EP2304354B1 - A method for making a cooling device - Google Patents

A method for making a cooling device Download PDF

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Publication number
EP2304354B1
EP2304354B1 EP09738039.8A EP09738039A EP2304354B1 EP 2304354 B1 EP2304354 B1 EP 2304354B1 EP 09738039 A EP09738039 A EP 09738039A EP 2304354 B1 EP2304354 B1 EP 2304354B1
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EP
European Patent Office
Prior art keywords
cover
air channel
air
fresh food
polyurethane material
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.)
Active
Application number
EP09738039.8A
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German (de)
French (fr)
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EP2304354A2 (en
Inventor
Veysi Ercan
Goksin Sayer
M. Cemal Hacioglu
Yuksel Atilla
Suat Yuksel
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.)
Arcelik AS
Original Assignee
Arcelik AS
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Publication date
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Publication of EP2304354A2 publication Critical patent/EP2304354A2/en
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Publication of EP2304354B1 publication Critical patent/EP2304354B1/en
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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
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
    • F25D17/065—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators with compartments at different temperatures
    • 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
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • F25D17/045—Air flow control arrangements
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/067—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by air ducts

Definitions

  • the present invention relates to a method of making a cooling device comprising a cover whereof the side facing the fresh food compartment is insulated.
  • cooling devices there are at least two compartments, generally one being a fresh food and the other a freezer, which are kept at different temperatures from each other.
  • the fresh food compartment is allocated for storing foods such as fruits and vegetables and the temperature is kept around 5°C.
  • the freezer compartment with a temperature around -18°C, foods such as meat and fish are placed that have to be stored for a longer time.
  • the evaporator in the freezer compartment forming the coldest place of the cooling device, is used.
  • the evaporator maintains to cool the hot air aspirated from the fresh food compartment and at the same time to hold the moisture contained in the hot air.
  • an air channel is provided with air blowing holes arranged thereon, for conveying the air activated by the fan into the fresh food compartment.
  • Thermostats for adjusting the temperatures of the fresh food and freezer compartments and a valve for controlling the air flow by changing the cross section of the air channel are disposed inside the air channel.
  • the valve and the thermostat are situated inside the air channel and safeguarded by a cover. The cover separates the air channel and the fresh food compartment and a knob is placed thereon so that the user can adjust the valve and/or the thermostat from inside the fresh food compartment.
  • the insulation of particularly the cover that houses the damper thermostat is tried to be accomplished by applying styrofoam material on the inner wall.
  • styrofoam material on the inner wall of the damper thermostat cover that having particularly intended surfaces, a desired configuration without any gap therebetween itself and the surface.
  • a gap remains between the styrofoam material and the cover surface, cold air seeps into these gaps. Accordingly, condensation appears on the cover surface, particularly on the side facing the fresh food compartment, since the side of the cover facing the air channel is in contact with cold air and the side facing the fresh food compartment is in contact with relatively hotter air.
  • a heater is disposed in contact with the surface of the cover facing the air channel. In this implementation, disposing styrofoam and heater on the cover increases both labor and costs and also the energy consumption.
  • AU452338 B2 discloses the use of expanded polyurethane insulation slabs in a housing of an evaporator.
  • the polyurethane insulation slabs are enclosed by outer moulded fibreglass casings.
  • EP0982553 A2 discloses a refrigerator having a housing installed at the centre of the rear wall of an refrigeration compartment, wherein a guide path is formed in the upper end of the housing for guiding cool air produced from an evaporator into the refrigeration compartment.
  • a damper for controlling the amount of cool air provided to the refrigeration compartment by opening/closing the guide path and a damper motor for driving the damper are built in the upper end of the housing. Temperature in the refrigeration compartment is controlled by using these constituents in a conventional manner.
  • a damper cover is incorporated in a front plate of the embodiment and a spacer is formed of an insulation material. The spacer is made thick to prevent condensation on the damper cover which results from a large amount of cool air passing through guide path.
  • DE4420149 A1 discloses a refrigerating system having an isolating panel with integrated cooling elements.
  • a cover plate for an evaporator bears a fan.
  • the cover plate is comprised of an isolating body enclosed by metal or plastics material. The isolating body helps avoiding condensation at the rear surface of the cover plate (with regard to evaporator).
  • US3280583 A discloses the use of an insulating evaporator housing in a refrigerator wherein for thermal insulation, a foamed polystyrene is foreseen.
  • a foamed polystyrene is foreseen.
  • polyurethane foam in which the foam cells are filled with a gas having a higher insulation value than air.
  • the aim of the present invention is the realization of a method for making a cooling device comprising a cover wherein condensation is prevented on the surface thereof facing the fresh food compartment.
  • the method for making a cooling device realized in order to attain the aim of the present invention is explicated in the claim.
  • the cooling device comprises a cover, fitted over the air channel in the fresh food compartment, the surface thereof facing inside the air channel is entirely clad by polyurethane material, safeguarding the thermostat and the shutter disposed in the air channel, and a knob mounted thereon for controlling the thermostat and the shutter.
  • the surface of the cover forming an intermediate surface where the cold and hot air meet, facing inside the air channel, is insulated such that no gap is left therebetween the insulation material and the surface wall.
  • the polyurethane material due to its feature, takes the shape of the mould and hence the shape of the cover by expanding and solidifying inside the mould and adheres to the surface of the cover facing the air channel without any gaps therebetween.
  • the surface of the cover having surfaces forming intermediate surfaces where cold air and hot air meet inside the compartment, safeguarding for example the damper thermostat disposed inside the air channel, is effectively insulated.
  • the use of a heater is not necessary, maintaining savings in cost, labor, and energy.
  • the cooling device (1) produced according to the method of the present invention comprises a freezer compartment (2) wherein foods to be frozen are placed, a fresh food compartment (3), kept at a higher temperature than the freezer compartment (2), wherein foodstuffs to be cooled are emplaced, at least one evaporator (4) for cooling the air circulated in the compartments (2, 3) one or more fans (5) for activating the air cooled by the evaporator (4), an air channel (7) for delivering the air activated by the fan (5) into the fresh food compartment (3), one or more thermostats (10) disposed inside the air channel (7) for regulating the temperatures of the compartments (2, 3), a shutter (9) that controls the air flow by changing the cross section of the air channel (7), a cover (6) that safeguards the shutter (9) and the thermostat (10), fitted over the air channel (7) in the fresh food compartment (3), such that one side faces the air channel (7) and the other side the fresh food compartment (3), and a knob (8) mounted on the cover (6) so that the user can adjust the shutter (9)
  • the surface of the cover (6) facing the air channel (7) and in contact with the cold air passing through the air channel (7) is clad by polyurethane material, taking the shape of the said surface and without a gap between itself and the said surface ( Figure 1 and Figure 2 ).
  • the formation of condensation on the surface of the cover (6) facing inside of the fresh food compartment (3) and contacting with relatively hotter air is prevented.
  • the polyurethane material adheres on the cover (6), preferably made of plastic, by itself.
  • the use of a heater for preventing condensation is not necessary since the polyurethane material adheres to the cover (6) surface and entirely takes the shape of the surface.
  • mounting the polyurethane material on the surface does not require additional time and labor consumption.
  • the thermostat (10) is a damper thermostat and directly controls the shutter (9) that changes the cross section of the air channel (7).
  • the cover (6) is produced from polyurethane material.
  • the side of the cover (6) facing inside the air channel (7) is made directly from polyurethane material.
  • polyurethane material is poured into the mould and the mould is closed. The polyurethane material taking the shape of the mould and hence the shape of the cover (6) by expanding and solidifying inside the mould is taken out and is mounted over the air channel (7) in the fresh food compartment (3).
  • the outer surface of the polyurethane material taken out of the mould is painted.
  • the surface of the mould is painted in any color desired.
  • polyurethane material is poured into the mould and the mould is closed.
  • the polyurethane material taking the shape of the mould and hence the shape of the cover (6) by expanding and solidifying inside the mould is taken out with the side facing the fresh food compartment (3) painted.
  • the cover (6) that is subsequently mounted on the air channel (7) in the fresh food compartment (3), and having particularly indented surfaces, is insulated without any gaps between the polyurethane material and the cover (6) as a result of cladding the side thereof facing the air channel (7) by polyurethane material. Accordingly, formation of condensation on the cover (6) surface facing the fresh food compartment (3) is prevented. This removes the necessity of heater usage thereby maintaining savings in cost, labor, and energy.

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  • 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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Description

  • The present invention relates to a method of making a cooling device comprising a cover whereof the side facing the fresh food compartment is insulated.
  • In cooling devices, there are at least two compartments, generally one being a fresh food and the other a freezer, which are kept at different temperatures from each other. The fresh food compartment is allocated for storing foods such as fruits and vegetables and the temperature is kept around 5°C. In the freezer compartment, with a temperature around -18°C, foods such as meat and fish are placed that have to be stored for a longer time.
  • Foods of various types placed particularly in the fresh food compartment and the opening, closing of the fresh food and freezer compartment doors during the course of the day affect the humidity value of the air circulating in the compartment. In order to remove the moisture from air, the evaporator in the freezer compartment, forming the coldest place of the cooling device, is used. The evaporator maintains to cool the hot air aspirated from the fresh food compartment and at the same time to hold the moisture contained in the hot air.
  • In this type of cooling devices, an air channel is provided with air blowing holes arranged thereon, for conveying the air activated by the fan into the fresh food compartment. Thermostats for adjusting the temperatures of the fresh food and freezer compartments and a valve for controlling the air flow by changing the cross section of the air channel are disposed inside the air channel. The valve and the thermostat are situated inside the air channel and safeguarded by a cover. The cover separates the air channel and the fresh food compartment and a knob is placed thereon so that the user can adjust the valve and/or the thermostat from inside the fresh food compartment.
  • In state of the art embodiments, the insulation of particularly the cover that houses the damper thermostat is tried to be accomplished by applying styrofoam material on the inner wall. However, it is not possible to entirely adhere the styrofoam material on the inner wall of the damper thermostat cover that having particularly intended surfaces, a desired configuration without any gap therebetween itself and the surface. When a gap remains between the styrofoam material and the cover surface, cold air seeps into these gaps. Accordingly, condensation appears on the cover surface, particularly on the side facing the fresh food compartment, since the side of the cover facing the air channel is in contact with cold air and the side facing the fresh food compartment is in contact with relatively hotter air. In order to prevent this, a heater is disposed in contact with the surface of the cover facing the air channel. In this implementation, disposing styrofoam and heater on the cover increases both labor and costs and also the energy consumption.
  • In the state of the art Japanese Patent Applications No JP4359779 and JP10176880 , refrigerators are explained wherein the switching chambers are insulated.
  • AU452338 B2 discloses the use of expanded polyurethane insulation slabs in a housing of an evaporator. The polyurethane insulation slabs are enclosed by outer moulded fibreglass casings.
  • EP0982553 A2 discloses a refrigerator having a housing installed at the centre of the rear wall of an refrigeration compartment, wherein a guide path is formed in the upper end of the housing for guiding cool air produced from an evaporator into the refrigeration compartment. A damper for controlling the amount of cool air provided to the refrigeration compartment by opening/closing the guide path and a damper motor for driving the damper are built in the upper end of the housing. Temperature in the refrigeration compartment is controlled by using these constituents in a conventional manner. A damper cover is incorporated in a front plate of the embodiment and a spacer is formed of an insulation material. The spacer is made thick to prevent condensation on the damper cover which results from a large amount of cool air passing through guide path.
  • DE4420149 A1 discloses a refrigerating system having an isolating panel with integrated cooling elements. A cover plate for an evaporator bears a fan. The cover plate is comprised of an isolating body enclosed by metal or plastics material. The isolating body helps avoiding condensation at the rear surface of the cover plate (with regard to evaporator).
  • US3280583 A discloses the use of an insulating evaporator housing in a refrigerator wherein for thermal insulation, a foamed polystyrene is foreseen. Alternatively, there might be polyurethane foam in which the foam cells are filled with a gas having a higher insulation value than air.
  • The aim of the present invention is the realization of a method for making a cooling device comprising a cover wherein condensation is prevented on the surface thereof facing the fresh food compartment.
  • The method for making a cooling device realized in order to attain the aim of the present invention is explicated in the claim. The cooling device comprises a cover, fitted over the air channel in the fresh food compartment, the surface thereof facing inside the air channel is entirely clad by polyurethane material, safeguarding the thermostat and the shutter disposed in the air channel, and a knob mounted thereon for controlling the thermostat and the shutter.
  • Thus, the surface of the cover, forming an intermediate surface where the cold and hot air meet, facing inside the air channel, is insulated such that no gap is left therebetween the insulation material and the surface wall. The polyurethane material, due to its feature, takes the shape of the mould and hence the shape of the cover by expanding and solidifying inside the mould and adheres to the surface of the cover facing the air channel without any gaps therebetween.
  • By means of the present invention, the surface of the cover, having surfaces forming intermediate surfaces where cold air and hot air meet inside the compartment, safeguarding for example the damper thermostat disposed inside the air channel, is effectively insulated. As a result, the use of a heater is not necessary, maintaining savings in cost, labor, and energy.
  • A cooling device realized by the method attaining the aim of the present invention is illustrated in the attached figures, where:
    • Figure 1 - is the front view of a cooling device.
    • Figure 2 - is the A-A cross sectional view of Figure 1.
  • The elements illustrated in the figures are numbered as follows:
    1. 1. Cooling device
    2. 2. Freezer compartment
    3. 3. Fresh food compartment
    4. 4. Evaporator
    5. 5. Fan
    6. 6. Cover
    7. 7. Air channel
    8. 8. Knob
    9. 9. Shutter
    10. 10. Thermostat
  • The cooling device (1) produced according to the method of the present invention comprises a freezer compartment (2) wherein foods to be frozen are placed, a fresh food compartment (3), kept at a higher temperature than the freezer compartment (2), wherein foodstuffs to be cooled are emplaced, at least one evaporator (4) for cooling the air circulated in the compartments (2, 3) one or more fans (5) for activating the air cooled by the evaporator (4), an air channel (7) for delivering the air activated by the fan (5) into the fresh food compartment (3), one or more thermostats (10) disposed inside the air channel (7) for regulating the temperatures of the compartments (2, 3), a shutter (9) that controls the air flow by changing the cross section of the air channel (7), a cover (6) that safeguards the shutter (9) and the thermostat (10), fitted over the air channel (7) in the fresh food compartment (3), such that one side faces the air channel (7) and the other side the fresh food compartment (3), and a knob (8) mounted on the cover (6) so that the user can adjust the shutter (9) and/or the thermostat (10) from inside the fresh food compartment (3).
  • The surface of the cover (6) facing the air channel (7) and in contact with the cold air passing through the air channel (7) is clad by polyurethane material, taking the shape of the said surface and without a gap between itself and the said surface (Figure 1 and Figure 2).
  • While the polyurethane material cladding is made, the side of the cover (6) that will face inside the fresh food compartment (3) is placed on the mould. The polyurethane material is poured on the inner wall of this surface and the mould is closed. The polyurethane material takes the shape of the mould and hence the shape of the cover (6) surface by expanding and solidifying inside the mould. This process prevents any gap remaining between the polyurethane material used as insulation material and the cover (6) surface. Any formation of condensation on the cover (6) surface is prevented since the heat insulation of polyurethane material is better and since there isn't any gap left between the polyurethane material and the cover (6) surface. Because the contact of cold air with the surface of the cover (6) facing the air channel (7) is prevented. Accordingly, the formation of condensation on the surface of the cover (6) facing inside of the fresh food compartment (3) and contacting with relatively hotter air is prevented. Besides, the polyurethane material adheres on the cover (6), preferably made of plastic, by itself. The use of a heater for preventing condensation is not necessary since the polyurethane material adheres to the cover (6) surface and entirely takes the shape of the surface. Furthermore, mounting the polyurethane material on the surface does not require additional time and labor consumption.
  • In another embodiment, the thermostat (10) is a damper thermostat and directly controls the shutter (9) that changes the cross section of the air channel (7).
  • In the present invention, the cover (6) is produced from polyurethane material. Thus, the side of the cover (6) facing inside the air channel (7) is made directly from polyurethane material. In this embodiment, polyurethane material is poured into the mould and the mould is closed. The polyurethane material taking the shape of the mould and hence the shape of the cover (6) by expanding and solidifying inside the mould is taken out and is mounted over the air channel (7) in the fresh food compartment (3).
  • In yet another embodiment of the present invention, the outer surface of the polyurethane material taken out of the mould is painted. In this embodiment of the present invention, the surface of the mould is painted in any color desired. Afterwards, polyurethane material is poured into the mould and the mould is closed. The polyurethane material taking the shape of the mould and hence the shape of the cover (6) by expanding and solidifying inside the mould is taken out with the side facing the fresh food compartment (3) painted. By painting the surface of the mould and this paint painting the outer surface of the polyurethane provides a smoother appearance.
  • By means of the present invention, the cover (6) that is subsequently mounted on the air channel (7) in the fresh food compartment (3), and having particularly indented surfaces, is insulated without any gaps between the polyurethane material and the cover (6) as a result of cladding the side thereof facing the air channel (7) by polyurethane material. Accordingly, formation of condensation on the cover (6) surface facing the fresh food compartment (3) is prevented. This removes the necessity of heater usage thereby maintaining savings in cost, labor, and energy.

Claims (1)

  1. A method for making a cooling device (1), the cooling device comprising a freezer compartment (2) wherein foods to be frozen are placed,
    a fresh food compartment (3), kept at a higher temperature than the freezer compartment (2), wherein foodstuffs to be cooled are emplaced,
    at least one evaporator (4) for cooling the air circulated in the compartments (2, 3), one or more fans (5) for activating the air cooled by the evaporator (4),
    an air channel (7) for delivering the air activated by the fan (5) into the fresh food compartment (3),
    one or more thermostats (10) disposed inside the air channel (7) for regulating the temperatures of the compartments (2, 3),
    a shutter (9) that controls the air flow by changing the cross section of the air channel (7),
    a cover (6) that safeguards the shutter (9) and the thermostat (10), wherein the cover (6) is fitted over the air channel (7) in the fresh food compartment (3), such that one side of the cover (6) faces the air channel (7) and the other side of the cover (6) faces the fresh food compartment (3), wherein the cover (6) has a surface facing the air channel (7) and in contact with the cold air passing through the air channel (7) and clad by polyurethane material, wherein the polyurethane material takes the shape of the said surface without leaving a gap between the polyurethane material and the said surface and
    a knob (8) mounted on the cover (6) so that the user can adjust the shutter (9) and the thermostat (10),
    the method comprising the steps of
    - placing the surface of the cover (6) that will face inside the fresh food compartment (3) on a mould,
    - pouring the polyurethane material on the inner wall of this surface,
    - closing the mould such that the polyurethane material takes the shape of the mould and hence the shape of the cover (6) surface by expanding and solidifying inside the mould.
EP09738039.8A 2008-05-02 2009-04-22 A method for making a cooling device Active EP2304354B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200803071 2008-05-02
PCT/EP2009/054765 WO2009132995A2 (en) 2008-05-02 2009-04-22 A cooling device

Publications (2)

Publication Number Publication Date
EP2304354A2 EP2304354A2 (en) 2011-04-06
EP2304354B1 true EP2304354B1 (en) 2016-03-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09738039.8A Active EP2304354B1 (en) 2008-05-02 2009-04-22 A method for making a cooling device

Country Status (2)

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EP (1) EP2304354B1 (en)
WO (1) WO2009132995A2 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3280583A (en) * 1965-05-12 1966-10-25 Gen Electric Combination refrigerator
AU452338B2 (en) * 1970-10-21 1974-09-05 Email Limited Refrigeration apparatus
JPH04359779A (en) * 1991-06-06 1992-12-14 Hitachi Ltd Refrigerator
DE4420149A1 (en) * 1994-06-09 1995-12-14 Josef Huemer Refrigerator installation with integral construction refrigerant panels
DE69524717T2 (en) * 1994-11-30 2002-06-13 Samsung Electronics Co., Ltd. Method for regulating the temperature of a refrigerator by regulating the outlet direction of the cooling air
JP3337927B2 (en) 1996-12-13 2002-10-28 株式会社東芝 refrigerator
JP4359779B2 (en) 2006-01-23 2009-11-04 ソニー株式会社 Sound reproduction apparatus and sound reproduction method

Also Published As

Publication number Publication date
WO2009132995A3 (en) 2009-12-23
WO2009132995A2 (en) 2009-11-05
EP2304354A2 (en) 2011-04-06

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