EP2522942A1 - Appareil de réfrigération et/ou de congélation - Google Patents

Appareil de réfrigération et/ou de congélation Download PDF

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Publication number
EP2522942A1
EP2522942A1 EP12003562A EP12003562A EP2522942A1 EP 2522942 A1 EP2522942 A1 EP 2522942A1 EP 12003562 A EP12003562 A EP 12003562A EP 12003562 A EP12003562 A EP 12003562A EP 2522942 A1 EP2522942 A1 EP 2522942A1
Authority
EP
European Patent Office
Prior art keywords
fan
speed
temperature
compressor
limit
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Withdrawn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
EP12003562A
Other languages
German (de)
English (en)
Inventor
Didier Dipl.-Ing. Siegel (FH)
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 EP2522942A1 publication Critical patent/EP2522942A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a refrigerator and / or freezer with at least one refrigerated interior space and with at least one fan, which is arranged in the cooled interior or in a communicating with the cooled interior space, and with at least one temperature sensor, which is arranged in that it measures the temperature, preferably the air temperature, at least at one point of the appliance, preferably in the cooled interior or in the space communicating therewith.
  • the air distribution in the cooled interior is made partially or completely by means of at least one fan, which may be arranged for example in or in the region of a cooling air duct of the device.
  • Devices known from the prior art have, for example, a cooling air duct in the rear region of the device, which has an upper inlet opening and a lower outlet opening, wherein the upper inlet opening is in the region of a cooling compartment and the lower outlet opening is arranged in the range of a cold storage compartment.
  • This cooling air duct in which at least at least one evaporator is arranged, takes place partially or completely by means of a fan, which conveys the air into the cooling air duct and in total ensures an air circulation in the compartments to be cooled.
  • the present invention relates, inter alia, also to such devices, but is not limited to these devices and in particular also not to the arrangement of said compartments.
  • said fan is operated at two different speeds, wherein a first speed is selected when the compressor of the refrigerant circuit of the refrigerator and / or freezer and a second speed when not in operation, that is, when the compressor is stopped.
  • the fan speed is therefore independent of the cooling power requirement and only dependent on the operation of the compressor.
  • the speeds mentioned are chosen in known from the prior art devices so that there is always a sufficient air or cooling capacity, especially at higher ambient temperatures and comparatively low setpoints for the temperature or corresponding regulator positions available.
  • the present invention is therefore the object of developing a refrigerator and / or freezer of the type mentioned in such a way that this more energy-efficient and quieter than known from the prior art devices.
  • the device has at least one control or regulating unit, which communicates with the at least one temperature sensor and with the at least one fan and which is designed such that it reduces the speed of the fan when the period in which the cooling power requirement exists is shorter than a predetermined first time period limit.
  • the speed of the fan is reduced. This can be done during an operating cycle of the compressor or the fan or the next time you turn on the compressor or the fan.
  • control or regulating unit is designed such that it increases the speed of the fan when the time period in which the cooling power requirement is greater than a predetermined second time period limit.
  • the first and second timeout limits may be identical or different.
  • a speed increase of the fan additionally requires that the temperature measured by the temperature sensor at the first limit plus a ⁇ value, that is plus a surcharge or more than this sum.
  • the predetermined by the control or regulating unit control or regulating algorithm thus provides in a preferred embodiment that made a speed increase when the chiller request lasts longer than x minutes and the chilled air sensor or other temperature sensor detects a higher temperature than the fan on, ie as the upper temperature limit plus a ⁇ value.
  • a speed reduction occurs when the cooling part requirements take less than xy minutes.
  • the said time periods "x" and "xy” as well as the ⁇ value can be fixed or also variable, for example at the factory or the user can be adjustable.
  • a preferred embodiment of the invention is thus an adaptive fan control, with which it is possible to approach the lowest possible fan speed.
  • fan noise in most cases will not be perceived as disturbing under normal environmental conditions.
  • Another advantage is that the comparatively low fan speed, the duty cycle of the fan is high, which leads to small temperature fluctuations in the device and to a safe defrosting of the evaporator. This in turn has the advantage of low compressor life and low power consumption.
  • the increase and / or the reduction of the rotational speed of the fan takes place stepwise and / or continuously and / or that in the case of a stepwise change in the rotational speed the fan is an increase and / or a reduction in the speed in the form of exactly one stage or in the form of multiple stages.
  • the temperature sensor which is preferably designed asdeteil Kunststoffmaschineler, a temperature which is higher than the Ventilatoreinschaltwert, that is, as the first limit, plus one ⁇ value
  • the temperature measured by the temperature sensor is still higher than the fan switch-on value plus the ⁇ value or corresponds to this sum, it can be provided that a further increase in the speed of the fan either stepwise or continuously.
  • control or regulating unit is designed such that it turns on the fan or leaves on when the temperature measured by the temperature sensor rises above the upper temperature limit or reaches the upper temperature limit.
  • the fan is turned on again.
  • the fan remains switched on when the temperature has not fallen below the lower temperature limit, but is, for example, between the first and the second temperature limit and then again reaches or exceeds the upper temperature limit.
  • control or regulating unit is designed such that it switches off the fan when the temperature measured by the temperature sensor falls below or to a lower temperature limit, the lower temperature limit below the upper Temperature limit is and is preferably provided that the control or regulating unit is designed such that it keeps the fan off until the temperature determined by the temperature sensor reaches or exceeds the upper temperature limit.
  • the device comprises at least one refrigerant circuit with at least one compressor for compressing the refrigerant, wherein the compressor is designed or controlled so that operating times are provided, in which the compressor is in operation, and that Stand times are provided, in which the compressor is not in operation, wherein the control or regulating unit is designed such that the fan is operated at befindlichem compressor in operation at a higher speed than befindlichem not in operation compressor.
  • the adaptive fan control described above which constitutes an advantageous embodiment of the present invention, it is thus conceivable to reduce the fan speed during the compressor service life.
  • the fan is switched on in the period in which cooling power requirement exists and is switched off in the period in which no cooling power requirement exists.
  • the present invention further relates to a method of operating a refrigerator and / or freezer according to any one of claims 1 to 9, wherein the speed of the fan is reduced if the time period in which cooling power demand is shorter than a predetermined first time periods -Limit.
  • the rotational speed of the fan is increased when the time period in which the cooling power requirement exists is greater than a predetermined second time span limit value.
  • the speed of the fan is increased when the period in which the cooling power requirement exists, is greater than a predetermined second time period limit and when the measured temperature is greater than the upper temperature limit, if necessary plus a delta value ,
  • the increase and / or the reduction of the speed of the fan can be done gradually and / or continuously.
  • an increase and / or reduction of the speed can take place in the form of exactly one or more stages.
  • the temperature is measured, which is measured by an air sensor located in the cooled interior of a refrigerator and / or freezer.
  • the abscissa shows the time.
  • FIG. 1 the ordinate shows the fan voltage, which is proportional to the fan speed, and the abscissa the time.
  • FIG. 1 shows that at time T 0, the temperature measured by the temperature sensor is above the switch-on value.
  • the fan is operated at a certain speed, in the present example with a voltage of 8V.
  • T 1 it is determined that the measured temperature is already above the switch-on value for a certain duration and, in addition, the value of the switch-on temperature plus a ⁇ value or exceeds, so that at this time T, the fan voltage is increased by 0.5V and thus an increase in the speed is made.
  • the temperature measured by the temperature sensor reaches the switch-off value AW, that is to say the second limit value, with the result that the fan is switched off.
  • the operating voltage of the fan corresponds to the operating voltage at the beginning of the previous interval, namely 8V.
  • FIG. 1 shows, at the time T 4, the switch-off, that is, the second threshold falls below, which causes the fan at time T 4 is turned off again.
  • next and third illustrated operating interval of the fan is again switched on reaching the switch-on at the time T 5, the fan, but the operating voltage of the fan is less than that of the previous interval. This is due to the fact that in the previous operating interval, that is to say in the second operating interval, the time period T 3 to T 4 is shorter than a specific limit value. In the embodiment shown here, the fan is thus operated in the third operating interval with a voltage of 7.5V.
  • the duration of the cooling part request that is, the time period T 5 to T 6 is less than a limit
  • the fourth Operating interval between the times T 7 and T 8 made a further reduction of the operating voltage of the fan, resulting in a further reduction in the speed of the fan.
  • the low fan speed leads to an increased duty cycle of the fan, but to lower temperature fluctuations in the unit and to a safe defrosting of the evaporator. This in turn leads to low compressor life and low power consumption.
  • On and off values refer to both the fan and the compressor.
  • FIG. 2 shows a further embodiment of the operation of the refrigerator and / or freezer according to the invention, wherein in FIG. 2 above again on the ordinate the temperature of the air sensor and on the abscissa the time is plotted. Underneath is the voltage of the fan on the ordinate and the time on the abscissa. Additionally is in FIG. 2 below with the reference numeral A represents the compressor power.
  • the switch-on of the temperature is reached or exceeded at time T 1 , which means that the fan is set in the embodiment shown here with a voltage of 6.5V in operation.
  • the compressor is turned off, which causes the fan is automatically reset to a lower speed, that is, operated at a lower voltage, which is 6V in the embodiment shown here. If the compressor is switched on again, which is the case at time T 3 , the fan is operated again with the same operating voltage, that is to say at 6.5 V, as in the first preceding operating interval.
  • the temperature measured by the air sensor reaches the first limit value, that is to say the switch-on value, due to the heat input.
  • the fan is still operated at the lower speed or voltage and only raised again to the aforementioned value of 6.5 V when the compressor turns on again. This is the case at time T 7 .
  • FIG. 2 shows the performance of the compressor is continuously reduced during its intervals operating time.
  • FIG. 2 also shows that the speed of the fan or the fan voltage in the service life of the compressor is below that, as it is set in the operating times of the compressor.
  • a crizalgoritmus may be configured such that an increase in speed is present when the cooling part requirement lasts longer than x minutes, that is, when the temperature is greater than x minutes above a switch-on and thedeteillufttressler or another temperature sensor measures a higher temperature than the fan switch-on value plus a ⁇ value.
  • This time span or ⁇ value can represent variable parameters.
  • the time period "x" is formed by the intervals T 6 -T 8 and T 6 -T 9 .
  • cooling part requirements may be shorter than xy minutes, and this period may be variably adjustable.
  • the initial speed or initial voltage (for example 8V) of the fan the minimum speed and the maximum speed of the fan, each with voltage values z. B. of 6V and 10V can be correlated, as well as the speed or voltage steps, which may be in both directions, that is both in the increase and in the reduction, for example, 0.5V.
EP12003562A 2011-05-11 2012-05-07 Appareil de réfrigération et/ou de congélation Withdrawn EP2522942A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011101204 2011-05-11
DE102012007826A DE102012007826A1 (de) 2011-05-11 2012-04-17 Kühl- und/oder Gefriergerät

Publications (1)

Publication Number Publication Date
EP2522942A1 true EP2522942A1 (fr) 2012-11-14

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ID=46146556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12003562A Withdrawn EP2522942A1 (fr) 2011-05-11 2012-05-07 Appareil de réfrigération et/ou de congélation

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EP (1) EP2522942A1 (fr)
DE (1) DE102012007826A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020221183A1 (fr) * 2019-05-02 2020-11-05 海尔智家股份有限公司 Appareil de réfrigération et procédé pour réduire le bruit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6006530A (en) * 1997-05-15 1999-12-28 Samsung Electronics Co., Ltd. Refrigerator driving control apparatus and method thereof
EP1742001A2 (fr) * 2005-07-08 2007-01-10 Liebherr-Hausgeräte Ochsenhausen GmbH Réfrigérateur et/ou congélateur
DE202008000757U1 (de) * 2007-12-28 2009-04-30 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
DE102009000665A1 (de) * 2009-02-06 2010-08-12 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät, insbesondere Haushaltskältegerät, sowie Verfahren zur Regelung eines Kältegeräts

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6006530A (en) * 1997-05-15 1999-12-28 Samsung Electronics Co., Ltd. Refrigerator driving control apparatus and method thereof
EP1742001A2 (fr) * 2005-07-08 2007-01-10 Liebherr-Hausgeräte Ochsenhausen GmbH Réfrigérateur et/ou congélateur
DE202008000757U1 (de) * 2007-12-28 2009-04-30 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
DE102009000665A1 (de) * 2009-02-06 2010-08-12 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät, insbesondere Haushaltskältegerät, sowie Verfahren zur Regelung eines Kältegeräts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020221183A1 (fr) * 2019-05-02 2020-11-05 海尔智家股份有限公司 Appareil de réfrigération et procédé pour réduire le bruit

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Publication number Publication date
DE102012007826A1 (de) 2012-11-15

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