EP1722177A2 - Appareil de réfrigération et/ou de congélation ainsi que méthode de commande de celui-ci - Google Patents

Appareil de réfrigération et/ou de congélation ainsi que méthode de commande de celui-ci Download PDF

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Publication number
EP1722177A2
EP1722177A2 EP06009670A EP06009670A EP1722177A2 EP 1722177 A2 EP1722177 A2 EP 1722177A2 EP 06009670 A EP06009670 A EP 06009670A EP 06009670 A EP06009670 A EP 06009670A EP 1722177 A2 EP1722177 A2 EP 1722177A2
Authority
EP
European Patent Office
Prior art keywords
freezer
refrigerator
capillary tube
evaporator
temperature
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.)
Withdrawn
Application number
EP06009670A
Other languages
German (de)
English (en)
Inventor
Matthias Wiest
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.)
Liebherr Hausgeraete Ochsenhausen GmbH
Original Assignee
Liebherr Hausgeraete Ochsenhausen 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
Application filed by Liebherr Hausgeraete Ochsenhausen GmbH filed Critical Liebherr Hausgeraete Ochsenhausen GmbH
Publication of EP1722177A2 publication Critical patent/EP1722177A2/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing 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
    • 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
    • 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
    • F25B2400/01—Heaters
    • 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
    • F25B2600/2513—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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/10—Sensors measuring the temperature of 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
    • 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
    • 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
    • F25D2700/122—Sensors measuring the inside temperature of freezer compartments
    • 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
    • F25D2700/14—Sensors measuring the temperature outside the refrigerator or freezer

Definitions

  • the present invention relates to a refrigerator and / or freezer with a refrigerant circuit having a compressor, a condenser, at least one capillary tube and at least one evaporator, and a control device for controlling the refrigerant flow through the refrigerant circuit.
  • the invention further relates to a method for controlling such a refrigerator and / or freezer, wherein detects at least one operating and / or environmental parameters of the refrigerator and / or freezer and depending on the detected operating and / or environmental parameters of the refrigerant flow through the Refrigerant circuit is controlled.
  • valves such as mono- or bistable solenoid valves
  • thermostatic valves or motorized valves are regularly used.
  • the shows DE 36 01 817 A1 a control device for the refrigerant flow to the evaporator of such a refrigerant circuit having an actuatable by an electric servomotor expansion valve.
  • the DE 33 24 590 C2 shows an electromagnetic switching valve, by means of which the refrigerant flow can be selectively directed to a freezer compartment evaporator or a refrigerator compartment evaporator of a refrigerator and / or freezer.
  • the problem with such valves for controlling the flow of refrigerant is on the one hand the moving valve body.
  • valves result in relatively high component costs.
  • the present invention seeks to remedy this situation. It is an object of the invention to provide an improved refrigerator and / or freezer and an improved method for controlling such a refrigerator and / or freezer, avoid the disadvantages of the prior art and further develop the latter in an advantageous manner. Preferably should be achieved with simple means improved control of the refrigerant flow with reduced risk of leakage, which operates noise-free.
  • this object is achieved by a refrigerator and / or freezer according to claim 1.
  • the object is achieved by a method according to claim 16.
  • Preferred embodiments of the invention are the subject of the dependent claims.
  • the invention it is therefore proposed to control the flow of refrigerant by heating the capillary tube by means of a heating device and thereby to bring the refrigerant flowing through the capillary tube to evaporate.
  • the invention is based on the recognition that steam generated in the capillary tube can significantly reduce the flow of the refrigerant through the capillary tube or, if appropriate, completely prevent it. The stronger the evaporation produced in the capillary tube, the lower the remaining refrigerant flow through the capillary tube.
  • the control of the refrigerant flow can completely dispense with flow control and switching valves.
  • the control of the refrigerant flow can be accomplished solely by the heating of the capillary tube or more capillary tubes and the evaporation of the refrigerant therein. This eliminates additional joints in the refrigerant circuit, as would be required for the installation of valves. Accordingly, the risk of leakage can be reduced. In addition, the switching noises normally arising in valves are eliminated.
  • the control of the refrigerant flow can be carried out completely noise-free. In addition, lower costs can be achieved compared to a valve solution because the heater is significantly cheaper compared to the relatively expensive valves.
  • control of the refrigerant flow can also be done by a combination of flow control and switching valves on the one hand and the heating of the capillary tube or more capillary tubes on the other. This can possibly achieve a greater variability of control options.
  • control valves has significant advantages in terms of cost, the risk of leakage and noise.
  • the heating device is arranged at the downstream end portion of the respective capillary tube. If the capillary tube is heated at its end immediately before the injection point, a particularly efficient control of the refrigerant flow can be achieved.
  • the heating device is arranged at the upstream end portion of the respective capillary tube. Surprisingly, the refrigerant flow can be controlled extremely precisely by heating the inlet section of the capillary tube.
  • the heater itself can basically be designed differently. According to an advantageous embodiment of the invention, a resistance heating with relatively small power can be used, which sits on the respective capillary tube.
  • the heating power introduced into the capillary tube and / or the temperature of the capillary tube can be changed at least in several stages, in particular continuously.
  • a continuous control of the refrigerant flow through the refrigerant circuit is optionally achievable. If the capillary tube is heated only slightly beyond the point at which steam is formed, a remaining flow of refrigerant can still pass through the capillary tube. If, on the other hand, the capillary tube is heated more and more and accordingly the formation of steam is increasingly intensified, less and less refrigerant can pass through the capillary tube.
  • the heating device is designed to be infinitely temperature controllable for this purpose and controlled accordingly by the control device, which may have a temperature controller or control module for this purpose. Alternatively or additionally, it may also be provided to change the length of the heated capillary tube section, for example, by connecting additional heating elements and thereby to influence the formation of steam.
  • the heating power of the heating device can be controlled as a function of various operating parameters of the refrigerator and / or freezer.
  • an evaporator temperature, a refrigerator compartment temperature, a freezer compartment temperature and / or the ambient temperature of the refrigerator and / or freezer is detected by means of at least one temperature sensor.
  • the control device controls the heating device as a function of the detected temperature in order to control the refrigerant flow accordingly.
  • the duty cycle of the compressor of the refrigerant circuit can be detected as an operating parameter and the heating device can be controlled as a function of the detected duty cycle.
  • the device may have a freezer compartment evaporator and a refrigerated compartment evaporator, which are advantageously connected in series such that the refrigerant first circulates through the freezer compartment evaporator and then flows through the refrigerated compartment evaporator.
  • the cooling circuit can also be configured such that the refrigerant first the cooling part evaporator and then flows through the freezer compartment evaporator.
  • two separate capillary tubes and respective associated heating devices are provided.
  • the two capillary tubes are connected in parallel to each other.
  • the amount of refrigerant flowing into the cooling part evaporator can be controlled in a suitable manner to achieve the desired temperature of the cooling part.
  • the effluent from the refrigerator evaporator refrigerant is then fed directly into the Gefiertsteilverdampfer.
  • a refrigerator and / or freezer 1 is drawn, the device body 2 is closed by a continuous door 3.
  • the interior of the device body 2 is divided into a freezer compartment 4 and a cooling compartment 5, wherein in the illustrated embodiment, the freezer compartment 4 is closed by an inner door 6.
  • storage shelves 7 and a drawer-like vegetable extract 8 are arranged in a conventional manner.
  • the freezer compartment 4 is cooled by a freezer compartment evaporator 9, which can enclose the freezer compartment 4 on five sides.
  • the refrigerating compartment 5 is cooled by a refrigerating compartment evaporator 10, which extends on the rear wall of the refrigerating compartment 5.
  • the freezer compartment evaporator 9 and the refrigerated compartment evaporator 10 are part of a refrigerant circuit 11, which moreover comprises a compressor 12, a condenser 13 and upstream of the two evaporators 9 and 10 a capillary tube 14.
  • the freezer compartment evaporator 9 is arranged upstream of the refrigerating compartment evaporator 10.
  • the two evaporators 9 and 10 are connected in series one behind the other, so that the refrigerant flowing out of the freezer evaporator 9 is conducted into the refrigerated part evaporator 10. Only upstream of the upstream Gefrierteilverdampfers 9, a capillary tube 14 is provided.
  • the capillary tube 14 is provided with a heater 16, the heating elements of each of which can heat the downstream end portion of the respective capillary tube 14 and 15.
  • the heater 16 may advantageously also be arranged at the upstream end of the capillary tube, whereby a very precise control of the refrigerant passage can be achieved.
  • the heating device 16 may be a simple resistance heating element and is advantageously infinitely variable in temperature.
  • the heating device 16 can be controlled by a temperature control module of an electronic control device 18, which controls the operation of the compressor 12, moreover.
  • the refrigerant coming from the condenser initially flows into the capillary tube 14 arranged in front of the freezer compartment evaporator 9. If this is not heated, the refrigerant flows in the usual manner into the freezer compartment evaporator 9. The refrigerant exiting from the freezer compartment evaporator 9 then flows to the refrigerated compartment evaporator 10. If, however, the freezer compartment 9 upstream capillary tube 14 is heated by the heater 16 and generates steam in the capillary tube 14, the refrigerant passage through the capillary tube 14 is optionally reduced to zero. As a result, undercooling of the cooling part can be prevented.
  • the amount of refrigerant is correspondingly reduced by heating the capillary tube 14, the remaining amount of refrigerant entering the freezer evaporator 9 is vaporized there and applied, so to speak, so that further cooling of the refrigerated part evaporator 10 is prevented or correspondingly reduced.
  • the control device 18 may be connected to a plurality of temperature sensors 21 and 22, which measure the refrigerator compartment evaporator temperature or the refrigerator compartment temperature and / or the ambient temperature. Depending on the detected temperatures, the control device 18 controls the heating device 16 and the compressor 12.
  • the control device 18 for controlling the heating device 16 and thus the control of the refrigerant inlet in the Gefrierteilverdampfer 9 next to thedeteilverdampfer- or cooling compartment temperature, which is detected by the temperature sensor 21, only consider a further operating or environmental size. This may be the ambient temperature, which, as shown in Fig. 2, can be detected with an ambient temperature sensor 22. Alternatively or additionally, however, the freezer compartment evaporator or freezer compartment temperature can also be used as the second operating variable. In this case, the controller 18 would include a corresponding freezer temperature sensor. Alternatively or additionally, however, it would also be possible to control the heating device 16 as a function of the relative duty cycle of the compressor 12.
  • the refrigerant circuit 11 also includes the refrigerated compartment evaporators 10 and freezer evaporators 9, which are connected in series with one another, but in this embodiment the refrigerating compartment evaporator 10 is arranged upstream of the freezer evaporator 9.
  • the refrigerant circuit 11 also includes a compressor 12 and a condenser 13.
  • two capillary tubes 14 and 15 and heaters 16 and 17 associated therewith are used to control the flow of refrigerant through the two evaporators 9 and 10 in this embodiment.
  • the first capillary tube 14 is connected directly upstream of the refrigerating compartment evaporator 10. Upstream of said capillary tube 14, the refrigerant line branches.
  • a bypass line running around the refrigerating compartment evaporator 10 branches off and leads to the parallel-connected capillary tube 15, to which the second heating device 17 is assigned.
  • the capillary tube 15 opens into the freezer compartment evaporator 9, as shown in FIG. 3.
  • the two heaters 16 and 17 are also controlled by the control device 18 here. This is connected to temperature sensors 20 and 21, by means of which the temperatures in the refrigerator compartment and freezer or the refrigerator compartment and freezer compartment evaporator are detected.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP06009670A 2005-05-11 2006-05-10 Appareil de réfrigération et/ou de congélation ainsi que méthode de commande de celui-ci Withdrawn EP1722177A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202005007488 2005-05-11
DE102005045585A DE102005045585A1 (de) 2005-05-11 2005-09-23 Kühl- und/oder Gefriergerät sowie Verfahren zur Steuerung desselben

Publications (1)

Publication Number Publication Date
EP1722177A2 true EP1722177A2 (fr) 2006-11-15

Family

ID=36940023

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06009670A Withdrawn EP1722177A2 (fr) 2005-05-11 2006-05-10 Appareil de réfrigération et/ou de congélation ainsi que méthode de commande de celui-ci

Country Status (7)

Country Link
US (1) US20060266077A1 (fr)
EP (1) EP1722177A2 (fr)
KR (1) KR100769750B1 (fr)
CN (1) CN1865817B (fr)
CA (1) CA2546030A1 (fr)
DE (1) DE102005045585A1 (fr)
RU (1) RU2006115867A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119808A1 (fr) * 2007-04-02 2008-10-09 Arcelik Anonim Sirketi Dispositif de refroidissement

Families Citing this family (7)

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DE202007017691U1 (de) * 2007-10-08 2009-02-26 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
DE102008042909A1 (de) * 2008-10-16 2010-04-22 BSH Bosch und Siemens Hausgeräte GmbH Kühl- und/oder Gefriergerät sowie Verfahren zur Regelung eines solchen Kühl- und/oder Gefriergerätes
KR200482028Y1 (ko) * 2012-06-07 2016-12-07 주식회사 대유위니아 냉장고
US9445918B1 (en) 2012-10-22 2016-09-20 Nuvasive, Inc. Expandable spinal fusion implants and related instruments and methods
KR20140115837A (ko) * 2013-03-22 2014-10-01 엘지전자 주식회사 냉장고
US9441866B2 (en) 2013-09-04 2016-09-13 Whirlpool Corporation Variable expansion device with thermal choking for a refrigeration system
CN105579789B (zh) * 2013-09-27 2017-03-01 松下健康医疗控股株式会社 冷冻装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119808A1 (fr) * 2007-04-02 2008-10-09 Arcelik Anonim Sirketi Dispositif de refroidissement

Also Published As

Publication number Publication date
CA2546030A1 (fr) 2006-11-11
CN1865817A (zh) 2006-11-22
RU2006115867A (ru) 2007-11-27
DE102005045585A1 (de) 2006-11-16
CN1865817B (zh) 2011-04-20
US20060266077A1 (en) 2006-11-30
KR100769750B1 (ko) 2007-10-23
KR20060116749A (ko) 2006-11-15

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