Abstract
Disclosed is a cooling device (1), in particular for a galley of an aeroplane, comprising a cooling compartment (2) formed by inner walls (12, 13, 14, 15) of the cooling device, holding at least one refrigerated goods container (20), in particular a trolley, and further comprising a cooling air feed device (3) for introducing cooled air into the cooling compartment and a hot air discharge device (4) for discharging heated air (98) from the cooling compartment, wherein a primary flow channel is configured in use with the at least one refrigerated goods container (20) in the cooling compartment (2) between the inner walls (12, 13, 14, 15) of the cooling device and outer walls (22, 23, 24, 25) of the at least one refrigerated goods container (20), to guide a cooling air flow along a primary flow direction, deflected a plurality of limes through the arrangement of inner walls, from the cooling air feed device (3) around the at least one refrigerated goods container (20) to the hot air discharge device (4). According to the invention, the cooling air feed device (3) is configured to introduce the cooled air as jets into the primary flow channel along the primary flow direction (x), and in the cooling compartment (2) a secondary flow channel (9) is configured to return, as a secondary flow (9A), a portion (9A) of the cooling air flow guided through the primary flow channel around the at least one refrigerated goods container (20) into the primary flow channel for the purpose of mixing the introduced cooled air and forming a circulation flow (97) around the at least one refrigerated goods container (20) along the primary flow direction (x).
Claims
1. In a cooler for an on-board kitchen of an aircraft and having: a cooling compartment defined by inner walls of the cooler for receiving a refrigerated-goods container; a cool-air input device for introducing cool air into the cooling compartment; and a hot-air extractor for discharging heated air from the cooling compartment, wherein, when used in conjunction with the a refrigerated-goods container in the cooling compartment, the inner walls of the cooler and outer walls of the a refrigerated-goods container form a primary flow passage for guiding a cool-air stream along a primary flow direction multiply deflected by the inner walls from the cool-air input device around the a refrigerated-goods container to the hot-air extractor is formed, the improvement wherein the cool-air input device introduces the cool air into the primary flow passage along a primary flow direction in the form of a stream, and a secondary flow passage is formed in the cooling compartment in order to return, as a secondary flow, a portion of the cool-air stream guided by the primary flow passage around the a refrigerated-goods container to the primary flow passage for the purpose of mixing with the introduced cool air and forming a circulation flow around the a refrigerated-goods container along the primary flow direction.
2. The cooler defined in claim 1, wherein the cool-air input device and the hot-air extractor are mounted on one or two of the inner walls of the cooler so as to be adjacent to one another, and or the cool-air input device or the hot-air extractor is on two mutually adjacent inner walls of the cooler for deflecting the primary flow direction, or or the cool-air input device and the hot-air extractor form a combined air supply/discharge device.
3. The cooler defined in claim 1, wherein the secondary flow passage is formed by one of the outer walls of the a refrigerated goods container and an outer wall of the hot-air extractor or an outer wall of the cool-air input device.
4. The cooler defined in claim 1, wherein the secondary flow passage is formed by an intermediate wall provided in the cooling compartment and an outer wall, spaced apart therefrom, of the hot-air extractor or an outer wall of the cool-air input device.
5. The cooler defined in claim 1, wherein the cool-air input device introduces the cool air as a stream or as a plurality of streams in an upstream part of the primary flow passage over an entire width and an entire height of the primary flow passage in the upstream part, and or the upstream part is formed without a deflection of the primary flow direction by the arrangement of the inner walls of the cooler, or at least with a deflection of the primary flow direction that does not exceed 25°.
6. The cooler defined in claim 5, further comprising: an airflow guiding wall for conducting the introduced cool air is in the upstream part, and or the airflow guiding wall, when used in conjunction with the a refrigerated-goods container, is adjacent thereto.
7. The cooler defined in claim 5, wherein a flow boundary of the stream or flow boundaries of the plurality of streams is or are facing toward the secondary flow passage and completely fills or fill out a plane perpendicular to the primary flow direction in the upstream part.
8. The cooler defined claim 1, wherein the cool-air input device introduces the cool air as a stream or as a plurality of streams or stream segments in an upstream part of the primary flow passage such that a center flow axis of the stream or streams is aligned along the primary flow direction or spans with the primary flow direction an introduction angle of no more than 30°.
9. The cooler defined in claim 1, wherein the cool-air input device has one or more outlet ports with edges for the passage of the cool air into an upstream part of the primary flow passage, and or a connecting line or connecting plane that extends from a respective edge facing toward this wall of the primary flow passage to this wall of the primary flow passage strikes this wall at an angle of no more than 17.5°.
10. The cooler defined in claim 1, wherein the cool-air input device has several outlet ports with edges for the passage of the cool air into an upstream part of the primary flow passage, and, for two respective mutually adjacent outlet ports, two lines or planes that project from mutually adjacent edges of the mutually adjacent outlet ports, intersecting in the upstream part and forming together an angle of no more than 35°.
11. The cooler defined in claim 1, wherein the cool-air input device has an outlet port that is formed as a slot extending along the direction of width of the primary flow passage, over the entire width, and is formed as a port projecting into the primary flow passage.
12. The cooler defined in claim 1, wherein the cool-air input device has several outlet ports that are along an axis running in the direction of width of the primary flow passage and are each formed as a circular or slot or as a port projecting into the primary flow passage.
13. The cooler defined in claim 11, claim 1, wherein the cool-air input device comprises a first plurality of slots running along a first axis extending in the direction of width of the primary flow passage, each with uniform longitudinal orientation in the direction of width or height of the primary flow passage, and the cool-air input device also comprises a second plurality of slots along a second axis extending in the direction of width of the primary flow passage, each with a uniform longitudinal orientation transverse to the longitudinal orientation of the first plurality.
14. The cooler defined in claim 1, wherein the cool-air input device has an outlet port for the passage of the cool air into the primary flow passage, with the outlet port being formed by an opened, closeable flap or lip of a temperature control device.
15. The cooler defined in claim 1, wherein the cool-air input device has one outlet port or several outlet ports for the passage of the cool air into the primary flow passage, and or an air-permeable screen with single bend or multiple bends is provided upstream from the outlet port.
16. The cooler defined in claim 1, wherein the primary flow passage and the secondary flow passage are blower-free.
17. The cooler defined in claim 1, wherein the cooling compartment is designed to receive a parallepipedal refrigerated-goods container and is provided on a side inner wall of the cooling compartment with an upper holding and introducing device for holding and introducing the refrigerated-goods container, and or the upper holding and introducing device is provided with a passage for the cool air introduced into the primary flow passage to the side inner wall.
18. The cooler defined in claim 1, wherein the cooling compartment is designed to receive a parallepipedal refrigerated-goods container and the refrigerated-goods container further comprises a side wall cool-air input device associated with a side wall of the a refrigerated-goods container for feeding cool air to the cooling side wall.
19. The cooler defined in claim 1, wherein the cooling compartment is designed to receive a plurality of refrigerated-goods containers, or the primary flow passage or the secondary flow passage extends in its width over all of the plurality of refrigerated-goods containers, and or the cool-air input device introduces the cool air into the primary flow passage for all of the plurality of refrigerated-goods containers.
20. (canceled)
21. A method of cooling in an on board kitchen of an aircraft a refrigerated-goods container held in a cooler, the method comprising the steps of: introducing cool air into the cooling compartment of the cooler, guiding a cool-air stream along a primary flow direction multiply deflected by the arrangement of the inner walls of the cooler around the a refrigerated-goods container, and heated air is discharged from the cooling compartment, introducing the cool air in the manner of a stream into the primary flow passage along the primary flow direction, and or recirculating a portion of the cool-air stream guided through the primary flow passage around the a refrigerated-goods container through the secondary flow passage to the primary flow passage for mixing with the introduced cool air and forming a circulation flow of the cool air and the recirculated cool air around the a refrigerated-goods container along the primary flow direction.
Description
BRIEF DESCRIPTION OF THE DRAWING
[0040] To describe the proposed cooler, embodiments will now be described with reference to the following figures.
[0041] FIG. 1 shows an embodiment of the proposed cooler holding a refrigerated-goods container.
[0042] FIG. 2 is a three-dimensional view of the refrigerated-goods container, with the cooler being shown schematically in order to clearly show a primary flow direction.
[0043] FIG. 3 is a three-dimensional view of an embodiment of the proposed cooler.
[0044] FIG. 4 shows a detail of FIG. 3, namely a combined cool-air input device and hot-air extractor of an embodiment of the proposed cooler with a wide, slot-like outlet port.
[0045] FIG. 5 shows a sectional view of a combined cool-air input device and hot-air extractor of an embodiment of the proposed cooler with several through hole-type outlet ports.
[0046] FIG. 6 is a sectional view of a combined cool-air input device and hot-air extractor of an embodiment of the proposed cooler with several through slot-like outlet ports.
[0047] FIG. 7 is a sectional view of a combined cool-air input device and hot-air extractor of another embodiment of the proposed cooler with several slot-like outlet ports.
[0048] FIG. 8 is a sectional view of a combined cool-air input device and hot-air extractor of another embodiment of the proposed cooler with several nozzles as outlet ports.
[0049] FIG. 9 is a sectional view of a combined cool-air input device and hot-air extractor of another embodiment of the proposed cooler with a first and a second plurality of outlet ports.
[0050] FIG. 10 is a three-dimensional view of another embodiment of the proposed cooler.
[0051] FIG. 11 is a detail of FIG. 10, namely a combined cool-air input device and hot-air extractor of an embodiment of the proposed cooler with a wide, slot-like outlet port.
[0052] FIG. 12 is another embodiment of the proposed cooler with a refrigerated-goods container held therein and angled introduction of the cool air.
[0053] FIG. 13 is another embodiment of the proposed cooler with a refrigerated-goods container held therein and angled introduction of the cool air via a closeable flap.
[0054] FIGS. 14A and 14B each show an embodiment of a port as part of a cool-air input device with an integrated screen according to other embodiments of the proposed cooler.
[0055] FIGS. 15A and 15B show another embodiment of the proposed cooler with guides for side-wall flow.
[0056] FIGS. 16A and 16B show another embodiment of the proposed cooler with a separate side-wall cool-air input device.
[0057] FIG. 17 is another embodiment of the proposed cooler with spaced-apart cool-air input device and hot-air extractor.
[0058] FIGS. 18A, 18B, and 18C show embodiments of the proposed cooler with at least one outlet port with edges for the passage of cool air into an upstream part of the primary flow passage.
[0059] FIG. 19 is another embodiment of the proposed cooler that is related to the embodiment shown in FIG. 18C.
[0060] FIG. 20 is an embodiment of the proposed cooler that is designed to hold a plurality of refrigerated-goods containers.
[0061] FIG. 21 is an embodiment of the proposed cooler with an intermediate wall for forming the secondary flow passage.
[0062] FIG. 22 is another embodiment of the proposed cooler.
[0063] FIG. 23 is a known cooler according to the prior art as the starting point for the present invention.
[0064] In the figures shown, identical or similar components are designated with the same reference symbols throughout.
EMBODIMENTS OF THE INVENTION
[0065] FIG. 1 is a view (not to scale) of an embodiment of the proposed cooler with a refrigerated-goods container held therein. The cooler 1 has a cooling compartment 2 having a substantially parallepipedal shape formed by its inner walls 12, 13, 14, and 15 and two other inner walls (not shown) and holding a substantially parallepipedal refrigerated-goods container 20 with wheels 21 that is designed for use as a trolley in aircraft. Furthermore, the cooler 1 comprises a cool-air input device 3 with an outlet opening or port 5 for introducing a free jet of cool air centered on a flow axis 5A with an expansion angle or spread angle 6 in an upstream part 7 of a primary flow passage. The primary flow passage is formed by a row of primary flow passage portions each formed by an inner wall 12, 13, 14, 15 of the cooler 1 and an outer wall 22, 23, 24, 25 of the refrigerated-goods container 20 opposite the respective inner wall, as well as two side inner walls (not shown) of the cooler 1. The primary flow through the primary flow passage is deflected and/or guided by the inner walls 12 to 15 of the cooler 1 along the primary flow directions 8-2, 8-3, 8-4, and 8-5 (coordinates or general designation: x). The air flowing along the primary flow direction 8-5 is divided up in the primary flow passage portion of the walls 15 and 25. A portion 98 thereof is discharged from the cooling compartment 2 by a hot-air extractor 4. Another portion 9A is returned as a secondary flow through a secondary flow passage 9 to the upstream part 7 or aspirated into the upstream part 7 by the suction or negative pressure prevailing in the upstream part 7 that is caused by the cool air being introduced at a high flow velocity. This portion of the airflow that is flowed or flows through the secondary flow passage 9 forms a circulation flow 97 mixing with the flow of introduced cool air. Accordingly, the primary flow passage that is formed by the inner walls 12 to 15 of the cooler 1 and the outer walls 22 to 25 of the refrigerated-goods container 20 with the primary flow direction x, and the secondary flow passage 9 that is formed by a portion of the outer wall 25 of the refrigerated-goods container 20 and an outer wall 4A of the hot-air extractor 4, possibly also by an adjacent portion of an outer wall of the cool-air input device 3, form a circulation passage around the refrigerated-goods container 20. The flow in this circulation passage is aligned in the primary flow direction.
[0066] As shown in FIG. 1, the expansion angle 6 of the stream of cool air emerging from the outlet port 5 is such that the cool air is not introduced counter to the primary flow direction x or 8-2 into the primary flow passage, and such that the flanks of the stream or the flow boundaries 6F, 6G completely cover the connection between the secondary flow passage and the primary flow passage. At the boundaries 6F, 6G determined by the spread angle 6, the flow velocity of the introduced cool air in the primary flow direction is approximately zero or is less than 1% of the maximum velocity. At position x0 of the upstream part, the stream of introduced cool air extends over the entire cross section of the primary flow passage.
[0067] The cool-air input device 3 and the hot-air extractor 4 are spaced from one another in the cooling compartment 2 so as to be at the corner of adjacent inner walls 12 and 15 of the cooler 1, with the primary flow direction x being deflected by the cool-air input device 3 and the hot-air extractor 4.
[0068] FIG. 2 is a three-dimensional view of the refrigerated-goods container 10 held in the cooling compartment 2 (indicated by broken lines). FIG. 2 illustrates the deflections of the primary flow direction x as a result of the arrangement of the inner walls of the cooler 1. A width y of the primary flow passage or of one of the portions thereof is indicated by the dimension transverse to the primary flow direction x. The height z of the primary flow passage or of one of the portions thereof indicates the distance between each inner wall 12, 13, 14, 15 of the cooler 1 and the respective opposite outer wall 22, 23, 24, 25 of the refrigerated-goods container 20.
[0069] FIG. 3 is approximately a three-dimensional view of the cooler 1 shown in FIG. 1 with the refrigerated-goods container 20 held therein. In particular, FIG. 3 illustrates an embodiment of the cool-air input device 3 and the hot-air extractor 4.
[0070] FIG. 4 is an enlarged illustration of the region indicated at 40 in FIG. 3 and shows the mixing of the cool air freshly introduced through the outlet port 5 (arrows 5B) and the air of the secondary flow (arrows 9A) in the upstream part of the primary flow passage. The outlet port 5 is formed as a slot with the height h extending over nearly the entire width (y direction) of the primary flow passage. The cool-air input device 3 and the hot-air extractor 4 form a combined air supply/extraction passage, with an air supply duct 3K of the cool-air input device 3 for feeding in cool air 3L and an air discharge passage 4K of the hot-air extractor 4 for extracting heated air 4L that is fed through an output port 4B into the air discharge passage 4K separated by a partition 46. As shown in FIG. 4, the air of the secondary flow represented by the bent arrows 9A is fed into the cool air 5B. Together, these form a circulation flow 97 in the primary flow direction x.
[0071] FIGS. 5 to 9 show other embodiments for the cool-air input device 3 that, instead of the wide slot shown in FIG. 4, have a plurality of outlet ports 5.
[0072] In the cool-air input device 3 shown in FIG. 5, several outlet ports 5 are identical circular throughgoing holes of equal size that are equispaced apart from one another. Due to the through holes as outlet ports 5, spaced apart by intermediate wall portions 5W and through which the freshly introduced cool air (arrows 5B) flows into the upstream part of the primary flow passage, the air of the secondary flow is conducted both below (arrows 9A-1) the cool air 5B and hence in the vicinity of the outer wall of the refrigerated-goods container 20 and, when seen in the z direction, above (arrows 9A-2) the cool air 5B. The intermediate wall portions 5W make it possible for a portion of the secondary flow 9A to be conducted above the cool air 5B introduced in the manner of a stream segment.
[0073] The cool-air input device 3 shown in FIG. 6 has several outlet ports 5 that are equispaced slots through intermediate wall portions 5W that are elongated parallel to the width of the primary flow passage (y direction). The air of the secondary flow is conducted both below (arrows 9A-1) the cool air 5B and above (arrows 9A-2) the cool air 5B.
[0074] The cool-air input device 3 shown in FIG. 7 has several outlet ports 5 that are equispaced slots separated by intermediate wall portions 5W and that are elongated parallel to the height of the primary flow passage (z direction). The freshly introduced cool air is introduced into the upstream part as a plurality of streams that each extend from the outer wall of the refrigerated-goods container 20 (arrows 5B-1) to the inner wall of the cooler (arrows 5B-2). The air of the secondary flow 9A reaches the areas of the intermediate wall portions 5W between the streams of the introduced cool air and is entrained by same.
[0075] The cool-air input device 3 shown in FIG. 8 has several outlet ports 5 that are equispaced ports 5P projecting through intermediate wall portions 5W in the primary flow direction x. In the areas of the intermediate wall portions 5W, the air of the secondary flow 9A can flow behind the nozzles 5P (when seen in the x direction) in order to then be entrained by the freshly introduced cool air.
[0076] As an arrangement of outlet ports 5, the cool-air input device 3 shown in FIG. 9 has a combination of the arrangements of slots shown in FIGS. 6 and 7. A first plurality of uniformly spaced slots 51, each elongated in the direction of height (z direction) of the primary flow passage, is along a first axis y1 running in the direction of width of the primary flow passage. In addition, a second plurality of uniformly spaced slots 52, each elongated in the direction of width (y direction) of the primary flow passage, is along a second axis y2 running in the direction of width of the primary flow passage that is spaced apart from the first axis and faces toward the adjacent inner wall of the cooler. The arrangement of the openings 51 and 52 forms an overall comb-like outlet port. Accordingly, the cool air is introduced with a comb-like flow profile into the upstream part that is shown in FIG. 9 by the arrows 5B-1 and 5B-2 associated with the outlet ports 51 and the arrows 5B-3 associated with the outlet ports 52, with these arrows being analogous to the “teeth” of the comb and the connecting members thereof. The air of the secondary flow 9A is entrained analogously in the recesses of the “teeth” by the suction of the cool air 5B-1, 5B-2, and 5B-3 flowing quickly past.
[0077] The sectional views of FIGS. 10 and 11 show an embodiment of the cooler in which the cool-air input device 3 and the hot-air extractor 4 form a combined air supply/air discharge passage, with the cool-air input device 3 and the hot-air extractor 4 being mounted on the front inner wall 15 of the cooler 1 and removed from a place in which the primary flow direction is deflected. The air of the secondary flow represented by the arrows 9A and the cool air (represented by the arrow 5B) freshly introduced through the wide slot travel in the same direction. The outer wall of the cool-air input device 3 and the hot-air extractor 4, together with a portion of the outer wall of the refrigerated-goods container 20, form the secondary flow passage.
[0078] FIG. 12 is a view (not to scale) of an embodiment of the proposed cooler holding a refrigerated-goods container. Unlike the embodiment shown in FIG. 1, the cooler shown in FIG. 12 introduces a stream of cool air along a center flow axis 5A that forms an introduction angle 6A of less than 20° with the primary flow direction 8-2 in the primary flow passage formed by the inner wall 12 and the outer wall 11. The outlet port 5 is formed such that the cool air is not introduced counter to the primary flow direction into the primary flow passage, and such that the flank of the stream or the flow boundary 6F completely covers the connection between the secondary flow passage 9 and the primary flow passage. The flow boundary 6F then forms a plane of negative pressure extending completely in the y direction and the z direction, with the result that only heated air is fed from the secondary flow passage to the stream of cool air.
[0079] FIG. 13 is another embodiment of the proposed cooler as a variation of the embodiment shown in FIG. 12. The cooler 1 shown in FIG. 13 has an outlet port 5 that is formed by a clipped-off edge 11A of an opened closeable flap 11 of a temperature control device (not shown in its entirety). In a closed position 11B of the closeable flap 11, the outlet port 5 is blocked, so that the cool-air input device 3 cannot introduce any cool air into the primary flow passage.
[0080] FIGS. 14A and 14B each show an embodiment of a port 5P formed by converging outer walls 89A, 89B with an outlet port 5 as part of a cool-air input device 3 according to other embodiments of the proposed cooler. A bent, air-permeable screen 90 or 91 is provided upstream of the outlet opening in the port according to FIGS. 14A and 14B, with the bend apex or a plurality of bend apexes of the screen facing away from the outlet port 5 and thus aligned against the direction of flow, and with the ends of the screen 90 and 91 mounted at the ends of the outer walls 89A, 89B forming the outlet port, so that the screen surface is greater than the port cross section.
[0081] FIGS. 15A, 15B, 16A, and 16B each show a different embodiment of the proposed cooler holding a parallepipedal refrigerated-goods container. For a side wall 26 of the parallepipedal refrigerated-goods container 20, multiple upper guides 27A and 27B (FIGS. 15A and 15B) or one upper guide 27D (FIGS. 16A and 16B) and a lower guide 27C are provided to guide a side-wall flow 28. These guides are mounted on the inner wall of the cooler 1 that faces the side wall 26 thereof when used in conjunction with the refrigerated-goods container 20. As shown in FIGS. 15A and 15B, the upper guides 27 and 27B are mounted in the vicinity of the upper corners of the side wall 26 in order to deflect the air flowing along the primary flow direction 8-2 at the edges of the upper-side wall 22 of the refrigerated-goods container 20 such that the side-wall flow 28 flows in a circulating manner past the side wall 26 with cool air. As shown in FIGS. 15A, 15B and FIGS. 16A, 16B, the guide 27C for introducing and holding the refrigerated-goods container 20, which is a trolley, extending longitudinally along the lower edge of the side wall 26 is also mounted in the vicinity of the lower end of the side wall 26 in both embodiments.
[0082] While the side wall 26 is flowed around in the embodiment of FIGS. 15A, 15B by cool air fed in via the outlet port 5, a portion of which is conducted in the primary flow passage, a side wall cool-air input device 29 that is separate from the cool-air input device 3 and the outlet port thereof and can also be coupled with or connected to the cool-air input device 2 is provided in order to introduce cool air along the side wall flow direction 29A of the side wall 26 to be cooled.
[0083] FIG. 17 is another embodiment of the proposed cooler with a refrigerated-goods container held therein. Unlike the previous embodiments, the cool-air input device 3 and the hot-air extractor 4 are in opposing corners of the cooling compartment and hence at a distance from one another. The hot-air extractor 4 is on the bottom surface 14 of the cooling compartment 2, and a portion 98 of the heated air is discharged from the cooling compartment 2 via the hot-air extractor 3, whereas another portion flows as a secondary flow 9A through the secondary flow passage 9 that is formed between the outer wall 25 and the inner wall 15. When the cooler is used with the refrigerated-goods container 20 provided for this purpose, a circulation flow 97 forms along the outer walls 22 to 25 of the refrigerated-goods container 20.
[0084] FIGS. 18A, 18B, and 18C show embodiments of the proposed cooler with at least one outlet port with edges for the passage of cool air into an upstream part of the primary flow passage. FIGS. 18A and 18B show a side view and top view, respectively, of an embodiment of a cooler with a cool-air input device 3 that has an outlet port 5 with an upper edge 5U and a lower edge 5L extending as a slot from the first edge 5X along the width y of the primary flow passage to a second edge 5Y. FIG. 18C is a top view of an embodiment of a cooler with a cool-air input device 3 that has two outlet ports 5-1 and 5-2 with edges 5X-1, 5Y-1 and 5Y-1, 5X-2, respectively, for the passage of the cool air. Something that all of the shown embodiments have in common is that a connecting line or connecting plane that extends from a respective edge facing a wall of the primary flow passage to this wall of the primary flow passage strikes this wall at an angle of α/2 (where a is no more than 35°, preferably no more than 25°, and especially preferably) 10°). The connecting line 6G (6F) that starts from the edge 5U (5L) that faces toward the inner wall 12 of the cooling compartment (the outer wall 22 of the refrigerated-goods container), strikes the inner wall 12 (outer wall 22) at an angle of no more than α/2 in position x0. The connecting line 6G (6F) that starts from the edge 5X (5Y) that faces toward the side inner wall 16 of the cooling compartment (the side inner wall 17 of the cooling compartment), strikes the side inner wall 16 (inner wall 17) at an angle of no more than α/2 in position x0. The connecting line 6G-1 (6F-2) that starts from the edge 5X-1 (5Y-2) that faces toward the side inner wall 16 of the cooling compartment (the inner wall 17 of the cooling compartment), strikes the side inner wall 16 (inner wall 17) at an angle of no more than α/2 in position x0. It is also shown in FIG. 18C that, for two respective mutually adjacent outlet ports 5-1 and 5-2, two lines or planes 6F-1 and 6G-2 that emanate from mutually adjacent edges 5Y-1 and 5X-2 of the mutually adjacent outlet ports 5-1 and 5-2, intersect in the upstream part 7 at position x0 and form an angle with one another (maximum of 35°, preferably maximum of 25°, and especially preferably maximum of) 10°). Something that all of the embodiments of FIGS. 18A, 18B, and 18C have in common is that the stream or streams for introducing cool air in position x0 in the upstream part fills or fill out the cross section of the primary flow passage transverse to the x direction completely, with the primary flow direction x experiencing no deflection in the upstream part 7 at least up to position x0. In the embodiment shown in FIG. 18C with two outlet ports 5-1 and 5-2, the cross section of the primary flow passage transverse to the primary flow direction x is filled out completely in position x0 by two mutually adjacent or overlapping flow sub-portions F1 and F2, each of which is associated with a respective outlet port 5-1 or 5-2.
[0085] FIG. 19 is a three-dimensional view of a detail of an embodiment of a proposed cooler with three outlet ports 5-1, 5-2, and 5-3. Like the embodiment shown in FIG. 18C, the cross section of the primary flow passage transverse to the primary flow direction x is filled out completely at position x0 in the upstream part by three stream sub-portions F1, F2, and F3, each of which is associated with a respective outlet port 5-1, 5-2, or 5-3, with the stream sub-portions F1, F2 and F2, F3 associated with the neighboring outlet ports 5-1, 5-2 and 5-2, 5-3, respectively, being mutually adjacent or overlapping.
[0086] FIG. 20 is another embodiment of the proposed cooler in a three-dimensional view. The cooler 1 is designed to receive a plurality of refrigerated-goods containers 20A, 20B, and 20C next to one another in the cooling compartment 2, each of which embodies a trolley provided for use in aircraft. The cool-air input device 3 is provided over the entire width (y direction) of the primary flow passage with outlet ports 5 for introducing cool air into the upstream part of the primary flow passage. In at least one position in the upstream part, and before a deflection of the primary flow direction by an inner wall of the cooler, the air streams emerging from the outlet ports 5 of the cool-air input device 3 fill out the entire width (y direction) and the entire height (z direction of the primary flow passage. The secondary flow passage preferably extends over all of the refrigerated-goods containers 20A, 20B, and 20C.
[0087] FIG. 21 is another embodiment of the proposed cooler. Unlike the embodiment shown in FIG. 1, an intermediate wall 100 is provided in the cooling compartment 2. For the purpose of forming the secondary flow passage 9 for the passage of the secondary flow, the intermediate wall 100 is provided at a distance to the outer wall 4A of the hot-air extractor 4. When the refrigerated-goods container 20 is introduced into the cooling compartment 2 and positioned therein for use in its intended storage position, the outer wall 25 of the refrigerated-goods container 20 abuts the side of the intermediate wall 100 facing away from the outer wall 4A of the hot-air extractor 4.
[0088] FIG. 22 is another embodiment of the proposed cooler. Unlike the embodiment shown in FIG. 21, an airflow guiding wall 101 is provided in the cooling compartment 7. The airflow guiding wall 101 extends in the upstream part 7 along the provided primary flow direction or in the direction of the center flow axis 5A of the introduced cool air and is adjacent to and along the upper-side wall 22 of the refrigerated-goods container 20 and opposite the inner wall 12 of the cooling compartment 2. The flow boundary 6F of the introduced cool air strikes the airflow guiding wall 101. The airflow guiding wall 101 is formed together with the intermediate wall 100 as a rectangular component bordered by the refrigerated-goods container 20 introduced into the cooling compartment 2 into a specified position with its side wall 25 and its upper-side wall 22.
LIST OF REFERENCE SYMBOLS
[0089] 1 cooler
[0090] 2 cooling compartment
[0091] 3 cool-air input device
[0092] 3K air supply duct
[0093] 3L cool air
[0094] 4 hot-air extractor
[0095] 4A outer wall of the hot-air extractor
[0096] 4B output port
[0097] 4K air discharge duct
[0098] 4L heated air
[0099] 5, 5-1, 5-2, 5-3 outlet port or port
[0100] 5A center flow axis
[0101] 5B introduced cool air
[0102] 5L, 5U, 5X, 5Y edge of outlet port
[0103] 5P port
[0104] 6 expansion angle or spread angle
[0105] 6A introduction angle
[0106] 6F, 6G flow edge or flow boundary
[0107] 7 upstream part
[0108] 8-2, 8-3, 8-4, 8-5 primary flow direction
[0109] 9 secondary flow passage
[0110] 9A secondary flow
[0111] 12,4013, 14, 15, 16, 17 inner wall of the cooler
[0112] 20 refrigerated-goods container
[0113] 21 wheel
[0114] 22, 23, 24, 25, 26, 27 outer wall of the refrigerated-goods container
[0115] 27A, 27B, 27C, 27D holding and guiding device
[0116] 46 partition
[0117] 89A, 89B port outer wall
[0118] 90, 91 screen
[0119] 97 circulation flow
[0120] 98 exhaust air
[0121] 100 intermediate wall
[0122] 101 airflow guiding wall angle
[0123] F1,15F2, F3 flow sub-area
[0124] x primary flow direction
[0125] x0 position of full air introduction
[0126] y direction of width of the primary flow passage
[0127] z direction of height of the primary flow passage
