EP3076108B1 - Dispositif frigorifique et procede de fonctionnement d'un dispositif frigorifique - Google Patents

Dispositif frigorifique et procede de fonctionnement d'un dispositif frigorifique Download PDF

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Publication number
EP3076108B1
EP3076108B1 EP16155221.1A EP16155221A EP3076108B1 EP 3076108 B1 EP3076108 B1 EP 3076108B1 EP 16155221 A EP16155221 A EP 16155221A EP 3076108 B1 EP3076108 B1 EP 3076108B1
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EP
European Patent Office
Prior art keywords
coolant
cooling
fans
cooling device
goods
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16155221.1A
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German (de)
English (en)
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EP3076108A1 (fr
Inventor
Benedikt Geitz
Robert Brockmann
Gerd Odendahl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Viessmann Refrigeration Solutions GmbH
Original Assignee
Viessmann Refrigeration Solutions GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102015117850.8A external-priority patent/DE102015117850A1/de
Application filed by Viessmann Refrigeration Solutions GmbH filed Critical Viessmann Refrigeration Solutions GmbH
Priority to PL16155221T priority Critical patent/PL3076108T3/pl
Publication of EP3076108A1 publication Critical patent/EP3076108A1/fr
Application granted granted Critical
Publication of EP3076108B1 publication Critical patent/EP3076108B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0439—Cases or cabinets of the open type
    • A47F3/0443—Cases or cabinets of the open type with forced air circulation
    • A47F3/0447—Cases or cabinets of the open type with forced air circulation with air curtains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/22—Refrigeration systems for supermarkets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/11—Fan speed control
    • F25B2600/112—Fan speed control of evaporator fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/13—Pump speed control

Definitions

  • a cooling device and a method for operating a cooling device are described, the cooling device having a goods space which is delimited by side walls, a rear wall and a ceiling element and a floor element.
  • the goods compartment of the cooling device is accessible via the side opposite the rear wall.
  • Such cooling devices are used, for example, as cooling shelves in supermarkets. Food that has to be cooled is stored in the goods room. As a rule, food that does not need to be frozen is stored in such refrigerated shelves.
  • the cooling device is supplied with a coolant via a coolant supply line, via which coolant is extracted from the goods space and thus the goods space is cooled.
  • cooling devices which, in addition to a cooling unit and a heat exchanger, have a Have a fan.
  • the cooled air is circulated within the cooling device via the fan.
  • the fans are operated in such a way that a continuous flow of air is established. If there is a higher need for cooling, for example because new goods are brought into a cooling device designed as a cooling shelf, the cooling capacity must be increased.
  • cooling devices from the prior art have locking devices with roller blinds, so that the cooling devices can be closed at night outside of business operations. With a closed cooling device, there is less cooling requirement. In order to always ensure adequate cooling, the flow rate of coolant is changed during operation of the cooling device.
  • the cooling capacity is increased in that a larger amount of coolant is passed over the heat exchanger, so that a larger amount of heat is also absorbed via the coolant and carried away from the cooling device via coolant discharge lines.
  • the cooling device is coupled to a further device which provides the cooling of the coolant.
  • a further device can be designed as a heat pump.
  • a refrigerator / freezer with an interior space to be cooled and a fan module for supplying or transferring air via an evaporation tray is known.
  • the task is to provide an optimal evaporation, for this purpose the fan is arranged in the immediate vicinity of the evaporation tray so that an optimal evaporation can be achieved.
  • a controller can be provided which controls the fan as a function of the air humidity.
  • DE 102 35 783 A1 discloses a refrigeration device with a fan and a control method for it, wherein the speed of the fan can be set differently.
  • the speeds of the fan are determined as a function of the relative duty cycle of a compressor for the refrigeration device designed as an air conditioner.
  • DE 20 2008 000 757 U1 discloses a refrigerator with a fan for generating an air flow in a compartment of the refrigerator to be cooled, the refrigerator having detection means for detecting at least one parameter and a control or regulating unit which is designed such that it determines the speed of the fan as a function of the at least changed a measured parameter.
  • U.S. 4,800,729 A discloses a cooling system with a goods storage room, wherein a fan is provided for air circulation.
  • US 2005/0126196 A1 discloses a cooling shelf with several cooling units arranged next to one another.
  • a cooling device that achieves the above-mentioned object has a goods space to be cooled with surrounding side walls, a rear wall as well as a ceiling element and a floor element, the goods space being at least temporarily accessible via the side opposite the rear wall.
  • the cooling device also has at least one coolant supply line and a coolant discharge line, heat exchangers connected to the coolant supply line and to the coolant discharge line, coolant delivery devices and fans for circulating air cooled by the heat exchangers, the delivery rate of coolant via the coolant delivery means and the amount of air circulated via the fans can be regulated via at least one control device, and the amount of air circulated via the fans can be regulated in accordance with the flow rate of coolant.
  • the delivery rate of coolant is increased by the delivery devices of the respective cooling area and the cooling capacity via the heat exchanger is also increased.
  • the amount of air circulated by the fans is increased so that the goods can be cooled more quickly and efficiently.
  • the cooling device described here in particular when the coolant mass flow is increased, the volume flow of the cooled air via the fan is also increased.
  • the volume flow of cooled air remains constant even when a coolant mass flow is increased.
  • the cooling device described herein enables it with a lower Coolant mass flow to achieve a desired core temperature of the goods or to shorten the time to reach the desired core temperature, whereby the energy consumption is reduced compared to conventional cooling devices.
  • the cooling device also has at least two cooling areas which are arranged next to one another, with at least one coolant delivery device, a heat exchanger and a fan being assigned to each cooling area. Furthermore, a separate control device can be assigned to each cooling area. This allows different cooling areas for different goods to be mapped within a cooling device. For each group of different goods, targeted cooling can be achieved in one of the cooling areas via an adjustable mass flow of the coolant and an adjustable volume flow of the cooled air. In cooling devices, for example, milk products are stored within a cooling device next to sausage or meat products. Different core temperatures are required for the various product types. By designing the cooling device with several cooling areas, core temperatures adapted to the respective product type can be set quickly and in an energy-efficient manner.
  • the targeted circulation of air also allows the cooling areas to be separated from one another.
  • the arrangement of the components and the design of the ceiling element as well as the floor element and the rear wall, on which the coolant delivery devices and the heat exchangers and the fans are preferably arranged, are carried out in such a way that an air flow is established from the ceiling element to the floor element.
  • cooling areas arranged next to one another can be formed which do not influence one another.
  • the cooling device can be specially designed for this Have flow channels, air guide elements and air outlet areas or nozzles and air inlet areas.
  • the coolant delivery devices are speed-controlled pumps, it being possible for the fans to be speed-controlled fans.
  • the pumps are preferably arranged decentrally behind the cooling device and control the amount or the mass flow of the coolant supplied to the heat exchangers.
  • the flow rate is set via the control unit by changing the speed of the pumps. If the speed of the coolant pumps is changed, the control unit immediately changes the speed of the fans, so that an increased volume flow of cooled air is circulated.
  • the design and arrangement of the central pumps can be analogous to that in the German patent application with the file number 10 2015 104 901.5 described manner.
  • the cooling device can furthermore have a closing device which is designed to close the side opposite the rear wall.
  • a closing device which is designed to close the side opposite the rear wall.
  • refrigerated shelves are usually designed to be open on one side so that the goods can be removed from the shelves.
  • the cooling devices are closed, for example by means of roller blinds.
  • a lower cooling capacity is required because there is no exchange of air within the goods area with the ambient air in the supermarket.
  • no more goods are removed from the cooling devices and no new goods are handed over.
  • the flow rate of coolant is usually reduced. At With the cooling devices described here, the volume flow of the fans is then also reduced, which results in a lower power requirement.
  • the above-mentioned object is also achieved by a method for operating a cooling device, the cooling device having side walls surrounding a goods space to be cooled, a rear wall and a ceiling element and a floor element, the goods space being at least temporarily accessible via the side opposite the rear wall, whereby the cooling device has at least one coolant supply line and one coolant discharge line, heat exchangers connected to the coolant supply line and the coolant discharge line, coolant delivery devices and fans for circulating air cooled by the heat exchangers.
  • the flow rate of coolant via the coolant delivery devices and the amount of air circulated via the fans is regulated via at least one control device, the delivery rate of the coolant via the coolant delivery devices based on a cooling requirement for the goods space and the amount of air circulated via the fans be regulated according to the flow rate of the coolant.
  • the mass flow of coolant is regulated in accordance with the cooling requirement for the goods received in the goods space, and the volume flow of the cooled air is regulated as a function of the mass flow.
  • a lower cooling capacity via the heat exchangers is required for the goods received in the goods space to reach a specific core temperature.
  • the cooling device can therefore be operated in an energy-efficient manner, with the total power consumption of the components being lower than with cooling devices from the prior art, in which a certain core temperature for goods accommodated in the goods room is only achieved by adjusting the cooling capacity via the heat exchanger.
  • the cooling device has at least two cooling areas which are arranged next to one another, each cooling area being assigned at least one control device, a coolant delivery device, a heat exchanger and a fan, and the coolant delivery devices and the fans from adjacent areas within the cooling device being controlled independently of one another.
  • the adjacent areas can thus be cooled differently, with a different mass flow of coolant and a different volume flow of cooled air being supplied to each cooling area. In this way, different core temperatures can be provided for different product groups within a cooling device.
  • the coolant delivery devices are speed-controlled pumps, it being possible for the fans to be speed-controlled fans.
  • the flow rate of the coolant is adjusted by changing the speed of the pumps, whereby the flow rate of cooled air can be adjusted by changing the speed of the fans.
  • the Mass flow of coolant and the volume flow of cooled air in accordance with a core temperature to be achieved for the respective cooling area assigned goods and the values recorded by measuring devices.
  • the required cooling requirement and thus the required mass flow of coolant and the required volume flow of cooled air can be determined in advance, for example, and stored for a specific occupancy of the cooling device with goods.
  • the cooling device has a plurality of measuring devices which are designed to detect at least the temperature in the coolant supply lines and coolant discharge lines.
  • the temperature of the circulated air can be recorded before it has been cooled by the heat exchanger and after it has been cooled by the heat exchanger. Depending on the recorded temperatures, the control unit then outputs a signal to change the mass flow of coolant to the coolant delivery device and the volume flow to the fans.
  • the coolant delivery device are speed-controlled pumps and the fans can be speed-controlled fans, the delivery rate of coolant being set by changing the speed of the pumps and the delivery rate of cooled air being adjustable by changing the speed of the fans.
  • the control unit can output a signal to the fans or pumps via which the speed of the fans and pumps can be changed.
  • the cooling device can furthermore have a closing device which is designed to close the side opposite the rear wall, the flow rate of coolant and of cooled air being controlled according to an open or closed position of the closing device.
  • a closing device which is designed to close the side opposite the rear wall, the flow rate of coolant and of cooled air being controlled according to an open or closed position of the closing device.
  • the delivery rate of cooled air can be increased in particular when the delivery rate of coolant is increased.
  • the method can also control the flow rate of cooled air in accordance with the mass flow of coolant in such a way that the volume flow of cooled air via the fans is increased even if there is no increase in the mass flow of coolant. For example, with a smaller increase in the coolant temperature in the return line in the coolant return line, the required additional cooling capacity can be provided by an increased volume flow of cooled air.
  • the volume flow of cooled air via the fans in the respective cooling areas can only then be increased when the temperature in the return line in a coolant supply line exceeds a definable threshold.
  • the difference between the normally required cooling capacity and the increased cooling capacity is provided solely via the additional flow rate of coolant.
  • the volume flow of cooled air via the fan is only increased if the cooling requirement exceeds a definable amount. For example, if the temperature of the coolant rises and exceeds a definable threshold value.
  • the cooling device of the variants described above and below can also have a central regulating / control unit which controls the operation of the individual components and communicates with the components.
  • the regulating / control unit can also control the communication between the individual components.
  • further measuring devices can be provided, such as devices for measuring the flow rate and the mass flow of the coolant.
  • the heat exchangers of a cooling device of the variants described herein can be plate heat exchangers, for example.
  • a brine can be used as the coolant, and the brine can be a water-glycol mixture.
  • all coolants intended for refrigeration systems can be used.
  • the cooling device has ventilation openings or ventilation slots on the floor element and on the ceiling element in the area which is designed to be open. Cooled air flows out through ventilation openings on the ceiling element and returns to the cooling device through the ventilation openings in the floor element.
  • the cooling device has to circulate the air flow channels in the floor element, the ceiling element and the rear wall. The air received in the ducts is circulated via the at least one fan, so that the cooled air flows along the rear wall and the floor element as well as the ceiling element and exits through the ventilation openings and again. This provides cooling of the walls of the cooling device and cooling of the goods space via the air flow.
  • the goods 92 can include, for example, dairy products, meat or sausage products and / or fruits and vegetables.
  • the cooling device 10 has a goods space 12 which is surrounded by two side walls 14 of a rear wall 16 as well as a ceiling element 18 and a floor element 20.
  • the side walls 14, the rear wall 16, the ceiling element 18 and the floor element 20 are designed analogously to the cooling devices known from the prior art. Therefore, these parts are designed at least on their side facing the goods space 12 so that the goods space 12 can be cooled, with no or only no or only no cooling from outside the cooling device 10 via the rear wall 16, the ceiling element 18, the floor element 20 and the side walls 14 there is little heat transfer.
  • the cooling device 10 has three cooling areas 30, 50 and 70. These cooling areas 30, 50 and 70 are shown schematically by the dashed line.
  • the cooling device 10 is designed such that the individual cooling areas 30, 50 and 70 do not have to be separated by partition walls. The design of the cooling device 10 makes it possible to operate the individual cooling areas 30, 50 and 70 independently of one another and at different temperatures.
  • the first cooling device 30 has at least one pump 34, a cooling unit 36 and a control device 42.
  • measuring devices 32 and 44 are provided.
  • the temperature and the flow rate of coolant can be recorded via the measuring devices 32 and 44.
  • the cooling unit 36 has at least one fan 40 and a plate heat exchanger 38.
  • To cool the cooling area 30 is about a central coolant supply line 22 supplies a coolant to the heat exchanger 38 via the pump 34. Heat from the goods space 12 in the cooling area 30 is absorbed via the heat exchanger 38 and the heated coolant is fed to a central coolant discharge line 24 via a coolant discharge line.
  • the speed of the pump 34 is controlled via the regulating device 42.
  • the speed of the fan 40 is controlled via the regulating device 42.
  • the speed of the fan 40 is controlled as a function of the speed of the pump 34.
  • the measuring devices 32 and 44 can also be connected to the control device 42.
  • the control device 42 is also transmitted data such as the temperature of the coolant in the flow and return and the flow rate of the coolant.
  • the control device 42 is designed to control the temperature in the cooling area 30.
  • a central control unit can also be provided which is coupled to the respective regulating devices 42, 62 and 82.
  • the coolant is supplied via the coolant supply line 22 at a certain flow temperature.
  • the pump 34 regulates the flow rate of the coolant as a function of a cooling requirement. If the speed of the pump 34 is increased to increase the mass flow of coolant, the speed of the fan 40 is also increased via the control device 42. This results in a larger volume flow of cooled air in the goods space 12 and in particular in the cooling area 30.
  • the return temperature of the coolant is recorded via the measuring device 44. If the return temperature rises above a certain level or exceeds a threshold value, the control device 42 causes the increase the speed of the pump 34 and the increase in the speed of the fan 40.
  • the speed of the pump 34 in the cooling device 10 described herein can be less strong increase. If the speed of the pump 34 is increased to the same extent as is done, for example, in the prior art, the increase in the speed of the fan 40 causes a greater circulation of the cooled air, so that faster cooling of goods 92 is achieved.
  • the plates of the heat exchanger 38 can, for example, encompass areas of the rear wall 16 or lie against areas of the rear wall 16.
  • the fan 40 is arranged in such a way that the air conveyed by the fan 40 is cooled by the heat exchanger 38.
  • the second cooling area 50 has at least one pump 54, a cooling unit 56 with a heat exchanger 58 and a fan 60 as well as a control device 62 and measuring devices 52, 54 and 66.
  • the third cooling area 70 analogously to the first cooling area 30 and the second cooling area 50, has at least one pump 74, a cooling unit 76 with a heat exchanger 78 and a fan 80, and a control device 82.
  • the third cooling area 70 has measuring devices 72, 84 and 86.
  • the pumps 34, 54 and 74 are connected to the central and common coolant supply line 22.
  • the return lines of the respective cooling areas 30, 50 and 70 are connected to a central and common coolant discharge line 24.
  • the coolant supply line 22 and the coolant discharge line 24 are provided with a cooling device such as for example connected to a heat pump. The coolant is brought to a certain flow temperature via the heat pump.
  • the design of the individual cooling areas 30, 50 and 70 ensures that a specific cooling can be achieved for the respective cooling area 30, 50 or 70 independently of the other cooling areas 30, 50 and 70.
  • the speed of the pumps 34, 54 and 74 can be controlled independently of one another via the regulating device 42, 62 and 82 as well as the speed of the fans 40, 60 and 80.
  • a core temperature of 2 degrees Celsius for goods 92 received in cooling area 30 can be achieved, with a core temperature for goods 92 of 4 degrees Celsius in second cooling area 50 and a core temperature for goods 92 of 3 degrees Celsius in third cooling area 70 can be adjusted.
  • the increase in the speed of the fans 40, 60 and 80 with an increase in the speed of the pumps 34, 54 and 74 supports the cooling of the goods 92 received in the goods space 12, so that the core temperature of the goods 92 is reached more quickly.
  • a larger air stream then flows over the goods 92 per unit of time, a larger amount of heat being dissipated from the goods 92 and the goods 92 being cooled.
  • the air is heated more strongly until it reaches the lower region of the goods space 12. The heat absorption capacity is therefore lower.
  • the amount of cooled air is also smaller, so that the time to reach the desired core temperature is greater than with an increased volume flow of cooled air by increasing the speed of the fans 40, 60 and 80.
  • Fig. 2 shows a schematic sectional view through a cooling device 10.
  • the cooling device 10 is shown with a view of the third cooling area 70.
  • the cooling device 10 has two connections 88 and 90 on the ceiling element 18.
  • the connection 88 is connected to the coolant supply line 22 and the connection 90 is connected to the coolant discharge line 24.
  • the arrows show the direction of flow of the coolant.
  • the schematically illustrated pump 74 and the schematically illustrated cooling unit 76 are arranged on the rear wall 16 or within a rear wall arrangement.
  • the control device 82 is arranged on the outside of the rear wall 16.
  • the representation shown is schematic and shows only one possible embodiment among a large number of variants.
  • control device 82 can also be arranged in different positions within the cooling device 10.
  • the control lines between the control device 82 and the pump 74 as well as the cooling unit 76 are shown via the dashed lines.
  • the flow and return lines for the coolant are also indicated schematically.
  • the measuring devices 72, 84 and 86 are in Fig. 2 not shown.
  • the arrangement of the cooling unit 76 can also differ from that in FIG Fig. 2 shown. Only the arrangement of the pump 74 in front of the cooling unit 76 in the coolant flow direction is necessary for the cooling device 10 so that the supply of coolant to the heat exchanger 78 can be controlled or regulated via the pump 74 in accordance with a cooling requirement.
  • Areas of the rear wall arrangement which face the goods space 12 can be coupled to the heat exchanger 78 or be part of the heat exchanger 78.
  • the fan 80 is arranged to allow air to pass through the heat exchanger 78 is performed and thereby cooled.
  • the direction of flow of the air is partially shown schematically by arrow 96.
  • the cooling device 10 has cooling channels running inside the cooling device 10.
  • the cooling device 10 has an outlet opening or an outlet region for cooled air on the ceiling element 18. The cooled air flows downwards via this upper exit area, as shown by arrow 96, and is drawn in via an air inlet opening on the base element 20 via the fan 80.
  • the fan 80 guides the heated air over the heat exchanger 78 and again to the ceiling element 18, the cooled air flowing along the rear wall and therefore also cooling the rear wall arrangement. Air is circulated through the cooling space 12 in the direction indicated by the arrow 96. If an increased need for cooling is determined for the goods 92 received in the goods space 12, the speed of the pump 74 is increased so that a larger mass flow of coolant is fed to the heat exchanger 78. In addition, the speed of the fan 80 is increased via the control device 82, as a result of which a larger volume flow of cooled air is established. The cooled air does not heat up so much with a stronger volume flow, so that heat can still be absorbed in a lower area of the goods space 12.
  • the rear wall arrangement and the ceiling element 18, the rear wall arrangement can have opening slots on the side facing the goods space 12, so that air cooled through this can also flow into the goods space 12.
  • the ceiling element 18, the floor element 20 and the Side walls can have openings through which air can flow in and out.
  • the cooling device 10 also has a closing device 94.
  • the closing device 94 serves to close the goods space 12 so that no or only a slight heat exchange takes place between the air in the goods space 12 and the goods 92 in the goods space 12 and the environment surrounding the cooling device 10.
  • Fig. 3 shows a schematic section through the cooling device 10 with a closed goods space 12.
  • a roller blind 98 which closes the goods space 12, is lowered.
  • the roller blind 98 can be designed to be insulating in order to reduce or prevent an exchange of heat between the goods space 12 and the surroundings of the cooling device 10. Since there is less heat input into the goods space 12 via the surroundings of the cooling device 10, there is also a reduced need for cooling.
  • the speed of the pump 74 is correspondingly reduced and, at the same time, the speed of the fan 78.
  • the speed of the fan 80 is always adapted to the delivery rate of the pump 74. With a high delivery rate of the pump 74 and the pumps 34 and 54, the fans 40, 60 and 80 are activated accordingly.
  • An increase in the volume flow via the fans 40, 60 and 80 results in faster cooling of the goods space 12 and, above all, the goods 92 received in the goods space 12. If the fans 40, 60 and 80 generate a larger volume flow of cooled air through the goods space 12 out, a smaller reduction in the flow temperature of the coolant is necessary in order to achieve a higher cooling performance, for example when introducing new goods 92. With conventional Cooling devices from the prior art always have to reduce the flow temperature significantly when new goods 92 are introduced. In contrast, the cooling devices 10 and methods for operating the cooling devices 10 described herein enable the cooling of goods 92 newly brought into the goods space 12 even with a lower reduction in the supply temperature of the coolant the core temperature of the goods 92 can be carried out faster than with cooling devices from the prior art.
  • the lowering of the supply temperature of the coolant must be carried out over a shorter period of time than in the case of cooling devices from the prior art. This has a particularly cost-effective effect on the operation of the cooling device 10.
  • the components such as the pumps 24, 54 and 74 can have a lower delivery rate if a larger volume flow of cooled air is guided through the goods space 12 via the fans 40, 60 and 80.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Claims (7)

  1. Dispositif de refroidissement avec des parois latérales (14) entourant un espace de stockage (12) à réfrigérer, une paroi arrière (16) ainsi qu'un élément de plafond (18) et un élément de sol (20), l'espace de stockage (12) étant au moins temporairement accessible via le côté opposé à la paroi arrière (16), présentant au moins une conduite d'acheminement de fluide de refroidissement (22) et une conduite d'extraction de fluide de refroidissement (24), un échangeur de chaleur (38 ; 58 ; 78) relié à la conduite d'acheminement de fluide de refroidissement (22) et à la conduite d'extraction de fluide de refroidissement (24), des dispositifs de transport du fluide de refroidissement et des ventilateurs (40 ; 60 ; 80) destinés à faire circuler de l'air refroidi par les échangeurs de chaleur (38 ; 58 ; 78), où
    - le dispositif de refroidissement (10) présente au moins deux domaines de refroidissement (30 ; 50 ; 70) disposés l'un à côté de l'autre, au moins un dispositif de transport du fluide de refroidissement, un échangeur de chaleur (38 ; 58 ; 78) et un ventilateur (40 ; 60 ; 80) étant affectés à chaque domaine de refroidissement (30 ; 50 ; 70),
    caractérisé en ce que
    - on peut réguler le débit du fluide de refroidissement via les dispositifs de transport du fluide de refroidissement et la quantité de l'air déplacé via les ventilateurs (40 ; 60 ; 80) via au moins un dispositif de régulation (42 ; 62 ; 82),
    - on peut réguler la quantité de l'air déplacé via les ventilateurs (40 ; 60 ; 80) en fonction de la mesure du débit du fluide de refroidissement, et
    - les dispositifs de transport du fluide de refroidissement sont des pompes à régime régulé (34 ; 54 ; 74).
  2. Dispositif de refroidissement selon la revendication 1, dans lequel les ventilateurs (40 ; 60 ; 80) sont des ventilateurs à régime régulé.
  3. Dispositif de refroidissement selon la revendication 1 ou 2, présentant un dispositif de fermeture (94) conçu pour fermer le côté opposé à la paroi arrière (16).
  4. Procédé d'utilisation d'un dispositif de refroidissement qui présente des parois latérales (14) entourant un espace de stockage (12) à réfrigérer, une paroi arrière (16) ainsi qu'un élément de plafond (18) et un élément de sol (20), l'espace de stockage (12) étant au moins temporairement accessible via le côté opposé à la paroi arrière (16), le dispositif de refroidissement (10) présentant au moins une conduite d'acheminement de fluide de refroidissement (22) et une conduite d'extraction de fluide de refroidissement (24), des échangeurs de chaleur (38 ; 58 ; 78) reliés à la conduite d'acheminement de fluide de refroidissement (22) et à la conduite d'extraction de fluide de refroidissement (24), des dispositifs de transport du fluide de refroidissement et des ventilateurs (40 ; 60 ; 80) destinés à faire circuler de l'air refroidi par les échangeurs de chaleur (38 ; 58 ; 78), et où
    - le dispositif de refroidissement (10) présente au moins deux domaines de refroidissement (30 ; 50 ; 70) disposés l'un à côté de l'autre, au moins un dispositif de régulation (42 ; 62 ; 82), un dispositif de transport du fluide de refroidissement, un échangeur de chaleur (38 ; 58 ; 78) et un ventilateur (40 ; 60 ; 80) étant affectés à chaque domaine de refroidissement (30 ; 50 ; 70), et où les dispositifs de transport du fluide de refroidissement et les ventilateurs (40 ; 60 ; 80) de domaines voisins (30 ; 50 ; 70) à l'intérieur du dispositif de refroidissement (10) sont commandés indépendamment les uns des autres,
    caractérisé en ce que
    - on peut réguler le débit du fluide de refroidissement via les dispositifs de transport du fluide de refroidissement et la quantité de l'air déplacé via les ventilateurs (40 ; 60 ; 80) via les dispositifs de régulation (42 ; 62 ; 82),
    - le débit du fluide de refroidissement via les dispositifs de transport du fluide est régulée en fonction du besoin de refroidissement pour l'espace de stockage (12),
    - la quantité de l'air déplacé via les ventilateurs (40 ; 60 ; 80) est régulée en fonction du débit du fluide de refroidissement, et
    - les dispositifs de transport du fluide de refroidissement sont des pompes à régime régulé (34 ; 54 ; 74) et le débit de fluide de refroidissement est réglée par une modification de la vitesse de rotation des pompes (34 ; 54 ; 74).
  5. Procédé selon la revendication 4, dans lequel les ventilateurs (40 ; 60 ; 80) sont des ventilateurs à régime réglé et le débit d'air refroidi est réglée par une modification de la vitesse de rotation des ventilateurs (40 ; 60 ; 80).
  6. Procédé selon la revendication 4 ou 5, dans lequel le dispositif de refroidissement (10) présente un dispositif de fermeture (94) conçu pour fermer le côté opposé à la paroi arrière (16) et dans lequel le débit du fluide de refroidissement et d'air refroidi sont commandés en fonction d'une position d'ouverture ou de fermeture du dispositif de fermeture (94).
  7. Procédé selon l'une des revendications 4 à 6, dans lequel le débit d'air refroidi est augmentée si le débit du fluide de refroidissement est augmentée.
EP16155221.1A 2015-03-30 2016-02-11 Dispositif frigorifique et procede de fonctionnement d'un dispositif frigorifique Active EP3076108B1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050126196A1 (en) * 2003-12-15 2005-06-16 Hussmann Corporation Modular refrigeration system

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Publication number Priority date Publication date Assignee Title
JPS6358079A (ja) * 1986-08-27 1988-03-12 ホシザキ電機株式会社 恒温多湿冷蔵庫
KR100187197B1 (ko) * 1996-12-16 1999-05-01 삼성전자주식회사 간냉식 냉장고의 냉기 토출 장치 및 그 제어 방법
JPH11183012A (ja) * 1997-12-22 1999-07-06 Shinsei Reizou Kogyo Kk オープンショーケース、冷蔵庫等の冷蔵方法
DE19904667A1 (de) * 1999-02-04 2000-08-10 Stulz Gmbh Klimagerät zur Temperaturregulierung
DE10235783B4 (de) * 2002-08-05 2008-02-14 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit Ventilator und Steuerverfahren dafür
DE202008000757U1 (de) * 2007-12-28 2009-04-30 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
DE102012018021A1 (de) 2012-09-12 2014-03-13 Liebherr-Hausgeräte Lienz Gmbh Kühl- und/oder Gefriergerät

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050126196A1 (en) * 2003-12-15 2005-06-16 Hussmann Corporation Modular refrigeration system

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