EP3608607A1 - Appareil frigorifique doté d'au moins deux évaporateurs - Google Patents

Appareil frigorifique doté d'au moins deux évaporateurs Download PDF

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Publication number
EP3608607A1
EP3608607A1 EP19180698.3A EP19180698A EP3608607A1 EP 3608607 A1 EP3608607 A1 EP 3608607A1 EP 19180698 A EP19180698 A EP 19180698A EP 3608607 A1 EP3608607 A1 EP 3608607A1
Authority
EP
European Patent Office
Prior art keywords
capillary
refrigerant
evaporator
cooling device
connecting line
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.)
Granted
Application number
EP19180698.3A
Other languages
German (de)
English (en)
Other versions
EP3608607B1 (fr
Inventor
Emanuele Diana
Christian Schropp
Adrian Bachmann
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.)
V-Zug AG
Original Assignee
V-Zug AG
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
Application filed by V-Zug AG filed Critical V-Zug AG
Priority to SI201930356T priority Critical patent/SI3608607T1/sl
Publication of EP3608607A1 publication Critical patent/EP3608607A1/fr
Application granted granted Critical
Publication of EP3608607B1 publication Critical patent/EP3608607B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
    • 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
    • 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
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • F25B2341/062—Capillary expansion 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
    • 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
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0409—Refrigeration circuit bypassing means for the evaporator
    • 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
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0411—Refrigeration circuit bypassing means for the expansion valve or capillary tube
    • 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
    • F25B2600/2501—Bypass 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2511—Evaporator distribution 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/37—Capillary tubes

Definitions

  • the invention relates to a cooling device with two useful spaces and a heat pump with at least two evaporators according to the preamble of claim 1.
  • the invention also relates to a method for operating such a cooling device.
  • Cooling devices are known whose heat pump has several evaporators, see for example EP 2722620 .
  • the use of multiple evaporators allows more targeted and efficient cooling of different sections of a usable space or of several separate usable spaces.
  • a changeover valve is then required, which increases the construction effort.
  • the object is to provide a simply constructed cooling device of the type mentioned above.
  • the flow can be adjusted in a simple manner with the valve arrangement either through both evaporators or through only the second evaporator.
  • the second capillary advantageously has a flow resistance for the refrigerant that differs from the first capillary.
  • a desired different flow resistance i.e. a difference that not only corresponds to random component scatter.
  • the difference is at least 10%, in particular at least 20%.
  • capillaries with different flow resistances allows the heat pump to be better adapted to different requirements regarding temperature and cooling capacity of the two evaporators.
  • the second capillary has a lower flow resistance for the refrigerant than the first capillary. This allows the second evaporator to be optimized for higher temperatures than the first evaporator. In other words, the first one Capillary has a greater flow resistance for the refrigerant than the second capillary.
  • first evaporator This allows the first evaporator to be optimized for lower temperatures in the usable space than the second evaporator.
  • first capillary With the first capillary it is also possible to cool the useful rooms one after the other and to use the entire cooling capacity with greater efficiency.
  • the two capillaries are coupled to a heat exchanger with the return line, which leads the refrigerant from the second evaporator back to the compressor. In this way, the efficiency of the device can be improved.
  • the two capillaries and the heat exchanger can be arranged at least partially in an intermediate space between the first and the second useful space.
  • the connecting line can have a section inclined to the horizontal direction.
  • the angle between the horizontal direction and the connecting line is advantageously at least 5 °, in particular at least 10 °.
  • This section descends towards the second evaporator.
  • the second capillary advantageously opens into the inclined section. This prevents a return flow from the second capillary into the first evaporator, or at least makes it difficult without a special check valve being necessary.
  • the second capillary advantageously opens laterally into the connecting line. This is to be understood in such a way that in a section perpendicular to the longitudinal direction of the connecting line, in the region of the mouth of the second capillary into the connecting line, the connecting line neither opens into the connecting line at the highest or lowest point of the cross-section of the connecting line. On the one hand, this makes a free fall of liquid refrigerant unlikely, and on the other hand, the incoming refrigerant does not swirl that is already on the floor liquid medium on the connecting line. This reduces unwanted noise.
  • the cooling device is advantageously a refrigerator and / or a freezer, in particular a household device. However, it can also be a refrigerator for other applications, e.g. a cooling device for medication or other refrigerated goods.
  • the invention also relates to a method for operating the cooling device.
  • a lower temperature is maintained in the first usable room than in the second usable room.
  • the ratio of the refrigerant feet through the first and the second capillary is also varied. In this way, a needs-based and efficient cooling of the two evaporators is possible.
  • Fig. 1 shows a cooling device in the form of a refrigerator with a housing 1 and with two useful spaces 2a, 2b.
  • the first useful space 2a forms a freezer compartment and the second useful space 2b forms a refrigerator compartment.
  • the device can e.g. be designed to maintain a temperature greater than 0 ° C. and less than 10 ° C. in the refrigerator compartment and a temperature less than 0 ° C. in the freezer compartment, in particular between -25 ° C. to -15 ° C.
  • a temperature greater than 0 ° C. and less than 10 ° C. in the refrigerator compartment and a temperature less than 0 ° C. in the freezer compartment, in particular between -25 ° C. to -15 ° C.
  • other temperature ranges are conceivable and are mentioned in the form of additional examples below.
  • two separate doors 4a, 4b are provided for the two utility rooms 2a, 2b, but the use of a common door is also conceivable.
  • the two utility rooms 2a, 2b are advantageously arranged vertically one above the other.
  • An insulator made of an insulation material is advantageously arranged between the first and the second useful space in order to keep the heat transfer between the two useful spaces low.
  • Fig. 2 schematically shows a possible configuration of the components of the device.
  • the device For cooling, the device has a heat pump comprising a compressor 6, a refrigerant condenser 7, a first evaporator 8a and a second evaporator 8b.
  • the first evaporator 8a is provided for cooling the first useful space 2a and the second evaporator 8b for cooling the second useful space 2b.
  • the evaporators 8a, 8b are arranged on a wall of the respective useful space 2a, 2b, and / or ventilation is provided which exchanges the air in a circuit between the respective evaporator 8a, 8b and the useful space 2a, 2b assigned to it.
  • the heat pump further comprises a valve arrangement 10.
  • a first capillary 12a leads from the valve arrangement 10 to the inlet of the first evaporator 8a.
  • a connecting line 14 leads from the first evaporator 8a to the second evaporator 8b.
  • a second capillary 12b leads from the valve arrangement 10 to the inlet of the second evaporator 8b.
  • a return line 16 is also provided, via which the refrigerant is conducted back from the second evaporator 8b to the compressor 6.
  • the valve arrangement 10 is designed to selectively send the refrigerant through one of the capillaries 12a, 12b.
  • valve assembly 10 can be configured to send the refrigerant either through the first capillary 12a or the second capillary 12b. It is also conceivable that the refrigerant 10 a stepless or at least three-stage switching of the flow between the capillaries 12a, 12b allowed.
  • the valve arrangement 10 is controlled by a controller 18.
  • a heat exchanger 20 is provided, which thermally couples the return line 16 to the capillaries 12a, 12b, in order to improve the efficiency of the heat pump.
  • a heat exchanger is to be understood as a thermal bridge between the capillaries and the return line, in particular a metallic thermal bridge.
  • the heat exchanger advantageously extends over at least 10% of the length of the first and / or second capillary.
  • At least a part of the heat exchanger 20 and the capillaries are arranged in the intermediate space 22 between the two useful spaces 2a, 2b in order to use the space there.
  • the capillaries can be rolled up there or laid in a meandering shape.
  • the components of the heat pump are advantageously dimensioned such that if the valve arrangement guides the refrigerant exclusively through the first capillary 12a, a temperature below 0 ° C., in particular between -25 ° C. and -15 ° C., in the first useful space when the doors are closed , and a temperature in the second usable space 2b above 0 ° C, in particular between 0 ° C and 10 ° C, all this at a nominal ambient temperature of, for example 20 ° C.
  • the temperature in the first useful space 2a is in its (first) target range
  • at least part of the evaporation takes place in the second evaporator 8b, specifically to such an extent that the temperature in its (second, higher) target range is set in the second usable space.
  • the average delivery capacity of the compressor 6 can be increased. This leads to increased evaporation and rapid cooling (since the temperature in the first useful space 2a is too high).
  • the cooling capacity in the second useful space 2b does not necessarily change very much as a result.
  • the compressor can in principle also be operated with increased output.
  • the first useful space 2a is cooled further.
  • the valve arrangement is therefore advantageously switched temporarily so that all or part of the refrigerant flows through the second capillary 12b and is thus fed directly to the second evaporator 8b in order to evaporate there.
  • the cooling capacity in the second evaporator 8b or in the second useful space 2b can be increased without the operation of the first useful space 2a or evaporator 8a being strongly influenced.
  • the controller 18 can therefore be designed to increase the flow of refrigerant through the second capillary 12b by controlling the valve arrangement 10 and at the same time to reduce that through the first capillary 12a. In a simple variant, it can e.g. to completely switch the flow from the first to the second capillary.
  • the flow through the first capillary can be completely or largely suppressed if no cooling or only slight cooling is desired in the first useful space 2a or in the first evaporator 8a.
  • the first useful space 2a is used as a cooling compartment (temperature 0 ° C. to 10 ° C.), as a cold storage compartment (temperature -2 ° to 3 ° C., in particular 0 ° C. to 3 ° C.) and / or as Basement compartment (temperature 10 ° C to 16 ° C) should be used.
  • the valve arrangement 10 advantageously has a closed state in which the flow of the refrigerant to all capillaries 8a, 8b is blocked. If the heat pump is now to be switched off temporarily, e.g. because the temperature in the utility rooms is too low, the control brings the valve arrangement 10 into the closed state. This maintains the high pressure in the refrigerant condenser 7. This allows the heat pump to be put back into operation quickly.
  • the flow resistance of the second capillary 12b is advantageously lower than that of the first capillary 12a, so that if the second capillary 12b is used exclusively or predominantly If, with the same compressor operation, a higher temperature is set in the second evaporator 8b than the temperature in the first evaporator 8a if the first capillary 12a is used exclusively or predominantly.
  • the capillaries are advantageously dimensioned such that the temperature of the medium at the outlet of the second capillary is relatively low, advantageously lower than -15 ° C., so that the risk that medium flowing through the second capillary 12b evaporates and then in the Condensed area of the first evaporator 8a.
  • 3 to 5 show a possible configuration of the second capillary 12b in the area where it opens into the connecting line 14.
  • the connecting line 14 has an inclined section 23, which drops towards the second evaporator 8b and in which the (liquid) refrigerant gravitates to the second evaporator 8b runs.
  • the second capillary opens into this inclined section 23.
  • the connecting line 14 is formed by two overlapping pipes 14a, 14b.
  • the second capillary 12b runs between these two tubes 14a, 14b into the interior of the connecting line 14.
  • the second capillary 12b advantageously has an end section 26, which runs inside the connecting line 14 and parallel to its longitudinal axis, so that medium escaping through the mouth 24 of the second capillary 12b is conveyed in the direction of flow of the connecting line 14 and runs in as quietly as possible.
  • the connecting line 14 advantageously has a round cross section in the region of the mouth 24, since this also promotes the noiseless inflow of the liquid medium.
  • the second capillary 12b opens laterally into the connecting line 14. For the reasons already explained above, this in turn promotes low-noise operation.
  • the second capillary 12b opens approximately halfway into the connecting line 14, i.e. in the middle between the highest point 30a and the lowest point 30b of the cross-section of the connecting line 14.
  • center is to be understood here in particular that the mouth (in the vertical direction) is within +/- 20% (relative to the height H of the cross-section) is arranged from the center M.
  • More than two capillaries can also be provided, the flow of which can be controlled by the valve arrangement 10.
  • Fig. 6 shows a device with a third capillary 12c, which from the valve assembly 10 to the first Evaporator 8a runs. It advantageously has a different flow resistance than the first capillary 12a.
  • the controller 18 can use the first, the third or both capillaries 12a, 12c to supply refrigerant to the first evaporator 8a.
  • an additional capillary can also be provided between the valve arrangement 10 and the second evaporator 8b (or the connecting line 14) if greatly different target temperatures are to be achieved in the second evaporator 8b.
  • the device can also have only one utility room with different temperature zones.
  • the two evaporators 2a, 2b are assigned to the different temperature zones.

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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)
EP19180698.3A 2018-07-18 2019-06-17 Appareil frigorifique doté d'au moins deux évaporateurs Active EP3608607B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201930356T SI3608607T1 (sl) 2018-07-18 2019-06-17 Hladilna naprava z vsaj dvema uparjalnikoma

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00889/18A CH713693A2 (de) 2018-07-18 2018-07-18 Kühlgerät mit mindestens zwei Verdampfern.

Publications (2)

Publication Number Publication Date
EP3608607A1 true EP3608607A1 (fr) 2020-02-12
EP3608607B1 EP3608607B1 (fr) 2022-08-24

Family

ID=63761220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19180698.3A Active EP3608607B1 (fr) 2018-07-18 2019-06-17 Appareil frigorifique doté d'au moins deux évaporateurs

Country Status (3)

Country Link
EP (1) EP3608607B1 (fr)
CH (1) CH713693A2 (fr)
SI (1) SI3608607T1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114165964A (zh) * 2020-08-21 2022-03-11 苏州三星电子有限公司 串并联冰箱及其管路组件

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111397272A (zh) * 2020-03-03 2020-07-10 青岛海尔电冰箱有限公司 双系统冰箱

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1394481A2 (fr) * 2002-08-31 2004-03-03 Samsung Electronics Co., Ltd. Réfrigérateur
EP2397797A1 (fr) * 2009-02-12 2011-12-21 Panasonic Corporation Réfrigérateur
EP2722620A2 (fr) 2012-10-22 2014-04-23 Whirlpool Corporation Dégivrage pour évaporateur à faible énergie
DE102015207838A1 (de) * 2015-02-04 2016-08-04 BSH Hausgeräte GmbH Kombinationskältegerät und Betriebsverfahren dafür

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1394481A2 (fr) * 2002-08-31 2004-03-03 Samsung Electronics Co., Ltd. Réfrigérateur
EP2397797A1 (fr) * 2009-02-12 2011-12-21 Panasonic Corporation Réfrigérateur
EP2722620A2 (fr) 2012-10-22 2014-04-23 Whirlpool Corporation Dégivrage pour évaporateur à faible énergie
DE102015207838A1 (de) * 2015-02-04 2016-08-04 BSH Hausgeräte GmbH Kombinationskältegerät und Betriebsverfahren dafür

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114165964A (zh) * 2020-08-21 2022-03-11 苏州三星电子有限公司 串并联冰箱及其管路组件

Also Published As

Publication number Publication date
CH713693A2 (de) 2018-10-15
SI3608607T1 (sl) 2022-11-30
EP3608607B1 (fr) 2022-08-24

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