse body 1, so that the oxygen concentration and temperature inside the greenhouse body 1 are suitable for the growth of blueberries. When oxygen injection or hot air injection is performed, the PLC control device will start the motor 2, and the output end of the motor 2 will drive the first drive shaft 3 to rotate, and the first drive shaft 3 will drive the disc 4 to rotate, and the disc 4 will drive the sliding rod 5 to do circular motion, and the sliding rod 5 will move in the groove on the swing plate 6. The sliding rod 5 will drive the swing plate 6 to swing, the swing plate 6 will drive the mounting plate 7 to swing, and the mounting plate 7 will drive the nozzle 8 to swing back and forth to change the direction of the air blowing, speed up the speed of the air flow, quickly increase the oxygen concentration and temperature, and make the oxygen concentration and temperature at each position inside the greenhouse body 1 uniform. When the first drive shaft 3 rotates, it will also drive the synchronous wheel 9 to rotate. The power is transmitted through the synchronous belt 10. The two synchronous wheels 9 will rotate, and the synchronous wheel 9 will drive the second drive shaft 11 to rotate. The second drive shaft 11 will drive the first bevel gear 12 to rotate, and the first bevel gear 12 will drive the second bevel gear 13 to rotate, and the second bevel gear 13 will The I-shaped wheel 14 is driven to rotate, and the I-shaped wheel 14 will drive the reciprocating screw 16 to rotate. The reciprocating screw 16 will drive the screw sleeve 15 to move back and forth. The screw sleeve 15 will drive the round tube 17 to move. The round tube 17 will drive the sleeve 18 to move along the limit rod 19. The round tube 17 can only move up and down. The movement of the round tube 17 will drive the fixed plate 20 to move up and down. The fixed plate 20 will drive the temperature sensor 21 and the oxygen concentration sensor 22 to move, and the oxygen concentration and temperature at different heights inside the greenhouse body 1 will be detected, and oxygen and heat will be supplied to avoid the differences in temperature and oxygen concentration at different heights that affect the growth of blueberries.
[0035] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.
[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components and / or combinations thereof.
[0037] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. An oxygen supplement and heating warm air mechanism for a blueberry planting greenhouse, comprising a greenhouse body (1), characterized in that, The inner wall of the greenhouse body (1) is fixedly connected with a mounting frame (101). The top inner wall of the mounting frame (101) is fixedly connected with a U-shaped plate (102). The top of the U-shaped plate (102) is fixedly connected with a motor (2). The output end of the motor (2) is fixedly connected with a first drive shaft (3). On the side of the first drive shaft (3) away from the motor (2), a disc (4) is fixedly connected. On the side of the disc (4) away from the first drive shaft (3), a sliding rod (5) is fixedly connected. The sliding rod (5) is arranged at the edge of the disc (4). A swing plate (6) is sleeved on the sliding rod (5). A straight groove adapted to the sliding rod (5) is formed on the swing plate (6). The swing plate (6) is rotatably connected to the U-shaped plate (102). A groove is formed in the U-shaped plate (102) at the position of the swing plate (6). The bottom of the swing plate (6) is fixedly connected with a mounting plate (7). The bottom of the mounting plate (7) is fixedly connected with a nozzle (8).
2. The oxygen supplement and heat supply warm air mechanism of the blueberry planting greenhouse as claimed in claim 1, wherein Two synchronous pulleys (9) are arranged on the top of the U-shaped plate (102). The same synchronous belt (10) is sleeved on both synchronous pulleys (9). One of the synchronous pulleys (9) is fixedly connected to the outer wall of the first drive shaft (3). The synchronous pulley (9) away from the first drive shaft (3) is fixedly penetrated with a second drive shaft (11).
3. The oxygen supplement and heating warm air mechanism of the blueberry planting greenhouse as claimed in claim 2, characterized in that, On both sides of the second drive shaft (11), a first bevel gear (12) is fixedly connected. Both first bevel gears (12) are meshed with a second bevel gear (13). The bottom of the second bevel gear (13) is fixedly connected with a spool (14). The spool (14) penetrates through the U-shaped plate (102). The spool (14) is rotatably connected to the U-shaped plate (102). The bottom of the spool (14) is fixedly connected with a reciprocating lead screw (16). A lead screw sliding sleeve (15) is sleeved on the reciprocating lead screw (16). A pin hole is arranged along the radial direction of the inner circumferential surface of the lead screw sliding sleeve (15). A crescent pin cooperating with the reciprocating lead screw (16) is arranged in the pin hole. The outer wall of the lead screw sliding sleeve (15) is fixedly connected with a round tube (17). The outer wall of the top end of the round tube (17) is fixedly connected with a sleeve (18). A limiting rod (19) is slidably connected to the inner wall of the sleeve (18). The limiting rod (19) is fixedly connected to the bottom of the U-shaped plate (102).
4. The oxygen supplementing, heat supply and warm air mechanism of the blueberry planting greenhouse as claimed in claim 3, wherein, The bottom of the round tube (17) is fixedly connected with a fixing plate (20). A temperature sensor (21) and an oxygen concentration sensor (22) are respectively fixedly connected to both sides of the fixing plate (20).
5. The oxygen supplement and heating warm air mechanism of the blueberry planting greenhouse as claimed in claim 4, wherein Two first fixing seats (23) and a second fixing seat (24) are fixedly connected to the top of the U-shaped plate (102). The first fixing seat (23) is sleeved on the second drive shaft (11). The second drive shaft (11) is rotatably connected to the first fixing seat (23). The second fixing seat (24) is sleeved on the first drive shaft (3). The first drive shaft (3) is rotatably connected to the second fixing seat (24).
6. The oxygen supplement and heating warm air mechanism of the blueberry planting greenhouse as claimed in claim 1, characterized in that, Both bottom ends of the U-shaped plate (102) are fixedly connected with slide rails (27). A slider (28) is arranged in the slide rail (27). The slider (28) is slidably connected to the slide rail (27). The slider (28) is fixedly connected to the mounting plate (7). The position where the slider (28) intersects with the swing plate (6) and the U-shaped plate (102) is the center of the circle.
7. The oxygen supplement and heating warm air mechanism of the blueberry planting greenhouse described in claim 1, characterized in that, A fan (25) and a hot air blower (26) are installed on the top of the greenhouse body (1). Hoses are fixed at the air outlets of the fan (25) and the hot air blower (26). The hoses on the fan (25) and the hot air blower (26) are communicated with the spray head (8). A PLC control device is installed at the position of the opening and closing door of the greenhouse body (1). The PLC control device on the greenhouse body (1) is electrically connected to the fan (25), the hot air blower (26), the motor (2), the temperature sensor (21) and the oxygen concentration sensor (22).