DE2158147A1 - Wall fridge - Google Patents

Description

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Applicant: 67 Ludwigshafen / Eh., November 23, 1971

——TTT P ^ 88J I / zip

Detroit Sem

Societä Elettromeocanica

Monfalcone SpA _{A <} .r- * s

Monfalcone (Gorizia), Italy 2 158147

Via G. Galileo 7

Representative:

Patent attorneys

Dipl.-Ing. Adolf H. Fischer Dipl.-Ing. Wolf-Dieter Fischer 67 Ludwigshafen am Bhein Eichard-Vagner-Strasse 22

Wall cooling tank

The invention relates to a method for operating a wall refrigerator and to the special construction of such a wall refrigerator · A similar such wall refrigerator is used for preserving and displaying merchandise, primarily of food, and such wall refrigerators are mainly situated in self-service stores, so that customers, who serve themselves, can take everything they need and then pay for it at a cash register

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The refrigerators used in such self-service shops are mostly open wall-mounted refrigerators, because in this way one can make the goods widely available and the customers making self-service easier.

In the case of such wall cabinets already set up in various shops, however, there is the great disadvantage given that cold air escapes in "large quantities" through the large openings in the vertical wall cupboards, which naturally falls down and therefore requires a very high cooling capacity. The downward falling cold airflow disturbs the buyers, who are exposed to an unpleasant cold effect, apart from the fact that in various files of the refrigerator condensation due to the moisture of the Content is evoked.

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The invention has' set itself the task of a Wall refrigerator, which has an open basin in the lower part, to ensure that the cooling air flows in one flow calm flow both in the lower part and in the upper part, whereby at the same time it should be ensured that that the glass doors with which the front of the upper part is closed, do not fog up so that the the goods provided behind it remain clearly visible.

According to the invention, this problem has now been solved therein found that in the refrigerator consisting of the lower part and the upper part, each of these parts is surrounded by an independent cold air stream and furthermore on

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the front of the upper part, which is closed with doors, is guided by an auxiliary air stream of the ambient air to avoid condensation of moisture there. It is advantageous that The cooling air inside the upper part is opposite to the airflow of the ambient air on the outer surface flows.

According to a further process step according to the invention the procedure is such that the auxiliary air flow ^ of the ambient air is heated to its relative Maintain humidity relative to the humidity of the ambient air. If necessary, can one also proceed in such a way that the ambient air is guided into the bottom of the upper part, so that no condensation occurs on the bottom despite the temperature of the lower part.

A design of such a wall refrigerator according to the proposal of the invention is that the wall refrigerator cabinet from a lower part and a closed with glass doors on the front upper part _Λ

consists, with the lower part an upwardly open ™

Has basin and easily detachable cheeks close the side of the refrigerator. The refrigerator can do this be constructed so that channels at the front and back of the pelvis and below the pelvis a cavity connected to these channels are provided, in the latter a fan and a Evaporators are built into the refrigerator.

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Another design according to the invention also provides before that an inner cell with consoles or compartments is provided in the upper part, below the in one A cavity is assigned to an evaporator of the refrigerating machine is, being attached to the cavity, which is connected to the inner cell via a slot, to the The rear side is followed by a channel that continues above the cell in a horizontal channel called the is connected to the interior of the cell via an opening, while a fan is inside the duct system is built in and a duct with a fan is guided in the rear wall of the upper part, which is fed into an im Bottom of the upper part lying channel passes over, the below the glass doors of the upper part in mouthpieces ends, it being possible for electrical heating resistors to be built into the mouthpieces.

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Further features of the invention emerge from the following description of an exemplary embodiment in FIG Connection with the drawing and the claims.

It show, in schematic sketches,

Figure 1 is a diagrammatic representation

a wall refrigerator according to the invention and

Figure 2 shows a cross section through the wall refrigerator according to Figure 1. '

The wall refrigerator according to the invention consists of a lower part 1, which has a basin that is open at the top, which is used for the preservation and freezing of certain foods and also consists of an upper part 2, which is closed to the front with the help of glass doors 3 which are hinged to the side of uprights 4. The lower part 1 and the upper part 2 of the refrigerator are connected to one another by lateral cheeks 5 to form a unit and since these side panels are easily detachable, several such wall-mounted refrigerators can be converted into a type of cooling channel connect with each other and then terminate at the ends with such side walls 5. In this way you can use wall-mounted refrigerators obtained of any length.

As can be seen from Figure 2, the lower part of the refrigerator has an inner cell in the form of a basin 7, so that in it the goods, i.e. food to be kept in the frozen state

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medium, can be included. This basin 7 is forced to freeze by a circulating cold air, which, as FIG. 2 shows, encloses the entire basin 7. This cold air will brought into circulation with the help of a fan 8 and is first carried out by the evaporator of a not shown Cooling machine, where it cools down to the desired temperature and then what it is then flows through a channel 10 provided on the back, to then horizontally above of the basin 7 to continue to flow, with the goods located in the basin due to their high density holds at the desired temperature without a particularly large cooling capacity is required. That As the arrows shown there show, basin 7 is completely enveloped by the cooling air because it occurs at the front then into the channel 11, where it is sucked in by the fan 8 "and again the evaporator 9 is supplied and so the cycle continues.

The upper part 2 represents a showcase with an inner cell 12, which is equipped with consoles or compartments 13, which are used to hold the goods to be cooled. This inner cell 12 is cooled with the aid of a circulation of air which surrounds the entire inner cell 12, including the part of the projecting wall 12 ¹ which delimits this cell towards the top.

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This protruding inner wall 12 'gives inside the housing the possibility of forming a channel 14 and in particular an expansion of this Channel in which a fan 15 is received. Through the one running at the back of the showcase Channel 14 is the air with the help of the fan 15 sucked upwards and pressed into the horizontal channel 14 ·· above the inner cell 12. At the end of the Channel 14 'is an opening 18, dLe a connection

into the interior of the cell 12, provided and %

the cold air now flows into the interior of the cell 12, which it leaves at the bottom through a slot 17 to get into a space below the inner cell 12, where an evaporator 17 of the cooling machine is arranged, through which the air flow is sucked and cooled accordingly will. In this state it gets back into the channel 14 and so on. The air, which is constantly cooled to the desired temperature in this cycle, ensures that the cooling required there is available in the showcase of the upper part so that the goods lying on the consoles or the goods in the compartments at the prescribed depth / g temperature is kept constant.

This cold air running inside cell 12 strokes the inner surface 20 of the glass doors that be cooled accordingly, what in view of the temperature difference against the outside in many Cases of condensation on the outer surface 21 of the door caused by the moisture that is in the vicinity

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ambient air is always available.

In order to avoid this inadequacy, a second air circuit is proposed according to the invention the ambient air, which is intended to serve to open the outer surface 21 of the glass doors 3 to be painted to avoid condensation of the existing moisture. As if from the directions of the arrows As can be seen in the drawing, this second air stream flows in the opposite direction to the 'direction of the im Inner flowing air stream.

As can be seen from the drawing, with the help of a. Fan 23 attached to the top of the showcase is, ambient air is sucked in and through a duct 24 at the rear of the refrigerator in this Channel pressed down, from where it enters a channel 25 which runs in the bottom of the inner cell 12. This air can with the help of electrical heating resistors 27 are heated and then passes through mouthpieces 26, which are located below the front surface 21 the glass doors 3 are located. This air flows along the front of the glass doors, thus preventing these windows from misting up.

The air temperature can be controlled and regulated with the help of a thermostat, not shown, which is attached e.g. near the openings of the mouthpieces, where the electrical heating resistors heated air flows out.

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The outside air flowing through the duct 25 is used to keep the bottom surface 30 of the upper part 2 at such a temperature that is sufficient to the Formation of condensation "by the cold above it Air is caused to be restricted.

In the time in which a customer leaves the "showcase in the Upper part removes a product, so where one or more doors of the upper part 2 are open for a shorter or longer period,

the auxiliary circuit of the air will serve to "

to avoid violent leakage of the cold air from the cell 12 and thus also the formation of ice crusts, as they occur in a freezer on the inner surface 20 of the glass door, which the visibility after Prevent the doors from closing.

As usual, you can both the lower part and the upper part of the wall refrigerator with the help of fluorescent tubes 31 or 32 'illuminate.

What has been described here for a section of a wall refrigerator according to the invention corresponding to the cross section according to FIG. 2 naturally applies to designs of such a refrigerator in different lengths and with a different number of doors in the upper part. Then only the number of fans and their dimensions as well as the sizes and number of evaporators and the electrical heating resistors have to be adapted accordingly.

With the help of the easily assembled side walls 5 can a larger number of such wall-mounted refrigerators

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derreihen and then at the ends with the side panels complete so that you can set up such refrigerators of any length.

The compressors used for the cooling process can either be installed directly in the wall refrigerator, which is not shown for the sake of simplicity, or they can be built up separately on the side and with the connection to the refrigerator must be established using the appropriate piping.

With the help of a group of such compressors, both the upper part and the lower part can be supplied, but one can, if it seems more expedient for the safety of the function, also to each of these parts Allocate own compressor group.

The wall refrigerator according to the invention is much more reliable than the previously known and can also be made cheaper to operate. Through the one in the top the doors provided you get a much better freezing effect, whereby much less energy is needed, because the complete air exchange, which occurs with the open wall cupboards, and on top of that also the condensation of the atmospheric Moisture on the surface of the evaporator falls away what always causes a great loss of energy, which has to be used for freezing the water and the condensation of the steam "

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Of course, can also be different as in that The example shown here, the fans and their position can be changed, as well as, of course, the Air inlet and outlet and the purpose of air circulation even if the rules according to the invention are adhered to.

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Claims (1)

2158U7 - 12 - Claims 1. A method of operating a wall refrigerator, which is used to preserve and display a product, characterized in that in the ⁷ of the lower part (1) and upper part (2) existing refrigerator, each of these parts is surrounded by an independent cold air stream and further to the with Doors (3) closed Vordex ^ side of the upper part (2) an auxiliary air flow of the ambient air is directed to avoid condensation of moisture there. 2. The method according to claim 1, characterized in that the cooling air inside the upper part (2) is opposite the airflow of the ambient air flows on the outer surface. 5. The method according to claim 1 and 2, characterized in that the auxiliary air flow of the Urc-ebungsluft is heated to maintain its relative humidity compared to the humidity of the ambient air. 4 ·. "Method according to claim 1 to 3» characterized in that that the ambient air is guided in the bottom of the upper part, so that despite the temperature of the lower part no condensation occurs on the floor. 5 · Device for performing the method according to claim 1 to 4 ·, characterized in that the refrigerator consists of a lower part (1) and one with - 13 2 0 983 5/0637 215814 - 13 - Glass doors (3) at the front closed upper part (2), the lower part (1) being a The basin (7) is open at the top and easily detachable cheeks (5) close off the side of the refrigerator. Device according to claim 5 »characterized in that caß at the front and back of the pelvis (7) ■ Channels (11 and 10) and below the pelvis (7) f a cavity connected to these channels is provided, in the latter a ventilator (8) and an evaporator (9) of the refrigerator are installed. Arrangement according to claims 5 and 6, characterized in that an inner cell (12) with brackets or compartments (13) is provided in the upper part (2), below which an evaporator (17) of the cooling machine is assigned in a cavity Cavity, which is connected to the inner cell (12) via a slot (16), a channel (14) connects to the rear side, which continues above the cell (12) in a horizontal channel (14 ¹ ), which via an opening (18) is connected to the interior of the cell (12), while a fan (15) is installed inside the channel system (14, 14 '), and a channel (24) with fan (23 ), which merges into a channel (25) located in the bottom of the upper part (2) and ending in mouthpieces (26) below the glass doors (3) of the upper part (2). - 14 - 209835/0637 2158U7 - 14- - 8. Apparatus according to claim 5 to 7 »characterized in that that electrical heating resistors (27) are installed in the mouthpieces (26). 209835/0637