EP0277104A1 - Temperature supervising arrangement for a cabinet or the like - Google Patents
Temperature supervising arrangement for a cabinet or the like Download PDFInfo
- Publication number
- EP0277104A1 EP0277104A1 EP88850016A EP88850016A EP0277104A1 EP 0277104 A1 EP0277104 A1 EP 0277104A1 EP 88850016 A EP88850016 A EP 88850016A EP 88850016 A EP88850016 A EP 88850016A EP 0277104 A1 EP0277104 A1 EP 0277104A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- cabinet
- door
- temperature sensor
- arrangement according
- 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- Withdrawn
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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/008—Alarm devices
Definitions
- the present invention relates to an arrangement for supervising the temperature in a cabinet or the like according to the preamable of the following claim 1.
- a sensor When supervising the temperature in a compartment closed by a door, a sensor is often placed inside the compartment in a position where it senses the air temperature. In certain embodiments as a freezer the sensor is instead placed so that it senses the temperature of a shelf and then imitates the temperature of the objects stored on the shelf.
- Freezer thermometers are usually meant for indicating the temperature of the freezer goods.
- the shown value can constitute the average value of many measure values collected during a certain period. If now one wishes to provide the cabinet with an alarm device giving a warning when the door unintentionally has been left open or has for some reason opened itself, it lies near at hand to utilize the temperature value shown. As the temperature must nomally deviate substantially from the normal level, e.g. 10 degrees, and the average value shown is changed very slowly, this has the effect that the alarm is not activated until a long time has elapsed. By that, a risk will arise that the goods will deteriorate in quality and might even be destroyed.
- the purpose of the invention as applied to a device for supervising the temperature in a cabinet according to the premable of claim 1 is to ensure acitivation of the alarm device a short predetermined time after the door has been opened. In that way, for example in freezers, damages on the goods caused by the rise in the temperature can be reduced or at best be avoided.
- a few minutes should be chosen so that a normal opening of the door in connection with putting in or taking out goods will not activate the alarm device.
- Fig. 1 shows a front view of a freezer cabinet
- Fig. 2 shows a cross section through the cabinet seen from the side and with the door slightly open. The cross section is situated along the line II - II in Fig. 1.
- the drawing shows a freezer 10 of a customary design.
- the cabinet comprises a cabinet part II closed by a door 12.
- the door can be operated by means of a handle 13.
- frozen foods can be stored on shelves 14, 15, 16.
- the door consists of an interior wall 17 and an outer wall 18, separated by an insulating layer 19.
- Recesses 20, 21 on the interior and on the outer wall, respectively, situated just opposite each other, are utilized when fitting a holder 22 for a temperature sensor 23, constructed as a thermister, as well as for a unit 24 containing a temperature indicator device in the shape of a digital display 25 combined with a temperature supervising device.
- the unit 24 thereby constitutes a control device for the temperature as well as for the alarm indication.
- a warning light 26 is used.
- the holder 22 and the unit 24 are separated by the insulating layer 19 except for a little space where a thin channel 27 is made in the insulating layer through which the temperature indicator 23 is, by means of two wires 28, 29, connected to the unit 24.
- the holder 22 and the unit 24 are fixed in the respective recess by means of snap-in closures, not shown.
- the holder is constructed such that the temperature indicator will be situated at some distance from the interior wall of the door and so that it can be influenced by the ambient air.
- the unit 24, which especially includes a microprocessor, is constructed so that it through an average value formation of a number of instantaneous, measured air temperature values imitates the temperature of the freezing goods.
- This temperature is normally shown by the digital display 25 and changes in the air temperature only slowly influcence on the shown values, e.g. by one degree every 17th minute. This involves that the temperature value shown will not be capable of activating the temperature alarm. Instead, the momentarily measured values are utilized for this purpose. Therefore, the alarm can be activated as soon as the previously determined short time has elapsed and the microprocessor has confirmed that the values momentarily measured at still unacceptably high.
- the temperature sensor In known freezers with the temperature sensor situated inside the cabinet it might take a very long time until an unsatisfactorily closed door will be discovered leading to an alarm.
- the temperature sensor In the embodiment according to the invention the temperature sensor is situated in the separating plane between the door and the cabinet and if the door is slightly opened, warm air will immediately through chimney effect rise upwards in the door gap formed. The warm air will immediately influence on the temperature sensor, which inputs increased temperature values to the unit 24 and the latter activates the warning light 26 after the previously determined short time.
- a temperature indication device is arranged in the cabinet and visible from the outside through an opening in the door having the corresponding size. In the opening there is no insulation and a certain heat leakage has to be anticipated.
- any heat leakage has been avoided through the fact that only a thin channel connects the holder 22 with the unit 24 allowing the insulation to go into the space between the holder and the unit so that it surrounds the channel.
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)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Emergency Alarm Devices (AREA)
- Burglar Alarm Systems (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8700233 | 1987-01-21 | ||
SE8700233A SE8700233D0 (sv) | 1987-01-21 | 1987-01-21 | Anordning for overvakning av temperaturen i ett skap eller dylikt |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0277104A1 true EP0277104A1 (en) | 1988-08-03 |
Family
ID=20367242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88850016A Withdrawn EP0277104A1 (en) | 1987-01-21 | 1988-01-15 | Temperature supervising arrangement for a cabinet or the like |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0277104A1 (fi) |
DK (1) | DK16888A (fi) |
FI (1) | FI880242A (fi) |
SE (1) | SE8700233D0 (fi) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991016585A1 (en) * | 1990-04-17 | 1991-10-31 | T. Granström Konsult Ab | Alarm system for temperature supervision |
WO2005090884A1 (de) * | 2004-03-15 | 2005-09-29 | BSH Bosch und Siemens Hausgeräte GmbH | Kältegerät |
US20100083689A1 (en) * | 2008-07-31 | 2010-04-08 | Robinson Thomas A | Detection of the state of a refrigerator door |
CN106123431A (zh) * | 2016-06-24 | 2016-11-16 | 青岛海尔特种电冰柜有限公司 | 冷柜节能控制方法和冷柜 |
DE102018117462A1 (de) | 2018-07-19 | 2020-01-23 | Miele & Cie. Kg | Vorrichtung und Verfahren zum thermischen Isolieren von Kühlgut für ein Kühlgerät und Kühlgerät |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2358425A (en) * | 1941-10-27 | 1944-09-19 | John J Leary | Warning signal for refrigerators and the like |
US2696604A (en) * | 1952-08-02 | 1954-12-07 | Bailey Meter Co | Supervisory system |
FR1594494A (fi) * | 1968-01-30 | 1970-06-01 | ||
US3594752A (en) * | 1969-07-07 | 1971-07-20 | Gulton Ind Inc | Condition sensing and alarm unit and circuit therefor |
US3959787A (en) * | 1975-05-08 | 1976-05-25 | Lawrence Peska Associates, Inc. | Refrigeration alarm |
US4148194A (en) * | 1977-09-15 | 1979-04-10 | Kells John D | Refrigerator temperature controls |
DE3113541A1 (de) * | 1981-04-03 | 1982-11-04 | Linde Ag, 6200 Wiesbaden | Verfahren und vorrichtung zur ueberwachung der temperatur in kuehlmoebeln |
US4387578A (en) * | 1981-04-20 | 1983-06-14 | Whirlpool Corporation | Electronic sensing and display system for a refrigerator |
US4404813A (en) * | 1981-04-20 | 1983-09-20 | Whirlpool Corporation | Door mounted electronic housing assembly for a refrigerator |
US4407141A (en) * | 1982-01-04 | 1983-10-04 | Whirlpool Corporation | Temperature sensing means for refrigerator |
US4566285A (en) * | 1984-01-26 | 1986-01-28 | Whirlpool Corporation | Refrigerator door ajar alarm with variable delay |
-
1987
- 1987-01-21 SE SE8700233A patent/SE8700233D0/xx unknown
-
1988
- 1988-01-14 DK DK16888A patent/DK16888A/da not_active Application Discontinuation
- 1988-01-15 EP EP88850016A patent/EP0277104A1/en not_active Withdrawn
- 1988-01-20 FI FI880242A patent/FI880242A/fi not_active Application Discontinuation
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2358425A (en) * | 1941-10-27 | 1944-09-19 | John J Leary | Warning signal for refrigerators and the like |
US2696604A (en) * | 1952-08-02 | 1954-12-07 | Bailey Meter Co | Supervisory system |
FR1594494A (fi) * | 1968-01-30 | 1970-06-01 | ||
US3594752A (en) * | 1969-07-07 | 1971-07-20 | Gulton Ind Inc | Condition sensing and alarm unit and circuit therefor |
US3959787A (en) * | 1975-05-08 | 1976-05-25 | Lawrence Peska Associates, Inc. | Refrigeration alarm |
US4148194A (en) * | 1977-09-15 | 1979-04-10 | Kells John D | Refrigerator temperature controls |
DE3113541A1 (de) * | 1981-04-03 | 1982-11-04 | Linde Ag, 6200 Wiesbaden | Verfahren und vorrichtung zur ueberwachung der temperatur in kuehlmoebeln |
US4387578A (en) * | 1981-04-20 | 1983-06-14 | Whirlpool Corporation | Electronic sensing and display system for a refrigerator |
US4404813A (en) * | 1981-04-20 | 1983-09-20 | Whirlpool Corporation | Door mounted electronic housing assembly for a refrigerator |
US4407141A (en) * | 1982-01-04 | 1983-10-04 | Whirlpool Corporation | Temperature sensing means for refrigerator |
US4566285A (en) * | 1984-01-26 | 1986-01-28 | Whirlpool Corporation | Refrigerator door ajar alarm with variable delay |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991016585A1 (en) * | 1990-04-17 | 1991-10-31 | T. Granström Konsult Ab | Alarm system for temperature supervision |
WO2005090884A1 (de) * | 2004-03-15 | 2005-09-29 | BSH Bosch und Siemens Hausgeräte GmbH | Kältegerät |
US20100083689A1 (en) * | 2008-07-31 | 2010-04-08 | Robinson Thomas A | Detection of the state of a refrigerator door |
CN106123431A (zh) * | 2016-06-24 | 2016-11-16 | 青岛海尔特种电冰柜有限公司 | 冷柜节能控制方法和冷柜 |
CN106123431B (zh) * | 2016-06-24 | 2022-09-16 | 青岛海尔特种电冰柜有限公司 | 冷柜节能控制方法和冷柜 |
DE102018117462A1 (de) | 2018-07-19 | 2020-01-23 | Miele & Cie. Kg | Vorrichtung und Verfahren zum thermischen Isolieren von Kühlgut für ein Kühlgerät und Kühlgerät |
Also Published As
Publication number | Publication date |
---|---|
DK16888A (da) | 1988-07-22 |
SE8700233D0 (sv) | 1987-01-21 |
FI880242A (fi) | 1988-07-22 |
DK16888D0 (da) | 1988-01-14 |
FI880242A0 (fi) | 1988-01-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT SE |
|
17P | Request for examination filed |
Effective date: 19890105 |
|
18W | Application withdrawn |
Withdrawal date: 19890624 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
R18W | Application withdrawn (corrected) |
Effective date: 19890624 |