DE202011110116U1 - Refrigerated cabinets with a cold room coolable by means of cold outside air - Google Patents

Abstract

Refrigerated furniture (1.1; 1.2; 1.3; 1.5) with a cooling space (2) for receiving goods to be cooled, at least one fan (6) generating a circulating air flow (8), fan, blower or similar flow machine, and an evaporator (9) for Cooling of the circulating air stream (8) which is passed through the cooling space (2) for cooling the goods, the cooling unit (1.1; 1.2; 1.3; 1.5) being designed for cooling the cooling space (2) by means of cold outside air, characterized in that the refrigeration unit (1.1; 1.2; 1.3; 1.5) has at least one inlet (3.1; 3.2) and at least one outlet (4.1; 4.2), the inlet (3.1; 3.2) for supplying outside air or fluid cooled by outside air the circulating air flow (8) and the outlet (4.1; 4.2) are used to remove air from the circulating air flow (8).

Description

The invention relates to a refrigerator with a cooling space for receiving goods to be cooled, at least one fan generating a circulating air fan, blower or the like turbomachine and an evaporator for cooling the circulating air flow, which is passed for cooling the goods through the refrigerator, wherein the refrigerated cabinets is designed for cooling the cooling space by means of cold outside air.

State of the art

Refrigerated cabinets are, for example, refrigerated shelves, which are used in supermarkets to permanently cool food and keep it easily accessible to the customer. In order to cool the food to the desired temperature, refrigerated cabinets usually have a refrigerator, for example in the manner of a compression refrigeration machine. Such a refrigerated cabinet is from the EP 1 334 676 A1 known.

Since the refrigeration units require electrical power for their operation, as low as possible energy consumption is sought in the course of new or further developments.

One approach to reducing the electrical power consumption of a refrigerated cabinet is from the DE 101 11 430 A1 known. There is used to cool the cold room of the refrigerator furniture ambient air, which is guided by means of a line from the outside into the refrigerator. Depending on the temperature of the ambient air, the cooling of the cooling space of the refrigerator furniture is more or less already achieved by the ambient air itself. This results in reduced energy costs in the operation of the refrigerator.

In this known refrigeration units is a cooling rack, which generates a circulating air flow by means of a blower, which flows through the cooling chamber of the refrigerator cabinet. The refrigerator is designed to be open to the outside, wherein a cooling air curtain is formed by the cooling air flow, which prevents the penetration of warm ambient air into the refrigerator.

Other refrigeration units, which use ambient air or outside air for cooling, are from the DE 43 34 443 A1 . DE 82 02 849 U1 and the DE 43 00 750 A1 known.

task

It is an object of the invention to provide a refrigerator with the features mentioned, which is further optimized in terms of its power consumption. Also, measures are proposed, which allow retrofitting existing refrigeration furniture simple and inexpensive to achieve a corresponding further reduction in the power consumption of this refrigerator.

Invention and advantageous effects

To solve the problem, a refrigerator is proposed, which has the features mentioned in claim 1. Further, a device for controlling and / or controlling the cooling of a refrigerated cabinet with the features of claim 16 is proposed to solve the problem. Also, a kit for retrofitting a refrigerated cabinet with the features of claim 21 is proposed to solve the problem.

Advantageous embodiments of the invention will become apparent from the dependent claims, the following description and the figures.

An inventive cooling furniture has a cooling space for receiving goods to be cooled, at least one fan generating a circulating air, fan, blower or the like turbomachine and an evaporator for cooling the circulating air flow, which is in particular part of the refrigerator of the refrigerator. The circulating air flow is passed through the refrigerator for cooling the goods.

The refrigerator according to the invention may be a refrigerated shelf in open design and / or a refrigerated shelf in a closed design. It is also conceivable that the cooling furniture is a cooling rack, which is preferably closed by means of flat elements, such as sliding glass panes. Also, the refrigerator can be a counter, chest or island, but also a refrigerator, as used for example in domestic use. In principle, the cooling furniture according to the invention is also suitable for freezing the goods to be cooled.

It may be the refrigerator of the cabinet to the rear through a rear wall, bounded above by an upper wall and down through a lower wall, wherein the circulating air flow flows through at least one opening or a passage on the upper wall in the cooling space and by at least an opening on the lower wall flows out of the cooling space.

In order to reduce the energy costs in the operation of the refrigerator, the refrigerator according to the invention for cooling the refrigerator is formed by means of cold outside air.

According to the invention, the cooling furniture has at least one inlet and at least one outlet, the inlet serving for supplying outside air or outside air cooled fluid into the circulating air flow and the outlet for removing air from the circulating air flow.

By this measure, not only a supply of cold outside air is possible, but at the same time it is possible that the heated air in the cooling chamber is removed. As a result, goods can be cooled in a particularly energy-saving manner by means of the refrigerating appliance according to the invention. Also, this is in the refrigerator, a balance between supplied and discharged airflow in a simple manner feasible. A complex and energy-consuming cooling of air by means of a corresponding technical process is thereby only partially or not at all necessary.

For the purposes of the invention, "outside air" is to be understood as meaning the air sucked in from the surroundings, wherein the environment preferably means a space other than the space of the refrigerated appliance. The outside air can be the air from the outdoors, such as occurs on the outside of a building. The outside air may also be the air of another room of a building than the showroom for the refrigerated cabinet. For example, the air of cold storerooms or freezer rooms can be used as outside air. Essential for the removal of the outside air is that this location largely or substantially has the outdoor temperatures or colder temperatures.

It has been shown that the average outside temperatures in Germany over approximately 3 to 5 months per year are at temperatures which sufficiently enable the cooling of goods by means of the outside air. It is thus preferable to cool products which require a temperature range to be cooled between 1 degree Celsius and about 10 degrees Celsius, such as dairy products. The cooling of meat and sausage products is also possible by means of cold outside air.

According to one embodiment of the invention, it is provided that the inlet and / or the outlet is arranged on the suction side of the circulating air generating fan, fan, blower or the like turbomachine. As a result, at the same time the outside air can be sucked in by means of the recirculation-generating turbomachine, so that depending on the design of the turbomachine an additional fan or an additional fan for supplying the outside air into the refrigerator is not necessary. If the refrigerator already has such a forced-air system from home, its fan or fan can be used for sucking in the outside air, so that the cooling of the refrigerator according to the invention by means of cold outside air can be realized particularly cost-effectively.

Preferably, the air-generating flow machine seen in the direction of the circulating air flow, arranged in front of the cooling space, in particular arranged directly in front of the cooling space. As a result, the air to be cooled is forced into the cooling space, so that a cold outside air flow supplied on the suction side of the turbomachine does not largely influence the flow entering the cooling space and thus largely avoids fluctuations in the cooling air flow reaching the cooling space.

According to a further embodiment of the invention, it is provided that the inlet is arranged outside the cooling space. This avoids that the outside air flowing into the refrigeration unit directly hits the goods to be cooled. By having the inlet remote from the cold room, the outside air stream may be subjected to a treatment. Air purification measures may be performed, such as filtering gaseous and / or particulate contaminants from the outside air stream. Also, the introduced into the refrigerator outside air can be selectively changed in its flow profile. It is advisable for the inlet to be arranged at a supply air duct leading to the cooling space. Such a supply air duct can for example be between the rear wall and the rear outer wall of the cabinet or be formed by the rear wall and the rear outer wall of the cabinet.

Preferably, the supply air duct is not only between the rear wall and the rear outer wall of the cabinet, but also between the upper wall and the upper outer wall of the cabinet and the lower wall and the lower outer wall of the Kühlnöbels, which together form a flow space along which the circulating air flow is guided from bottom to top and then flows from the top through the opening in the refrigerator and leaves through the opening in the lower wall, the refrigerator again.

According to a further embodiment of the invention, it is provided that, viewed in the direction of the circulating air flow, the inlet and / or the outlet before the evaporator act on the circulating air flow. For this purpose, the inlet and / or the outlet are preferably arranged in front of the evaporator. As a result, the evaporator is acted upon by means of the circulating air cooled with outside air, so that the cooling power to be applied by the evaporator to reach the predetermined temperature in the refrigerator is reduced particularly effective and possibly no cooling power from the evaporator is more to provide, since the predetermined cooling temperature for the refrigerator is already reached. By the cold outside air acts directly in front of the evaporator, the electrical power consumption of the cabinet is thus effectively reduced.

If the evaporator is structurally designed to rectify the flow passed through it, this rectification function is also used for the outside airflow introduced into the refrigeration cabinet. Regardless of the type of flow of the entering into the refrigerator outdoor air flow thereby coming out of the evaporator flow is changed or rectified in such a way that despite the supply of outside air into the refrigerator a predetermined and desired flow of the refrigerator is achieved by means of air to be cooled , A possibly introduced into the refrigeration furniture turbulent outside air flow can be rectified in this way so far that an optimal flow of the cooling space and thus an optimal cooling of the goods to be cooled takes place.

Alternatively, it may of course also be provided that, viewed in the direction of the circulating air flow, the inlet and / or the outlet after the evaporator acts on the circulating air flow. As a result, the inlet is spatially particularly close to the entrance of the cooling space of the refrigerator mounted so that the cold outside air or acted upon by cold outside air carrier fluid flows directly from the inlet into the refrigerator and acts to cool the goods or a cooling air curtain in the cooling area of the Refrigerator makes. This also makes the outlet directly attachable to the outlet or end of the cooling space, so that after flowing through the cold outside air through the cooling chamber, the heated air is discharged immediately after leaving the cooling chamber through the outlet of the cooling furniture.

According to a further embodiment of the invention, it is provided that, viewed in the direction of the circulating air flow, the inlet and / or outlet after the cooling space act on the circulating air flow. Preferably, viewed in the direction of the circulating air flow, the inlet and / or the outlet downstream of the cooling space. By inlet or outlet after the cooling chamber act on the recirculation air, an energetically particularly favorable situation is created because the addition of cold outside air takes place where the circulating air flow is already heated by passing the cooling space. Also, a discharge at this point is particularly favorable. Inlet and outlet thus act at a point on the circulating air flow, at which the circulating air is already brought to a heated level and anyway measures to cool the circulating air flow are to be provided before the circulating air flow reaches the refrigerator again.

It is particularly advantageous in terms of energy, according to an embodiment of the invention, that in the direction of the circulating air flow, the inlet between the evaporator and the outlet acts on the circulating air flow. As a result, cold outside air or by means of cold outside air impinged carrier medium passes directly into the region of the evaporator by means of the inlet, so that the circulating air flow is already cooled to a high degree and cold energy from the evaporator of the refrigeration plant is not or only very little needed. At the same time it is avoided that the cold outside air through the outlet immediately leaves the refrigerator again. As a result of the arrangement of the outlet in the direction of the circulating air flow, upstream of the inlet, such a short circuit is effectively avoided by direct discharge of the cold outside air which has just been supplied. It is thereby removed by means of the outlet specifically only heated air of the circulating air flow and discharged from the refrigerated cabinets. It is thus the supply of cold outside air into the circulating air flow and the removal of heated air from the circulating air flow out in energetically particularly effective and effective manner.

A further embodiment of the invention provides that the outlet is arranged in the region of the bottom or the rear wall of the refrigerated cabinet. As a result, a discharge of the used, already heated air is realized in a particularly simple manner, since the air circulation in the refrigerator according to the invention is from top to bottom and thus in the lower part of the cabinet the air has already passed or flowed through the refrigerator and thus already in one heated state is present. It is therefore also ensured by this measure, a particularly effective cooling means of cold outside air.

A further embodiment of the invention provides that the inlet and / or outlet can be coupled in each case with an associated supply line in such a way that the supply line goes upwards away from the cooling furniture. As a result, an installation of the supply line or the supply lines is particularly easy to implement, since the assembly work for the outside air supply of the cabinet can be done from above and thus a costly moving away of the cabinet from his site, for example against a building wall, is not necessary.

According to a further embodiment of the invention, it is provided that the inlet is coupled to a Zuluftgebläse and / or the outlet with an exhaust fan. By such a blower the cooling capacity can be significantly increased by means of the cold outside air. The supply air or exhaust fan can act to support a circulating air blower provided in the refrigeration unit, so that the circulating air blower is relieved. Also can be significantly increased by the Zuluft- or exhaust fan flowing into the refrigerator cold outside air. The supply air fan can be a pressure fan and the exhaust fan a suction fan. Supply air fan and exhaust fan can be speed controlled or speed controlled. There are stepless speed-controlled or speed-controlled and stepwise speed-controlled or stepwise speed-controlled blower conceivable.

It is advisable that the inlet for the cold outside air and / or the outlet for the air to be discharged are closable. This avoids that at high outside temperatures, such as those present in the summer, warm outside air enters the refrigerator and leads to increased energy consumption of the refrigerator. Because a summer activated chiller of the cabinet then has to additionally cool this warm outside air flow to reach the predetermined cooling temperature in the refrigerator.

For closing the inlet or outlet, at least one flap, slide or the like covering or closing mechanism is conceivable. The covering or closing mechanism can be automatic and / or operated by means of control or regulation.

An inventive cooling furniture may alternatively or in addition to the cooling cabinet of the type described above be adapted to effect by indirect measures, a cooling of the cold room by means of cold outside air.

For this purpose, it may be provided according to an independent idea of the invention that the refrigerator has at least one arranged outside the refrigerator heat exchanger, which is flowed through for cooling the circulating air flow of the cabinet of cold outside air or by a heat of cold outside air carrying carrier medium and is flowed through , Through the heat exchanger direct contact of the cold outside air with the circulating air flow of the cabinet is avoided. The recirculating air flow circulating in the refrigeration unit is thus protected from external influences such as dirt particles entrained in the outside air. Also, a complex pressure regulation of the circulating air flow is not necessary, since neither an air flow added nor an air flow is removed from the circulating air flow. Rather, the heat exchanger allows separation of the circulating air flow from the air flow of the cold outside air, a cooling of the circulating air flow, so that even by this measure, the electrical power consumption of the cabinet is significantly reduced. The chiller of the refrigerator or its evaporator is spared, resulting in a lower energy consumption.

It is advisable that seen in the direction of the circulating air flow, the heat exchanger is arranged in front of the evaporator of the refrigerator. As a result, circulating air circulated in the refrigeration unit first flows around the heat exchanger, is cooled indirectly by the cold outside air, and then flows through the evaporator, through which the already cooled circulating air can be further cooled if required or required, provided the circulating air does not yet have the predetermined cooling temperature ,

The heat exchanger can, viewed in the direction of the circulating air flow, be arranged after the evaporator or inside the evaporator.

Irrespective of whether the cold outside air is used directly or indirectly for cooling the cold room, the cold outside air can at least temporarily relieve a chiller possibly contained in the refrigerator from home. It can advantageously be provided that, depending on the temperature of the outside air, the cooling space can be cooled or cooled by means of the outside air and / or the heat released by the evaporator of the cooling appliance. As a result, the refrigeration units can be operated all year, with winter or exclusively using the cooling by means of the cold outside air and warm outdoor temperatures, such as those available during the summer, the cooling by means of the refrigerator of the refrigerator and then the supply of outside air is disabled. Also, a combined operation is possible in which the cooling of the cooling space by means of the refrigerator and by means of the cold outside air takes place.

A development of the invention consists in that a heat exchanger arranged outside the refrigerating appliance is provided, which can be flowed through by cold outside air and is connected to the heat exchanger arranged inside the refrigerating appliance for transferring the heat from the cold outside air through a closed circuit, in particular heat or heat is connected refrigeration technology. As a result, between the two heat exchangers can be introduced via a separate circuit from outside the cabinet cold in the refrigerator and heat in a corresponding manner ausbringbar from the refrigerator.

The closed circuit can be operated, for example, by means of a carrier medium, which is outside of the refrigerated cabinet arranged heat exchanger is cooled, for example by means of cold outside air and is then brought via the circuit to the heat exchanger located within the cabinet, where it then gives off the cold air to the circulating air and itself heated in turn. This heated carrier medium is again fed through the closed circuit to the outside of the cabinet heat exchanger and is cooled there again by means of the cold outside air. In this way, with the aid of the cold outside air through the closed circuit and the two heat exchangers and the carrier medium, a cooling of the circulating air flow by means of cold outside air can be achieved over long distances.

Preferably, the circulatory system has at least one circulating pump through which the carrier medium is conveyed in a circle. As a carrier medium, for example, a brine can be used. Also, a refrigerant is conceivable, which changes depending on the temperature of its state of aggregation.

It is advisable that at least one device for storing cold is provided, which is integrated into the circuit refrigeration technology, in particular in the circuit can be switched on refrigeration technology. The device for storing cold may be a container filled with liquid or another fluid. Such storage is useful for storing a large amount of cold when the ambient temperatures are sufficiently low to be used by the refrigerator for cooling. On the stored cold can then be used at times of the day when the outside temperature has increased so much that a use for cooling in the refrigerator is no longer possible. In this case, it is possible to resort to the device for storing cold, in order then to sufficiently cool the cooling space of the refrigerated appliance without switching on the evaporator.

A further embodiment of the invention provides that viewed in the direction of the circulating air flow, the fan, fan, blower or the like turbomachine after the evaporator acts on the circulating air flow, in particular acts on the circulating air flow between the evaporator and the refrigerator.

A refrigerator of the type described above can be operated by the chiller is turned off when a predetermined temperature in the refrigerator compartment of the refrigerator. As a result, the electrical energy consumption of the refrigerator is optimized in a special way. The refrigerated cabinet can be used without any process energy. There is only electricity consumption for operation of the turbomachine to produce the recirculating air flow of the cabinet.

It can also be provided that when a different predetermined temperature is reached in the cooling space, the refrigerating machine is switched on again. This avoids that arise in the cold room too high temperatures, for example, when the cooling by means of the cold outside air for cooling the cooling space of the cabinet is no longer sufficient.

According to a further aspect, the invention relates to a device for controlling and / or controlling the cooling of a cooling cabinet of the type described above. The device comprises an actuator for controlling a heat flow introduced into the cooling cabinet by means of cold outside air, which serves for cooling the cooling space of the cooling cabinet ,

By the inventive device for controlling and / or controlling the cooling of a refrigerated cabinet, the cold outside air can be optimally utilized for cooling the goods stored in the cold room of the refrigerator. The introduced by means of the cold outside air in the cooling cabinet heat flow can be adjusted flexibly and individually as needed. This makes it possible to optimally utilize the cold outside air for cooling in the refrigeration unit, so that a particularly high energy saving can be achieved during cooling.

The actuator may be, for example, a fan, fan or similar turbomachine, by means of which the cold outside air is fed directly into the refrigerator. Also, the actuator may be a fan, fan, fan or the like turbomachine, by means of which the cold outside air is conveyed through a heat exchanger, which forwards the heat of the cold outside air to the refrigerated cabinet via a heat transfer medium. The turbomachine, in particular the blower or the fan, can be speed-controlled or speed-controlled or regulated stepwise. As an actuator and the circulation pump of a circuit is conceivable, in which a heat transfer medium is performed, which absorbs the heat of the cold outside air and transported to the refrigerated cabinets. It is also additionally or alternatively conceivable that the actuator is a valve or a flap, by means of which the inlet for the cold outside air or the outlet for air from the refrigerated cabinet is closable.

Additionally or alternatively, act as an actuator of the evaporator or the refrigerator, which or which is turned on or off as needed.

Under the heat flow, which is generated by the cold outside air, is to be understood as a cold flow, the temperature of which is lower than the temperature in the cold room of the refrigerator, so due to the heat or coldness of this stream, the cooling space is cooled down to a predetermined temperature.

In order to be able to achieve optimal cooling of the cooling space of the refrigerated cabinet to a predetermined temperature by means of the cold outside air, it is appropriate that the actuator can be controlled and / or regulated as a function of the temperature of the refrigerator compartment.

It also makes sense that depending on the temperature of the outside air and optionally a predetermined temperature for the refrigerator, the evaporator of the refrigerator on or off and / or the actuator is switched on or off. As a result, depending on the present outside temperature and the predetermined cooling temperature in the cold room, the cold production by means of the evaporator with respect to the cold production from the cold outside air can be adjusted individually and flexibly so that the cooling furniture has the lowest possible power consumption. The regulation or control can take place in such a way that, as required, the refrigerating machine of the refrigerating appliance is switched on, provided that the predetermined cooling temperature can not be achieved solely by the cold outside air.

The device for controlling and / or controlling the cooling is preferably an electrical device which is microprocessor-controlled.

The refrigerator according to the invention is suitable for warm and moist air, as is often the case for example in the summer months, by means of the cold outside air sucking fan, fan, blower or the like turbomachine from the sales room on the refrigerator according to the invention can be discharged to the outside. For this purpose, the cooling furniture according to the invention may also have a separate fan, fan, blower or the like turbomachine, which sucks the air from the sales room and via air ducts, in particular air ducts of the cabinet, discharges to the outside. For example, the inlet can be blocked in the refrigeration furniture according to the invention, and only the outlet remain open. If the refrigerated cabinet is then operated with the refrigerator compartment open to the outside, air is drawn in from the sales room via the refrigerator compartment and discharged to the outside via the outlet of the refrigerator cabinet. The refrigerator could be additionally switched for this mode in such a way that the chiller of the cabinet is turned off. The refrigerated cabinet would then serve only to remove the air from the sales room.

According to a further aspect, the invention comprises a kit for retrofitting a refrigerated cabinet with a cooling space for receiving goods to be cooled, at least one fan generating a circulating air, fan, blower or the like turbomachine and an evaporator for cooling the circulating air flow, which for cooling the goods by the refrigerator is passed through.

The kit is intended to convert such a refrigerated cabinet to a refrigerated cabinet of the type described above for cooling the cold room by means of cold outside air.

The kit has at least one inlet for supplying outside air or outside air cooled fluid into the recirculating air stream and at least one outlet for discharging air from the recirculating air stream. In addition or as an alternative, the kit has at least one heat exchanger, which can be flowed through or is flowed through by cold outside air for cooling the circulating air flow of the cooling cabinet or by a carrier medium entraining the heat from cold outside air.

Preferably, the inlet and the outlet or the heat exchanger in the refrigerator or on the refrigerated cabinets can be mounted.

The kit provided according to the invention makes it possible to retrofit or retrofit existing refrigerated cabinets in a simple and cost-effective manner.

It makes sense that the kit has at least one fan, fan or the like turbomachine for supplying cold outside air in the refrigerator or a heat exchanger, the carrier medium acts heat transfer to the refrigerator compartment of the cabinet. As a result, a cooling of the refrigerated cabinet by means of cold outside air can be made without the need for a modification of existing already in the refrigerator recirculation or circulating air blower must be made. The supply of the cooling cabinet can be realized solely by the flow machine of the kit.

The kit for the indirect cooling of the cabinet by means of the outside air preferably has, in addition to the heat exchanger in the refrigerator, another, arranged outside the cabinet heat exchanger. The further heat exchanger is preferably coupled to a fan which transports the cold outside air through the heat exchanger and is received by the heat transfer medium contained in the heat exchanger, which then releases its cold to the heat exchanger in the refrigerator.

Furthermore, the kit has supply lines to the additional heat exchanger with the heat exchanger can be arranged in the refrigerator connect and realize in this way a closed circuit in which the heat transfer medium is guided. This circuit preferably has a circulation pump for conveying the heat transfer medium contained in the circuit.

embodiments

Other objects, advantages, features and applications of the present invention will become apparent from the following description of several embodiments with reference to the drawings. All described and / or illustrated features alone or in any meaningful combination form the subject matter of the present invention, also independent of their summary in the claims or their dependency.

Show it:

1 a possible embodiment of a refrigerated cabinet with direct cooling by means of cold outside air in a sectional view,

2 another possible embodiment of a refrigerated cabinet with direct cooling by means of cold outside air in a sectional view and

3 another possible embodiment of a refrigerated cabinet with direct cooling by means of cold outside air in a sectional view,

4 an embodiment of a refrigerated cabinet with indirect cooling by means of cold outside air in a sectional view,

5 Yet another possible embodiment of a refrigerated cabinet with direct cooling by means of cold outside air in a sectional view and

6 another possible embodiment of a refrigerated cabinet with indirect cooling by means of cold outside air in a sectional view.

1 shows - in a schematic representation - a possible embodiment of a refrigerated cabinet 1.1 , The refrigerated furniture 1.1 preferably has the design of a refrigerated shelf and is usually placed in a showroom and is used for presentation and cooling of the in a cold room 2 of the refrigerator 1.1 recorded goods.

Preferably, the cooling furniture 1.1 at least one door, sliding cover or the like closing element 23 on to the fridge 2 to close to the outside and at the same time to allow access from the outside to remove the goods to be cooled. The refrigerated furniture 1.1 can also be designed in such a way that a continuous operation with open refrigerator 2 is possible. The closing element is preferred 23 at the front of the refrigerator 1.1 arranged.

The refrigerated furniture 1.1 has an evaporator 9 a chiller, through which the air can be cooled in the refrigerator. The refrigerated furniture 1.1 also has at least one fan 6 on, through which a circulating air flow in the refrigerator 1.1 is generated. The circulating air flow is in the refrigerator 1.1 directed in the way that he is in the refrigerator 2 arrives there and ensures the cooling of the goods contained therein. After the circulating air flow the refrigerator 2 has happened, the cooling air flow is returned to the evaporator 9 fed and cooled therein.

Preference is given to the refrigerator 2 to the rear through a, preferably perforated, rear wall 14 , upwards through an upper wall 15 and down through a lower wall 16 limited. The back wall 14 , the upper wall 15 and the lower wall 16 form an air duct. The upper wall 15 in this case preferably has at least one passage 17 which is preferably in the front region of the refrigerator 2 flows, so that cold air over the passage 17 along the preferably front region of the cooling space 2 can flow down, preferably a cooling air curtain 48 forms. The cooling air curtain 48 allows that the refrigeration cabinet 1.1 can also be operated with an open front area. The cooling air curtain 48 Prevents the penetration of warm air into the interior of the cold room 2 ,

The over the fridge 2 Guided air passes through at least one opening 18 in the lower wall 16 in the recirculating air duct and is in the evaporator 9 supplied for cooling.

To the power consumption of (not shown) chiller of the refrigerator 1.1 To reduce, is the refrigerated cabinet 1.1 for cooling the cold room 2 formed by cold outside air. The refrigerated furniture 1.1 has an inlet to it 3.1 for supplying cold outside air into the refrigerated cabinet 1.1 and an outlet 4.1 for removing heated air from the refrigerated cabinet 1.1 on. The outside air is preferably taken from a location whose temperature is substantially equal to the outdoor temperature. The extraction location for the outside air may be, for example, a roof or an outer wall area or the like.

The inlet 3.1 is on the suction side 5 of the fan 6 intended. The inlet is preferred 3.1 in the flow direction 8th seen before the evaporator 9 arranged so that over the inlet 3.1 in the refrigerator 1.1 incoming cold outside air first the evaporator 9 flows through before passing over the passage 17 in the fridge 2 arrives. The inlet 3.1 is at one through the back wall 14 and the upper wall 15 formed supply air duct 7 arranged, by means of which the cold outside air into the refrigerator 2 arrives. In the embodiment according to 1 is the supply air duct 7 Part of the circulating air duct.

The outlet 4.1 of the refrigerator 1.1 is in the area of the soil 10 of the refrigerator 1.1 arranged so that the cold outside air after flowing through or passing through the cold room 2 , which from the upper part of the refrigerator 1.1 in the lower area, just above the outlet 4.1 from the refrigerator 1.1 can be dissipated. The inlet 3.1 and the outlet 4.1 are each with a supply line 11 respectively. 12 connectable, so that a supply of cold outside air as well as a discharge of the used air over a spatial distance is made possible.

The supply line 11 respectively. 12 is preferably thermally insulated to reduce heat losses in the supply line and to prevent condensation.

To the refrigerator 1.1 To be able to supply cold outside air over a greater distance is preferably at least one fan, fan or fan in the supply line 11 arranged. Also, in addition, a fan, fan or fan in the supply line 12 be arranged.

To keep the cold outside air as possible without contaminants in the cold room 2 can supply the refrigerator 1.1 have an air filter (not shown) or an air treatment device of any kind.

Preferably, the cooling furniture 1.1 at the inlet 3.1 and at the outlet 4.1 at least one shutter mechanism to inlet 3.1 and outlet 4.1 To be able to close so that at high outside temperatures, the penetration of warm outside air into the cold room 2 is avoided.

The air ducts in the refrigerator 1.1 and the supply lines 11 . 12 can be designed in a round or square cross-section.

In the refrigerator 1.1 It is through the supply of cold outside air into the refrigerator 2 possible, the cooling of the refrigerator 2 by means of the evaporator 9 the chiller and / or the cold outside air make. For example, in a winter operation, the cold outside air can be used and at best without connection of the evaporator 9 the cooling in the cold room 2 done alone by the cold outside air. In a summer operation, however, the supply of outside air is deactivated and the cooling of the cold room 2 can alone by means of the evaporator 9 respectively. Also, a mixed operation is possible in which both the evaporator 9 as well as the cold outside air for cooling the cold room 2 are active.

Switching from summer mode to winter mode or to mixed mode can be done by means of a (not shown) control or regulating device.

2 shows a further embodiment of a refrigerated cabinet 1.2 in a schematic representation. Components of the refrigerator 1.2 according to the 2 , which with the components of the refrigerator 1.1 according to the 1 are identical or functionally identical, are provided with the same reference numerals; in this respect, the description of the refrigerated cabinet 1.1 according to the 1 directed.

The refrigerated furniture 1.2 of the 2 is different from the refrigerator 1.1 of the 1 among other things, that an inlet 3.2 is provided for supplying cold outside air, which is in the direction of the circulating air flow 8th seen, the evaporator 9 is downstream, so that the cold outside air directly into the refrigerator 2 arrives. The outlet 4.2 is in the area of the soil 10 led away to the rear. The supply line 11 for the cold outside air and the supply line 12 for the discharged air, both are essentially behind the refrigerated cabinets 1.2 arranged and go from the refrigerator 1.2 upwards. The inlet 3.2 is on the suction side of the fan 6 arranged, with the fan 6 is preferably located in the supply air duct, which through the upper wall 15 is formed.

The refrigerated furniture 1.2 of the 2 is different from the refrigerator 1.1 of the 1 among other things, that it is designed for open operation and thus the cold room 2 constantly open. Of course, the refrigerator can 1.2 according to the 2 also be provided with a closing element to the refrigerator 2 to close from the outside.

3 shows one too 2 similar embodiment of a refrigerated cabinet 1.3 with among other things the difference that the inlet 3.2 itself, in the direction of the recirculating air flow 8th seen between the fan 6 and the passage 17 located. In this embodiment, the remains in the refrigerator 1.3 installed fans 6 switched off.

4 shows yet another embodiment of a refrigerated cabinet 1.4 , Components of the refrigerator 1.4 according to the 4 , which with the components of the refrigerator 1.1 . 1.2 and 1.3 according to the 1 . 2 and 3 are identical or functionally identical, are provided with the same reference numerals; in this respect, the description of the 1 . 2 and 3 directed.

The refrigerated furniture 1.4 according to the 4 is different from the refrigerated cabinets 1.1 . 1.2 and 1.3 according to the 1 . 2 and 3 among other things, that the cold outside air the refrigerator 1.4 is supplied indirectly. The refrigerated furniture 1.4 has a heat exchanger 13 on, which preferably in a recirculating air channel 19 of the refrigerator 1.4 is arranged and a heat transfer medium leads. The heat transfer medium is cooled by means of the cold outside air and gives the cold or heat through the heat exchanger 13 on the refrigerator 1.4 from. By means of in the refrigerator 1.4 contained fan 6 will pass through the heat exchanger 13 cooled air over the recirculating air duct 19 the refrigerator 2 fed. The heat exchanger 13 is seen in the flow direction of the circulated cooling air, preferably in front of the evaporator 9 the chiller arranged. According to another embodiment, the heat exchanger can also be seen downstream of the evaporator in the direction of flow of the circulated cooling air or in combination with two circuits.

The heat exchanger 13 is on a cycle 20 connected, which in an external area another heat exchanger 21 having. The further heat exchanger 21 is in operative contact with the cold outside air, so that through the other heat exchanger 21 guided heat transfer medium can absorb the cold outside air. For this it is conceivable that the additional heat exchanger 21 is flowed through by at least one fan or blower to optimize the cooling of the heat transfer medium by means of cold outside air.

To circulate the heat transfer medium in the circuit, a circulating pump 22 be provided, which is the circulation of the heat transfer medium in the circulation 20 supported.

As a heat transfer medium, for example, a liquid medium is conceivable, which preferably has a frost protection in order to avoid freezing, especially at the lowest outside temperatures.

5 shows a further embodiment of a refrigerated cabinet 1.5 with direct cooling by means of cold outside air in a schematic representation. Components of the refrigerator 1.5 according to the 5 , which with the components of the refrigerator 1.1 . 1.2 and 1.3 are identical or functionally identical, are provided with the same reference numerals; in this respect, the description of the refrigerators 1.1 . 1.2 and 1.3 directed.

The refrigerated furniture 1.5 is the refrigerator 1.1 according to 1 similar. The refrigerated furniture 1.5 of the 5 is different from the refrigerator 1.1 of the 1 among other things, that the supply line 12 for the discharged air to the rear of the refrigerator 1.5 is dissipated. In that sense, the outlet 4.1 on the back wall of the refrigerator 1.5 arranged. The discharged air is thus in the refrigerator 1.5 over one on the ground 10 arranged air duct to the outlet 4.1 guided. The air duct is also with the recirculation channel 19 coupled, so that part of the air to the evaporator 9 can be supplied and thus as circulating the refrigerator 2 is fed again.

6 shows another possible embodiment of a system for the indirect cooling of the cooling space of a refrigerated cabinet. In the refrigerator according to the 6 it is a

Cooling furniture, which with the refrigerator 1.4 according to the 4 is essentially identical. Components of the system according to the 6 , which with the components of the system according to the 4 are identical or functionally identical, are provided with the same reference numerals, in so far as the description of the system according to the 4 directed.

The system according to the 6 differs from the system according to the 4 inter alia in that at least one, preferably at least two devices 49a . 49b are provided for storing cold. The facilities 49a . 49b are preferably in series in one strand of the cycle 20 tethered. Of course it is also possible to use the facilities 49a and 49b for example in the circulation 20 connect in parallel. The circulation 20 consists of its flow line 50 on which the device for storing cold 49a and 49b Tailored as well as from the return strand 51 ,

The return line 51 of the circulation 20 leads from the heat exchanger 13 which is in the refrigerator 1.4 is arranged in the circuit 20 Promoted heat transfer medium to the heat exchanger 21 , which outside the installation room of the refrigerator 1.4 is arranged, preferably together with the facilities 49a and 49b For example, are arranged on the roof of a supermarket. That through the return line 51 from the heat exchanger 13 to the heat exchanger 21 funded, heated heat transfer medium is by means of the heat exchanger 21 arranged blower 52 cooled and in the cooled state in the storage device 49a forwarded. Unless the device 49a has already been cooled to a predetermined temperature level, the cold heat transfer medium is forwarded to the other device 49b and then gets there in the facility 49b created as cold storage.

The facilities 49a and 49b each have an outlet, which preferably in the bottom of the respective device 49a respectively. 49b is arranged and via which a discharge of cold heat transfer medium in the flow line 50 of the circulation 20 can be coupled. For this purpose, a respective arranged at the output blocking element 53 respectively. 54 open, leaving cold heat transfer medium in the flow line 50 can flow and by means of the circulation pump 22 promoted, in the heat exchanger 13 of the refrigerator 14 gets where its cold to the circulating air stream 8th inside the fridge 1.4 gives off and to cool the refrigerator 2 of the refrigerator 1.4 contributes.

The heat transfer medium may for example be a brine or an antifrogen, which is present as a fluid in liquid form. The devices are preferred 49a and 49b for storing cold each formed as a liquid storage, which receive a relatively large amount of heat transfer medium.

In the operation of the refrigerator 1.4 is the cycle 20 preferably switched in such a way that the heat transfer medium via the return line, the heat exchanger 21 happened and there with the help of the blower 52 is cooled by means of cold outside air and then preferably the device 49a is supplied for storage. The active removal of cold heat transfer medium takes place from the device 49b whose shut-off element 54 is open and thus the flow line 50 fed by means of cold heat transfer medium, which in turn the heat exchanger 13 in the refrigerator 1.4 is supplied.

LIST OF REFERENCE NUMBERS

1.1

refrigeration cabinets

1.2

refrigeration cabinets

1.3

refrigeration cabinets

1.4

refrigeration cabinets

1.5

refrigeration cabinets

2

refrigerator

3.1

inlet

3.2

inlet

4.1

outlet

4.2

outlet

5

suction

6

Fan

7

supply air duct

8th

flow direction

9

Evaporator

10

ground

11

Supply line for outside air

12

Supply line for the discharged air

13

heat exchangers

14

rear wall

15

upper wall

16

lower wall

17

Passage, opening

18

opening

19

return air duct

20

circulation

21

another heat exchanger

22

circulating pump

23

closing element

48

Cooling air curtain

49a

Device for storing cold

49b

Device for storing cold

50

flow line

51

Return line

52

fan

53

shut-off

54

shut-off

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1334676 A1 [0002]
• DE 10111430 A1 [0004]
• DE 4334443 A1 [0006]
• DE 8202849 U1 [0006]
• DE 4300750 A1 [0006]

Claims (23)

Refrigerated furniture ( 1.1 ; 1.2 ; 1.3 ; 1.5 ) with a cold room ( 2 ) for receiving goods to be cooled, at least one recirculating air flow ( 8th ) generating fans ( 6 ), Fan, blower or similar turbomachine, and an evaporator ( 9 ) for cooling the circulating air stream ( 8th ), which is used to cool the goods through the cold room ( 2 ) is passed, wherein the cooling furniture ( 1.1 ; 1.2 ; 1.3 ; 1.5 ) for cooling the cold room ( 2 ) is formed by cold outside air, characterized in that the cooling furniture ( 1.1 ; 1.2 ; 1.3 ; 1.5 ) at least one inlet ( 3.1 ; 3.2 ) and at least one outlet ( 4.1 ; 4.2 ), wherein the inlet ( 3.1 ; 3.2 ) for supplying outside air or outside air cooled fluid in the recirculating air flow ( 8th ) and the outlet ( 4.1 ; 4.2 ) for removing air from the circulating air flow ( 8th ) serve. Refrigerator according to claim 1, characterized in that the inlet ( 3.1 ; 3.2 ) outside the cold room ( 2 ) is arranged, in particular at one to the refrigerator ( 2 ) leading supply air duct ( 7 ) is arranged. Refrigerator according to claim 1 or 2, characterized in that in the direction of the circulating air flow ( 8th ), the inlet ( 3.1 ) and / or the outlet ( 4.1 ; 4.2 ) in front of the evaporator ( 9 ) to the circulating air flow ( 8th ) Act. Refrigerator according to claim 1 or 2, characterized in that in the direction of the circulating air flow ( 8th ), the inlet ( 3.2 ) and / or the outlet after the evaporator ( 9 ) to the circulating air flow ( 8th ) Act. Refrigerator according to one of the preceding claims, characterized in that in the direction of the circulating air flow ( 8th ), the inlet ( 3.1 ) and / or the outlet ( 4.1 ; 4.2 ) to the cold room ( 2 ) to the circulating air flow ( 8th ) Act. Refrigerator according to one of the preceding claims, characterized in that in the direction of the circulating air flow ( 8th ), the inlet ( 3.1 ) between evaporator ( 9 ) and outlet ( 4.1 ) to the circulating air flow ( 8th ) acts. Refrigerator according to one of the preceding claims, characterized in that the inlet ( 3.1 ) and / or the outlet ( 4.1 ; 4.2 ) in the area of the soil ( 10 ) or the back wall ( 14 ) of the refrigerated cabinet ( 1.1 ; 1.2 ; 1.3 ; 1.5 ) are arranged. Refrigerator according to one of the preceding claims, characterized in that inlet ( 3.1 ; 3.2 ) and / or outlet ( 4.1 ; 4.2 ) each with an associated supply line ( 11 . 12 ) are coupled such that the supply line ( 11 . 12 ) to the top of the refrigerator ( 1.1 ; 1.2 ; 1.3 ; 1.5 ) goes away. Refrigerator according to one of the preceding claims, characterized in that the inlet ( 3.1 ; 3.2 ) with a supply air blower and / or the outlet ( 4.1 ; 4.2 ) are coupled to an exhaust fan. Refrigerator according to one of the preceding claims, characterized in that inlet ( 3.1 ; 3.2 ) and / or outlet ( 4.1 ; 4.2 ) are closable. Refrigerator according to one of the preceding claims or according to the preamble of claim 1, characterized in that the refrigerated cabinets ( 1.4 ) at least one outside the cold room ( 2 ) arranged heat exchanger ( 13 ), which for cooling the circulating air stream ( 8th ) of the refrigerated cabinet ( 1.4 ) of cold outside air or by a heat of cold outside air carrying carrier medium is flowed through or is flowed through. Refrigerator according to claim 11, characterized in that in the direction of the circulating air flow ( 8th ), the heat exchanger ( 13 ) in front of the evaporator ( 9 ) of the refrigerated cabinet ( 1.4 ) is arranged. Refrigerated cabinet according to claim 11 or 12, characterized in that an outside of the refrigerated cabinet ( 1.4 ) arranged heat exchanger ( 21 ), which can be flowed through by cold outside air and for passing the heat from the cold outside air through a closed circuit ( 20 ) with the inside of the refrigerator ( 1.4 ) arranged heat exchanger ( 13 ) connected is. Refrigerator according to one of claims 11 to 13, characterized in that at least one device ( 49a . 49b ) is provided for the storage of cold, which in the cycle ( 20 ) is integrated refrigeration technology, in particular is switchable. Refrigerator according to one of the preceding claims, characterized in that in the direction of the circulating air flow ( 8th ), the fan ( 6 ), Fan, blower or similar turbomachine, after the evaporator ( 9 ) to the circulating air flow ( 8th ), in particular between evaporators ( 9 ) and refrigerator ( 2 ) to the circulating air flow ( 8th ) acts. Device for controlling and / or controlling the cooling of a refrigerated cabinet ( 1.1 ; 1.2 ; 1.3 ; 1.4 ; 1.5 ) according to one of claims 1 to 15, with an actuator for controlling a means of cold outside air in the refrigerator ( 1.1 ; 1.2 ; 1.3 ; 1.4 ; 1.5 ) introduced for cooling the cooling space ( 2 ) of the refrigerated cabinet ( 1.1 ; 1.2 ; 1.3 ; 1.4 ; 1.5 ) serves. Apparatus according to claim 16, characterized in that the actuator in dependence on the temperature of the cooling space ( 2 ) is controllable and / or controllable. Apparatus according to claim 16 or 17, characterized in that in dependence on the temperature of the outside air and optionally a predetermined temperature for the cold room ( 2 ) the evaporator ( 9 ) of the refrigerated cabinet ( 1.1 ; 1.2 ; 1.3 ; 1.4 ; 1.5 ) on or off and / or the actuator is switched on or off. Device according to one of claims 16 to 18, characterized in that it is an electrical device which is microprocessor-controlled. Device according to one of claims 16 to 19, characterized in that the actuator comprises a circulating pump ( 22 ) of a cooling circuit ( 20 ) and / or a fan or blower, in particular the actuator of at least one of the circulating air flow ( 8th ) in cooling furniture generating fans ( 6 ), Fan, blower or the like turbomachine. Kit for converting a refrigerated cabinet with a cold room ( 2 ) for receiving goods to be cooled, at least one recirculating air flow ( 8th ) generating fans ( 6 ), Fan, blower or similar turbomachine and an evaporator ( 9 ) for cooling the circulating air stream ( 8th ), which is used to cool the goods through the cold room ( 2 ) is passed to a refrigerated cabinet ( 1.1 ; 1.2 ; 1.3 ; 1.4 ; 1.5 ) for cooling the cold room ( 2 cold outside air according to any one of claims 1 to 15, wherein the kit comprises at least one inlet ( 3.1 ; 3.2 ) for supplying outside air or outside air cooled fluid in the recirculating air flow ( 8th ) and at least one outlet ( 4.1 ; 4.2 ) for removing air from the circulating air flow ( 8th ) and / or at least one heat exchanger ( 13 ), which for cooling the circulating air stream ( 8th ) of the refrigerated cabinet ( 1.4 ) of cold outside air or by a heat of cold outside air carrying carrier medium is flowed through or is flowed through. Kit according to claim 21, characterized in that at least one fan, fan of the same turbomachine is provided by which cold outside air directly to the refrigerated cabinets ( 1.1 ; 1.2 ; 1.3 ; 1.5 ) or indirectly to a heat exchanger ( 21 ), whose heat transfer medium to the cold room ( 2 ) of the refrigerated cabinet ( 1.4 ) has a cooling effect. Kit according to claim 22, characterized in that a device according to one of claims 16 to 20 is provided, through which the cooling of the operated by means of cold outside air cooling cabinet ( 1.1 ; 1.2 ; 1.3 ; 1.4 ; 1.5 ) is tax / controllable.

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