EP1636530B1 - Kältegerät mit gesteuerter entfeuchtung - Google Patents

Kältegerät mit gesteuerter entfeuchtung Download PDF

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Publication number
EP1636530B1
EP1636530B1 EP04739760.9A EP04739760A EP1636530B1 EP 1636530 B1 EP1636530 B1 EP 1636530B1 EP 04739760 A EP04739760 A EP 04739760A EP 1636530 B1 EP1636530 B1 EP 1636530B1
Authority
EP
European Patent Office
Prior art keywords
evaporator
ventilator
refrigeration device
switched
fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP04739760.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1636530A1 (de
Inventor
Helmut Konopa
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete 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 BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP1636530A1 publication Critical patent/EP1636530A1/de
Application granted granted Critical
Publication of EP1636530B1 publication Critical patent/EP1636530B1/de
Anticipated expiration legal-status Critical
Active 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • 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
    • 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
    • F25B2600/11—Fan speed control
    • F25B2600/112—Fan speed control of evaporator fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/02—Humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/041—Treating air flowing to refrigeration compartments by purification
    • F25D2317/0411—Treating air flowing to refrigeration compartments by purification by dehumidification
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/04—Refrigerators with a horizontal mullion
    • 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
    • F25D2700/14—Sensors measuring the temperature outside the refrigerator or freezer

Definitions

  • the present invention relates to a no-frost refrigerator and an operating method for such a device.
  • an evaporator is arranged in a separate chamber from a storage compartment for refrigerated goods, and a heat exchange between the chamber and the storage compartment through which the storage compartment is cooled takes place by using a fan on the evaporator cooled and dried air in the storage compartment blown and relatively warm, humid air from the storage compartment is sucked into the chamber.
  • the storage compartment is not only cooled but also dehumidified. The moisture settles on the evaporator. This dehumidification prevents condensate from settling on storage areas and refrigerated goods in the storage compartment under critical climatic conditions, in particular when the refrigerator is used in a warm environment with high humidity.
  • this advantage can turn into a disadvantage at less critical environmental conditions when stored food is dried out by the intensive dehumidification.
  • the US 2,549,547 discloses a refrigerator according to the preamble of claim 1, wherein an average circulation of a fan in a switched-on phase of the evaporator of the refrigeration device is made variable.
  • the US 2,416,354 discloses a refrigerator with a refrigeration cycle and a coolable by means of the refrigeration cycle interior.
  • cooled air is blown through tubes in the interior.
  • a circulation of the cooled air takes place via a motor-driven fan depending on the humidity in the interior.
  • WO 03/054462 A1 discloses a refrigerator in accordance with Article 54 (3) EPC.
  • the circulation rate of the fan of such a refrigeration appliance By varying the circulation rate of the fan of such a refrigeration appliance, the heat flow occurring between the two at a given temperature difference between the storage compartment of the refrigeration appliance and the evaporator is simultaneously changed. That is, a reduction in the recirculation performance leads to a reduced heat exchange and thus to a greater cooling of the evaporator. This increased cooling causes a more intense drying of passing the evaporator on the air.
  • the reduced circulation efficiency when the evaporator and fan are turned on, causes the cooling of the storage compartment to be slower than at a higher circulation rate, thus prolonging the on-time of the evaporator.
  • This extension compensates for the reduced recirculation capacity and causes more moisture to be trapped during a switch-on phase of the evaporator at low recirculation performance than at high.
  • a variable circulation capacity of the evaporator is realized in that the fan is made temporarily switched off in the switched-on phase of the evaporator.
  • a control circuit for controlling the operation of the evaporator and the fan which is arranged to intermittently operate the fan when the evaporator is switched on and thereby to throttle its mean circulation performance compared to a continuous operation.
  • control circuit is coupled to at least one climate sensor for detecting a climate parameter such as the ambient temperature of the refrigerator, the humidity of the ambient air or the humidity of the air in the interior and set to the duty cycle in dependence on the at least one of such a sensor to control recorded climate parameters.
  • the fan in the on-phase of the evaporator, is adjustable to different non-zero speeds to adjust the average circulation power to the needs.
  • a selector switch may be provided which allows a user, a control circuit of the fan specify a desired speed of the same, or the control circuit may be coupled to at least one air conditioning sensor to automatically control the circulation capacity of the fan based on a detected by this sensor climatic parameter and a predetermined target value of humidity.
  • the estimation is preferably an air humidity measurement made directly in the storage compartment concerned. Then it is possible in particular to take into account influences of the operation of the evaporator and the fan on the humidity in the storage compartment in the selection of the circulation rate. In principle, however, it is also possible to estimate the humidity in the storage compartment on the basis of correlated variables such as temperature and humidity of the environment and to select the circulation rate as a function of the result of the estimation.
  • FIG. 1 is a schematic representation of a combination refrigerator, to which the present invention is implemented.
  • a refrigerated compartment 1 and a freezer compartment 2 form two temperature zones of the refrigerator.
  • a refrigerant circuit comprises a compressor 3, which pumps a compressed refrigerant sequentially through two evaporators 4, 5 of the freezer compartment 2 and the refrigerating compartment 1, and a heat exchanger 6, which passes through the refrigerant in the evaporators 4, 5, before returning to the Compressor 3 enters.
  • the cooling compartment 1 associated evaporator 5 is housed in a separated from the refrigerating compartment 1 by a thermally insulating wall 7 chamber 8.
  • the chamber 8 communicates with the refrigerated compartment 1 via air inlet and - outlets, in one of which a fan 9 is arranged for forced circulation of air between the chamber 8 and the refrigerating compartment 1.
  • a control circuit 10 is connected to a arranged in the cooling compartment temperature sensor 12 and control lines to the compressor 3 and the fan 9 and is capable of the compressor 3_und the fan 9 and indirectly via the compressor 3, the evaporator 4, 5 - a temperature detected by the temperature sensor 12 on or off.
  • the control circuit 10 is further connected to an air humidity sensor 13, which is arranged in the refrigerating compartment 1.
  • At the control circuit 10 may be provided a user operable selector switch 11, which allows to set a target value for the humidity in the refrigerator compartment 1.
  • the humidity sensor 13 in the cooling compartment 1 can be replaced as a variant by a humidity sensor outside the cooling compartment and / or a sensor for the ambient temperature of the refrigerator, since their measurements allow a conclusion on the humidity in the refrigerator compartment 1.
  • FIG. 2 illustrates the operation of the control circuit 10 based on the time profiles of a plurality of operating parameters of the refrigeration device.
  • the curve 3 ' indicates the operating state of the compressor 3. At time t 0 it is off; as soon as the temperature sensor 12 registers the exceeding of an upper limit temperature, at time t 1 , it is switched on until it falls below a lower limit temperature in the cooling compartment 1 until time t 2 . From this time, the cooling compartment 1 is heated again until at t 4, a new switch-on of the compressor 3 begins.
  • the humidity detected in the cooling compartment 1 by the sensor 13 is at a constant, low level.
  • the fan 9 also starts operating at the time t 1 , as represented by a curve 9 '.
  • the temperature of the evaporator 5, represented by a curve 5 ' goes back from a rest value T 0 to a value T 1 .
  • Moisture from the air circulated by the fan 9 settles on the evaporator 5, so that the air humidity 13 'slowly decreases until the time t 2 of switching off the fan 9.
  • the moisture 13 ' rises sharply, for example, because the door of the refrigerator is opened and warm, moist air from the outside penetrates.
  • the control circuit 10 recognizes that a more intensive drying is required and operates the fan 9, when at the time t 4, the compressor 3 is turned on again, intermittently with a duty cycle, which is selected in dependence on the detected at time t 4 humidity. This leads to a lower average Circulating power of the fan 9 as during the time interval t 1 to t 2 , so that the heat exchange between the evaporator 5 and the refrigerating compartment 1 is slowed down.
  • the turn-on time t 4 to t 5 is therefore longer than the time t 1 to t 2 , and the temperature T 2 of the evaporator 5 reached during this period is lower than T 1 .
  • This lower temperature T 2 causes the air flowing past the evaporator 5 to be more effectively dried, and due to the extended duty cycle of the compressor 3, finally, a low humidity value is again achieved.
  • the duty cycle with which the control circuit 10 operates the fan during the switch-on phases of the evaporator is in the simplest case a step function which has a value of 1 for low humidities and a non-zero value for high humidities; it is also possible to use a step function with a multiplicity of values of the duty cycle decreasing with increasing humidity or a continuous function for the control.
  • the control circuit 10 is designed to set different speeds of the fan 9 as a function of a measured air humidity.
  • the operation of this embodiment is in FIG. 3 shown.
  • the humidity is low, in a switch-on phase of the evaporator 4, the fan 9 runs at maximum speed, and the time courses of on and off phases, evaporator temperature and humidity are the same as in the case of FIG. 2 , As a result, the diagram differs FIG. 3 not until the time t 4 of the FIG. 2 , At time t 4 , the control circuit 10 selects a speed of the fan 9, which is smaller than its maximum speed based on the measured at this time high humidity value.
  • the humidity continuously decreases, and accordingly the speed of the fan 9, which selects the control circuit 10 based on the measured humidity, and with increasing circulation capacity of the fan 9, the temperature of the evaporator 5 increases to a large Part of the time interval t 4 to t 5 continuously.
  • FIGS. 2 and 3 In the FIGS. 2 and 3 is shown the case of rapid dehydration, in which a single switch-on phase t 4 to t 5 is sufficient to the humidity in the refrigerator compartment to a Target value.
  • the drying process can also be distributed over several successive switch-on phases.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Air Conditioning Control Device (AREA)
  • Drying Of Solid Materials (AREA)
EP04739760.9A 2003-06-11 2004-06-09 Kältegerät mit gesteuerter entfeuchtung Active EP1636530B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10326329A DE10326329A1 (de) 2003-06-11 2003-06-11 Kältegerät mit gesteuerter Entfeuchtung
PCT/EP2004/006256 WO2004109205A1 (de) 2003-06-11 2004-06-09 Kältegerät mit gesteuerter entfeuchtung

Publications (2)

Publication Number Publication Date
EP1636530A1 EP1636530A1 (de) 2006-03-22
EP1636530B1 true EP1636530B1 (de) 2016-12-07

Family

ID=33482794

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04739760.9A Active EP1636530B1 (de) 2003-06-11 2004-06-09 Kältegerät mit gesteuerter entfeuchtung

Country Status (5)

Country Link
US (1) US20070137227A1 (zh)
EP (1) EP1636530B1 (zh)
CN (2) CN1806155A (zh)
DE (2) DE20321771U1 (zh)
WO (1) WO2004109205A1 (zh)

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CN104567241A (zh) * 2014-11-26 2015-04-29 青岛海尔股份有限公司 干燥储物装置及其换风方法
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Also Published As

Publication number Publication date
DE10326329A1 (de) 2004-12-30
US20070137227A1 (en) 2007-06-21
CN101893363A (zh) 2010-11-24
WO2004109205A1 (de) 2004-12-16
EP1636530A1 (de) 2006-03-22
DE20321771U1 (de) 2009-10-29
CN1806155A (zh) 2006-07-19

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