JP2013188190A - Agricultural greenhouse heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agricultural greenhouse heating system capable of efficiently heating the interior of an agricultural greenhouse and producible at a low cost with a simple structure.SOLUTION: An agricultural greenhouse heating system includes heating units 12 installed in an agricultural greenhouse 100, and a plurality of resin film-like ducts 14 juxtaposed with mutual spaces on the ground of the greenhouse interior S. The heating unit 12 includes a heater body 16 installed in a predetermined height position H from the ground GL in a position close to the greenhouse wall surface of the greenhouse interior, and sucking air into a case body from an air inlet 28 in the greenhouse interior-side side face of the case body to heat the air and exhausting the air to the outside from an outlet 30; a frame 18 for the heater body 16; and a flexible duct connection structure 22 including a plurality of flexible ducts 20 connected to the air outlet 30 of the heater body 16 and to the resin film-like ducts 14, and free to change a connection length from the outlet 30 to the resin film-like ducts 14 and the installed positions of the tips of the flexible ducts 20.

Description

  The present invention relates to an agricultural house heating system for adjusting and maintaining the indoor temperature of an agricultural house to a temperature suitable for crops.

  When cultivating vegetables and fruits, house cultivation may be performed from the advantage of being less susceptible to the weather and easier to perform quality control and work compared to outdoor cultivation. Also, in house cultivation in cold regions and cold seasons in winter, it is not possible to maintain cultivation temperature suitable for crops simply by blocking indoor space and outside air, so the air in the house room is forcibly warmed with a heater, It is necessary to prevent adverse effects such as cold damage. Conventionally, a heater that heats air using heavy oil as fuel is known. FIG. 7 shows an example of a conventional heater, for example. In the conventional heater HT, a fan or the like of the heater is driven to suck the air in the house room into the heater from the top side of the case. And air was heated with the heat which arises by burning fuels, such as heavy oil, in a heater, and it blows off toward the house room from the blower outlet of the lower part side. However, the conventional greenhouse cultivation using heavy oil combustion type heaters has become serious problems such as recent greenhouse gas emissions and increased economic burdens on farmers due to the increase in the price of heavy oil. Furthermore, in the method in which air is sucked in from the top side of the case of the heater HT and blown out from the lower side, the air is difficult to convect in the house room, which is a large-capacity wide space, and temperature unevenness occurs in the room, thereby efficiently heating the room. It was difficult.

  On the other hand, a heat pump type heater that can generate heat with a small amount of energy using a heat pump cycle of a heat medium is known. For example, Patent Document 1 discloses a technique of using a heat pump heater for air conditioning in a garden house. In the gardening house heating device of Patent Document 1, the interior of the casing (1) is divided into front and rear portions by a partition plate (2), the rear side is a machine room (4), and the front chamber (3) is further divided into a partition wall (5). And the upper side is a suction chamber (6), the lower side is a blow-out chamber (7), and the machine room (4) has an evaporation heat exchanger for absorbing heat from water supplied from the outside. (14) and the compressor (15) are arranged, while the suction chamber (6) is provided with a suction port (8) and a heat exchanger for condensation (9) for heating the air is provided in the suction port. (8) is arranged, the partition wall (5) is provided with a flow hole (11), and a fan (12) for blowing out into the suction chamber (7) is arranged, The blowout chamber (7) was provided with a plurality of blowout ports (13). The reference numerals are those described in Patent Document 1.

Japanese Utility Model Publication No. 62-60815

  However, the gardening house warming device of Patent Document 1 has a structure in which the front space in the casing is vertically divided by a partition wall to form a suction chamber and a blowout chamber, but the structure of the casing is complicated, and Since the compressor and other various components are integrally assembled in the machine room, there is a problem that the apparatus becomes complicated, large, heavy, and expensive. In addition, since the outlet direction of the outlet is fixed and the outlet position is unevenly distributed in the house room, air convection is not efficiently performed in the house room, which is a large-capacity wide space, and temperature unevenness occurs. It was difficult to heat efficiently and on average.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide an agricultural house heating system that can be manufactured at a low cost with a simple structure and that can efficiently heat a house room. is there.

  In order to solve the above problems, the present invention is a heating unit 12 that is installed in an agricultural house 100 and heats the air in the house room S, and is connected to the heating unit 12 and heated from the heating unit 12. A plurality of resinous film-like ducts 14 for blowing out the air from the numerous blowout holes 24 into the house room S, which are laid long in one direction on the ground of the house room S and are arranged apart from each other. An agricultural house heating system provided with a plurality of resinous film-like ducts 14, and the heating unit 12 is installed at a predetermined height position H from the ground GL at a position close to the house wall surface 101 in the house room, An air inlet 28 is provided on the side surface of the case body 26 on the house room side, and an air outlet 30 is provided on the side surface facing the inlet 28, so that the air in the house room side is provided. Air is sucked into the case body 26 from the inlet 28 and heated while flowing in a substantially lateral direction toward the outlet 30 facing the inlet 28, and the heated air is taken out of the case body 26 from the outlet 30. One end is connected to the heater body 16, the gantry 18 that supports the heater body 16 at a predetermined height position H, and the air outlet 30 of the case body 26 of the heater body 16. The direction of the flow of the heated air coming out of 30 is reversed and guided along the ground toward the house room S side, and the other end is connected to the resin film duct 14 at the house room side. Connection length from the air outlet 30 of the case body to the resinous film-like duct 14 including the duct 20 and installation of the other end 20b of the flexible duct 20 connected to the resinous film-like duct 14 on the house interior side position Composed a flexible duct connecting structure 22 to freely change, from agricultural houses heating system 10, wherein a.

  Further, the flexible duct 20 of the flexible duct connection structure 22 is laid sideways and bent in a U-shape, and is placed over the ground GL so that the lower space 42 of the gantry 18 communicates from the house wall surface 101 side to the house room S side. It may be done.

  The flexible duct connection structure 22 may include a connection holding portion 46 that holds a connection with the resinous film-like duct 14 by landing a U-shaped bent end on the ground GL.

  Moreover, the upper surface (38a) of the gantry 18 that supports the heater body 16 may be set to a height of 500 to 800 mm from the ground. The lower end of the heater body 16 may be set to a height position of 500 to 800 mm from the ground.

  According to the agricultural house heating system of the present invention, a heating unit that is installed in an agricultural house and heats the air in the house room, and a large number of heated air that is respectively connected to the heating unit and sent from the heating unit. A plurality of resinous film-like ducts that are blown into the house room from the blowout holes of the plurality of resinous film-like ducts that are laid in one direction on the ground in the house room and are arranged apart from each other in parallel. The heating unit is installed at a predetermined height position from the ground at a position close to the house wall surface in the house room, and an air inlet is provided on the side of the case body on the house room side. An air outlet is provided on the side facing the inlet, and the air is sucked into the case body from the air inlet on the house room side to face the inlet. A heater body that heats while flowing in a substantially lateral direction toward the mouth, and that takes the heated air out of the case body from the outlet; a gantry that supports the heater body at a predetermined height position; and a heater body One end is connected to the air outlet of the case body, the direction of the heated air flowing out from the outlet on the wall surface side of the house is reversed and guided along the ground toward the inside of the house, and the other on the inside of the house It includes a plurality of flexible ducts whose ends are connected to the resin film duct, and is connected to the resin film duct on the connection length from the air outlet of the case body to the resin film duct and on the house room side Flexible duct connection structure that allows the installation position of the other end of the flexible duct to be freely changeable. Multiple resin fibres installed Since blow warm air from the beam-shaped duct, the thermal convection circulation of house chamber is smoothly, efficiently heating. In particular, the flexible duct connection structure provides a high degree of freedom in the arrangement of the heating unit and the resin film duct, and a plurality of resin film ducts whose positions are affected by conditions such as the scale of the house and the cultivation position of the crop are housed. Regardless of the location on the ground in the room, the orientation and position of the flexible duct can be freely changed and adjusted so that the connection between the heating unit and the resin film duct is not restricted. Can do. At the same time, it is possible to connect the resinous film-shaped duct without causing twisting, bending, or the like that would hinder the flow of air. As a result, even in a large-capacity wide space, it is possible to specifically realize a structure in which heated air is blown from the ground side of the entire house, and the house room can be efficiently heated without causing almost any temperature unevenness. Further, since the plurality of resinous film-like ducts are in contact with the ground, it is possible to efficiently warm the underground where the crops are cultivated. Therefore, it is possible to cultivate crops well. Further, since the main body of the heater is supported at a certain height from the ground, it can be prevented from being soiled or rusted at an early stage, easy to maintain, and easy to install and adjust the position of the flexible duct connection structure.

  In addition, the flexible duct of the flexible duct connection structure is configured such that the flexible duct is bent sideways and bent in a U-shape, and is placed over the ground so that the lower space of the gantry communicates from the house wall surface side to the house room side. A specific connection structure can be realized without obstructing the air flow in the flexible duct, and the heated air can be smoothly guided to the resinous film duct. Further, the flexible duct can be installed efficiently and stably using the space in the lower space of the gantry.

  In addition, the flexible duct connection structure has a connection holding portion that holds the connection with the resinous film-like duct by landing the U-shaped bent end on the ground, so that other members for position holding are provided. Can be used to maintain a stable connection with a resinous film duct laid on the ground with a simple structure, and to prevent the resinous film duct from being twisted or bent. The connection position and orientation of the resin film duct can be easily adjusted.

  In addition, the upper surface of the gantry supporting the main body of the heater is configured to be set to a height of 500 to 800 mm from the ground, so that the flexible duct can be efficiently installed using the space in the lower space of the gantry. In addition, since the heater body is not set so high as to shade the house room, it does not adversely affect crops such as growth failure and quality deterioration due to lack of sunlight.

It is a top view of the agricultural house heating system which concerns on one Embodiment of this invention. It is a partial enlarged view of the heating unit of the agricultural house heating system of FIG. It is a perspective view of the heating unit of the agricultural house heating system of FIG. It is a side view of the heating unit of the agricultural house heating system of FIG. 4 is an AA arrow view of the heating unit. It is a schematic explanatory drawing which shows the flow of the air of the agricultural house heating system of FIG. It is the schematic of the heater of the conventional agricultural house.

  Embodiments of an agricultural house heating system according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 thru | or 6 has shown one Embodiment of the agricultural house heating system of this invention. The agricultural house heating system according to the present invention heats the interior of an agricultural house such as a greenhouse or greenhouse that grows crops such as vegetables, fruits and flowers. As shown in FIGS. 1 to 5, in this embodiment, the agricultural house heating system 10 includes a heating unit 12 and a plurality of resinous film ducts 14 connected to the heating unit 12. The heating unit 12 includes a heater main body 16, a gantry 18, and a flexible duct connection structure 22 including a plurality of flexible ducts 20.

  In this embodiment, as shown in FIGS. 1 and 6, the agricultural house 100 is made of, for example, a well-known vinyl house, is long in one direction and is provided in a rectangular shape in plan view, and the roof is formed in an arch shape. Has been. In the agricultural house 100, for example, a metal frame assembled in a predetermined shape is covered with a translucent sheet such as polyvinyl chloride, and the four side walls 101 to 104 and the roof 105 of the agricultural house are formed. . A large number of crops T are planted and cultivated on the ground of the agricultural house 100 in a plurality of rows. In FIG. 6, the crop T is shown as an example of a fruit tree such as a mandarin orange.

  The heating unit 12 is a heating means that is installed in the agricultural house 100 and heats the air in the house room. For example, a plurality of (for example, six) heating units are installed in the agricultural house 100, and a plurality of (for example, four) resinous film-like ducts 14 are connected to each heating unit 12. The heating unit 12 is disposed close to the wall surface side of one of the side walls 101 of the opposing long side walls of the agricultural house 100, and is arranged side by side at a predetermined interval in the longitudinal direction. Has been. The number of heating units 12 and the number of resinous film-like ducts 14 may be arbitrarily set according to the size of the house, the type of crop, and the like.

  As shown in FIGS. 1 and 6, the resinous film-like duct 14 is connected to the heating unit 12 and blows the heated air sent from the heating unit into the house room S through a number of blowout holes 24. It is a blowout duct. The resinous film-like duct 14 is made of, for example, a flexible and thin film-like soft synthetic resin such as polyethylene or vinyl, and has a long tubular shape on one side so as to cross the agricultural house 100. Formed and open at both ends. For example, the resin film-like duct 14 is in a flat state so that the inner walls overlap when the air is not sent into the duct, and when the air is sent from the heating unit 12 to the inside of the duct, It swells in a substantially cylindrical shape. On the peripheral wall of the resinous film-like duct 14, a large number of blowing holes 24 are formed in a line along the duct longitudinal direction at regular intervals. The resinous film-like duct 14 is laid, for example, so that the longitudinal direction of the duct is directed toward the short side of the house in a state where the resin film-like duct 14 is landed on the ground GL of the house room S. It is installed with 24 facing upward. The resinous film-like duct 14 is disposed in a state where the entire length of the resinous duct 14 is landed on the ground and the peripheral wall of the duct is in contact with the ground. At the same time, the ground and underground can be warmed. The plurality of resin film-like ducts 14 are juxtaposed at predetermined intervals in the longitudinal direction of the house so as to be laid between, for example, the crops T planted in a plurality of rows on the ground. Is done. In addition, in FIG. 1, although the case where the some resin-made film-like ducts 14 are arranged in parallel at equal intervals is shown, according to the arrangement method, position, type, etc. of the crops to be actually cultivated It may be set appropriately. Further, the numerous blowout holes 24 of the resinous film-like duct 14 may be blown sideways, for example, or may be provided in a plurality of rows without being limited to one row. Further, a large number of blowing holes 24 may be provided randomly without being arranged in a line, or may be provided so that there are a plurality of blowing directions.

  The heater main body 16 of the heating unit 12 is a main body portion of the heating means that is installed in the house room S and sucks and heats the air in the house room, that is, hot air forming means. In the present embodiment, as shown in FIGS. 1, 2, and 4, six heater main bodies 16 are arranged at substantially equal intervals at positions close to the house wall surface 101 in the house room. Each heater main body 16 is supported at a predetermined height position H by the gantry 18, and the height position of the air inlet 28 formed so as to suck in air from the house room side is set to a predetermined height. . The heater main body 16 includes an air conditioning indoor unit in which a blower 32 and a heat exchanger 34 are assembled to a case body 26 provided with an air inlet 28 and an outlet 30. Furthermore, the outdoor unit 36 installed outside the house room with other heat exchangers, compressors, and the like is connected to the heater body 16. Heat medium piping and wiring are connected so that the heat exchanger 34 in the case body 26 and the other heat exchanger of the outdoor unit 36 perform a heat pump cycle. In the present embodiment, two adjacent heater main bodies 16 are connected to one outdoor unit 36.

  As shown in FIGS. 2, 3, and 4, the case body 26 is provided in, for example, a flat rectangular box shape (a rectangular parallelepiped shape) having a rectangular shape in plan view. Of the two side surfaces of the case body 26 facing each other, an air inlet 28 is provided on one side wall, and an air outlet 28 is provided on the other side wall. In addition, an air inlet 28 and an outlet 30 are provided on the opposite longitudinal side surfaces of the four side surfaces of the case body. The case body 26 is arranged with the inlet 28 facing the house room S side and the outlet 30 opposite to the inlet 28 facing the house side wall 101 close to the case body 26. The case body 26 is disposed with a certain distance between the air outlet 30 and the house side wall 101, and a space for the flexible duct 20 described later is secured. As shown in FIG. 5, the air inlet 28 of the case body 26 is provided, for example, by opening substantially the entire side surface of the case body 26 into a rectangular shape. A net 29 or a filter for preventing foreign matters is stretched at the inlet 28. As shown in FIG. 3, the air outlet 28 of the case body 26 is provided in a circular shape, for example, penetrating the side surface with an opening area smaller than the side surface contour of the case body 26. Four outlets 28 are provided in one case body 26, and are formed in a line along the horizontal direction, that is, the longitudinal direction of the case body. The blower 32 is made of, for example, a sirocco fan installed in the case body in the vicinity of the inlet 28 side. The heat exchanger 34 includes, for example, a condenser that forms a heat pump cycle in cooperation with the outdoor unit 36 and supplies heat to the outside. The heat exchanger 34 is installed at an intermediate position inside the case body, which is an intermediate position between the opposing inlet 28 and outlet 30. In the operating state, the heater body 16 sucks air from the inside of the house by the blower 32 inside the case body. Inside the case body, the sucked air flows in one direction in a substantially lateral direction from the inlet 28 toward the outlet 30 facing the inlet. The air flowing in the lateral direction inside the case body is surely brought into contact with the heat exchanger 34 to heat the air. The heated air flows out of the case body from the outlet 30 by the wind power of the blower.

  The gantry 18 is a support means that is installed on the ground in the house room S and supports the heater body 16 at a predetermined height position H. As shown in FIGS. 3, 4, and 5, in the present embodiment, the gantry 18 includes, for example, a base portion 38 having a base surface 38 a formed in a rectangular shape in accordance with the size and shape of the case body 26 of the heater body. And four support legs 40 that support the corners of the frame of the pedestal portion 38 are integrally provided. The gantry 18 is formed by forming a substantially rectangular parallelepiped hollow space below the pedestal and opening four side surfaces of the hollow space. That is, the gantry 18 has a hollow lower space 42 whose side surfaces are opened just below the pedestal 38, that is, directly below the supporting heater body 16. The lower space 42 of the pedestal 18 penetrates from the house side wall toward the house room side. Using this lower space 42, the flexible duct 20 is moved from the house side wall side to the house room side as described later. Space to pass through is secured. In the gantry 18, for example, the height (H) from the ground GL to the upper surface (the pedestal surface 38a) of the gantry, that is, the height (H) from the ground GL to the lower end of the heater body 16 is set to a height of about 55 cm. ing. Therefore, the height of the open portion of the lower space 42 of the gantry 18 is about 55 mm or slightly lower, and the air inlet 28 of the case body of the heater body on the gantry 18 is positioned slightly higher than 55 cm. Is set. In addition, the height position H of the upper surface of the gantry 18 may be set to a height of 500 to 800 mm from the ground GL, for example. For example, if the height of the upper surface of the gantry 18 is lower than 500 mm, the height of the lower space 42 of the gantry 18 is lowered, so that the flexible duct 20 cannot be installed in the lower space, or the flexible duct is forcibly bent. This may cause a loss in the air flow. Moreover, since the height position of the air inlet of the heater body is lowered, the convection efficiency of air may be deteriorated. On the other hand, if the height position of the upper surface of the gantry 18 is higher than 800 mm, the heating unit 12 shades the ground and crops in the agricultural house room, and adverse effects such as hindering the growth of crops due to lack of sunlight and deterioration of quality. There is a risk of giving. Note that the gantry 18 may be configured such that, for example, the length of the support leg can be changed and the height position of the heater main body can be adjusted.

  As shown in FIGS. 1, 2, 3, and 4, the flexible duct connection structure 22 is used to guide the warm air from the heater body 16 to the resin film duct 14. This is a connection structure for connecting the air outlet 30 of the case body 26 and the plurality of resinous film ducts 14. The flexible duct connection structure 22 includes, for example, a plurality of flexible ducts 20 having one end connected to the air outlet 30 of the case body 26 and the other end connected to the resinous film duct 14. In this embodiment, in one heating unit 12, the flexible duct connection structure 22 has four flexible ducts 20 in accordance with the four air outlets 30 provided in the case body 26 of the heater body 16. ing. As described above, the case body 26 is installed with the inlet 28 facing toward the house room and the outlet 30 facing toward the house side wall 101, so that the heated air flowing from the air outlet 30 to the outside of the case body on the house side wall 101 side. Then, it reverses in a U-turn shape toward the house room S side opposite to the air flow R inside the case body, and is guided to the resin film duct 14 installed on the house room S side. The flexible duct connection structure 22 has a resin film-like shape at the connection length from the air outlet 30 of the case body 26 to the resinous film-like duct 14 due to the flexible nature of the flexible duct 20 and the house room inner side S. The installation position of the other end 20b of the flexible duct connected to the duct 14 is configured to be freely changeable. That is, the length of the flexible duct 20, the direction and angle on the other end 20b side, the installation position in the x direction and the y direction in FIG. It is connected to the resinous film duct 14. Therefore, it is not necessary to strictly design the position of the heater body 16 and the positions of the plurality of resin film-like ducts 14 by freely changing the direction of the flexible ducts, and each resin film-like shape. Connection can be easily made corresponding to the installation position of the duct 14. As a result, the installation position of the resin film-like duct 14 that forms the outlet of the heated air into the house room is not limited by the position of the heater body 16 or the position where the crop is planted, but the entire house room. A plurality of resinous film-like ducts 14 can be juxtaposed to supply warm air to the entire house, and average efficient heating can be achieved without causing temperature unevenness even in a large capacity space in the house. It can be realized specifically.

  In this embodiment, for example, the flexible duct 20 can freely expand and contract and bend to maintain the expanded and bent state and the bent state, and can also hold the duct internal space having a circular cross section even in the expanded and bent state. It consists of a metal bellows tube (flexible duct). The periphery of the flexible duct 20 is covered with a heat insulating material such as glass wool, for example. As shown in FIGS. 3 and 4, the flexible duct 20 is bent downward, for example, from one end 20 a connected to the air outlet 30 of the case body 26, and further toward the house interior side on the ground side. Bent sideways in a side view and bent into a U-shape. The flexible duct 20 has a duct middle portion 20c extending from the U-shaped bent portion 20u toward the house room S side communicated with the lower space 42 of the gantry 18 from the house side wall toward the house room side so as to reach the ground GL. Arranged in the landing state. The other end 20b of the flexible duct projects, for example, from the open side surface of the lower space 42 of the gantry 18 on the house room S side toward the outside of the lower space 42. The other end 20b of the flexible duct 20 is connected to the resinous film-like duct 14 arranged at an arbitrary position by freely expanding and contracting and bending as described above to freely change its direction and position. The flexible duct 20 is landed on the ground surface GL of the duct intermediate portion 20c extending from the house wall surface 101 side to the house room S side. Further, a U-shaped bent end (20b side) of the flexible duct 20 is landed on the ground GL, and a connection holding portion 46 that holds the connection with the resinous film-like duct 14 installed on the ground is provided. Composed. That is, the flexible duct connection structure 22 has a connection holding portion 46 that holds the connection with the resinous film-like duct 14 by landing the U-shaped bent end of the flexible duct 20 on the ground GL. The other end 20b of the flexible duct is inserted into an opening at one end of the resinous film-like duct 14, and is connected to the resinous film-like duct 14 from the outside through a metal connecting ring 44 in a substantially airtight state. Yes.

  Next, the operation of the agricultural house heating system according to this embodiment will be described. When constructing the house heating system 10, for example, a plurality of resin film-like ducts 14 are juxtaposed between the crops T cultivated side by side in the farm house 100 as shown in FIG. Heating units 12 are juxtaposed at predetermined intervals at positions close to the house side wall 101. In the heating unit 12, the height of the gantry 18 that supports the heater body 16 is set to about 55 cm, and the height is such that there is no possibility that the crops will be shaded. The flexible duct 20 of the flexible duct connection structure 22 is connected to the air outlet 30 of the heater main body 16 and is laid sideways and bent into a U shape, and the other end is disposed toward the house room side through the lower space of the gantry. It is connected to the resinous film-like duct 14 at a predetermined position by changing the length of the flexible duct or the position of the end portion 20b or by changing the blowing direction. At this time, the connection holding portion 46 of the flexible duct connection structure 22 holds the connection with the resinous film duct 14 when the flexible duct lands on the ground GL. Accordingly, since the flexible duct connection structure 22 has a high degree of freedom in the connection structure, the resin duct duct 14 is not limited to the installation position, and a plurality of resins arranged in parallel over the entire ground in the house room. It can be securely connected to the film duct. Moreover, even if the position of the resinous film-like duct changes depending on the planting position or the like, the connection can be easily and freely adjusted according to the position of the resinous film-like duct. The plurality of resinous film-like ducts are not limited to being arranged in parallel, and may be laid obliquely so that the directions in the duct longitudinal direction are different from each other. Even in this case, the direction of the flexible duct can be changed to easily connect to the resinous film duct.

  When the agricultural house heating system is operated, as shown in FIG. 6, in the heater main body 16, air is sucked from the inside of the house and heated while flowing in the case body in a substantially lateral direction. The heated air flows from the air outlet 30 of the heater body to the flexible duct 20, is inverted by the flexible duct 20, is guided to the house room side, and is blown into the resinous film duct 14. Then, the heated air is blown into the house room from the blowout holes 24 of the resinous film duct, and rises in the house room. Since the air inlet of the heater main body 16 is set toward the house room side and is installed at a certain height from the ground, the relatively warm air in the house room side is sucked and further heated so that the heat efficiency The temperature inside the house can be raised early. In this way, air is sucked from the house room side, heated air is formed by the heating unit 12, reversed to the house room side, and heated air is blown from the resinous film-like duct 14 arranged side by side on the ground side. By taking out, it is possible to heat efficiently in a large-capacity house room space while efficiently convection air, and to realize efficient heating without causing temperature unevenness. Further, since the plurality of resin film-like ducts 14 are laid in contact with the ground of the house, the ground and the ground can be efficiently warmed. Therefore, it is possible to cultivate crops well.

  The agricultural house heating system of the present invention described above is not limited to the configuration of the above-described embodiment alone, and any modification is made without departing from the essence of the present invention described in the claims. May be.

  The agricultural house heating system according to the present invention can be applied to, for example, an agricultural house such as a greenhouse or a greenhouse that grows crops such as vegetables, fruits, and flowers.

DESCRIPTION OF SYMBOLS 10 Agricultural house heating system 12 Heating unit 14 Resin-made film-like duct 16 Heater main body 18 Base 20 Flexible duct 22 Flexible duct connection structure 24 Blowout hole 26 Case body 28 Inlet 30 Outlet 42 Lower space 46 Connection holding part

Claims (4)

A heating unit that is installed in an agricultural house and heats the air in the house room, and a plurality of resins that are connected to the heating unit and blown out the heated air sent from the heating unit into the house room from a number of outlet holes A film-shaped duct, a plurality of resin-made film-shaped ducts that are laid long in one direction on the ground in the house room and arranged in parallel with each other, and an agricultural house heating system comprising:
The heating unit
Installed at a predetermined height position from the ground at a position close to the house wall surface in the house room, an air inlet is provided on the side surface of the case body on the house room side, and an air outlet is provided on the side surface facing the entrance, Heating that draws air into the case body from the air inlet inside the house room, heats the air while flowing in a substantially lateral direction toward the outlet facing the inlet, and discharges the heated air from the outlet to the outside of the case body The machine body,
A stand for supporting the main body of the heater at a predetermined height position;
One end is connected to the air outlet of the case body of the heater body, and the direction of the heated air flowing out of the outlet on the wall surface side of the house is reversed and guided along the ground toward the house room side. It includes a plurality of flexible ducts, the other end of which is connected to the resin film duct on the indoor side, and the connection length from the air outlet of the case body to the resin film duct and the resin film on the house indoor side An agricultural house heating system, comprising: a flexible duct connection structure that allows the installation position of the other end of the flexible duct connected to the duct to be freely changed.   The flexible duct of the flexible duct connection structure is arranged so as to be laid sideways and bent in a U-shape and to be placed over the ground so that the lower space of the gantry communicates from the house wall surface side to the house room side. The agricultural house heating system according to 1.   3. The agricultural house heating system according to claim 2, wherein the flexible duct connection structure has a connection holding portion for holding a connection with the resin film duct by landing a U-shaped bent end on the ground. . The agricultural house heating system according to any one of claims 1 to 3, wherein the upper surface of the gantry supporting the heater body is set to a height of 500 to 800 mm from the ground.

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