EP1332325B1 - Kältegerät mit abtau-automatik - Google Patents
Kältegerät mit abtau-automatik Download PDFInfo
- Publication number
- EP1332325B1 EP1332325B1 EP01982413A EP01982413A EP1332325B1 EP 1332325 B1 EP1332325 B1 EP 1332325B1 EP 01982413 A EP01982413 A EP 01982413A EP 01982413 A EP01982413 A EP 01982413A EP 1332325 B1 EP1332325 B1 EP 1332325B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- temperature
- evaporator
- temperatures
- lim
- 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.)
- Expired - Lifetime
Links
Images
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
- F25D21/002—Defroster 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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/02—Detecting the presence 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
- 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
- F25D2400/34—Temperature balancing 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
- 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
- F25D2700/14—Sensors measuring the temperature outside the refrigerator or freezer
Definitions
- the present invention relates to a refrigerator according to the preamble of claim 1.
- Such refrigerators also referred to as a no-frost refrigeration appliance, are e.g. used as household refrigerators or freezers.
- the evaporators of such refrigerators are equipped with heaters, which are operated from time to time to heat the evaporator to a temperature above 0 ° C and thus to bring Reif to melt, which is reflected in the course of operation on the evaporator and its Cooling performance impaired.
- the operating time of the refrigerator is measured to control the automatic defrost, and a defrost is initiated when a predetermined period of time has elapsed.
- a purely on the operating time oriented control can of course not take into account different conditions of use of a refrigerator.
- the amount of rime that accumulates in a given time in a household refrigerator can vary greatly, depending on how often and how long the door of the refrigerator is opened and how high the moisture content of the case entering the refrigerator outside air.
- a temperature-dependent automatic defrost control is also used. So it is e.g. It is known to measure the evaporation temperature and the air temperature at the evaporator inlet or outlet of an air-flowed evaporator and to initiate a defrosting process whenever the difference between these two temperatures exceeds an initial value measured immediately after a defrosting operation by a predetermined percentage.
- Object of the present invention is to provide a refrigeration device with defrosting automatic, which maintains a favorable time interval of defrosting even with changes in the outside temperature or set by a user target temperature of the refrigerator.
- the control circuit can be implemented in a simple manner with a memory which receives values of the limit value for different pairs of outdoor and cold room temperature.
- the control circuit may further comprise an interpolation unit for calculating the threshold for pairs of temperatures measured by the first and third sensor based on the values recorded in the memory.
- the limits are preferably selected for all pairs of outdoor and refrigerator temperature, that they correspond to a predetermined frost layer thickness on the evaporator. These values can be measured, for example, on a prototype of the refrigeration appliance under standardized conditions of use, and the limit values thus obtained are stored in the control devices of the refrigeration appliances supplied by the manufacturer.
- control device it is also conceivable to design the control device in such a way that it is able to change these limit values.
- the controller is capable of measuring the time required by the heater to defrost the evaporator, and thus inferring the amount of frost or film thickness actually present on the evaporator.
- the control means changes the threshold values of the second sensor so that the time required for the downtime converges to the set value. That is, if the defrost lasts too long, the limit of the temperature difference is lowered, if it does not last long enough, it will be increased.
- a refrigerator according to the invention acquires a set of limit values of the second temperature sensor in the course of its operation which is adapted in an absolutely flexible manner to the specific operating conditions of the refrigeration appliance.
- FIG. 1 shows a highly schematic representation of a refrigeration device with an insulating housing 1, which encloses a cooling space 2. From a refrigerant circuit of the refrigerator, an evaporator 3 in the interior of the refrigerator and a compressor 4 are shown in the figure, which supplies the evaporator 3 with liquefied refrigerant and evacuated vaporized refrigerant therefrom.
- a first sensor 5 is in the refrigerator for detecting of its temperature Ti arranged.
- a second temperature sensor 6 is located on the evaporator 3 in the vicinity of the refrigerant inlet to measure the evaporation temperature T v of the refrigerant.
- a third sensor 7 for measuring the outside temperature T e is arranged outside the housing 1. All three sensors are connected to a control device, here a microprocessor 8.
- the microprocessor 8 controls the operation of the compressor 4 on the basis of the temperature T i measured by the first sensor 5 and controls the operation of a heating element 9 arranged on the evaporator 3 on the basis of the temperatures measured by all three sensors 5, 6, 7 and a set of limit values stored in another microprocessor 8 memory 10 is stored.
- a first step S1 the microprocessor 8 detects the temperatures T i of the interior measured by the sensors 5, 6, 7, T e of the surroundings and T v of the evaporator.
- step S2 it determines a threshold T lim of the evaporator temperature associated with the measured values of T i , T e .
- This determination may be made, for example, by storing the microprocessor 8 among the pairs of indoor and outdoor temperature to which a threshold in the memory 10 which is closest to the measured pair of indoor and outdoor temperature and whose threshold value is taken as the associated threshold. It is also conceivable to round the measured temperature values in each case to the next higher or next lower temperature value to which a limit value is present in the memory 10.
- the microprocessor 8 for a pair (T i , T e ) of measured indoor and outdoor temperatures those four pairs (T i- , T e- ), (T i- , T e + ), (T i + , T e- ) and (T i + , T e + ) determined, for the T i- (T e- ) each to T i (T e ) next smaller and T i + (T e + ) of the to T i (T e ) next larger temperature value to which a limit is stored in the memory 10, and that the microprocessor the limit for (T i , T e ) by interpolation of the limits to (T i- , T e- ), (T i- , T e + ), (T i + , T e- ) and (T i + , T e + ).
- step S3 the found limit value T lim is compared with the evaporator temperature T v . If the evaporator temperature is higher than the threshold, it is concluded that defrosting is not yet necessary, and the process returns to the beginning. If the evaporator temperature T v is lower than the threshold, it is considered that a frost layer has formed on the evaporator, which must be defrosted. As a result, the microprocessor 8 sets a timer to 0 in step S4 and starts energizing the heater 9 to defrost the evaporator 3.
- step S5 the duration t is compared with a first limit value. If the duration t is greater than this limit lim1, the limit read from the memory 10 in step S2 is reduced in step S7. All other limits in memory remain unchanged. If t is smaller than the setpoint value lim1, a comparison of the time duration t with a smaller setpoint valuelim2 follows in step S8. If the time duration t falls below this setpoint value, the limit value T lim determined in step S 2 is increased in the memory 8 in step S 9.
- T lim remains unchanged.
- the reduction or increase of T lim in steps S7 and S9 can be done by subtracting or adding a fixed, small positive value or by subtracting or adding a value proportional to the difference between t and the set value lim1 or lim2. Also a reduction or enlargement by multiplying or dividing with a predetermined fixed or proportional to the factor factor comes into consideration.
- a limit value T lim for the evaporator temperature which is exactly one predetermined set thickness of a frost layer, is obtained over time for each use condition of the refrigerator defined by a pair (from an outside temperature T e and an interior or refrigerator temperature T i ) on the evaporator 3 corresponds.
- Changes in the conditions of use whether by fluctuations in the outside temperature T e or because a user sets a different refrigerator temperature T i between two defrosts, can no longer lead to disturbances in the rhythm of the defrosting operations, since for all combinations of these temperatures the appropriate evaporator temperature limit T v is stored as a limit in the memory 10.
- the defrost control is thus completely time-independent.
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)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10053422 | 2000-10-27 | ||
DE10053422A DE10053422A1 (de) | 2000-10-27 | 2000-10-27 | Kältegerät mit Abtau-Automatik |
PCT/EP2001/011660 WO2002035165A1 (de) | 2000-10-27 | 2001-10-09 | Kältegerät mit abtau-automatik |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1332325A1 EP1332325A1 (de) | 2003-08-06 |
EP1332325B1 true EP1332325B1 (de) | 2006-06-07 |
Family
ID=7661346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01982413A Expired - Lifetime EP1332325B1 (de) | 2000-10-27 | 2001-10-09 | Kältegerät mit abtau-automatik |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1332325B1 (es) |
CN (1) | CN1471622B (es) |
AT (1) | ATE329217T1 (es) |
BR (1) | BR0114956A (es) |
DE (2) | DE10053422A1 (es) |
ES (1) | ES2266279T3 (es) |
WO (1) | WO2002035165A1 (es) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022037880A1 (de) * | 2020-08-17 | 2022-02-24 | BSH Hausgeräte GmbH | Verfahren zum abtauen eines verdampfers eines kältegeräts |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10315524A1 (de) * | 2003-04-04 | 2004-10-14 | BSH Bosch und Siemens Hausgeräte GmbH | Kältegerät und Betriebsverfahren dafür |
DE102006048880A1 (de) * | 2006-10-16 | 2008-04-17 | Wurm Gmbh & Co. Kg Elektronische Systeme | Abtausteuerverfahren |
DE102007011114A1 (de) | 2007-03-07 | 2008-09-11 | BSH Bosch und Siemens Hausgeräte GmbH | Kältegerät |
DE202011110325U1 (de) * | 2011-09-23 | 2013-08-13 | Visteon Global Technologies, Inc. | Luftentfeuchtungseinheit |
EP2719978B1 (en) * | 2012-10-15 | 2015-06-17 | Whirlpool Corporation | Method for controlling a domestic refrigeration appliance |
DE102012221295A1 (de) * | 2012-11-21 | 2014-05-22 | BSH Bosch und Siemens Hausgeräte GmbH | Kältegerät mit einem Kühlfach |
CN108759257A (zh) * | 2018-07-12 | 2018-11-06 | 长虹美菱股份有限公司 | 一种风冷冰箱间室内自循环化霜规则 |
CN111322812A (zh) * | 2018-12-17 | 2020-06-23 | 青岛海尔生物医疗股份有限公司 | 风冷冰箱智能进入化霜的控制方法、控制装置及冰箱 |
CN112114602B (zh) * | 2019-06-20 | 2022-04-22 | 中科赛凌(中山)科技有限公司 | 一种控温方法和系统 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2629595A1 (de) * | 1976-07-01 | 1978-01-05 | Licentia Gmbh | Verfahren und vorrichtung zum abtauen des verdampfers bei einem kuehlgeraet mit abtauvorrichtung |
DE2711602A1 (de) * | 1977-03-17 | 1978-09-21 | Bosch Gmbh Robert | Abtauvorrichtung |
US4251988A (en) | 1978-12-08 | 1981-02-24 | Amf Incorporated | Defrosting system using actual defrosting time as a controlling parameter |
GB2133867B (en) * | 1983-01-21 | 1986-06-11 | Newtech Controls Ltd | Defrost control means |
DE3333907A1 (de) * | 1983-09-20 | 1985-04-04 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München | Verfahren und vorrichtung zur abtauregelung von waermepumpen |
US4884414A (en) * | 1987-08-26 | 1989-12-05 | Paragon Electric Company, Inc. | Adaptive defrost system |
JP3033260B2 (ja) * | 1991-07-25 | 2000-04-17 | 株式会社デンソー | 冷凍装置の除霜制御装置 |
WO2000026590A1 (en) * | 1998-10-31 | 2000-05-11 | Daewoo Electronics Co., Ltd. | Defrost control method for use in a refrigerator |
-
2000
- 2000-10-27 DE DE10053422A patent/DE10053422A1/de not_active Withdrawn
-
2001
- 2001-10-09 WO PCT/EP2001/011660 patent/WO2002035165A1/de active IP Right Grant
- 2001-10-09 AT AT01982413T patent/ATE329217T1/de not_active IP Right Cessation
- 2001-10-09 EP EP01982413A patent/EP1332325B1/de not_active Expired - Lifetime
- 2001-10-09 ES ES01982413T patent/ES2266279T3/es not_active Expired - Lifetime
- 2001-10-09 BR BR0114956-3A patent/BR0114956A/pt not_active IP Right Cessation
- 2001-10-09 DE DE50110072T patent/DE50110072D1/de not_active Expired - Lifetime
- 2001-10-09 CN CN01818141.4A patent/CN1471622B/zh not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022037880A1 (de) * | 2020-08-17 | 2022-02-24 | BSH Hausgeräte GmbH | Verfahren zum abtauen eines verdampfers eines kältegeräts |
Also Published As
Publication number | Publication date |
---|---|
CN1471622A (zh) | 2004-01-28 |
CN1471622B (zh) | 2010-05-26 |
DE10053422A1 (de) | 2002-05-08 |
ES2266279T3 (es) | 2007-03-01 |
WO2002035165A1 (de) | 2002-05-02 |
BR0114956A (pt) | 2003-11-04 |
EP1332325A1 (de) | 2003-08-06 |
ATE329217T1 (de) | 2006-06-15 |
DE50110072D1 (de) | 2006-07-20 |
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