EP0197398A1 — A cooling sprinkling system and a nozzle for use …

Claim 1

Independent Claim 209 words

A cooling sprinkling system for air-moistening, especially for plants, particularly but not exclusively in hothouses and comprising at least one and preferably two or several nozzle pipes (51, 52) situated at a chosen height above the area to be moistened and extending parallel to the boundaries, preferably the long walls (61, 62) of the area, said nozzle pipes comprising nozzles (1) of the kind, wherein water and pressurized air are conveyed through separate passageways (11, 31) to an orifice area - (22, 32), characterised in that the nozzle pipes (51, 52) are placed at a great mutual distance compared to the width of the area or at at least one side of the area, that each nozzle pipe (51, 52) in addition to a tube for pressurized air (53) comprises a hose (56) for sucking up essentially non-pressurized water, and in that the nozzles (1, A, B, C, D) are upwardly inclined, that the water passage duct (31) until the orifice area has the shape of a tube with an essentially constant inner diameter and in the orifice area opens like a funnel or a cone, and that the orifice edge (32) of the core is spaced at or a short distance outside the discharge orifice for pressurized air.

Claim 2

Dependent Claim 209 words

A cooling sprinkling system for air-moistening, especially for plants, particularly but not exclusively in hothouses and comprising at least one and preferably two or several nozzle pipes (51, 52) situated at a chosen height above the area to be moistened and extending parallel to the boundaries, preferably the long walls (61, 62) of the area, said nozzle pipes comprising nozzles (1) of the kind, wherein water and pressurized air are conveyed through separate passageways (11, 31) to an orifice area - (22, 32), characterised in that the nozzle pipes (51, 52) are placed at a great mutual distance compared to the width of the area or at at least one side of the area, that each nozzle pipe (51, 52) in addition to a tube for pressurized air (53) comprises a hose (56) for sucking up essentially non-pressurized water, and in that the nozzles (1, A, B, C, D) are upwardly inclined, that the water passage duct (31) until the orifice area has the shape of a tube with an essentially constant inner diameter and in the orifice area opens like a funnel or a cone, and that the orifice edge (32) of the core is spaced at or a short distance outside the discharge orifice for pressurized air.

Claim 3

Dependent Claim 105 words

A cooling sprinkling system as claimed in claim 1 and comprising two nozzle pipes, characterised in that the nozzle pipes (51, 52) are placed at a mutual distance of more than 10 m, preferably more than 15 m and particularly at a distance of about 20 m or more, and that the nozzles (A, B) on one of the nozzle pipes (51) are placed opposite the center of the cavity between the nozzles (C, D) on the second nozzle pipe (52), that the cavities between the nozzles on each nozzle pipe are not less than about 3 m, and that the nozzles face each other.

Claim 4

Dependent Claim 36 words

A cooling sprinkling system as claimed in claim 1 or 2, characterised in that the axis of the nozzles (A, B, C, D) form an angle of between 5 and 10° relative to the horizontal plane.

Claim 5

Dependent Claim 184 words

A nozzle for a cooling sprinkling system and of the kind where water and pressurized air are conveyed through separate passageways (11, 31) to an orifice area (22, 32) and comprising a pressurized air nozzle head (20) with only one discharge orifice (22) for pressurized air and surrounding a core led through the nozzle head and at a.distance therefrom to form a cavity, characteris ed in that the water passage duct (31) until the orifice area has the shape of a tube with an essentially constant inner diameter and in the orifice area opens like a funnel or a cone, the vertex of which is situated in the water passage duct (31) and on its axis, and that the orifice edge (32) of the core forming the water discharge orifice (32) is placed relative to the discharge orifice for pressurized air in an area limited by a first loca tion a short distance outside the orifice surface of the discharge orifice for pressurized air of the nozzle head (20, Figure 1) and by a second location immediately outside the discharge orifice for pressurized air.

Claim 6

Dependent Claim 184 words

A nozzle for a cooling sprinkling system and of the kind where water and pressurized air are conveyed through separate passageways (11, 31) to an orifice area (22, 32) and comprising a pressurized air nozzle head (20) with only one discharge orifice (22) for pressurized air and surrounding a core led through the nozzle head and at a.distance therefrom to form a cavity, characteris ed in that the water passage duct (31) until the orifice area has the shape of a tube with an essentially constant inner diameter and in the orifice area opens like a funnel or a cone, the vertex of which is situated in the water passage duct (31) and on its axis, and that the orifice edge (32) of the core forming the water discharge orifice (32) is placed relative to the discharge orifice for pressurized air in an area limited by a first loca tion a short distance outside the orifice surface of the discharge orifice for pressurized air of the nozzle head (20, Figure 1) and by a second location immediately outside the discharge orifice for pressurized air.

Claim 7

Dependent Claim 27 words

A nozzle as claimed in claim 4, charactterised in that the conical water discharge orifice of the core (30) ends in a sharp, outer, annular edge (32).

Claim 8

Dependent Claim 217 words

A nozzle as claimed in claim 4 or 5, wherein the core . (30) !in service position is permanently secured relative to the pressurized air nozzle head - (20) and a nozzle body (1) with a through-going hole (11) for conveying pressurized air in such a manner that the nozzle is adapted to a specific area with regard to the plants to be grown there as well as to the width of the area, characterised- in that the core (30) comprising a water feed tube - (40) fixedly situated therein and connected to the water passage duct (31) initially is mounted non- rotatably, but axially displaceably in the through-going hole of the nozzle body (1), that a radial, axially oblong bore (5) is provided in the wall of the nozzle body (1), that the core is displaced axially in the hole (11) between an upper location and a lower location by the water feed tube (40) firmly connected to the core (30) being displaced in the axially oblong bore (5) until the desired location has been found, that the water feed tube (40) and thus the core (30) after adjustment of the location of the water discharge orifice are fixed relative to the discharge orifice for pressurized air in the chosen position by friction, welding or adhesion.

Claim 9

Dependent Claim 71 words

A nozzle as claimed in one or several of the preceding claims 4-6, characterised in that the axially oblong bore (5) and the core (30) are of such a length that the water discharge orifice by the displacement of the core are displaceable from a very short distance outside the discharge orifice for pressurized air (22) to about 5, and preferably about 2 mm outside the discharge orifice for pressurized air.

Claim 10

Dependent Claim 55 words

A nozzle as claimed in one or several of the preceding claims 4 to 7, characterisedin that the core (30) within the cavity (21) of the nozzle head - (20) on its outside has the shape of a cone, and at the area opposite the orifices on its outside has the shape of an hourglass.

Claim 11

Dependent Claim 79 words

9; A nozzle as claimed in one or several of the preceding claims 4-8, wherein the core (30) is adapted for a guided insertion into the through-going axial hole (11) of the nozzle body (1) and for forming flow paths for the pressurized air, charc- terised in that the core seen in cross-section forms passage ducts for the pressurized air and comprises contact faces (35, 36) abutting the cylindrical wall of the hole (11) of the nozzle body (1).

Claim 12

Dependent Claim 61 words

A nozzle as claimed in one or several of the preceding claims 4-9, characterised in that of its individual parts, namely the nozzle body (1), the nozzle head (20) mounted thereon, the core (30) placed therein and the feed tube (40) are at least the nozzle head (20) and the core (30) made of an electrially non-conductive material, especially hard plastics.

A cooling sprinkling system and a nozzle for use in the cooling sprinkling system

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