ES2506267T3 - Refrigerator cabinet - Google Patents

Abstract

Refrigerating unit, in particular a refrigeration shelf for the refrigeration and presentation of the products (2), with a body (3) and with at least one support of the products (1) arranged therein, in addition to at least one veil of cooling air (12, 13) leaving a cooling air channel (10) in the body (3) at its supply air outlet (8) as well as circulating along a hole in the body (4) up to a return air inlet (14), and with a rear wall of the product compartment (17) at least partially perforated as well as crossed by the cooling air stream (24, 25) generated by at least one fan ( 11) in the direction of the body hole (4), characterized in that the cooling air channel (10) has at least one separating plate (20, 20 ') on the side of the head in the body (3) dividing the cooling air stream (24, 25) with bypass zone (21) drilled on the exit side.

Description

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DESCRIPTION

Refrigerator cabinet

The invention relates to a refrigerator, in particular a refrigeration shelf for the refrigeration and presentation of the products, with a body and with at least one support of the products arranged therein, in addition to at least one veil of cooling air leaving a cooling air channel in the body at its supply air outlet as well as circulating along a hole in the body to a return air inlet, and with a rear wall of the product compartment at least partially perforated as well as crossed by the cooling air stream generated by at least one fan in the direction of the body hole, in which the cooling air channel has at least one side of the body in the body a sheet of separation that divides the cooling air stream. Such a refrigerating unit is known, for example, from WO 2010/068367 A1.

A cooling unit of the structure described at the beginning is also described in DE 10 2004 033 071 A1. The known cooling shelf has a perforated rear wall of the product space, through which cooling air circulates to the product space in front of the circulation side. Alternatively or additionally, a veil of cooling air is circulated along a hole in the product space. In this way, at least a partial flow of the circulation air is conducted on at least one support of the products in the area of a front front of the respective support of the products.

The veil of cooling air deviates, in general, in the direction of the product space. In this way, the most uniform distribution of the cooling air within the cooling shelf can be achieved. To this end, in a complementary way, the supports of the products or the presentation funds of the products are hermetically connected to the air with the perforated rear wall of the space of the products.

In another state of the art according to DE 10 2004 006 280 A1 a cooling shelf is described, which has at least one bottom of the product space and / or behind the rear wall of the product space at least a heat exchanger At least two air cooling channels are made in the direction of the circulation in front of or behind the heat exchanger. Partial currents of a cooling air stream are conducted through the cooling air channels. A distribution of the quantity of partial cooling air currents can be made with the aid of a variable inlet opening with respect to its size. In this way, a cooling rack can be retrofitted for other temperature groups and, consequently, for other products for presentation.

Finally, it belongs to the state of the art, in principle, still a cooling unit, as described in DE 20 2010 011 031 U1. In this place a plate heat exchanger is made, with the aid of which refrigerant or cooling agent evaporates and the resulting evaporation cold is used for cooling the cooling shelf. The heat exchanger is disposed in this context typically outside the cooling rack and is connected to it through ducts.

The prior art cannot be satisfactory in all aspects. Thus, for example, there are already proposals to reduce energy consumption in such refrigerating furniture and in particular in refrigeration shelves. Indeed, in fact, the known refrigeration shelves with opening of the large surface body for the extraction of the products from the corresponding support of the products or for their equipment are especially comfortable for the customers. Since in opposition to the refrigeration shelves with doors, the products can be extracted directly and, in particular, without having to open a door. As a consequence, the sale in such "open" refrigeration shelves is higher than in "closed" refrigeration shelves.

By virtue of the opening of the necessarily existing and large surface body, however, a large amount of energy is consumed in the "open" cooling shelves, which is manifested mainly by the fact that between the space of the products inside the body and , for example, an adjacent space or store of a relatively large temperature is observed, which is typically in the range of about 20 ° C. In this way, a temperature compensation is forced, which should be designed as low as possible, to reduce energy consumption and thus the operating costs. For this reason, the teachings that form the type work, on the one hand, with the veil of cooling air already described and circulating along the opening of the body and, on the other hand, with the cooling air circulating from the same way along the support of the products. In this context, the supports of the products or the presentation funds of the products are tightly connected to the air with the rear wall of the space of the products, which is especially expensive in terms of construction and, consequently, It is expensive. Apart from that, the veil of cooling air that circulates along the opening of the body reduces, in effect, the exchange of air between the space of the products and the environment, but the

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deflection of the cooling air veil in the direction of the product space leads to turbulence, which again favors the exchange of air and, consequently, raises energy consumption. Here the invention will create aids in general.

The invention is based on the problem of developing a refrigeration cabinet and in particular a cooling shelf of the structure described at the beginning, in such a way that taking into account an economical solution in terms of construction, consumption is reduced at the same time of energy

For the solution of this approach of the technical task, a refrigeration unit of the type indicated at the beginning is characterized in the context of the invention because the cooling air channel has at least one side of the body in the body a sheet of separation that divides the cooling air stream with perforated bypass zone on the outlet side.

Within the framework of the invention, the cooling air veil leaving the feed air outlet is therefore divided into two veils of cooling air. In fact, it can distinguish between an inner veil of the cooling air and an outer veil of the cooling air. The inner veil of the cooling air is directed towards the space of the products, while the outer veil of cooling air points in the direction of the environment, for example to a store premises, in which the respective refrigeration furniture is installed .

The separation of the cooling air stream in the cooling air channel in the inner cooling air veil and the outer cooling air veil is carried out at least on the side of the head in the body. In principle, a separation can also be made in the two veils of cooling air on the side of the head and on the rear side on the body. For this purpose, at least one separation plate is provided that divides the cooling air stream. The separating plate has the deflection zone already described and drilled on the exit side. In fact, the respective deflection zone is located, at least on the extreme side of the circulation, on a guide element that closes the supply air outlet of the cooling air channel. In this guide element it can be an air vent of another element, which guides and conducts the respective cooling air stream therethrough. Typically, the guide element is concerned that the cooling air stream leaving the guide element at the feed air outlet describes a predominantly laminar circulation. In detail, the deflection zone is connected most of the time on the end side of the separation plate. The separating plate is - as already explained - at least on the side of the head in the body of the refrigeration unit according to the invention and divides the cooling air channel provided in this place approximately in half. To now conduct the guided cooling air along the cooling air channel on the side of the head in the body through the supply air outlet, the deflection zone is provided, on the one hand, and another part, the bounce plate.

In fact, the deflection zone is mainly concerned that the inner veil of cooling air is driven through the supply air outlet and through the guide element provided there and is deflected in the direction of a circulation along of the body hole. Instead, the rebound plate that closes the cooling air channel on the end side ensures that the opposite upper partial current is diverted from the cooling air stream. This upper partial current corresponds to the outer veil of cooling air. On the other hand, the internal partial current of the cooling air stream leaves, after its deflection with the aid of the deflection zone, the supply air outlet as the inner veil of cooling air.

The deflection zone as such is essentially formed of two parts with a roof type edge and with a deflection fin connected thereto. Since the deflection zone is perforated on the outlet side, a desired intimate mixture is produced in this area between the lower partial stream for the realization of the inner veil of cooling air and the upper partial stream as the basis for the outer veil of cooling air In the perforations they are longitudinal grooves that extend along a cross section of the circulation. Most of the time, the longitudinal grooves in question are aligned vertically - with respect to the cross-section of the circulation of the cooling air stream -.

The roof type edge works regularly as resistance to circulation and penetrates the upper partial stream of the cooling air stream. In this way the upper partial current of the roof type edge is narrowed and an acceleration of the upper partial current occurs. The deflection fin connected at the edge of the roof type as a component of the deflection zone ensures that the lower partial current of the cooling air stream is deflected at an angle and in particular at an obtuse angle. In the general case, the deflection fin has the longitudinal grooves already described as perforations of the deflection zone.

As already explained, the deflection zone appears, in general, on the extreme side of the circulation on the guide element that closes the supply air outlet of the cooling air channel. In this case, a design is regularly performed such that a ridge on the exit side of the deflection zone divides the guide element approximately in half in the cross section.

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This provides a particularly favorable guide to the circulation of the cooling air stream. Since this cooling air stream is divided firstly once and in principle with the aid of the separating plate with perforated deflection zone on the outlet side in the upper partial current and the lower partial current. The upper partial current exits through the supply air outlet as an outer veil of cooling air.

The lower partial current, on the other hand, defines the inner air veil after passing the guide element in the supply air outlet. Since the two veils of air circulate, respectively, in a predominantly laminar manner, a mutual influence is reduced to a minimum. In addition, the outer veil of cooling air functions, as it were, a buffer between the inner veil of cooling air and the ambient air, so that heat exchange between the ambient air and the ambient air is minimized. cooling air veil, in general, or in particular the inner cooling air veil. In this way, energy generation costs are reduced at the same time. The perfect and particularly turbulence-free conduction, on the one hand, of the inner veil of the cooling air and, on the other hand, of the outer veil of the cooling air, is achieved through the combination of the deflection zone with the perforations on the outlet side in combination with the bounce plate that closes the cooling air channel on the end side. In fact, the deflection zone is first configured once in such a way that it deflects the lower partial current of the obtuse angle cooling air stream. This obtuse angle deviation is performed at the same time in the area of the roof type edge, which represents for the lower partial current, so to speak, a deviation zone and thus prevents backwaters of the cooling air or of the lower partial current in the deviation zone.

The perforations in the deflection fin point in the same direction. That is, the deflection fin deals, on the one hand, with the obtuse angle deviation of the lower partial current and, on the other hand, that at least a part of the lower partial current can circulate through the perforations. in the upper partial stream. In this way, backwaters and turbulence are avoided in the lower partial current.

The cooling air that passes through the perforations or the longitudinal grooves in the deflection fin of the lower partial current now affects the upper partial current beyond the deflection fin. Here, it is available, so to speak, an expansion space for the upper partial current, which has previously gone through the edge of the roof type as resistance to circulation. This expansion space stabilizes, on the one hand, the circulation of the upper partial current and, on the other hand, receives the cooling air, which passes through the perforations, of the lower partial current. The expansion space is closed by means of the rebound plate that closes the cooling air channel on the extreme side, which at the same time deflects the upper partial current. The same as the lower partial current, also the upper partial current deviates mostly in the form of an obtuse angle and, in particular, from its previous development mostly horizontally along the separation plate in a deviated development in the form of an obtuse angle through the guide element in the supply air outlet. In this way, in each case an inner veil of cooling air and an outer veil of cooling air leave the feed air outlet with optimized circulation behavior. In fact, both cooling air veils are designed predominantly free of turbulence, so that eventual heat exchange with the ambient air is minimized.

To this we must add that the separation plate including the deviation zone of the end side are designed the same as the bounce plate as simple metal plates or plate plates or can be manufactured from them through simple transformation of the sheet or mechanization of the sheet. This keeps manufacturing costs reduced.

As already mentioned, the two partial currents of the cooling air stream are diverted in the direction of the guide element at the supply air outlet, respectively, in the form of an obtuse angle from a predominantly horizontal previous development to a development in right angle or almost right angle. The fact that the guide element is inclined in the direction of the opening of the body in front of the separation plate contributes to this. In fact, for the two partial currents a deviation is observed taking into account an angle of approximately 100º to 120º. The inclination of the guide element contributes to this. Since this is inclined with respect to the separation plate that extends mostly horizontally about 20 ° in the direction of the opening of the body. In this way, both the inner veil of cooling air and the outer veil of cooling air are directed in the direction of the opening of the body. This is explained by virtue of the fact that the feed air outlet closed with the aid of the guide element is arranged towards the body of the body opening on the side of the head in the body. Since, in the direction of the opening of the body, a lighting medium or a corresponding fixing support for a lighting medium as well as a shutter housing is connected most of the time in the supply air outlet. To the extent of the construction width of the shutter housing plus the illumination means, the supply air outlet to the body from the body opening is removed. This distance with respect to the edge of the body side of the body opening is compensated by the invention because both cooling air veils, which leave the cooling air outlet, exit from the guide element inclined in the direction of the opening of the body. In this case, in general, a

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design such that both veils of cooling air circulate taking into account the superficial expansion of the body opening despite everything and on the extreme side of the body opening to the return air inlet, which is arranged at the edge or well in the song of the opening of the body.

This return air inlet is constituted, on the other hand - in the same way as the bypass zone already treated - of two pieces. In fact, the return air inlet is composed of a guide projection on the side of the product space and a perforation surface that is connected thereon on the side of the body opening. The guide projection on the space side of the products serves to guide the cooling air veil and insert it at the same time into the return air inlet. To this end, the guide projection is tilted backwards in comparison with the opening of the body and, therefore, takes into account the development in some way inclined to an insignificant extent of the two veils of cooling air along the body opening

The perforation surface, which is connected to the guide projection on the side of the body opening, has the same way of longitudinal grooves. These longitudinal grooves are aligned in the same manner as the longitudinal grooves in the deflection zone or in the deflection fin as a component of the deflection zone along the cross-section of the circulation. In fact, in this case it is again a question of vertical aligned longitudinal grooves compared to the cross section of the circulation. In this way, it is ensured that the longitudinal grooves extend, on the one hand, from the deflection zone or its deflection fin and, on the other hand, from the perforation flange of the cooling air inlet essentially parallel to each other. . In addition, the respective longitudinal grooves are arranged in each case vertical compared to the cross section of the circulation. This avoids eventual turbulence in this area, the longitudinal grooves extend rather along respective circulation threads. According to another advantageous configuration, the at least one fan that drives the cooling air stream within the cooling air channel is inclined compared to its essentially vertical alignment in the area of the perforated rear wall of the product space. . This means that one

or several fans are normally in the area of the cooling air channel in the region of its vertical alignment. This vertical alignment of the cooling air channel is typically observed in the area of the perforated rear wall of the product space.

In fact, the fan or the fans - in a manner similar to that described in DE 10 2004 006 280 A1 - ensures that the cooling air is conducted in the circuit through the body, on the one hand, and throughout the opening of the body, on the other hand. In this way, the cooling air passes through a heat exchanger or evaporator, in front of which one or several fans are typically connected.

The fan disposed within the cooling air channel in its vertical alignment is inclined according to the invention. In fact, the fan has an inclination in front of the vertical towards a rear wall of the body. Typically, there are inclinations in front of the vertical of approximately 10º. However, this is not mandatory. Since according to its inclination, the fan transports a part of the cooling air stream through the perforated rear wall of the product space or through the rear wall of the product space and a part of the cooling air flow to the supply air outlet. Expressed in another way, the fan deals with its inclination that the entire cooling air stream undergoes a first division into a partial stream transported in the direction of the supply air outlet and another partial stream, which enters through of the perforated rear wall directly in the space of the products. Another second division then takes place - as already described - on the side of the head in the body with the aid of the separating plate with the perforated deflection zone on the exit side. Also in this case, the division or the first division is achieved in a particularly simple way in terms of construction because the fan or the plurality of fans are retained in the cooling air channel by a sheet plate configured so corresponding and easy to machine.

The partial stream of the cooling air stream, which leaves the partially perforated rear part of the product space, after the first division is configured such that said partial stream circulates and can also circulate on each individual product holder and Present. In this way, the products that are on the support of the products are cooled in an optimal way. Depending on the size, quantity and position of the perforations of the perforated rear wall of the product space, another subdivision can be made, in such a way that the flow of cooling air circulating on the respective support of the products is adapted to the requirements specific. In this way, the supports of the products that are in the area of a bottom of the body with a larger volumetric amount of cooling air can be propelled than the supports of the products that are above and provided on the side of the head in the body. This can be done because the cross section provided, in general, by the perforations in the area of the lower supports of the products is configured larger than in the area of the upper supports of the products.

This design takes into account the fact that the cooling air veil rises from the outlet of

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supply air along the opening of the body to the inlet of return air by virtue of unavoidable compensation effects with respect to the temperature with the surrounding space with respect to its temperature at about 2 ° C. For example, in the area of the supply air outlet temperatures of the cooling air veil can be observed in the range of 0 ° C to 2 ° C, instead the temperature in the area of the return air inlet rises or can be raise up to 3 ° C to 5 ° C. To compensate for this, the bottom supports of the products typically undergo enhanced cooling with the aid of the cooling air stream entering through the perforated rear wall of the product space.

In the result, a refrigerator cabinet is provided and in particular a refrigeration shelf, which with a simple structure provides optimal cooling air conduction, which implies special energy saving effects. This can be explained essentially by the combination of the turbulence-free deviation of the two cooling air veils generated during the exit from the supply air outlet and at the same time the guided aspiration in the area of the return air inlet . To this, it should be added that at the same time the product supports undergo a separate cooling through a stream of cooling air that circulates from the perforated rear wall of the product space.

In this case, a first division is made in the partial stream conducted towards the supply air outlet and the partial stream that leaves the perforations in the rear wall of the product space the same as the second division in the inner air veil of cooling and the outer veil of the cooling air, respectively, with the help of flat metal or simple mechanized sheet plates, so that it is constituted simple in construction and economical.

The invention is explained in detail below with the help of a drawing that represents only one embodiment; in this case:

Figure 1 shows a refrigerator or a shelf according to the invention in a perspective view, partially in section.

Figure 2 shows the object according to figure 1 in the cross section.

Figure 3 shows a partial perspective view of the cooling unit according to Figure 1, partially in section.

Figures 4A and 4B show fragments of detail of Figure 2 in the area of the supply air outlet and the return air inlet.

Figure 5 shows the separation plate with perforated deflection zone on the exit side in different views.

Figure 6 shows the return air inlet in a perspective view.

Figure 7 shows the perforated rear wall of the product space in different views and

Figure 8 shows the arrangement and fixing support of the fans in detail.

The figures show a refrigerator, in which in the example of embodiment it is a cooling shelf. The cooling shelf has several supports of the products 1 only indicated in the sectional representation according to figure 2, on which products 2 are placed, to cool them and present them. The cooling shelf has for this purpose a body 3, which is configured in accordance with the sectional representation in figure 2, generally U-shaped and has an opening of the body 4 between two arms of the U 3a, 3b as well as a base of the U 3c.

The lower arm of the U 3a represents the bottom of the body 3a. The upper arm of the U 3b corresponds to the head of the body 3b, while the base of the U 3c represents the rear wall of the body 3c. The opening of the body 4 can be moved with the help of a blind or night blind 5 indicated only in Figure 2. The blind 5 is received in a blind housing 6. In addition, a lighting means 7. is still recognized. shutter housing 5 and the lighting means 7 have a total construction width B, which represents the value B, to the extent that a supply air outlet 8 moves, spaced inwards from the opening of the body 3 towards indoors. In contrast, a return air inlet 14 has no displacement compared to the opening of the body 4.

To the basic structure of the cooling shelf there is still an evaporator or a heat exchanger 9, with the aid of which a stream of cooling air 24, 25 conducted along a cooling air channel 10 is cooled. cooling air 10 is composed of two predominantly horizontal zones 10a, 10b and a vertical zone 10c. The horizontal zone 10a of the cooling air channel 10 is arranged at the bottom of the body 3a. The other horizontal zone 10b of the cooling air channel 10 is located in the head of the body 3b. The vertical zone 10c of the cooling air channel 10 is arranged in the rear wall

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of the body 3c.

In the vertical zone 10c of the cooling air channel 10 there is the evaporator 9 or the heat exchanger 9 already described for cooling the cooling air stream 24, 25. Furthermore, in this vertical zone 10c they are located here. a fan or several fans 11 (see figures 2 and 8). The individual fans 11 are connected in front of an evaporator or heat exchanger 9. With the help of the fans 11, cooling air is finally conducted in the circuit and leaves from the supply air outlet 8 and defines a veil of cooling air 12, 13 leaving the supply air outlet 8 as well as circulating along the opening of the body 4. In fact, within the framework of the embodiment example, an inner veil of cooling air 12 and a outer cooling air veil 13. The cooling air veil 12, 13 circulates to the return air inlet 14 and from there through the horizontal zone 10a of the circulation air channel 10 and to the fans 11. From there, the cooling air stream 24, 25 passes the evaporator either the heat exchanger 9 and reaches the head of the body 3b or the other horizontal zone 10b of the cooling air channel geration 10 to then exit again from the supply air outlet 8.

The evaporator or heat exchanger 9 can be connected through conduits with a compressor not shown or with a condenser 15. With the help of the compressor, the cooling medium is compressed and conducted to the condenser 15. Here the cooling medium and is then conducted, for example, through a throttle to reduce the pressure towards the evaporator or plate heat exchanger 9. In the evaporator or plate heat exchanger 9 the refrigerant is evaporated or either cooling medium and the evaporation cold that results in this case is used for cooling the cooling air stream 24, 25. The cooled and liquid cooling medium then arrives again at the compressor and is compressed and heated as it is then liquefied in the condenser 15. The working mode can be performed in this case in a similar way to the working mode of in accordance with DE 20 2010 011 931 U1, deviations from them being obviously also possible and being understood by the invention. The condenser 15 is recognized in Figure 2. However, this is not necessarily a component of the refrigerated furniture shown, but can also be designed and installed separately from it.

The body 3 generally comprises a space for the products 16, within which the supports of the individual products 1 with the products 2 located therein are placed and placed. The space of the products 16 is open in the direction of the opening of the body 4 and is closed in the exemplary embodiment by means of a rear wall at least partially perforated in the space of the products 17. Since the rear wall of the space of the products products 17 is at least partially perforated, at least a part of the cooling air stream 24, 25 generated through the or of the fans can circulate through the perforations and can be led to the space of the products 16 in the direction of the opening of the body 4 and, specifically, along the supports of the products 1 (see the arrow of points and strokes in figure 2). In reality, the cooling air stream 24, 25 experiences a first division in the area of the at least partially perforated wall of the product space 17. Since the partial stream of the cooling air stream 24, 25 enters through the perforations 18, which can be recognized especially in Figure 7, in the space of the products 16. On the other hand, another partial stream is transported forward in the direction of the supply air outlet 8.

With the help of figure 7 it is recognized that the at least partially perforated wall of the product space 17 is equipped as a hanging wall with suspension pivots 19. Furthermore, in the rear wall of the product space 17 it is a plate metal or sheet metal plate, which is manufactured through simple stages of sheet metal machining and, therefore, is especially economical. In the individual perforations 18 these are longitudinal grooves, which are aligned in each case parallel to the longitudinal expansion of the supports of the products 1. In this way it is ensured that the cooling air stream 24, 25 that enters through the perforations 18 in the space of the products 16 form or define individual current wires, which circulate on the support of the respective products 1 and here cause especially efficient cooling of the products 2 that are there.

Through the regular placement of the perforations 18, seen over the entire length and width of the rear wall of the space of the products 17, it is ensured that each individual product holder 1 is driven with the aid of the cooling air stream 24, 25 that goes through the perforations 18. In addition, the number and shape as well as the size of the perforations 18 are adapted to the real particularities. Thus, for example, it is recognized in the area of the base side of the rear wall of the space of the products 17 that in this area a plurality of perforations 16 are observed or an especially large outlet cross-section is provided through the perforations 18 for the cooling air stream 24, 25. Thus, the volumetric cooling air stream in the edge area of the base side of the rear wall of the product space 17 or in the area The base of the body 3a is especially large (see Figure 7). This circumstance takes into account the fact that typically the temperature of the cooling air veil 12, 13 rises from the supply air outlet 8 to the return air inlet 14, so that the elevated temperature of the air veil of cooling 12, 13 in the area of the return air inlet 14 is taken into account

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by a high volumetric flow of the cooling air through the perforations 18 in this area and the heating is counteracted, so to speak.

In addition, the fact that the cooling air channel 10 has at least one side of the head in the body 3 or in the head of the body 3b a separating plate 20 that divides the air flow is of particular inventive importance cooling 24, 25 with deflection zone 21 perforated on the outlet side (see figure 3). In addition to the separation plate 20 on the head of the body 3b, another separation plate 20 'may be additionally made on the side of the rear wall or in the area of the rear wall of the body 3c, as indicated in the figure 2. For the configuration of the cooling air stream 24, 25 or the functions described below, the other separation wall 20 'is of rather reduced importance.

The separation plate 20 provided on the head of the body 3b including the deflection plate 21 on the front side is shown in detail in Figure 4A. In a complementary way, reference is made to Figure 3, which shows a perspective view. With the aid of the last figure 3 mentioned in combination with figure 4A it is recognized that the deflection zone 21 appears on the end side of the separation plate 20 on the end side of the circulation on a guide element 22. In the guide element 22 can be an air outlet honeycomb

22. In addition, it has been decided that a edge 23 on the extreme side of the current of the deflection zone 21 divides approximately the guide element 22 in question in the cross section. In this way, a total upper stream 24 of the cooling air stream 24, 25 and a lower partial stream 25 are formed in total (see Figure 4A).

The upper partial stream 24 of the circulating air stream 24, 25 arrives after passing the guide element 22 to the outer veil of the cooling air 13 or defines this veil. In contrast, the lower partial current 25 corresponds to the inner veil of cooling air 12. The deflection zone 21 and the separating plate 20 generally form a construction unit 20, 21 shown in detail in Figure 5. In This construction unit 20, 21 is again a metal sheet or a sheet metal plate manufactured with standard sheet metal machining methods, which can therefore be produced especially economically. With the aid of the representation in Figure 4A it is recognized in a complementary manner that the deflection zone 21 is essentially equipped with two parts with edge 21a of the type of roof and deflection fin 21b connected therein. The deflection fin 21b has the perforations 26 already described, which can be recognized especially in the representation according to Figure 5. In fact, in the exemplary embodiment only the deflection fin 21b is equipped with the perforations 26 in question, in the which is about equal spaced longitudinal slots 26. These longitudinal grooves 26 are aligned essentially vertically with respect to a cross section of the circulation Q described by the cooling air stream 24, 25 (see Figure 2). The same applies in a comparable manner for longitudinal grooves 31, which are still described in detail below in the return air inlet 14.

The edge 21a of the roof type of the deflection zone 21 penetrates, as shown in Figure 4A, in the upper partial stream 24 of the cooling air stream 24, 25. In this way, the upper partial stream 24 experiences in the area of the edge 21a the type of roof a narrowing, so that in this area there is an acceleration of the upper partial current 24. In the direction of the circulation behind the edge 21a of the type of roof an expansion space is connected 27, which is provided on the end side of the cooling air channel 10 and which is connected with a rebound plate 28 (see Figure 4A).

In the expansion space 27, the upper partial current 24 is diverted with the aid of the bounce plate 28, so that it exits as an external veil of cooling air 13 through the supply air outlet 8 or through the guide element 22 provided in this place out. In the expansion space 27 the upper partial current 24 experiences after stabilization in the area of the edge 21a of the roof type a stabilization and at the same time a deviation. Since the rebound plate 28 generally deals with the fact that the upper partial current 24 of the cooling air stream 24, 25 is deflected, as shown in Figure 4A, mostly at an acute angle from its horizontal direction adopted in the area of the head of the body 3b. In fact, an obtuse deviation angle  in the range of 90º to 120º is observed in this context. The bounce blade 28 takes into account this angle of deflection  because it forms with the cooling air channel 10 or with its upper area 10b in the same way an obtuse angle  of approximately 100 °.

A comparable deviation angle  of approximately 100 ° to 120 ° is also observed for the lower partial current 25. In this place, however, the bounce plate 28 does not provide a corresponding deviation, since it is only responsible for the upper partial current 24 Rather, the lower partial current 25 deviates from the deflection zone 21 or the deflection fin 21b from the predominantly horizontal development in the upper zone 10b of the obtuse angle cooling air channel 10. For this purpose, the deflection fin 21b is, in part, a component of the edge 21a of the roof type or partially defines it. In addition, the deflection fin 21b has the longitudinal grooves 26 already treated and which are still described below.

Actually, the longitudinal grooves 26 in the deflection fin 21b of the deflection zone 21 are occupied in the

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end side of the guide plate 20 that at least a part of the lower partial current 25 does not deviate directly but rather arrives and can also reach the expansion space 27. In this way, a possible backwater of the area is avoided. lower part 25 in the area of the deflection element 21 and, in this way, possible turbulence in this area is also largely prevented. To this also contributes the fact that the edge 21a of the roof type increases the cross section of the circulation of the lower partial stream 25 in the area of the supply air outlet 8.

In any case, in this area, that is, on the outlet side of the cooling air stream 24, 25 there are no possible backwaters of air and the turbulence involved with it and, in particular, nor in the lower partial current 25 nor in the upper partial current 24. At the same time, both partial currents 24, 25 deviate, respectively, in an obtuse angle and, in particular, taking into account an angle  of approximately 90 ° to 120 ° in comparison with the horizontal. To this must be added that the lower partial current 25 and the upper partial current 24 experience at least partially an intimate mixture. This involves the perforations or the longitudinal grooves 26, which allow an at least partial exchange between the two currents 24.2 5 in the expansion space 27 and / or in the area of the edge 21a of the roof type. In this manner, the lower partial current 25 and the upper partial current 24 leave the guide element 22 as predominantly laminar circulations under the simultaneous configuration of the outer veil of cooling air 13 and the inner veil of cooling air 12.

The guide element 22 is inclined, in turn, in the direction of the opening of the body 4 in front of the separation plate 20. In fact, in this place there is an inclination, which corresponds to an inclination angle  of approximately 20 ° , as clearly shown in Figure 4A. This inclination of the guide element 22 in the direction of the opening of the body 3 takes into account the fact already described that the supply air outlet 8 and the guide element 22 that closes it have the distance B from a head edge of the body 3b. This distance B is explained by the total construction width of the shutter housing 6, on the one hand, and by the lighting means 7, on the other hand.

As a consequence, both cooling air veils 12, 13 extend from the guide element 22 in an insignificant measure inclined within the opening of the body 3, so that the two cooling air veils 12, 13 impact at the lower end or at the base side of the opening of the body 4 on the return air inlet 14 provided therein. Since the return air inlet 14 is arranged in the front edge of the base of the body 3a, the insignificantly inclined development of the two cooling air veils 12, 13 along the length of the air is compensated in this way. body opening 4.

The return air inlet 14 is shown in detail in Figures 4B and 6. It is recognized that in this place another air conduit grid or air guide plate is provided (in addition to the separation plate 20 including the deflection zone 21), which can be manufactured again from a sheet plate easily and inexpensively. Actually, the return air inlet 14 is configured in two parts and has a guide projection 29, which can be recognized especially in Figure 4B, and a perforation surface 30. The guide projection 29 is located in the side of the space of the products, that is, it is directed towards the space of the products 16. Instead, the perforation surface 30 is connected in the direction of the opening of the body 4 or on the side of the opening of the body in the outgoing guide 29 in question.

It is recognized that the guide projection 29 is equipped with a ramp 29a tilted back towards the rear wall of the body 3c. Actually, there is an inclination angle  of approximately 50º to 70º for ramp 29a. In this way, the ramp 29a ensures that the cooling air veil 12 13 is guided with its help and in some way leads to the perforations 31 of the drilling surface or of the drilling flank 30. With the help of the Figure 6 shows that the perforations 31 in question are designed as longitudinal grooves 31. In addition, the longitudinal grooves 31 are equally spaced and extend transversely to the cross-section of the circulation Q of the cooling air stream 24, 25 or of the two veils of cooling air 12, 13, as clearly shown in Figures 2 and 4B,

In addition, a cover strip 34, which closes a leading edge of the base of the body 3a, with a ribbon ledge 32, also provides a guide for the cooling air veil 12, 13. In this way, they can keep the possible losses especially reduced and the cooling air veil 12, 13 experiences optimal alignment and guidance.

With the aid of Figure 8, it is finally shown in combination with Figure 2 that either the fans 11 within the cooling air channel 10 or in the vertical zone 10c of the cooling air channel 10 have an inclination. Actually, in this place an inclination angle observa is observed in the range of approximately 10 ° in front of the vertical (see Figure 2). Such angle of inclination  is provided by a profiled sheet 33 that carries the fans 11 and which is inserted in the cooling air channel 10 or in its vertical zone 10c, which is shown in detail in Figure 8. As a consequence of the inclination of the individual fans 11 there is a first described division of the cooling air stream 24,

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25 in the cooling air stream 24, 25, which leaves the supply air outlet 8, on the one hand, and, on the other hand, in the cooling air stream 24, 25, which enters through the perforations 18 in the space of products 16.

Claims (15)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty E12150393 09-23-2014 1.-Refrigerating furniture, in particular a refrigeration shelf for the refrigeration and presentation of the products (2), with a body (3) and with at least one support of the products (1) arranged in it, also with at least a veil of cooling air (12, 13) leaving a cooling air channel (10) in the body (3) at its supply air outlet (8) as well as circulating along a hole in the body (4) to a return air inlet (14), and with a rear wall of the product compartment (17) at least partially perforated as well as crossed by the cooling air stream (24, 25) generated by at least a fan (11) in the direction of the body hole (4), characterized in that the cooling air channel (10) has at least one separating plate (20, on the side of the head in the body (3), 20 ') which divides the cooling air stream (24, 25) with bypass zone (21) per Forada on the exit side. 2. Refrigerator furniture according to claim 1, characterized in that the deflection zone (21) is equipped with longitudinal grooves (26) that extend along a cross-section of the circulation (Q). 3. Refrigeration cabinet according to claim 1 or 2, characterized in that the deflection zone (21) is essentially formed of two pieces with edge (21a) of the roof type and deflection fin (21b) connected therewith longitudinal grooves (26). 4. Refrigeration furniture according to claim 3, characterized in that the edge (21a) of the roof type penetrates as a resistance to circulation in a higher partial current (24) of the cooling air stream (24, 25) . 5. Refrigeration cabinet according to claim 3 or 4, characterized in that the deflection fin (21b) deflects a lower partial current (25) of the cooling air stream (24, 25) at an angle, in particular in obtuse angle. 6. Refrigeration cabinet according to claim 4 or 5, characterized in that for the deviation of the upper partial current (24) an impact plate (28) is provided that closes on the narrow side the cooling air channel ( 10). 7. Refrigeration unit according to one of claims 1 to 6, characterized in that the deflection zone (21) appears on the extreme side of the circulation on a guide element (22) that closes the supply air outlet (8) of the cooling air channel (10). 8. Refrigeration furniture according to claim 7, characterized in that a edge (23) of the exit side of the deflection zone (21) divides the guide element (22) approximately in half in the cross section. 9. Refrigeration cabinet according to one of claims 3 to 8, characterized in that the deflection fin (21b) is equipped with the longitudinal grooves (26), so that both partial currents (24, 25) experience above of the guide element (22) an at least partial intimate mixture. 10. Refrigeration unit according to one of claims 7 to 9, characterized in that the guide element (22) is inclined in the direction of the body hole (4) in front of the separation plate (20). 11. Refrigeration cabinet according to one of claims 1 to 10, characterized in that the return air inlet (14) is equipped with two pieces with guide projection (29) on the side of the space of the products and flank of perforation (30) that connects there on the side of the body hole. 12. Refrigeration unit according to claim 11, characterized in that the perforation flank (30) is equipped with longitudinal grooves (31) that extend along the cross-section of the circulation (Q). 13. Refrigeration unit according to claim 12, characterized in that the longitudinal grooves (26) extend, on the one hand, from the deflection fin (21b) and the longitudinal grooves (31) extend, on the other hand, from the perforation flank (30) essentially parallel to each other and extend in each case vertical to the cross section of the circulation (Q). 14. Refrigerator furniture according to one of claims 1 to 13, characterized in that the fan (11) is arranged inclined within the cooling air channel (10) compared to its essentially vertical alignment in the area of the wall perforated rear of the product space (17). 15. Refrigeration unit according to claim 14, characterized in that the fan (11) in accordance with its inclination conveys a part of the cooling air stream (24, 25) through the perforated rear wall (17) and a part of the cooling air stream (24, 25) towards the supply air outlet (8) eleven