EP1579183A1 - Temperaturanzeigeelement für ein kältegerät - Google Patents
Temperaturanzeigeelement für ein kältegerätInfo
- Publication number
- EP1579183A1 EP1579183A1 EP03785821A EP03785821A EP1579183A1 EP 1579183 A1 EP1579183 A1 EP 1579183A1 EP 03785821 A EP03785821 A EP 03785821A EP 03785821 A EP03785821 A EP 03785821A EP 1579183 A1 EP1579183 A1 EP 1579183A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- display element
- temperature display
- element according
- temperature
- film
- 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- Withdrawn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
- 238000005057 refrigeration Methods 0.000 title abstract description 5
- 150000001875 compounds Chemical class 0.000 claims abstract description 26
- 238000004382 potting Methods 0.000 claims abstract description 11
- 238000005266 casting Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 2
- 238000009489 vacuum treatment Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 12
- 239000000049 pigment Substances 0.000 description 7
- 235000013305 food Nutrition 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 206010061217 Infestation Diseases 0.000 description 2
- 241000186781 Listeria Species 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 240000002129 Malva sylvestris Species 0.000 description 1
- 235000006770 Malva sylvestris Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 235000013351 cheese Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
-
- 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
- F25D2400/36—Visual displays
-
- 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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
Definitions
- the present invention relates to a temperature display element for a refrigerator, which is provided to be installed inside a refrigerator and to enable a user to quickly determine whether the temperature prevailing at the location of the display element is suitable for the storage of certain foods or not.
- the temperatures inside a refrigerator can differ by several degrees Celsius between the various compartments with the same thermostat setting, and noticeable temperature gradients can also occur within a compartment between the rear wall, to which the evaporator is generally attached, and the door, the seal of which in the Generally the weakest point of the thermal insulation of the refrigerator is.
- storage temperatures are desirable, some of which are significantly below the values that are favorable for other refrigerated goods.
- storage temperatures of not more than 4 ° C should be maintained.
- thermochromic pigments i.e. dyes
- Such a pigment can, for example, be applied to a film or embedded in a film which is glued to a carrier body which, on the one hand, gives the film mechanical stability and, on the other hand, serves as a thermal ballast which prevents the display from flipping too quickly when the Change temperatures in the refrigerator by opening the door.
- a protective cover This can be done, for example, by accommodating the film and carrier body in one housing.
- the object of the present invention is to provide an easy-to-manufacture, permanent temperature display element for a refrigerator.
- thermochromic layer is enclosed between a carrier body on which it is applied and a transparent casting compound.
- a permanent covering is created for the thermochromic layer, which ensures consistently good thermal contact between it and the carrier element and does not impair the visibility of the thermochromic layer.
- thermochromic pigments in particular those which change color in the temperature range of approximately + 4 ° C. preferred for the invention, are damaged even at moderately warm temperatures of above 45 ° C.
- a plastic material that cures at room temperature is preferably used as the casting compound.
- Polyurethane is particularly suitable from plastic material for enclosing the thermochromic layer.
- the casting compound In order to remove any air bubbles from the casting compound, it is preferably subjected to a vacuum treatment before curing.
- a metal plate in particular made of a good heat-conducting metal such as aluminum, is preferably used as the carrier body. Since the potting compound is also a thermal insulation of the thermochromic layer from the interior of the Refrigerator, the typically low thermal capacity of a metal is sufficient as thermal ballast; its good thermal conductivity ensures that there are no temperature gradients along the surface of the thermochromic layer, which can lead to uneven coloring of the layer and thus to an ambiguous reading result.
- the carrier body can be enclosed between the casting compound and a film.
- a film can also serve as a support for printed characters or pictograms, which give a user information about the use of the temperature display element. If the film is not present, such characters and pictograms could also be printed on the back of the hardened potting material.
- the temperature display element is also expediently provided with a marking which indicates a preferred orientation for the attachment of the temperature display element in a refrigeration device, in order to ensure that the temperature display element is mounted in the refrigeration device in such a way that characters or symbols of the thermochromic layer which are only undershot the limit temperature of approx. + 4 ° C become visible, appear in the correct orientation.
- thermochromic layer In order to ensure that the thermochromic layer is used in the correct orientation when manufacturing the temperature display element, it should also be expediently provided with an orientation mark.
- thermochromic view and the film are inserted together in a mold during production and cast with the sealing compound, a complementary orientation mark on the film is advantageous.
- Figure 1 is a plan view of a display element according to the invention. 2 shows a section through the temperature display element.
- Fig. 3 shows the attachment of the temperature display element in a refrigerator.
- Fig. 1 shows the temperature display element according to the invention in a plan view and Fig. 2 in a section, the section in the thickness direction of the element has a larger scale than in the longitudinal direction in order to be able to show the layer structure of the element more clearly.
- a circular aluminum disc 1 serves as a carrier for a thermochromically pigmented film 2 or for a pigment applied directly to the disc 1.
- the pigment is black above a temperature of + 4 ° C, below this temperature threshold it assumes a blue-green color.
- Letters 3 "OK" printed on the disk 1 in ordinary black ink only contrast with the pigment if the temperature is below 4 ° C. That is, if the letters 3 are recognizable, the temperature at the location of the element is suitable to store food there that is sensitive to Listeria infestation.
- the film 2 is embedded in a clear casting compound 4.
- the potting compound 4 completely surrounds a lateral edge 5 of the aluminum pane 1. This is sufficient for hermetically enclosing the film 2.
- the pane 1 could also be embedded in the potting compound 4 on its rear side.
- the potting compound 4 is a thermosetting plastic material, preferably a polyurethane. It is important that the potting compound 4 be a low temperature castable and hardening material since currently known thermochromic pigments have little resistance to elevated temperatures and those that are suitable for use in the film 2 at temperatures above 45 ° C damage.
- the hardening of the sealing compound 4 or at least an initial phase of hardening are carried out under vacuum in order to drive out any air bubbles that may still be present in the still liquid sealing compound before the sealing compound hardens.
- the back of the hardened casting compound body is laminated with a film 6, on the side facing the casting compound 4, pictograms 7 are printed, which represent various types of food for which storage is not recommended above 4 ° C. Based on the orientation of the pictograms 7 or a text printed on the film 6, the user can intuitively recognize the orientation in which the temperature display element is to be mounted. In this orientation, as shown in Fig.
- thermochromic film 2 is close to the lower end of the element, which when mounting the element in a refrigerator involuntarily forces it to maintain a minimum distance between the film 2 and a compartment ceiling that corresponds to the length of the Potting compound body above the aluminum disc 1 corresponds. This prevents the element from being mounted at a height that may differ significantly from the rest of the compartment.
- Two line-shaped orientation marks 16, 17 aligned with one another are printed on the thermochromic layer 2 or the film 6.
- the mark 16 shows the orientation of the letters 3, which are not visible when warm. If the film 6 and the aluminum disc 1 with the thermochromic layer 2 are placed in a mold during the manufacture of the temperature display element, then aligning the two marks 16, 17 ensures that the letters 3 appear in the correct orientation on the finished element.
- a self-adhesive layer 8 on the back of the film 6 is protected by a peel-off paper 9 which can be easily removed in order to attach the temperature display element to the inner wall of a refrigeration device at a designated location.
- a support element made of opaque plastic for this.
- the support element is then provided with a receptacle adapted to the contour of the support body, into which the support body 1 is inserted.
- the support element is printed with pictograms 7.
- the printed support element and the support body 1 embedded therein are covered by the transparent casting compound 4.
- Fig. 3 shows a schematic partial section through the body 10 of a refrigerator, in which the temperature display element 11 according to the invention is glued to the inside of a side wall 12. In the depth direction of the refrigerator, the temperature display element is placed approximately centrally in a compartment 14 delimited by shelves 13. A front edge of the area for which the temperature displayed by the display element 11 is representative is designated by two triangular marks 15 which are embossed, printed or glued on the side wall 12.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20219911U DE20219911U1 (de) | 2002-12-23 | 2002-12-23 | Temperaturanzeigeelement für ein Kältegerät |
| DE20219911U | 2002-12-23 | ||
| PCT/EP2003/014259 WO2004059272A1 (de) | 2002-12-23 | 2003-12-15 | Temperaturanzeigeelement für ein kältegerät |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1579183A1 true EP1579183A1 (de) | 2005-09-28 |
Family
ID=7978260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03785821A Withdrawn EP1579183A1 (de) | 2002-12-23 | 2003-12-15 | Temperaturanzeigeelement für ein kältegerät |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7845305B2 (de) |
| EP (1) | EP1579183A1 (de) |
| CN (1) | CN100487398C (de) |
| AU (1) | AU2003294855A1 (de) |
| DE (1) | DE20219911U1 (de) |
| WO (1) | WO2004059272A1 (de) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006057909A (ja) * | 2004-07-23 | 2006-03-02 | Sharp Corp | 冷蔵庫 |
| US7556425B2 (en) * | 2006-10-10 | 2009-07-07 | Robert Gordon Industries, Ltd. | Dual-wall container with heat activated and/or temperature-change activated color changing capability |
| US8540156B2 (en) | 2007-11-14 | 2013-09-24 | Varcode Ltd. | System and method for quality management utilizing barcode indicators |
| US11704526B2 (en) | 2008-06-10 | 2023-07-18 | Varcode Ltd. | Barcoded indicators for quality management |
| USD638852S1 (en) * | 2009-12-04 | 2011-05-31 | Nellcor Puritan Bennett Llc | Ventilator display screen with an alarm icon |
| US20110308271A1 (en) | 2010-06-18 | 2011-12-22 | Biocision, Inc. | Specimen freezing rate regulator device |
| US20120174853A1 (en) * | 2011-01-06 | 2012-07-12 | Robert Wilson | Temperature Sensing Food Stuff Label |
| US9217676B2 (en) * | 2013-06-21 | 2015-12-22 | Larry G. Laurain | Freezer failure indicator |
| US9933318B2 (en) | 2014-07-10 | 2018-04-03 | Michael E. Quest | Thermochromic clip for sensing temperature of air flowing through a vent in an air conditioning system |
| US10173492B2 (en) | 2014-07-10 | 2019-01-08 | TSI Products, Inc. | Dispensing canister apparatus with thermochromic clip |
| CN104596193A (zh) * | 2014-11-28 | 2015-05-06 | 青岛海尔股份有限公司 | 感温指示装置 |
| USD734180S1 (en) * | 2015-02-06 | 2015-07-14 | Lux Products Corporation | Thermostat |
| CN107615027B (zh) * | 2015-05-18 | 2020-03-27 | 发可有限公司 | 用于可激活质量标签的热致变色墨水标记 |
| US11988425B2 (en) * | 2015-10-23 | 2024-05-21 | Ac Avalanche Llc | Detection that a refrigerant is at a fully charged level |
| CN108850381A (zh) * | 2017-05-10 | 2018-11-23 | 雀巢产品技术援助有限公司 | 个性化模制的软糖产品及其制备方法 |
| IL276263B (en) * | 2020-07-23 | 2022-01-01 | Freshpoint Quality Assurance Ltd | A time-temperature indicator that can be selectively activated |
| KR102287685B1 (ko) * | 2020-08-24 | 2021-08-09 | 엔비에스티(주) | 패치형 체온 측정기와 그 응용 제품 |
| DE102023121810A1 (de) * | 2023-08-15 | 2025-02-20 | Vaillant Gmbh | Thermoreaktives Anzeigeelement, elektrisches Heizgerät und Verwendung eines thermoreaktiven Materials |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4859360A (en) * | 1983-10-27 | 1989-08-22 | Biosynergy, Inc. | Cholesteric liquid crystal formulations and time/temperature monitoring means |
| GB2226403A (en) * | 1988-12-21 | 1990-06-27 | Liquid Crystal Devices Ltd | Liquid crystal temperature indicating device |
| JPH04110373U (ja) * | 1991-03-06 | 1992-09-24 | サンデン株式会社 | シヨーケースの温度表示板 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3465590A (en) * | 1960-08-22 | 1969-09-09 | Sybron Corp | Thermometer |
| US3580079A (en) * | 1969-03-06 | 1971-05-25 | Abbott Lab | Thermometer indicator |
| US3631720A (en) * | 1969-10-22 | 1972-01-04 | Bio Medical Sciences Inc | Disposable thermometer |
| DE2350441A1 (de) * | 1973-10-08 | 1975-04-17 | Bernhard Nollen | Thermometer |
| US4030482A (en) * | 1975-11-20 | 1977-06-21 | Lake St. Louis Research Products, Inc. | Contact fever thermometer |
| CH625359A5 (en) * | 1976-11-18 | 1981-09-15 | Ips Int Prod Services | Process for manufacturing a multilayer element making it possible to obtain overlaid images visible one at a time at a specified temperature |
| US4081999A (en) * | 1976-11-26 | 1978-04-04 | Desco Corporation | Temperature indicator with limit detection apparatus |
| US4161557A (en) * | 1978-03-23 | 1979-07-17 | Liquid Crystal Products, Inc. | Polyvinyl butyral-liquid crystal film-forming composition and film |
| US4509533A (en) * | 1980-07-28 | 1985-04-09 | Melvin Chervitz | Fever thermometer |
| US4353990A (en) * | 1981-02-09 | 1982-10-12 | Minnesota Mining And Manufacturing Company | Sanitation indicator |
| DE8311840U1 (de) * | 1983-04-21 | 1984-01-12 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Gefriergeraet, insbesondere haushalts-gefrierschrank oder dgl. |
| US4753406A (en) | 1985-03-20 | 1988-06-28 | Matsushita Electric Industrial Co., Ltd. | Hanger for kitchen appliances |
| US4738549A (en) * | 1986-04-03 | 1988-04-19 | Plimpton R Gregory | Pool thermometer |
| US4779995A (en) * | 1986-09-04 | 1988-10-25 | American Thermometer Co., Inc. | Reusable liquid crystal thermometer |
| GB8700691D0 (en) * | 1987-01-13 | 1987-02-18 | Liquid Crystal Devices Ltd | Temperature responsive display device |
| US5072540A (en) * | 1987-05-07 | 1991-12-17 | Monzyk Bruce F | Device for measuring subsurface temperatures of liquid bodies, useful for determining optimum fishing locations |
| US5254473A (en) * | 1990-03-16 | 1993-10-19 | Jp Laboratories | Solid state device for monitoring integral values of time and temperature of storage of perishables |
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| CN2127493Y (zh) * | 1992-06-30 | 1993-02-24 | 丁智才 | 液晶冰箱温度计 |
| US5695284A (en) * | 1994-06-22 | 1997-12-09 | Waters; Gary H. | Thaw indicator unit and method of manufacture |
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| GB2318870B (en) * | 1996-10-30 | 2001-03-07 | James Ronald Hicken | This invention relates to a defrost temperature indicator device for frozen whole poultry birds |
| US5996357A (en) * | 1998-06-01 | 1999-12-07 | Daewoo Electronics Co., Ltd. | System for checking an internal temperature of a refrigerator by using a thermochromic member |
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| US6241386B1 (en) * | 1998-12-28 | 2001-06-05 | Randy Martin Limburg | Decal with multiple concealing features that selectively display or conceal temperature sensors according to ambient temperature |
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| US6706218B2 (en) * | 2000-01-11 | 2004-03-16 | The Board Of Governors For Higher Education, State Of Rhode Island And Providence Plantations | Thermochromic polymers for rapid visual assessment of temperature |
| US6385860B1 (en) * | 2000-03-01 | 2002-05-14 | Smead Manufacturing Company | Label and method for applying |
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| DE10045897A1 (de) * | 2000-09-16 | 2002-03-28 | Bernd Spaeth | Reflektierende Elemente zur Warnung vor Frostgefahr, insbesondere zum An- oder Einbau in Strassenleitpfosten |
| CN2472211Y (zh) * | 2001-02-26 | 2002-01-16 | 宏全国际股份有限公司 | 塑性材料或金属材料表面的感温变色标识 |
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| DE10205589A1 (de) * | 2002-02-11 | 2003-08-21 | Bsh Bosch Siemens Hausgeraete | Kältegerät mit Temperaturbereichskennzeichnung |
| USD478822S1 (en) * | 2002-08-13 | 2003-08-26 | Dolores Kaiser | Ringing meat thermometer |
| DE20319460U1 (de) * | 2003-12-15 | 2004-02-26 | BSH Bosch und Siemens Hausgeräte GmbH | Kältegerät und Kühlgutträger dafür |
| US7258073B2 (en) * | 2004-01-20 | 2007-08-21 | Mcguire Katherine M | Pictorial thermometer |
| JP2006057909A (ja) * | 2004-07-23 | 2006-03-02 | Sharp Corp | 冷蔵庫 |
| US7343872B2 (en) * | 2005-11-07 | 2008-03-18 | Temptime Corporation | Freeze indicators suitable for mass production |
| US20080041298A1 (en) * | 2006-08-17 | 2008-02-21 | Ping-Kun Lin | Substrate with protected temperature sensing coating layer |
-
2002
- 2002-12-23 DE DE20219911U patent/DE20219911U1/de not_active Expired - Lifetime
-
2003
- 2003-12-15 AU AU2003294855A patent/AU2003294855A1/en not_active Abandoned
- 2003-12-15 US US10/540,280 patent/US7845305B2/en not_active Expired - Fee Related
- 2003-12-15 EP EP03785821A patent/EP1579183A1/de not_active Withdrawn
- 2003-12-15 WO PCT/EP2003/014259 patent/WO2004059272A1/de not_active Ceased
- 2003-12-15 CN CNB2003801099368A patent/CN100487398C/zh not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4859360A (en) * | 1983-10-27 | 1989-08-22 | Biosynergy, Inc. | Cholesteric liquid crystal formulations and time/temperature monitoring means |
| GB2226403A (en) * | 1988-12-21 | 1990-06-27 | Liquid Crystal Devices Ltd | Liquid crystal temperature indicating device |
| JPH04110373U (ja) * | 1991-03-06 | 1992-09-24 | サンデン株式会社 | シヨーケースの温度表示板 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2004059272A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE20219911U1 (de) | 2003-03-13 |
| CN100487398C (zh) | 2009-05-13 |
| WO2004059272A1 (de) | 2004-07-15 |
| US7845305B2 (en) | 2010-12-07 |
| AU2003294855A1 (en) | 2004-07-22 |
| US20060130733A1 (en) | 2006-06-22 |
| CN1754089A (zh) | 2006-03-29 |
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