NL1043187B1 - A greenhouse with air conduits for climate control - Google Patents
A greenhouse with air conduits for climate control Download PDFInfo
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- NL1043187B1 NL1043187B1 NL1043187A NL1043187A NL1043187B1 NL 1043187 B1 NL1043187 B1 NL 1043187B1 NL 1043187 A NL1043187 A NL 1043187A NL 1043187 A NL1043187 A NL 1043187A NL 1043187 B1 NL1043187 B1 NL 1043187B1
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- Prior art keywords
- upright
- greenhouse
- air
- screen
- roof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/246—Air-conditioning systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Greenhouses (AREA)
Abstract
Description
© 1043187 © B1 OCTROOI © Aanvraagnummer: 1043187 © Int. CL:© 1043187 © B1 PATENT © Application number: 1043187 © Int. CL:
A01G 9/24 (2019.01) A01G 9/14 (2019.01) © Aanvraag ingediend: 13 maart 2019 © Voorrang:A01G 9/24 (2019.01) A01G 9/14 (2019.01) © Application submitted: 13 March 2019 © Priority:
maart 2018 NL 1042790 © Octrooihouder(s):March 2018 NL 1042790 © Patent holder (s):
Alcomij Beheer BV te 's-Gravenzande.Alcomij Beheer BV in 's-Gravenzande.
Aanvraag ingeschreven:Application registered:
september 2019 (43) Aanvraag gepubliceerd:September 2019 (43) Request published:
september 2019September 2019
47) Octrooi verleend:47) Patent granted:
oktober 2019 © Octrooischrift uitgegeven:October 2019 © Patent issued:
oktober 2019 © Uitvinder(s):October 2019 © Inventor (s):
Gerhard Gozewinus van Leerdam te 's-Gravenzande.Gerhard Gozewinus van Leerdam in 's-Gravenzande.
Sven Peter van Heijningen te 's-Gravenzande. Willem Nowé te 's-Gravenzande.Sven Peter van Heijningen in 's-Gravenzande. Willem Nowé in 's-Gravenzande.
© Gemachtigde:© Authorized representative:
Geen.No.
54) A greenhouse with air conduits for climate control54) A greenhouse with air conduits for climate control
5^ A greenhouse comprising walls, a roof, upright supports for supporting the roof, and air conduits for climate control in the greenhouse. The air conduits can b5 ^ A greenhouse including walls, a roof, upright supports for supporting the roof, and air conduits for climate control in the greenhouse. The air conduits can b
To reduce the problem of the air conduits being in the way when growing produce in the greenhouse growth space and/or during other operations such as cleaning, or re-arrangements, the upright supports are hollow uprights, said hollow uprightsTo reduce the problem of the air conduits being in the way when growing produce in the greenhouse growth space and / or during other operations such as cleaning, or re-arrangements, the upright supports are hollow uprights, said hollow uprights
- comprising an upper opening and a lower opening,- including an upper opening and a lower opening,
- defining an air conduit of the air conduits for climate control between the upper opening and the lower opening, and- defining an air conduit or the air conduits for climate control between the upper opening and the lower opening, and
- comprising a fan capable of moving air through the air conduit defined by the hollow upright.- including a fan capable of moving air through the air conduit defined by the hollow upright.
NL B1 1043187NL B1 1043187
Dit octrooi is verleend ongeacht het bijgevoegde resultaat van het onderzoek naar de stand van de techniek en schriftelijke opinie. Het octrooischrift komt overeen met de oorspronkelijk ingediende stukken.This patent has been granted regardless of the attached result of the research into the state of the art and written opinion. The patent corresponds to the documents originally submitted.
A greenhouse with air conduits for climate controlA greenhouse with air conduits for climate control
The present invention relates to a greenhouse comprisingThe present invention relates to a greenhouse including
- walls,- walls,
- a roof, said roof comprising sloping sections, said sloping sections comprising a downward facing side and an upward facing side,- a roof, said roof including sloping sections, said sloping sections including a downward facing side and an upward facing side,
- gutters for collecting water condensed against the downward facing sides of the sloping sections of the roof,- gutters for collecting water condensed against the downward facing sides of the sloping sections of the roof,
- upright supports for supporting the roof, and- upright supports for supporting the roof, and
- air conduits for climate control in the greenhouse.- air conduits for climate control in the greenhouse.
A greenhouse according to the preamble is well-known in the art. Commercial greenhouses tend to occupy quite a large area. To maintain a desired climate in the growth space of the greenhouse in a homogenous manner, it is known to have plastic air distribution hoses and conduits extending across the greenhouse, be it suspended from the roof or below growth tables or growth gutters.A greenhouse according to the preamble is well-known in the art. Commercial greenhouses tend to occupy quite a large area. To maintain a desired climate in the growth space of the greenhouse in a homogenous manner, it is known to have plastic air distribution hoses and conduits extending across the greenhouse, be it suspended from the roof or below growth tables or growth gutters.
British patent application GBGB922757 discloses an air-conditioned and water-cooled greenhouse comprising a concrete foundation on which a frame of polyester beams is erected with apertures along the beams through which air or water can be discharged, and glass or transparent plastics panels supported on the beams. Channels are also provided in the concrete foundation. In use, fresh air is drawn in by a central ventilator, heated and distributed via a hollow beam to the interconnected channels of the frame and expelled into the greenhouse through apertures in the frame.British patent application GBGB922757 discloses on an air-conditioned and water-cooled greenhouse including a concrete foundation on which a frame of polyester beams is erected with apertures along the beams through which air or water can be discharged, and glass or transparent plastics panels supported on the beams. Channels are also provided in the concrete foundation. In use, fresh air is drawn in by a central fan, heated and distributed through a hollow beam to the interconnected channels or the frame and expelled into the greenhouse through apertures in the frame.
Air conduits form a major component of a ventilated and airconditioned greenhouses and a problem is that it requires substantial amounts of material to have a system installed that is able to provide a uniform climate throughout the greenhouse.Air conduits form a major component of a ventilated and air-conditioned greenhouse and a problem is that it requires substantial amounts of material to have a system installed that is able to provide a uniform climate throughout the greenhouse.
It is an object of the present invention to reduce this problem.It is an object of the present invention to reduce this problem.
To this end, a greenhouse according to the preamble is characterized in that the upright supports are hollow uprights, said hollow uprightsTo this end, a greenhouse according to the preamble is characterized in that the upright supports are hollow uprights, said hollow uprights
- comprising an upper opening and a lower opening,- including an upper opening and a lower opening,
- defining an air conduit of the air conduits for climate control between the upper opening and the lower opening, and- defining an air conduit or the air conduits for climate control between the upper opening and the lower opening, and
- comprising a fan capable of moving air through the air conduit defined by the hollow upright.- including a fan capable of moving air through the air conduit defined by the hollow upright.
Thus the upright supports serve a dual purpose and this makes it possible to use the upright supports for control of the climate in the greenhouse. The number of conventional air conduits for climate control such as plastic air distribution hoses may be reduced and/or their cross-sectional area (diameter) may be reduced or they may be completely abstained from, as a result of which they are less of a hindrance or of no hindrance at all.Thus the upright supports serve a dual purpose and this makes it possible to use the upright supports for control of the climate in the greenhouse. The number of conventional air conduits for climate control such as plastic air distribution hoses may be reduced and / or their cross-sectional area (diameter) may be reduced or they may be completely abstained from, as a result of which they are less of a hindrance or or no hindrance at all.
It is possible to control the fans of the hollow uprights individually, allowing for local control of the climate conditions.It is possible to control the fans of the hollow up individually, allowing for local control of the climate conditions.
Typically the fan will be a fan for moving air from the upper opening to the lower opening. In a situation where moisture condenses against the roof, this allows for air having a reduced load of water to be moved to plants inside the greenhouse. By controlling the speed with which air is passed through the upright supports, the relative humidity in the greenhouse, in particular its growth area, can be controlled.Typically the fan will be a fan for moving air from the upper opening to the lower opening. In a situation where moisture condenses against the roof, this allows for air having a reduced load of water to be moved to plants inside the greenhouse. By controlling the speed with which air is passed through the upright supports, the relative humidity in the greenhouse, in particular its growth area, can be controlled.
The fan is advantageously a fan that can be operated reversibly, allowing for air to flow in an opposite direction.The fan is advantageously a fan that can be operated reversibly, allowing for air to flow in an opposite direction.
According to a very important embodiment, the upper opening will be capable of serving as in inlet opening. Typically the inlet opening will be provided at the upper end of the upright support, although it may be provided in a side wall of the upright support.According to a very important embodiment, the upper opening will be capable of serving as in inlet opening. Typically the inlet opening will be provided at the upper end of the upright support, although it may be provided in a side wall of the upright support.
The lower opening will typically be provided in a side wall of the upright support. It is preferred that there is a multitude of lower openings distributed over the circumference of the upright support to distribute air received from the inlet opening in all directions. However, it is also possible to create a transport of air through the greenhouse by having inlet openings face a particular direction, e.g. all facing one wall of the greenhouse.The lower opening will typically be provided in a side wall of the upright support. It is preferred that there is a multitude of lower opening distributed over the circumference of the upright support to distribute air from the inlet opening in all directions. However, it is also possible to create a transport or air through the greenhouse by having an opening face a particular direction, for example all facing one wall of the greenhouse.
According to a favourable embodiment, the greenhouse comprises a screen provided below the roof, said screen definingAccording to a favorite embodiment, the greenhouse comprises a screen provided below the roof, said screen defining
- a greenhouse growth space below the screen, and- a greenhouse growth space below the screen, and
- a roof space between the roof and the screen;- a roof space between the roof and the screen;
the upper opening of the upright supports being located above the screen and the lower opening of the upright supports being located below the screen.the upper opening of the upright supports being located above the screen and the lower opening of the upright supports being located below the screen.
This allows for improved climate control using the hollow supports, for example because the roof space may be used to control the climate by transport of air in a horizontal direction. The upright supports tap the flow of air as needed locally in the greenhouse. It is also possible to transport and distribute CO2 in this manner with control over the amount provided locally using individual control of the fans of the hollow uprights.This allows for improved climate control using the hollow supports, for example because the roof space may be used to control the climate by transport or air in a horizontal direction. The upright supports tap the flow or air as needed locally in the greenhouse. It is also possible to transport and distribute CO 2 in this manner with control over the amount provided locally using individual control of the fans of the hollow uprights.
A screen is well known in the art and serves to control the climate in greenhouse growth space. The screen may for example be closed during the night if it is desired to reduce the loss of heat from the greenhouse, or to protect plants in the greenhouse from excess heat.A screen is well known in the art and serves to control the climate in greenhouse growth space. The screen may for example be closed during the night if it is desired to reduce the loss of heat from the greenhouse, or to protect plants in the greenhouse from excessive heat.
According to a favourable embodiment, the hollow uprights further comprise :According to a favorite embodiment, the hollow uprights further include:
- an intermediate opening located in between the upper opening and the lower opening- an intermediate opening located in between the upper opening and the lower opening
- at least one valve capable of regulating the flow of air from the lower opening and the upper opening relative to each other.- at least one valve capable of regulating the flow of air from the lower opening and the upper opening relative to each other.
In this way the hollow upright is capable of conditioning air using less energy. Drawing air into the hollow uprights from beneath the roof and from below the plants and converging and discharging the two flows of air through the intermediate opening allows control of temperature, humidity or both by proportionally mixing the two flows of air using the at least one valve. The fan is preferably located in or at the intermediate opening so the flows get mixed well. A single two-way valve located in the hollow uprights at the height of the intermediate opening allows single step regulation of the proportional mixing of the two flows of air. Air could also be drawn in at the intermediate opening and be discharged via the lower opening, the upper opening or both said openings.In this way the hollow upright is capable of conditioning air using less energy. Drawing air into the hollow uprights from beneath the roof and from below the plants and converging and discharging the two flows of air through the intermediate opening allows control of temperature, humidity or both by proportionally mixing the two flows of air using the at least one valve . The fan is preferably located in or at the intermediate opening so the flows get mixed well. A single two-way valve located in the hollow uprights at the height of the intermediate opening allows single step regulation of the proportional mixing of the two flows of air. Air could also be drawn in at the intermediate opening and discharged through the lower opening, the upper opening or both said opening.
According to a favourable embodiment, the upright supports are connected by trusses and the upright supports support the trusses, wherein the upright supports extend above the trusses with the upper opening located above the trusses and horizontally spaced apart from the gutters .According to a favorite embodiment, the upright supports are connected by the trusses and the upright supports are supported by the trusses, the upright supports are extended above the trusses with the upper opening located above the trusses and horizontally spaced apart from the gutters.
This allows for an improved intake of air from the roof space or discharge to the roof space. Also, the strength of the upright support is not compromised by the upper opening. In addition, it is a convenient configuration if it is desired to exchange air above the screen.This allows for an improved intake or air from the roof space or discharge to the roof space. Also, the strength of the upright support is not compromised by the upper opening. In addition, it is a convenient configuration if it is desired to exchange air above the screen.
According to a favourable embodiment, the upright support comprises means for changing the temperature of air passed through the upright support.According to a favorite embodiment, the upright support comprises means for changing the temperature or air passed through the upright support.
Changing the temperature may involve cooling or heating.Changing the temperature may involve cooling or heating.
The means for changing the temperature may be a heat exchanging surface of a conduit for hot water (for heating) or cold water (for cooling) . Heating may also be conveniently done by electrical heating.The means for changing the temperature may be a heat exchanging surface or a conduit for hot water (for heating) or cold water (for cooling). Heating may also be conveniently done by electrical heating.
The means for changing the temperature may also comprise a nozzle for spraying water (preferably rain water or condensed water collected using the gutters as this contains little salts) into the air passed through the upright support, cooling the air. Excess water will not end up on the plants in the greenhouse. Typically the water will be sprayed in the longitudinal direction of the upright support.The means for changing the temperature may also include a nozzle for spraying water (preferably rain water or condensed water collected using the gutters as this contains little salts) into the air passed through the upright support, cooling the air. Excess water will not end up at the plants in the greenhouse. Typically the water will be sprayed in the longitudinal direction of the upright support.
According to a favourable embodiment, the upright support comprises means for changing the relative humidity of air passing through the upright support.According to a favorite embodiment, the upright support comprises means for changing the relative humidity or air passing through the upright support.
The means for changing the relative humidity may also comprise a nozzle for spraying water into the air passed through the upright support. Excess water will not end up on the plants in the greenhouse. Typically the water will be sprayed in the longitudinal direction of the upright support.The means for changing the relative humidity may also include a nozzle for spraying water into the air passed through the upright support. Excess water will not end up at the plants in the greenhouse. Typically the water will be sprayed in the longitudinal direction of the upright support.
The means may also comprise a heat exchanging surface of a conduit for cold medium, allowing moisture from the air to condense on said surface.The means may also include a heat exchanging surface or a conduit for cold medium, allowing moisture from the air to condense on said surface.
According to a favourable embodiment, the screen is a relatively high screen and the greenhouse further comprises a relatively low screen, and hollow uprights comprise a further opening between the relatively high screen and the relatively low screen.According to a favorite embodiment, the screen is a relatively high screen and the greenhouse further comprises a relatively low screen, and hollow uprights include a further opening between the relatively high screen and the relatively low screen.
This allows for improved climate control using the hollow supports, for example, the space between the relatively high screen and the relatively low screen may be used to control the climate by transport of air in a horizontal direction. The upright supports tap the flow of air as needed locally in the greenhouse. It may also be possible to transport air enriched in CO2between the two screens. In such a case may be preferred to have a secondary conduit to bypass the two screens, connecting the growth area of the greenhouse with the roof space, and to use two fans so as to control the flow of air through the hollow support from the roof space independent of the flow of air enriched in CO2.This allows for improved climate control using the hollow supports, for example, the space between the relatively high screen and the relatively low screen may be used to control the climate by transport or air in a horizontal direction. The upright supports tap the flow or air as needed locally in the greenhouse. It may also be possible to transport air in CO 2 between the two screens. In such a case may be preferred to have a secondary conduit to bypass the two screens, connecting the growth area of the greenhouse with the roof space, and to use two fans so as to control the flow of air through the hollow support from the roof space independent of the flow of air enriched in CO 2 .
To control the flow of air through the upright support, it may comprise a valve for selecting the upper opening or the further opening. In addition or alternatively, the fan of the upright support is located between the further opening and the upper opening and may be used for controlling the flow through the upper opening whereas the upright support may comprise a further fan for controlling air through the further opening. Both fans can be operated simultaneous if it is desired to have a large flow of air to (or from) the lower opening of the hollow uprights.To control the flow of air through the upright support, it may include a valve for selecting the upper opening or the further opening. In addition or alternatively, the fan of the upright support is located between the further opening and the upper opening and may be used for controlling the flow through the upper opening whereas the upright support may be a further fan for controlling air through the further opening. Both fans can be operated simultaneously if it is desired to have a large flow or air to (or from) the lower opening or the hollow uprights.
According to a favourable embodiment, the greenhouse comprises a conduit for a gas comprising a CO,concentration of at least 5% by volume, and the upright supports are in communication with the conduit for said gas.According to a favorite embodiment, the greenhouse comprises a conduit for a gas including a CO, concentration of at least 5% by volume, and the upright supports are in communication with the conduit for said gas.
This allows the upright supports to extract the gas from the conduit depending on the flow rate as controlled by the fan, allowing the distribution of CO2to be done evenly.This allows the upright supports to extract the gas from the conduit depending on the flow rate as controlled by the fan, allowing the distribution or CO 2 to be done evenly.
According to a favourable embodiment, the upright support is provided with a sensor for measuring a parameter chosen from i) the temperature, ii) the relative humidity, iii) the CO2concentration, and iv) amount of light.According to a favorite embodiment, the support is provided with a sensor for measuring a parameter chosen from i) the temperature, ii) the relative humidity, iii) the CO 2 concentration, and iv) amount of light.
This allows for improved local control of the growth conditions, including the climate, in the greenhouse.This allows for improved local control of the growth conditions, including the climate, in the greenhouse.
According to a favourable embodiment, the fan of an upright support is in the top half of the upright support.According to a favorite embodiment, the fan of an upright support is in the top half of the upright support.
Thus the amount of energy used for operating the fan can be reduced. The fan is preferably present in the top third, more preferably in the top quarter of the upright support.Thus the amount of energy used for operating the fan can be reduced. The fan is preferably present in the top third, more preferably in the top quarter of the upright support.
According to a favourable embodiment, the greenhouse comprises an element chosen from a ridge profile and a gutter profile as part of the roof, and the element is provided with an electrical cable for supply of power to the fan of an upright.According to a favorite version, the greenhouse comprises an element chosen from a ridge profile and a gutter profile as part of the roof, and the element is provided with an electrical cable for supply or power to the fan of an upright.
Thus the electrical cable does not interfere with operations in the greenhouse. In particular it is not hindered by a screen. The profiles are typically manufactured by extrusion, which allows for a lip or conduit extending over the length of the profile into which the cable will be provided to power the fan and/or sensor.Thus the electrical cable does not interfere with operations in the greenhouse. In particular it is not hindered by a screen. The profiles are typically manufactured by extrusion, which allows for a lip or conduit extending over the length of the profile into which the cable will be provided to power the fan and / or sensor.
The present invention will now be illustrated with reference to the drawing whereThe present invention will now be illustrated with reference to the drawing where
Fig. 1 shows a perspective view of a part of a greenhouse;FIG. 1 shows a perspective view or a part of a greenhouse;
Fig. 2 shows a cross-sectional, non-perspective view of a part of a greenhouse according to a first embodiment of the invention;FIG. 2 shows a cross-sectional, non-perspective view or a part of a greenhouse according to a first embodiment of the invention;
Fig. 3 shows a cross-sectional view of a part of a greenhouse according to a second embodiment of the invention; andFIG. 3 shows a cross-sectional view or a part of a greenhouse according to a second embodiment of the invention; and
Fig. 4 shows a cross-sectional view of a part of a greenhouse according to a third embodiment of the invention.FIG. 4 shows a cross-sectional view or a part of a greenhouse according to a third embodiment of the invention.
Fig. 1 shows a perspective view of a part of a greenhouse 100, which greenhouse 100 comprises walls 110, a roof 120 comprising sloping sections 121. The sloping sections 121', 121 are separated by a ridges 122 and troughs 123. The troughs 123 are in the form of gutters 123 for collecting water from the roof. The roof 120 also contains windows 124 which are opened for example to get rid of an excess of heat or to reduce the air humidity inside the greenhouse 100 .FIG. 1 shows a perspective view of a part of a greenhouse 100, which greenhouse 100 comprises walls 110, a roof 120 including sloping sections 121. The sloping sections 121 ', 121 are separated by a ridges 122 and troughs 123. The troughs 123 are in the form of gutters 123 for collecting water from the roof. The roof 120 also contains windows 124 which are opened for example to get rid of an excess of heat or to reduce the air humidity inside the greenhouse 100.
Typically the ridges 122 will be made of extruded ridge profiles and the gutters will be made of extruded gutter profiles.Typically the ridges 122 will be made of extruded ridge profiles and the gutters will be made of extruded gutter profiles.
Inside the greenhouse 100 there are upright supports 150. The upright supports 150 support trusses 160. The trusses 160 support the gutters 123 which run transverse to the trusses 160.Inside the greenhouse 100 there are upright supports 150. The upright supports 150 support trusses 160. The trusses 160 support the gutters 123 which run transverse to the trusses 160.
The greenhouse 100 further comprises screens 130', 130, at a relatively low level and a relatively high level respectively, for controlling the climate in the greenhouse. There is a roof space 141 between the upper screen 130 and the roof 120.The greenhouse 100 further comprises screens 130 ', 130, at a relatively low level and at a relatively high level respectively, for controlling the climate in the greenhouse. There is a roof space 141 between the upper screen 130 and the roof 120.
In accordance with the present invention, the upright supports 150 serve a second purpose, more specifically they are hollow and serve as air conduits to circulate air through the greenhouse 100. The upright supports 150 have lower openings 151, and a fan 152 for moving air from the roof space 141 through the hollow upright supports 150, and leave said upright supports 150 via the openings 151.In accordance with the present invention, the upright supports 150 serve a second purpose, more specifically they are hollow and serve air conduits to circulate air through the greenhouse 100. The upright supports 150 have lower openings 151, and a fan 152 for moving air from the roof space 141 through the hollow upright supports 150, and leave said upright supports 150 through the opening 151.
Fig. 2 shows a cross-sectional, non-perspective view of a part of a greenhouse 100 according to a first embodiment of the invention.FIG. 2 shows a cross-sectional, non-perspective view or a part of a greenhouse 100 according to a first embodiment of the invention.
In this first embodiment the upright support 150 supports the gutter 123, and extends beyond the trusses 160 to which it is also connected. Slits between screens allow for air to return from the growth area to the roof area.In this first embodiment the upright support 150 supports the gutter 123, and extends beyond the trusses 160 to which it is also connected. Slits between screens allow for air to return from the growth area to the roof area.
This may for example serve to reduce air humidity in the greenhouse 100, as water can condense against the downward facing sides of the sloping sections 121, 121' of the roof 120. The water will be collected by the gutters 123 and flows away.This may for example serve to reduce air humidity in the greenhouse 100, as water can condense against the downward facing sides of the sloping sections 121, 121 'or the roof 120. The water will be collected by the gutters 123 and flows away.
To supplement air withdrawn from the roof space 141 (if windows 124 are closed), a secondary conduit 250 may provided, which may advantageously be provided with a fan. This helps to reduce the ingress of outside air due to sub-atmospheric pressure because the roof may not be entirely air tight.To supplement air withdrawn from the roof space 141 (if windows 124 are closed), a secondary conduit 250 may be provided, which may be advantageously provided with a fan. This helps to reduce the ingress of outside air due to sub-atmospheric pressure because the roof may not be entirely air tight.
A conduit 250 may also be used to allow the passage of air from the greenhouse 100 below the relatively low screen 130' to the roof space 141 above the relatively high screen 130, bypassing the space between the screens 130', 130. In the embodiment shown here, the upright support 150 is provided with an electric heating element 270 for changing the temperature of air flowing through the upright support 150 before it leaves the outlet opening 151.A conduit 250 may also be used to allow the passage of air from the greenhouse 100 below the relatively low screen 130 'above the relatively high screen 130, above the relatively high screen 130, bypassing the space between the screens 130', 130. In the edition shown here, the upright support 150 is provided with an electric heating element 270 for changing the temperature or air flowing through the upright support 150 before it leaves the outlet opening 151.
The upright support 150 is provided with a sensor-unit 280 comprising a sensor for detecting air humidity, a sensor for detecting the temperature and a sensor for detecting the CO2concentration.The upright support 150 is provided with a sensor unit 280 including a sensor for detecting air humidity, a sensor for detecting the temperature and a sensor for detecting the CO 2 concentration.
Plants 290 are grown using growth gutters which are hung by threads 291 from the trusses 160.Plants are grown using growth gutters which are hung by threads 291 from the trusses 160.
Fig. 3 shows across-sectional view of a part of a greenhouse 100 according to a second embodiment of the invention. It corresponds substantially to Fig. 2, with the following exceptions.FIG. 3 shows across-sectional view or a part of a greenhouse 100 according to a second embodiment of the invention. It satisfies substantially to FIG. 2, with the following exceptions.
The upright support is connected to the truss 160 only, not to the gutter 123 and is positioned away from the gutters 123, below the ridge 122. Thus a different flow of air can be achieved in the roof space 141.The upright support is connected to the truss 160 only, not to the gutter 123 and is positioned away from the gutters 123, below the ridge 122. Thus a different flow of air can be achieved in the roof space 141.
In the embodiment shown here, there is a fan 152' located between the two screens, for extracting air from between said two screens. This allows for local recirculation without passing the air along the roof 120.In the embodiment shown here, there is a fan 152 'located between the two screens, for extracting air from between said two screens. This allows for local recirculation without passing the air along the roof 120.
In the embodiment shown here, there is a fan 152 in the outlet opening 151, allowing air to be extracted via inlet opening 351 of the upright support 150.In the embodiment shown here, there is a fan 152 in the outlet opening 151, allowing air to be extracted through inlet opening 351 or the upright support 150.
Fig. 4 shows a cross-sectional view of a part of a greenhouse 100 according to a third embodiment of the invention. In the embodiment shown here, lower opening 151 and upper opening 152 can serve both as an inlet for air into the hollow upright. A fan 152' is located in the intermediate opening 453 between the lower opening 151 and upper opening 152 at a height lower than a screen 130 and preferably higher than the canopy of the plants 290. A valve 455, preferably a two-way valve 455, is associated with the fan. The fan 152' can draw air via the interior of the hollow upright from the lower part of the growth space 140 through the lower opening 151 or from the roof space 141 through the upper opening 152 or from both said spaces and discharge it into the upper part of the growth space over the canopy of the plants. This allows for mixing of air, having different characteristics such as temperature or humidity, drawn from the roof space and from the lower part of the growth space.FIG. 4 shows a cross-sectional view or a part of a greenhouse 100 according to a third embodiment of the invention. In the embodiment shown here, lower opening 151 and upper opening 152 can serve both as an inlet for air into the hollow upright. A fan 152 'is located in the intermediate opening 453 between the lower opening 151 and upper opening 152 at a height lower than a screen 130 and preferably higher than the canopy of the plants 290. A valve 455, preferably a two-way valve 455 , is associated with the fan. The fan 152 'can draw air through the interior of the hollow space from the lower part of the growth space 140 through the lower opening 151 or from the roof space 141 through the upper opening 152 or from both said spaces and discharge it into the upper part of the growth space over the canopy of the plants. This allows for mixing of air, having different characteristics such as temperature or humidity, drawn from the roof space and from the lower part of the growth space.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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NL1042790 | 2018-03-14 |
Publications (2)
Publication Number | Publication Date |
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NL1043187A NL1043187A (en) | 2019-09-25 |
NL1043187B1 true NL1043187B1 (en) | 2019-10-04 |
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NL1043187A NL1043187B1 (en) | 2018-03-14 | 2019-03-13 | A greenhouse with air conduits for climate control |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022063875A1 (en) | 2020-09-24 | 2022-03-31 | Alcomij Beheer B.V. | Greenhouse comprising a climate control system |
NL1043795B1 (en) | 2020-09-24 | 2022-05-30 | Alcomij Beheer Bv | Greenhouse comprising a climate control system |
NL1043812B1 (en) | 2020-10-08 | 2022-06-07 | Alcomij Beheer Bv | Climate control system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1044126B1 (en) | 2021-08-24 | 2023-03-13 | Alcomij Beheer Bv | A planar truss |
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2019
- 2019-03-13 NL NL1043187A patent/NL1043187B1/en active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022063875A1 (en) | 2020-09-24 | 2022-03-31 | Alcomij Beheer B.V. | Greenhouse comprising a climate control system |
NL1043795B1 (en) | 2020-09-24 | 2022-05-30 | Alcomij Beheer Bv | Greenhouse comprising a climate control system |
NL1043812B1 (en) | 2020-10-08 | 2022-06-07 | Alcomij Beheer Bv | Climate control system |
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NL1043187A (en) | 2019-09-25 |
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