CN216567352U

CN216567352U - Fan wet curtain positive pressure ventilation greenhouse

Info

Publication number: CN216567352U
Application number: CN202123153470.6U
Authority: CN
Inventors: 吕名礼; 朱登平; 黄挺; 吴莎莎; 周利利; 白永娟; 孔祥瑞
Original assignee: Shanghai Nongtoutou Agricultural Development Co ltd
Current assignee: Shanghai Nongtoutou Agricultural Development Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-05-24
Anticipated expiration: 2031-12-15

Abstract

The utility model is suitable for the technical field of modern agricultural greenhouse facilities, and provides a fan wet curtain positive pressure ventilation greenhouse which comprises a plurality of greenhouse stand columns and greenhouse cross beams, wherein the greenhouse stand columns and the greenhouse cross beams form a main frame of the greenhouse; the greenhouse using the positive pressure system has the advantages that the area of the greenhouse monomer is increased, the surface area proportion of the greenhouse contacting with the outside is reduced, the heat dissipated through the enclosing structure is reduced, and the heating energy consumption is reduced.

Description

Fan wet curtain positive pressure ventilation greenhouse

Technical Field

The utility model belongs to the technical field of modern agricultural greenhouse facilities, and particularly relates to a positive pressure ventilation greenhouse with a wet curtain of a fan.

Background

The greenhouse has multiple functions of heat preservation, sun shading, rain shielding and the like, and has positive effects on increasing both production and income. However, the breadth of China is broad, the temperature of many places is too high in summer, the greenhouse needs to be cooled through the fan wet curtain, the principle of fan wet curtain cooling is that the fan exhausts air outwards, negative pressure is generated in the greenhouse, external air enters the greenhouse through the wet curtain end, heat in the greenhouse is absorbed through evaporation heat absorption, and then the air is discharged through the fan end, so that the interior of the greenhouse is cooled. The fan wet curtain setting mode enables the distance between the fan and the wet curtain to be not more than 60m to the maximum extent, so that the area of a single greenhouse is small, and the land utilization rate is low. The single greenhouse has small area and large surface area ratio, and the heat dissipated outwards through the enclosure structure is large.

Disclosure of Invention

The utility model provides a fan wet curtain positive pressure ventilation greenhouse, aiming at prolonging the air supply distance of a fan wet curtain of the greenhouse, increasing the area of a single greenhouse and reducing the heating energy consumption on the basis of not changing the physical structure of the existing greenhouse.

The utility model discloses a fan wet curtain positive pressure ventilation greenhouse, which comprises a plurality of greenhouse stand columns and greenhouse cross beams, wherein the greenhouse stand columns and the greenhouse cross beams form a main frame of the greenhouse, a partition plate is arranged on the leftmost greenhouse stand column, axial flow fans for controlling the internal pressure of the greenhouse are arranged in the inner space of the partition plate, the axial flow fans are connected with air cylinders, the other ends of the air cylinders are connected with PVC elbows, the other ends of the PVC elbows are connected with a plurality of main PVC pipes, every two main PVC pipes are connected through a PVC connecting pipe, and the other ends of the main PVC pipes on the rightmost side are provided with PVC plugs.

Preferably, every section all be connected with a PVC pipe on the main PVC pipe, all be provided with the ball valve on the PVC pipe, and every section all seted up a plurality of venthole on the PVC pipe, every section the other end of a PVC pipe is provided with equally the PVC end cap.

Preferably, the leftmost the right side of greenhouse stand in be provided with wet curtain in the inner space of baffle, the upper end of wet curtain is provided with wet curtain upper ledge, be provided with wet curtain outlet pipe on the wet curtain upper ledge, wet curtain outlet pipe is connected with wet curtain delivery pipe, the lower extreme of wet curtain is provided with wet curtain lower ledge, wet curtain lower ledge is connected with the wet return pipe.

Preferably, the leftmost left side department of greenhouse stand is provided with wet curtain window, be provided with the rack on the wet curtain window, the other end meshing of rack has the gear, the gear cover is located on the transmission shaft, the transmission shaft sets up on gear motor, gear motor sets up on the stand of windowing.

Preferably, a filter is arranged on the wet curtain water supply pipe, the other end of the wet curtain water supply pipe is connected with a water pump, the water pump is arranged in the water pool, and the other end of the water return pipe is arranged in the water pool.

Preferably, the top of the greenhouse is provided with a skylight, one of the greenhouse columns is provided with a first temperature control meter and a second temperature control meter, the first temperature control meter is arranged on the second temperature control meter, and a greenhouse gutter is arranged on the greenhouse column below the greenhouse beam.

Compared with the prior art, the utility model has the beneficial effects that: according to the fan wet curtain positive pressure ventilation greenhouse, the greenhouse of the positive pressure system is used, the area of a greenhouse monomer is increased, the proportion of the surface area of the greenhouse contacting with the outside is reduced, the heat dissipated through the enclosure structure is reduced, and the heating energy consumption is reduced;

the problem that the temperature difference between the wet curtain and the fan end is large because the wind enters the greenhouse from the wet curtain end and is discharged out of the greenhouse from the fan end and absorbs heat inside the greenhouse through the inside of the greenhouse, and the temperature gradually increases is solved;

because a positive pressure environment is formed inside the greenhouse, wind is diffused outwards from the greenhouse, and pests enter the greenhouse from the outside except the position of the wet curtain in an upwind movement process, so that the harm of the pests to crops inside the greenhouse is reduced.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is an enlarged view taken at A of FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of FIG. 1 at B in the present invention;

FIG. 4 is an enlarged view at C of FIG. 1 according to the present invention;

FIG. 5 is an exploded view of the gear motor and its associated components of the present invention;

FIG. 6 is a schematic side view of the internal structure of the present invention;

FIG. 7 is a schematic view of the structure of a pool and its associated components of the present invention;

in the figure: 1. a skylight; 2. wet curtain; 3. wet curtain upper frame; 4. a wet curtain water supply pipe; 5. a wet curtain water outlet pipe; 6. A wet curtain lower frame; 7. a water return pipe; 8. an axial flow fan; 9. an air duct; 10. a wet curtain window; 11. a rack; 12. A gear; 13. a drive shaft; 14. windowing upright columns; 15. a primary PVC pipe; 16. PVC elbows; 17. PVC connecting pipes; 18. a PVC plug; 19. supporting a PVC pipe; 20. an air outlet; 21. a ball valve; 22. a partition plate; 23. a reduction motor; 24. a filter; 25. a pool; 26. a water pump; 27. a first temperature control meter; 28. a second temperature control meter; 29. greenhouse columns; 30. greenhouse beams; 31. greenhouse gutter.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a fan wet curtain malleation ventilation greenhouse, including a plurality of greenhouse stand 29 and greenhouse crossbeam 30, the main frame in greenhouse is constituteed to a plurality of greenhouse stand 29 and greenhouse crossbeam 30, it all is provided with baffle 22 on leftmost greenhouse stand 29 to be located, the inside space of baffle 22 all is provided with the axial fan 8 of control greenhouse internal pressure size, axial fan 8 all is last to be connected with dryer 9, the other end of dryer 9 all is connected with PVC elbow 16, PVC elbow 16's the other end all is connected with the main PVC pipe 15 of a plurality of, all be connected through PVC connecting pipe 17 between per two main PVC pipes 15, the main PVC pipe 15's the other end on rightmost side all is provided with PVC end cap 18.

The greenhouse upright posts 29 and the greenhouse cross beams 30 are main supporting structures of the whole greenhouse; the partition plate 22 surrounds the wet curtain 2 and the axial flow fan 8 to separate the wet curtain from the internal environment of the greenhouse, and the two ends of the partition plate are provided with access doors;

the axial flow fan 8 is arranged on the ground on the inner side of the side wall with the wet curtain 2 in the greenhouse, the air inlet end faces the wet curtain 2, the air outlet end faces the interior of the greenhouse, and air flowing through the wet curtain 2 is conveyed to each corner of the interior of the greenhouse;

the front end of the air duct 9 is connected with an axial flow fan 8, and the rear end is connected with a main PVC pipe 15, a PVC elbow 16, a PVC connecting pipe 17 and a PVC plug 18, so that the air of the axial flow fan 8 is directionally conveyed;

the PVC elbow 16 and the PVC connecting pipe 17 are connected with the main PVC pipe 15; the PVC plugs 18 are located at the ends of the main PVC pipe 15 to prevent air from exiting the ends;

the branch PVC pipe 19 is connected with the main PVC pipe 15 and supplies air for each bay of the greenhouse.

Further, all be connected with a PVC pipe 19 on every section of main PVC pipe 15, all be provided with ball valve 21 on a PVC pipe 19, and all seted up a plurality of venthole 20 on every section of PVC pipe 19, the other end of every section of PVC pipe 19 is provided with PVC end cap 18 equally.

The ball valve 21 is connected with the branch PVC pipe 19, the air output of the air outlet 20 is controlled by the opening proportion, the front and back wind speed and the wind pressure of the main PVC pipe 15 are different, and the front and back air output is controlled to be basically consistent by the difference of the opening proportion of the ball valve 21;

the air outlets 20 are evenly distributed on the branch PVC pipes 19 and supply air in all directions.

Specifically, a wet curtain 2 is arranged in the inner space of the partition plate 22 on the right side of the leftmost greenhouse stand column 29, a wet curtain upper frame 3 is arranged at the upper end of the wet curtain 2, a wet curtain water outlet pipe 5 is arranged on the wet curtain upper frame 3, the wet curtain water outlet pipe 5 is connected with a wet curtain water supply pipe 4, a wet curtain lower frame 6 is arranged at the lower end of the wet curtain 2, and the wet curtain lower frame 6 is connected with a water return pipe 7.

The wet curtain 2 is in a honeycomb structure and is produced by processing raw paper. The wet curtain 2 is arranged on any side wall of the greenhouse, is connected with the greenhouse upright post 29 and the greenhouse cross beam 30, and comprises a wet curtain upper frame 3 and a wet curtain lower frame 6. When unsaturated air flows through the surface of the porous and wet curtain 2, a large amount of water is evaporated, and sensible heat reflected by temperature in the air is converted into latent heat of evaporation, so that the temperature of the air is reduced. The axial flow fan 8 continuously conveys the cold air cooled by the wet curtain 2 into the room, and discharges the cold air through the skylight 1 after absorbing the heat of the greenhouse, thereby achieving the cooling effect;

the wet curtain upper frame 3 is generally made of aluminum alloy and is of a structure in a shape like a Chinese character 'ji', so that the wet curtain 2 is fixed, and a wet curtain water outlet pipe 5 is arranged in the inner space;

the lower part of the wet curtain water outlet pipe 5 is uniformly provided with fine holes with the same linear distribution size, and water drops onto the wet curtain 2 through the fine holes;

the wet curtain water supply pipe 4 is a water source conveying pipeline of the wet curtain 2, the front end of the wet curtain water supply pipe is connected with the filter 24 and the water pump 26, and the rear end of the wet curtain water supply pipe is connected with the wet curtain water outlet pipe 5;

the wet curtain lower frame 6 is a lower edge covering of the wet curtain 2 and is in a structure like a Chinese character 'ji', redundant water flows through the wet curtain 2 and then is collected into the wet curtain lower frame 6, and a water drainage hole is reserved at intervals and is connected with a water return pipe 7;

the water flowing through the wet curtain 2 is collected by the wet curtain lower frame 6, flows into the water return pipe 7 and is discharged into the water pool 25 for recycling.

Generally, a wet curtain window 10 is arranged at the left side of the leftmost greenhouse column 29, a rack 11 is arranged on the wet curtain window 10, a gear 12 is meshed with the other end of the rack 11, the gear 12 is sleeved on a transmission shaft 13, the transmission shaft 13 is arranged on a gear motor 23, and the gear motor 23 is arranged on a windowing column 14.

The wet curtain window 10 is positioned at the outer side of the wet curtain 2, the upper part of the wet curtain window is provided with a universal joint connecting piece which can freely rotate and can be selectively opened or closed according to the use conditions of the wet curtain 2 and the axial flow fan 8, and when the axial flow fan 8 works, the wet curtain window 10 is required to be in an opened state;

the rack 11 is connected with the lower part of the wet curtain window 10, and the wet curtain window 10 is driven to be opened or closed by the movement of the rack 11;

the gear 12 is matched with the rack 11 for use, and the gear 12 rotates to drive the rack 11 to move linearly, so that the wet curtain window 10 is driven to open or close;

the transmission shaft 13 is made of galvanized steel pipes, the middle of the transmission shaft is connected with a speed reducing motor 23, a plurality of gears 12 are connected in series on the speed reducing motor 23, and the speed reducing motor 23 rotates to drive the transmission shaft 13 to rotate and drive the gears 12 to rotate;

the speed reducing motor 23 is connected with the transmission shaft 13 and provides power for the rack 11, the gear 12 and the transmission shaft 13;

the windowing upright post 14 is of a galvanized steel structure and provides a support for the rack 11, the gear 12, the transmission shaft 13 and the speed reducing motor 23.

The wet curtain water supply pipe 4 is provided with a filter 24, and the other end of the wet curtain water supply pipe 4 is connected to a water pump 26, the water pump 26 is provided in the water tank 25, and the other end of the return pipe 7 is provided in the water tank 25.

The filter 24 filters out impurities in the water; the water tank 25 stores water for the wet curtain 2; the water pump 26 provides the water supply power for the wet curtain 2.

In addition, the top of the greenhouse is provided with a skylight 1, one greenhouse column 29 is provided with a first temperature control meter 27 and a second temperature control meter 28, the first temperature control meter 27 is arranged on the second temperature control meter 28, and a greenhouse gutter 31 is arranged on the greenhouse column 29 below the greenhouse beam 30.

The first temperature control meter 27 and the second temperature control meter 28 can measure the temperature, can set an upper limit temperature value and a lower limit temperature value, and output signals after reaching the set temperature values.

The greenhouse gutter 31 is used to collect rainwater and to introduce the rainwater into the drainage pipes on both sides of the greenhouse.

The working principle and the using process of the utility model are as follows: after the temperature control device is installed, when the temperature in the greenhouse measured by the temperature control meter I27 exceeds an upper limit set value or is manually controlled, signal output control is performed: when the skylight 1 is opened and the speed reducing motor 23 rotates positively to drive the transmission shaft 13 to rotate, the transmission shaft 13 drives the gear 12 to rotate, the gear 12 drives the rack 11 to move linearly, the rack 11 pulls the wet curtain window 10, and the wet curtain window 10 is opened. When the temperature in the greenhouse measured by the second temperature control meter 28 exceeds the upper limit set value or is manually controlled, a signal is output for control: axial fan 8 begins to rotate, and water pump 26 starts to draw water, and water transports through wet curtain delivery pipe 4 earlier, filters through filter 24, carries wet curtain outlet pipe 5 through wet curtain delivery pipe 4 again, evenly scatters on wet curtain 2 through the aperture on the wet curtain outlet pipe 5, and rivers rely on gravity top-down to flow. The water is collected in the wet curtain lower frame 6 and flows into the water return pipe 7 through the holes on the wet curtain lower frame 6 and returns to the water pool 25 to form a cycle.

After the lower air of outdoor relative humidity passes through wet curtain 2, the water evaporation on the wet curtain 2 absorbs heat, make the air temperature who gets into reduce, humidity increases, the space that baffle 22 parcel was got into again, through axial fan 8's operation, loop through dryer 9, PVC elbow 16, main PVC pipe 15, PVC connecting pipe 17, prop up PVC pipe 19, get into the greenhouse inside through venthole 20 again, adjust the size of every division air output through ball valve 21, it is unanimous to guarantee around the air output basically. After air with lower temperature enters the greenhouse, the air absorbs heat in the greenhouse, the air which is continuously cooled by the wet curtain 2 enters the greenhouse, the pressure in the greenhouse is higher than that of the outdoor environment, a positive pressure space is formed, finally the air is discharged out of the greenhouse through the skylight 1, the indoor redundant heat is taken away, and the purpose of cooling the interior of the greenhouse is achieved.

Because the main PVC pipe 15 is a long and narrow channel, the distance that can be transported after the pressurization of the axial flow fan 8 is long, and the temperature environment in the main PVC pipe 15 is basically consistent from front to back, the temperature of the air entering the greenhouse through the air outlet 20 is basically consistent, and the greenhouse temperature balance at the front end and the rear end is ensured. Therefore, the greenhouse monomer greenhouse area using positive pressure ventilation can be larger, and the temperature is more uniform.

The air exhausted from the greenhouse through the skylight 1 forms an outward airflow, outdoor pests and bacteria can enter the greenhouse by overcoming an outward thrust, and large-scale pests are blocked by the insect-proof net, so that the plant diseases and insect pests in the greenhouse are reduced.

When the temperature in the greenhouse measured by the second temperature control meter 28 is lower than the lower limit set value or manually controlled, signal output control is performed: the water pump 26 is stopped and the axial flow fan 8 is stopped.

When the temperature in the greenhouse is measured by the temperature control meter I27 to be lower than a limit set value or manually controlled, a signal is output for control: the gear motor 23 rotates reversely to drive the transmission shaft 13, the gear 12 and the rack 11 to move reversely, the wet curtain window 10 is closed, and the skylight 1 is closed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a wet curtain malleation ventilation greenhouse of fan which characterized in that: including a plurality of greenhouse stand (29) and greenhouse crossbeam (30), a plurality of greenhouse stand (29) with greenhouse crossbeam (30) constitute the main frame in greenhouse, are located leftmost all be provided with baffle (22) on greenhouse stand (29), the inner space of baffle (22) all is provided with axial fan (8) of control greenhouse internal pressure size in, all is connected with dryer (9) on axial fan (8), the other end of dryer (9) all is connected with PVC elbow (16), the other end of PVC elbow (16) all is connected with the main PVC pipe (15) of a plurality of, per two all be connected through PVC connecting pipe (17) between main PVC pipe (15), the rightmost side the other end of main PVC pipe (15) all is provided with PVC end cap (18).

2. The fan wet curtain positive pressure ventilation greenhouse of claim 1, wherein: every section all be connected with a PVC pipe (19) on main PVC pipe (15), all be provided with ball valve (21) on a PVC pipe (19), and every section all seted up a plurality of venthole (20) on a PVC pipe (19), every section the other end of a PVC pipe (19) is provided with equally PVC end cap (18).

3. The fan wet curtain positive pressure ventilation greenhouse of claim 1, wherein: the leftmost the right side of greenhouse stand (29), in be provided with wet curtain (2) in the inner space of baffle (22), the upper end of wet curtain (2) is provided with wet curtain upper ledge (3), be provided with wet curtain outlet pipe (5) on wet curtain upper ledge (3), wet curtain outlet pipe (5) are connected with wet curtain delivery pipe (4), the lower extreme of wet curtain (2) is provided with wet curtain lower frame (6), wet curtain lower frame (6) are connected with wet return pipe (7).

4. The fan wet curtain positive pressure ventilation greenhouse of claim 1, wherein: the left side department of the most left greenhouse stand (29) is provided with wet curtain window (10), be provided with rack (11) on wet curtain window (10), the other end meshing of rack (11) has gear (12), gear (12) cover is located on transmission shaft (13), transmission shaft (13) set up on gear motor (23), gear motor (23) set up on windowing stand (14).

5. The fan wet curtain positive pressure ventilation greenhouse of claim 3, wherein: the wet curtain water supply pipe (4) is provided with a filter (24), the other end of the wet curtain water supply pipe (4) is connected with a water pump (26), the water pump (26) is arranged in a water tank (25), and the other end of the water return pipe (7) is arranged in the water tank (25).

6. The fan wet curtain positive pressure ventilation greenhouse of claim 1, wherein: a skylight (1) is formed in the top of the greenhouse, a first temperature control meter (27) and a second temperature control meter (28) are arranged on one greenhouse stand column (29), the first temperature control meter (27) is arranged on the second temperature control meter (28), and a greenhouse gutter (31) is arranged on the greenhouse stand column (29) below the greenhouse beam (30).