EP1518078A1 - Verdampfer für ein kältegerät - Google Patents
Verdampfer für ein kältegerätInfo
- Publication number
- EP1518078A1 EP1518078A1 EP03759911A EP03759911A EP1518078A1 EP 1518078 A1 EP1518078 A1 EP 1518078A1 EP 03759911 A EP03759911 A EP 03759911A EP 03759911 A EP03759911 A EP 03759911A EP 1518078 A1 EP1518078 A1 EP 1518078A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- evaporator
- ice
- layer
- refrigeration device
- coating
- 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.)
- Granted
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 9
- 239000003507 refrigerant Substances 0.000 claims description 6
- 239000004922 lacquer Substances 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 241000446313 Lamella Species 0.000 description 5
- 239000011049 pearl Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 244000052616 bacterial pathogen Species 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/006—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
-
- 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
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
Definitions
- the present invention relates to an evaporator for a refrigerator.
- the surface of such an evaporator when supplied with refrigerant, reaches temperatures below 0 ° C. Air humidity from the interior of the refrigerator can therefore condense and freeze on the surface of the evaporator.
- the temperature of the evaporator varies over time, depending on whether it is supplied with refrigerant or not, this layer of ice will expand and contract periodically over time. In the process, tensions build up between the ice layer and the evaporator underneath, which ultimately leads to a jerky shift of the ice layer. The resulting cracking noises are perceived as annoying.
- the object of the present invention is to provide an evaporator for a refrigeration device in which these cracking noises are reduced.
- the object is achieved in that the surface of the evaporator, on which ice could form, is provided with a hydrophobic coating.
- Such a coating is effective to delay the formation of the first ice crystals on an ice-free evaporator and thus to extend the time required for an amount of ice to have accumulated on the evaporator after a defrosting process. That is strong enough to cause crackling noises.
- Another effect of the hydrophobic layer is that it prevents the formation of a homogeneous layer of frost on the surface of the evaporator. Instead, icing begins on a small number of unavoidable germs on the surface of the evaporator. The ice pearls that form there grow more or less uniformly over their entire surface and thus reach a considerable thickness before they start to grow together. This means that a large amount of ice can collect on the evaporator according to the invention in comparison with a non-hydrophobic evaporator, before a coherent layer is created that is capable of generating crackling noises.
- Another advantage of the island growth of the ice layer is that surface areas of the evaporator remain ice-free for a relatively long time and enable an effective heat exchange between the refrigerant and the surroundings of the evaporator even if a considerable amount of ice has already accumulated on other areas of the evaporator surface.
- the time interval between two defrosting phases can therefore be selected to be longer than in the case of a non-hydrophobic evaporator, which for the user of a refrigeration device equipped with an evaporator according to the invention includes an increase in comfort and a reduction in the energy consumption of the refrigeration device and thus its operating costs.
- the hydrophobic coating can preferably contain a silicone as a hydrophobizing component.
- the coating can be applied as a solidifying lacquer layer or as an oil layer.
- the oil layer has the particular advantage that, since it does not become solid in itself, it favors the displaceability of the ice pearls that form on the surface of the evaporator, so that even with complete icing of the evaporator with a layer thickness that is used in a conventional evaporator Generation of cracking noises is sufficient, these are reduced in the evaporator according to the invention, since for a shift of the ice crust with respect to the evaporator no high thermal stresses need to be built up, which discharge in loud crackling noises, but a much lower voltage is sufficient to relate the ice layer to slide on the evaporator or possibly even a continuous sliding movement of the ice layer on the evaporator occurs.
- the evaporator according to the invention is preferably constructed as a finned evaporator which is suitable for use in a circulating air refrigerator or freezer.
- the attached figure shows a schematic view of a partially iced section of a finned evaporator 4 according to the invention.
- the finned evaporator 4 comprises a tube 1 through which refrigerant flows during operation.
- a lamella 2 wound helically.
- condensation nuclei In order for air moisture to condense on the finned evaporator 4, surface areas must be present on it where the condensation is energetically favorable. Such places are mostly condensation nuclei in the form of dust particles, surface discontinuities or the like, which are inevitably present on the surface of the lamella evaporator, but only make up a very small part of it. As shown in FIG. 1, a large number of compact ice pearls 3 form on these condensation nuclei during operation of the lamella evaporator 3.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Paints Or Removers (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10227135 | 2002-06-18 | ||
| DE10227135A DE10227135A1 (de) | 2002-06-18 | 2002-06-18 | Verdampfer für ein Kältegerät |
| PCT/EP2003/005864 WO2003106902A1 (de) | 2002-06-18 | 2003-06-04 | Verdampfer für ein kältegerät |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1518078A1 true EP1518078A1 (de) | 2005-03-30 |
| EP1518078B1 EP1518078B1 (de) | 2006-06-07 |
Family
ID=29719201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03759911A Expired - Lifetime EP1518078B1 (de) | 2002-06-18 | 2003-06-04 | Verdampfer für ein kältegerät |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1518078B1 (de) |
| CN (1) | CN1313787C (de) |
| AT (1) | ATE329214T1 (de) |
| AU (1) | AU2003232849A1 (de) |
| DE (2) | DE10227135A1 (de) |
| ES (1) | ES2266858T3 (de) |
| PL (1) | PL202378B1 (de) |
| RU (1) | RU2306498C2 (de) |
| WO (1) | WO2003106902A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008041480A1 (de) | 2008-08-22 | 2010-02-25 | BSH Bosch und Siemens Hausgeräte GmbH | Kältegerät und Verdampfer |
| US20180274868A1 (en) * | 2015-09-23 | 2018-09-27 | Linde Aktiengesellschaft | Heat transfer tube, air-heated evaporator and method for producing a heat transfer tube |
| CN208652988U (zh) * | 2018-07-13 | 2019-03-26 | 佛山嘉森电器有限公司 | 一种高效低噪翅片蒸发器 |
| US11519671B2 (en) | 2020-07-27 | 2022-12-06 | Rheem Manufacturing Company | Evaporator for water heating device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3868830A (en) * | 1973-08-31 | 1975-03-04 | Nasa | Condensate removal device for heat exchanger |
| JPH03244680A (ja) * | 1990-02-22 | 1991-10-31 | Matsushita Refrig Co Ltd | 撥水性コーティング用組成物及び撥水性コーティング用組成物を用いた熱交換器 |
| US5181558A (en) * | 1990-11-13 | 1993-01-26 | Matsushita Refrigeration Company | Heat exchanger |
| CN1027835C (zh) * | 1990-11-17 | 1995-03-08 | 衡阳市科技开发服务中心 | 套装式蒸发器的制作方法及其产品 |
| RU2013749C1 (ru) * | 1991-04-02 | 1994-05-30 | Омское научно-производственное объединение "Сибкриотехника" | Конденсатор-испаритель |
| CN1127877A (zh) * | 1995-01-26 | 1996-07-31 | 大连海事大学 | 制冷蒸发器 |
| JPH09113181A (ja) * | 1995-10-19 | 1997-05-02 | Kobe Steel Ltd | 熱交換器用アルミニウム部材及びその製造方法 |
| CN1103904C (zh) * | 1996-05-10 | 2003-03-26 | 株式会社日立制作所 | 户外热交换单元及使用该单元的空调器 |
| ES2332203T3 (es) * | 1996-05-31 | 2010-01-28 | Toto Ltd. | Elemento antiincrustante y composicion de revestimiento antiincrustante. |
| JPH11264632A (ja) * | 1998-03-19 | 1999-09-28 | Sanyo Electric Co Ltd | 熱交換器およびその製造方法 |
-
2002
- 2002-06-18 DE DE10227135A patent/DE10227135A1/de not_active Withdrawn
-
2003
- 2003-06-04 WO PCT/EP2003/005864 patent/WO2003106902A1/de not_active Ceased
- 2003-06-04 EP EP03759911A patent/EP1518078B1/de not_active Expired - Lifetime
- 2003-06-04 RU RU2004135374/06A patent/RU2306498C2/ru not_active IP Right Cessation
- 2003-06-04 DE DE50303711T patent/DE50303711D1/de not_active Expired - Lifetime
- 2003-06-04 CN CNB03814199XA patent/CN1313787C/zh not_active Expired - Fee Related
- 2003-06-04 AU AU2003232849A patent/AU2003232849A1/en not_active Abandoned
- 2003-06-04 ES ES03759911T patent/ES2266858T3/es not_active Expired - Lifetime
- 2003-06-04 PL PL372050A patent/PL202378B1/pl not_active IP Right Cessation
- 2003-06-04 AT AT03759911T patent/ATE329214T1/de not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03106902A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003232849A1 (en) | 2003-12-31 |
| ATE329214T1 (de) | 2006-06-15 |
| DE50303711D1 (de) | 2006-07-20 |
| PL202378B1 (pl) | 2009-06-30 |
| RU2306498C2 (ru) | 2007-09-20 |
| WO2003106902A1 (de) | 2003-12-24 |
| EP1518078B1 (de) | 2006-06-07 |
| RU2004135374A (ru) | 2005-08-27 |
| DE10227135A1 (de) | 2004-01-08 |
| ES2266858T3 (es) | 2007-03-01 |
| CN1662782A (zh) | 2005-08-31 |
| PL372050A1 (en) | 2005-07-11 |
| CN1313787C (zh) | 2007-05-02 |
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