DE102022131980B4 - Product presenters and methods for presenting goods to be kept warm - Google Patents

Abstract

In order to provide a product presenter or a method for presenting goods that are to be kept warm, which can be built or implemented in a structurally simple and compact manner that is as energy-efficient as possible, the goods or the goods area can be heated both by direct electromagnetic radiation, such as IR radiation, and by heating by means of a warm circulating air flow, and a compact structure can be ensured if the same heating device is used both for heating the circulating air flow and for heating by means of electromagnetic radiation.

Description

The invention relates to a product presenter for presenting products to be kept warm, having a user side, a top side, a bottom side, a rear side opposite the user side and two lateral sides opposite one another, as well as having a product space accessible from the user side, which is located above a product presentation plate, which is delimited at least on the rear side and the top side by a product space wall and in which the products to be kept warm can be arranged, and having circulating air generating means for generating a circulating air stream flowing through the product space and guided from a circulating air duct inlet to a circulating air duct outlet opening downwards into the product space in a circulating air duct. The invention also relates to a method for presenting products to be kept warm within a product space located above a product presentation plate, delimited by a product space wall and through which a circulating air stream introduced into the product space from above flows.

Product presenters are inherently WO 2010 / 002 243 or from the WO 2014 / 072 693 A1 and A2 from the US 2020 / 0 121 129 A1 This also applies to corresponding methods for the presentation of goods that are to be kept warm. Here, the WO 2010 / 002 243 A2 a product presenter or a corresponding method in which a product area is located above a product presentation plate and is delimited by a product area wall, whereby a circulating air flow is introduced into the product area from below, which can then heat the associated products. In addition, a heating plate is provided above the respective product area, which also serves to heat it. This is different with the WO 2014 / 072 693 A1 and the US 2020 / 0 121 129 A1 in which a product presenter serves to present goods to be kept warm and has a user side, a top side, a bottom side, a rear side opposite the user side and two lateral sides opposite one another. A corresponding goods area is accessible from the user side and is located above a goods presentation plate, wherein the goods area is delimited at least on its rear side and the top side by a goods area wall and the goods to be kept warm can be arranged in the goods area. The goods presenter further comprises circulating air generating means for generating a circulating air flow flowing through the goods area and guided from a circulating air duct inlet to a circulating air duct outlet opening into the goods area in a circulating air duct, wherein this arrangement is also similar to the arrangement according to the WO 2010 / 0 022 243 A2 However, the recirculation duct outlet opens when the WO 2014 / 072 693 A1 down into the goods room, which WO 2010 / 0 022 443 A2 and the US 2020 / 0 121 129 A1 The latter also applies to a corresponding presentation method for goods that are to be kept warm, which can be arranged within a goods area located above a goods presentation panel, delimited by a goods area and through which a circulating air flow is introduced into the goods area from above.

Tub-like product displays, on the other hand, reveal the FR 2 637 479 A1 and the EN 600 12 167 T2 .

In addition, the BE 475 700 A , from the US$4,283,614 , from the US$5,558,010 , from the US$4,395,233 and from the WO 2003/024154 A1 ovens are known which can be used to heat goods using a circulating air process. However, these are not used to present goods, as the oven flap already reduces any possible pressure on the goods, which should not be the case with goods presenters, although it is certainly conceivable that such goods presenters - for energy reasons alone - have a flap or door through which users can remove the goods, but - unlike ovens - these should be as easy to open as possible.

Heating food is also possible from the WO 2004/005819 A2 where the food is heated in appropriate baskets or tubs so that it can then be served. Here too, an oven is used for heating and the presentation of the goods is not the main focus.

It is the object of the present invention to provide product presenters and methods for presenting goods to be kept warm, which can be built or implemented in a structurally simple and compact manner in the most energy-efficient way possible.

The object of the invention is achieved by a product presenter and a method for presenting goods to be kept warm with the features of the independent claims. Further advantageous embodiments, possibly also independent of these, can be found in the subclaims and the following description.

In order to provide a product presenter or a method for presenting goods that are to be kept warm, which is structurally simple and compact In order to ensure that the goods can be built or implemented in the most energy-efficient way possible, the basic knowledge that is used here is that heating of the goods or the goods area both by direct electromagnetic radiation, such as IR radiation (infrared radiation), and by heating by means of a warm circulating air flow, a compact structure can be ensured if - if possible - the same heating device is used both for heating the circulating air flow and for heating by means of electromagnetic radiation.

Thus, a product presenter for presenting goods to be kept warm with a user side, a top, a bottom, a rear side opposite the user side and two lateral sides opposite each other, as well as with a goods space accessible from the user side, which is located above a goods presentation plate, which is delimited at least on the back and the top by a goods space wall and in which the goods to be kept warm can be arranged, and with circulating air generation means for generating a circulating air flow flowing through the goods space and guided from a circulating air duct inlet to a circulating air duct outlet opening downwards into the goods space in a circulating air duct, can be characterized in that a heating device is embedded in the goods space wall and is in thermal contact with the circulating air duct in order to provide a product presenter that is as energy-efficient as possible in a structurally simple and compact manner. This arrangement, if suitably designed, enables energy to be used in two ways: direct radiation from the heating device embedded in the wall of the goods room and indirect heat from the circulating air flow, which can also be heated by the heating device. Depending on the specific process or the specific design of the goods display, the circulating air in thermal contact can be used to cool the heating device in order to increase its efficiency with regard to the emitted electromagnetic radiation or thermal radiation, thereby optimizing energy yield.

Accordingly, cumulatively or alternatively to the other combinations of features mentioned here, a method for presenting goods to be kept warm within a goods room located above a goods presentation panel, which is delimited by a goods room wall and through which a circulating air flow introduced into the goods room from above flows, can be characterized in that the goods room or the goods are directly heated by a heating device embedded in the goods room wall, which heats the circulating air flow outside the goods room and/or is cooled by the circulating air flow from outside the goods room, in order to provide a goods presenter or a method for presenting goods to be kept warm, which can be implemented as efficiently as possible in terms of energy in a structurally simple and compact manner. Here too, with a suitable design, a double use of energy is possible, namely direct radiation through the heating device embedded in the goods room wall and indirect heat through the warm circulating air flow. Here too, it is possible, with suitable process management or with suitable design of the product presenter in which the process is implemented, to energetically optimise the energetic efficiency with which the direct heating takes place, such as in particular the conversion into IR rays by cooling the heating device by means of the heated circulating air.

In order to provide a product presenter that is as energy-efficient as possible in a structurally simple and compact manner, a product presenter for presenting goods to be kept warm with a user side, a top side, a bottom side, a rear side opposite the user side and two lateral sides opposite one another, as well as with a goods compartment accessible from the user side, which is delimited at least on the rear side and the top side by a goods compartment wall and in which the goods to be kept warm can be arranged, and with circulating air generating means for generating a circulating air flow that flows through the goods compartment and is guided from a circulating air duct inlet to a circulating air duct outlet opening downwards into the goods compartment in a circulating air duct, cumulatively or alternatively to the other combinations of features mentioned here, can be characterized in that a heating device is embedded in a circulating air duct wall of the circulating air duct. If the product presenter is suitably designed, this enables intensive contact between the heating device and the circulating air and possibly even the circulating air duct wall, so that the heating device can also intensively release its energy into the circulating air. In particular, the inlet into the circulating air duct wall can make it possible for energy components to be used for other purposes, for example by the heating device radiating directly into the goods area if the corresponding circulating air duct wall also serves as the goods area wall, or by using directed radiated heat energy to heat the circulating air flow. On the other hand, it is conceivable, for example, that other areas of the product presenter that are in contact with the associated circulating air duct wall are also heated or cooled by the heating device. This can be done, for example, by This could be additional recirculation ducts or other areas of the same recirculation duct. In particular, it is conceivable, for example, that the recirculation air flow is guided past the heating device within two different areas of the recirculation duct, so that it is ultimately heated twice before it returns to the goods area.

Accordingly, cumulatively or alternatively to the other combinations of features presented here, a method for presenting goods to be kept warm within a goods space located above a goods presentation plate, which is delimited by a goods space wall and through which a circulating air flow introduced into the goods space from above flows, can be characterized in that the circulating air flow outside the goods space is successively heated at least twice in order to provide a method for presenting goods to be kept warm, which can be implemented as efficiently as possible in terms of energy in a structurally simple and compact manner.

The double heating enables particularly effective heating of the circulating air flow, so that the energy of a heating device used for heating, for example, can be brought into the goods area by the circulating air flow in a correspondingly effective manner. In principle, it is conceivable that the double heating takes place using two separate heating devices. However, it is particularly preferred if the associated circulating air flow is guided past the same heating device twice, which can be implemented in a structurally simple manner, for example, by inserting an associated heating device into a circulating air duct wall that is part of different areas of the circulating air duct, for example by the respective flow direction of the circulating air flow in these two circulating air duct areas being opposite.

Cumulatively or alternatively to the other combinations of features presented here, in order to provide a product presenter that is as energy-efficient as possible in a structurally simple and compact manner, this product presenter for presenting goods to be kept warm can be characterized by a user side, a top side, a bottom side, a rear side opposite the user side and two lateral sides opposite one another, as well as a goods space accessible from the user side, which is located above a goods presentation plate, which is delimited at least on the back side and the top side by a goods space wall and in which the goods to be kept warm can be arranged, and with circulating air generation means for generating a circulating air flow that flows through the goods space and is guided from a circulating air duct inlet to a circulating air duct outlet opening downwards into the goods space, in that a heating device is arranged on or opposite a wall region of the goods space wall that extends with a component parallel to the goods presentation plate. This allows, with a suitable design of the product presenter, indirect heating of the product area wall, which in turn can indirectly heat the product area or the product presentation plate or warm products arranged on it through heat radiation. In this respect, the associated product area wall, which is heated by the heating device, serves as an IR heating device or IR radiator, whereby the product area wall extends with one component parallel to the product presentation plate, the corresponding heat emission via heat radiation can be distributed over a relatively large area of the product presentation plate or the product area, without losses due to the opening of the product area becoming too great.

Accordingly, a method for presenting goods to be kept warm within a goods space located above a goods presentation plate, which is delimited by a goods space wall and through which a circulating air flow introduced into the goods space from above flows can be characterized in that the circulating air flow is heated within a channel region of a circulating air channel, which extends with a component parallel to the goods presentation plate, in order to provide, cumulatively or alternatively to the combinations of features otherwise presented here, a method for presenting goods to be kept warm, which can be implemented as efficiently as possible in terms of energy in a structurally simple and compact manner. Here too, a suitable process control or a suitable design of the product presenter in which the corresponding process is carried out enables a compact structure and good use of installation space, because the heating of the circulating air flow within a channel area extending with a component parallel to the product presentation plate leads to the walls of this channel area being heated excessively, since not all of the energy that is intended to heat the circulating air flow can also be given to the circulating air flow itself, so that the associated channel walls can also be used to heat the goods over a relatively large area across the product space or the product presentation plate.

It is particularly advantageous if the circulating air flow within a component parallel to the product display plate extending channel region of the recirculation duct is heated or if the heating device is arranged on or opposite a wall region of the goods room wall which extends with a component parallel to the goods presentation plate. Because one component of the wall region or the channel region extends parallel to the goods presentation plate, the goods presentation plate or the goods arranged on it see as large an area as possible of the respective wall regions or the wall of the associated channel region, which then leads to the best possible energetic utilization of the thermal energy radiated from these wall regions or from the walls of the associated channel regions. In particular, the radiation then takes place with a corresponding component which is directed at the goods presentation plate or at the goods which are arranged on it, unlike would be the case with radiation if the associated walls or wall regions were to radiate towards the user side, for example. The associated direct radiation energy would then be lost because it would leave the product presenter via the user side and the associated opening.

Product presenters as such have been known for a very long time for the presentation of goods, with the initial focus being on goods that are to be presented at room temperature or on cool goods that are to be presented accordingly. When presenting the goods, it is usually important that they are presented in the most attractive way possible so that customers or users are encouraged to own these goods, and therefore generally to buy them. To this end, such product presenters usually have at least one user side from which such goods can at least be viewed intensively.

Especially in the self-service area, it is known to design the user side sufficiently open so that users are able to remove goods themselves.

While this is easily possible for goods that are to be stored and displayed at room temperature, goods that are to be displayed at a cool temperature cause problems in terms of energy efficiency, which is why various approaches have been made to increase energy efficiency using doors, flaps or suitable air circulation systems. However, the focus here is usually on the pressure of the goods, i.e. the lowest possible barrier for users to take possession of these goods, so that energy disadvantages may be accepted.

Something similar has recently been used for the presentation of goods that need to be kept warm, with such product presenters having a user side, a top side, a bottom side, a back side opposite the user side and two lateral sides facing each other. It is conceivable that the lateral sides in particular also create product pressure, which may also apply to the top side, for example by providing viewing windows or removal openings. The corresponding definitions of the sides as user side etc. are therefore not very narrow definitions, but essentially geometric definitions which, based on the functionality of a product presenter to present goods with the highest possible product pressure, specify a side that should essentially appeal to a user and can therefore be primarily defined as the user side.

Within the product presenter, a product space is provided which is accessible at least from the user side, which is located above a product presentation panel and which is delimited at least on the back and the top by a product space wall.

The product presentation board is primarily used to store and present the goods. It does not necessarily have to be a flat board shape, but can also be designed as a bowl or tray, although this can lead to lower product pressure depending on the goods to be presented. The product presentation board is preferably flat, which allows for a very high level of flexibility in the type of goods that can be presented.

Depending on the specific design, the product display panel can be designed like a grate or can include a grating. However, this can lead to cleaning problems, so a continuous surface is preferred as a product display panel, at least for cleaning reasons.

Depending on the specific design, the product presentation board can comprise a glass pane or glass plate, a stainless steel pane or stainless steel plate, or a stainless steel composite pane or stainless steel composite plate. Such designs are relatively flexible in use and easy to clean. In particular, they also enable the goods stored on them to be presented in an attractive manner.

Depending on the specific requirements, it can be advantageous if the product presentation plate itself can be heated. This can be done, for example, This can be implemented by the product presentation plate comprising a heating plate, which is arranged, for example, underneath the aforementioned components, such as glass, stainless steel or stainless steel composite panes or plates. The use of heating plates has the advantage that good heat transfer and thus high effectiveness can be ensured via a surface heat contact with the corresponding cover plates.

The product presenters described here can be used in particular in self-service areas, i.e. where a user is required to independently remove goods from the product area.

Particularly in the case of goods that are to be kept warm or presented warm, this means that the goods are usually offered packaged in order to meet hygienic requirements. This also has the advantage that the circulating air flow, which - as already explained above - is to be used for heating, does not have to meet too high requirements, since there is no risk of the goods drying out to the same extent as there would be with goods that are to be kept warm and presented openly.

On the other hand, it is clear that the product displays in question are not limited to packaged goods, although this may mean that increased requirements are placed on the air flow and the provision of spit guards and the like. Increased levels of contamination may also be expected.

Accordingly, it is advantageous if the goods area is accessible at least from the user side, and, as already explained above, is located above the goods display panel. In this case, flaps or doors can be provided if necessary to increase energy efficiency, as long as the goods pressure does not drop too much as a result. This means that, in contrast to ovens in which the presentation of the goods is initially in the background, such flaps or doors should be very easy to open and, in particular, should also be transparent over as large an area as possible. Apart from the actual goods display panel that supports the goods, it is therefore initially sufficient if the goods area is delimited by a goods area wall at least on the back and top. It goes without saying that the back and top can be translucent if the goods pressure requires this. On the other hand, the top and back can also be provided with insulation or with insulating bodies, which are often opaque, in order to ensure the highest possible energy efficiency.

Depending on the specific implementation, the goods room wall can be designed to be openable at the rear in order to enable maintenance work or loading and unloading of the goods room from the rear, for example by operating personnel.

It goes without saying that a goods room wall can also be provided on the lateral sides. Depending on the specific implementation, this goods room wall can be transparent, in particular with surfaces that are mirrored on the inside and possibly transparent on the outside, if the product pressure can or should be increased even further in this way. On the other hand, it is also conceivable to provide the goods room side walls on the lateral sides with insulation or insulating bodies in order to increase energy efficiency. In these cases too, the inside of the goods room side walls can be mirrored if necessary in order to increase the product pressure.

Since goods can be arranged above each product display panel by definition, a product space can be defined above each product display panel.

On the other hand, it is conceivable that two or more product display panels are arranged next to each other within a product area, but which can ultimately be viewed together as one continuous product display panel that is divided into individual fields.

It is also conceivable that smaller shelf structures or thin panels can be used in a goods room above a lowest goods display panel in order to be able to store or display additional goods in a goods room. Such intermediate panels are preferably not assigned a separate goods room as long as the intermediate panels are passive, i.e. do not have any components that actively influence the energy balance of the goods room, such as heaters or air circulation ducts. If the latter is the case, such intermediate panels can then also be assigned their own goods room.

However, it is particularly preferred to have exactly one product presentation panel, possibly in several parts, within the product area, which requires a particularly compact structure of the associated product presenter.

In particular, the goods area can be surrounded by a self-supporting frame, so that the associated product presenter can be used in a variety of ways in a self-supporting manner.

In particular, such a self-supporting frame can be provided with feet or castors, for example, so that it can be placed independently on a table or on the floor.

Depending on the specific design, a corresponding product presenter may then only need to be connected to an energy source in order to be able to use it as intended.

Depending on the specific design, the walls already explained above, such as the rear wall of the goods room, a ceiling on the top of the goods room, a floor or the goods presentation panel or the side walls of the goods room can be part of the frame and contribute to the self-supporting design of the frame. On the other hand, these walls can also simply be attached to the frame, especially if they are only made of thin panes or plates, for example.

The product presenter can be built or used particularly flexibly if the self-supporting frame only surrounds one product area. This enables a very compact design of the product presenter, which can be combined with other, similar product presenters to form larger units or product presenters.

In particular, it is advantageous if the self-supporting frame is sufficiently stable so that it can support not only itself but also another product presenter or even two or three other product presenters.

This then makes it possible for the self-supporting frame to form a presenter module, which can then be designed as a corresponding product presenter.

It is then also possible to combine two or more such presenter modules to form the actual product presenter, so that the latter is then available from several presenter modules, in particular each with exactly one product compartment and preferably only exactly one product presentation panel per product compartment.

As already explained above, such presenter modules comprise at least circulating air generation means for generating a circulating air flow that flows through the product area. If goods that are to be kept warm are to be presented in the product presenter, it is advantageous if the circulating air flow is heated in a suitable manner.

To increase energy efficiency, it can be advantageous if a protective air flow is provided outside the circulating air flow, which energetically shields the circulating air flow from the outside. A corresponding protective air flow can, for example, additionally flow past the opening on the user side of the goods area in order to keep the circulating air flow as far as possible within the goods area.

Such a protective air flow can possibly already be advantageously provided in a product presenter that only comprises one product area and preferably only one frame that self-supports this product area, in which case it may then be integrated into the associated self-supporting frame. On the other hand, it is conceivable that such a protective air flow is used in a product presenter that is composed of several such presenter modules. In this case, it can be advantageous if the protective air flow generation means are only provided once in such a product presenter and not separately for each presenter module.

Any means of generating air circulation that is suitable for stimulating a flow of air circulation in a goods room can be used to generate the flow of air that flows through the goods room.

In particular, it is conceivable that the circulating air generation means generate a circulating air flow into the goods area or through the goods area exclusively via convection currents. However, such circulating air flows appear to be relatively sensitive to external influences and make it difficult to specifically pass through narrow duct inlets or duct outlets.

Accordingly, it appears advantageous if the circulating air generation means comprise a blower, through which circulating air flows can ultimately be generated or stimulated in a targeted manner. In particular, any type of fan can be used as a blower. It goes without saying that - depending on the desired flow paths - axial or radial blowers can be used to advantage.

Preferably, the fans are driven by an electric motor, although other types of drive are also conceivable, such as hydraulic or pneumatic drives.

In particular, the blower can be a fan.

A merchandise room with an appealing exterior, i.e. a merchandise room with a relatively high merchandise pressure, can be provided if the circulating air flow flowing through the merchandise room is guided in a circulating air duct that is directed from a circulating air duct inlet to a circulating air duct outlet that opens into the merchandise room. The circulating air flow then leaves the merchandise room in the circulating air duct so that it can be manipulated outside the merchandise room if the merchandise presenter or the associated process is suitably designed. This makes it possible to keep any manipulation of the circulating air flow inside the merchandise room to a minimum, which accordingly enables an appealing interior of the merchandise room so that it can be provided with the highest possible merchandise pressure.

In this regard, any device that is suitable for directing a circulating air flow outside the goods area in a suitable manner can serve as a recirculating air duct. In particular, pipes or cavities with a rectangular cross-section that are provided outside the goods area but inside the goods display can serve as recirculating air ducts.

Accordingly, it is advantageous if a recirculation duct has recirculation duct walls which, as walls, delimit the cavity that carries the recirculation air. It is entirely conceivable that such recirculation duct walls also fulfil other tasks, such as heat-conducting or heat-radiating tasks, such as providing a goods compartment wall or forming a recirculation duct wall for another area of the recirculation duct. The recirculation duct walls can also have an insulating effect or be provided with insulating bodies if this appears advantageous.

In order to ensure a targeted guidance of the recirculating air flow, it is advantageous if the recirculating air duct has a recirculating air duct inlet and a recirculating air duct outlet, whereby, depending on the specific design, a simple opening of the recirculating air duct or its recirculating air duct wall can serve as a recirculating air duct inlet or as a recirculating air duct outlet.

Preferably, both the recirculation duct inlet and the recirculation duct outlet are provided in the goods compartment wall of the goods compartment, so that a recirculation air flow directed from the recirculation duct inlet to the recirculation duct outlet in the recirculation duct then flows or can flow through the goods compartment between the recirculation duct outlet and the recirculation duct inlet.

It is understood that the recirculation duct inlet and the recirculation duct outlet can preferably be arranged in the goods compartment wall in such a way that the recirculation air flow within the goods compartment is formed as desired.

The recirculation duct is preferably closed between the heating device and the recirculation duct outlet, so that the heat that the recirculation air has absorbed at the heating device can be transported as far as possible by the recirculation air into the goods area. This enables very good control of the temperature in the goods area, not to mention relatively high energy efficiency, provided that a suitable design is also present.

In particular, it is advantageous if the recirculation duct is also closed between the recirculation duct inlet and the heating device or also in the area of the heating device, so that the inflow or outflow of air can be reduced to a minimum.

In this case, the circulating air flow is introduced into the goods area from above or the circulating air duct outlet opens downwards into the goods area. This means that the circulating air flow enters the goods area from above and passes over the goods that are presented on the goods presentation board from above. This design ensures in particular that the air flow is only slightly affected by goods that are on the goods presentation board or immediately to the side of it in the goods. In particular, any impairment is reduced to a minimum even with taller goods or larger quantities of goods.

For the same reason, it is also advantageous, regardless of the other combinations of features presented here, if the circulating air flow in a product display for presenting goods that need to be kept warm with a circulating air flow directed into the product area from above is drawn off or discharged from the product area at least halfway up, preferably at least two-thirds of the height of the product area. Accordingly, it is advantageous if the circulating air duct inlet is located at least halfway up, preferably at two-thirds of the height of the product area. In particular, the circulating air duct outlet can also be located at the top of the product area or be provided on the product area ceiling.

Preferably, the circulating air flow flows through the goods area from the user side to the rear. This has the particular advantage that the portion of the circulating air flow which is intentionally or unintentionally leaving the goods area on the user side can be minimized.

Accordingly, it is advantageous if the recirculation duct outlet is located on the user side of the recirculation duct inlet. In particular, the recirculation duct outlet can be provided on the user side of the goods room, while the recirculation duct inlet is provided further towards the rear.

On the other hand, it is conceivable that the recirculation duct inlet is provided towards the rear of the goods room or the goods display, although it is not absolutely necessary that the recirculation duct inlet is located directly on the rear wall of the goods room. Rather, it may be sufficient if the recirculation duct inlet is arranged at a distance of less than half the depth of the goods room, i.e. the extent of the goods room from the user side to the rear wall of the goods room, from the rear wall of the goods room. Preferably, the circulation duct inlet is not more than a third of the depth of the goods room from the rear wall of the goods room. In this way in particular, it can be ensured that the recirculation air can be discharged from the goods room in a targeted manner without an unnecessary amount of recirculation air being lost on the user side.

It goes without saying that the recirculation duct outlet does not necessarily have to be provided directly on the user side of the goods room. Rather, a recirculation duct outlet that is only one third of the goods room depth away from the opening of the goods room on the user side is considered to be a recirculation duct outlet that is provided on the user side of the goods room.

In particular, if the recirculation duct is designed such that the amount of recirculation air entering the recirculation duct via the recirculation duct inlet corresponds to the amount leaving the recirculation duct via the recirculation duct outlet, the amount of recirculation air lost through the opening of the goods compartment on the user side can be kept to a minimum.

It is advantageous if the circulating air flow is heated outside the goods area, as already indicated above. Accordingly, it is particularly advantageous if the circulating air flow is heated inside the circulating air duct.

This can be implemented very easily in terms of construction if the heating device is in thermal contact with the recirculation duct, so that the recirculation duct or the recirculated air in the recirculation duct can be heated by this thermal contact via the heating device. This can also be implemented cumulatively or alternatively if the heating device is let into a recirculation duct wall of the recirculation duct, so that the recirculated air in the recirculation duct can also come into direct contact with the heating device. Even if the heating device is arranged on or opposite a wall area of the goods room wall that extends with a component parallel to the goods presentation panel, heating of the recirculated air in the recirculation duct can be ensured - with a suitable design - if this wall area surrounds a duct area of the recirculation duct, for example.

Depending on the specific design, the heating device can touch the wall of the recirculation duct or even form part of this wall. This also makes it possible to heat the recirculation air outside the goods area in a structurally simple manner.

In particular, a blower included in the circulating air generation means, for example a fan, can be arranged in the circulating air duct, so that the circulating air flow is also generated outside the goods area. With a suitable design of the overall arrangement, the blower can suck in circulating air through the circulating air duct inlet and blow it out again through the circulating air duct outlet. Because the circulating air flow is generated outside the goods area, corresponding circulating air generation means within the goods area can be dispensed with, so that it can be designed to be relatively elegant and optimized in terms of the highest possible product pressure.

The heating device can in particular comprise a heat radiator, preferably an IR radiator. This enables a relatively direct conversion of the energy in order to heat the goods area. In particular, such heat radiators or IR radiators can be electrically operated, which in conjunction with an electrically driven blower or fan requires a structurally simple energy supply, which can then be purely electrical.

Preferably, the heat radiator or the IR radiator, as the name suggests, has a main radiation direction in which the heat or the infrared radiation is essentially emitted.

The heat radiator can preferably be aligned in such a way that its main beam direction is directed into the goods room, onto the goods presentation board, which in particular ensures a high level of effectiveness of the heat radiation. In this way, goods which are on the goods presentation board are heated directly or indirectly without too much of the heat radiation being lost directly through the opening of the goods compartment on the user side.

The direction of the heat emitter in the direction of the goods room or in the direction of the goods presentation panel is particularly advantageous if the corresponding heat emitter is embedded in the goods room wall so that its radiation reaches the goods room directly and can thus be used to heat the goods.

However, a corresponding alignment of the heat radiator can also be advantageous if the heat radiator is directed at the wall area of the goods room wall that extends parallel to the heat presentation plate, so that it cannot radiate directly into the goods room. However, a heat radiator directed in this way can heat this wall area very effectively, particularly if the corresponding wall area of the goods room wall is selected perpendicular to the main beam direction, so that the goods room wall itself can then emit heat radiation very effectively into the goods room.

In particular, if the corresponding wall area extends with a component parallel to the product presentation panel, a possible heat loss through the opening of the product space on the user side can be minimized.

The back of the radiant heater, on the other hand, can, as already suggested above, be cooled by the circulating air flow or heat the circulating air flow, which accordingly increases the effectiveness.

The latter can be implemented in particular if the heat emitter is embedded in or forms part of a recirculation duct wall.

In particular, if the heat radiator is arranged opposite the wall area of the goods room wall which extends with a component parallel to the goods presentation panel, its radiation can directly heat the corresponding wall area.

On the other hand, it is conceivable that the goods room wall is simultaneously used as a recirculation duct wall, so that the heat radiation from the heat emitter not only heats the goods room wall but also the recirculated air that passes the goods room wall outside the goods room in the corresponding recirculation duct. This design also enables a high level of effectiveness in the use of the energy applied to the heat emitter.

The use of an IR radiator as a heat radiator enables a cost-effective implementation of a corresponding product presenter, since such IR radiators can ultimately be found on the market in different sizes and with different outputs at relatively low cost, so that they can then be directly integrated into the product presenter.

As already explained above, the circulating air flow can be guided past a side of the heat emitter that is opposite to the main radiation direction of the heat emitter in order to heat the circulating air flow in this way.

This is particularly advantageous if the heat emitter emits heat radiation directly onto the product display panel and/or into the product area. If this is done indirectly, in which the heat radiation heats a product area wall that is also used as a recirculation duct wall, the energy introduced into the heat emitter is still used relatively effectively.

Accordingly, it can be advantageous for the circulating air flow to be guided past a side of the heat emitter that is directed opposite to the main beam direction, particularly if only the rear side of the heat emitter is located outside the goods area.

In this respect, the goods room wall can comprise a goods room ceiling and a goods room rear wall and the heating device can be embedded in the goods room ceiling and/or in the goods room rear wall. This makes it possible, in a structurally simple manner, to align the heating device or a heat radiator in such a way that the radiation is directed as far as possible in the direction of the goods or the goods presentation panel.

On the other hand, it can also be advantageous to install the heating device in a recirculation duct wall of the recirculation duct, whereby this recirculation duct wall is then located in a duct area which extends with a component parallel to the product presentation plate. In this way, at least part of the recirculation duct wall, particularly if this part of the recirculation duct wall is arranged opposite the heating device or the heat radiator, can be used as a product space wall and heated directly. This directly heated wall area then radiates its heat as effectively as possible into the product space onto the products or onto the product presentation. presentation plate, which also minimizes radiation losses, especially through an opening in the goods room.

In particular, the channel area which comprises the recirculation channel wall in which the heating device is embedded can then be arranged opposite the wall area of the goods compartment wall which extends with a component parallel to the goods presentation plate, so that this channel area then, since it is opposite the corresponding wall area, has a common wall with the goods compartment, via which heat radiation can then be passed into the goods compartment.

As already explained above, the circulating air flow outside the goods area can be successively heated at least twice.

This is particularly easy to implement if the flow direction of the circulating air flow outside the goods area is diverted by 180° and is guided past a heating device before and after. This type of process allows the circulating air flow to be heated twice by the same heating device. By selecting the right flow cross-sections and taking advantage of the natural temperature gradients of the heating device, the heat transfer to the circulating air flow on the one hand and targeted cooling of the heating device on the other can be optimized.

Accordingly, effective heating of the circulating air flow and, in particular, effective multi-sided cooling of the heating device can be ensured if the circulating air duct wall into which the heating device is embedded separates two areas of the circulating air duct with different flow directions of the circulating air flow. This then enables the circulating air flow to be guided past the heating device successively.

Preferably, an opposite flow direction of the recirculating air stream is provided in these areas of the recirculating air duct, which enables a structurally very compact arrangement.

Particularly preferably, the reversal of the flow direction, for example by 180°, takes place in the area of the recirculating air flow generation means, for example in the area of a fan, since there changes in direction can be easily implemented by the fan anyway by selecting a correspondingly suitable fan.

It is understood that the features of the solutions described above or in the claims can also be combined if necessary in order to be able to implement the advantages cumulatively.

• 1 eine perspektivische Ansicht eines ersten Warenpräsenters;
• 2 den ersten Warenpräsenter nach 1 in einem Schnitt entlang der Linie II-II in 3;
• 3 den ersten Warenpräsenter nach 1 und 2 in einer Frontansicht;
• 4 den ersten Warenpräsenter nach 1 bis 3 in einer Aufsicht;
• 5 eine perspektivische Ansicht eines zweiten Warenpräsenters;
• 6 den zweiten Warenpräsenter nach 5 in einem Schnitt entlang der Linie VI-VI in 7;
• 7 den zweiten Warenpräsenter nach 5 und 6 in einer Frontansicht; und
• 8 den zweiten Warenpräsenter nach 5 bis 7 in einer Aufsicht.

Further advantages, objectives and properties of the present invention are explained in the following description of embodiments, which are also shown in particular in the attached drawing. In the drawing:

• 1 a perspective view of a first product presenter;
• 2 the first product presenter after 1 in a section along the line II-II in 3 ;
• 3 the first product presenter after 1 and 2 in a front view;
• 4 the first product presenter after 1 to 3 in a supervision;
• 5 a perspective view of a second product presenter;
• 6 the second product presenter after 5 in a section along the line VI-VI in 7 ;
• 7 the second product presenter after 5 and 6 in a front view; and
• 8th the second product presenter after 5 to 7 in a supervision.

The two in the 1 to 8 The product presenters 10 shown each comprise a product presentation plate 11 with a product space 20 arranged above it, which is provided within a frame 80 of the product presenter 10.

The frame 80 comprises an upper front support 81 and a lower front support 81, a rear wall 82, a top wall 83, a bottom wall 84 and two lateral walls 85.

Accordingly, the product presenter 10 can be assigned a user side 21, a rear side 22 opposite the user side 21, a top side 23 and a bottom side 24 as well as two lateral sides 25 opposite each other.

In this respect, the front supports 81 are located on the user side 21, the rear wall 82 on the back 22, the cover wall 83 on the top 23, the bottom wall 84 on the bottom 24 and the two lateral walls 85 on the lateral sides 25 of the respective product presenter 10.

The frame 80 is also provided with feet 86 and is inherently stable on designed so that up to four such product presenters 10 can be arranged one above the other.

The goods compartment 20 itself has a goods compartment wall 30 and a goods compartment opening 31 on the user side 21.

Depending on the specific implementation, the goods compartment 20 may also be closed, so that a flap or a door may be provided in the area of the goods compartment opening 31, which must be opened by a user in order to be able to remove goods from the goods compartment 20.

In addition, the goods room 20 has a goods room rear wall 32, which is arranged in the direction of the rear side 22 of the goods presenter 10.

At the upper side 23 of the product presenter 10, the product space 20 is delimited by a product space ceiling 33.

The goods compartment 20 also has a goods compartment floor 34 on its underside 24, which in the present case is formed by the goods presentation panel 11. In the case of different embodiments, other implementation types may also be present here.

Two baffles 12 are provided towards the user side 21 and the rear side 22, which serve to minimize contamination and to keep the goods safely on the goods presentation plate 11.

On the lateral sides 25, the goods compartment 20 is delimited by goods compartment side walls 35, whereby in this embodiment, baffles 12 are omitted from the goods compartment side walls 35, although these may be provided in different embodiments.

In the present embodiments, the baffles 12 are designed as transparent glass panes in order to increase the pressure of the goods.

The goods compartment side walls 35, which in turn are provided by the lateral walls 85, are also transparent in this embodiment in order to provide the highest possible goods pressure. In alternative embodiments, transparency may also be dispensed with.

In addition, the goods compartment side walls 35 are each semi-transparently mirrored towards the goods compartment 20, so that the goods compartment side walls 35 in these embodiments are transparent from the outside but reflective from the inside, which further increases the product pressure. In alternative embodiments, mirroring may be omitted if this is not considered necessary.

In the present embodiment, the lateral walls 85 or the goods compartment side walls 35 only make an insignificant contribution to the inherent stability of the frame 80. In alternative embodiments, however, the contribution of the lateral walls 85 or the goods compartment side walls 35 can be increased in this regard if this appears advantageous.

In addition, the rear walls 82 on the respective rear sides 22 can be opened for maintenance purposes and are designed as maintenance covers 89. It is understood that in this regard, different embodiments may also be available without having to deviate from the basic idea that these product presenters 10 implement.

Insulation 87 is provided on the top wall 83, the rear wall 82 and the bottom wall 84 in order to increase thermal efficiency. It goes without saying that the lateral walls 85 can also have insulation if necessary, especially if they are not to be transparent.

In the upper front support 81 of the two embodiments, a product area lighting 13 is arranged, which shines from the user side 21 in the direction of the rear side 22 onto the product presentation panel 11.

In these embodiments, a ventilation 15 is also provided in the upper front support 81 so that the goods compartment lighting 13 does not become too hot. It goes without saying that corresponding ventilation 15 or corresponding openings can be dispensed with if this does not appear necessary.

In addition, an operating and display unit 14 is arranged in the front support 81, via which the functionality of the product presenter 10 can be controlled and checked. A desired temperature can thus be entered via the operating and display unit 14. A temperature display is also provided here.

In both product presenters 10, the product space 20 is flowed through by a circulating air flow 60, which flows from a circulating air duct outlet 52 to a circulating air duct inlet 51 and by circulating air generating means 40, which are implemented in the form of a fan 41, which in both embodiments is designed as a radially driving fan. gate which is arranged in a recess in the insulation 87 on the rear side 22, wherein maintenance work can be carried out on this fan 41 by removing the rear wall 82 or the maintenance cover 89.

A recirculation duct 50 extends from the recirculation duct inlet 51 to the recirculation duct outlet 52, within which the rotor of the blower 41 of the recirculation air generating means 40 is arranged. Accordingly, the recirculation air generating means 40 or the blower 41 are arranged outside the goods area 20 or the recirculation air flow 60 is driven from outside the goods area 20.

In the 1 to 4 In the first product presenter 10 shown, the recirculation duct inlet 51 is arranged approximately in the middle of the product area rear wall 32 and extends to more than half the height of the product area 20.

The second product presenter 10, which is in 5 to 8 As shown, the recirculation duct inlet 51 is arranged directly below the goods compartment ceiling 33.

In both embodiments, the height of the goods compartment 20 can be defined by the distance between the goods compartment floor 34 or goods presentation panel 11 and the goods compartment ceiling 33. The goods compartment width can be defined between the two goods compartment side walls 35, while the goods compartment depth extends from the goods compartment opening 31 to the goods compartment rear wall 32.

In the 1 to 4 In the first product presenter 10 shown, the circulating air flow 60 can therefore be grasped directly from the circulating air duct inlet 51 by the fan 41 and accelerated radially outwards, so that it is initially conveyed upwards in a vertical region of the circulating air duct 50.

The vertical region of the recirculation duct 50 is followed by a duct region 56 which extends with a component parallel to the product presentation plate 11 and initially runs obliquely to the product presentation plate 11, then opens into a horizontal region of the recirculation duct 50 which runs parallel to the product presentation plate 11 and extends to the recirculation duct outlet 52 which is provided on the user side 21 in the front region of the product space 20 and leads into the product space 20 starting from the top side 23.

In both embodiments, the recirculation duct outlet 52 is therefore located in the front quarter of the goods compartment 20, calculated on the total goods compartment depth and significantly above two thirds of the goods compartment height.

In the second embodiment, which is shown in 5 to 8 As shown, the recirculation duct inlet 51 is also located clearly in the rear third of the goods compartment 20, calculated on the depth of the goods compartment 20, and clearly above two thirds of the goods compartment height. Such an arrangement enables the recirculation air flow 60 to circulate from the recirculation duct outlet 52 to the recirculation duct inlet 51 through the goods compartment 20 even when the goods compartment 20 is relatively heavily loaded.

Since the recirculation duct inlet 51 of the first, in 1 to 4 Since the illustrated product presenter 10 has openings above half the height of the product space 20, the latter is essentially also ensured in this embodiment.

The recirculating air duct 50 is surrounded by recirculating air duct walls 53, wherein, as seen from the recirculating air duct 50, the recirculating air duct wall 53 towards the goods compartment 20 is provided by the same assembly that also forms the goods compartment wall 30. In different embodiments, two separate assemblies and/or insulation layers can also be provided here if necessary.

From the recirculation duct inlet 51 to the fan 41, the 5 to 8 The second product presenter 10 shown also has a supplementary area of the circulating air duct 50, which initially extends downwards at an angle with a component parallel to the product presentation plate 11, and then extends vertically downwards parallel to the rear wall 32 of the product area to the blower 41. There, the circulating air duct wall 53 on the blower side has openings so that the blower 41 can take in the circulating air of the circulating air flow 60 from this vertical area of the circulating air duct 50 and accelerate it upwards into the area of the circulating air duct 50 running towards the rear side 22.

Both product presenters 10 have a heating device 70 which is located in the channel region 56 which extends with a component parallel to the product presentation plate 11 and reaches from the fan 41 to the recirculation channel outlet 52. The heating device 70 is embedded in the recirculation channel wall 53 on the product area side of this channel region 56 which extends with a component parallel to the product presentation plate 11 and reaches from the fan 41 to the recirculation channel outlet 52.

In both embodiments, the heating device 70 is designed as a heat radiator 71, in particular as a commercially available IR radiator 72. which can emit heat rays 73 along a main beam direction 29.

By arranging the heating device 70 in the channel region 56, which extends with a component parallel to the product presentation plate 11 and reaches from the fan 41 to the recirculation channel outlet 52, the recirculation air flow 60 can cool the rear side of the heating device 70, which in itself cannot emit heat rays in a directed manner, the heating device 70, so that in this way overheating can be avoided and the recirculation air flow 60 can be heated.

In the 1 to 4 In the first product presenter 10 shown, the heating device 70 is also embedded in a wall region 36 which extends with a component parallel to the product presentation plate 11 and which simultaneously also represents a channel region 56 of the circulating air channel wall 53 which extends with a component parallel to the product presentation plate 11, and is directed with its main beam direction 29 towards the product presentation plate 11. Due to this orientation, the heating device 70 can directly heat any goods located on the product presentation plate 11 with its heat rays 73, whereby radiation losses, in particular through the product space opening 31, can be minimized.

In the 5 to 8 In the second product presenter 10 shown, however, in the main beam direction 29 of the heat radiator 71, the channel region 56 is provided in front of the product space 20, which extends with a component parallel to the product presentation plate 11 and reaches from the recirculation channel inlet 51 in the direction of the channel region leading vertically downwards, which in turn has a recirculation channel wall 53 towards the product space 20, which at the same time represents the wall region 36 of the product space wall 30 extending with a component parallel to the product presentation plate 11.

In this way, in the second product presenter 10, the circulating air flowing into the circulating air duct 50 through the circulating air duct inlet 51 is first heated directly by the heat radiator 71 when it flows through the duct region 56, which extends with one component parallel to the product presentation plate 11 and reaches from the circulating air duct inlet 51 in the direction of the fan 41, to then pass through the heating device 70 a second time when the circulating air from the fan 41 flows through the duct region 56, which extends with one component parallel to the product presentation plate 11 and is located between the fan 41 and the circulating air duct outlet 52, in the circulating air duct wall 53 on the product compartment side of which the heating device 70 is arranged.

In addition, the heat rays 71 heat the wall region 36 of the goods compartment wall 30, which extends with a component parallel to the goods presentation plate 11, which in turn can emit heat to the goods compartment 20 essentially in the main beam direction 29, so that the goods compartment 20 can be indirectly heated additionally by the infrared rays of the heat radiator 71. Here too, radiation losses through the goods compartment opening 31 can be reduced because the goods wall region 36, which extends with a component parallel to the goods presentation plate 11, is inclined with respect to the goods compartment opening 31.

List of reference symbols:

10

Product presenter

11

Product presentation board

12

Baffle

13

Merchandise room lighting

14

Control and display unit

15

Ventilation for goods room lighting

20

Goods room

21

User page

22

back

23

Top

24

bottom

25

Lateral side

29

Main beam direction

30

Goods room wall

31

Goods room opening

32

Merchandise room rear wall

33

Merchandise room ceiling

34

Goods room floor

35

Goods room side wall

36

Wall area with a component extending parallel to the product presentation panel

40

Recirculation air generation means

41

Blower

50

Recirculation duct

51

Recirculation duct inlet

52

Recirculation duct outlet

53

Recirculation duct wall

56

Channel area with a component extending parallel to the product display panel

60

Recirculating air flow

70

Heating device

71

Heat lamps

72

IR emitters

73

Heat rays

80

frame

81

Front carrier

82

Back wall

83

Cover wall

84

Sub-wall

85

Lateral wall

86

Stand

87

Isolation (exemplarily quantified)

89

Maintenance cover

Claims (18)

Product presenter (10) for presenting products to be kept warm, with a user side (21), a top side (23), a bottom side (24), a rear side (22) opposite the user side (21) and two lateral sides (25) opposite one another, as well as with a product space (20) accessible from the user side (21), which is located above a product presentation plate (11), which is delimited at least on the rear side (22) and the top side (23) by a product space wall (30) and in which the products to be kept warm can be arranged, and with circulating air generating means (40) for generating a circulating air flow (60) flowing through the product space (20) and guided from a circulating air duct inlet (51) to a circulating air duct outlet (52) opening downwards into the product space (20) in a circulating air duct (50), characterized in that a heating device (70) (i) is installed in the product space wall (30) and is in thermal contact with the recirculation duct (50), and/or (ii) is embedded in a recirculation duct wall (53) of the recirculation duct (50), and/or (iii) is arranged on or opposite a wall region (36) of the goods compartment wall (30) which extends with a component parallel to the goods presentation plate (11). Product presenter (10) by Claim 1 , characterized in that the recirculating air duct (50) is closed between the heating device (70) and the recirculating air duct outlet (52) and/or that the recirculating air duct wall into which the heating device (70) is embedded separates two regions of the recirculating air duct (50) with different, preferably opposite, flow directions of the recirculating air flow (60). Product presenter (10) by Claim 1 or 2 , characterized in that the goods compartment wall (30) comprises a goods compartment ceiling (33) and a goods compartment rear wall (32) and the heating device (70) is embedded in the goods compartment ceiling (33) and/or in the goods compartment rear wall (32). Product presenter (10) according to one of the Claims 1 until 3 , characterized in that the recirculating air duct wall (53) of the recirculating air duct (50) has a duct region (56) into which the heating device (70) is embedded, wherein this duct region (56) extends with a component parallel to the goods presentation plate (11) and/or is arranged opposite the wall region (36) of the goods compartment wall (30) extending with a component parallel to the goods presentation plate (11). Product presenter (10) according to one of the Claims 1 until 4 , characterized in that the heating device (70) comprises a heat radiator (71), the main beam direction (29) of which is preferably directed into the goods compartment (20) and/or onto the goods presentation plate (11) and/or preferably onto the wall region (36) of the goods compartment wall (30) extending with a component parallel to the goods presentation plate (11) and/or which preferably comprises an IR radiator (72). Product presenter (10) according to one of the Claims 1 until 5 , characterized by a fan (41) arranged in the recirculation duct (50) and enclosed by the recirculation generating means (40). Product presenter (10) according to one of the Claims 1 until 6 , characterized in that the recirculation duct outlet (52) opens from the front into the goods compartment (20) and/or that the recirculation duct inlet (51) is located at the rear, preferably at the rear and top, in the goods compartment wall (30). Product presenter (10) according to one of the Claims 1 until 7 , characterized by exactly one product presentation panel (11) in the product space (20). Product presenter (10) according to one of the Claims 1 until 8th , characterized in that the goods space (20) is surrounded by a self-supporting frame (80), which preferably only surrounds exactly one goods space (20) in a self-supporting manner. Product presenter (10) by Claim 9 , characterized in that the self-supporting frame (80) forms a presenter module and at least two such presenter modules are assembled to form the product presenter (10). Product presenter (10) according to one of the Claims 1 until 10 , characterized in that a protective air flow is provided outside the circulating air flow (60). Method for presenting goods to be kept warm within a goods space (20) of a goods presenter (10) located above a goods presentation plate (11) with a user side (21), a top side (23), a bottom side (24), a rear side (22) opposite the user side (21) and two lateral sides (25) opposite one another, as well as with the goods space (20) accessible from the user side (21), which is located above a goods presentation plate (11), which is delimited at least on the rear side (22) and the top side (23) by a goods space wall (30) and in which the goods to be kept warm can be arranged, which is delimited by a goods space wall (30) and through which a circulating air flow (60) introduced into the goods space (20) from above flows, characterized in that (i) the goods space (20) or the goods are heated by a heating device embedded in the goods space wall (30). (70) which heats the circulating air flow (60) outside the goods area (20) and/or is cooled by the circulating air flow (60) from outside the goods area (20), is heated directly; and/or (ii) that the circulating air flow (60) is heated within a channel region (56) of a circulating air channel (50) which extends with a component parallel to the goods presentation panel (11); and/or (iii) that the circulating air flow (60) outside the goods area (20) is successively heated at least twice. Procedure according to Claim 12 , characterized in that the circulating air flow (60) outside the goods space (20) is deflected by 180° in its flow direction and is guided past a or the heating device (70) before and after. Procedure according to Claim 12 or 13 , characterized in that the heating device (70) comprises a heat radiator (71) which preferably emits heat rays (73) directed onto the product presentation plate (11) and/or into the product space (20), which preferably has a main beam direction (29), wherein the circulating air flow (60) is guided past a side of the heat radiator (73) directed opposite to the main beam direction (29), and/or which is directed onto the channel region (56) of a circulating air channel (50) which extends with a component parallel to the product presentation plate (11). Procedure according to one of the Claims 12 until 14 , characterized by exactly one product presentation panel (11) in the product space (20). Procedure according to one of the Claims 12 until 15 , characterized in that the goods space (20) is surrounded by a self-supporting frame (80), which preferably only surrounds exactly one goods space (20) in a self-supporting manner. Procedure according to Claim 16 , characterized in that the self-supporting frame (80) forms a presenter module and at least two such presenter modules are assembled to form the product presenter (10). Method according to one of the Claims 12 until 17 , characterized in that a protective air flow is provided outside the circulating air flow (60).

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