EP2363665A2 - Appareil de réfrigération et/ou de congélation - Google Patents

Appareil de réfrigération et/ou de congélation Download PDF

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Publication number
EP2363665A2
EP2363665A2 EP11001639A EP11001639A EP2363665A2 EP 2363665 A2 EP2363665 A2 EP 2363665A2 EP 11001639 A EP11001639 A EP 11001639A EP 11001639 A EP11001639 A EP 11001639A EP 2363665 A2 EP2363665 A2 EP 2363665A2
Authority
EP
European Patent Office
Prior art keywords
refrigerant
evaporators
compartment
evaporator
control device
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
EP11001639A
Other languages
German (de)
English (en)
Other versions
EP2363665A3 (fr
EP2363665B1 (fr
Inventor
Lothar R. Oellrich
Karlheinz Schaber
Matthias Schenk
Thomas Ertel
Thomas Gindele
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 EP2363665A2 publication Critical patent/EP2363665A2/fr
Publication of EP2363665A3 publication Critical patent/EP2363665A3/fr
Application granted granted Critical
Publication of EP2363665B1 publication Critical patent/EP2363665B1/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
    • F25B5/02—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
    • 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

Definitions

  • the present invention relates to a refrigerator and / or freezer with at least one refrigerant circuit having two or more than two parallel connected evaporators, which preferably cool different compartments of the refrigerator and / or freezer, and with at least one compressor, by means of which the evaporator can be acted upon with refrigerant are.
  • refrigerators and / or freezers are also known from the state of the art in which, at the same time, a plurality of evaporators connected in parallel is supplied with refrigerant.
  • the evaporators are usually valves, such as check valves or control valves or other components, such as refrigerant collector downstream, which are located in the one or more line sections between evaporator outlet and compressor inlet.
  • valves such as check valves or control valves or other components, such as refrigerant collector downstream, which are located in the one or more line sections between evaporator outlet and compressor inlet.
  • the present invention is therefore the object of developing a refrigerator and / or freezer of the type mentioned in such a way that it has a simple structure.
  • the device comprises at least one movable in a plurality of positions control device, which is arranged in the flow direction of the refrigerant upstream of the evaporator and designed such that it distributes the refrigerant to the evaporator, wherein the laxatives from the evaporators lines of the refrigerant circuit communicate with each other and have no shut-off.
  • the control device serves to distribute the refrigerant coming from the condenser to the evaporator.
  • the refrigerant flow is distributed only to the evaporators by the upstream control means, whereas downstream of the evaporators no such control means is provided.
  • the lines discharging from the evaporators open into at least one common line, i. be merged to at least one common line, which preferably also has no shut-off.
  • this common line forms the suction line of the compressor.
  • Said control means may be constituted by at least one multi-way valve or by individual valves respectively arranged in the lines leading to the evaporators.
  • a conventional stop valve would be possible in each of the individual lines leading to the evaporators.
  • the control device can be designed such that in normal operation of the device in a first working position of the control device, each of the evaporators is individually supplied with refrigerant and / or in a second working position of the control means groups of evaporators are simultaneously supplied with refrigerant and / or in a third working position all evaporators are supplied with refrigerant at the same time.
  • At least one of the compartments is associated with a switch-off, which is the actual temperature of the compartment, in which the refrigerant supply to the evaporator associated with the compartment is suppressed.
  • the device has at least one control or regulating device which is designed such that it increases the switch-off of the compartment, if the actual temperature of the compartment after switching off the evaporator would otherwise fall below the temperature setpoint for this compartment.
  • control or regulation device recognizes that, in the case of parallel operation of at least two evaporators, the evaporator assigned to one compartment is or will be switched off. Then the switch-off value is increased accordingly, so that the re-evaporation of the temperature setpoint in the compartment in question is achieved.
  • comparison means can be provided, which are designed such that they compare the actual temperature value in the compartment in question after switching off the vaporizer associated therewith with a temperature setpoint of the compartment, wherein the control or regulating device is designed such that it increases the switch-off value in Depending on the comparison made by the comparison means makes.
  • the present invention further relates to a method for operating a refrigerator and / or freezer with at least one refrigerant circuit with two or more than two evaporators connected in parallel, which preferably cool different compartments of the refrigerator and / or freezer, and with at least one compressor, the refrigerant to the evaporators promotes, the refrigerant streams are discharged after passing through the evaporator by communicating with each other, which have no shut-off.
  • At least one of the compartments is associated with a switch-off value, which is the temperature actual value of the compartment in which the refrigerant supply is assigned to the compartment assigned to the compartment Evaporator is inhibited, wherein the switch-off of the compartment is increased when the actual temperature falls after switching off the evaporator below the switch-off, to avoid that any re-evaporation of refrigerant reaches a temperature in the compartment, which is below the setpoint.
  • a switch-off value which is the temperature actual value of the compartment in which the refrigerant supply is assigned to the compartment assigned to the compartment Evaporator is inhibited
  • the refrigerator and / or freezer is designed so that a comparatively frequent operation of the compressor takes place.
  • the relative duty cycle of the compressor is> 10%, preferably> 40%, preferably> 60% or preferably> 80%.
  • the relative duty cycle of the compressor is to be understood as the ratio of its operating times and the sum of operating and standstill times.
  • the suction line temperature of a compartment or the suction line temperature falls below a limit, for example 10 ° C. (15 ° C., 0 ° C.) after the merging of the suction lines of the individual compartments Turn on the warmest non-operated compartment for a specified time to increase the suction line temperature. This is done by the increased heat load as a result of connecting another evaporator.
  • a temperature sensor on the suction line measures the corresponding suction line temperature. This value serves as a pulse generator for the device control to effect the above-described evaporator connection.
  • the possibly occurring too low compartment temperature in the switched compartment can be intercepted by a somewhat too warm regulation of individual subjects.
  • the connected compartment remains switched on only until the suction line temperature exceeds the above limit plus a certain Temperature value (eg 5 K or 10K) has heated. Should the addition of a subject not be sufficient, successively another subject will be added.
  • the temperature sensor on the suction line can also be dispensed with and it is possible to control e.g. by a time function (e.g., if Tray 1 is on for 10 minutes, then Tray 2 will be turned on, etc.)
  • a time function e.g., if Tray 1 is on for 10 minutes, then Tray 2 will be turned on, etc.
  • the single figure shows a schematic view of an area of a refrigerant circuit of a refrigerator and / or freezer according to the invention with three evaporators, which can be acted upon at the same time with refrigerant in case of need.
  • the reference numeral 10 denotes the condenser or a line leading from the condenser. By means of the condenser 10 heat is dissipated to the environment.
  • Reference numeral 20 designates a 4-way valve which has the task of guiding the liquefied refrigerant in the liquefier as needed to one or more of the evaporators 30, 40, 50.
  • the valve 20 is designed such that each evaporator 30, 40, 50 can be individually supplied with refrigerant, or that several or all of the evaporators 30 - 50 can be supplied with refrigerant.
  • the valve 20 is designed such that any combinations of the evaporator 30 - 50 can be supplied with refrigerant.
  • the distribution of the refrigerant depends on the refrigeration demand of the compartment (s) to which the evaporators 30-50 are assigned.
  • compartment for example, individual subjects, such as a refrigerator compartment, a freezer or a cold storage compartment, or Parts of such subjects, such as individual drawers, etc. may affect.
  • the term “compartment” also encompasses individual regions or zones of a compartment.
  • valve 20 instead of the valve 20, all other means can be used by means of which the refrigerant in the desired manner to one or more of the evaporator 30 - 50 can be distributed.
  • each evaporator prefferably has an open-close valve or other shut-off means per supply line.
  • each one of the evaporators 30-50 is assigned to exactly one compartment and / or that an evaporator 30-50 is assigned to several compartments and / or that one compartment is cooled by a plurality of evaporators 30-50.
  • shut-off means Downstream of the evaporators 30-50, i. in the section of the refrigerant circuit which in the figure to the right connects to the evaporators 30-50 all the way to the compressor 70, no shut-off means, i. In particular, no valves provided.
  • the discharge lines of the evaporators 30-50, through which the refrigerant is removed from the evaporators, are simply, i. without a valve or the like connected to each other. That the suction pipes of the evaporators communicate with each other. They are merged at the point 60 to a common suction line, which also has no shut-off and leads directly to the compressor 70.
  • the distribution of the refrigerant to the evaporator 30-50 thus takes place exclusively upstream of the evaporator 30-50.
  • the compressor 70 is connected via a line, not shown, with the condenser 10, so that there is a closed refrigerant circuit.
  • shut-off means and / or other components of a refrigerant circuit such as e.g. Collector arranged.
  • a control or regulation recognizes when the evaporator of a compartment or compartment is to be switched off.
  • the switch-off value of this compartment is increased to such an extent that the temperature setpoint in the compartment is reached even with the said post-evaporation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP11001639.1A 2010-03-01 2011-02-28 Appareil de réfrigération et/ou de congélation Active EP2363665B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010009710 2010-03-01
DE102010018543A DE102010018543A1 (de) 2010-03-01 2010-04-28 Kühl- und/oder Gefriergerät

Publications (3)

Publication Number Publication Date
EP2363665A2 true EP2363665A2 (fr) 2011-09-07
EP2363665A3 EP2363665A3 (fr) 2015-04-29
EP2363665B1 EP2363665B1 (fr) 2019-08-28

Family

ID=44123301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11001639.1A Active EP2363665B1 (fr) 2010-03-01 2011-02-28 Appareil de réfrigération et/ou de congélation

Country Status (2)

Country Link
EP (1) EP2363665B1 (fr)
DE (1) DE102010018543A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4100749A1 (de) * 1991-01-12 1992-07-16 Danfoss As Regeleinrichtung fuer eine kuehlanlage
DE19547744A1 (de) * 1995-12-20 1997-06-26 Bosch Siemens Hausgeraete Kältegerät
DE10260350B4 (de) * 2002-07-04 2015-11-26 Lg Electronics Inc. Verfahren zur Steuerung eines Betriebs eines mit zwei Verdampfern ausgebildeten Kühlsystems
JP2006177632A (ja) * 2004-12-24 2006-07-06 Denso Corp 冷凍サイクル
KR100800591B1 (ko) * 2007-03-29 2008-02-04 엘지전자 주식회사 냉장고의 제어 방법
JP5210626B2 (ja) * 2007-12-27 2013-06-12 三菱重工業株式会社 陸上輸送用冷凍装置及び陸上輸送用冷凍装置の運転制御方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
EP2363665A3 (fr) 2015-04-29
EP2363665B1 (fr) 2019-08-28
DE102010018543A1 (de) 2011-09-01

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