DE19952523A1 - Cold air supply arrangement for galley service trolleys on board aircraft has jet pump in air supply line and bypass air line branching off return air line is connected to jet pump - Google Patents

Abstract

The arrangement supplies cold air to galley service trolleys that are positioned in on-board galley regions of a passenger aircraft. It has a cold machine (1) to which an air supply line (2) is connected via which the supply of at least one galley service trolley with cold air is implemented. A return air line (3) implements the return of the warmed-up cold air from the trolley to the cold machine. A jet pump (9) is installed in the cross-section of the air supply line and at the same time, a bypass air line (4) which is a branch off the return air line, is connected to the jet pump.

Description

The invention relates to an arrangement for supplying cooling air to kitchen service trolleys (Trolleys) that are positioned in the galley areas of a passenger aircraft. Your application lies in the area of increasing the efficiency of an existing cooling system in aircraft for cooling of food or luxury goods in galley areas.

Aviation is used to take care of accompanying passengers in a passenger plane Appropriate food and drinks are offered in the kitchen service trolleys, which serve the galley are set, stored. To cool the food and luxury food is in a closed Cold air either through the entire cold room with the kitchens positioned there service trolley (Trolley Compartment) or at least by a single kitchen service trolley headed. The air flow (discharged into the cooling circuit) is from a compression refrigerator (Air Chiller) cooled and in pipe connections to which the trolley compartment (the kitchens service trolley) is (are) fed, whereby the heated return air delivered there Chiller is recycled.

Accordingly, it is known that the galley area (s) [galley area (s)] of a passenger aircraft supplied with cold air from a chiller via a pipeline (supply pipe) will (are) there to wash or rinse the kitchen service trolleys to be cooled (trolleys) is needed. Otherwise, the cold air (warmed up by the kitchen service trolleys) becomes hot then returned to the chiller via a pipe (return pipe).

No model is known to date, according to which suitable measures are proposed that Cooling capacity of the compression refrigeration machine without increasing its air flow in the passenger plane to increase the supply of an galley with an expanded number of Kitchen service trolley (trolley compartment) when the average cooling temperature is reduced to ensure.

Accordingly, the object of the invention is to provide an arrangement for supplying cooling air Kitchen service trolleys, which are arranged in the galley areas of a passenger aircraft, Specify the cooling capacity of a compression refrigerator that an existing one Cooling system is integrated, without increasing their air flow rate can increase (influence efficiently).

This object is achieved by the measures specified in claims 1 and 3. In the Further claims are appropriate further developments and refinements of these measures specified.

The invention is closer in one embodiment with reference to the accompanying drawings described. Show it

Figure 1 shows the pipeline course of a known arrangement for cooling air supply for kitchen service trolleys of a single trolley compartment in a passenger plane.

FIG. 2 shows the front view of the trolley compartment (without a pipe run) according to FIG. 1;

FIG. 3 shows the decorated with jet pumps pipe run an improved arrangement for cooling-air supply of two three Food Service Cart equipped trolley compartment in a passenger aircraft;

Fig. 4 is a side view of an individual (the trolley compartment integrated) Food Service trolley (Single trolley) of FIG. 3;

5 shows the supplemented with a jet pump piping layout of an improved arrangement for cooling supply air by a multiple (- after 6 - five.) Equipped Food Service Cart trolley compartment in a passenger aircraft.

Fig. 6 is the front view of the multi-Food Service Cart equipped trolley Compartment (without pipe run) in a passenger aircraft of FIG. 5;

Fig. 7 shows the supplemented jet pump and provided at the rear of the trolley compartment with an air distributor bridge unit pipe run an improved arrangement for cooling-air supply of two three Food Service Cart equipped trolley compartment in a passenger aircraft;

Fig. 8 is a side view of a single [the single trolley compartment - according to Fig. 7 -) integrated] kitchen service trolley (single trolley) with an air distribution bridge unit.

The arrangement shown in FIG. 1 for supplying cooling air to a cold room (single trolley compartment 13 ) in a passenger aircraft sells to the person skilled in the art the pipeline circuit diagram known to him with the kitchen service trolleys connected (not shown in the figure) to a refrigerator 1 (air chiller). From FIG. 2, too - with the exception of equipping the trolley compartment 13 with three kitchen service trolleys 7 - he will hardly discover any further information.

Only with Fig. 3 will one discover innovative details with which an existing cooling system in the cooling of food and (possibly also) luxury goods in the (in) galley area (s) of a modern passenger aircraft will be improved in an efficient manner. Two cold rooms with set kitchen service trolleys 7 - so-called (hereinafter referred to) trolley compartments 13 - are presented, to which a different number of kitchen service trolleys 7 is positioned. These kitchen service trolleys 7 are connected to a refrigeration machine 1 (air chiller) by means of (differently designated and as) pipeline connections (line connections made). They are supplied by an air supply (main) line 2 with cold air (cold-tempered supply air), which is discharged from the kitchen service trolleys 7 (trolleys) as heated cold air (heated return air) after the supply areas have been flushed or flushed (by absorbing heat from this supply air) and is fed via a return air (main) line 3 to the mentioned refrigerator 1 . This known procedure correlates with the usual measures with regard to FIGS. 1 and 2, with which no increase in the cooling capacity of the refrigerator 1 - because the temperature (stroke) and the amount of air determine the power (upper) limit - can be implemented. The improvement (s) in existing cooling systems is (become) clear with a jet pump 9 installed in addition to the pipe cooling system and the line supplements (and / or changes) that are important for their function for the purpose of increasing the efficiency of the existing cooling system.

With a digression to an arrangement (not shown in the figure), it is generally noted - for a better understanding - that - starting from the (usual) arrangement for cooling air supply shown in Fig. 1, a (presumably only one) kitchen service car (s) 7 , which is positioned in the galley areas of a passenger aircraft, a trolley compartment 13 , which connects it to a refrigerator 1 via pipeline connections. The cooling machine 1 is connected to an air supply line 2 , via which the supply of the conventional kitchen service car 7 with cold air is realized, and a return air line 3 , which realizes the return of the heated cold air discharged from the kitchen service car 7 to the cooling machine 1 . In addition, as a feasible first variant, the jet pump 9 mentioned is installed in the line cross section of the air supply line 2 . The latter is sensibly represented with an angled (pipe) line part. The latter consists of two angled pipe halves, a suction pipe and a propulsion jet pipe, which are connected to each other. The propellant jet pipe of this (type) jet pump version should (later) be arranged to run straight in the direction of the pipe axis of the air supply line 2 . In order to achieve the desired purpose of the return air pipe is branched off 3 is a (so-called) bypass air conduit. 4 The suction pipe of this jet pump version, which is led through the air supply line 2 (to the outside of the line wall), is connected to the bypass line 4 .

This ensures that a suction effect is initiated by the kinetic energy of the propellant jet of the cool supply air supplied by the refrigerator 1 (by the air chiller) near the free end of the propellant jet pipe, which is arranged in the open cross section of the air supply line 2 , in the open cross section of the propellant jet pipe , whereby portions of the heated cold air (discharged from the kitchen service trolley 7 ) are drawn off into the air supply line 2 via the bypass line 4 and the suction pipe. As a result, better utilization of the refrigeration machine 1 is achieved, as a result of which the cooling air transport is regulated - to a desired (acceptable) volume throughput (below the cooling capacity limit) - or vice versa, an additional one (if not at the level of - of the refrigeration machine 1) air volume (the cold air flowing through the air supply line 2 ) can be regulated.

Another embodiment of the jet pump 9 , to which reference (frequently) is made in the following, is generally illustrated by other measures that deviate from the previously (generally described) arrangement with regard to the implementation of a jet pump 9 . . Here, the reference is to the embodiment shown in Figure 1 (conventional) arrangement for cooling-air supply of a (angenom menermaßen only single) Food Service Cart (s) 7, the aircraft in the galley areas of a passenger a trolley compartment 13 is positioned - which one Ungen about Rohrleitungsverbind connects to a refrigerator 1 , maintained. The refrigeration machine 1 is also connected to the air supply line 2 mentioned, via which the normal kitchen service car 7 is supplied with cold air, and a return air line 3 , which realizes the return of the cold air heated by the kitchen service car 7 to the cooling machine 1 . Only in this generally specified embodiment will no jet pump 9 (designed with an angled pipe part) of the type previously described be installed in the line cross section of the air supply line 2 .

Instead, another feasible second variant (in contrast) is that a jet pump 9 is implemented in the line cross section of a pipeline that supplies cold air (cold supply air) from the refrigerator 1 . Here, the jet pump 9 with an air supply air line 21 , an air supply connection line 22 , which is connected to the latter, and the bypass air line 4 mentioned , which is connected to the air supply line 21 . The air supply supply air line 21 (connected to the refrigerator 1 ), which is branched off from the air supply (main) line 2, and the air supply connection line 22 (connected to the individual kitchen service trolley 7 ) are (more simply) divided by the air Supply line 2 implemented in two line sections. However, such line sections can also be designed separately, which - according to the model in FIG. 3 - the air supply line 2 or the refrigerator 1 are connected. A line end section 8 of the air supply supply air line 21 is guided into the open line cross section of the air supply connection line 22 . The bypass air line 4 is (as previously had) branched off the return air line 3 and the air supply connection line 22 is closed.

It goes without saying that these air-carrying line connections (and also all the others Connections of this type) as pipeline connections.  

Returning to FIG. 3, the jet pump 9 will be implemented in such a way that the connecting end region 5 (the free pipeline end not connected to the kitchen service trolley 7 ) of the air supply connecting line 22 is formed in a funnel shape. In the open funnel cross-section of a funnel (having a frustoconical shape) of the air supply connection line 22 , which represents a so-called connecting end region 5 of the air supply connection line 22 , a line end section 8 (better: a pipe end section of the unconnected free pipe end) is inserted (through the base area of the truncated cone). the air supply supply air line 21 in the direction of the line axis of the air supply connection line 22 . In addition, the bypass air line 4 , which branches off an exhaust air connection (pipe) line 14, which is connected to the individual kitchen service trolley 7 and the convenient return air line 3 , is connected to the funnel edge of the connection end region 5 , with which the funnel opening (the open funnel cross section) is closed. According to the embodiment, the bypass line 4 is connected sideways (at an opening in the cone jacket) below the funnel opening.

With this measure it is achieved that - similar to the mode of operation of the jet pump 9 installed with an angled pipe part - by the kinetic energy of the propulsion jet of the cold air (cold supply air) supplied from the refrigerator 1 (from the air cooler) via the air supply supply line 21 in the un Indirect inner funnel environment near the free end of the (pipe) line end section 8 of the supply air supply supply air line 21 , which is arranged in the open funnel-shaped cross section of the connecting end area 5 of the air supply connection line 22 , a suction effect is initiated, whereby partial quantities of (from the kitchen service trolley 7 ) discharged heated cold air can be sucked off via the bypass line 4 into the interior of the funnel. This will - as desired - relieve the chiller 1 , thereby regulating the cold air transport - to a desired (acceptable) volume throughput (below the cooling capacity limit) - or vice versa, an additional one (if not at the level of the chiller) 1 released - cooling temperature) air volume (the tempered cold air flowing through the bypass line 4 ) can be regulated.

According to FIG. 3, two trolley compartments 13 with different numbers of kitchen service trolleys 7 positioned in this cooling area are connected to the air supply line 2 via the aforementioned pipeline route. Regardless of the intention to set up three kitchen service trolleys 7 within a first trolley compartment 13 and two kitchen service trolleys 7 within a second trolley compartment 13 , their connection to the refrigerator 1 - in individual cases (if necessary) - (generally) via a plurality of supply air connecting lines 14 connected to them and a plurality of air supply connecting lines 22 branched off from them are realized with the latter individually connected air supply supply air lines 21 .

The exhaust air connecting lines 14 connected to the kitchen service trolley 7 are connected to the return air line 3 , the air supply supply air lines 21 of the air supply (main) line 2 being connected.

For this reason, each of the individual exhaust air connection lines 14 will branch off from a bypass air line 4 , which is connected to the funnel-shaped connecting end region 5 of the air supply connection line 22 . This route will probably only be provided for special (unavoidable) measures, e.g. in the case of repairs.

A much more elegant solution is the installation of a so-called air distribution bridge unit 6 , which is arranged on the rear walls of the kitchen service trolleys 7 , which are usually positioned next to one another. Such an air distributor bridge unit 6 consists of a so-called supply air distributor rail 10 and a return air distributor rail 11 , each of which consists of a pipeline provided with a plurality of pipe connections. In the present application, it is seen that the supply air distribution rail 10 branches off individual supply air supply branches 23 , which are connected to the kitchen service car 7 in question. The cold air supply (provided here) is supplemented with a connection of the supply air supply connection line 22 to the supply air distribution rail 10 via the above-described pipeline route (line connection: supply air supply supply line 21 with the supply air supply connection line 22 connected to it ). Same sam this measure, the return air distribution rail 11 individual return air derivatives 24 , which are designed as pipe connections, branched off, which - according to the aforementioned model - a single exhaust air connection line 14 is connected, which is connected to the return air (main) line 3 ver. The branching of the bypass line 4 from the exhaust air connection line 14 and their connection to the funnel-shaped line end section 8 of the supply air supply supply air line 21 is implemented according to the model also mentioned.

With these measures, it is possible to add more kitchen service trolleys 7 [in theoretically any number and at different locations, possibly within several galley areas, whereby it would be conceivable that, for example, in a multi-day, large aircraft, one galley area with a number of positioned kitchen service trolleys 7 would be seen per floor ,] to the air supply line 2 and the return air line 3 in order to supply them with cold air obtained from the refrigerator 1 and to return partial quantities of the heated return air they emitted to the refrigerator 1 (for processing). The remaining portions of the heated cold air transferred via the bypass air line (s) 4 are added to the volume flow of the cold air (via the relevant air supply supply line 21 ) via the specified jet pump design for the stated purpose. The number of supply air branches 23 and return air ducts 24 depends on the number of kitchen service trolleys 7 positioned for the trolley compartment 13 concerned .

For this purpose, the side view of a single Food Service Cart 7 (a so-called single trolley) with the affiliated Zuluftversorgungs-branch 23 and return air line 24 shown in Fig. 4.

The supply of a single trolley compartment 13 according to FIG. 5, which, according to the embodiment shown in FIG. 6, is equipped with five kitchen service trolleys 7 , is reminiscent of the general implementation already described with one of the connecting elements: air supply supply air line 2 , air supply -Connection line 22 and bypass air line 4 at the junction converted jet pump 9th The supply of the trolley compartment 13 (or the five kitchen service car 7 according to the correlating representation from FIG. 6) with cold air will take place via the individual (supply air supply line 2 connected) air supply supply air line 21 , from there at the junction point mentioned Air supply connection line 22 corresponding subsets of the heated cold air returned from the individual kitchen service car 7 are supplied via the conventional bypass air line 4 in order to use the jet pump 9 formed for the intended purpose via the bridge unit 6 (not shown in the figure) to provide the relevant kitchen service car 7 ( to supply to Fig. 6) with sufficient cool tempered air. In addition, FIG. 5 indicates the return of parts of the used cabin air vented from an aircraft passenger cabin, which is supplied to the refrigerator 1 (for reasons of the waste heat management - not dealt with in more detail) via a provided connection - a cabin air inlet. Likewise, the delivery of portions of air heated in the refrigerator 1 (during the cooling process) is indicated (condenser air).

In Figs. 7 and 8 is a further modification of the arrangement for cooling-air supply for Food Service trolley 7, which are positioned 13 a trolley compartment presented. According to this arrangement, a modified version of the conventional jet pump 9 and its integration into the bridge unit 6 cited is presented. It is then provided that, according to FIG. 7 (in contrast to the embodiment according to FIG. 3), the supply air distributor rail 10 (on the back of the kitchen service trolleys 7 of a trolley compartment 13 positioned next to one another) is connected to a separate supply air connection line 15 which connects the air supply line ( 2 ). is directly connected. This supply air distributor rail 10 is branched off several air supply supply air lines 21 , the line (pipe) end section 8 (according to the model shown in FIG. 3) in the open cross section of the (also here) funnel-shaped connection end region 5 of the individually connected air supply -On line 22 is guided. The latter is connected to an individual (also presented with regard to FIG. 3) to air supply branch 23 , to which the individual kitchen service trolley 7 is connected. In addition (also here: on the back of the kitchen service trolleys 7 of a trolley compartment 13 positioned next to one another) an air supply rail 10 is installed, which (according to the model in FIG. 3) is connected to a separate exhaust air connection line 14 . The latter is the return air (main) line 3 - as before - directly connected. The return air distribution rail 11 are a plurality of return air outlet lines 16 branched. The individual return air outlet line 16 is each connected to a return air outlet line 24 which is connected to the kitchen service trolley 7 concerned.

The number of line connections made with pipelines (according to FIG. 7, the lines designated as air supply air supply line 21 , air supply connecting line 22 , supply air supply branch 23 , return air discharge line 24 and also return air discharge line 16 , bypass air line 4 ), which are directly connected to the relevant trolley compartment 13 (according to FIG. 7: two trolley comparisons 13 ) connected by air rails, is determined by the number of kitchen service trolleys 7 positioned for an individual trolley compartment 13 . By directly connecting the air rail in question to the air supply line 2 (for cold air supply) or to the return air line 3 (for returning the heated cold air), only one pipe connection is provided.

This measure can also largely be carried over to the explanations according to FIGS. 3 and 5, although - due to the different solution concepts - one or the other line is considered differently on the execution side or is completely omitted.

In addition, FIG. 8 also shows the side view of an individual kitchen service trolley 7 (a so-called single trolley) with the supply air branch 23 connected to it and the return air discharge line 24 (correlating with the connection technology presented with regard to FIG. 7) and the technological implementation the jet pump 9 shown.

Further additional considerations pursue the purpose of promoting the understanding of the technology presented for cooling air supply for kitchen service trolleys 7 (trolleys) in the galley areas of a passenger aircraft.

In order to clarify the special advantages of the cooling technology described (if not yet happening), it is discussed that with the differently differing designs of the arrangement for supplying cooling air for kitchen service trolleys 7, it is possible to achieve a cooling performance (according to FIGS. 1 and 2) traditionally connected chiller 1 (an air chiller). The supply of a galley with a larger number of trolleys (according to FIGS. 3, 5 and 7), which is forecast in future multi-deck, wide-body (passenger) aircraft, is therefore likely. The temperature in the relevant trolley compartment 13 will be able to be reduced on average from previously seven degrees Celsius to four degrees Celsius. In addition - according to this technology - no increase in the air throughput of an air chiller is expected.

Using the provided jet pumps 9 after

• a) of the general type described above (with an angled pipe part) or
• b) the specified jet pump design (with a bypass connected to the open cross section of a funnel-shaped connecting end region 5 of the air supply connecting line 22 , a line end section 8 of the supply air supply supply air line 21 and the funnel edge of the connecting end region 5 )

a partial air flow is generated in the cooling circuit and thus the injection volume of the connected Trolley compartments

13

increased in relation to the air flow rate of an air chiller. The cooling performance will be directly proportional to the injection volume while maintaining the minimum injection increase temperature from zero degrees Celsius. With the supply of two on-board kitchens already Air Chiller flexible - taking advantage of a cheap parking space in terms of minimizing the pipe Conduction losses between the Air Chiller and the galley while preventing direct heat inflow from the secondary circuit in the cabin area (of the passenger plane) - arranged become. A jet pump used in this way

9

will work without mechanical drive. Latter is taken into account in the presented versions as a functionally reliable and weight-saving means carefully to achieve the desired purpose.

In order to obtain these effects, which are advantageous for a cooling system in aircraft construction, the suction jet of heated cold air (leaving the individual kitchen service trolleys 7 ) is switched by the use of the conventional jet pump 9 according to FIGS . 3 and 5, which flows with the driving jet of the cold air of the refrigerator 1 (of the air chiller) is mixed to the trolley compartment 13 . The jet pump 9 operates - as previously indicated - according to the injector principle, the static pressure energy of the propellant jet of the cold air (supplied by the air chiller) being converted into kinetic energy, which is then heated by impulse transmission during mixing to the suction flow of the (returned from the trolley) Cold air is emitted, whereby a homogeneous mixing temperature of the supply air supplied to the trolley will result. This embodiment ensures that the cooling flow (produced by the Air Chiller) is kept at the previously known level of approximately 200 l / s, while the total air flow for the trolley compartments 13 is increased. With the design of the jet pump 9 , the ratio of suction flow / drive flow is fixed, so that the suction flow changes proportionally with a change in the drive flow. The distribution of the air flows takes place, on the one hand, via the design data of the jet pump 9 and, on the other hand, via a calibration of the (previously not mentioned) orifices 17 , 18 , which are set accordingly after equipping the individual galley with kitchen service trolleys 7 (trolleys). These diaphragms 17 , 18 are inserted into the pipeline cross section of the relevant air supply supply air line 21 (according to FIG. 3) or of the supply air connection line 15 (according to FIG. 7). The outlet temperature of the refrigerating machine 1 is lowered so that the mixing temperature (of the supply air flowing through the air supply connection line 22 as the minimum blowing-in temperature into the relevant trolley compartment is 13 +/- 0 degrees Celsius.

It represents the lower temperature limit in order to keep the food to be cooled in the kitchen service trolley 7 frost-free. On the basis of the design criteria described, the mixing temperature (of the supply air flowing through the air supply connection line 22 ) and the blowing-in temperature (of the supply air flowing through the supply air supply branches 23 in the kitchen service trolley 7 ) are averaged via a control (not explained in more detail) kept at +/- 0 degrees Celsius. In practice, it will be practical to arrange (implement) the jet pump 9 in the (near) area of the relevant trolley compartment 13 in order to keep the mixed air-carrying pipelines as short as possible and thus also to achieve low pressure losses over the pipeline length. This measure also applies accordingly to the route sections from the refrigerator 1 to the effective range of the (converted) jet pump 9 , generally the separation or merging node of the individual air streams. In Fig. 6 (in correlation of Fig. 5) the example of a galley with a larger number of kitchen service cars 7 is shown, which are supplied with cold air by a refrigerator 1 . The principle of operation of this arrangement corresponds to that described above, with no aperture calibration (corresponding to the measure mentioned above) being provided. By using the jet pump 9 , the air throughput of the cold air discharged from the refrigeration machine and thus the blowing jet of cold air flowing through the air supply supply air line 21 can be reduced, while the blowing quantity flowing through the air supply connection line 22 into the supply air flowing into the trolley compartment 13 Depending on requirements, the volume-related proportion of the partial air quantity of heated cold air drawn in via the bypass supply air line 4 is increased. This means that the ratio of suction flow (the heated cold air) to drive flow (the cold air supplied) is redefined. Due to the low air throughput of the cold air (supplied by the refrigeration machine 1 ) in the corresponding route sections (the pipeline installation), either the pressure losses or the pipeline cross sections and thus the weight (of the aircraft) can be reduced. For the practical application, the system components: refrigeration machine 1 , pipeline section that can be laid including jet pump 9 and trolley compartment 13 must be coordinated and optimized. According to FIG. 7 (and in correlation with FIG. 8) it is provided that a maximum number of jet pump devices [devices with (converted) jet pumps 9 ] are permanently installed on the rear wall of the galley (more precisely: the kitchen service car 7 ) So that the latter activate the - quantitatively very demand-dependent - equipped galley area for cooling the equipped single trolleys (according to FIG. 8) the galley is equipped with a trolley compartment 13 , then the entire compartment is connected directly via the air supply (main) line 2 Supply air connection line 15 supplied with cooling air. The number of jet pumps 9 will therefore depend on the size of the galley (s) and thus on the maximum number of parking spaces available for the kitchen service car 7 . The supply air (the driving current of cold air) to the jet pumps 9 and the exhaust air (return air) of heated cold air from the individual trolleys or the (relevant) trolley compartment 13 , which flows to the refrigerator 1 , is in each case via the air distribution rails mentioned, which are located near the floor of the kitchen area. These air distribution rails are rationally connected to the pipes of the refrigerator 1 by means of quick-release fasteners.

By implementing such measures, certain advantages are achieved, according to which one can provide jet pump devices considered in this way near the galley back wall as an integral part and thus independent of the aircraft-side installation conditions. Because the air throughput per trolley compartment 13 is defined by the desired cooling capacity, this results in structural simplifications for the dimensioning of the individual jet pump 9 , which are then generally defined once and used for each jet pump device. In the service area, increased flexibility is achieved for the aircraft operator, since the effort for adaptation and post-calibration with variable trolley occupancy is reduced to a minimum and each trolley space can be supplied with cold air.

Finally - based on the two types of jet pump 7 [according to variants a) and b)] - it is mentioned that instead of the jet pump 7 mentioned several times, a (controllable) blower (a suction fan) can of course also be used, which (the ) - is then installed within the pipe cross-section of the bypass air line 4, to suck in and around a portion of the recycled from (the) food service cart 7 heated cold air via the bypass (volume-controlled) - based extent to Figures 3, 5, 7 and 8. FIG. then introduce the blown air quantity (the suction flow of heated cold air) to the cold air supplied from the refrigerator 1 . In this embodiment, the bypass air line 4 would be (directly) connected to the air supply line 2 or the air supply connection line 22 .

reference numeral

1

Chiller

2nd

Air supply line

21

Air supply supply air line

22

Air supply connection line

23

Supply air branches

24th

Return air discharge

3rd

Return air line

4th

Bypass air line

5

Connection end area (the air supply connection line

22

)

6

Bridge unit

7

Kitchen service trolley

8th

Line end section (the supply air supply supply air line

21

)

9

Jet pump

10th

Supply air distribution rail

11

Return air distribution rail

12th

Return air discharge

13

Cold room - with kitchen service trolley

7

(Trolley compartment)

14

Exhaust air connection line

15

Supply air connection line

16

Return air outlet line

17th

,

18th

cover

Claims (14)

1. Arrangement for supplying cooling air for kitchen service vehicles, which are positioned in the galley areas of a passenger aircraft, with a refrigeration machine ( 1 ) which has an air supply line ( 2 ) via which the supply of at least one kitchen service vehicle ( 7 ) with cold air is realized, and a return air line ( 3 ), which realizes the return of the cold air warmed by the kitchen service trolley ( 7 ) to the chiller ( 1 ), characterized in that a jet pump ( 9 ) is installed in the line cross section of the air supply line ( 2 ), thereby a bypass air line ( 4 ), which branches off the return air line ( 3 ), the jet pump ( 7 ) is connected. 2. Arrangement according to claim 1, characterized in that the jet pump ( 7 ) is realized with an angularly bent line part, the driving jet pipe in the direction of the line axis of the air supply line ( 2 ) is arranged straight, and the bypass air line ( 4 ) one connected to the driving jet pipe suction pipe of the angularly bent line part, which is guided through the wall of the air supply line ( 2 ). 3. Arrangement for supplying cooling air for kitchen service vehicles, which are positioned in the galley areas of a passenger aircraft, with a refrigeration machine ( 1 ) which has an air supply line ( 2 ) via which the supply of at least one kitchen service vehicle ( 7 ) with cold air is realized, and a return air line ( 3 ), which realizes the return of the cold air warmed by the kitchen service ( 7 ) to the chiller ( 1 ), characterized in that a jet pump ( 9 ) is installed in the line cross section of the air supply line ( 2 ), which consists of a with the Refrigerator ( 1 ) connected Luftver supply air line ( 21 ) and one with the kitchen service trolley ( 7 ) connected Luftver supply connection line ( 22 ), which is implemented by dividing the air supply line ( 2 ) into several line sections, a line end section ( 8 ) the air supply air supply line ( 21 ) in de n open line cross section of the air supply connection line ( 22 ) is guided and a bypass air line ( 4 ) which branches off from the return air line ( 3 ), the air supply connection line ( 22 ) is connected. 4. Arrangement according to claim 3, characterized in that the air supply line ( 2 ) is branched off separately the air supply supply air line ( 21 ) and the individual kitchen service ( 7 ) the air supply connection line ( 22 ) via which the transport of cold air is implemented , is connected, wherein a funnel-shaped connecting end portion ( 5 ) of the air supply connection line ( 22 ) in the open funnel cross section of the line end section ( 8 ) of the air supply supply air line ( 21 ) is guided in the direction of the line axis of the air supply connection line ( 22 ) , the bypass air line ( 4 ), which branches off the return air line ( 3 ) or an exhaust air connection line ( 14 ) connected to it and the kitchen service trolley ( 7 ), is connected to the funnel edge of the connection end area ( 5 ), with which the funnel opening is closed by the latter is. 5. Arrangement according to claim 1, characterized in that the air supply line ( 2 ) is separately branched a supply air connection line ( 15 ) which is connected directly or via a supply air distributor rail ( 10 ) to the kitchen service trolley ( 7 ), which is connected directly to the kitchen service trolley ( 7 ) the jet pump ( 9 ) is installed, the transport of cold air to the kitchen service trolley ( 7 ) being implemented via this type of line connection. 6. Arrangement according to claims 1 and 5, characterized in that the driving jet pipe of the jet pump ( 9 ) is arranged in the open cross section of the supply air connection line ( 15 ) extending straight in the direction of the line axis. 7. Arrangement according to one of claims 1 to 5, characterized in that the Luftver supply line ( 2 ) a plurality of kitchen service trolleys ( 7 ) are connected, the connection of which is branched off via a plurality of supply air connecting lines ( 15 ) or a plurality of branched supply air supply lines ( 21 ) and with the latter individually connected air supply connection lines ( 22 ) is realized, with the kitchen service trolley ( 7 ) individually connected exhaust air connection lines ( 14 ) being connected to the return air line ( 3 ). 8. Arrangement according to claims 1 to 4 and 7, characterized in that the individual exhaust air connection line ( 14 ) each has a bypass air line ( 4 ) which is connected to the suction pipe of the angularly bent line part or the funnel-shaped connecting end region ( 5th ) the air supply connection line ( 22 ) is connected. 9. Arrangement according to one of claims 1 and 3, characterized in that on the rear walls of a plurality of kitchen service trolleys positioned next to one another ( 7 ) an air distributor bridge unit ( 6 ) is arranged, which consists of a supply air distributor rail ( 10 ) and a return air distributor rail ( 11 ) is formed. 10. Arrangement according to claims 1 to 5 and 9, characterized in that the supply air distribution rail ( 10 ) with the separate supply air connection line ( 15 ) or with one of the air supply supply air line ( 21 ) and the air supply connection line connected to it ( 22 ) Composite line connection, which is connected to the air supply line ( 2 ), wherein the supply air distribution rail ( 10 ) branches off several supply air supply branches ( 23 ), which are individually connected to the kitchen service trolley ( 7 ). 11. Arrangement according to claims 1 to 5 and 9, characterized in that the return air distribution rail ( 11 ) with the separate exhaust air connection line ( 14 ) which is connected to the return air line ( 3 ) is connected, with several of the return air distribution rail ( 11 ) branched off Return air discharge lines ( 24 ) are connected to the kitchen service trolley ( 7 ) individually, in each case branching off from the exhaust air connection line ( 14 ) is a bypass air line ( 4 ) which is connected to the suction pipe of the angularly bent line part or the funnel-shaped connecting end area ( 5 ) the air supply connection line ( 22 ) is connected. 12. Arrangement according to claims 1 to 5 and 9, characterized in that the supply air distribution rail ( 10 ) with the separate supply air connection line ( 15 ), which is connected to the air supply line ( 2 ), the supply air distribution rail ( 10 ) being several are abge branched air supply air supply lines (21) and individually with the latter connected to air supply leads (22) are connected, besides the air supply leads (22) ver Thematic Zuluftversorgungs-branches (23) joined is the single Food service trolley (7). 13. Arrangement according to claims 1 to 5 and 9, characterized in that the return air distribution rail ( 11 ) with a separate exhaust air connection line ( 14 ) which is connected to the return air line ( 3 ), wherein the return air distribution rail ( 11 ) several her Return air discharge lines ( 16 ) are branched, each of which is connected to a return air discharge line ( 24 ), which is individually connected to the kitchen service trolley ( 7 ), at the connection point of the return air discharge line ( 24 ) with the return air discharge line ( 16 ) the bypass air line ( 4 ) is branched off, which is connected to the funnel edge of the connecting end region ( 5 ) of the individual air supply line ( 22 ). 14. Arrangement according to claims 1 or 3, characterized in that the jet pump ( 9 ) is replaced by a blower which is installed in the line cross section of the bypass air line ( 4 ), the bypass air line ( 4 ) of the air supply line ( 2 ) or the air supply connection line ( 22 ) is connected.