EP2542843A2 - Système et procédé d'égalisation de température appliqués à la porte d'appareils électroménagers - Google Patents

Système et procédé d'égalisation de température appliqués à la porte d'appareils électroménagers

Info

Publication number
EP2542843A2
EP2542843A2 EP11709313A EP11709313A EP2542843A2 EP 2542843 A2 EP2542843 A2 EP 2542843A2 EP 11709313 A EP11709313 A EP 11709313A EP 11709313 A EP11709313 A EP 11709313A EP 2542843 A2 EP2542843 A2 EP 2542843A2
Authority
EP
European Patent Office
Prior art keywords
air
compartment
door
region
temperature
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Withdrawn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
EP11709313A
Other languages
German (de)
English (en)
Inventor
Hugo Flávio Benassi ZANQUETA
Reginaldo Rafael Vieira CÔRREA
Eduardo Cantieri
Eduardo Alves Cardoso
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.)
Electrolux do Brasil SA
Original Assignee
Electrolux do Brasil SA
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
Priority claimed from BRPI1000924-8A external-priority patent/BRPI1000924B1/pt
Application filed by Electrolux do Brasil SA filed Critical Electrolux do Brasil SA
Publication of EP2542843A2 publication Critical patent/EP2542843A2/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/02—Doors specially adapted for stoves or ranges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • 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
    • F25D2317/062—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 along the inside of doors

Definitions

  • the present invention relates to a System for equalization of temperature for application to the door of electrical home appliances, and more specifically, to refrigeration apparatuses, these latter possibly being of the "cycle defrost" type, when the defrosting is performed at each cycle of the compressor (technically known as CycleDefrost), automatic, when the defrosting is controlled autonomously by the refrigerator (technically known as NoFrost or FrostFree) or manual, when there is required the intervention of the user to perform the defrosting, such system being applicable irrespective of the product being provided with one, two or more doors.
  • CycleDefrost cycleDefrost
  • NoFrost or FrostFree a refrigerator
  • manual when there is required the intervention of the user to perform the defrosting
  • the first domestic refrigerator was produced in 1913 Fred W. Wolf Junior in the city of Chicago, and was called Domelre (Domestic Electric Refrigerator). Only in the year of 1925 were manufactured the first refrigerators comprising in one single unit the refrigeration box and the motor, the compressor and the condenser (a trio that formerly existed separately, located beside or below the refrigerator).
  • the refrigerators used toxic gasses as refrigerants. Some examples included ammonia (N3 ⁇ 4), methyl chloride (CH 3 CL) and sulfur dioxide (S0 2 ).
  • N3 ⁇ 4 ammonia
  • CH 3 CL methyl chloride
  • S0 2 sulfur dioxide
  • CFCs chlorofluorocarbons
  • the present invention considers the growing concern towards reducing the level of energy consumption of domestic refrigerators, and is supposed to contribute to the continuous reduction of such levels.
  • a refrigerator wherein the door of the refrigeration compartment comprises a duct embedded therein comprising a cold air suction opening located on the inner face of the door and several cold air diffusion openings, also located on the said inner face.
  • Figures 3 and 4 of the cited document reproduced in the instant application as Fig. 1 and Fig. 2, there are respectively illustrated a side section of the refrigeration compartment and the door in question.
  • the fan 90 is installed on the suction opening 83 of the vertical duct 80 ending at the upper and lower regions of the door at the diffusion openings 81.
  • the said fan extracts the cold air from the central region of the refrigeration compartment and injects the same into the upper and lower regions next to the door, in order to improve the cooling of the foodstuffs stored on the shelves 76 of the door, that are normally exposed to the ambient heat whenever the door is opened.
  • the cold air intended to cool that compartment originates from the freezer (not shown) and is introduced by way of the duct 68. Due to the higher density of the cold air, the same tends to accumulate on the lower region 91 of the refrigerator. Consequently the mode of distribution as presented evidences a loss of efficiency in the process, since that approximately one half of the volume of cold air drawn by the fan 90 is conveyed to the said lower region, which is already naturally the coldest region of the compartment.
  • the object of the present invention consists in the provision of a temperature equalization system for refrigerators that is more efficient than those currently known, such as those presented in the above cited reference.
  • One other object consists in the provision o a temperature equalization system able to be used in freezing compartments, freezer apparatuses and refrigeration compartments.
  • One other object of the invention consists in the provision of a system that does not require alterations in the refrigeration system.
  • One other object consists in the provision of a system that may be used in refrigerators irrespective of the latter being provided with one, two or more doors.
  • One other object consists in the provision of a temperature equalization system that might also be used in other type of electrical home appliances, maintaining the basic operating principle thereof, for example, in ovens and cooking apparatuses.
  • the said circulation comprises the displacement of air between regions with different temperatures, using one or more ventilation fans for such purpose.
  • the means used comprise a ventilation fan associated with an arrangement that comprises at least an air inlet and an air outlet located in different regions of the compartment, interconnected by means for conducting the air flow between the said inlet and the said outlet, the said arrangement being installed on the door of the compartment under consideration, in order to promote a forced circulation of the air, homogenizing the distribution of temperature within the said compartment.
  • the said different regions correspond to different levels of the compartment.
  • the presently proposed system may be used in cycle defrost type products, when the defrosting is effected at each cycle of the compressor (technically known as CycleDefrost), automatic type products, when the defrosting is autonomously controlled by the refrigerator (technically known as NoFrost or FrostFree) or manual type products, when there is required the intervention of the user to effect the defrosting, in products having either 1 (one), 2 (two) or more doors.
  • CycleDefrost cycleDefrost
  • automatic type products when the defrosting is autonomously controlled by the refrigerator
  • manual type products when there is required the intervention of the user to effect the defrosting, in products having either 1 (one), 2 (two) or more doors.
  • the proposed system may be used to equalize the temperature only in the freezing compartment or freezer, in the refrigerating compartment or in both compartments (freezer and refrigerator or freezing compartment and refrigerator).
  • the temperature equalization system is applied to the door of refrigeration apparatuses, thereby avoiding the need of alterations in the refrigeration system.
  • the proposed system promotes an orientation of the direction of the airflow in regions of interest
  • the present invention works in the door of a cooking apparatus, homogenizing the temperature in the oven compartment. Description of the figures
  • Figure 1 there is illustrated, in a cross-sectional view, a known system of homogenization of temperature in the refrigeration compartment.
  • FIG 2 there is shown the piping embedded in the door of the refrigerator of the preceding figure.
  • Figure 3 there is shown, by means of a cross-sectional view of a two-door refrigerator equipped with a system according to the invention, one of the possible embodiments of the airflow within the freezer compartment.
  • Figure 4 there is depicted, by means of a cross-sectional schematic view, the door of the freezer compartment according to the principles of the present invention.
  • Figure 7 there is depicted, in an exploded view, an alternative construction of the proposed system applied to the door of the freezing compartment, in a refrigerator with a single-door cabinet.
  • Figure 8 there is shown a cross-sectional view of the door of the freezing compartment relative to the construction of the preceding figure.
  • Figure 9 there is shown, by means of a perspective view, the flow of air in the alternative construction exemplified in the two preceding figures.
  • the present invention provides a solution for improving the circulation of air in refrigeration systems, whereby this invention may be used in cycle defrost type products, in which the defrosting is effected at each cycle of the compressor (technically known as CycleDefrost), automatic type products, whereby the defrosting is controlled autonomously by the refrigerator (technically known as NoFrost or FrostFree) or manual type products, in which there is required an intervention from the part of the user to effect the defrosting, such including products having 1 (one), 2 (two) or more doors.
  • CycleDefrost cycleDefrost
  • automatic type products whereby the defrosting is controlled autonomously by the refrigerator
  • manual type products in which there is required an intervention from the part of the user to effect the defrosting, such including products having 1 (one), 2 (two) or more doors.
  • the present invention may be used in conventional refrigerators for distributing the air only within the freezing compartment, in the freezer or in the refrigeration compartment or both (freezer and refrigerator or freezing compartment and refrigerator). Furthermore, the presently proposed system will also be able to be used in horizontal-type freezers with one or two doors, as well as in vertical-type freezers.
  • the invention consists in a ventilation fan, means for conducting the airflow, that may be provided by way of a ducting arrangement, either internal or external, air outlets or air inlets, such that, upon being applied to the door of a refrigeration system, the present invention promotes the forced circulation of the air, homogenizing the temperature within the compartment in question.
  • the ventilation fan may be installed inside the door or even at the external part thereof, since this does not change the objects of the present invention, as the purpose of the ventilation fan consists in driving the air in motion within the compartments (forced ventilation).
  • Variations whereby the ventilation fan either sucks or blows the air also do not change the objectives and results of the present invention.
  • Variations in the shapes and positions of the air outlets or of the air inlets also do not affect the objectives and results of the present invention, since the specific function of the air outlets and air inlets consists in directing the airflow towards predetermined regions.
  • the shape and disposition of the ducting arrangement, either internal or external, do not affect the general purposes of the invention.
  • FIG. 3 exemplifies the application of the system according to the invention to the freezer compartment 1 1 of a refrigerator 10 with two doors.
  • the door 12 of the freezer is equipped with a ventilation fan 13 installed in an air suction opening, which extends along a substantially vertical duct 14 and ends in at least one air outlet 15.
  • the air is sucked near the lower region, or level, of the door 12, that is, next to the lower region of the freezer compartment 1 1 , and is again expelled into that same compartment through the said at least one air outlet 15, located on a different region or level relatively to that of the aspiration opening; in this case, this level is the upper level.
  • This forced movement of the air causes a closed-circuit type circulation, as indicated by the arrows, resulting in an equalization of the temperature in the entire freezer compartment.
  • the same should preferentially be located at the same height.
  • Fig. 5 there is exemplified, by means of a cross-sectional view, the application of the proposed system to a refrigerator 20 having a cabinet with a single door 21 wherein are mounted the shelves 22.
  • the temperature equalization system is mounted in the door 24 of the freezing compartment 23, and comprises a fan 26, which draws the cold air from the lower region of the said compartment and expels the said air through the opening 25, located at the upper region of that same compartment, thereby promoting the circulation of air within the same.
  • Fig. 5 there is exemplified, by means of a cross-sectional view, the application of the proposed system to a refrigerator 20 having a cabinet with a single door 21 wherein are mounted the shelves 22.
  • the temperature equalization system is mounted in the door 24 of the freezing compartment 23, and comprises a fan 26, which draws the cold air from the lower region of the said compartment and expels the said air through the opening 25, located at the upper region of that same compartment, thereby promoting the circulation of air within the same.
  • the air drawn by the ventilator fan 26 is directed towards the air outlet openings 25 by means of a set of ducts 27 (represented in dashed lines) embedded in the door 24.
  • FIGS 7, 8 and 9 present an alternative constructive arrangement, in which the means used to conduct the airflow dispense the use of ducts.
  • the door 30 of the freezing compartment (not shown in these figures) comprises the thermally insulating main panel 31, over which inner face turned towards the freezing compartment, there is superimposed a tray 32, preferably molded from a thermoplastic material, with or without a layer of thermal insulation material.
  • This tray has a depth 33, which is sufficient to accommodate the ventilation fan 37 and the supporting pedestal thereof 38, which for a question of constructive convenience, is affixed to the said inner face of the panel 31.
  • the said tray has a circular opening 34 for aspirating air, in a position corresponding to that of the ventilation fan 37 and with sufficient diameter to accommodate the propeller thereof.
  • this tray has two openings 35 and 36, located at a level that is different from that of the said aspiration opening.
  • a cavity or "plenum" 34 as detailed in Fig. 8.
  • the air drawn by the ventilation fan 37 is impelled into the plenum and is thereby diffused, as illustrated by the dashed-line arrows of Fig. 9, towards the openings 35 and 36, through which it is insufflated into the freezing compartment.
  • This construction allows a reduction of the production costs of the system, since it dispenses the use of flow directing ducts, the flow proceeding normally from the aspiration opening 34 to the outlet openings 35 and 36.
  • there may be provided on the inner face of the tray 32 ribs integrally molded therewith and provided such as to orient the airflow between the said aspiration and outlet openings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

La présente invention concerne un système et un procédé d'égalisation de températures appliqués à la porte (12, 24, 30) d'appareils électroménagers en faisant circuler de l'air dans le compartiment de congélation (23), le compartiment congélateur (11) ou le compartiment de réfrigération (16), selon le cas, afin d'éliminer les zones dans lesquelles l'air stagne. Ladite circulation comprend le déplacement forcé de l'air entre au moins une ouverture d'entrée d'air (34) et au moins une ouverture de sortie d'air (15, 25, 35, 36), ledit déplacement forcé étant permis par l'action d'au moins un ventilateur soufflant (13, 26, 37), installé dans l'ouverture d'entrée d'air ou dans l'ouverture de sortie d'air. Lesdites ouvertures sont positionnées dans des zones ayant différentes températures dans le compartiment, et sont interconnectées par des moyens permettant de conduire le flux d'air (14, 27, 34), lesdits moyens pouvant être fournis par des conduites.
EP11709313A 2010-03-05 2011-02-03 Système et procédé d'égalisation de température appliqués à la porte d'appareils électroménagers Withdrawn EP2542843A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BRPI1000542 2010-03-05
BRPI1000924-8A BRPI1000924B1 (pt) 2010-03-23 2010-03-23 sistema e método de equalização de temperatura aplicado à porta de eletrodomésticos
PCT/BR2011/000032 WO2011106856A2 (fr) 2010-03-05 2011-02-03 Système et procédé d'égalisation de température appliqués à la porte d'appareils électroménagers

Publications (1)

Publication Number Publication Date
EP2542843A2 true EP2542843A2 (fr) 2013-01-09

Family

ID=44475120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11709313A Withdrawn EP2542843A2 (fr) 2010-03-05 2011-02-03 Système et procédé d'égalisation de température appliqués à la porte d'appareils électroménagers

Country Status (7)

Country Link
US (1) US20130065502A1 (fr)
EP (1) EP2542843A2 (fr)
KR (1) KR101536042B1 (fr)
CN (1) CN103069228B (fr)
AU (1) AU2011223429B2 (fr)
MX (1) MX2012010213A (fr)
WO (1) WO2011106856A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105091457B (zh) * 2015-07-31 2017-11-17 合肥美的电冰箱有限公司 风冷冰箱及其控制方法和控制系统
US20230068630A1 (en) * 2021-08-25 2023-03-02 Thetford Bv Refrigerator

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Title
See also references of WO2011106856A2 *

Also Published As

Publication number Publication date
WO2011106856A2 (fr) 2011-09-09
WO2011106856A3 (fr) 2011-10-27
CN103069228A (zh) 2013-04-24
AU2011223429B2 (en) 2014-09-18
US20130065502A1 (en) 2013-03-14
AU2011223429A1 (en) 2012-10-25
CN103069228B (zh) 2016-05-25
KR101536042B1 (ko) 2015-07-10
KR20120135515A (ko) 2012-12-14
MX2012010213A (es) 2012-10-01

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