EP1508008B1 - Appareil de congelation a indicateur de degivrage - Google Patents
Appareil de congelation a indicateur de degivrage Download PDFInfo
- Publication number
- EP1508008B1 EP1508008B1 EP03737963A EP03737963A EP1508008B1 EP 1508008 B1 EP1508008 B1 EP 1508008B1 EP 03737963 A EP03737963 A EP 03737963A EP 03737963 A EP03737963 A EP 03737963A EP 1508008 B1 EP1508008 B1 EP 1508008B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- time
- freezer
- measuring circuit
- ice
- door
- 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
- 238000010257 thawing Methods 0.000 title description 11
- 238000007710 freezing Methods 0.000 claims abstract 2
- 230000008014 freezing Effects 0.000 claims abstract 2
- 238000001816 cooling Methods 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000001419 dependent effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 16
- 102000016550 Complement Factor H Human genes 0.000 description 4
- 108010053085 Complement Factor H Proteins 0.000 description 4
- 239000003570 air Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001755 vocal effect Effects 0.000 description 1
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
- F25D21/02—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
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/11—Sensor to detect if defrost is necessary
-
- 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
- F25B2700/11—Sensor to detect if defrost is necessary
- F25B2700/111—Sensor to detect if defrost is necessary using an emitter and receiver, e.g. sensing by emitting light or other radiation and receiving reflection by a sensor
-
- 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
- F25D2400/08—Refrigerator tables
-
- 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
- F25D2700/14—Sensors measuring the temperature outside the refrigerator or freezer
Definitions
- the present invention relates to a freezer such as a freezer, a freezer or a fridge-freezer.
- Such freezers have to cool their interior to an evaporator, which has temperatures below 0 ° C under normal operating conditions and as a result, precipitates moisture from the interior. This moisture can form an ice crust in the course of operation of the refrigerator, which continues to affect the efficiency of the evaporator with increasing thickness.
- no-frost devices In order to prevent the formation of an excessively thick layer of ice on the evaporator, so-called no-frost devices have been developed in which the evaporator is automatically - usually time-controlled - defrosted. This is possible without appreciable heating of the refrigerated goods, because the evaporator is housed in a separate from refrigerated goods storage room of the refrigerator chamber and the storage room is cooled by circulating air between this and the chamber of the evaporator. By switching off the circulation, the heat exchange between the evaporator chamber and the storage space can be temporarily greatly reduced. Thus, it is possible to heat the evaporator in the chamber for defrosting, without this at the same time leads to an undesirable heating of the refrigerated goods.
- Static freezers i. Freezers without automatic defrosting, on the other hand, may have a simpler structure, since the evaporator can be mounted directly on the refrigerated goods storage room. Also, a device for air circulation is not required. Static freezers are therefore generally cheaper to buy than comparable appliances with no-frost automatic, and due to the omission of the heating, they also seem to have a better energy efficiency than the latter, so that some users prefer them to no-frost appliances.
- the publication US 2001/0054292 A1 shows a measuring circuit for estimating the amount of ice on the cooling surface from an after-compressor running time exceeding a predetermined compressor running time.
- the object of the present invention is to specify a refrigeration appliance which facilitates the detection of the optimum defrosting time for the user.
- the freezer is equipped with a built-in, activated by the warning signal display element.
- the display element is preferably an optical display element, as a user can ignore an optical warning signal rather than an acoustic one for a time until he has time to defrost the device without being overly bothered by the signal.
- the freezer may also be equipped with an interface for transmitting the warning signal in a data network in order to be able to display the warning signal on a remote from the freezer data terminal.
- the measuring circuit may comprise at least one ice sensor for detecting the presence or the layer thickness of ice on the cooling surface.
- sensors may be based on optical principles, for example, they may utilize ice-coated, total internal reflection properties of a transparent surface portion on the cooling surface.
- acoustic measuring principles for example, the resonant frequency of an oscillator arranged on the cooling surface which is changed by ice coating can be detected and evaluated.
- the measuring circuit comprises a timing device, and that the Defrost is assumed when a time measured by the time-measuring device has exceeded a threshold value for a fixed time.
- the date of commissioning of the freezer since its last defrosting operation can be assumed as this fixed time.
- the time measured by the time-measuring device can be the total operating time of the freezer since the fixed point in time.
- the time measuring device measures only the time of the open of a door of the refrigerator since the specified time. This allows a more precise estimation of the amount of ice, since essentially only during the opening of the door moisture can be entered into the interior of the freezer, which is reflected as ice on the cooling surface.
- Another possibility, which is no longer included in the wording of claim 1, is to use the time-measuring device to measure the running time of a compressor of the freezer since the specified time.
- the measuring circuit measures the number of door openings instead of the time the door is open, and recognizes the need for defrost if this number exceeds a threshold.
- a control element which can be actuated by a user for setting the above-mentioned fixed time, and means for storing the state of the measuring circuit in a de-energized state of the freezer, are provided on the freezer.
- state parameters of the measuring circuit such as the limit value, a measured time, the number of door openings or the like can be saved over a de-energized state of the freezer, so that a short-term power failure does not lead to a reset of the measuring circuit or its detected Values leads.
- these storage means also store the state of the measuring circuit when the defrosting device is turned off, the operating element is required for re-establishing said predetermined time.
- the measuring circuit can be expediently equipped with a sensor which detects at least one climatic condition in the vicinity of the freezer.
- the detection result can be used to set the limit in dependence thereon, to weight the time measured by the time-measuring device with a factor dependent on the detected climatic condition, or to weight each door opening with such a factor.
- a suitable climatic condition is the ambient temperature or humidity.
- the measuring circuit comprises a timing device for measuring the running time of a compressor of the freezer and is adapted to estimate the amount of ice on the basis of the ratio of the duration of the compressor to its life or the total operating time of the freezer.
- Fig. 1 Freezer shown as an example is a refrigerator with built-frost compartment 1.
- An evaporator 2 forms the outer wall of the freezer compartment 1, which delimits this against a cooling compartment 3, which fills most of the interior of the refrigerator.
- a control panel 5 is arranged on the housing of the refrigerator, the various switches and / or controller 6 for adjusting the function of the refrigerator and a display element 7, for example, has a LED or LCD display.
- Electronic circuits for controlling the operation of the refrigerator in response to settings made by a user to the switch 6 are housed behind the control panel 5.
- These electronic circuits include a measuring circuit 8, which is schematically shown in FIG Fig. 2 is shown.
- the measuring circuit 8 is connected on the one hand to a switch 9, which is actuated by opening and closing the door 4. Such a switch is conventionally present in refrigerators for switching the interior lighting.
- the measuring circuit comprises a counter 10 for counting the door openings.
- the measuring circuit 8 is connected to the display 7. A working method of this simple embodiment of a measuring circuit is in Fig. 3 shown.
- the counter When switching on the refrigerator, the counter contains the value zero.
- the measuring circuit monitors the state of the door 4; as long as door 4 is closed, nothing happens; when the door is opened, the content n of the counter is incremented by 1 in step S2.
- the measuring circuit compares n with a predetermined threshold value N. If n ⁇ N, the process returns to step S1, if n ⁇ N, the warning signal is activated in step S5. This can be done, for example, by turning on a specially provided for this purpose element of the display 7.
- the display 7 may also be, for example, a digital display which serves, for example, to display a temperature measured by a temperature sensor inside the refrigerator and which is switched from a continuous display mode to a flashing mode in order to display the warning signal.
- step S6 If the user acknowledges the warning signal and shuts off the refrigerator to defrost it, the count value stored in the counter 10 is lost, so that when the refrigerator is restarted, the counter is zero (step S6).
- Fig. 3A shows a modification of the method Fig. 3
- the measuring circuit 8 expediently comprises a time measuring device, such as a monostable flip-flop (monoflop).
- a time measuring device such as a monostable flip-flop (monoflop).
- the timer is activated to measure a predetermined time interval, and during this interval, the processing pauses (S7).
- the count value n is incremented again (S2). The count here does not indicate the number of door openings since the last defrost, but a measure of the time that the door 4 has since been open.
- the steps S2, S4 are replaced by checking whether or not the compressor of the refrigerator is running.
- the count value n would be a measure of how often the compressor has been switched on since the last defrost or how long it has been running since.
- the measuring circuit 8 is additionally connected to a sensor 11 for detecting the air humidity and / or the temperature of the air in the vicinity of the refrigerator and / or with a reset switch 12 on the control panel 5.
- the counter 10 is non-volatile in this embodiment, that is, a numerical value stored therein is maintained in the event of a failure of the supply voltage of the refrigerator.
- Fig. 4 shows an example of a working method of the measuring circuit according to this embodiment.
- the procedure starts like that of the Fig. 3 with the measuring circuit waiting for the door 4 to be opened in step S11.
- the measuring circuit estimates, based on the measurement results provided by the sensor 11, a humidity factor H which is intended to be a measure of the amount of moisture that is introduced into the refrigerator when the door is opened.
- this humidity factor H is proportional to the absolute humidity content of the ambient air; this requires that with the help of the sensor 11 both relative humidity and temperature of the ambient air are measured. If the sensor 11 measures only one of these two variables, the moisture factor determined therefrom may at most be correlated with the actual moisture input, but this is also sufficient for the purposes of the invention.
- step S13 the count value n in the counter 10 is incremented by the humidity factor H, and then it is checked in step S14 whether the threshold value N is exceeded. If this is not the case and, in addition, after a predetermined period of time in step S 15, it is determined that the door is still open, the process returns to step S13. In this way, the counter 10 is incremented at regular intervals as long as the door is open. However, if it is determined that the door is closed, the process returns to step S11, where the door is reopened.
- step S14 If the check of step S14 indicates that the limit value N is exceeded, the warning signal is switched on (S16).
- the contents of the counter 10 are set to N, the increment in step S2 or step S13 are replaced by a decrement and a critical ice thickness on Evaporator, which requires a defrost, be considered reached when the counter reaches zero.
- an input of the measuring circuit 8 is connected to an output of a thermostat circuit 13 via which this signal for switching on and off of a compressor 14 of the refrigerator of the refrigerator in dependence on a in the interior measured temperature delivers.
- the length of the running phases of the compressor 14 in relation to the total operating time of the refrigerator depends, on the one hand, on the temperature difference maintained between the interior of the refrigerator and its surroundings and, on the other hand, on the effectiveness of the evaporator 2. That is, on maintaining a given interior temperature required running phase of the compressor 14 are the longer, the thicker the layer of ice on the evaporator 2, which isolates this against the interior.
- the measuring circuit 8 determines a moving average of the ratio of the duration of the running phases to the duration of the total operating time and provides the warning signal when this ratio exceeds a predetermined limit.
- a sensor 11 may be provided for the ambient temperature to allow the measuring circuit 8 to select the limit value depending on the ambient temperature and so at least partially compensate for the dependence of the running phase duration of the temperature difference to be maintained.
- Fig. 6 shows an example of a possible operation of the measuring circuit 8 from Fig. 5 .
- the process begins in step S21 with the initialization of the count value a in the counter 10 (which can be a real number here and represents a measure of the ratio of the compressor run time to the total run time of the refrigerator) to a value below a predetermined - If, subsequently, in step S22 it turns out that the compressor is turned on, the count a is incremented by 1 in step S23 and then a with a "forgetting factor" 1- ⁇ which is slightly less than 1, multiplied. If the compressor 14 is not turned on, the process goes from S22 directly to S24.
- the count value a in the counter 10 which can be a real number here and represents a measure of the ratio of the compressor run time to the total run time of the refrigerator
- the count value a is compared with the limit value A. If a is smaller, the warning signal stays off (S26), and the process returns to S22; if a is larger, the warning signal is turned on (S27) and the process also returns to S22.
- the warning signal is initially switched on only towards the end of a runtime phase of the compressor and goes out in a subsequent stance phase again. With increasing ice thickness, the periods in which the warning signal is switched on are getting longer, until finally it remains continuously switched on.
- the step S26 can also be omitted, then the warning signal remains permanently on as soon as the count a has exceeded the limit A for the first time.
- the measuring circuit 8 is provided to evaluate measuring signals of one or more sensors, which are arranged directly on the evaporator 2 in order to detect its ice thickness. Examples of such sensors are shown schematically in FIG FIGS. 7 and 8 shown.
- the sensor 21 of Fig. 7 has a transparent body 15 with a surface 16, which is arranged on the evaporator 2 so that it ices together with this.
- a light source 17 and a photodetector 18 are arranged behind the surface 16 such that a light beam emitted by the light source 17 and reflected on the surface 16 does not strike the photodetector 18. The reflection is strongest when the surface 16 is ice-free.
- an ice layer 19 is formed on the surface 16, light is diffracted into the ice layer and diffused in it. This scattered light is detected by photodetector 18; from its thickness can be inferred at least approximately on the thickness of the ice layer 19.
- the sensor 22 of Fig. 8 comprises a resonator 20 which can be electrically excited to oscillate and which is arranged on the evaporator 2 in such a way that it ices together with it.
- the resonant frequency of the resonator 20 depends on its mass and thus on the amount of ice 19 hanging therefrom. The resonance frequency thus allows a conclusion on the ice thickness.
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)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
Claims (9)
- Appareil de congélation avec un intérieur qui se ferme au moyen d'une porte (4), une surface de refroidissement (2) susceptible de givrer disposée à l'intérieur et un montage de mesure pour estimer la quantité de glace qui se trouve sur la surface de refroidissement (2) et délivrer un signal d'alarme lorsque la quantité de glace estimée excède une valeur limite, dans lequel le montage de mesure (8) comprend un dispositif de mesure du temps et est aménagé afin d'estimer la quantité de glace au moyen d'un temps mesuré depuis un instant déterminé par le dispositif de mesure du temps et qui est la durée d'ouverture de la porte (4) depuis l'instant déterminé ou dans lequel le montage de mesure (8) est aménagé afin d'estimer la quantité de glace au moyen du nombre d'ouvertures de porte depuis un instant déterminé.
- Appareil de congélation selon la revendication 1, caractérisé par un élément d'affichage (7), en particulier optique, activable par le signal d'alarme.
- Appareil de congélation selon la revendication 1 ou 2, caractérisé par une interface pour la transmission du signal d'alarme sur un réseau de données.
- Appareil de congélation selon l'une des revendications 1 à 3, caractérisé en ce que l'instant déterminé est l'instant de la première mise en service de l'appareil.
- Appareil de congélation selon l'une des revendications 1 à 3, caractérisé par un élément de commande (12) susceptible d'être actionné par un utilisateur afin de déterminer l'instant déterminé et des moyens (10) d'enregistrement de l'état du montage de mesure lorsque l'appareil de congélation est hors tension.
- Appareil de congélation selon l'une des revendications 1 à 5, caractérisé en ce que le montage de mesure (8) comprend un capteur (11) pour la saisie d'au moins une condition climatique dans l'environnement de l'appareil de congélation et est aménagé afin d'estimer la quantité de glace en fonction de la condition perçue.
- Appareil de congélation selon l'une des revendications 1 à 3, caractérisé en ce que le montage de mesure (8) présente un capteur (11) pour la saisie d'au moins une condition climatique dans l'environnement de l'appareil de congélation et en ce que le dispositif de mesure du temps est aménagé afin de pondérer le temps mesuré avec un facteur (H) dépendant de la condition climatique perçue.
- Appareil de congélation selon la revendication 7, caractérisé en ce que le montage de mesure (8) comprend un capteur (11) pour la saisie d'au moins une condition climatique dans l'environnement de l'appareil de congélation et est aménagé afin de pondérer chaque ouverture de porte avec un facteur (H) dépendant de la condition climatique perçue.
- Appareil de congélation selon l'une des revendications 6 à 8, caractérisé en ce que l'au moins une condition climatique perçue est la température ambiante et/ou l'humidité de l'air.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10221903 | 2002-05-16 | ||
DE2002121903 DE10221903A1 (de) | 2002-05-16 | 2002-05-16 | Gefriergerät mit Abtauanzeige |
PCT/EP2003/005081 WO2003098135A1 (fr) | 2002-05-16 | 2003-05-14 | Appareil de congelation a indicateur de degivrage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1508008A1 EP1508008A1 (fr) | 2005-02-23 |
EP1508008B1 true EP1508008B1 (fr) | 2012-07-11 |
Family
ID=29413899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03737963A Expired - Lifetime EP1508008B1 (fr) | 2002-05-16 | 2003-05-14 | Appareil de congelation a indicateur de degivrage |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1508008B1 (fr) |
CN (1) | CN100507408C (fr) |
AU (1) | AU2003245883A1 (fr) |
BR (1) | BR0310034A (fr) |
DE (1) | DE10221903A1 (fr) |
WO (1) | WO2003098135A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007066360A1 (fr) * | 2005-12-06 | 2007-06-14 | Giuseppe Floris | Dispositif de detection des caracteristiques de la glace / de la neige / du givre |
DE102006048880A1 (de) * | 2006-10-16 | 2008-04-17 | Wurm Gmbh & Co. Kg Elektronische Systeme | Abtausteuerverfahren |
CN101957116B (zh) * | 2009-07-17 | 2014-03-26 | 海尔集团公司 | 冰箱的除霜控制方法 |
US9328953B2 (en) | 2010-02-23 | 2016-05-03 | Lg Electronics Inc. | Refrigerator and controlling method thereof |
CN104930810B (zh) * | 2014-08-11 | 2017-05-24 | 国家电网公司 | 冰箱箱体后部内侧积冰检测报警系统 |
DE102016014488A1 (de) * | 2016-12-06 | 2018-06-07 | Liebherr-Hausgeräte Ochsenhausen GmbH | Gefriergerät |
CN107940873B (zh) * | 2017-11-17 | 2020-12-04 | 合肥美的电冰箱有限公司 | 化霜方法、化霜系统、计算机可读存储介质和制冷设备 |
DE102018115866A1 (de) * | 2018-06-29 | 2020-01-02 | Liebherr-Hausgeräte Ochsenhausen GmbH | Kühl- und/oder Gefriergerät |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4074987A (en) * | 1977-01-03 | 1978-02-21 | General Electric Company | Defrost sensing system for freezer compartment |
US4831833A (en) * | 1987-07-13 | 1989-05-23 | Parker Hannifin Corporation | Frost detection system for refrigeration apparatus |
JPH0686979B2 (ja) * | 1990-03-06 | 1994-11-02 | 山武ハネウエル株式会社 | 熱衝撃試験器の着霜予測装置 |
IT1255045B (it) * | 1992-03-31 | 1995-10-17 | Whirlpool Italia | Metodo e dispositivo per rilevare e controllare la formazione di brina su un evaporatore di un refrigeratore |
DE4318842A1 (de) * | 1993-06-07 | 1994-12-08 | York Int Gmbh | Verfahren zum Abtauen einer Kälteanlage |
EP0644386B1 (fr) * | 1993-09-22 | 1998-02-25 | Whirlpool Europe B.V. | Procédé pour le contrÔle dynamique de la formation de givre sur un évaporateur d'une armoire frigorifique et armoire frigorifique sur laquelle ce procédé est réalisé |
JP3497255B2 (ja) * | 1994-11-01 | 2004-02-16 | 松下冷機株式会社 | 冷凍装置 |
DE69616026T2 (de) * | 1996-04-26 | 2002-06-06 | Robertshaw Controls Co., Richmond | Abtausteuerung für ein Kühlsystem, wobei die Bestimmung der Umgebungstemperatur verwendet wird |
US5887443A (en) * | 1997-11-20 | 1999-03-30 | Samsung Electronics Co., Ltd. | Defrost control method and apparatus of refrigerator |
US6260365B1 (en) | 2000-01-07 | 2001-07-17 | Traulsen & Company, Inc. | Control system and related methods for refrigeration and freezer units |
AR027200A1 (es) * | 2000-01-11 | 2003-03-19 | Multibras Eletrodomesticos Sa | Dispositivo indicador de formacion de hielo en aparatos de refrigeracion |
-
2002
- 2002-05-16 DE DE2002121903 patent/DE10221903A1/de not_active Withdrawn
-
2003
- 2003-05-14 CN CNB038110822A patent/CN100507408C/zh not_active Expired - Fee Related
- 2003-05-14 WO PCT/EP2003/005081 patent/WO2003098135A1/fr not_active Application Discontinuation
- 2003-05-14 EP EP03737963A patent/EP1508008B1/fr not_active Expired - Lifetime
- 2003-05-14 BR BR0310034-0A patent/BR0310034A/pt not_active IP Right Cessation
- 2003-05-14 AU AU2003245883A patent/AU2003245883A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
DE10221903A1 (de) | 2003-12-04 |
BR0310034A (pt) | 2005-02-15 |
CN1653308A (zh) | 2005-08-10 |
AU2003245883A1 (en) | 2003-12-02 |
CN100507408C (zh) | 2009-07-01 |
WO2003098135A1 (fr) | 2003-11-27 |
EP1508008A1 (fr) | 2005-02-23 |
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