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US20150000318A1 - Cooling device and method for controlling a cooling device - Google Patents

Cooling device and method for controlling a cooling device Download PDF

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Publication number
US20150000318A1
US20150000318A1 US14/366,656 US201214366656A US2015000318A1 US 20150000318 A1 US20150000318 A1 US 20150000318A1 US 201214366656 A US201214366656 A US 201214366656A US 2015000318 A1 US2015000318 A1 US 2015000318A1
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United States
Prior art keywords
cooling
temperature value
cooling space
compressor
comparison
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.)
Abandoned
Application number
US14/366,656
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English (en)
Inventor
Admilson Pinto
Uwe Schramer
Mario Lentz
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.)
NSFOCUS Information Technology Co Ltd
Dometic SARL
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Dometic SARL
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Filing date
Publication date
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Assigned to DOMETIC S.A.R.L. reassignment DOMETIC S.A.R.L. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LENTZ, Mario, PINTO, ADMILSON, DR., SCHRAMER, Uwe
Assigned to NSFOCUS INFORMATION TECHNOLOGY CO., LTD reassignment NSFOCUS INFORMATION TECHNOLOGY CO., LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHENG, LIJUN, DUAN, Yuxuan, HAN, PENG
Publication of US20150000318A1 publication Critical patent/US20150000318A1/en
Abandoned legal-status Critical Current

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    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • 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
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • 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
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
    • 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
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
    • F25B27/005—Machines, plants or systems, using particular sources of energy using solar energy in compression type systems
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices
    • 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
    • F25B2400/06—Several compression cycles arranged in parallel
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/29—High ambient temperatures
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/31—Low ambient temperatures
    • 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
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • 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
    • F25B2600/25—Control of valves
    • F25B2600/2507—Flow-diverting valves
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
    • Y02A40/963—Off-grid food refrigeration
    • Y02A40/966—Powered by renewable energy sources

Definitions

  • the present invention relates to a cooling device having at least one regeneratively operated primary cooling circuit, wherein the cooling circuit has at least one compressor, at least one condenser, at least one evaporator, at least one cooling space, at least one temperature sensor for measuring the cooling space temperature in the cooling space, and a controller, wherein a desired temperature value of the cooling space and a comparison temperature value can be stored in the controller.
  • the present invention further relates to a method for controlling a cooling device.
  • cooling devices are employed in remote areas, in particular in developing countries where a stable and safe energy supply under normal circumstances cannot be ensured.
  • delicate goods such as for example medical products or food that need to be cooled can be stored safely, whereby the quality of life of the local people can be improved.
  • the World Health Organization has made a catalogue with threshold criteria that has to be fulfilled by the used cooling device and the used cooling equipment for the transport and storage of medical products.
  • the cooling temperature is substantially in the range between +2° C. and +8° C., and this temperature range can be maintained over at least three days also independent from the power supply.
  • the cooling device according to the invention in contrast to the cooling devices known from the prior art is characterized in that the cooling of the cooling space can be interrupted by the controller and the comparison temperature value can be changed by the controller depending on the time and/or the cooling space temperature.
  • This is advantageous in that there is no permanent cooling capacity, but the cooling can be interrupted when a desired cooling space temperature has been reached. This is achieved by comparison of the comparison temperature value with the cooling space temperature.
  • the controller can reduce the comparison temperature value such that a further cooling of the cooling space or the used cooling elements takes place, respectively.
  • the primary cooling circuit has at least one extra cooling space and at least one extra evaporator assigned to the extra cooling space.
  • the extra evaporator is connected to the primary cooling circuit via a valve, and the cooling of the cooling space can preferably be interrupted by switching the valve.
  • the extra cooling space has a storage tank with which the cooling space can be cooled in the absence of energy.
  • the extra cooling space may be a freezing compartment for cooling ice bags or the like. Latter may be used to transport medical products for shorts routes.
  • the cooling device has a second cooling circuit with a second compressor for cooling a second cooling space, wherein the second compressor can be supplied with energy via a switch.
  • a second cooling circuit for cooling a further cooling space can be used.
  • the second cooling space may have for example a storage tank or may be a freezing compartment.
  • the cooling device has an additional circuit, wherein the controller can be supplied with energy via the additional circuit. So the energy supply of the controller is independent from the energy supply of the cooling circuit.
  • the additional circuit has a transformer. In this way, also with a drop in voltage in the input voltage a constant output voltage can be maintained. This prevents a switching-off of the controller also in a drop of voltage that can be conditional on the turn-on transient of the compressor, for example.
  • the additional circuit has at least one condenser.
  • the controller can be supplied with energy even if actually no energy is available any more, for example during a solar insolation-free time conditional on clouds.
  • the solution of the problem is accomplished in that the comparison temperature value in switching on the controller corresponds to the desired temperature value, and the cooling of the cooling space is interrupted if the actual cooling space temperature has reached the comparison temperature value, wherein the comparison temperature value is reduced after a predetermined time period by a stored correction value as long as the actual cooling space temperature has not reached the comparison temperature value within a predetermined time period. That is, if the desired cooling space temperature has not yet been reached after the predetermined time period the comparison temperature value is reduced.
  • Background here is that a non-reaching of the desired temperature value within the predetermined time period also indicates a relatively high initial or outdoor temperature, respectively, so that the cooling space preferably is cooled more and over a prolonged time period, so that the used cooling elements completely freeze.
  • the correction value is not chosen so high that the temperature in the cooling space falls under a critical range in which the cooled good can be damaged.
  • the cooling of the cooling space is interrupted by switching off the compressor of the primary cooling circuit. It is particularly suitable if the compressor is switched off if the actual cooling space temperature falls below a comparison temperature value by a hysteresis value and the compressor is switched on if the actual cooling space temperature exceeds the comparison temperature value by a hysteresis value. In this way, an excessive cooling or an excessive heating, respectively, of the cooling space is prevented. In other words, the actual cooling space temperature oscillates by the comparison temperature value, wherein the variations correspond to the hysteresis value. Therefore, also a delayed response of the cooling circuit or the compressor, respectively, can be taken into account.
  • the comparison temperature value is gradually increased by an amount of the stored correction value until the comparison temperature value corresponds to the desired temperature value with the comparison temperature value being increased in switching off the compressor by the next step. So it is ensured that the compressor runs as long as possible and cooling elements used for cooling the cooling space are completely frozen before the desired temperature value is reached.
  • the cooling of the cooling space is interrupted by switching the valve. It is particularly suitable if the valve is switched if the actual cooling space temperature falls below the comparison temperature value by a hysteresis value and the valve is switched if the actual cooling space temperature exceeds the comparison temperature value by the hysteresis value. That means, that by switching the valve the extra cooling space is cooled by the extra evaporator until the valve switches again and the evaporator again cools the cooling space. This is advantageous in that the compressor permanently runs and in phases wherein the cooling space must not be cooled the extra cooling space is cooled.
  • the comparison temperature value is increased by an amount of the stored correction value until the comparison temperature value corresponds to the desired temperature value, wherein in switching the valve the comparison temperature value is increased by the next step. This ensures that the compressor operating time is at the maximum and as much cold as possible can be stored.
  • the second compressor is supplied with energy if the compressor of the primary cooling circuit is switched off. If there is sufficient energy available it is particularly suitable if the compressor of the primary cooling circuit and the second compressor are simultaneously supplied with energy. So, a maximum cold yield from the available energy can be achieved.
  • the output voltage of the additional circuit is maintained constant independent of the input voltage by the DC transformer.
  • the controller does not switch off when the input voltage briefly drops for example by the turn-on transient of the compressor. This is in particular the case, if there is briefly not enough energy available, for example due to a cloud, and therefore the compressor switches off.
  • the switch-off of the controller by the at least one condenser of the additional circuit during a critical time period is prevented.
  • a critical time period the time period can be understood at which no energy is available despite solar insolation. This is in particular the case due to clouds or animals or vehicles standing in front of the solar module.
  • the capacity of the at least one condenser should be chosen such that a normally anticipated critical time period can be bridged.
  • FIG. 1 schematically shows a principle sketch of the construction of the cooling device according to the invention
  • FIG. 2 schematically shows an operation image of a cooling device according to the invention with a primary cooling circuit and a second cooling circuit;
  • FIG. 3 schematically shows a time chart for the cooling space temperature, the comparison temperature value, and the compressor operating time for a cooling device with a primary cooling circuit from putting into operation;
  • FIG. 4 schematically shows a time chart for the cooling space temperature, the comparison temperature value, and the compressor operating time for a cooling device with a primary cooling circuit after putting into operation;
  • FIG. 5 schematically shows a time chart for the cooling space temperature, the comparison temperature value, the compressor operating time, and the valve position for a cooling device with a primary cooling circuit with two evaporators.
  • FIG. 1 shows a sketch of the principle construction of the cooling device 1 according to the invention.
  • the illustrated cooling device 1 has a primary cooling circuit 2 (for that, see FIG. 2 ), a controller 6 , and an additional circuit 11 .
  • the controller 6 is connected to the various components of the cooling circuit 2 via control lines 18 .
  • the represented cooling system 1 is re-generatively supplied with energy by a solar module 16 converting the light of the sun into electric energy. Then, the energy is supplied via power lines 17 , wherein the controller 6 is supplied with energy independently of the remaining cooling circuit 2 via the additional circuit 11 .
  • the additional circuit 11 has a DC transformer (not illustrated) and a plurality of condensers (not illustrated) to maintain the output voltage for supplying the controller 6 also in case of a drop of the input voltage.
  • the condensers permit an energy supply of the controller 6 when the insolation of the sun does not provide sufficient energy for operation. In particular, with the condensers thus a prolonged cloud period or the like can be bridged.
  • FIG. 2 an operation image of a cooling device according to the invention with a primary cooling circuit 2 and a second cooling circuit 9 is illustrated.
  • the primary cooling circuit 2 consists of a compressor 3 , a condenser 4 , a filter drier 14 as well as two evaporators 5 , 7 that are connected to the cooling circuit 2 via a valve 8 . Between the valve 8 and the evaporators 5 , 7 each a throttle 15 arranged. Via the evaporator 5 the cooling space (not illustrated) is cooled and via the extra evaporator 7 the extra cooling space (not illustrated) is cooled.
  • the latter may be for example a storage tank or a freezing compartment.
  • the controller 6 is connected to the compressor 3 via a first control line 19 , so that the compressor 3 can be switched on and off by the controller.
  • the valve 8 which in particular is a three-way solenoid valve, is connected to the controller 6 a via a second control line 20 , so that the controller 6 can switch the cooling circuit either to the evaporator 5 or to the extra evaporator 7 .
  • the controller 6 detects the actual temperature in the cooling spaces via temperature sensors to obtain an optimum cooling.
  • FIG. 2 a second cooling circuit 9 with a second compressor 10 , a second condenser 13 , a filter drier 14 , and a second evaporator 12 is illustrated.
  • a throttle 15 is arranged upstream of the second evaporator 12 .
  • This second cooling circuit 9 is used for cooling a second cooling space (not shown) that may be for example a storage tank or a freezing compartment.
  • the second compressor 10 is connected to the controller 6 via a third control line 21 , so that the second compressor 10 can be switched on and off by the controller 6 . That is, in the example illustrated in FIG. 2 the controller 6 can control the cooling of three cooling spaces in total by switching on and off the compressors 3 , 10 and/or by switching the valve 8 .
  • FIG. 3 shows a time chart for the cooling of a cooling device with a primary cooling circuit and a cooling space when putting the cooling device into operation.
  • the temperature in the cooling space T air corresponds to the ambient temperature.
  • the controller switches on the compressor (C on) and the cooling circuit begins to cool the cooling space whereby the cooling space temperature T air decreases.
  • a desired temperature value SET, a comparison temperature value T SET and a hysteresis value HW are stored in the controller.
  • the comparison temperature value T SET corresponds to the desired temperature value SET.
  • the controller measures the temperature in the cooling space T air via a temperature sensor and matches it with the comparison temperature value T SET .
  • the controller reduces the comparison temperature value T SET by a stored correction value d SET .
  • the stored correction value d SET is chosen such that there is no reduction of the comparison temperature value T SET below 0° C.
  • the cooling of the cooling space now is continued until the temperature in the cooling space T air has reached the now reduced comparison temperature value T SET minus the hysteresis value HW.
  • the controller switches off the compressor (C off).
  • the comparison temperature value T SET is gradually increased.
  • each increase of the comparison temperature value T SET in n steps corresponds to the n-th part of the correction value d SET .
  • the controller Since the controller has an energy supply independent of the compressor also in a brief switch-off of the compressor by lacking solar insolation the cycle is not restarted every time, but continued from the point of interruption. If at the end of the solar cycle, that is at nightfall, not all n steps should have been completed, then the comparison temperature value T SET for the next solar cycle is set back to the desired temperature value SET. In this way, the compressor operating time is maximized and ensured that the cooling elements do completely and homogeneous freeze.
  • Cooling space temperature when putting into operation T air 30° C.
  • Desired temperature value SET 5° C.
  • Hysteresis value HW 0.1° C.
  • the compressor When putting the cooling device into operation the compressor is switched on and the cooling space temperature T air of 30° C. starts to drop.
  • the cooling space temperature T air When after 6 h the cooling space temperature T air is e.g. 9° C. and thus is higher than the comparison temperature value T SET of 5° C., the comparison temperature value T SET is reduced by the correction value d SET to 3° C.
  • the cooling space temperature T air starts to rise.
  • FIG. 4 a time chart is illustrated that continues the time chart of FIG. 3 .
  • the comparison temperature value T SET is already again identical to the desired temperature value SET and the compressor is switched on and off as stated above.
  • the temperature in the cooling space T air oscillates around the comparison temperature value T SET . If now there is a longer interruption of the energy supply, for example at night, the compressor is switched off (C off) and the temperature in the cooling space T air rises. As soon as energy is available again the compressor is switched on (C on) and the cycle described in FIG. 3 is restarted.
  • the comparison temperature value T SET corresponds to the desired temperature value SET.
  • the cooling space temperature T air reaches the comparison temperature value T SET within the time t, wherein this time period t is less than the predetermined time period t 0 .
  • the comparison temperature value T SET is not reduced by the correction value d SET , but remains identical to the desired temperature value SET.
  • FIG. 5 in principal shows the same time chart as in FIG. 3 , wherein in this example additionally an extra evaporator and an extra cooling space are provided that can be controlled by a valve (V).
  • the temperature of the extra cooling space T buffer when putting into operation corresponds to the ambient temperature and thus the cooling space temperature T air .
  • the compressor is not switched off if the cooling space temperature T air corresponds to the comparison temperature value T SET , but the valve is switched such that the extra cooling space (V on) is cooled and the temperature in the extra cooling space T buffer drops.
  • the comparison temperature value T SET is gradually increased by the n-th part of the correction value d SET .
  • the valve is switched off again (V off) and the cooling space is cooled, whereby the cooling space temperature T air drops again.
  • the valve is only switched again when the cooling space temperature T air has reached the comparison temperature value T SET minus the hysteresis value HW. This process is then repeated for n times in total until the comparison temperature value T SET again corresponds to the desired temperature value SET.
  • the compressor is not switched off during the whole cycle, but remains permanently switched on (C on).

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
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US14/366,656 2011-12-20 2012-09-10 Cooling device and method for controlling a cooling device Abandoned US20150000318A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102011121554 2011-12-20
DE102011121554.2 2011-12-20
PCT/EP2012/067607 WO2013091914A1 (de) 2011-12-20 2012-09-10 Kühlvorrichtung und verfahren zur steuerung einer kühlvorrichtung

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US (1) US20150000318A1 (da)
EP (1) EP2795206B1 (da)
KR (2) KR20170043680A (da)
CN (1) CN104024767B (da)
AU (1) AU2012359096B2 (da)
DK (1) DK2795206T3 (da)
HK (1) HK1199922A1 (da)
IN (1) IN2014DN05650A (da)
WO (1) WO2013091914A1 (da)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120272674A1 (en) * 2010-01-22 2012-11-01 Lg Electronics Inc. Refrigerator and method for controlling the same
US20140290905A1 (en) * 2011-06-15 2014-10-02 Voltalis Heating, ventilation and/or air-conditioning device with targeted power-supply management
US20150330651A1 (en) * 2014-05-15 2015-11-19 Lennox lndustries Inc. Accommodating cssh for tandem compressor transitions
ITUB20153888A1 (it) * 2015-09-25 2017-03-25 Castel Mac Spa Procedimento di azionamento di un abbattitore termico per prodotti alimentari
USD820049S1 (en) 2016-11-22 2018-06-12 Dometic Sweden Ab Cooler
USD836994S1 (en) 2017-05-17 2019-01-01 Dometic Sweden Ab Cooler
USD836993S1 (en) 2017-05-17 2019-01-01 Dometic Sweden Ab Cooler
IT201800020254A1 (it) * 2018-12-20 2020-06-20 Cold Line Srl Metodo di funzionamento di apparecchiature per l'abbattimento e la surgelazione di prodotti alimentari e di prodotti deperibili, e apparecchiatura per l'abbattimento attuante il metodo
USD894043S1 (en) 2017-12-14 2020-08-25 Dometic Sweden Ab Zipper pull
WO2020208188A3 (en) * 2019-04-12 2020-11-19 Société des Produits Nestlé S.A. Optimization of energy utilization in solar powered freezer or cooler system
USD904830S1 (en) 2017-12-14 2020-12-15 Dometic Sweden Ab Soft bag cooler
USD907074S1 (en) 2016-11-25 2021-01-05 Dometic Sweden Ab Refrigerating apparatus
USD933449S1 (en) 2016-11-22 2021-10-19 Dometic Sweden Ab Latch
CN114294738A (zh) * 2021-12-30 2022-04-08 深圳市鑫嘉恒科技有限公司 一种具有不间断供能作用的户外空调
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RU2787414C2 (ru) * 2018-06-18 2023-01-09 Шнейдер Электрик Эндюстри Сас Способ управления установкой охлаждения, соединенной с электрическим кожухом
USD1002676S1 (en) 2019-08-30 2023-10-24 Dometic Sweden Ab Appliance
USD1026969S1 (en) 2020-08-31 2024-05-14 Dometic Sweden Ab Refrigerator

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Cited By (29)

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US9816749B2 (en) * 2010-01-22 2017-11-14 Lg Electronics Inc. Refrigerator and method for controlling the same
US20120272674A1 (en) * 2010-01-22 2012-11-01 Lg Electronics Inc. Refrigerator and method for controlling the same
US20140290905A1 (en) * 2011-06-15 2014-10-02 Voltalis Heating, ventilation and/or air-conditioning device with targeted power-supply management
US10060657B2 (en) * 2011-06-15 2018-08-28 Voltalis Heating, ventilation and/or air-conditioning device with targeted power-supply management
US10247460B2 (en) * 2014-05-15 2019-04-02 Lennox Industries Inc. Accommodating CSSH for tandem compressor transitions
US20150330651A1 (en) * 2014-05-15 2015-11-19 Lennox lndustries Inc. Accommodating cssh for tandem compressor transitions
ITUB20153888A1 (it) * 2015-09-25 2017-03-25 Castel Mac Spa Procedimento di azionamento di un abbattitore termico per prodotti alimentari
USD820049S1 (en) 2016-11-22 2018-06-12 Dometic Sweden Ab Cooler
USD995264S1 (en) 2016-11-22 2023-08-15 Dometic Sweden Ab Latch
USD844386S1 (en) 2016-11-22 2019-04-02 Dometic Sweden Ab Cooler
USD985359S1 (en) 2016-11-22 2023-05-09 Dometic Sweden Ab Latch
US11535425B2 (en) 2016-11-22 2022-12-27 Dometic Sweden Ab Cooler
US11414238B2 (en) 2016-11-22 2022-08-16 Dometic Sweden Ab Cooler
USD933449S1 (en) 2016-11-22 2021-10-19 Dometic Sweden Ab Latch
USD907074S1 (en) 2016-11-25 2021-01-05 Dometic Sweden Ab Refrigerating apparatus
USD836994S1 (en) 2017-05-17 2019-01-01 Dometic Sweden Ab Cooler
USD836993S1 (en) 2017-05-17 2019-01-01 Dometic Sweden Ab Cooler
USD888503S1 (en) 2017-05-17 2020-06-30 Dometic Sweden Ab Cooler
USD887788S1 (en) 2017-05-17 2020-06-23 Dometic Sweden Ab Cooler
USD894043S1 (en) 2017-12-14 2020-08-25 Dometic Sweden Ab Zipper pull
USD904830S1 (en) 2017-12-14 2020-12-15 Dometic Sweden Ab Soft bag cooler
RU2787414C2 (ru) * 2018-06-18 2023-01-09 Шнейдер Электрик Эндюстри Сас Способ управления установкой охлаждения, соединенной с электрическим кожухом
IT201800020254A1 (it) * 2018-12-20 2020-06-20 Cold Line Srl Metodo di funzionamento di apparecchiature per l'abbattimento e la surgelazione di prodotti alimentari e di prodotti deperibili, e apparecchiatura per l'abbattimento attuante il metodo
WO2020208188A3 (en) * 2019-04-12 2020-11-19 Société des Produits Nestlé S.A. Optimization of energy utilization in solar powered freezer or cooler system
USD1002676S1 (en) 2019-08-30 2023-10-24 Dometic Sweden Ab Appliance
USD1026969S1 (en) 2020-08-31 2024-05-14 Dometic Sweden Ab Refrigerator
USD1053913S1 (en) 2020-08-31 2024-12-10 Dometic Sweden Ab Refrigerator
CN114294738A (zh) * 2021-12-30 2022-04-08 深圳市鑫嘉恒科技有限公司 一种具有不间断供能作用的户外空调
US12371227B2 (en) 2022-08-12 2025-07-29 Dometic Sweden Ab Cooler

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AU2012359096A1 (en) 2014-07-10
CN104024767A (zh) 2014-09-03
WO2013091914A1 (de) 2013-06-27
CN104024767B (zh) 2016-08-24
EP2795206B1 (de) 2018-01-03
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EP2795206A1 (de) 2014-10-29
DK2795206T3 (da) 2018-01-29

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