EP2379966A2 - Appareil de réfrigération et procédé de régulation de la température et de prévention du givrage dans un appareil de réfrigération - Google Patents

Appareil de réfrigération et procédé de régulation de la température et de prévention du givrage dans un appareil de réfrigération

Info

Publication number
EP2379966A2
EP2379966A2 EP09799562A EP09799562A EP2379966A2 EP 2379966 A2 EP2379966 A2 EP 2379966A2 EP 09799562 A EP09799562 A EP 09799562A EP 09799562 A EP09799562 A EP 09799562A EP 2379966 A2 EP2379966 A2 EP 2379966A2
Authority
EP
European Patent Office
Prior art keywords
heating element
cold air
cooling
appliance according
signal
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Withdrawn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
EP09799562A
Other languages
German (de)
English (en)
Inventor
Panagiotis Fotiadis
Jochen HÄRLEN
Harald Joksch
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 Bosch und Siemens 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 Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2379966A2 publication Critical patent/EP2379966A2/fr
Withdrawn legal-status Critical Current

Links

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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04—Preventing the formation of frost or condensate
    • 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
    • F25D17/042—Air treating means within refrigerated spaces
    • F25D17/045—Air flow control arrangements
    • 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
    • F25D2400/02—Refrigerators including a heater
    • 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
    • F25D2600/00—Control issues
    • F25D2600/02—Timing
    • 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
    • F25D2700/02—Sensors detecting door opening
    • 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 invention relates to a refrigerator according to the preamble of claim 1 and a method for controlling a temperature in a working space of a refrigerator according to the preamble of claim 1.
  • no-frost devices In so-called no-frost devices, a cold air flow is supplied to the working space. When supplying the cold air flow resulting in the working space condensation surfaces with reduced surface temperatures at which it can lead to condensation and / or ice formation. In order to avoid such condensate and / or ice formation, defrost heaters may be provided in the utility room.
  • the object of the invention is to provide a cooling device and a method for controlling the temperature in a refrigeration device, with which the energy consumption of the refrigeration device can be reduced.
  • the heating element is associated with a timer, with which the heating element remains out of operation after the generation of the cooling signal for a predetermined time interval.
  • the timer thus delays by the predetermined time interval forwarding the cooling signal to the heating element. In this way, signaling technology and control technology simply achieved a delayed switching on of the heating element after generation of the cooling signal.
  • the invention makes use of the fact that not immediately after the generation of a cooling signal, or the associated beginning of the cold air flow, a condensate / ice formation takes place on Nutzraum lake. Rather, only after a certain Einströmzeitdauer the cold air flow cold usable space condensation surfaces from which condensate can precipitate.
  • the heating element is switched on only after expiration of such a cooling interval.
  • the time interval predetermined by means of the timer corresponds approximately to the abovementioned cooling interval, which can be established empirically by trial and error. Temperature sensors for measuring a surface temperature at condensation surfaces within the useful space can be avoided.
  • the heating element After expiration of the time interval predetermined by the timer, the heating element can be activated, provided that the cooling signal is still present. Is the cooling signal after expiration the time interval is no longer available, the heating element can remain inoperative.
  • the following constellation results Due to the low ambient temperatures there is a low cooling requirement in the work space.
  • the time intervals in which the control device generates the cooling signal are correspondingly short. The signal interval can therefore end before the expiration of the time interval specified by the timer, so that the heating element remains switched off.
  • the cooling signal duration may be extended accordingly.
  • the delayed switching on of the heating element would proportionately only have a very small effect.
  • the time interval specified by the timer can be on the order of 2 to 6 minutes.
  • the heating element can be subjected to different power as a function of the ambient temperatures of the refrigeration device, in particular at low ambient temperatures with lower power than at higher ambient temperatures. Additionally and / or alternatively, the
  • Heating element depending on the door openings per unit of time differently long, in particular with an increasing number of door openings are operated longer.
  • the refrigeration device even with increasing ambient temperature for the refrigeration device the
  • the cold air flow can be supplied to the work space by means of a cold air duct.
  • a valve element may preferably be arranged in the cold air duct. When the cooling signal is present, the valve element opens the cold air duct or closes it when the cooling signal is absent.
  • a fan may be provided for generating the cold air flow, which promotes the cold air through the cold air duct.
  • the heating element is not in direct signal connection with the control device, ie is not controlled directly by the control device, as a result of which the power capacity of the control device can be reduced.
  • an opening sensor be assigned, which is in direct signal connection with the heating element.
  • the opening sensor can generate an opening signal when the valve element is opened, as a result of which the heating element can be switched on.
  • the valve element is directly in signal connection with the control device, ie the control device opens or closes the valve element.
  • the control device does not directly control the heating element.
  • the heating element may be provided in a, the utility space facing channel wall of the cold air flow.
  • the duct wall air outlets are provided, through which the cold air flow can flow into the utility compartments.
  • the outside of the channel wall facing the working space is therefore particularly susceptible to condensation.
  • Fig. 1 in a rough schematic diagram of a refrigeration device the first
  • Fig. 2 is a timing diagram showing the operating states of Abtaubindimplantations during a refrigeration unit operation as well as a superimposed signal waveform over time of a cooling signal generated by a control device S ⁇ ;
  • FIG. 3 shows a refrigerator according to the second embodiment in a view corresponding to FIG. 1.
  • a refrigeration device with a bottom-side freezer compartment 1 and an upper cooling chamber 3 is shown in a schematic side sectional view, which are separated by a horizontal partition 5 from each other.
  • the cooling space 3 is divided into three cooling compartments 6 by means of two horizontal floors 4.
  • Both the partition 5 and the outer walls of the refrigerator are constructed in a heat-insulating manner in a known manner.
  • the two freezing and refrigerating rooms 1, 3 are closed at the front with a door 7.
  • an evaporator 9 is provided in a conventional manner, which is exemplarily thermally coupled to the back of the freezer compartment 1 here.
  • the evaporator 9 is part of a known refrigerant circuit 11.
  • a compressor 13 and an expansion valve 15 is also connected.
  • the freezer compartment 1 is shown in FIG. 1 via a cold air duct 17 fluidly connected to the cooling chamber 3 in connection.
  • the cold air duct 17 extends vertically upwards to immediately below the ceiling wall of the cooling space 3 delimiting the cold room channel 17 refrigerator.
  • the cold air duct 17 is separated from the cooling space 3 by means of a cold air duct cover wall 21.
  • air passages 23 are provided, can flow through the horizontally oriented cold air flows into the individual cooling compartments 6 of the cooling chamber 3.
  • a blower 25 is arranged in the area of the air inlet 19 of the cold air duct 17, a blower 25 is arranged. In the flow direction downstream of the blower 25 is provided as a valve element 27 by means of an actuator 27 driven by electric motor flap.
  • the flap 29 is shown in FIG. 1 in its open position, in which by means of the blower 25 cold air from the freezer compartment 1 can flow into the cold air duct 17. In contrast, in the closed position, not shown, the flap 29 locks the cold air duct 17, so that no cold air can flow into the cold air duct 17.
  • each room sensors 31, 33 are provided which detect each actual temperatures in the cooling and freezing rooms 1, 3 and direct to a control device 35.
  • the control device 35 Exceeds the detected by the freezer compartment sensor 31 actual temperature in the freezer compartment 1, a user specified target temperature, the control device 35 generates a cooling signal, with which via the signal line 38 of the compressor 13 is activated. As a result, a corresponding cooling power is introduced into the freezer compartment 1 via the evaporator 9.
  • the compressor 13 is put out of action by the control device 35 as soon as the actual temperature detected by the freezer space sensor 31 falls below the predetermined setpoint temperature.
  • the actual temperature of the refrigerator compartment 3 is also detected by the refrigerator compartment sensor 33 and directed to the control unit 35.
  • the detected by the refrigerator sensor 33 actual temperature is compared with a set temperature.
  • the control device 35 When the desired temperature is exceeded, the control device 35 generates a cooling signal S K , as illustrated in FIG. 2.
  • the cooling signal S ⁇ is passed via the signal lines 36, 37, 38 to the actuator 27 of the flap 29, which is adjusted to the open position shown. Accordingly, the blower 25 and the compressor 13 are put into operation via the signal line 37 and 38, respectively. In this way, a cold air flow I is generated, which is passed from the freezer compartment 1 via the cold air duct 17 into the cooling chamber 3.
  • a defrost heating element 39 is integrated according to FIG. 1, with the help of which a condensation formation on the side of the cover wall 21 facing the cooling space 3 is avoided. If a cooling signal S K is generated by exceeding the target temperature in the cooling chamber 3 in the control device 35, the control device 35 controls not only the flap 29, the blower 25 and the compressor 13, but also via the signal line 41, the defrost heater 39th ,
  • a timer 43 is connected in the signal line 41. By means of the timer 43 is a forwarding of the cooling signal S ⁇ to
  • the temporal waveform of the cooling signal S K is shown.
  • the waveform of the signal S cooling ⁇ is superimposed with the terms of the Abtaugnacele- mentes 39. Accordingly, is generated from a time ti by the control device 35 over a time interval At the cooling signal S ⁇ .
  • the cooling signal S ⁇ delayed via the timer 43 is forwarded to the defrost heater 39. Therefore, the Abtauheizelement 39 remains, despite the presence of the cooling signal S ⁇ about the, predetermined by the timer 43 time interval .DELTA.t v continue out of operation. Only after the expiration of the time interval .DELTA.t v , the cooling signal S ⁇ is passed to the defrost heater 39 and this is activated.
  • FIG 3 shows a refrigerator according to the second embodiment is shown, which is largely identical in construction and operation with the refrigerator of the first embodiment. In this respect, reference is made to the description of the first embodiment.
  • the defrost heating element 39 is not connected to the control device 35 via the signal line 41.
  • the defrost heating element 39 is thus not acted upon directly by the control device 35 with the cooling signal S ⁇ .
  • an opening sensor 45 is provided in the flap actuator 27.
  • the opening sensor 45 controls in response to a detected flap opening signal via the signal line 47 to the defrost heater 39, whereby the control device 35 is relieved of signal technology in comparison to the first embodiment.
  • the timer 43 is connected, the also only delayed after the expiry of the time interval .DELTA.t v the Abtauheizelement 39 drives.

Landscapes

  • 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)
  • Defrosting Systems (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

L'invention concerne un appareil de réfrigération, notamment un réfrigérateur à usage ménager, comprenant un espace utile (3) pour entreposer des produits à réfrigérer et un dispositif de commande (35) servant à envoyer un flux d'air froid (I) dans l'espace utile (3), en présence d'un signal de refroidissement (SK), ainsi qu'un élément chauffant de dégivrage pour éviter les phénomènes de condensation ou de formation de givre inhérents au flux l'air froid (I) introduit dans l'espace utile (3). Un élément minuteur (43) est associé à l'élément chauffant (39) et sert à maintenir ledit élément chauffant (39) à l'arrêt pendant une période prédéterminée (Δtv), une fois le signal de refroidissement (SK) produit.
EP09799562A 2008-12-18 2009-11-24 Appareil de réfrigération et procédé de régulation de la température et de prévention du givrage dans un appareil de réfrigération Withdrawn EP2379966A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008054934A DE102008054934A1 (de) 2008-12-18 2008-12-18 Kältegerät sowie Verfahren zur Temperaturregelung in einem Kältegerät
PCT/EP2009/065745 WO2010078997A2 (fr) 2008-12-18 2009-11-24 Appareil de réfrigération et procédé de régulation de la température dans un appareil de réfrigération

Publications (1)

Publication Number Publication Date
EP2379966A2 true EP2379966A2 (fr) 2011-10-26

Family

ID=42220580

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09799562A Withdrawn EP2379966A2 (fr) 2008-12-18 2009-11-24 Appareil de réfrigération et procédé de régulation de la température et de prévention du givrage dans un appareil de réfrigération

Country Status (8)

Country Link
US (1) US10066865B2 (fr)
EP (1) EP2379966A2 (fr)
JP (1) JP2012513009A (fr)
KR (1) KR20110111372A (fr)
CN (1) CN102257340B (fr)
DE (1) DE102008054934A1 (fr)
RU (1) RU2509966C2 (fr)
WO (1) WO2010078997A2 (fr)

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US8826679B2 (en) * 2010-12-01 2014-09-09 General Electric Company Refrigerator energy and temperature control
GB2486660B (en) * 2010-12-21 2016-08-24 Chop-Cloc (Scotland) Ltd Improvements in or relating to temperature-independent control of a thermostatically-controllable cooling and/or heating appliance
DE102012221295A1 (de) * 2012-11-21 2014-05-22 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit einem Kühlfach
US9784490B2 (en) * 2013-03-14 2017-10-10 Tippmann Companies Llc Refrigeration system with humidity control
DE102015007359A1 (de) * 2014-10-29 2016-05-04 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
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Also Published As

Publication number Publication date
US20110225994A1 (en) 2011-09-22
RU2011124740A (ru) 2013-01-27
JP2012513009A (ja) 2012-06-07
KR20110111372A (ko) 2011-10-11
CN102257340B (zh) 2014-08-13
US10066865B2 (en) 2018-09-04
WO2010078997A3 (fr) 2011-10-27
WO2010078997A2 (fr) 2010-07-15
CN102257340A (zh) 2011-11-23
RU2509966C2 (ru) 2014-03-20
DE102008054934A1 (de) 2010-07-01

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