EP2151656A1 - Dispositif de refroidissement présentant un risque de givre réduit - Google Patents

Dispositif de refroidissement présentant un risque de givre réduit Download PDF

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Publication number
EP2151656A1
EP2151656A1 EP09166670A EP09166670A EP2151656A1 EP 2151656 A1 EP2151656 A1 EP 2151656A1 EP 09166670 A EP09166670 A EP 09166670A EP 09166670 A EP09166670 A EP 09166670A EP 2151656 A1 EP2151656 A1 EP 2151656A1
Authority
EP
European Patent Office
Prior art keywords
moisture
cooling device
freezing point
freezing
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.)
Withdrawn
Application number
EP09166670A
Other languages
German (de)
English (en)
Inventor
Peter Horstmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2151656A1 publication Critical patent/EP2151656A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/006—Preventing deposits of ice
    • 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2245/00—Coatings; Surface treatments
    • F28F2245/04—Coatings; Surface treatments hydrophobic

Definitions

  • the invention relates to a cooling device for cooling a moisture-containing environment by means of heat energy transport, in particular in the manner of an evaporator, heat exchanger or the like, according to claim 1. Further, the invention relates to a coating of a contact region of a cooling device according to claim 10.
  • water-repellent coatings are provided, for example, in evaporators or certain fluidic means are arranged, which cause an air guide such that water droplets are entrained with the air flow.
  • the invention has for its object to provide a cooling device with a corresponding contact area and the design of the contact area in systems in which an icing effectively, environmentally friendly and can be prevented without much effort.
  • the cooling device for cooling a moisture-containing environment by means of thermal energy transport, in particular in the manner of an evaporator, heat exchanger or the like, has at least one contact region, which is exposed to the environment to transport heat energy.
  • the contact region is formed at least partially with a freezing point of the moisture-lowering coating in order to avoid freezing of the moisture from the environment or at least reduce.
  • the coating consists at least partially of a polymer which effects a thermal hysteresis in contact with the moisture.
  • Thermal hysteresis in the context of the invention refers to a temperature difference between a freezing point and a melting point. In other words, a freezing point is lowered in contact with the polymer, for example, but not a melting point of the liquid.
  • a polymer is, for example, polyvinyl alcohol. Suitable polymers are described for example in the publication " Renewable Energys "of November 2007 or” SMM Materials Technology "No. 10-2007 , the contents of which are hereby incorporated by reference.
  • the thermal hysteresis is such that the liquid moisture freezes at a freezing point and the frozen moisture melts at a melting point, wherein between freezing point and melting point, a temperature difference of about greater than 0.5 K. , preferably of about greater than or equal to 1.0 K, and most preferably of greater than or equal to 1.5K.
  • the melting point is preferably at least about 0.5 K above freezing.
  • the contact region at least partially comprises means for removing the liquid moisture.
  • the means may be at least partially designed as a lamellar arrangement.
  • these means are at least partially formed as a hydrophobic layer.
  • a further exemplary embodiment provides that the contact region is coated both with the coating that lowers the freezing point of the moisture and with the hydrophobic layer.
  • the freezing-point lowering coating and the hydrophobic layer may alternately be formed in a pattern-like manner selected from the group of patterns comprising checkerboard patterns, line patterns, checker patterns, longitudinal stripe patterns, horizontal stripe patterns, donut patterns, and the like.
  • the contact area is formed as an evaporator surface, as a heat exchanger surface or the like.
  • a freezing point reducing coating for a contact area of a thermal energy transfer surface wherein the contact area is formed at least partially with the one freezing point of the moisture lowering coating in order to avoid or at least reduce freezing of the moisture from the environment, provides an application in: an evaporator, a heat exchanger, a ventilation system, in particular a home ventilation system, an air conditioner, in particular an automotive air conditioning system, a refrigerator, a freezer, a heat pump and the like.
  • the icing of evaporators and other refrigerators is shifted toward lower temperatures and reduced in terms of the amount of icing.
  • This also applies to heat exchangers which are exposed to air on one or more sides, for example in residential ventilation systems.
  • Due to the versatile use icing can also be reduced or avoided in motor vehicle air conditioning systems, whereby in such motor vehicle air conditioning systems the air has only been cooled down to temperatures just above the freezing point in order to prevent icing there.
  • a deeper cooling can be realized, whereby a faster cooling down of the passenger compartment is made possible.
  • when used on refrigerators can effectively prevent icing on the inner walls of the refrigerator.
  • the effectiveness of the individual layers in combination can be further enhanced.
  • the fact that the hydrophobic layer facilitates flow the first ice formation can be entrained by means of the effluent water at the beginning of ice formation.
  • the freezing point reducing layer allows freezing to be reduced to lower temperatures. In combination of the two layers, an ice deposit can be further reduced.
  • the drawing illustrates an embodiment of the invention and shows in a single figure schematically an air side of a cooling device.
  • the cooling device 1 is presently designed as an evaporator. Shown in the view formed as an air side 2 of the evaporator contact area, which is exposed to the environment, so contacted an ambient air.
  • the ambient air contains moisture.
  • the air side 2 has on the surface facing the environment to a freezing point of the moisture of the air lowering coating 3.
  • the coating 3 is presently designed as a so-called antifreeze polymer layer. Depending on the choice of the polymer, the coating 3 causes at temperatures up to about - 3 ° C no ice layer on the air side 2 of the evaporator 1, that is the contact area, but at most a water film. Water possibly freezing on the water film can thus slide off with the water film.
  • the evaporator 1 is further advantageously designed so that a condensate takes place at least for the most part.
  • the air side 2 is formed as a vertical wall in the present case. Alternatively, a suitable fin arrangement may be formed.
  • the air side 2 is further coated with a hydrophobic layer 4 in the illustrated embodiment.
  • the coatings 3, 4 alternate alternately.
  • the coatings 3, 4 may be spaced apart from one another, as shown in the figure, or be formed adjacent to each other. In this way, a line pattern with hydrophobic layer 4 and Freezing point reducing layer 3 formed on the air side 2.
  • the running on the hydrophobic layer 4 water takes the water on the freezing point reducing layer 3 with. As a result, the freezing, for example, remaining residual water is significantly reduced.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
EP09166670A 2008-08-05 2009-07-29 Dispositif de refroidissement présentant un risque de givre réduit Withdrawn EP2151656A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008036492 2008-08-05

Publications (1)

Publication Number Publication Date
EP2151656A1 true EP2151656A1 (fr) 2010-02-10

Family

ID=41278520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09166670A Withdrawn EP2151656A1 (fr) 2008-08-05 2009-07-29 Dispositif de refroidissement présentant un risque de givre réduit

Country Status (2)

Country Link
EP (1) EP2151656A1 (fr)
DE (1) DE202008017545U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3832241A1 (fr) * 2019-12-02 2021-06-09 Chart Inc. Evaporateur chauffé par l'air avec traitement glace-/hydrophobique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009035453A1 (de) * 2009-07-17 2011-01-20 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
DE102011102216A1 (de) * 2011-05-21 2012-11-22 Franz Hegele Eisspeicher
DE102018214890A1 (de) * 2018-08-31 2020-03-05 Bayerische Motoren Werke Aktiengesellschaft Klimatisierungseinrichtung für einen Innenraum eines Kraftfahrzeugs sowie Verfahren zum Betreiben einer Klimatisierungseinrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05202313A (ja) * 1992-01-24 1993-08-10 Kansai Paint Co Ltd 親水化処理剤
EP1154042A1 (fr) * 2000-05-12 2001-11-14 Nippon Paint Co., Ltd. Procédé pour fabriquer un échangeur de chaleur hydrophyle et échangeur de chaleur obtenu
US6337129B1 (en) * 1997-06-02 2002-01-08 Toto Ltd. Antifouling member and antifouling coating composition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05202313A (ja) * 1992-01-24 1993-08-10 Kansai Paint Co Ltd 親水化処理剤
US6337129B1 (en) * 1997-06-02 2002-01-08 Toto Ltd. Antifouling member and antifouling coating composition
EP1154042A1 (fr) * 2000-05-12 2001-11-14 Nippon Paint Co., Ltd. Procédé pour fabriquer un échangeur de chaleur hydrophyle et échangeur de chaleur obtenu

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ERNEUERBARE ENERGIEN, November 2007 (2007-11-01)
SMM WERKSTOFFTECHNIK, 2007

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3832241A1 (fr) * 2019-12-02 2021-06-09 Chart Inc. Evaporateur chauffé par l'air avec traitement glace-/hydrophobique

Also Published As

Publication number Publication date
DE202008017545U1 (de) 2009-12-24

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