EP4322737A1

EP4322737A1 - Greenhouse

Info

Publication number: EP4322737A1
Application number: EP22718822.4A
Authority: EP
Inventors: Niels Sander GROEN; Ruud BROUWER
Original assignee: Beheer 141 BV
Current assignee: Beheer 141 BV
Priority date: 2021-04-16
Filing date: 2022-04-14
Publication date: 2024-02-21
Also published as: WO2022220684A1; NL2027988B1

Abstract

The invention concerns a greenhouse (100) comprising a cultivation system for cultivating crops therein, and an air circulation system having a fan device (20) and an air distribution hose (10) which is in fluid connection with the fan device (20) and is configured to distribute air to be supplied by the fan device (20) over the crops to be cultivated in the cultivation system, wherein the air distribution hose is formed by at least two air channels (11) which are mutually separated over the length of the air distribution hose, and which lie adjacently of each other and are each configured to distribute air to be supplied by the fan device (20) over the crops to be cultivated in the cultivation system.

Description

Greenhouse

The present invention relates to a greenhouse. The present invention relates specifically to a greenhouse comprising a cultivation system for cultivating crops therein, and an air circulation system comprising a fan device, and an air distribution hose which is in fluid connection with the fan device and is configured to distribute air to be supplied by the fan device over the crops to be cultivated in the cultivation system.

It is known that a good air circulation in a greenhouse is of essential importance for the growth and quality of the crops cultivated in a greenhouse. For cultivating crops in a greenhouse use is usually made of a system of a cultivation gutter and an air distribution hose arranged under the cultivation gutter and having the same length as the length of the cultivation gutter. In this air distribution hose holes are arranged over the whole length thereof for the purpose of blowing air therethrough, so that all crops in the cultivation gutter are exposed to moving air.

It has however been found that with this system the air circulation around the crops in the cultivation gutter usually leaves something to be desired. The system furthermore forms a limiting factor in the efficient use of the surface area available for cultivation in the greenhouse.

It is an object of the present invention to provide a greenhouse which at least partially obviates one or more of the above stated drawbacks.

For this purpose the present invention provides a greenhouse of the type stated in the preamble, with the special feature that the air distribution hose is formed by at least two air channels which are mutually separated over the length of the air distribution hose, and which lie adjacently of each other and are each configured to distribute air to be supplied by the fan device over the crops to be cultivated in the cultivation system. For the sake of completeness it is noted that mutually separated is understood to mean that the air channels are not in fluid connection with each other. As a result, air is prevented from flowing from the one air channel to the other air channel. Each of the air channels is therefore configured to distribute the air over the crops to be cultivated in the cultivation system separately from the other of the air channels. Each of the air channels preferably comprises a plurality of outlet openings for distributing the air over the crops to be cultivated in the cultivation system.

The separation of the air distribution hose into at least two mutually adjacent air channels provides a plurality of particular advantages. Firstly, the separation into a plurality of air channels provides for the option of carrying a plurality of airflows with mutually differing air conditions through the air distribution hose. It is for instance possible to guide both a hot and a cold airflow to the crops to be cultivated and distribute them thereover using an air distribution hose.

The separation into a plurality of air channels moreover allows the shape of the outer contour of the air distribution hose, as seen in cross-sectional view, to be adapted to the application of the air distribution hose in the greenhouse. Since the outer surface of the air distribution hose forms the boundary surface between the airflows in the air channels and the area surrounding the crops to be cultivated in the cultivation system, the outer contour determines where on said boundary surface the air can be supplied to the crops by the air distribution hose. In this way the shape of the outer contour of the air distribution hose can therefore be chosen such that the air hose supplies the air to be supplied by the fan device at locations that are more favourable for crop growth than is achieved with conventional air distribution hoses.

It is noted in this respect that conventional air hoses are generally cylindrical. A division into for instance two mutually adjacent cylindrical air channels enables an air hose which, as seen in cross-sectional view, is twice as wide as it is high or vice versa, without the throughflow area, i.e. the overall surface area of the cross-sectional area of the interior of the air distribution hose, being reduced. Such an air hose divided into a plurality of air channels is furthermore non-rotation- symmetrical about its longitudinal axis. Rotation about its longitudinal axis therefore enables the air distribution hose to be oriented optimally relative to the crops present in the cultivation system. In the case of a plurality of air channels adjacently of each other (or one above the other) the air distribution hose obtains as it were the form of a mattress instead of a cylinder. It is noted for the sake of completeness that lying adjacently of each other is also understood to mean lying one above the other or lying obliquely adjacently or above each other. This depends on the position in which the air distribution hose is rotated about its longitudinal axis.

An air distribution hose in mattress form, consisting of a horizontal row of air channels, can preferably be placed under a cultivation table, wherein an overall width of a row of air channels, as seen in cross-sectional view, corresponds substantially with a width of the cultivation table. Such an air distribution hose has the advantage relative to a conventional cylindrical air distribution hose that the cultivation table can be placed lower in the greenhouse so that the height of the greenhouse can be utilized better. More air is in particular situated above the crops, which enhances the air circulation in the greenhouse. Such a lowered cultivation system, such as a lowered cultivation table or lowered cultivation gutter, also has the advantage that fruits of the crops can for instance be picked more easily, for instance because a ladder need no longer be used. Such a distribution hose under the cultivation table moreover has the advantage that air can be supplied upward to the roots of the crops to be cultivated in the cultivation table over the whole width of the cultivation table, as seen in cross-sectional view. Because the air distribution hose extends in axial direction of the hose, the air can furthermore also be distributed over the whole length of the cultivation table.

Such an air hose can additionally be oriented vertically and be arranged between crops to be cultivated in the cultivation system. This has multiple advantages.

Firstly, the air distribute hose can in this way be placed closer to the crops than is possible with conventional cylindrical air distribution hoses, since the vertically oriented mattress-like air distribution hose extends less far in the width direction, as seen in a cross-sectional view, than the conventional cylindrical distribution hose, while the overall surface area of the throughflow area of the air channels of the mattress-like air distribution hose need not be smaller than that of the conventional cylindrical air distribution hose. In other words, a conventional cylindrical air distribution hose with a throughflow area equal to that of a mattress-like air distribution hose is wider and can therefore not be placed between the crops. A placing of the air distribution hose closer to the crops allows, among other things, a lower flow rate of the air to be supplied to the crops without having an adverse effect on the degree of air circulation, which is advantageous for the crop growth and the quality of the crops to be cultivated.

Such an air hose between the crops to be cultivated in the cultivation system furthermore allows a plurality of airflows with mutually differing air conditions, particularly with mutually differing temperatures, to be carried through the air distribution hose so that air with different temperatures is supplied at different heights. Using the air distribution hose it is thus for instance possible to supply hot air to a lower portion of a crop while cold air is supplied to an upper portion of the crop. This is particularly advantageous for determined types of crop.

An additional advantage is that such a mattress-like vertically oriented air distribution hose between the crops has a space-saving effect. In other words, the assembly of cultivation system, air distribution hose and crops extends less far in the width direction than conventional assemblies, wherein large cylindrical air hoses are generally arranged under cultivation gutters, which air hoses are wider, as seen in cross-sectional view, than the cultivation gutters and the crops arranged therein. Mutually adjacent cultivation systems, such as cultivation gutters, can hereby be placed closer together without intermediate walkways being narrowed by the air hoses.

Finally, such a mattress-like vertically oriented air distribution hose allows the cultivation system, such as a cultivation table or a cultivation gutter, to be placed on the floor of the greenhouse and/or the crops to be placed in the open ground, since air circulation from below is in this way no longer necessary. Just as the above described lowered cultivation system, cultivation systems placed on the floor of the greenhouse have the advantage that the height of the greenhouse can be utilized better. More air is in particular situated above the crops, which enhances the air circulation in the greenhouse. A cultivation system placed on the floor also has the advantage that fruits of the crops can for instance be picked more easily, for instance because a ladder need no longer be used. The air distribution hose consisting of a vertical row of air channels therefore enables the cultivation in greenhouses to be brought closer to the ground or even to take place in the open ground. The air distribution hose according to the present invention enables cultivation adjacently of or to a position below the air distribution hose, while current systems necessitate cultivation above the air distribution hose.

It is noted in this respect that cultivation system is understood to mean any provision in a greenhouse in which the crops are cultivated, such as a cultivation tray, a cultivation table, a cultivation gutter and a cultivated strip in the greenhouse, wherein the crops are cultivated in the open ground, and the like.

Both the horizontally oriented mattress-like air distribution hose under the cultivation table and the vertically oriented mattress-like air distribution hose between the crops provide more control over the air distribution over the crops than a conventional cylindrical air distribution hose placed under cultivation gutters because, as stated, the shape of the outer contour and the associated outer surface can be adapted to the cultivation system and/or the crops to be cultivated therein.

An air distribution hose divided into a plurality of air channels also allows a configuration wherein the air channels form a two-dimensional series, for instance a 2x2 or a 3x3 series. An air distribution hose with such a configuration of air channels enables a substantially rectangular outer contour. Such an air distribution hose is for instance suitable for use under a cultivation gutter and has the particular advantage that it does not protrude outside the cultivation gutter, so that mutually adjacent cultivation gutters can be placed closer together without intermediate walkways being narrowed. Less space is in this way taken up by the air distribution hose, and more space can therefore be utilized in the greenhouse for cultivating the crops.

It is otherwise noted that the air channels of the air distribution hose can be mutually connected via their outer surfaces, but can also lie clear of each other. The air distribution hose is then formed by a group of separate air channels which together are associated with said cultivation system.

In a preferred embodiment, as seen in cross-sectional view, mutually adjacent air channels of the at least two air channels share an outer channel wall and the mutually adjacent air channels are mutually separated by an inner wall lying between the air channels. Because the outer channel wall is shared by the mutually adjacent air channels, the separation of the air distribution hose into the at least two air channels has at most a limited influence on the shape of the outer contour of the air distribution hose, as seen in cross-sectional view.

In a further preferred embodiment the dimension of the inner wall is equal, as seen in cross-sectional view, to the overall dimension of each of the mutually adjacent air channels in an extending direction of the inner wall. This entails that the shape of the outer contour of the air distribution hose does not change due to the separation of the air distribution hose into the at least two air channels.

In another preferred embodiment the dimension of the inner wall is smaller, as seen in cross-sectional view, than the overall dimension of each of the mutually adjacent air channels in an extending direction of the inner wall. The shape of the outer contour of the air distribution hose is hereby changed relative to the same air distribution hose without inner wall.

In another preferred embodiment each of the at least two air channels has its own channel wall which, as seen in cross-sectional view, forms a closed loop around its respective channel. This has the particular advantage that a contact surface between the air distribution hoses is minimized so that heat transfer between the air distribution hoses is also minimized.

In a further preferred embodiment the channel walls of the air channels of each of the at least two air channels are mutually connected with their outer surfaces. This has the particular advantage that the air hose forms one whole, even if each of the at least two air channels has its own channel wall which forms a closed loop around its respective channel. An air distribution hose is therefore provided which consists of a plurality of air channels between which heat transfer is minimized, without each channel having to be supported individually in order to hold the whole air distribution hose in place relative to the cultivation system and/or the crops.

In a preferred embodiment the at least two air channels are configured as at least one row of mutually separated air channels lying adjacently of each other. Such a row of mutually adjacent, mutually separated air channels can for instance be arranged under a cultivation table, wherein the row extends in horizontal direction. Such a configuration makes it possible to ensure that the air distribution hose does not extend outside the table, and also makes it possible to provide the crops in the cultivation table with air circulation over the whole width and length thereof. Such a row can alternatively for instance be arranged between crops which grow upward, wherein the row extends in vertical direction. Such a configuration allows the air to be supplied by the fan device to be supplied closer to the crops. Such a configuration also allows air of different temperatures to be supplied at different heights between the crops. This configuration moreover saves space and the configuration enables crops to be cultivated in open ground since the air distribution hose is situated above the cultivation system instead of under the cultivation system, as is the case in a conventional assembly of cultivation system and air hose.

In a further preferred embodiment the at least one row comprises two or more rows, lying one above the other, of mutually adjacent, mutually separated air channels.

In a further preferred embodiment the two or more rows lying one above the other comprise a two-dimensional series of mutually separated air channels. Such a configuration allows cultivation gutters in a greenhouse to be placed closer together, since the width of the air distribution hose can be adapted to the width of the cultivation gutter, as seen in cross-sectional view. This is because an air distribution hose with a configuration of air channels in for instance a 2x2 or 3x3 series enables a substantially rectangular outer contour. This has the particular advantage that it does not protrude outside the cultivation gutter, so that mutually adjacent cultivation gutters can be placed closer together without intermediate walkways being narrowed. In this way less space is taken up by the air distribution hose, and more space can therefore be utilized in the greenhouse for cultivating the crops.

In a preferred embodiment each of the at least two air channels are manufactured from a flexible material. Air channels manufactured from a flexible material have the advantage that they can be adapted to the form of the cultivation system and that they can be made compact for transport.

In a preferred embodiment the flexible material has material properties such that each of the at least two air channels takes on its shape by blowing air into the respective channel. A particular advantage of inflatable air channels is that the air distribution hose can be flattened and/or folded when it is not in use, which is particularly advantageous for transport and storage of the air distribution hose.

In a preferred embodiment each of the at least two air channels comprises blow-out openings for blowing out therethrough the air to be supplied by the fan device, and the respective blow-out openings of each of the at least two air channels are distributed over the length of the respective air channel such that the air to be supplied by the fan device is distributed via the blow out openings over the crops to be cultivated in the cultivation system.

In a preferred embodiment the cultivation system is arranged suspended in the greenhouse, the air distribution hose is arranged under the cultivation system and the blow-out openings of the at least two air channels are positioned such that the air to be supplied by the fan device is blown out in mutually opposite lateral radial directions.

In a preferred embodiment the blow-out openings of at least an upper channel of the at least two air channels are positioned such, as seen in cross-sectional view, that the air to be supplied by the fan device is blown out in an upward direction. In this way the roots of the crops to be cultivated in the cultivation system can be aerated from below. A bottom of the cultivation system is preferably provided for this purpose with air-transmitting openings.

In a preferred embodiment the at least two air channels are configured as at least one row of mutually separated air channels lying one above the other, wherein the at least one row is arranged above the cultivation system such that the at least one row is situated between the crops to be cultivated in the cultivation system, wherein the blow-out openings of the air channels of the at least one row are positioned such that the air to be supplied by the fan device is blown out in mutually opposite lateral radial directions. Such a configuration has the above stated particular advantages in respect of the vertically oriented mattress-like air distribution hose between the crops.

In a preferred embodiment the air distribution hose is manufactured from a fluid-tight material and perforations serving as blow-out openings are arranged in the fluid-tight material.

In another preferred embodiment the air distribution hose is manufactured from a woven textile and pores in the woven textile serve as the blow-out openings.

In a preferred embodiment the fan device and the air distribution hose are configured such that the fan device makes an airflow flow in each of the at least two air channels, and the greenhouse further comprises an air treatment system for treating the air to be supplied by the fan device, wherein the air treatment system is configured to treat the air of a first airflow in a first of the at least two air channels and the air of a second airflow in a second of the at least two air channels in mutually differing ways, such that a property of the air of each of the first and the second airflow mutually differs.

In a preferred embodiment a property of the air comprises at least one of a temperature, a relative humidity and a flow rate of the air. A particular advantage hereof is that mutually differing parts of the crops in the cultivation system can be treated with air with mutually differing properties, such as a different temperature, a different relative humidity and/or a different flow rate. This is particularly advantageous for enhancing the growth and for the quality of the crops to be cultivated in the cultivation system.

The present invention will be further elucidated with reference to the following figures, which show preferred embodiments of the greenhouse according to the present invention and are not intended to limit the scope of protection of the invention in any way, wherein: figure 1 is a cross-sectional front view of a preferred embodiment of the greenhouse according to the present invention; figures 2A and 2B show cross-sectional front views at two different lengthwise positions of a portion of the greenhouse of figure 1 ; figure 3A is a cross-sectional front view of an assembly of a cultivation system, crops and an air distribution hose according to the prior art; figure 3B is a cross-sectional front view of an assembly of a cultivation system, crops and an air distribution hose according to a preferred embodiment of the greenhouse according to the present invention; figure 4 is a cross-sectional front view of a vertically oriented air distribution hose disposed between the crops; figure 5 is a cross-sectional front view of an air distribution hose disposed horizontally under the crops; figure 6A is a perspective view of a segment of an air distribution hose of a preferred embodiment according to the present invention; figure 6B is a cross-sectional front view of an alternative air distribution hose of a preferred embodiment according to the present invention; and figure 7 is a schematic longitudinal side view of an air circulation system at an end surface of a preferred embodiment of the greenhouse according to the present invention.

Figure 1 shows a greenhouse 100 for plants 200 which are cultivated in rows 110 in cultivation gutters 111. It is likewise possible to cultivate the plants 200 in rows 110 in the soil 300 of the greenhouse 100, as shown in Figure 4. Greenhouse 100 is provided with an air displacement system 1 which is shown schematically in more detail in Figure 7. The air displacement system 1 is configured to draw air in from outside greenhouse 100 on a side of greenhouse 100 (airflows in the figures are indicated with arrows L). Alternatively, air can be drawn in from inside greenhouse 100 so as to realize a (closed) circulation of air inside greenhouse 100. The drawn -in air reaches a first air chamber 40 of system 1, from where the air can be guided through a fan device 20 with turbines 21a, 21b, which are configured to blow the drawn-in air through a plurality of air channels 11 of an air distribution hose 10. Before the air driven by fans 21a, 21b flows into air channels 11 the air can for instance be treated in a second air chamber 30, downstream of fan 20, or in a plurality of separate compartments (not shown). The air can thus for instance be brought to a predetermined temperature and/or humidity. For this purpose the system 1 preferably comprises a heating and/or cooling system and/or an air humidifier, provided in first air chamber 40 or, preferably, in second air chamber 30. The air flow rate through each of the air channels 11 is likewise adjustable by means of valves in the air displacement system 1 on an inlet side of air distribution hose 10 or by means of the control of fan device 20. The plurality of air channels 11 for the one strip 110 can be mutually connected or lie clear of each other, as shown in Figure 7. By way of example, a plurality of air channels 11 of air distribution hose 10 which lie clear of each other are then associated with the same planted strip 110.

As shown in Figure 2 A, each turbine 21a, 21b can bring about an airflow in a plurality of air channels 1 la, 1 lb in order to guide the air via the air distribution hose 10 to two or more rows 110 of plants 200, as shown in Figure 2B. The air distribution hose 10 shown in Figures 2A and 2B is configured to guide the air from turbines 21a, 21b to and in between the plants 200 in greenhouse 100. A plurality of air channels 1 la, 1 lb placed one above the other are provided per strip 110 of plants 200 in order to guide the air through this one planted strip 110 between plants 200. Because air channels 1 la, 1 lb are placed one above the other, space can on the one hand be saved in the horizontal direction, which enables the plants 200 and/or the rows 110 to be disposed closer together. On the other hand, the stacked air channels 11a, lib ensure that the air close to the plants 200 can be treated separately for each respective height.

Figure 6A shows in more detail a segment of the air distribution hose 10. In the vicinity of plants 200 in a strip 110 the air distribution hose 10 can be provided in a wall 14 of air distribution hose 10 with air holes 13 for supplying the air flowing through air distribution hose 10 to the plants 200. The air holes 13 are preferably distributed over the length of air distribution hose 10 to provide plants 200 with air from the air displacement system 1 over the whole length of strip 110. Air holes 13 are likewise preferably distributed over at least a part of the periphery of air distribution hose 10 in order to enable supply of air all around the air distribution hose 10. In Figure 6A the air holes 13 are thus orientated such that air can be blown out on either side of both the upper channel 1 la and the lower channel 1 lb.

The air distribution hose 10 shown in Figure 6A is provided with two air channels 1 la, 1 lb separated by a preferably airtight and insulating intermediate member 12 for separating airflows through the air channels 1 la, 1 lb from each other. In order to further minimize the influence of the airflows on each other the air distribution hose 10 is narrowed or, as in Figure 6B, pinched, at the position of separating member 12 over the length thereof.

In order to be able to guide air closer to the plants 200 through air channels 11 in the situation shown in Figure 4 the air distribution hose 10 for a single planted strip 110 is configured between plants 200 of that strip 110 or, as in Figure 5, under plants 200. Instead of a tube being disposed between and parallel to two strips, in Figures 4 and 5 the air distribution hose 10 is placed in the plant row 110 to thus be able to guide airflows closer to the plants 200 through air channels 11. Figure 5 shows that the air from the air channels can be supplied to the plants 200 by means of for instance the air holes 13 shown in Figure 6A. In that case the cultivation gutter or table 111 for cultivation of plants 200, under which the air distribution hose 10 is arranged, is preferably permeable in order to guide the supplied air through table 111 to plants 200. Because air channels 11 can be configured relatively close to plants 200, the air in direct contact with plants 200 can be treated more accurately. The fact that the air distribution hoses 10 each form more than two air channels 11 in Figures 4 and 5 further contributes to the ability to treat the air more accurately depending on a position, such as the height in Figure 4 and the horizontal position in the case of Figure 5.

Figure 3B shows for a cultivated strip 110 a compact air distribution hose 10 with a plurality of air channels 11 which are placed adjacently of each other and one above the other and which form a relatively large throughflow area without taking up a great deal of space in the width direction. It is thereby for instance possible to arrange the air distribution hose 10 under a cultivation gutter or table 111 with flowers 200 or other plants in a manner such that the air distribution hose 10 protrudes relative to cultivation gutter 111 in the width direction to lesser extent compared to a tube with a round periphery as shown in Figure 3 A. Referring to Figure 1, the rows 110 for crops 200 can thus be placed closer together without narrowing the walkways between the rows 110. The plurality of air channels 11 likewise enables the air close to the plants to be treated with great accuracy (relative to the tube in Figure 3A) owing to the separate airflows through air channels 11, since the airflow can be controlled individually for each channel 11.

The present invention is not limited to the shown embodiments but also extends to other embodiments falling within the scope of protection of the appended claims.

Claims

1. Greenhouse, comprising: a cultivation system for cultivating crops therein; and an air circulation system, comprising: a fan device; and an air distribution hose which is in fluid connection with the fan device and is configured to distribute air to be supplied by the fan device over the crops to be cultivated in the cultivation system, characterized in that the air distribution hose is formed by at least two air channels which are mutually separated over the length of the air distribution hose, and which lie adjacently of each other and are each configured to distribute air to be supplied by the fan device over the crops to be cultivated in the cultivation system.

2. Greenhouse according to claim 1, wherein, as seen in cross-sectional view, mutually adjacent air channels of the at least two air channels share an outer channel wall and are mutually separated by an inner wall lying between the air channels.

3. Greenhouse according to claim 2, wherein, as seen in cross-sectional view, the dimension of the inner wall is equal to the overall dimension of each of the mutually adjacent air channels in an extending direction of the inner wall.

4. Greenhouse according to claim 2, wherein, as seen in cross-sectional view, the dimension of the inner wall is smaller than the overall dimension of each of the mutually adjacent air channels in an extending direction of the inner wall.

5. Greenhouse according to claim 1, wherein each of the at least two air channels has its own channel wall which, as seen in cross-sectional view, forms a closed loop around its respective channel.

6. Greenhouse according to claim 5, wherein the channel walls of the air channels of each of the at least two air channels are mutually connected with their outer surfaces.

7. Greenhouse according to any one of the claims 1-6, wherein the at least two air channels are configured as at least one row of mutually separated air channels lying adjacently of each other.

8. Greenhouse according to claim 7, wherein the at least one row comprises two or more rows, lying one above the other, of mutually adjacent, mutually separated air channels.

9. Greenhouse according to claim 8, wherein the two or more rows lying one above the other comprise a two-dimensional series of mutually separated air channels.

10. Greenhouse according to any one of the claims 1-9, wherein each of the at least two air channels are manufactured from a flexible material.

11. Greenhouse according to claim 10, wherein the flexible material has material properties such that each of the at least two air channels takes on its shape by blowing air into the respective channel.

12. Greenhouse according to any one of the foregoing claims, wherein each of the at least two air channels comprises blow-out openings for blowing out therethrough the air to be supplied by the fan device, wherein the respective blow-out openings of each of the at least two air channels are distributed over the length of the respective air channel such that the air to be supplied by the fan device is distributed via the blow-out openings over the crops to be cultivated in the cultivation system.

13. Greenhouse according to claim 12, wherein the cultivation system is arranged suspended in the greenhouse, wherein the air distribution hose is arranged under the cultivation system and wherein the blow-out openings of the at least two air channels are positioned such that the air to be supplied by the fan device is blown out in mutually opposite lateral radial directions.

14. Greenhouse according to claim 12 or 13, wherein, as seen in cross-sectional view, the blow-out openings of at least an upper channel of the at least two air channels are positioned such that the air to be supplied by the fan device is blown out in an upward direction.

15. Greenhouse according to claim 12, wherein the at least two air channels are configured as at least one row of mutually separated air channels lying one above the other, wherein the at least one row is arranged above the cultivation system such that the at least one row is situated between the crops to be cultivated in the cultivation system, wherein the blow-out openings of the air channels of the at least one row are positioned such that the air to be supplied by the fan device is blown out in mutually opposite lateral radial directions.

16. Greenhouse according to any one of the claims 1-15, wherein the air distribution hose is manufactured from a fluid-tight material and wherein perforations serving as the blow-out openings are arranged in the fluid-tight material.

17. Greenhouse according to any one of the claims 1-15, wherein the air distribution hose is manufactured from a woven textile and wherein pores in the woven textile serve as the blow-out openings.

18. Greenhouse according to any one of the foregoing claims, wherein the fan device and the air distribution hose are configured such that the fan device makes an airflow flow in each of the at least two air channels, and wherein the greenhouse further comprises an air treatment system for treating the air to be supplied by the fan device, wherein the air treatment system is configured to treat the air of a first airflow in a first of the at least two air channels and the air of a second airflow in a second of the at least two air channels in mutually differing ways, such that a property of the air of each of the first and the second airflow mutually differs.

19. Greenhouse according to claim 18, wherein a property of the air comprises at least one of a temperature, a relative humidity and a flow rate of the air.