JP2010178669A - Lining curtain for agricultural greenhouse, and air supply device utilized for the curtain - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lining curtain for agricultural greenhouse which is excellent in heat retaining properties, and enables rapid air supply/discharge, formation of air film with a small amount of supplied air, and retention of the balanced condition of the air film. <P>SOLUTION: The lining curtain for agricultural greenhouse 1 includes: a tube 2 formed by sealing the respective edge sides of two sheets of resin films 8 and 9 superimposed on each other; and an air supply fan supplying air to the tube. A single opening 3 is formed in the vicinity of each of the longitudinal edge sides of the tube, and the air supply fan is non-hermetically attached to each of the openings. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lining curtain that extends inside an agricultural house and forms an air film with a two-layer structure. More specifically, the air film is quickly formed by a simple structure using a small air supply fan. The present invention relates to a lining curtain for an agricultural house that can maintain its equilibrium state and can perform exhaust quickly and has excellent heat retention.

  Today, house cultivation in which a covering material such as polyvinyl chloride is coated on the outside is widely performed for the purpose of forcing cultivation or cold protection. In such an agricultural house, in order to keep the temperature in the house high even in the low temperature period, a heater is operated to supply hot air into the house. However, in order to prevent a temperature drop in the house at night, it is necessary to operate a heater using a large amount of fuel, and there is a problem that a large heating cost is required.

  On the other hand, by extending the lining material with heat retaining properties in the house in a double or triple manner, a means for blocking the cultivation room and the upper part in the house and preventing the temperature in the cultivation room from being lowered is taken. Yes. However, the double layer cannot obtain a sufficient heat retention effect, and the triple layer has increased heat retention, but has not been widely used because of the large cost and labor for installation. In addition, the lining material is stretched for heat retention at night, but it is necessary to wind it up for lighting during the daytime. If the lining material is installed in double or triple, there is a problem that the work of stretching and winding becomes complicated. there were. Thus, achieving the maximum energy saving effect with an inexpensive and simple device has been a major issue for house farmers.

  In order to solve the above-mentioned problem, a lining curtain has been proposed in which two films are stacked to form a tube, which is provided with an air blowing port and a number of air vent holes to provide an air film formation and an exhaust hoisting function. (Patent Document 1). However, since this lining curtain has a structure in which air is continuously discharged from the air vent hole, in order to form an air film by expanding the tube, it is necessary to always supply air exceeding the displacement from the air supply fan. There was a problem that the operation cost was high. Furthermore, after the expansion, the air constantly flows inside the tube body, and the air in the tube cooled from the upper part of the lining curtain moves to the cultivation room through the air vent hole, so the heat retaining property was not sufficient. .

  On the other hand, as a means for supplying air into such a double seat, a structure in which an air supply fan is airtightly attached to the double seat in an air house is disclosed (Patent Document 2). However, when this structure is diverted to a lining curtain, there is a problem that it takes time to complete the exhaust because the fan propeller becomes an obstacle to the exhaust of air from the inside during the exhaust.

JP 2005-333932 A JP 2004-33065 A

  The present invention solves the problems as described above, has excellent heat retention, and has a small loss of air supply, inflates the tube body in a short time to form an air film, and the tube body reaches a predetermined expanded state. Then, it aims at providing the lining curtain for agricultural houses which can maintain the expansion | swelling state independently.

  The present inventor conducted intensive research to solve the above-mentioned problems. As a result, the air supply fan is non-airtightly attached to the opening of the sealed tube body. Since the target opening becomes negative pressure and becomes substantially airtight, the air loss is small and the tube body is expanded in a short time to form an air film, and after reaching a certain expansion state, a small amount of continuous supply It has been found that the expanded state can be maintained by the air, and that the air supply fan is stopped and the air is exhausted naturally and quickly from the opening of the tube body, and the present invention has been completed.

  The present invention is based on such knowledge, and includes a tube body formed by sealing each end of two superimposed resin films, and two independent sealing sheets. An air supply fan that sends air for inflating the tube body in the vicinity of each end in the length direction has one opening portion that is non-airtightly attached, and each sealing sheet is in the width direction of the tube body. An agricultural house lining curtain characterized by partitioning a cultivation room and a ceiling space in cooperation with a tube body by being provided along the lower sides of both ends.

  The present invention also provides an air supply fan, a frame that supports the air supply fan via a support member, a mounting member that attaches the frame to the opening of the tube body, and the two films of the tube body opening. A space holding member for securing a space for circulating air, the area of the frame body is larger than the area of the air supply fan, the mounting member is a double ring, and the opening end of the tube body is 2 An air supply device for a lining curtain for an agricultural house, which is freely detachably sandwiched between heavy rings.

  The lining curtain for agricultural house according to the present invention is substantially airtight in the initial stage of air supply, even though the air supply fan is non-airtightly attached to the opening. It is possible to expand the body and form an air film. In addition, after the tube body reaches a predetermined expanded state, air flows in and out mainly in the vicinity of the opening, and air convection hardly occurs in the tube body, so that an excellent heat insulating effect is exhibited. Further, since the tube body has a large opening with respect to the air supply fan, the exhaust from the tube body can be performed in a short time by stopping the air supply fan.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an agricultural house lining curtain of the present invention and an air supply device used therefor will be specifically described based on the drawings. Note that the present invention is not limited to these embodiments.

  FIG. 1 is a schematic view showing one embodiment of an agricultural house lining curtain according to the present invention, and FIG. 2 is an enlarged view of the vicinity of the opening. 1 and 2, 1 is the entire lining curtain, 2 is a tube body, 3 is an opening, 4 is an air supply fan, 5 is a space holding frame, 6 is a frame body, 7 is a support member, 8 is an upper film, 9 Is a lower film, 10 is a joint sheet, 11 is a winding pipe, 12 is a discharge port, 13 is a suction port, 14 is a frame member, and 15 is a sealing sheet.

  The tube body 2 is sealed at each end. The material of the tube body 2 is not particularly limited as long as it is used for an ordinary agricultural house lining curtain, but is preferably a polyvinyl chloride resin film or polypropylene. It is an olefin resin film such as polyethylene. A tube body formed by stacking two such resin films and bonding the four ends is suitably used. In bonding the edges of the resin film, a method of welding by heat sealing or a method of bonding using an adhesive can be used. Moreover, about the edge of the width direction of the tube body 2, the joint sheet | seat 10 is not provided, but the edge of the two resin films piled up on the winding pipe 11 is fitted with a packer, and is wound at least once. It is also possible to seal substantially. The packer is an annular fastening body that can be fitted to the winding pipe and is partially opened. The thickness of the resin film is not particularly limited as long as it is generally about 0.05 to 0.2 mm.

  An opening 3 is provided in the lower film 9 in the vicinity of the end in the length direction of the tube body 2. The position of the opening 3 is preferably the central portion in the width direction in the vicinity of both ends of the tube body 2, and at this position, the winding of the tube body 2 is not hindered. An air supply fan 4 is mounted in the opening 3 in a non-airtight manner. In the present invention, non-hermetic means that a space through which air can flow is provided inside and outside the tube body 2 in addition to the discharge port 12 and the suction port 13 of the supply fan, and the supply fan 4 is attached to the opening 3. Means that For example, by making the area of the opening 3 larger than the area of the air supply fan 4, a space through which air can flow is provided between the air supply fan 4 and the opening 3 on the plane of the opening 3. it can. Further, the surface of the discharge port 12 of the air supply fan 4 is mounted so as to be spaced apart from the surface of the opening 3 toward the outside of the tube body 2. A space through which air can flow can be provided between the two surfaces. One opening 3 and one air supply fan 4 may be provided on at least one of the sides of the tube body 2, but if one is provided on each side of the tube body 2, air supply to the tube body 2 is performed. And the time required for exhaustion can be shortened, and further, by stopping one of the air supply fans 4 and operating the other air supply fan 4, the inside of the tube body 2 that has reached the dew point is cultivated. There is an advantage that the inside of the tube body can be dried by circulating the dry air.

  As described above, when the air supply fan 4 is non-airtightly attached to the opening 3 of the tube body 2, when the air supply fan is stopped and exhausted from the tube body 2, the opening 3 and the air supply fan are connected. The air can be naturally discharged from the space provided between the two and the amount of air leaking from this space in the initial stage of air supply is smaller than the air supply amount. The reason for this can be considered as follows. That is, when air is supplied into the tube body 2 by the operation of the air supply fan 4, a negative pressure is generated in the vicinity of the opening due to the air flow. For this reason, when the pressure inside the tube body at the initial stage of supply is low, air flows from the outside to the inside of the tube body 2 even in the space provided between the opening 3 and the air supply fan 4. In other words, an air shutter is formed in the opening 3 so as to be substantially airtight. Therefore, there is little loss of supplied air, and the tube body can be efficiently filled with air and rapidly expanded to form an air film. On the other hand, the tube body 2 is filled with a certain amount of air, and as the internal pressure rises, the air is discharged from the space between the opening 3 and the air supply fan 4. By balancing the exhaust amount and the supply amount, the equilibrium state of the formed air film is independently maintained. Thus, in the equilibrium state, air flows in and out mainly only in the vicinity of the opening, and since the movement of the air is small inside the tube body 2, the heat insulating effect is excellent and the heat retaining property is high. When the air supply fan 4 is stopped, the air inside the tube body 2 is quickly discharged through the space between the opening 3 and the air supply fan 4. On the other hand, if the air supply fan is installed in an airtight manner and the air circulation part is only the discharge port and the suction port of the air supply fan, the air supply fan functions like a check valve and exhausts air. It will be hindered and will take time to exhaust.

  As the air supply fan 4, various air supply fans such as an axial flow fan (propeller type, screw type), a mixed flow fan, and a centrifugal fan (sirocco type, air wheel type, turbo type) can be used. For these air supply fans, the maximum air volume, the maximum static pressure, the discharge port diameter, and the like are appropriately set according to the capacity of the tube body 2, the area of the opening 3, and the like.

Of the air supply fans, a propeller type axial fan is preferable. When a propeller type axial flow fan is used, the wind spreads in a fan shape along the axial direction of the fan, and when it hits the upper film or dispersion plate, it is dispersed in the direction perpendicular to the axial direction. Highly effective in preventing leakage. In general, since a propeller type axial fan has a large air supply amount and a low static pressure, a propeller type axial fan having an appropriate characteristic value according to the capacity of the tube body 2 and the area of the opening 3 is selected. As a result, the tube body can be expanded to form an air film in a short time, and when the internal pressure rises when a predetermined expansion state is reached, the air supply amount is reduced, and the tube body can be prevented from expanding excessively. When the air supply amount is reduced in this way, the air inflow / outflow amount at the opening is reduced, so that the convection of air is further suppressed and the heat insulation effect is improved. Further, since the propeller-type axial flow fan is less expensive than other supply air fans, it is advantageous in terms of cost. More specifically, for example, a tube body having a capacity of about 50 m ³ having a width of 5 m, a length of 50 m, and a thickness of 0.2 m formed from two polyvinyl chloride films is used, one at each end. When a circular opening having a diameter of 200 mm is provided, a propeller-type axial flow fan having a discharge port diameter of about 100 mm, a maximum air volume of 3.0 m ³ / min, and a maximum static pressure of about 64 Pa can be suitably used.

  The supply fan 4 is attached to the opening 3 by an appropriate attachment means. For example, the frame 6 may be mounted along the opening 3 and the air supply fan 4 may be fixed to the frame 6 via the support member 7. The frame body 6 is composed of a double ring, and can be structured such that the opening of the tube body is detachably sandwiched between the double rings. For example, it has a configuration comprising a lower frame provided with a ridge and an upper frame provided with a ridge, thereby sandwiching the lower film 9 along the opening 3 and fitting the recess and the ridge. It can be attached by combining. Moreover, it is good also as a structure which attached | subjected the taper which can fit these to an upper frame and a lower frame. On the other hand, a frame having a substantially annular shape having a concave portion formed along the outer peripheral surface and having a slide mechanism capable of adjusting the diameter thereof is used to form a concave portion on the film surface of the opening 3. It is also possible to attach to the opening 3 by sliding it to a size where it contacts. Further, the height of the frame body 6 is appropriately set according to the capacity of the tube body 2, the air supply amount of the air supply fan 4, etc., and may be cylindrical.

  The area of the opening 3 of the tube body 2 with respect to the area of the air supply fan 4 depends on the capacity of the tube body 2, the film load, the air supply amount of the air supply fan 4, the attachment position of the air supply fan to the opening 3, etc. Although it sets suitably, it is preferable that it is 2 to 5 times the area of the normal supply fan 4, and 3 to 4 times is more preferable. Within this range, as described above, air can be prevented from leaking from the space between the air supply fan 4 and the opening 3 during air supply, and air can be quickly discharged from the tube body 2 during exhaust. it can. The area of the air supply fan 4 is an area projected onto the surface of the opening 3 and includes not only the area of the discharge port 12 but also the area projected of the frame member 14 and the support member 7.

Further, the mounting position of the air supply fan 4 is also appropriately set according to the capacity of the tube body 2, the film load, the air supply amount of the air supply fan 4, the area of the opening 3, the height of the frame body 6, and the like. The air supply fan 4 can be mounted at any position where the discharge port surface 12 is between the upper surface and the lower surface of the frame body 6, but can also be mounted at a position separated from the lower surface of the frame body 6. For example, the tube body is formed of two polyvinyl chloride films and has a width of 5 m, a length of 50 m, a thickness of 0.2 m and a capacity of about 50 m ^3. A propeller type axial flow fan having a maximum air volume of 3.0 m ³ / min and a maximum static pressure of about 64 Pa is used, and the area of the opening 3 is 3 to 4 times the area of the air supply fan. When the length is 4 cm, the surface of the discharge port 12 is mounted so that these surfaces are generally parallel to the surface of the opening 3 of the tube body 2 from the inside 1 cm of the tube body 2 to the outside 20 cm. Preferably, it is a position from the inside 1 cm to the outside 15 cm of the tube body 2, more preferably from the inside 1 cm to the outside 5 cm. Within this range, leakage of air from the space between the supply fan 4 and the opening 3 during supply is further suppressed.

  The agricultural house lining curtain 1 of the present invention preferably further includes a space holding frame 5 in the opening 3 of the tube body 2. The space holding frame 5 secures a space for air to flow between the two films forming the tube body 2 in the opening 3 so that air can be supplied and exhausted more quickly. The space holding frame 5 may be provided inside the tube body 2 or may be provided on the frame body 6 or the support member 7. The height of the space holding frame 5 is also appropriately set according to the capacity of the tube body 2, the film load, the air supply amount of the air supply fan 4, and the like.

  The agricultural house lining curtain 1 of the present invention has a tube body from the air supply fan 4 when the air supply amount of the air supply fan 4 is sufficient with respect to the distance between the upper and lower films in the opening 3 of the tube body 2. The wind that has flowed into the inside of the air-fueled gas 2 strikes the upper film 8 and is dispersed to form an air flow from the opening 3 toward the inside of the tube body 2, so that leakage of air from the opening 3 during supply is prevented. . On the other hand, when the film interval is large with respect to the air supply amount, it is preferable to provide a dispersion plate in the opening 3 of the tube body 2, thereby dispersing the air flowing into the tube body 2 from the air supply fan 4. Similarly, leakage of air from the opening 3 is suppressed. The dispersion plate may be provided inside the tube body 2, or may be provided on the frame body 6 or the support member 7, and may be configured to be supported by the support body substantially parallel to the opening 3.

  Moreover, it is preferable that the tube body 2 is what attached the winding pipe 11 to the both ends of the width direction. The winding pipe 11 can be attached via the joint sheet 10 joined to the end side of any film forming the tube body 2. By adopting a known winding mechanism and rotating the winding pipe 11, the tube body 2 can be expanded and wound.

  When the lining curtain 1 is expanded, the tube body 2 and the two independent sealing sheets 15 cooperate to partition the cultivation room and the ceiling space. One end side of the sealing sheet 15 is fixed to the wall surface (side vinyl) of the agricultural house or, when a plurality of agricultural houses are connected, joined to the sealing sheet of the adjacent agricultural house. The The other end side is fixed to an inner frame pipe or the like on which the lining curtain 1 is placed so as to be along the lower side of the end side in the width direction of the tube body 2. When the tube body 2 expands, it substantially contacts the sealing sheet 15 at the end in the width direction, and a seal structure is formed at this portion.

  The agricultural house lining curtain of the present invention sets the air supply amount, static pressure, etc. of the air supply fan 4 in consideration of the capacity of the tube body 2, the film load, the area of the opening 3, and the like. Even if the air supply fan 4 is continuously operated after the expansion, it is possible to balance the air supply amount and the exhaust amount in the opening 3 and maintain the equilibrium state of the tube body 2. However, the air supply fan 4 is a variable resistor. It is preferable to provide a control means for adjusting the air supply amount. As a result, the air supply amount is increased at the time of air supply, the tube body 2 is rapidly expanded, and after reaching a predetermined expansion state, the air supply amount is reduced to a level that balances the exhaust amount, thereby reducing the operating cost. It is possible to maintain the equilibrium state of the expanded tube body while suppressing the above. For example, the air supply fan 4 is fully opened when supplying air, and after the tube body 2 expands, the internal pressure rises and at the same time the motor resistance is detected and the rotational speed is automatically suppressed to the set value. It is preferable to provide a control means for automatically stopping when a resistance that is excessively burdened is detected, such as when winding is performed.

As the thickness of the air film formed by expanding the tube body 2 increases, the heat insulating effect is improved. The thickness of the tube body 2 at the time of expansion can be controlled by adjusting the amount of air supplied from the air supply fan 4 in consideration of the capacity of the tube body 2, the film load, the area of the opening 3, and the like. For example, the tube body is formed of two polyvinyl chloride films and has a width of 5 m, a length of 50 m, a thickness of 0.2 m and a capacity of about 50 m ^3. When a propeller type axial flow fan with a maximum air volume of 3.0 m ³ / min and a maximum static pressure of about 64 Pa is used and the area of the opening 3 is 3 to 4 times the area of the supply fan, the output of the supply fan When the power is operated at about 20%, the maximum thickness is maintained at about 30 cm, and when the output is 50%, the maximum thickness can be about 60 cm. On the other hand, the tube body 2 at the time of expansion has a thick central portion in the width direction and a thin end portion. However, as the thickness increases, the tube body 2 contracts toward the center in the width direction. For this reason, the said sealing sheet 15 needs to have the width | variety which can maintain the state substantially contacted in the width direction edge, even if the tube body 2 shrink | contracts. However, if the width of the sealing sheet is too large, there is a risk of damage due to wind pressure from the ceiling when the outer covering material of the agricultural house is opened. Under the above conditions, if the width of the sealing sheet is about 70 cm, even if the thickness of the tube body 2 is expanded to about 60 cm, an airtight state can be maintained and there is no risk of breakage.

  The agricultural house lining curtain 1 of the present invention is operated as follows. That is, first, the lining curtain 1 is extended in an agricultural house, and air is supplied from the opening of the tube body 2 that is substantially airtight by the operation of both air supply fans 4 to expand the tube body 2 to form an air film. (Step (1)). As described above, a negative pressure is generated in the vicinity of the opening due to the air flow. Therefore, when the pressure in the tube body 2 at the initial supply stage is low, the opening 3 is substantially airtight. Therefore, the loss of the supplied air is reduced and the tube body 2 is efficiently filled with air and expanded, and an air film can be quickly formed.

  When the tube body 2 reaches a predetermined expanded state, the air supply fan is continuously operated to supply an amount of air that balances the exhaust amount from the opening to maintain the expanded state of the tube body (step (2). )). As the internal pressure rises, air is discharged from the space between the opening 3 and the air supply fan 4, and the balanced state is obtained by balancing the exhaust amount and the air supply amount. Is maintained autonomously. Normally, the expanded state of the tube body 2 is maintained in this way at night, and the cultivation room is kept warm by the heat insulation effect.

  In the morning, the air inside the tube body is naturally discharged by stopping both supply fans (step (3)). The air inside the tube body 2 is quickly discharged from the opening 3. After discharge, the tube body 2 is wound up for daylighting to the cultivation room (step (4)). After winding, only the air supply fan 4 is operated to circulate and dry the air inside the tube body 2 (step (5)). The dried air in the cultivation room is circulated inside the tube body 2 to dry the water remaining due to condensation. By drying the inside of the tube body 2 in this way, it is possible to prevent the films from adhering to each other when the tube body 2 is expanded again in the step (1). The operation start and stop times of the air supply fan can be appropriately set according to the sunrise time, the sunshine time, and the like. In addition, it is preferable to stop the air supply fan one hour before calculating backward from the time for extending the lining curtain.

  FIG. 3 is a schematic view showing an embodiment of the blower device for a lining curtain of the present invention. 4 is an air supply fan, 6 is a frame body having a recess 6a on the outer peripheral surface, 7 is a support member, 13 is a suction port, 14 is a frame member, 16 is a dispersion plate, and 17 is a support body. The air supply fan 4 and the frame body 6 are the same as described above, and the frame body is detachably formed at the opening of the tube body of the lining curtain. The air supply fan 4 is fixed to the frame body 6 via a support member 7, and the support member 7 is provided with a dispersion plate 16 supported by a support body 17. The support body 17 and the dispersion body 16 disperse the inflowing air, secure a space for the air to circulate, and quickly supply and exhaust air. The frame body 6 has a substantially annular shape having a concave portion 6a formed along the outer peripheral surface, and is provided with a slide mechanism that allows the diameter to be adjusted. By sliding the film surface to a size such that the concave strip portion 6a comes into contact with the film surface, the film is fixedly attached to the opening 3. Further, it can be detached by sliding it to be smaller than the diameter of the opening 3. In addition, the frame body may be composed of a double ring, and the opening of the tube body may be detachably sandwiched between the double rings. For example, it has a configuration comprising a lower frame provided with a ridge and an upper frame provided with a ridge, thereby sandwiching the lower film 9 along the opening 3 and fitting the recess and the ridge. It can be attached by combining. Moreover, it is good also as a structure which attached | subjected the taper which can fit these to an upper frame and a lower frame. The relationship between the area and position of the frame 6 and the air supply fan 4 is the same as the relationship between the area and position of the opening 3 and the air supply fan 4 described above.

  4 and 5 are schematic views in which the lining curtain of the present invention is installed in an agricultural house. 22 is an inner frame pipe, 23 is a tray part, 24 is a winding machine, 25 is a variable resistor, 26 is a timer, 27 is a side vinyl, S1 is a cultivation room, and S2 is a ceiling part space. The lining curtain 1 is placed on an inner frame pipe 22 provided in the agricultural house 21. At night, the cultivation room S1 and the ceiling space S2 are partitioned by the tube body 2 and the sealing sheet 15 in which the tube body 2 is extended by the hoisting machine 24 and the hoisting pipe 11 reaches the tray part 23. When the air supply fan 4 is operated, air is supplied from the opening 3 and the tube body 2 expands. The expanded tube body 2 and the sealing sheet 15 are substantially in contact with each other, and a seal structure is formed. When the tube body 2 expands to a certain thickness, air is discharged from the opening 3, and when this is balanced with the air supply amount, an equilibrium state is maintained. When the operation of the air supply fan 4 is stopped in the morning, the air inside the tube body 2 is quickly exhausted from the opening 3. After exhausting, the lining curtain 1 is wound up by the winder 24. When water due to condensation remains in the tube body 2 after winding, the warm air in the cultivation room S1 circulates inside the tube body 2 by operating only one of the air supply fans 4, and the inside Can be dried. Thereby, it is possible to prevent the light transmittance from being lowered by the remaining water droplets.

Example 1
Two polyethylene resin films having a width of 560 cm, a length of 50 m, and a thickness of 0.05 mm (upper side) and 0.075 mm (lower side) were overlapped, and four sides were pressure-bonded by heat sealing to form a tube body. A polyvinyl chloride joint sheet having a width of 35 cm, a length of 50 m, and a thickness of 0.13 mm was further crimped and joined to each end in the width direction of the tube body on the lower side of the tube body. A packer was fitted and fixed to a winding pipe having a diameter of 32 mm across the joint sheet at the end opposite to the joint surface of the joint sheet. One circular opening having a diameter of 200 mm was provided near both ends in the length direction of the tube body. A propeller equipped with a variable resistor that has a 120 mm square, 38 mm thick frame member with a discharge port diameter of 100 mm, a maximum air volume of 3.3 m ³ / min, a maximum static pressure of 63.7 Pa, and an adjustable output. A type axial flow fan fixed to a frame body via a support member was used, and this frame body was attached to the tube body opening to produce a lining curtain.

  An inner frame pipe was provided in an agricultural house having a width of about 5 m and a depth of about 50 m, and the lining curtain was placed thereon. A sealing sheet having a width of 70 cm was laid on the lower surface of the inner frame pipe. The lining curtain was extended by a hoisting machine, and the hoisting pipe was received at the tray. When the air supply fan was operated (output 50%), the tube body expanded and an air film was formed in about 20 minutes. The thickness of the air film was about 30 cm at the center in the length direction and about 10 cm at the end. When the air supply fan was continuously operated for 14 hours (output 50%), the thickness of the air film was about 60 cm at the maximum in the length direction and about 20 cm at the end, and the expanded state was maintained during that time. . When the operation of the air supply fan was stopped, the discharge of air from the tube body was completed in about 40 minutes. The lining curtain was wound up by a winding mechanism after exhaust. Only one of the air supply fans was operated for 6 hours to dry the moisture condensed in the film. FIG. 6 shows a diagram of the operation of extending and winding the lining curtain and operating the air supply fan.

Example 2
Heavy oil consumption by the lining curtain (Test Zones 1 and 2) produced in Example 1 and a vinyl chloride film (0.075 mm) double tension (Target Zone) in an agricultural house having a width of about 5 m and a depth of about 50 m. The amount was compared. In any case, the lining material was stretched and wound on the same diagram as in Example 1. In Test Zones 1 and 2, the operation of the air supply fan was performed using the same diagram as in Example 1. In Test Zone 1, the output during continuous operation of the air supply fan was 20%, and in Test Zone 2 the output was 50%. The thickness of the air film averaged about 20 cm in the test group 1 and averaged about 40 cm in the test group 2. The fuel oil consumption (L) per 10 ares per day when the heating device (manufactured by Nepon) was set to 19 ± 1 ° C. was examined. FIG. 7 shows a scatter diagram of heavy oil consumption with respect to the difference between the set temperature in the agricultural house (19 ° C.) and the minimum temperature outside the agricultural house on the 1st. Further, from each index approximation formula, the amount of heavy oil consumption (L) per 10 ares per day when the temperature difference between the temperature set in the house and the lowest temperature outside the house was 15 ° C or 20 ° C was obtained. The results are shown in Table 1.

  In test sections 1 and 2 using the lining curtain of the present invention, it was shown that the amount of heavy oil consumption was significantly suppressed as compared to the target section of vinyl chloride film double tension. In particular, in test section 2 in which the thickness of the air film was increased, a remarkable effect of suppressing heavy oil consumption was shown, and it became clear that an excellent energy saving effect was obtained by using the lining curtain of the present invention.

The schematic diagram which shows the lining curtain for agricultural houses which concerns on this invention. FIG. 2 is a partially cut-out enlarged view of the vicinity of the opening of the agricultural house lining curtain in FIG. 1. The schematic diagram which shows the air supply apparatus which concerns on this invention. The front view which shows the state which installed the lining curtain for agricultural houses which concerns on this invention in the agricultural house. The perspective view which shows the state which installed the lining curtain for agricultural houses which concerns on this invention in the agricultural house. It is a figure which shows the diagram of the air supply fan in Example 1. FIG. It is a scatter diagram of the heavy oil consumption with respect to the temperature difference in Example 2.

DESCRIPTION OF SYMBOLS 1 ...... Lined curtain 2 ...... Tube body 3 ...... Opening part 4 ...... Air supply fan 5 ...... Space holding frame 6 ...... Frame body 6a ...... Concave part 7 ...... Supporting member 8 ...... Upper film 9 ... ... Lower film 10 ... ... Joint sheet 11 ... ... Winding pipe 12 ... ... Discharge port 13 ... ... Suction port 14 ... ... Frame member 15 ... ... Sealing sheet 16 ... ... Dispersion plate 17 ... ... Support 21 ... ... Agricultural house 22 ... ... Inner frame pipe 23 ... ... Trays 24 ... ... Winding machine 25 ... ... Variable resistor 26 ... ... Timer 27 ... ... Side vinyl S1 ... ... Cultivation room S2 ... ... Ceiling space

more than

Claims (11)

  A tube body that is formed by sealing each end of two superimposed resin films and two independent sealing sheets, and the tube body is in the vicinity of each end in the length direction. An air supply fan for sending air for inflating air has one opening part that is non-airtightly mounted, and each sealing sheet is provided along both sides below the width direction of the tube body, An agricultural house lining curtain characterized by partitioning a cultivation room and a ceiling space in cooperation with a tube body.   The lining curtain for agricultural houses according to claim 1, wherein the tube body has a winding pipe at each end in the width direction.   The lining curtain for agricultural houses according to claim 2, wherein the winding pipe is fixed to a joint sheet connected to one end of either of the two films constituting the tube body.   The ends in the width direction of the tube body are sealed by fitting the ends in the width direction of the two overlapped films constituting the tube body on the winding pipe with a packer and winding it at least once. The lining curtain for an agricultural house according to claim 2.   5. The air supply fan according to claim 1, wherein the air supply fan is a propeller-type axial flow fan, and is fixed to a frame body mounted along the opening of the tube body via a support member. Agricultural house lining curtain.   The area of the opening of the tube body is 2 to 5 times the area of the air supply fan, and the discharge port of the air supply fan is attached substantially parallel to the opening surface of the opening. The lining curtain for agricultural houses as described in the section.   The lining curtain for an agricultural house according to any one of claims 1 to 6, further comprising a space holding frame for securing a space for air to flow between the two resin films at the opening of the tube body.   Air is circulated between the two films of the air supply fan, the frame that supports the air supply fan via the support member, the mounting member that attaches the frame to the opening of the tube body, and the tube body opening. And a space holding member for securing a space, the area of the frame body is larger than the area of the air supply fan, the mounting member is a double ring, and the opening end of the tube body is between the double rings. An air supply device for a lining curtain for an agricultural house, which is freely detachably clamped.   The air supply device for a lining curtain according to claim 8, wherein the air supply fan is a propeller type axial flow fan. The operation method of the lining curtain for agricultural houses according to any one of claims 1 to 7, comprising the following steps (1) to (4).
(1) The process of extending the lining curtain in an agricultural house and supplying air from the opening of the tube body that is substantially airtight by the operation of both air supply fans to expand the tube body and form an air film (2) A process of maintaining the expansion state of the tube body by supplying air in an amount that balances the exhaust amount from the opening by continuous operation of both supply fans. (3) By stopping both supply fans. The process of naturally discharging the air inside the tube body (4) The process of winding up the tube body from which the air has been discharged Furthermore, the operating method of the lining curtain for agricultural houses of Claim 10 including the following processes.
(5) A process of circulating and drying the air inside the tube body by operating only one of the air supply fans.

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