DE202018101200U1 - Serving - Google Patents

Abstract

A self-contained refrigerated trolley (10) adapted for cooling beverages or meals, comprising: an interior space (12) for receiving beverages or food to be cooled; a coolant receiver (50) for receiving a refrigerant (64) adapted to release refrigeration into the interior of the refrigerated serving cart, a thermoelectric element (62, 63, 63 ', 63b) for generating electrical energy from at least a portion of the refrigerant discharged from the refrigerant.

Description

Field of the invention

The invention relates to a trolley especially for use on board an aircraft and a cooling system for use in a trolley.

Background and general description of the invention

Serving trolleys have been used since the beginning of commercial aviation to carry passengers to serve food and drinks during the flight. Nowadays they are being moved in quantities of hundreds of thousands worldwide, because a multiple of service trolleys is kept ready per aircraft to be pre-dispatched with the respective flight into the aircraft. On the ground, the trolleys are prepared after the flight to be refilled for the next flight.

The food and drinks are sometimes loaded hours or days before use in the plane in the trolley. It is known to cool the food and drinks stored in the trolley until loading the trolleys. For this purpose, trolleys may be adapted to be connected to external stationary cooling devices. External quasi-stationary cooling devices can also be installed on board an aircraft, with the serving trolley being connected to the cooling device. Such external cooling devices is disadvantageous in that only special trolleys can be used, which are prepared for connection to an external cooling device. Furthermore, the lack of flexibility is disadvantageous to these external cooling devices, since the trolleys must be stationarily connected to the cooling device in order to ensure a cooling effect.

It is also known and widely used to provide trolleys with a temporary refrigerant, such as dry ice, for intercooling the trolleys for the time from on-ground removal to deployment on board the aircraft. For this purpose, known dry ice drawers are used. This system is disadvantageous in that the dry ice produces a very uneven distribution of cold in the interior of the trolley, since the immediate area around the dry ice and dry ice drawer is strongly cooled, sometimes well below freezing point, which may be undesirable, the more distant area of the interior the trolley, on the other hand, does not reach much cold.

A modern trolley is standardized in its dimensions to the millimeter, every possible space is exploited to provide maximum possible volume for accommodation of food and drinks at the lowest possible weight. The standardization also serves the inter-manufacturer interchangeability, for example, the containers can be arranged in the interior, so that any deviations of the interior in width or depth are practically not enforceable in the market.

Comparable fields of application are everywhere where food and drinks to be cooled are to be kept ready for a large number of persons in a small space, for example in ships such as in particular cruise liners, in trains, but also in stadiums and the like.

The invention is therefore based on the object to provide a trolley, which is able to cool food and drinks in the interior temporarily and causes an improved distribution of cold in the interior, in particular without reducing the valuable available for food and drinks interior of the trolley ,

The invention has also set itself the task of providing improved cooling so that even while maintaining the cooling function, a self-sufficient operation is ensured and not external sources such as cooling or electrical energy must be used, this possibly also as a retrofit solution for existing Trolley.

In particular, the invention has the object to provide a trolley, which can be used independently of external sources such as external cooling or external power supply.

The object of the invention is solved by the subject matter of the independent claims. Advantageous developments of the invention are defined in the subclaims.

In the following, an independent refrigerated serving trolley is presented, which is prepared for cooling drinks or food. The self-sufficient refrigerated serving trolley has an interior for holding drinks or food to be cooled. The interior occupies the major part of the volume of the refrigerated serving cart. In one embodiment, the interior space may be divided into different subareas, e.g. a partial area to be cooled and a partial area which can not be cooled or heated.

The refrigerated serving trolley comprises a coolant receptacle for receiving a coolant which is prepared for emitting cold into the interior of the refrigerated serving trolley. In the coolant intake can be a dry ice drawer, which is preferably located in the upper part of the refrigerated serving cart so that it is easily accessible for the filling and can also be arranged locally separated from the food. It is particularly advantageous that the coolant intake is accessible from the outside and thus filled, even if the interior has already been filled with food and drinks and the door was sealed. However, the coolant intake can also be located on the underside of the refrigerated serving trolley or arranged centrally. Possibly. For example, the refrigerated trolley may include upper and lower doors and the coolant receiver may be centrally located therebetween. The central arrangement is advantageous if both food or drinks are to be accommodated in only one refrigerated serving trolley, which are to be cooled, and at the same time food or drinks that require no cooling or should even be kept warm. The central arrangement can cause a separation of the temperature ranges in this case.

The cooling trolley according to the invention further comprises a thermoelectric element for generating electrical energy from at least a portion of the released from the coolant cold. In other words, the thermoelectric element is operated with energy from the coolant. The given by the coolant cold - physically is the absorption of heat, especially from the interior of the refrigerated serving cart, so the absorption of thermal energy - not only cools the interior of the refrigerated serving cart from. Rather, the use of coolants in refrigerated trolley is lossy. The little isolated because of the confined space Trolley returns the cold to the environment again, this above the coolant intake and located close to the coolant outer surfaces of the refrigerated serving trolley. In the case of the upper portion coolant intake, e.g. a dry ice drawer, this is the top of the refrigerated utility cart which emits a greater portion of the refrigerant's cold. This top is designed as a shelf on which typically a complete container can be placed in order to facilitate the operation of the passengers. It has been noticed by the inventors that this upper tray is treated extremely harshly under conditions of use by dropping heavy containers onto this upper tray without deceleration. This upper shelf is therefore at least outside accordingly robust perform to meet these conditions of use. The use of metals shows the required robustness, however, metals are known to have a high thermal conductivity, so that the heat can quickly diffuse from a coolant arranged adjacent to a correspondingly shaped filing.

The thermoelectric element can now preferably be arranged such that a part of the refrigerant escaping from the coolant into the environment surrounding the refrigerated serving trolley passes through the thermoelectric element. In other words, the thermoelectric element is placed just where most of the lost cold escapes. It has been shown that an arrangement below the upper shelf is particularly suitable for this purpose. In this arrangement, the thermoelectric element of the harmful effect of improper treatment from the outside by the example in metal (in aluminum or steel or the like.) Executed tray protected at the same time the thermoelectric element improves the insulating effect by the direct contact of the upper tray with the air surrounding the coolant decreases. Nevertheless, the escaping refrigerant flow passes through the thermoelectric element.

The self-sufficient refrigerated serving trolley may further include a distribution system for distributing the refrigeration of the refrigerant in the interior of the refrigerated serving trolley by means of a cooling fluid, the distribution system being adapted to obtain the electrical energy needed for the movement of the cooling fluid from the thermoelectric element. In other words, the thermoelectric element generates power for operating the distribution system by means of the "cooling", ie the loss of cold. By means of the distribution system, the cold of the coolant can be distributed in the interior, that the redistribution of cold is improved and in particular no areas of the interior occupy more temperatures below freezing, on the other hand, more distant areas of the interior are cooled evenly.

The self-sufficient refrigerated serving trolley can furthermore have at least one circulating device for circulating the cooling fluid, wherein the circulating device can be operated by the electrical energy generated by the thermoelectric element. If the cooling fluid used is air, the distribution system may in particular have at least one fan.

However, it is also within the scope of the invention to use a liquid instead of air as the cooling fluid and the distribution system in particular has at least one pump for circulating the fluid. Both systems have the hygienic advantage over quasi-stationary or stationary external cooling sources that the food and drinks are not flushed with external air, as is currently the case with quasi-stationary external cooling sources arranged in aircraft, that is the case. Here, the cabin air is sucked in, cooled and added to the food. In the context of the invention, however, in contrast to this, at least predominantly circulates the air located in the interior of the refrigerated serving trolley. The circulation of air is further reduced when using a liquid fluid, which can be further improved if necessary, the hygienic conditions.

When using a liquid fluid, the liquid may be adjusted in the composition accordingly or added to allow a liquid operation of the cooling device, even at temperatures lower than the freezing point of water. In particular, when using dry ice as a coolant, the cold can be transported even if the coolant intake is filled with coolant and correspondingly a high delivery of cooling capacity takes place. For example, the fluid may be adjusted to have a phase transition temperature from the liquid to the solid phase in the range of about 263 Kelvin or lower, preferably 250 Kelvin or lower, more preferably 240 Kelvin or lower.

The distribution system may further include at least one edge channel component having an integral fluid channel in the edge channel component. In other words, the structural design of the refrigerated utility cart is utilized to pass the cooling fluid through one of the corner connectors.

For the structural design, the edge channel component can have lateral first and second fastening elements, ie fastening straps, for receiving, for example, a side wall and a rear wall. It can therefore be connected by means of the first and second fastening elements with the edge channel component, the side wall and the rear wall.

The edge channel component may extend over the at least nearly complete vertical extent of the refrigerated serving cart. Furthermore, the edge channel component may have at least one inlet opening directed towards the coolant receptacle and at least one, preferably a plurality of outlet openings directed towards the interior.

The interior of the edge channel component can be advantageously used for the distribution of cold in the interior of the refrigerated serving cart. For example, may have a circulation device in the interior of the edge channel component. The edge channel component may have an integral channel such that substantially the entire interior of the edge channel component is available for delivery of the fluid through the cooling trolley.

The self-contained refrigerated serving cart typically has a front door. Preferably, the front door has at least one door channel, so that the cold of the coolant through the at least one door channel in the interior of the refrigerated serving trolley is conductive.

According to a particularly preferred embodiment, the cooling trolley has a top shelf, wherein the coolant receiver is disposed below the top shelf, and wherein the thermoelectric element is disposed inside the top shelf. The top shelf can also be designed in sandwich construction, wherein an upper-side plate - in particular of metal - with a lower-side plate - in particular also made of metal - is connected via a foam body. This provides on the one hand an insulating function, on the other hand, this can increase the mechanical strength of the shelf. The thermoelectric element may be incorporated in a sandwich-type tray in the foam body, so that a heat flow through the thermoelectric element is concentrated.

The top shelf may also include an additional protector layer to increase the protection of the thermoelectric element from mechanical damage from outside. Further, to improve the heat transfer between the metal plate and the thermoelectric element, an intermediate layer such as a thermal grease may be used.

The self-sufficient refrigerated serving trolley of a preferred embodiment comprises in particular a second thermoelectric element which is electrically connected to the thermoelectric element and operated by the current generated by the thermoelectric element for introducing cold at a remote from the coolant portion of the refrigerated serving cart. In other words, the thermoelectric element generates electricity which transports electricity to the second thermoelectric element via electrical connecting lines and in turn converts electricity into cold with the second thermoelectric element. The particular advantage of this embodiment is the transport of energy via cables instead of volume flows, with cables maintenance-friendly and space-saving can be installed.

The coolant for use in the refrigerated serving trolley is preferably a dry ice, which is inserted in the form of a thermal energy store before the use of the refrigerated serving trolley in the coolant receptacle.

For further improvement, the self-sufficient refrigerated serving trolley may further comprise a control device for monitoring and / or controlling the distribution system. This may include, for example, a pressure sensor for the fluid, one or more temperature sensors for detecting the temperature or the temperature distribution in the interior and the regulation of the delivery rate of the circulating device in particular on the speed.

In a further embodiment, a temperature display and / or a temperature data memory and / or a status display for displaying the operating state of the thermoelectric element or the distribution system may be included.

In yet another embodiment, an electrical buffer memory, in particular a capacitor, may be provided for temporarily providing the electrical energy for the distribution system. This may, for example, enable the operation of the distribution system to continue to be maintained or supported when insufficient energy can be supplied to the thermoelectric element, especially when the coolant supply has become depleted.

In order to keep the cold inside the refrigerated serving cart for a long period of time, heat insulation may be provided, and the thermoelectric element (s) may be arranged at recesses of the heat insulation. As a result, the refrigerant flow exiting from the refrigerated serving trolley is channeled through the thermoelectric elements.

Also provided in accordance with the present invention is a self-contained refrigerated serving cart that is adapted for cooling beverages or meals, including a coolant receptacle, such as a refrigerator. a dry ice drawer, for receiving a coolant which is prepared for discharging cold into the interior of the refrigerated serving cart. The self-sufficient refrigerated serving trolley comprises a distribution system for distributing the cold of the coolant in the interior of the refrigerated serving trolley, at least one side wall and a rear wall, and at least one edge channel component with an integral fluid channel, wherein the side wall and the rear wall by means of the first or second fastening tabs are connected to the edge channel component.

Finally, a cooling system according to the invention for use in a refrigerated serving trolley, which has an interior for receiving drinks or food to be cooled, presented further. The cooling system includes a coolant intake, such as a coolant. a dry ice drawer, for receiving a coolant which is prepared for discharging cold into the interior of the refrigerated serving trolley, and arranged on the coolant receiving thermoelectric element for generating electrical energy from at least a portion of the votes of the coolant cold.

In the following the invention will be explained in more detail by means of exemplary embodiments and with reference to the figures, wherein identical and similar elements are in part provided with the same reference numerals and the features of different embodiments can be combined with each other.

list of figures

• 1 eine Frontansicht eines erfindungsgemäßen Kühl-Servierwagens,
• 2 eine Teil-Schnittansicht einer ersten Ausführungsform des aus dem Kühl-Servierwagen herausnehmbaren Kühlsystems,
• 3 eine Aufsicht des aus dem Kühl-Servierwagen herausnehmbaren Kühlsystems,
• 4 eine Teil-Schnittansicht einer weiteren Ausführungsform des Kühlsystems,
• 5 eine Teil-Schnittansicht noch einer weiteren Ausführungsform des Kühlsystems,
• 6 eine Teil-Schnittansicht einer Ausführungsform des Kühlsystems mit einem Türkanal,
• 7 Seitenansicht der Ausführungsform des Kühlsystems mit Türkanal eingesetzt in einen Kühl-Servierwagen,
• 8 Teil-Schnittansicht einer Ausführungsform des Kühl-Servierwagens,
• 9 Teil-Schnittansicht einer weiteren Ausführungsform des Kühl-Servierwagens mit zwei thermoelektrischen Elementen,
• 10 Seitliche Teil-Schnittansicht einer Ausführungsform des Kühl-Servierwagens,
• 11 Teil-Schnittansicht einer Ausführungsform des Kühl-Servierwagens mit Fluidkanälen,
• 12 Oberseitige Teil-Schnittansicht der Ausführungsform des Kühl-Servierwagens mit einem Kantenkanal-Bauteil,
• 13 Oberseitige Teil-Schnittansicht einer weiteren Ausführungsform des Kühl-Servierwagens mit zwei Kantenkanal-Bauteilen,
• 14 Frontansicht eines geschlossenen Kühl-Servierwagens,
• 15 weitere Teil-Schnittansicht mit Auslassöffnung im Kantenkanal-Bauteil,
• 16 Schnittansicht eines Kühl-Servierwagens mit Auslassöffnungen im Kantenkanal-Bauteil,
• 17 Schnittansicht einer weiteren Ausführungsform mit Kantenkanal-Bauteil und angesetztem Wärmetauscher,
• 18 Schnittansicht des Kühl-Servierwagens mit Kantenkanal-Bauteil und mehreren Wärmetauschern,
• 19 Frontansicht eines geöffneten Kühl-Servierwagens mit im Innenraum angeordnetem thermoelektrischen Element.

Show it:

• 1 a front view of a refrigerated serving trolley according to the invention,
• 2 a partial sectional view of a first embodiment of the removable from the cooling trolley cooling system,
• 3 a top view of the removable from the cooling trolley cooling system,
• 4 a partial sectional view of another embodiment of the cooling system,
• 5 a partial sectional view of yet another embodiment of the cooling system,
• 6 a partial sectional view of an embodiment of the cooling system with a door channel,
• 7 Side view of the embodiment of the cooling system with door channel inserted into a refrigerated serving trolley,
• 8th Partial sectional view of an embodiment of the refrigerated serving cart,
• 9 Partial sectional view of another embodiment of the refrigerated serving cart with two thermoelectric elements,
• 10 Partial side sectional view of an embodiment of the refrigerated serving cart,
• 11 Partial sectional view of an embodiment of the refrigerated serving trolley with fluid channels,
• 12 Upper part-sectional view of the embodiment of the refrigerated serving trolley with an edge channel component,
• 13 Upper part-sectional view of another embodiment of the refrigerated serving cart with two edge channel components,
• 14 Front view of a closed refrigerated serving cart,
• 15 further partial sectional view with outlet opening in the edge channel component,
• 16 Section view of a refrigerated serving trolley with outlet openings in the edge channel component,
• 17 Section view of another embodiment with edge channel component and attached heat exchanger,
• 18 Section view of the refrigerated serving trolley with edge channel component and a plurality of heat exchangers,
• 19 Front view of an opened refrigerated serving trolley with a thermoelectric element arranged in the interior.

Detailed description of the invention

Referring to 1 is a refrigerated serving cart 10 with open door 14 shown. The refrigerated serving trolley has an interior 12 for the storage of containers 20 used in side rails or shots 18 are held. Under a top shelf 26 is a coolant intake 50 arranged in the most compact form the complete cooling device 60 may include. In this embodiment, the containers 20 very variable over the entire interior 12 distributable, allowing even larger or smaller containers 20 can be used. The entire interior 12 should be cooled.

The refrigerated serving trolley 10 is rollable on wheels or wheels 22 stored and has a braking device 24 , which is operable with the foot. The door 14 is with hinges 16 on the refrigerated serving trolley 10 struck.

Referring to 2 is shown a side sectional view, wherein the cooling system 60 in a refrigerated serving trolley 10 is used. The cooling system 60 is completely removable from the refrigerated trolley, resulting in the cooling system 60 also suitable for use in a known refrigerated serving trolley. The cooling system is absorbed by the coolant 50 which is similar to a conventional dry ice drawer, so that it can be inserted into the corresponding receptacle receptacle of a refrigerated serving cart.

The cooling system has the coolant intake 50 on, in the dry ice pieces 64 can be put into it. On a back wall of coolant intake 50 is a circulating agent 66 arranged, in this case a fan 66 with fan blades 68 , The circulating means 66 is with an electrical connection 72 with the thermoelectric element 62 connected, which in turn the upper side of the coolant absorption 50 is arranged, ie in particular above the range, for the introduction of the dry ice pieces 64 is trained.

From the dry ice pieces 64 gradually forms a cold flow 70 which initially develops independently. It also forms a part of loss-cooling flow, which is directed towards the environment. This loss of cooling air will escape from the refrigerated serving trolley and is not available for cooling food and drinks.

By the clever arrangement of the thermoelectric element 62 , So for example, a Peltier element, above the receiving area 50a for the dry ice pieces 64 , the loss of cold flow, which forms the top shelf 26a is directed, so that he first the Peltier element 62 must happen. Passing through the Peltier element 62 becomes in the Peltier element 62 generates a current. By in the Peltier element 62 generated electricity becomes the fan 66 driven so that the available for the interior cooling flow 70 over the fan 66 better in the interior 12 can be distributed.

The coolant intake 50 is with a locking means 54 locked on the refrigerated trolley with an opener 52 can be depressed to the Kühlmittelaufnhame 50 to be taken from the refrigerated serving trolley.

The inventors have in this context, as well as for all embodiments shown with circulating devices such as fans or pumps, found that even a very low electric current is suitable to drive equipped with a high-quality storage fan so that a measurable improvement in the cooling distribution in the interior 12 can be guaranteed.

3 shows a cooling device 60 with Peltier element 62 which is above the receiving area 50a is arranged for the dry ice. On the back of the coolant intake 50 is the fan 66 arranged.

4 shows a further embodiment of a cooling device 60 with a first fan 66 and another fan 74 , both from the Peltier element 62 be supplied with electrical energy. Through the use of two fans 66 . 74 can the cold distribution in the interior 12 of the refrigerated serving cart 10 be further improved. Front of the coolant intake 50 there is at least one passage 78 in the refrigerated serving cart 10 so that's where the fan comes from 74 accelerated cooling fluid in the interior 12 can occur. It may be at the passage 78 to act several juxtaposed holes that would be recognizable as a row of holes in a plan view. It can also be provided a continuous slot. The arrangement of fans 66 . 74 not in the bottom of the recording area 50a prevents any falling or flowing of dry ice into the interior 12 ,

5 shows a further embodiment of a cooling device 60 , wherein the front-side guide part 79 . 82 . 84 designed to be that of the fan 74 accelerated fluid through the passage 79 in the adjoining door 14 can occur. There is a door channel in the door 82 with side openings 84 arranged so that the fluid through the door channel 82 with the door closed in the whole interior 12 can be distributed. The integrated door channel 82 has the advantage that no additional space for air distribution is needed. However, experimental studies suggest so far that an integrated door channel 82 the structure of the door 14 possibly so clearly can weaken the door 14 the obligatory load test for service vehicles no longer exists.

6 shows one too 5 alternative embodiment in which the front-side fan 74 the fluid through the passage 80 then transport the fluid into a door 14 attached door channel 81 entry. The door channel 81 has side openings 86 on to the fluid in the interior 12 of the refrigerated serving cart 10 to distribute. The attached door channel 81 It is advantageous that he has the structure of the door 14 not affected and does not weaken. The thickness of the attached door channel 81 can be sized so that the standardized containers 20 with the door closed 14 still in the refrigerated serving trolley 10 fit. It has been shown that here about 3 to a maximum of 7 millimeters height for the door channel 81 be available.

7 shows a refrigerated serving trolley 10 with attached door channel 81 front side with open door 14 , The passage 80 directs the fluid into the attached door channel 81 , where outlets 86 a distribution of the fluid over the entire interior 12 enable.

8th shows a refrigerated serving trolley 10 with inserted coolant intake 50 and in the reception area 50a used dry ice 64 , Below the top shelf 26a is a thermoelectric element 63 arranged and between upper shelf 26a and counter plate 63a positioned. The composite of upper shelf 26a , Peltier element 63 uncd counter plate 63a forms a durable composite that resists impact from outside dimensionally stable and yet the thermoelectric element 63 protects. A larger part of the cold-loss power passes through the thermoelectric element 63 , whereby in this a power generation is induced. By means of the thermoelectric element 63 generated electricity can be the back fan 90 are driven. The fluid, in this case the inside of the refrigerated serving cart 10 Air can through the back openings, such as slots or holes in the coolant intake 50 emerge from this and to the back fan 90 reach. Once the fan 90 with electricity from the thermoelectric element 63 is supplied, it will generate on its upper side a slight negative pressure, and thus the air from the coolant intake 50 suck in and in the interior 12 to distribute.

9 shows an embodiment with a first thermoelectric element 63 and a second thermoelectric element 63 ' , which is below the coolant intake 50 is arranged. The second thermoelectric element 63 ' takes into account the direct diffusion of cold through the bottom of the coolant intake 50 , The through the Peltier element 63 ' passing cold induced therein an electric current, which together with the Peltier element 63 for the operation of the fans 89 . 90 and 91 can be used. Thus, on the one hand, the distributed in the interior of the refrigerated trolley refrigerating flow almost loss-free "interim", on the other hand, by means of the additional fan 89 and 91 an improved flow in the interior 12 produced, which is able to distribute the cold even better. In particular, a cold accumulation in the immediate vicinity of the coolant intake 50 and a possible freezing of food or drink in the topmost container 20 can thus be avoided.

10 shows a further embodiment, wherein adjacent to the thermoelectric element 63 a heat exchanger 92 is arranged, which transfers an amount of heat into the cooling fluid, in this embodiment, the cooling fluid is liquid and through a channel 94 in the edge channel component 96 to be led. Through the edge channel component 96 can the fluid along the interior 12 be distributed.

11 shows an embodiment of the refrigerated serving cart 10 with channel 94 and edge channel component 96 , Along the side wall 29 The fluid can go down to the interior 12 to be brought.

12 shows a further embodiment, wherein a liquid fluid is used to transport the cold within the refrigerated serving cart. Adjacent to the thermoelectric element 63 is a heat exchanger 92 arranged to receive cold to the fluid. The fluid is by means of the edge channel component 96 arranged pump 98 transported, with the pump 98 from the thermoelectric element 63 generated electricity can be driven.

13 shows a further embodiment for the use of liquid fluid, wherein a first Edges channel device 96 for the removal of the (cold) fluid and a second edge channel component 96 ' is provided for the return transport of the (heated) fluid.

14 shows a section through a refrigerated serving trolley 10 in the area of the interior 12 , wherein an edge channel component 96 is used to transport a gaseous fluid, in particular the air from the refrigerated serving trolley 10 , At openings 97 This fluid can be removed from the edge channel component 96 Escape to the cold of the coolant intake 50 in the interior 12 to distribute. 15 shows for this embodiment, a rear view of a back-cut cooling trolley 10 , wherein the edge channel component 96 is shown cut open. Several openings 97 spread along the edge channel component 96 for distributing the cold in the interior 12 ,

16 and 17 show an embodiment of the refrigerated serving cart 10 , wherein a liquid fluid is used and wherein the fluid through the edge channel component 96 flows, which is designed as an integral fluid channel. The fluid can pass through the opening 97 in a heat exchanger 99 enter and so give cold to the interior. The use of liquid fluid as a heat transport medium can hygienic conditions in the interior 12 of the refrigerated serving cart 10 continue to improve, as none of the entire interior 12 sensing currents occur more, but only local air circulation. Although the other embodiments shown here are already considerably better in terms of hygiene than known solutions, the use of liquid fluid makes the foodstuffs even less susceptible to contact with any biological or chemical impurities from the air. 17 shows the embodiment with heat exchangers 99 extending evenly across the contact area to the interior 12 to distribute.

When using a liquid fluid to distribute the cold in the interior 12 For example, the fluid channels may have flexible elements, such as, in particular, expandable tubes, to accommodate for possible volume changes upon changes in the state of aggregation. Thus, the channels and passages shown in other designs, as well as the edge channel component 96 , with internal hoses. Optionally, the use of corresponding flexible elements such as hoses for transporting the fluid is also provided, for example, if the edge channel component 96 or other components are to be provided with drain holes or flushing holes. This can be regulated by regulations of corresponding countries.

18 shows yet another embodiment of a refrigerated serving cart 10 , wherein the coolant intake 50 indoor 12 is arranged. Above the coolant intake 50 is a thermoelectric element 63 arranged so that of the in the coolant intake 50 arranged coolant radiating or outgoing cold in part, the thermoelectric element 63 can happen. Depending on the desired cold distribution in the refrigerated serving trolley 10 can the thermoelectric element 63 the refrigerated serving trolley 10 in full depth and width of the interior 12 Share or be introduced into a correspondingly sized recording, so that the above the thermoelectric element 63 located part of the interior of the below the thermoelectric element 63 is separated part. This makes it possible, for example, to set two different temperature zones, wherein the lower part would be cooled in this example and the upper part can even be heated, but at least not or significantly less cooled. The thermoelectric element 63 then forms an additional insulation layer between dry ice and heat area.

19 Finally, an embodiment in which a first thermoelectric element 63 near the coolant intake 50 is arranged and electrically connected to a second thermoelectric element 63b is connected, which removed from the coolant intake 50 is arranged. The first thermoelectric element 63 generates electricity by the cold of the coolant intake 50 mountable coolant 64 through the first thermoelectric element 63 penetrates into the environment. The thus generated electricity is by means of electrical connection 72 to the second thermoelectric element 63b transported, and generated in the second, in particular smaller thermoelectric element by using the current cold. By such an arrangement of two thermoelectric elements can also in hard to reach places in the interior 12 of the refrigerated serving cart 10 sufficient cooling or punctual cooling, for example, special food or drinks are guaranteed.

For completeness, it should not be ruled out that the thermoelectric element from the outside of the cooling trolley 10 is attached, eg from the top of the upper shelf 26a or on a sidewall 28 or at the bottom 23 of the refrigerated serving cart. Also, an arrangement of all or a majority of the elements of the cooling system 60 on the back wall 29 , Door 14 or in the area of the floor in the interior 12 or at the bottom 23 is, of course, encompassed by the present disclosure. The in the 1 to 19 Embodiments shown in this regard represent only the most preferred variants, since these have proven to be advantageous, ergonomic and space-saving.

It will be apparent to those skilled in the art that the above-described embodiments are to be read by way of example, and that the invention is not limited to them, but that they can be varied in many ways without departing from the scope of the claims. It is also to be understood that the features, independently as they are disclosed in the specification, claims, figures, or otherwise, also individually define essential components of the invention, even if described together with other features.

Furthermore, it can be seen that many of the embodiments described above can be combined with each other, in particular, a mixed operation with gaseous and liquid cooling fluid is possible and, for example, the door channel in an embodiment with fixed components of the cooling device 60 be used. The other way around, it is possible the edge channel component 96 to combine with an embodiment in which all other components of the cooling device 60 in the coolant intake 50 arranged and thus from the refrigerated serving trolley 10 are removable. Not all possible combinations were presented in detail, in order to avoid too many repetitions and to limit the figures to be presented to the essentials. The person skilled in the art can take the present description as a guide to combine the corresponding embodiments with one another.

LIST OF REFERENCE NUMBERS

10

Cooling trolley

12

inner space

14

door

16

door fittings

18

Rail or receptacle for container

20

container

22

Wheel or roller

24

braking device

26

Top of the refrigerated serving cart

26a

top shelf

28

Side part of the refrigerated serving cart

29

Side or rear of the refrigerated serving cart

50

Refrigerant receiver

50a

Coolant containment area

52

unlocking

54

locking bolt

60

cooling system

62

thermoelectric element

63, 63 '

thermoelectric element

63a

lower plate

63b

second thermoelectric element

64

Coolant, dry ice

66

Fan

68

fan blade

70

flow

72

electrical connection (cable)

74

Fan

76

Fan wheel, fan blade

78

passage

79

passage

80

passage

81

door channel

82

door channel

84

opening

86

opening

88

Fan

89

Fan

90

fan blade

91

Fan

92

heat exchangers

94

channel

95

Corner connector

96, 96 '

Edges channel device

97

opening

98

pump

99

heat exchangers

Claims (17)

Autonomous refrigerated serving trolley (10) adapted for cooling beverages or meals, comprising: an interior space (12) for receiving drinks or food to be cooled, a coolant receiver (50) for receiving a coolant (64) which is adapted to release cold into the interior of the refrigerated utility cart, a thermoelectric element (62, 63, 63 ', 63b) for generating electrical energy from at least a portion of the coolant delivered cold. Self-contained refrigerated trolley (10) after Claim 1 and further comprising a cooling system (60) for distributing the refrigerant to the coolant by means of a cooling fluid in the interior of the refrigerated utility cart, wherein the refrigeration system (60) is adapted to receive electrical energy needed to move the refrigerant from the thermoelectric element. Self-contained refrigerated trolley (10) after Claim 1 or 2 further comprising at least one circulation means (66, 74, 88, 89, 91, 98) for circulating the cooling fluid, the circulation means being operable by the electrical energy generated by the thermoelectric element (62, 63, 63 ', 63b) the cooling fluid is air and the distribution system in particular has at least one fan (66, 74, 88, 89, 91), or wherein the cooling fluid is a fluid and the distribution system has in particular at least one pump (98) for circulating the fluid. A self-contained cooling trolley (10) according to any preceding claim, the cooling system (60) further comprising at least one edge channel member (96) having an integral fluid channel in the edge channel member. Autarkic cooling trolley (10) according to the preceding claim, wherein the edge channel component (96) extends over the at least almost complete vertical extension of the refrigerated serving trolley and / or wherein the edge channel component (96) has at least one inlet opening directed towards the coolant receptacle (50) and at least one, preferably a plurality of outlet openings (97) directed towards the interior space (12). Autarkic refrigerated serving trolley (10) according to one of the preceding claims, wherein the refrigerated serving trolley has a front door (14), wherein the front door has at least one door channel (81, 82), so that the cold from the coolant through the at least one door channel in the interior (12) of the refrigerated serving trolley is conductive. A self-contained refrigerated serving trolley (10) according to any one of the preceding claims, wherein the thermoelectric element (62, 63, 63 ', 63b) is arranged so that a portion of the refrigerant escaping from the coolant into the environment surrounding the refrigerated serving trolley thermoelectric element diffuses. Autarkic refrigerated serving trolley (10) according to one of the preceding claims, wherein the refrigerated serving trolley has a top shelf (26a), wherein the coolant receiver (50) is disposed below the top shelf, and wherein the thermoelectric element (62, 63, 63 ', 63b) is disposed inside the top shelf. A self-contained refrigerated trolley (10) according to the preceding claim, wherein the top shelf (26a) comprises a protector layer for protecting the thermoelectric element (62, 63, 63 ', 63b) from mechanical damage. A self-contained refrigerated trolley (10) according to any one of the preceding claims, further comprising a second thermoelectric element (63 ', 63b) electrically connected to the thermoelectric element (62, 63) and powered by the current generated by the thermoelectric element for introduction from cold at a portion of the refrigerated utility cart removed from the coolant. A self-contained refrigerated trolley (10) according to any preceding claim, wherein the coolant (64) is a dry ice. A self-contained cooling trolley (10) according to any one of the preceding claims, further comprising a control device for monitoring and / or controlling the distribution system according to any one of Claims 2 to 10 , A self-contained refrigerated trolley (10) according to any one of the preceding claims, further comprising a temperature indicator and / or a temperature data store and / or a status indicator to represent the operating condition of the thermoelectric element or distribution system. A self-contained refrigerated trolley (10) according to any one of the preceding claims, further comprising an electrical buffer, in particular a condenser, for temporarily providing the electrical energy to the distribution system. A self-contained refrigerated trolley (10) according to any one of the preceding claims, wherein the refrigerated trolley has a thermal insulation. Autarkic refrigerated serving trolley (10) adapted for cooling beverages or meals, comprising a coolant receiver (50) for receiving a coolant (64) which is adapted to release cold into the interior (12) of the refrigerated utility cart, a cooling system (60) for distributing the cold of the coolant in the interior of the refrigerated utility cart, at least a side wall (28) and a rear wall (29), at least one edge channel component (96) having an integral fluid channel, wherein the side wall and the rear wall are connected by first and second attachment tabs with the edge channel component. Cooling system (60) for use in a refrigerated serving trolley (10) having an interior space (12) for receiving drinks or food to be cooled, comprising: a coolant receiver (50) for receiving a coolant (64) which is prepared for emitting cold into the interior of the refrigerated serving cart, a arranged at the coolant receiving thermoelectric element (62, 63, 63 ', 63b) for generating electrical energy from at least a portion of the votes of the coolant cold.

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