NL2024182B1 - Horticultural or agricultural greenhouse - Google Patents
Horticultural or agricultural greenhouse Download PDFInfo
- Publication number
- NL2024182B1 NL2024182B1 NL2024182A NL2024182A NL2024182B1 NL 2024182 B1 NL2024182 B1 NL 2024182B1 NL 2024182 A NL2024182 A NL 2024182A NL 2024182 A NL2024182 A NL 2024182A NL 2024182 B1 NL2024182 B1 NL 2024182B1
- Authority
- NL
- Netherlands
- Prior art keywords
- air
- greenhouse
- ventilation
- roof
- horticultural
- Prior art date
Links
Classifications
-
- 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
-
- 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
- A01G9/22—Shades or blinds for greenhouses, or the like
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Greenhouses (AREA)
Abstract
The invention relates to a horticultural greenhouse, comprising: multiple rows of support columns; a roof that is supported by the columns and that comprises a roof passage; a fabric screen for darkening and/or thermally shielding the greenhouse, wherein the fabric screen extends in a horizontal separation plane that divides the greenhouse in a cxdtivation space and a roof space; and a first ventilation arrangement, wherein the first ventilation arrangement comprises a first ventilation device for displacing' air, and. a first air duct with a first air inlet, a first air outlet, and a first air channel between the first air inlet and the first air outlet, wherein the first air channel debouches into the air outside of the greenhouse, wherein the first air channel passes through the separation. plane, and. wherein the first 'ventilation_ device is arranged. for drawing' air into the first air channel.
Description
P136988NL00 Horticultural or agricultural greenhouse
BACKGROUND The invention relates to a horticultural or agricultural greenhouse for cultivating crops therein. Known greenhouses are provided close to the roof with at least one horizontally suspended fabric screen which defines a cultivation space for cultivating crops therein under the fabric screen and a roof space separated from the cultivation space. The fabric screen comprises at least one passage between the roof space and the cultivation space. The greenhouse further comprises a ventilation system with air displacing means for displacing air in the cultivation space of the greenhouse. At least one of the air displacing means is situated close to the passage in the fabric screen and is configured to draw in and subsequently displace air from both the roof space and the cultivation space. The ventilation system is arranged within the passage of the fabric screen and is connected to the fabric screen.
SUMMARY OF THE INVENTION A disadvantage of the known horticultural greenhouse is that in order to cool and/or dehumidify the cultivation space, ventilation windows in the roof of the greenhouse need to be opened to allow cool and/or dry fresh air to enter the greenhouse via the roof space. Therefore,
during cooling and/or dehumidifying of the cultivation space the conditions of the air in the roof space may be negatively influenced. For instance, because the fresh air entering the greenhouse through the ventilation windows reduces the C02 level in the roof space.
It is an object of the present invention to overcome or to ameliorate the disadvantage of the known greenhouse.
According to a first aspect, the invention provides a horticultural greenhouse for cultivating crops therein, comprising: multiple rows of support columns forming a roof support construction; a roof that is supported by the roof support construction, and that separates the greenhouse from the environment, wherein the roof of the greenhouse comprises a roof passage; a fabric screen for at least partially darkening and/or thermally shielding the greenhouse, wherein the fabric screen extends in a horizontal separation plane within the greenhouse that divides the greenhouse in a cultivation space below the separation plane and a roof space above the separation plane; and a ventilation system comprising a first ventilation arrangement, wherein the first ventilation arrangement comprises a first ventilation device for displacing air within the greenhouse, and a first air duct with a first air inlet, a first air outlet, and a first air channel extending between the first air inlet and the first air outlet, wherein the first air channel debouches into the air outside of the greenhouse via the roof passage, wherein the first air channel passes through the separation plane, and wherein the first ventilation device is arranged for drawing air into the first air channel.
When the screens in the greenhouse according to the invention are closed, the roof space comprises a stock of air having specific and well measurable conditions. As the first air duct of the ventilation system passes through the separation plane and the roof space it is possible to draw fresh alr into the cultivation space without altering the specific conditions of the stock of air in the roof space. The cultivation space can thus be ventilated without influencing the conditions of the air in the roof space. Furthermore, as the first ventilation device is in direct air communication with the outside air of the greenhouse, the effectiveness of ventilating the greenhouse can be achieved independently of the position of the fabric screens, i.e. opened or closed.
In an embodiment the first air duct is connected to the roof passage in order to further optimize the air flow between the cultivation space and the outside air of the greenhouse.
In an embodiment the first air duct defines the roof passage. The first air duct is part of the roof construction in order to strengthen the roof construction near the roof passage.
In an embodiment the first ventilation arrangement comprises a closing panel that is configured to move between a first position in which the closing panel closes the first air channel, and a second position in which the closing panel allows air to pass through the first air channel. The closing panel can be opened when the outside air conditions are favorable to ventilate the greenhouse and can be closed when the outside air conditions are unfavorable to ventilate the greenhouse. In this way the efficiency of the ventilation system is further increased.
In an embodiment the first ventilation device comprises a first fan connected to the first air duct at the first air outlet thereof for drawing air into the first air channel. By placing the first fan inside the cultivation space it can be serviced in a straightforward manner.
In an embodiment thereof the first ventilation device comprises a first air blender that is provided between the first air outlet of the first air duct and the first fan, wherein the first air blender comprises a first blender inlet that is in air communication with the first air outlet, a second blender inlet that is in air communication with the cultivation space, and a blender outlet that is in air communication with the first fan, wherein the first air blender is configured for providing an air blend from air from outside the greenhouse and air from the cultivation space to the first fan. By providing the first air blender, the air drawn from outside the greenhouse can be actively blended with air from inside the cultivation space. The desired conditions in the cultivation space can then be obtained more quickly.
In an embodiment the first air blender comprises blending flaps that are movable between a first position in which the first blender inlet is closed off, and a second position in which the second blender inlet is closed off. When the condition of the air within the cultivation space is as desired, it may be sufficient to just circulate the air within the cultivation space without adding air from outside the greenhouse. Otherwise, it may be necessary to draw air from outside the greenhouse into the cultivation space in order to adapt the condition of the air within the cultivation space. By providing the blending flaps the amount of air to be drawn from outside the greenhouse or the cultivation space can be regulated.
In an embodiment the first ventilation arrangement is provided with a first heat exchanger that is arranged for exchanging thermal energy with the air displaced by the first ventilation device. With the heat exchanger it is possible to adjust the temperature within the cultivation space while being less dependent of the temperature of the air from outside the greenhouse.
In an embodiment the first ventilation arrangement 1s arranged to blow air into the cultivation space in a direction parallel to the longitudinal direction of the greenhouse. In an embodiment thereof ventilation system comprises a row of multiple first ventilation arrangements, wherein the row of multiple ventilation arrangements is arranged parallel to the transverse direction of the greenhouse. In a further embodiment thereof the ventilation system comprises multiple rows of first ventilation arrangements, wherein the rows of first 5 ventilation arrangements are arranged at a distance from each other in the longitudinal direction of the greenhouse. In this arrangement it is possible to ventilate the complete area of the cultivation space in an efficient manner.
In an embodiment the ventilation system comprises a second ventilation arrangement, wherein the second ventilation arrangement comprises a second ventilation device for displacing air within the greenhouse, and a second air duct with a second air inlet, a second air outlet, and a second air channel extending between the second air inlet and the second air outlet, wherein the second air channel debouches into the roof space of the greenhouse, and wherein the second ventilation device is arranged for drawing air into the second air channel.
By adding the second ventilation arrangement to the greenhouse it is possible to draw air directly from the stock of air in the roof space into the cultivation space. Therefore the cultivation space of the greenhouse can be supplied with air from outside the greenhouse, air from the stock of air in the roof space, or air from both. This further increases the conditioning flexibility of the greenhouse.
In an embodiment the second ventilation device comprises a second fan that is connected to the second air duct at the second air outlet thereof for drawing air into the second air channel. By placing the second fan inside the cultivation space it can be serviced in a straightforward manner.
In an embodiment the second ventilation device comprises a second air blender that is provided between the second air outlet of the second air duct and the second fan, wherein the second air blender comprises a first blender inlet that is in air communication with the second air outlet, a second blender inlet that is in air communication with the cultivation space, and a blender outlet that is in air communication with the second fan, wherein the second air blender is configured for providing an air blend from air from the roof space and air from the cultivation space to the second fan. By providing the second air blender, the air drawn from the roof space is actively blended with air from inside the cultivation space. The desired conditions in the cultivation space can be obtained more quickly.
In an embodiment the second air blender comprises blending flaps that are movable between a first position in which the first blender inlet is closed off, and a second position in which the second blender inlet is closed off. When the condition of the air within the cultivation space is as desired, it may be sufficient to just circulate the air within the cultivation space without adding air from the roof space. Otherwise, it may be necessary to draw air from the roof space into the cultivation space in order to adapt the condition of the air within the cultivation space. By providing the blending flaps the amount of air to be drawn from the roof space or the cultivation space can be regulated.
In an embodiment the second ventilation arrangement is provided with a second heat exchanger that is arranged for exchanging thermal energy with the air displaced by the second ventilation device. With the heat exchanger it is possible to adjust the temperature within the cultivation space while being less dependent of the temperature of the air from the roof space.
In an embodiment the second ventilation arrangement 1s arranged to blow air into the cultivation space in a direction parallel to the longitudinal direction of the greenhouse. In an embodiment thereof the ventilation system comprises a row of at least one first ventilation arrangement and at least one second ventilation arrangement, wherein said row is arranged parallel to the transverse direction of the greenhouse. In a further embodiment thereof the ventilation system comprises multiple rows of at least one first ventilation arrangement and at least one second ventilation arrangement, wherein said rows are arranged at a distance from each other in the longitudinal direction of the greenhouse. In this arrangement it is possible to ventilate the complete area of the cultivation space in an even more efficient manner. In an embodiment the ventilation system comprises a top beam extending parallel to the separation plane, and wherein the first air duct or the second air duct is supported by the top beam. The top beam is connected to the roof support construction and suspends the air duct above the cultivation area in order keep the cultivation area free of hindering objects.
In an embodiment the top beam comprises at least one top beam passage and the first air channel or the second air channel extends through the at least one top beam passage. The top beam is arranged in the separation plane. By including the passage in the top beam the air duct does not obstruct with the fabric screens.
In an embodiment the roof support construction comprises transverse {frames for supporting the roof, wherein the top beam extends between subsequent transverse frames in a direction transverse thereto, and wherein the fabric screen is guided along the longitudinal sides of the top beam between the subseguent transverse frames. In this configuration the screens can move unobstructed between the open and closed position along the top beam.
In an embodiment the roof support construction comprises transverse {frames for supporting the roof, wherein the top beam extends parallel along and is secured to one of the transverse frames, and wherein the top beam 1s arranged between the respective transverse frame and the fabric screen. In this configuration the screens can move unobstructed between the open and closed position. The transverse frame adds rigidity to the ventilation arrangement.
According toe a second aspect, the invention provides a ventilation system for use in a horticultural greenhouse according to the first aspect of the invention.
According to a third aspect, the invention provides a first ventilation arrangement for use in a horticultural greenhouse according to the first aspect of the invention, or in a ventilation system according to the second aspect of the invention.
According toe a fourth aspect, the invention provides a method for climate control in a cultivation space in a horticultural greenhouse according to the first aspect of the invention, the method comprising the steps of: by the first ventilation device, displacing air within the cultivation space; by the first ventilation device, displacing air from outside the greenhouse into the cultivation space; or by the first ventilation device, displacing air within the cultivation space and from outside the greenhouse into the cultivation space.
In an embodiment when the ventilation system comprises the second ventilation arrangement, the method further comprising the steps of: by the second ventilation device, displacing air within the cultivation space; by the second ventilation device, displacing air between the roof space and the cultivation space; or by the second ventilation device, displacing air within the cultivation space and between the roof space and the cultivation space.
The various aspects and features described and shown in the specification can be applied, individually, wherever possible. These individual aspects, in particular the aspects and features described in the attached dependent: claims, can be made subject of divisional patent applications.
BRIEF DESCRIPTION OF THE DRAWINGS The invention will be elucidated on the basis of an exemplary embodiment shown in the attached drawings, in which: Figure 1 shows a schematic overview of a part of a horticultural greenhouse with multiple rows of support columns connected by transverse frames, and a ventilation system according to an embodiment of the invention; Figures ZA-B respectively show an enlarged view and a side view of a first ventilation arrangement of the ventilation system according to figure 1; Figure 3 shows an isometric view of a second ventilation arrangement of the ventilation system according to figure 1; and Figure 4A and 4B respectively show a part of the greenhouse of figure 1 having an alternative setup of the ventilation system, and an isometric view of a ventilation arrangement of the ventilation system of figure 4A.
DETAILED DESCRIPTION OF THE INVENTION Figure 1 shows an agricultural or horticultural greenhouse 1 according to an embodiment of the invention. The partially shown greenhouse 1 is in this example a Venlo type greenhouse, and comprises a number of identical metal columns 2, for example metal lattice columns, that are positioned spaced apart and in rows oriented in the Longitudinal direction L of the greenhouse 1. The lattice columns 2 are connected by means of metal transverse frames 10 that extend in the transverse direction T of the greenhouse 1, for forming a supporting structure for a roof
40. The transverse frames 10 comprise a horizontal top bar 11, a horizontal bottom bar 12 extending below the top bar 11, and diagonal brace struts 13 there in between.
The roof 40 of the greenhouse 1 comprises multiple identical support gutters 41 that extend parallel to each other in the longitudinal direction L of the greenhouse 1. The support gutters 41 are in the transverse direction T of the greenhouse 1 alternately supported by the columns 2 or by the transverse frames 10. The roof 40 comprises multiple roof ridges 42 that extend parallel to the support gutters 41 in the longitudinal direction L of the greenhouse 1. The support gutters 41 and the higher situated roof ridges 42 alternate in the transverse direction T of the greenhouse 1. The roof 40 comprises multiple glass rods 43 that extend in the transverse direction T of the greenhouse 1 between the support gutters 41 and the roof ridges 42, and glass panels 44 that are along their circumference supported by the support gutters 41, the roof ridges 42 and the glass rods 43. The roof 40 separates the greenhouse 1 from the environment. The roof 40 has at least one roof passage 45. In this example the roof passage 45 has a rectangular shape and is located near one of the roof ridges 42.
The greenhouse 1 comprises multiple screens 20 that are provided between pairs of subsequent transverse frames 10, and parallel guiding wires 21 that extend in the longitudinal direction L of the greenhouse 1 between the top bars 12 thereof. Each of the screens 20 is slidably supported and guided along one or more of the guiding wires
21. For the sake of clarity, only one screen 20 and two guiding wires 21 are shown, while in practice a plurality of parallel screens 20 and guiding wires 21 is provided.
The screens 20 are moveable between the shown open state, and a non-shown closed state. In the closed state the screens 20 extend in a substantially horizontal separation plane S and bound, together with the roof 40, a roof space 6 that is located above the separation plane S, and bound, together with the non-shown side walls of the greenhouse 1, a cultivation space 7 that is located below the separation plane S. In the closed state the screens 20 darken and thermally shield the entire cultivation area of the greenhouse 1.
The horticultural greenhouse 1 comprises a ventilation system 5 with a first ventilation arrangement 30 for circulating air in the cultivation space 7 and for drawing fresh air from outside the greenhouse 1 into the cultivation space 7, and a second ventilation arrangement 130 for circulating air in the cultivation space 7 and for drawing air from the roof space 6 into the cultivation space 7.
As shown in figures 1, ZA and ZB the first ventilation arrangement 30 comprises a first top beam 31 extending between and substantially transverse to the two subsequent transverse frames 10 in the separation plane S. Subsequent screens 20 are guided substantially along both longitudinal sides of the first top beam 31.
As best shown in figures 2A and 2B the first top beam 31 has two oblique first top beam legs 32, 33 which merge into a first top beam center section 34. The first top beam 31 comprises an elongated first top beam passage 35 within the first top beam center section 34. The first ventilation arrangement 30 comprises a first bottom beam 70 which 1s provided below and substantially parallel to the first top beam 31 and that extends between and substantially transverse to the two subsequent transverse frames 10. The first bottom beam 70 has two oblique first bottom beam legs 71, 72 which merge into a first bottom beam center section 73. The first bottom beam 70 comprises an elongated first bottom beam passage 74 within the first bottom beam center section 73. The first bottom beam passage 74 is located directly below and is aligned with the first top beam passage 35. By means of the first bottom beam 70, it is possible to provide additional non-shown fabric screens within the greenhouse 1.
The first ventilation arrangement 30 comprises a first air duct 36 that is arranged at and supported by the first top beam 31 and the first bottom beam 70. The first air duct 36 comprises a first top duct section 37, a first intermediate duct section 38 and a first bottom duct section 39 which are arranged in series. The first top duct section 37 is mounted to the first top beam 31 around the first top beam passage 35 and extends therefrom towards the roof passage 45. The first top duct section 37 has a rectangular cross section, and converges in a first direction D from the roof 40 towards the first top beam 31. The first intermediate duct section 38 extends between the first top beam 31 and the first bottom beam 70 and is respectively mounted thereto around the first top beam passage 35 and the first bottom beam passage 74. The first intermediate duct section 38 has a rectangular cross section that is substantially constant in the first direction D. The first lower duct section 39 is mounted to the first bottom beam 70 around the first bottom beam passage 74 and extends therefrom downwards into the cultivation space 7. The first lower duct section 39 has a rectangular cross section and in the first direction D away from the {first bottom beam 70 diverges substantially parallel to the transverse direction T of the greenhouse 1, and converges substantially parallel to the longitudinal direction L of the greenhouse 1. The first air duct 36, at the end of the first top duct section 37 near the roof 40, defines a rectangular first air inlet 90 that is near and/or adjacent to the roof passage 45, and, at the end of the first bottom duct section 39 in the cultivation space 7, the first air duct 36 defines a substantially sqvare shaped first air outlet
91. The first top duct section 37, the first intermediate duct section 38 and the first bottom duct section 39 of the first air duct 36 together define a first air channel 92 that extends between the first air inlet 90 and the first air outlet 91.
In this example the first air inlet 90 and the roof passage 45 are arranged near and/or adjacent with respect to each other. The first top duct section 37 of the first air duct 36 may also be part of the construction of the roof 40 and therewith define the roof passage 45 in the roof 40. The first top duct section 37 may also extend through the roof 40 and therewith define the roof passage 45 in the roof 40. The first air outlet 91 is located below the first bottom beam 70 in the cultivation space 7 of the greenhouse 1. The first air outlet 91 may also be located near or coincide with the first bottom beam passage 74 within the first bottom beam 70 or it may be located near or coincide with the first top beam passage 35 within the first top beam 31 adjacent to the cultivation space 7.
The first ventilation arrangement 30 comprises a closing panel 46 that is hingeably attached to the roof 40 near the roof passage 45, and closing panel actuators 47 that are attached between the roof 40 and the closing panel
46. The closing panel actuators 47 are configured to move the closing panel 46 between a first position in which the closing panel 46 closes off and/or seals the first air channel 92, and a second position in which the closing panel 46 extends away from the roof 40 to allow fresh air to pass into the first air channel 92.
The first ventilation arrangement 30 is provided with a first ventilation device 50 comprising a first air blender 60 that is connected to the first air outlet 91, and a first fan 67 that is connected to the first air blender 60. The first air blender 60 comprises a first blender housing 61 that defines a first blender inlet 63 at the topside thereof and that is connected to the first air outlet 91, a second blender inlet 64 that is in air communication with the cultivation space 7, and a blender outlet 65 opposite to the second blender inlet 64 and that is connected to the first fan 67. The first blender housing 61 defines a first blending space 62 between the first blender inlet 63, the second blender inlet 64 and the blender outlet 65. The first air blender 60 comprises first blending flaps 66 that are provided parallel to each other within the first blending space 62. The first blending flaps 66 are rotatable about a rotation axis R substantially parallel to the transverse direction T of the greenhouse 1. The first fan 67 in this example is an axial fan comprising fan blades that are rotatable by a motor.
When the first fan 67 is activated, air is drawn into the first air blender 60. When the first blending flaps 66 are in a horizontal first position the first blender inlet 63 is closed off and air is drawn into the first blending space 62 from the cultivation space 7, and when the first blending flaps 66 are in a substantially vertical second position the second blender inlet 64 is closed off and air is drawn into the first blending space 62 from outside the greenhouse 1. By adjusting the orientation of the first blending flaps 66, the ratio of air from outside the greenhouse 1 and air from the cultivation space 7 can be regulated.
The first air blender 60 then provides an air blend from air from outside the greenhouse 1 and air from the cultivation space 7 to the first fan 67. The horticultural greenhouse 1 further comprises a first heat exchanger 80 that is arranged downstream of the first fan 65. Air from the first air blender 60 flows along the first heat exchanger 80 in order to cool or heat the passing air.
In this example the first fan 65 and the first heat exchanger 80 are arranged downstream with respect to the first air blender 60. It is to be understood that the first fan 65 and/or the first heat exchanger 80 may also be arranged upstream with respect to the first air blender 60. As shown in figures 1 and 3, the second ventilation arrangement 130 of the horticultural greenhouse 1 comprises a second top beam 131 extending between and substantially transverse to the two subsequent transverse frames 10 in the separation plane S$. Subsequent screens 20 are guided substantially along both longitudinal sides of the second top beam 131. As best shown in figure 3 the second top beam 131 has two oblique second top beam legs 132, 133 which merge into a second top beam center section 134. The second top beam 131 comprises an elongated second top beam passage 135 within the second top beam center section 134. The second ventilation arrangement 130 comprises a second bottom beam 170 which is provided below and substantially parallel to the second top beam 131 and that extends between and substantially transverse to the two subsequent transverse frames 10. The second bottom beam 170 has two oblique second bottom beam legs 171, 172 which merge into a second bottom beam center section 173. The second bottom beam 170 comprises an elongated second bottom beam passage 174 within the second bottom beam center section 173. The second bottom beam passage 174 is located directly below and is aligned with the second top beam passage 135. By means of the second bottom beam 170, it is possible to provide additional non-shown fabric screens within the greenhouse 1.
The second ventilation arrangement 130 comprises a second air duct 136 that is arranged at and supported by the second top beam 131 and the second bottom beam 170. The second air duct 136 comprises a second top duct section 137 and a second bottom duct section 139 which are arranged in series. The second top duct section 137 extends between the second top beam 131 and the second bottom beam 170 and is respectively mounted thereto around the second top bean passage 135 and the second bottom beam passage 174. The second top duct section 137 has a rectangular cross section that is substantially constant in the first direction D. The second lower duct section 139 is mounted to the second bottom beam 170 around the second bottom beam passage 174 and extends therefrom downwards into the cultivation space
7. The second lower duct section 139 has a rectangular cross section and in the first direction D away from the second bottom beam 170 diverges substantially parallel to the transverse direction T of the greenhouse 1, and converges substantially parallel to the longitudinal direction L of the greenhouse 1.
The second air duct 136, at the end of the second top duct section 137 at the second top beam 131, defines a rectangular second air inlet 190 adjacent to the roof space 6, and, at the end of the second bottom duct section 139 in the cultivation space 7, the second air duct 136 defines a substantially square shaped second air outlet 191. The second top duct section 137 and the second bottom duct section 139 of the second air duct 136 together define a second air channel 192 that extends between the second air inlet 190 and the second air outlet 191.
In this example the second air outlet 191 is located below the second bottom beam 170 in the cultivation space 7 of the greenhouse 1. The second air outlet 191 may also be located near or coincide with the second bottom beam passage 174 within the second bottom beam 170 or it may be located near or coincide with the second top beam passage 135 within the second top beam 131 adjacent to the cultivation space 7.
The second ventilation arrangement 130 is provided with a second ventilation device 150 comprising a second air blender 160 that is connected to the second air outlet 191, and a second fan 167 that is connected to the second air blender 160. The second ventilation device 150 comprises substantially the same features as the first ventilation device 50 as shown in figures 2A and 2B. Corresponding features are not reintroduced and are referred to with the same reference numbers increased by
100.
The function of the second ventilation device 150 differs from the function of the first ventilation device 50 in that, when the second blending flaps 166 are in a substantially vertical second position the second blender inlet 164 is closed off and air is drawn into the second blending space 62 from the roof space 6. By adjusting the orientation of the second blending flaps 166, the ratio of air from the roof space 6 and air from the cultivation space 7 can be regulated. The second air blender 160 then provides an air blend from air from the roof space 6 and alr from the cultivation space 7 to the second fan 167. The horticultural greenhouse 1 further comprises a second heat exchanger 180 that is arranged downstream of the second fan 165 and that comprises substantially the same features as the first heat exchanger 80 as shown in figures ZA and 2B.
As shown in figure 1 the ventilation system 5 of the horticultural greenhouse 1 comprises the first ventilation arrangement 30 and the second ventilation arrangement 130 that are arranged in a row substantially parallel to the transverse direction T of the greenhouse 1, and that are arranged to blow air into the cultivation space 7 in the same direction substantially parallel to the longitudinal direction L of the greenhouse 1. It is to be understood that the ventilation arrangements 30, 130 of the ventilation system 5 may be arranged in alternative ways.
For instance the ventilation system 5 may comprises only the first ventilation arrangements 30 or only the second ventilation arrangements 130. The ventilation arrangements 30, 130 may be arranged to blow air into the cultivation space 7 of the greenhouse 1 in opposite directions.
Multiple rows of ventilation arrangements 30, 130 may be provided within the horticultural greenhouse 1. In that case, the rows of ventilation arrangements 30, 130 are arranged at a distance from each other in the longitudinal direction L of the greenhouse 1. Figure 4A partially shows the horticultural greenhouse of figure 1 comprising a ventilation system 205 having an alternative setup for the second ventilation arrangement 130. Corresponding features are not reintroduced and are referred to with the same reference numbers increased by 100 or 200. The ventilation system 205 of the horticultural greenhouse 200 differs from the ventilation system 5 of figure 1 in that it comprises a ventilation arrangement 230 for arranging multiple ventilation devices 250 in the greenhouse 200, in particular at one of the transverse frames 210 thereof. The ventilation arrangement 230 comprises a U-shaped top beam 231 extending over substantially the whole length of the respective transverse frame 210. The U-shaped top beam 231 is provided between the respective transverse frame 210 and the screen 220 is suspended Lo the respective transverse frame 210. The screen 220 is attached to the U-shaped top beam 231 thereof.
As best shown in figure 4B the U-shaped top beam 231 has two parallel top beam legs 232, 233 which merge into a top beam center section 234. The U-shaped top beam 231 comprises elongated top beam passages 235 within the top beam center section 234, The ventilation arrangement 230 comprises, in this example, two air ducts 236 that are arranged at and supported by the U-shaped top beam 231. Each air duct 236 is mounted to the top beam 230 around one of the top beam passages 235 and extends therefrom downwards into the cultivation space 207. Each air duct 236 has a rectangular cross section and in a first direction D away from the U- shaped top beam 231 converges substantially parallel to the transverse direction T of the greenhouse 200, and diverges substantially parallel to the longitudinal direction L of the greenhouse 200.
Each air duct 236, at its end at the U-shaped top bar, defines a rectangular air inlet 290 that correspond to the top beam passage 235, and, at the opposite end, each air duct 236 defines a substantially square shaped air outlet 291. Each air duct 236 defines an air channel 292 that extends between the air inlet 290 and the air outlet
291.
The above described ventilation arrangement 230 is similar to the second ventilation arrangement 130 of figures 1 and 3 in that the air inlets 290 are adjacent to the roof space 206. The ventilation arrangement 230 can also be embodied similar to the first ventilation arrangement 30 of figures 1, 2A and 2B, wherein at least one of the air inlets 290 is near and/or adjacent to a roof passage that is provided in the roof of the greenhouse 200. The horticultural greenhouse 200 may be provided with a heat exchanger similar to the first heat exchanger 80 and the second heat exchanger 180 of figure 1.
It is to be understood that the above description is included to illustrate the operation of the preferred embodiments and is not meant to limit the scope of the invention. From the above discussion, many variations will be apparent to one skilled in the art that would yet be encompassed by the scope of the present invention.
Claims (27)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2024182A NL2024182B1 (en) | 2019-11-07 | 2019-11-07 | Horticultural or agricultural greenhouse |
PCT/NL2020/050627 WO2021091372A1 (en) | 2019-11-07 | 2020-10-13 | Horticultural or agricultural greenhouse |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2024182A NL2024182B1 (en) | 2019-11-07 | 2019-11-07 | Horticultural or agricultural greenhouse |
Publications (1)
Publication Number | Publication Date |
---|---|
NL2024182B1 true NL2024182B1 (en) | 2021-07-20 |
Family
ID=68733578
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL2024182A NL2024182B1 (en) | 2019-11-07 | 2019-11-07 | Horticultural or agricultural greenhouse |
Country Status (1)
Country | Link |
---|---|
NL (1) | NL2024182B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL2032172B1 (en) | 2022-06-15 | 2023-12-21 | Dalsem Beheer B V | Horticultural or agricultural greenhouse |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH480781A (en) * | 1967-07-21 | 1969-11-15 | Gysi Ag Geb | Method for air conditioning a greenhouse and device for carrying out the method |
US4301626A (en) * | 1980-06-09 | 1981-11-24 | Effective Conservation Systems, Inc. | Inflatable heat barrier |
WO2008140312A2 (en) * | 2007-05-15 | 2008-11-20 | Hoogendoorn Automatisering B.V. | System for treating and distributing air in a greenhouse |
EP2941952A2 (en) * | 2014-05-07 | 2015-11-11 | Van Der Ende Pompen B.V. | Greenhouse provided with ventilation system |
-
2019
- 2019-11-07 NL NL2024182A patent/NL2024182B1/en active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH480781A (en) * | 1967-07-21 | 1969-11-15 | Gysi Ag Geb | Method for air conditioning a greenhouse and device for carrying out the method |
US4301626A (en) * | 1980-06-09 | 1981-11-24 | Effective Conservation Systems, Inc. | Inflatable heat barrier |
WO2008140312A2 (en) * | 2007-05-15 | 2008-11-20 | Hoogendoorn Automatisering B.V. | System for treating and distributing air in a greenhouse |
EP2941952A2 (en) * | 2014-05-07 | 2015-11-11 | Van Der Ende Pompen B.V. | Greenhouse provided with ventilation system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL2032172B1 (en) | 2022-06-15 | 2023-12-21 | Dalsem Beheer B V | Horticultural or agricultural greenhouse |
WO2023244102A1 (en) | 2022-06-15 | 2023-12-21 | Dalsem Beheer B.V. | Greenhouse |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11528852B2 (en) | Greenhouse sidewall ventilation system | |
US11412668B2 (en) | Greenhouse and forced greenhouse climate control system and method | |
EP3790379B1 (en) | Horticultural and/or agricultural greenhouse | |
DK2521436T3 (en) | Greenhouses and forced greenhouse climate control | |
KR101729170B1 (en) | A heating and cooling systems of circulation blower type for a greenhouse | |
KR101889217B1 (en) | Air conditioning device for plant cultivation | |
DE10315626A1 (en) | Air conditioner and air conditioning process for plant growing | |
NL2024182B1 (en) | Horticultural or agricultural greenhouse | |
WO2021091372A1 (en) | Horticultural or agricultural greenhouse | |
NL1043187A (en) | A greenhouse with air conduits for climate control | |
EP2941952B1 (en) | Greenhouse provided with ventilation system | |
NL2027656B1 (en) | Greenhouse having an air treatment unit with perforated air tubes | |
EP3747260A1 (en) | Greenhouse provided with ventilation system | |
US20230044520A1 (en) | Optimised greenhouse air treatment chamber, and corresponding greenhouse. | |
NL2027017B1 (en) | A greenhouse | |
NL2027064B1 (en) | Greenhouse with carbon dioxide dosing installation | |
EA044056B1 (en) | GARDEN AND/OR AGRICULTURAL GREENHOUSE | |
DE102013112278B4 (en) | Arrangement for ventilation of stables | |
NL2032172B1 (en) | Horticultural or agricultural greenhouse | |
DE202015009384U1 (en) | Rain cover with integrated heat and moisture exchanger | |
NL1038097C2 (en) | METHOD AND DEVICE FOR IMPACTING THE CLIMATE IN A CASH. | |
MX2007008107A (en) | Greenhouse and forced greenhouse climate control system and method . | |
JP2019054766A (en) | Ventilation structure and plant cultivation facility |