Nozzle device for a recirculation system of a cold room and cold room

Abstract

Nozzle device (50) for a recirculation system of a cold room (1), comprising at least one elongated air duct element (52) with a polygonal cross-sectional contour and several or a plurality of nozzle pipes (53) which are designed as pipe bends and are arranged within the air duct element (52) and open with a pipe end (53.1) into associated outlet openings (54) of the air duct element (52), wherein the outlet openings (54) are arranged on a same longitudinal side (55) of the air duct element (52), characterized in that in the direction of the longitudinal extent of the air duct element (52) the outlet openings (54) are spaced apart from one another on a line (56) deviating from a straight line.

Description

[0001] The present disclosure relates to a nozzle device for a recirculation system of a cold room and in particular to a cold room having such a nozzle device.

[0002] A nozzle device of the type discussed here is known from DE 10 2021 108 431 A1, to which reference is hereby made for the purpose of completing and supplementing the present disclosure, with the note that the document may assign a meaning to identical terms that differs from the present meaning. The known nozzle device is installed in a cold storage room and is a component of a recirculation system. The recirculation system circulates the cool or cooled air contained in the cold storage room.

[0003] The known nozzle device enables the formation of a targeted air flow along a goods removal opening of the refrigerated chamber. For this purpose, the known nozzle device comprises an air duct with nozzle tubes arranged circumferentially thereon, which are arranged one behind the other in the longitudinal direction of the air duct. The air duct is formed by a U-shaped sheet metal duct. Openings are provided on the circumferential side of the sheet metal duct, into which the nozzle tubes are inserted.

[0004] In the course of continuous development, there is a need to optimize the existing nozzle device.

[0005] Against this background, a nozzle device for a recirculation system of a cold room is proposed, which comprises at least one preferably elongated air duct element with a polygonal cross-sectional contour and has several or a plurality of nozzle tubes, which are preferably designed as pipe bends and are preferably arranged at least partially within the air duct element and open with a pipe end and / or via a pipe end into associated outlet openings of the air duct element. For example, the outlet openings are arranged on the same longitudinal side of the air duct element.

[0006] In the present disclosure, the term "air duct element" refers in particular to a preferably elongated structure suitable for conducting air or other gaseous substances. The air duct element can be a component of an air duct formed from several interconnected air duct elements. In the present disclosure, the term "air" is to be understood as synonymous with any gaseous substance.

[0007] In the present disclosure, the term "nozzle tube" refers in particular to a tube with a cross-sectional area, for example at the outlet or exit, that is smaller than the cross-sectional area of the air duct. This allows a higher flow velocity to be achieved in the nozzle tube than in the air duct element. The air can therefore be blown out of the nozzle tube at a higher flow velocity.

[0008] In the present disclosure, the term “longitudinal side” is to be understood in particular as a surface with a longitudinal extension which is bounded transversely, in particular orthogonally to the longitudinal extension, by a dividing line, such as an edge, in particular is bounded on both sides by a dividing line, such as an edge.

[0009] In the present disclosure, the term "longitudinal side of the air duct element" refers in particular to a side surface of the at least one air duct element that has a longitudinal extension and is bounded transversely, in particular orthogonally thereto, by an edge on both sides. In the present disclosure, the term "same longitudinal side" refers to the one longitudinal side of the at least one air duct element on which the outlet openings, in particular the outlet openings under consideration, are arranged.

[0010] Fundamental improvements are offered by an embodiment in which the outlet openings are spaced apart from one another in the direction of the longitudinal extension of the air duct element on a line that deviates from a straight line. In particular, the outlet openings lie with their central axis on a line that deviates from a straight line. This favors an arrangement of the nozzle tubes in such a way that mutual obstruction of adjacent nozzle tubes in the region of their flow inlet is counteracted. It has been found that this is a structural measure that favors achieving a uniform outlet velocity at the outlet openings, for example, when the nozzle device is used in a recirculation system of a cold storage room known from DE 10 2021 108 431 A1.

[0011] The improved nozzle device can be designed such that the line with the outlet openings located thereon has a curve. Additionally or alternatively, the improved nozzle device can be designed such that the line with the outlet openings located thereon has a kink. In both cases, mutual interference between adjacent nozzle tubes in the region of their flow inlet can be effectively counteracted.

[0012] In the present disclosure, the term “curvature” is to be understood in particular as a course of the line in which the line has a vertex and a flank section leading to the vertex and / or a flank section leading away from the vertex.

[0013] In the present disclosure, the term “kink” is to be understood in particular as a course of the line in which the line has a kink and a flank section leading to the kink and / or a flank section leading away from the kink.

[0014] The improved nozzle device can be designed such that several or a plurality of outlet openings are assigned to at least one flank section of the line, in particular are arranged in the region of one flank section. If the line with the outlet openings located thereon has a curve, the flank section can be a flank section that leads toward the apex of the curve or away from the apex of the curve. If the line with the outlet openings located thereon has a bend, the flank section can be a flank section that leads toward the bend or away from the bend.

[0015] For example, the improved nozzle device can be designed such that the line with the outlet openings located thereon runs toward the opposite longitudinal ends of the air duct element in the direction of a same longitudinal edge of one longitudinal side of the air duct element. For example, the improved nozzle device can further be designed such that the line with the outlet openings located thereon runs once, i.e., only once, toward a longitudinal edge of one longitudinal side of the air duct element, in particular an opposite longitudinal edge.

[0016] Further improvements are offered, either additionally or alternatively, by an embodiment in which at least one or more of the nozzle tubes are aligned with their other tube end such that, between the longitudinal edges of one longitudinal side of the air duct element, the tube axis of the other tube end runs transversely to the longitudinal axis of the air duct element. This measure also aims to counteract mutual obstruction of adjacent nozzle tubes in the region of their flow inlet. It has been found that this measure also promotes achieving a uniform outlet velocity at the outlet openings, for example, when the nozzle device is used in a recirculation system of a cold storage room known from DE 10 2021 108 431 A1.

[0017] The further improved nozzle device can be designed such that the air duct element has an air supply opening on a longitudinal side adjacent to one longitudinal side, and the other end of the individual or multiple nozzle tubes points toward the air supply opening. It has been found that achieving an equal outlet velocity at the outlet openings is facilitated if the individual or multiple nozzle tubes have such an orientation relative to the air supply opening.

[0018] The further improved nozzle device can further be designed such that at least one or more of the nozzle tubes are aligned with their other tube end such that, between the longitudinal edges of one longitudinal side of the air duct element, the tube axis of the other tube end runs in the direction of the longitudinal axis of the air duct element. In this case, the air duct element can have an air supply opening on a transverse side, for example, instead of the air supply opening on the adjacent longitudinal side, wherein the other tube end of the one or more nozzle tubes is then arranged in an inlet area of the air duct element adjacent to the air supply opening.

[0019] Further improvements are additionally or alternatively offered by an embodiment in which at least one wall of the air duct element has or is formed from a hollow chamber structure. This counteracts undesirable condensation formation, for example when an access door to the cooling chamber is opened with the nozzle device installed, thereby causing the air duct element to come into contact with warm ambient air. The hollow chamber structure improves thermal insulation, as air contained in the chambers of the hollow chamber serves as thermal insulation and thus offers improved protection for the air flow flowing through the air duct element from the warm ambient air. At the same time, the hollow chamber structure offers an advantage in terms of cost and / or weight, for example compared to an air duct element made of sheet metal.

[0020] The further improved nozzle device can be designed such that the hollow chamber structure has a plurality of elongated hollow chambers, of which adjacent hollow chambers are separated from each other by an elongated web whose longitudinal extension runs transversely, in particular orthogonally, to the longitudinal extension of the air duct element. This promotes stiffening or reinforcement of the air duct element, for example, to counteract bending transversely to the longitudinal extension of the air duct element.

[0021] The further improved nozzle device can further be designed such that the hollow chamber structure comprises or consists of a plastic material. The plastic material can be polycarbonate. This facilitates the lightweight realization of the air duct element.

[0022] The further improved nozzle device can further be designed such that the hollow chamber structure is a hollow chamber plate. In the present disclosure, the term "hollow chamber plate" refers in particular to a plate comprising two plates arranged at a distance from one another, which are connected to one another via webs or other separating elements or partition walls. The webs or separating elements or partition walls are in turn arranged at a distance from one another and, together with the two plates, form hollow chambers. The term "hollow chamber plate" is therefore also understood as a synonym for the terms "web plate" or "double web plate."

[0023] The use of a hollow-core panel as a hollow-core structure offers the advantage of being able to use a commercially available product that is used, for example, in house construction, for roofing.

[0024] The further improved nozzle device can further be designed such that two adjacent walls of the air duct element have the hollow chamber structure and are connected, in particular connected to each other, via a connecting profile. In particular, the connecting profile has two U-shaped receptacles. For example, the connecting profile is configured such that the legs of one receptacle are transverse, in particular orthogonal, to the legs of the other receptacle. This facilitates simple assembly of the two adjacent walls.

[0025] In order to achieve a stable connection, it is advisable for the connecting profile to be a plastic profile or a metal profile, such as an aluminum profile, in particular to consist of such a material or to have such a material.

[0026] According to one aspect, a cold storage room is proposed. Preferably, the cold storage room is suitable for, or serves to cool, food, beverages, or other goods, in particular refrigerated goods. The cold storage room is also suitable for installation in a sales area. In particular, the cold storage room is suitable for installation on a floor area, for example, in a supermarket or a gas station. In principle, the cold storage room can be walk-in. A non-walk-in design is also possible.

[0027] In particular, the cooling chamber has a bottom, a top, a front, a back, and two opposing outer sides. In particular, the bottom, top, front, and back extend in the direction of a spatial axis, in particular a common spatial axis. In particular, the outer sides each run perpendicular to the spatial axis.

[0028] In particular, the cold storage room has a shelving system. For example, the shelving system is a product display shelf or has a product display shelf. In particular, the shelving system is arranged within the cold storage room and serves, for example, to accommodate goods contained in the cold storage room, in particular to place them thereon. In particular, the shelving system comprises at least one shelf, each with opposite longitudinal sides and transverse sides. In particular, the at least one shelf faces the front or rear or one of the outer sides of the cold storage room with one of its longitudinal sides and is spaced therefrom, for example, by an intermediate space.

[0029] In the present disclosure, the term "shelf" refers in particular to a base section of a rack on which goods can be stored. The shelf can be flat, in particular full-surface. The shelf can have or consist of a plurality of base elements. For example, the base elements are flat elements or roller tracks.

[0030] In particular, the shelving system comprises at least two shelf supports, in particular elongated shelf supports. In particular, the at least two shelf supports support the at least one shelf. In particular, the at least two shelf supports are each assigned to one of the transverse sides of the at least one shelf. In particular, the at least two shelf supports extend with their longitudinal extent in the direction between the underside and the top of the refrigeration chamber, for example, in the vertical direction.

[0031] For example, the at least two shelf supports rest on a floor or stand on a floor. For example, the ceiling of the cold storage room rests on the at least two shelf supports. For example, the shelving system comprises more than two shelf supports, for example, four shelf supports. For example, the shelf supports are then assigned in pairs to each of the opposite transverse sides of the shelves.

[0032] In particular, the cold storage room has a recirculation system. For example, the recirculation system is configured to circulate an air flow, in particular within the cold storage room, for example, around the room's axis. The recirculation system promotes the cooling of the goods in the cold storage room, since the recirculation system causes or can cause the circulation of air, in particular chilled air or cool air.

[0033] In one embodiment, the recirculation system comprises one or at least one fan or fan unit and at least one nozzle device fluidly connected thereto. The nozzle device can be the nozzle device described above.

[0034] The nozzle device can generate an air flow directed toward the top or bottom of the refrigerated compartment, which flows past the at least one shelf in the region of a long side and / or impinges on the at least one shelf in the region of a long side or a long edge of the long side. This promotes optimal cooling of any refrigerated goods placed on the at least one shelf.

[0035] In one embodiment, the cold storage room has at least one goods presentation side. This gives the cold storage room a goods presentation function in order to present goods from the cold storage room to the outside, for example into the sales room, for customers. In particular, a through opening is assigned to the goods presentation side and / or the goods presentation side has a through opening. Preferably, the through opening is designed for the removal of goods. The through opening is therefore particularly configured to remove goods stored in the cold storage room from outside the cold storage room. In order to be able to close the through opening at least temporarily, the cold storage room can have at least one door element, which is assigned, for example, to the goods presentation side.

[0036] In particular, the product display side is assigned to the side of the refrigeration compartment facing the one long side of the at least one shelf and spaced therefrom by the intermediate space. In principle, this side can be the front or the rear or one of the outer sides of the refrigeration compartment. For example, the product display side is formed on this side of the refrigeration compartment and / or corresponds to this side.

[0037] The recirculation system can be configured such that the nozzle device generates an air curtain directed toward the top side or toward the bottom side, which air curtain extends along the side of at least one shelf and flows along the passage opening of the goods presentation side, i.e. the opening area of the passage opening.

[0038] In the present disclosure, the term “air curtain” is to be understood in particular to mean that the air flowing out of the nozzle device forms a barrier, for example to counteract the escape of cold air from the cooling chamber or the penetration of warm air into the cooling chamber.

[0039] In a further embodiment, the air duct element of the nozzle device has a square cross-section. In particular, the air duct element is open along one long side in the direction of its longitudinal extent. In particular, the air duct element is fastened with its open long side to the ceiling of the room unit by means of a fastening device, such as a clamp element or the like. In particular, the fastening device fastens the air duct element to the ceiling of the room unit in such a way that the open long side of the air duct is closed off by the ceiling surface, in particular is sealed airtight. This counteracts any ingress of false air via the open long side of the air duct element.

[0040] The shelving system can be a sliding shelving system. The at least one shelf is then aligned, for example, inclined downwards towards the goods presentation side. In particular, the at least one shelf then has a downward extension along its transverse sides towards the goods presentation side. This inclined position of the at least one shelf allows goods placed thereon to slide down, for example, when an item located near the lower end is removed. By assigning the lower end of the at least one shelf to the goods presentation side, the aim is to avoid any gaps in the goods presentation side.

[0041] Further details and features will become apparent from the following description of at least one embodiment with reference to the drawing. Fig. 1 an exemplary embodiment of a cooling chamber in a perspective view from the front, Fig. 2 the cold room of the Fig. 1 in a cross-sectional view, Fig. 3 an exemplary embodiment of a nozzle device which is a component of a recirculation system of the cooling room according to the Fig. 1 can be installed, for example, in the cold room according to the Fig. 1, Fig. 4 the nozzle device of the Fig. 3 using the example of two assembled air duct elements and a fan unit connected to them in a view from below, Fig. 5 the nozzle device of the Fig. 3 with the air duct elements and the fan unit according to the Fig. 4 in a view from above, Fig. 6 an air duct element of the nozzle device of the Fig. 3 in a perspective view, and Fig. 7 the air duct element of the Fig. 6 in a different perspective view.

[0042] Fig. 1 and Fig. 2 show - in schematic representation - an exemplary embodiment of a cooling room 1. The Fig. 1 shows the exemplary cooling chamber 1 in a perspective front view. Fig. Figure 2 shows the exemplary cold storage room 1 in a sectional view. The exemplary cold storage room 1 is suitable for installation in a sales area, for example, in a supermarket or a gas station. The exemplary cold storage room 1 enables the cooling of goods, such as food, beverages, or the like. At the same time, the exemplary cold storage room 1 enables the external presentation of its goods. For this purpose, the exemplary cold storage room 1 has, for example, a product presentation side 10.

[0043] The exemplary refrigerated compartment 1 preferably has a through-opening 11 on the goods presentation side 10. The through-opening 11 is preferably dimensioned such that goods located above it in the exemplary refrigerated compartment 1 can be removed and / or viewed from the outside. For example, the goods presentation side 10 is designed to be open through the through-opening 11, in particular completely open. At least one door element 12 can be assigned to the goods presentation side 10 to close the through-opening 11. Any cold losses can be minimized in this way.

[0044] For example, the at least one door element 12 is partially transparent or translucent, so that when the door element 12 is closed, the goods located in the exemplary refrigerated chamber 1 are visible from the outside. For example, the at least one door element 12 is a glass door, the surface of which at least partially comprises or consists of a glass material. For example, the at least one door element 12 is designed as a pivoting door or sliding door. The at least one door element 12 is Fig. 2. In the Fig. 1, at least one door element 12 is not shown for the sake of simplicity.

[0045] The exemplary cold storage room 1 has a bottom side 2, a top side 3, a front side 4, and a rear side 5, which preferably extend in the direction of a same spatial axis A. The exemplary cold storage room 1 further has two opposing outer sides 6, 7, which are preferably transverse to the spatial axis A. The bottom side 2 and the top side 3 preferably run horizontally or lie in a horizontal plane. The front side 4, the rear side 5, and the outer sides 6, 7 preferably run vertically or lie in a vertical plane. The product presentation side 10 is preferably assigned to the front side 4. The product presentation side 10 is preferably formed on the front side 4 and / or corresponds to the front side 4.

[0046] For example, the exemplary cooling chamber 1 is delimited downwards, i.e., in the direction of the underside 2, by a floor 2.1. The floor 2.1 can be a component of the exemplary cooling chamber 1 or can be formed by the floor area of an installation room in which the exemplary cooling chamber 1 is installed. For example, the exemplary cooling chamber 1 is delimited upwards, i.e., in the direction of the top side 3, by a ceiling 3.1. For example, the exemplary cooling chamber 1 is delimited to the rear, i.e., in the direction of the rear side 5, by a rear wall 5.1. For example, the exemplary cooling chamber 1 is delimited laterally, i.e., in the direction of the outer sides 6, 7, by a side wall 6.1 and 7.1, respectively. For example, the exemplary cooling chamber 1 is delimited to the front, i.e., in the direction of the front side 4, by a front wall and / or the at least one door element 12 described above.

[0047] The floor 2.1 and / or the ceiling 3.1 and / or the rear wall 5.1 and / or at least one of the side walls 6.1, 7.1 can be formed by one or more wall elements. The wall elements can be lightweight construction elements. This facilitates on-site assembly of the exemplary cold storage room 1.

[0048] The exemplary cold storage room 1 preferably has a shelving system 30 in its interior. The shelving system 30 preferably comprises at least one shelf 31 with opposite longitudinal sides 32, 33 and opposite transverse sides 34, 35. Preferably, one of the longitudinal sides 32, 33 of the at least one shelf 31 faces the front side 4 or the rear side 5 or one of the end sides 6, 7, in particular with the longitudinal side 32 facing the front side 4, and is arranged at a distance therefrom via an intermediate space 8. Preferably, the other longitudinal side 33 of the at least one shelf 31 faces the rear side 5 of the exemplary cold storage room 1 and is arranged at a distance therefrom, for example, via a further intermediate space 9.

[0049] The shelving system 30 preferably further comprises at least two shelf supports 36, 37, which extend with their longitudinal extent in the direction between the underside 2 and the top side 3 and support the at least one shelf 31. For example, the shelf supports 36, 37 are supported by a longitudinal end on the floor 2.1. For example, the standard supports 36, 37 are fastened by an opposite longitudinal end against the ceiling 3.1 and / or the ceiling 3.1 is supported against the shelf supports 36, 37 or rests on the shelf supports 36, 37. Preferably, the at least two shelf supports 36, 37 are each assigned to one of the transverse sides 34, 35 of the at least one shelf 31.

[0050] In addition to the shelf supports 36, 37, further shelf supports 36.1 and 37.1 can be provided to support the at least one shelf 31. For example, at least two of the shelf supports 36, 36.1, 37, 37.1, in particular the shelf supports 36 and 36.1 on the one hand and the shelf supports 37 and 37.1 on the other hand, are each assigned to one of the transverse sides 34, 35 of the at least one shelf 31.

[0051] The shelving system 30 can additionally have further shelves 31'. Preferably, the at least one shelf 31 and the further shelves 31' are arranged between the underside 2 and the top side 3 and are arranged transversely, in particular orthogonally to the spatial axis A, in a row one behind the other and in particular spaced apart from one another. For example, these further shelves 31' together with the at least one shelf 31 form a row of shelves, for example a first row of shelves.

[0052] The shelving system 30 can further comprise further shelves 31.1', which are arranged between the underside 2 and the top side 3 and are arranged transversely, in particular orthogonally to the spatial axis A, in a row one behind the other and in particular spaced apart from one another. For example, these further shelves 31.1' form a second row of shelves and are arranged transversely, in particular orthogonally to the spatial axis A, laterally to the at least one shelf 31. Preferably, the further shelves 31.1' utilize, on the one hand, the at least one shelf support 36 or 36.1 and, on the other hand, at least one further shelf support 36' or 36.1', which in turn is arranged transversely to the further shelves 31.1'.

[0053] The shelving system 30 can have further shelves 31.2', which are arranged between the underside 2 and the upper side 3 and are arranged transversely, in particular orthogonally to the spatial axis A, in a row one behind the other and in particular spaced apart from one another. These further shelves 31.2' form, for example, a third row of shelves and are arranged transversely, in particular orthogonally to the spatial axis A, laterally to the at least one shelf 31. Preferably, the further shelves 31.2' use, on the one hand, the at least one shelf support 37 or 37.1 and, on the other hand, at least one further (in the Fig. 1 and Fig. 2 not visible) shelf support, which in turn is arranged transversely to the other shelves 31.2'.

[0054] The shelving system 30 can be a sliding shelving system. For this purpose, the at least one shelf 31 is preferably inclined. For example, the at least one shelf 31 has an inclined position along its transverse sides 34, 35.

[0055] For example, the longitudinal side 33 of the at least one shelf 31 facing the rear side 5 is higher than the longitudinal side 32 facing the front side 4 of the refrigerated compartment 1. This inclined position of the at least one shelf 31 allows goods placed thereon to slide down, for example, when goods located near the lower end are removed.

[0056] As can be seen from the Fig. 1 and Fig. 2, the exemplary cooling room 1 preferably has a recirculation system, for example to circulate air within the cooling room 1 around the room axis A. This air or recirculation promotes a uniform cooling of the goods stored in the exemplary cooling room 1. Preferably, the recirculation system is equipped with a (in the Fig. 1 and Fig. 2 not shown) cooling generator in order to cool the circulating air flow to a predetermined temperature value at at least one point.

[0057] Within the exemplary cold room 1, a (in the Fig. 1 and Fig. 2, a heat exchanger or evaporator may be provided, which is operatively connected or can be operatively connected to a refrigeration system. In principle, a refrigeration machine may also be provided in the exemplary cold room 1. For example, such a refrigeration machine may be arranged on the ceiling 3.1 or in the region of the ceiling 3.1 of the cold room 1. The exemplary cold room 1 may then have an air inlet for introducing cold air generated by the refrigeration machine into the exemplary cold room 1.

[0058] Preferably, the recirculation system has at least one (in the Fig. 1 and Fig. 2 not shown) fan. Preferably, the at least one fan is configured to generate an air flow or recirculating air flow. Preferably, the recirculating air system further comprises at least one nozzle device 50, which is, for example, fluidically connected to the at least one fan. Preferably, the nozzle device 50 comprises at least one air duct element 52, such as shown, for example, in FIGS. Fig. 1 and Fig. 2 is evident.

[0059] Fig. 3 shows, by way of example, a section of the exemplary cooling chamber 1 in a perspective view in the direction of the ceiling 3.1, wherein, for example, the door element 12 is open and thus the nozzle device 50 is visible. As can be seen therefrom, the air duct element 52 can be elongated and arranged with its longitudinal extension, for example, running alongside the at least one shelf 31. For example, the air duct element 52 has nozzle tubes 53 on its circumference, which are directed, for example, towards the intermediate space 8 ( Fig. 2), for example, to direct an air flow according to arrow 80 into the intermediate space 8. For example, this air flow forms an air curtain which at least partially covers the passage opening 11 of the product presentation side 10.

[0060] As from the Fig. 3, in addition to the air duct element 52, at least one further air duct element 52' can be provided, which adjoins a longitudinal end of the air duct element 52. For example, the air duct element 52 and the at least one further air duct element 52' are connected to one another at their longitudinal ends, in particular are fluidly connected. For example, the air duct element 52 extends in the area between the shelf supports 36 and 37. For example, the further air duct element 52' extends in the area between the shelf support 37 and the (in the Fig. 3 not visible) further shelf support. In this respect, the air duct element 52 and the at least one further air duct element 52' can each cover or supply a row of shelves with the associated shelves 31, 31' or 31.1, 31.1' or 31.2, 31.2'.

[0061] In the Fig. 3, a fastening device 68 is indicated, via which the air duct element 52 or the at least one further air duct element 52' can be fastened against a wall of the exemplary cooling chamber 1, for example against the ceiling 3.1 of the exemplary cooling chamber 1. For example, the air duct element 52 or the at least one further air duct element 52' can be designed to be open with its longitudinal side facing the wall or ceiling 3.1.

[0062] Fig. 4 shows an exemplary embodiment of the nozzle device 50 with the air channel element 52 and the at least one further air channel element 52'. Fig. 4, the air duct element 52 and the at least one further air duct element 52' are flow-connected to one another at a longitudinal end 58, for example. Preferably, the air duct element 52 is closed at the opposite longitudinal end 57. Preferably, the at least one further air duct element 52' is also closed at the opposite longitudinal end. By way of example, in the Fig. 4 shows a fan unit 69, which, for example, consists of or may comprise at least one, preferably several, fans 51. Preferably, the fan unit 69 also includes an evaporator. In this case, it is a combination of an evaporator unit and a fan unit.

[0063] The Fig. 4 shows an example of the structure in a view from below of the air duct element 52 or the at least one further air duct element 52', i.e. of the outflow side. Fig. 5 shows the structure of the Fig. 4 from above onto the air duct element 52 or the at least one further air duct element 52', i.e. onto the inflow side. For illustration purposes, Fig. 6 and Fig. 7 the air duct 52 each alone in a different perspective view.

[0064] As can be seen from the Fig. 4 to 7, the nozzle pipes 53 are preferably designed as pipe bends, for example as 90° bends. For example, the nozzle pipes 53 are arranged within the air duct element 52 or 52' and open, preferably with a pipe end 53.1, into associated outlet openings 54 of the air duct element 52 or 52'. For example, the pipe ends 53.1 are each inserted into the associated outlet openings 54. For example, the nozzle pipes 53.1 are each held in the associated outlet openings 54 with their one pipe end 53.1 so as to be rotatable about the associated pipe axis RA1. For example, the outlet openings 54 are arranged on an identical or common longitudinal side 55 of the air duct element 52 or 52'.

[0065] As can be seen in particular from the Fig. 4 and Fig. 7, the outlet openings 54 can be spaced apart from one another in the direction of the longitudinal extent of the air duct element 52 or 52' and, preferably with their respective pipe axis RA1, lie on a line 56 that deviates from a straight line. In this case, the line 56 with the outlet openings 54 lying thereon can run towards the opposite longitudinal ends 57, 58 of the air duct element 52 in the direction of an identical longitudinal edge 55.1 of one longitudinal side 55 of the air duct element 52. The line 56 with the outlet openings 54 lying thereon can also run once, i.e. only once, towards a longitudinal edge 55.2 of one longitudinal side 55. Preferably, the longitudinal edge 55.2 is opposite the longitudinal edge 55.1 of one longitudinal side 55 of the air duct element 52.

[0066] As can be seen in particular from the Fig. 5, at least one or more of the nozzle pipes 53, in particular the nozzle pipes 62, can have an orientation with their other pipe end 53.2 in which the pipe axis RA2 of the other pipe end 53.2 runs transversely, in particular orthogonally, to the longitudinal axis LA of the air duct element 52 between the longitudinal edges 55.1, 55.2 of one longitudinal side 55 of the air duct element 52.

[0067] For example, the air duct element 52 has an air supply opening 61 on a longitudinal side 60 adjacent to one longitudinal side 55. For example, the other pipe end 53.2 of the individual or multiple nozzle pipes 62 points toward the air supply opening 61. For example, further individual or multiple nozzle pipes 53 have their other pipe end 53.2 aligned such that the pipe axis RA2 of the other pipe end 53.2 runs in the direction of, or substantially in the direction of, the longitudinal axis LA of the air duct element 52.

[0068] The air duct element 52' has, for example, an air supply opening 65 on its transverse side 64, and the other pipe end 53.2 of at least one or more of the nozzle pipes 53, in particular the nozzle pipes 63, are arranged in an inlet region 66 of the air duct element 52' adjoining the air supply opening 65. For example, the individual or more nozzle pipes 63 have an orientation with their other pipe end 53.2 in which the pipe axis RA2 of the other pipe end 53.2 runs in the direction of, or substantially in the direction of, the longitudinal axis LA of the air duct element 52'.

[0069] As particularly in the Fig.As indicated in Figure 6, at least one wall 70 of the air duct element 52 can have or be formed from a hollow chamber structure 71. The hollow chamber structure 70 can have a plurality of elongated hollow chambers 72, of which adjacent hollow chambers 72.1, 72.2 are separated from one another by an elongated web 73. In particular, the longitudinal extent of the web 73 runs transversely, in particular orthogonally, to the longitudinal extent of the air duct element 52.

[0070] Two adjacent walls of the air duct element 52 can have the hollow chamber structure 51 and be connected via a connecting profile 74. The connecting profile 74 can, viewed in cross-section, have two U-shaped receptacles 74.1, 74.2. For example, the legs of one receptacle 74.1 are arranged transversely, in particular orthogonally, to the legs of the other receptacle 74.2. List of reference symbols 1 cold room 2 Bottom 2.1 Soil 3 Top 3.1 Ceiling 4 Front 5 Back 5.1 Rear wall 6 Outside 6.1 Side wall 7 Outside 7.1 Side wall 8 gap 9 further space 10 Product presentation page 11 Passage opening 12 door element 30 shelving system 31 shelves 31' additional shelves 31.1' additional shelves 31.2' additional shelves 32 long side 33 Long side 34 short side 35 short side 36 shelf support 36.1 Shelf support 36' shelf support 36.1' Shelf Support 37 Shelf support 37.1 Shelf support 50 nozzle device 51 Fan 52 Air duct element 52' air duct element 53 nozzle pipes 53.1 Pipe end 53.2 Pipe end 54 outlet openings 55 long side 55.1 longitudinal edge 55.2 longitudinal edge 56 Line 57 long side end 58 long side end 60 adjacent long side 61 Supply air opening 62 nozzle pipes 63 nozzle pipes 64 short side 65 Supply air opening 66 Entrance area 67 Long side 68 Fastening device 69 Fan unit 70 wall 71 Hollow chamber structure 72 hollow chambers 72.1 adjacent hollow chamber 72.2 adjacent hollow chamber 73 jetty 74 Connection profile 74.1 Recording 74.2 Recording 80 Arrow A spatial axis RA1 tube axis RA2 tube axis LA longitudinal axis QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2021 108 431 A1 [0002, 0010, 0016]

Claims

[1] Nozzle device (50) for a recirculation system of a cold room (1), comprising at least one elongated air duct element (52) with a polygonal cross-sectional contour and several or a plurality of nozzle pipes (53) which are designed as pipe bends and are arranged within the air duct element (52) and open with a pipe end (53.1) into associated outlet openings (54) of the air duct element (52), wherein the outlet openings (54) are arranged on a same longitudinal side (55) of the air duct element (52), characterized by that in the direction of the longitudinal extent of the air duct element (52) the outlet openings (54) are spaced apart from one another on a line (56) deviating from a straight line. [2] Nozzle device according to claim 1, wherein the line (56) with the outlet openings (54) lying thereon has a curvature. [3] Nozzle device according to claim 1 or 2, wherein the line (56) with the outlet openings (54) lying thereon has a kink. [4] Nozzle device according to one of the preceding claims, wherein the line (56) with the outlet openings (54) lying thereon extends towards the opposite longitudinal ends (57, 58) of the air duct element (52) in the direction of a same longitudinal edge (55.1) of the one longitudinal side (55) of the air duct element (52). [5] Nozzle device according to one of the preceding claims, wherein the line (56) with the outlet openings (54) lying thereon runs once in the direction of a longitudinal edge (55.2) of one longitudinal side (55) of the air duct element (52). [6] Nozzle device (50) for a recirculation system of a cooling room (1), in particular according to one of the preceding claims, comprising at least one elongated air duct element (52) with a polygonal cross-sectional contour and several or a plurality of nozzle pipes (53) which are designed as pipe bends and are arranged within the air duct element (52) and open with a pipe end (53.1) into associated outlet openings (54) of the air duct element (52), wherein the outlet openings (54) are arranged on a same longitudinal side (55) of the air duct element (52), characterized by that at least one or more of the nozzle pipes (53) have an alignment with their other pipe end (53.2) in which the pipe axis (RA2) of the other pipe end (53.2) runs transversely to the longitudinal axis (LA) of the air duct element (52) between the longitudinal edges (55.1, 55.2) of one longitudinal side (55) of the air duct element (52). [7] Nozzle device according to claim 6, wherein the air duct element (52) has an air supply opening (61) on a longitudinal side (60) adjacent to the one longitudinal side (55) and the other pipe end (53.2) of the individual or multiple nozzle pipes (62) points in the direction of the air supply opening (61). [8] Nozzle device according to claim 6 or 7, wherein at least one or more of the nozzle tubes (53) have an alignment with their other tube end (53.2) in which the tube axis (RA2) of the other tube end (53.2) runs in the direction of the longitudinal axis (LA) of the air duct element (52) between the longitudinal edges (55.1, 55.2) of one longitudinal side (55) of the air duct element (52). [9] Nozzle device according to claim 8, wherein the air duct element (52') has an air supply opening (65) on a transverse side (64) and the other pipe end (53.2) of the individual or several nozzle pipes (63) are arranged in an inlet region (66) of the air duct element (52) adjoining the air supply opening (65). [10] Nozzle device (50) for a recirculation system of a cooling room (1), in particular according to one of the preceding claims, comprising at least one elongated air duct element (52) with a polygonal cross-sectional contour and several or a plurality of nozzle pipes (53) which are designed as pipe bends and are arranged within the air duct element (52) and open with a pipe end (53.1) into associated outlet openings (54) of the air duct element (52), wherein the outlet openings (54) are arranged on a same longitudinal side (55) of the air duct element (52), characterized bythat at least one wall (70) of the air duct element (52) has or is formed from a hollow chamber structure (71). [11] Nozzle device according to claim 10, wherein the hollow chamber structure (70) has a plurality of elongate hollow chambers (72), of which adjacent hollow chambers (72.1, 72.2) are separated from one another by an elongate web (73) whose longitudinal extent runs transversely to the longitudinal extent of the air duct element (52). [12] Nozzle device according to claim 10 or 11, wherein the hollow chamber structure (70) comprises or consists of a plastic material, in particular a polycarbonate. [13] Nozzle device according to one of claims 10 to 12, wherein the hollow chamber structure (70) is a hollow chamber plate. [14] Nozzle device according to one of claims 10 to 13, wherein two adjacent walls of the air duct element (52) have the hollow chamber structure (71) and are connected via a connecting profile (74) which has two U-shaped receptacles (74.1, 74.2), the legs of one receptacle (74.1) being transverse to the legs of the other receptacle (74.2). [15] Cooling room (1), comprising a bottom side (2), a top side (3), a front side (4) and a back side (5) which extend in the direction of a same spatial axis (A), and two outer sides (6, 7) which are opposite one another and transverse to the spatial axis (A), a shelving system (30) comprising at least one shelf (31) with mutually opposite longitudinal sides (32, 33) and transverse sides (34, 35), wherein the at least one shelf (31) faces the front side (4) or the rear side (5) or one of the outer sides (6, 7) with one of the longitudinal sides (32, 33) and is spaced therefrom by an intermediate space (8), at least two shelf supports (36, 37) which extend with their longitudinal extent in the direction between the underside (2) and the upper side (3) and carry the at least one shelf (31), wherein the at least two shelf supports (36, 37) are each assigned to one of the transverse sides (34, 35) of the at least one shelf (31), a recirculation system comprising a fan (51) and at least one nozzle device (50) flow-connected thereto according to one of the preceding claims, wherein the air duct element (52) of the nozzle device (50) runs with its longitudinal extent alongside the at least one compartment floor (31). [16] Cooling chamber according to claim 15, wherein the air duct element (52) is open in the direction of its longitudinal extension along a longitudinal side (67) and the air duct element (52) is fastened with its open longitudinal side (67) against a wall of the cooling chamber (1), in particular the ceiling (3.1) of the cooling chamber (1), via a fastening device (68).

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