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WO2013076004A2 - Évaporateur pour appareil de froid et appareil de froid - Google Patents

Évaporateur pour appareil de froid et appareil de froid Download PDF

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Publication number
WO2013076004A2
WO2013076004A2 PCT/EP2012/072754 EP2012072754W WO2013076004A2 WO 2013076004 A2 WO2013076004 A2 WO 2013076004A2 EP 2012072754 W EP2012072754 W EP 2012072754W WO 2013076004 A2 WO2013076004 A2 WO 2013076004A2
Authority
WO
WIPO (PCT)
Prior art keywords
evaporator
heating
heating foil
foil
power
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.)
Ceased
Application number
PCT/EP2012/072754
Other languages
German (de)
English (en)
Other versions
WO2013076004A3 (fr
Inventor
Rainer Weser
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to EP12790851.5A priority Critical patent/EP2783173A2/fr
Priority to CN201280057525.8A priority patent/CN104364596B/zh
Publication of WO2013076004A2 publication Critical patent/WO2013076004A2/fr
Publication of WO2013076004A3 publication Critical patent/WO2013076004A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • 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
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating

Definitions

  • the present invention relates to an evaporator for a refrigerator and a refrigerator with a corresponding evaporator.
  • Evaporators of refrigerators are commonly provided with heaters to convert frost and ice, which has deposited in the operation of the evaporator on this, in water. This water then evaporates or is discharged from the device.
  • Defrost heaters for finned evaporators of refrigerators are widely used as pipe heaters with heating coils introduced in metal pipes or as radiant heaters.
  • the evaporator continues to be heated after the end of the change in state of aggregation (ice to water), the evaporator temperature rises, in particular also at points which have already defrosted. This unnecessarily energy is introduced into the evaporator. This additionally introduced amount of energy must then be transported out of the refrigeration device (with the efficiency of the refrigeration cycle).
  • the defrosting process is carried out until a temperature sensor has reached a preset limit.
  • the introduced energy is spatially distributed in the thawed evaporator according to the heating capacity of the defrost heater.
  • a demand-dependent, i. Spatially dependent on the degree of tire / icing energy supply for the defrosting process is not given.
  • an inventive evaporator for a refrigerator is at least partially coated with a heating foil whose electrical internal resistance increases with increasing temperature.
  • the heating foil can be provided in different thicknesses of less than one millimeter to several millimeters thick. Because the areas on the evaporator, which have already defrosted, are warming up, the heating temperature of the heating foil drops there, which leads to a lower energy input into these areas. This can reduce energy consumption.
  • the heating foil is designed, for example, as a PTC heating foil.
  • a PTC heating foil is based on a PTC resistor, which can conduct the current better at lower temperatures than at high temperatures.
  • the electrical resistance increases with increasing temperature. Because the already defrosted areas heat up, the electrical resistance of the heating foil rises there and the heating power drops partially. In these areas now only less energy is introduced. If the entire evaporator defrosted, the resistance of the heating foil, for example, rises to a known final value.
  • the evaporator according to the invention allows an increase in efficiency during defrosting. Energy consumption can be reduced.
  • the demand-dependent defrosting results in shorter defrosting times. Due to the PTC characteristic, the system is intrinsically safe and protected against overheating. This eliminates the need for an additional temperature monitor.
  • the use of a flat foil-like heating element results in a flat design. As a result, the air flow on the evaporator is virtually unaffected. Installation is easy because no coils need to be pressed into the evaporator.
  • the evaporator is designed as a fin evaporator.
  • the air flow to be cooled is passed through the lamellar body or past it and thereby the heat is transferred to the evaporator.
  • the finned evaporator has, for example, at least one refrigerant-carrying tube, on which a lamellar body is arranged.
  • the tube is typically pressed into the lamellar body, or connected thereto, for example by gluing or by means of a solder connection.
  • the solder joint offers a particularly good Heat transfer between the pipe and the lamellar body.
  • the adhesive connection allows a simple cost-effective implementation.
  • the tube may for example be enclosed at least in sections by the lamellar body, ie extend there within the lamellar body. As a result, a stable attachment to the tube and at the same time a particularly good heat transfer between the tube and the lamella body is achieved.
  • the power supply lines of the heating foil are essentially made of copper or aluminum. Copper has the higher thermal conductivity. Aluminum offers material cost benefits and is also more corrosion resistant.
  • the heating foil is glued, soldered or mechanically contacted to the evaporator, e.g. pressed.
  • heat-conducting pads for compensating for unevenness and for improving the heat transfer can also be arranged between the evaporator and the heating foil.
  • the heating foil has a plurality of heating regions, which can be heated with a different power. This allows heating adapted to the geometry of the evaporator. Particularly icing areas can be heated more intensively with a more powerful heating area.
  • the energy consumption can be further reduced, since only at critical points a particularly high heating power needs to be provided.
  • the heating temperature of the heating areas for example, can be regulated separately. This results in a particularly good adaptation to the needs.
  • the heating foil can be adapted to the geometry of different evaporators or different refrigerators.
  • a method according to the invention for operating the evaporator with the heating foil has the method steps of heating the evaporator by means of the heating foil, measuring the current consumption of the heating foil and reducing the heating power or switching off the heating foil when the current consumption drops below a minimum value. Due to the PTC characteristic of the heating foil, its current consumption decreases with increasing temperature. As a result, the temperature of the heating foil can be determined indirectly via the current consumption and the heating power of the heating foil can be controlled. According to one embodiment, the heating power of the heating foil is controlled separately at different heating areas. In this case, for example, the power consumption of several heating areas is determined separately. This allows for the geometry of the evaporator and the ambient conditions adapted heating of the evaporator. Different areas of the evaporator can be heated differently depending on requirements. In areas that heat up slightly, less energy can be supplied. Energy consumption can be reduced by avoiding unnecessarily high heating of easily heated areas.
  • the evaporator is at least partially coated on both sides with the heating foil. It is then possible, for example, to heat the heating areas on both sides of the evaporator with the same heating power. If the evaporator is partially constructed with surface symmetry relative to the heating areas on both sides, the control can be simplified because the heating requirements of the opposite areas are similar.
  • An inventive refrigeration device has a refrigerant circuit which includes an evaporator according to the invention.
  • the refrigerant circuit comprises, for example, a compressor for compressing refrigerant vapor, a condenser downstream of the compressor for condensing the refrigerant vapor, and the evaporator connected downstream of the condenser and upstream of the compressor for vaporizing the liquefied refrigerant.
  • a refrigeration appliance is understood in particular to be a household refrigeration appliance, that is to say a refrigeration appliance used for household purposes or possibly even in the gastronomy sector, and in particular for storing food and / or beverages in household quantities at specific temperatures, such as, for example, a refrigerator, a freezer , a fridge freezer, a freezer or a wine storage cabinet.
  • FIG. 1 shows a schematic representation of a section of a refrigeration device with an evaporator according to an exemplary embodiment.
  • the refrigeration device 10 has adeguthunt 13, which is shown here rectangular.
  • a platinum-type executed evaporator 1 is arranged, which is shown here in the picture in the right area ofdeguthunt 13.
  • the evaporator 1 is arranged close to the wall in the refrigerated goods chamber 13 and is held by a holding element 15.
  • the evaporator 1 has an inner refrigerant pipe 5, in this case a copper pipe, and an aluminum disk body 7 arranged thereon.
  • the evaporator 1 may also be made entirely of copper, aluminum or another suitable material.
  • the evaporator 1 is coated in this embodiment, on its left side in the picture with a heating foil 3, the electrical internal resistance increases with increasing temperature.
  • the heating foil 3 has two heating regions 9, which can be regulated separately in the heating temperature. Due to the fact that the areas on the evaporator 1, which are already defrosted, are heated, the heating temperature of the heating foil 3 drops there, which leads to a lower energy input into these areas. This can reduce energy consumption.
  • the heating foil 3 is designed as a PTC heating foil.
  • the electrical resistance of the heating foil 3 increases as the temperature of the heating foil 3 increases.
  • the resistance of the heating foil 3 and the heat rises there Heating power drops partially. In these areas now only less energy is introduced. If the entire evaporator 1 is defrosted, the resistance of the heating foil 3 rises to a known final value.
  • the evaporator 1 according to the invention enables an increase in efficiency during defrosting. Energy consumption can be reduced. The demand-dependent defrosting results in shorter defrosting times. By providing a plurality of separately controllable heating areas 9, the energy consumption can be further reduced, since specifically at certain required locations of the evaporator 1 a particularly high heating power can be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Defrosting Systems (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Removal Of Water From Condensation And Defrosting (AREA)
  • Resistance Heating (AREA)

Abstract

La présente invention concerne un évaporateur (1) pour un appareil de froid et un appareil de froid équipé d'un évaporateur (1) de ce type. Ledit évaporateur (1) est recouvert, au moins par endroits, d'un film chauffant (3) électrique dont la résistance électrique interne augmente en cas d'augmentation de la température.
PCT/EP2012/072754 2011-11-24 2012-11-15 Évaporateur pour appareil de froid et appareil de froid Ceased WO2013076004A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12790851.5A EP2783173A2 (fr) 2011-11-24 2012-11-15 Évaporateur pour appareil de froid et appareil de froid
CN201280057525.8A CN104364596B (zh) 2011-11-24 2012-11-15 用于制冷器具的蒸发器和制冷器具

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011087029.6 2011-11-24
DE201110087029 DE102011087029A1 (de) 2011-11-24 2011-11-24 Verdampfer für ein Kältegerät und Kältegerät

Publications (2)

Publication Number Publication Date
WO2013076004A2 true WO2013076004A2 (fr) 2013-05-30
WO2013076004A3 WO2013076004A3 (fr) 2013-09-26

Family

ID=47222063

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/072754 Ceased WO2013076004A2 (fr) 2011-11-24 2012-11-15 Évaporateur pour appareil de froid et appareil de froid

Country Status (4)

Country Link
EP (1) EP2783173A2 (fr)
CN (1) CN104364596B (fr)
DE (1) DE102011087029A1 (fr)
WO (1) WO2013076004A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3031803A1 (fr) * 2015-01-21 2016-07-22 Valeo Systemes Thermiques Echangeur de chaleur et dispositif de conditionnement thermique pour vehicule automobile comportant un tel echangeur
US9537556B2 (en) 2014-07-11 2017-01-03 Huawei Technologies Canada Co., Ltd. Systems and methods for optimized beamforming and compression for uplink MIMO cloud radio access networks

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015008041A1 (de) * 2015-06-23 2016-12-29 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB820908A (en) * 1957-04-02 1959-09-30 Andrew George Heron Improvements in or relating to refrigerating apparatus
FI49222C (fi) * 1973-12-12 1975-04-10 Rosenlew Ab Oy W Jäänsulatusväline pakastuskaappia varten.
US4432211A (en) * 1980-11-17 1984-02-21 Hitachi, Ltd. Defrosting apparatus
DE19948534A1 (de) * 1999-10-08 2001-04-19 Messer Ags Gmbh Zusatzheizung zum Abtauen von Eis für Druckaufbauverdampfer
ITVE20010033A1 (it) * 2001-07-17 2003-01-17 Alper Srl Dispositivo per il rapido sbrinamento di evaporatori
ITVE20050033U1 (it) * 2005-10-20 2007-04-21 I R C A S P A Ind Resistenze Evaporatore a lamelle per impianti refrigeranti provvisto di dispositivo per effettuare lo sbrinamento.
CN2921730Y (zh) * 2005-11-30 2007-07-11 东莞市广大制冷有限公司 具有除霜装置的蒸发器
JP2008157520A (ja) * 2006-12-22 2008-07-10 Matsushita Electric Ind Co Ltd 冷蔵庫
JP2010210211A (ja) * 2009-03-12 2010-09-24 Mitsubishi Electric Corp 冷凍装置
KR20100120253A (ko) * 2009-05-05 2010-11-15 엘지전자 주식회사 냉장고
CN201731687U (zh) * 2009-11-26 2011-02-02 林向前 低温实验设备用复合型蒸发器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9537556B2 (en) 2014-07-11 2017-01-03 Huawei Technologies Canada Co., Ltd. Systems and methods for optimized beamforming and compression for uplink MIMO cloud radio access networks
FR3031803A1 (fr) * 2015-01-21 2016-07-22 Valeo Systemes Thermiques Echangeur de chaleur et dispositif de conditionnement thermique pour vehicule automobile comportant un tel echangeur
WO2016116462A1 (fr) * 2015-01-21 2016-07-28 Valeo Systemes Thermiques Echangeur de chaleur et dispositif de conditionnement thermique pour véhicule automobile comportant un tel échangeur

Also Published As

Publication number Publication date
CN104364596A (zh) 2015-02-18
DE102011087029A1 (de) 2013-05-29
EP2783173A2 (fr) 2014-10-01
CN104364596B (zh) 2017-03-08
WO2013076004A3 (fr) 2013-09-26

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