WO2004102090A1 - Arrangement for air circulation by natural convection in refrigerators - Google Patents
Arrangement for air circulation by natural convection in refrigerators Download PDFInfo
- Publication number
- WO2004102090A1 WO2004102090A1 PCT/BR2004/000066 BR2004000066W WO2004102090A1 WO 2004102090 A1 WO2004102090 A1 WO 2004102090A1 BR 2004000066 W BR2004000066 W BR 2004000066W WO 2004102090 A1 WO2004102090 A1 WO 2004102090A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cover plate
- arrangement
- plate
- set forth
- refrigeration compartment
- Prior art date
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
Definitions
- the present invention refers to an arrangement for providing an improved air circulation by natural convection in refrigerators, particularly in the refrigerators that comprise a cabinet defining, internally, a refrigeration compartment and, optionally, a freezer compartment, each compartment being closed by a front door and provided with an evaporating plate.
- the refrigerators that use the system of natural convection to promote air circulation are generally provided with an evaporating plate, positioned close to a rear wall of the refrigeration compartment and which is visible to the user when he/she opens the door.
- evaporating plate is affixed behind the rear wall of the refrigeration compartment, in order to be completely hidden from view of the user upon opening the door of the refrigeration compartment .
- evaporating plate is known as the skin-type evaporating plate.
- the air contained in the refrigeration compartment is submitted to a natural convection process, since by contacting the cooler evaporating plate, its density is increased and it tends to flow down the rear region of the refrigeration compartment.
- the air contained in the front region of the refrigeration compartment, close to the door is at a higher temperature and thus less dense, tending to flow upwardly, as schematically illustrated by the arrows in figure 1.
- the temperature stratification results from the absence of a system for distributing the airflow that is refrigerated in the evaporator. Since the cooler air always tends to flow down, there occurs a significant difference of temperatures between the (warmer) upper region and the (cooler) lower region of the refrigeration compartment .
- the internal exudation occurs due to the fact that the rear mounting region of the evaporating plate, either of the exposed or of the hidden (skin) type is much cooler than the regions more distant from the refrigeration compartment and which are generally adjacent to the lateral and upper walls and to the internal wall of the door. These warmer and more distant regions lose a great amount of heat, by radiation, to the cooler region adjacent the evaporating plate, and thus have their temperatures reduced as a function of said heat transfer by radiation.
- the present invention proposes an arrangement for air circulation by natural convection in a refrigerator of the type that comprises a cabinet defining, internally, a refrigeration compartment, frontally closed by a door and which is provided with an upper wall, side walls, a lower wall, and a rear wall, close to which is affixed an evaporating plate.
- the present arrangement comprises a cover plate affixed in front of the evaporating plate and maintaining from the latter a certain distance for allowing a downward air circulation to occur therebetween.
- the cover plate is configured to avoid visualization of the evaporating plate or of the rear region of the refrigeration compartment that supports the evaporating plate, thus operating as a cold front face of the latter to refrigerate the air in contact therewith.
- the cover plate is further designed to define end and median air passages between the refrigeration compartment and the region that defines the spacing between the cover plate and the evaporating plate.
- the end air passages are defined between the upper and lower end edges of the cover plate and the adjacent portions of the upper and lower walls, respectively, of the refrigeration compartment, the median air passages being defined as respective windows provided in different levels of the cover plate.
- the basic construction defined above allows the temperature stratification inside the refrigeration compartment to be substantially improved, since the cover plate, which is maintained some millimeters from the evaporating plate, allows producing a rise in the air speed in the upper region of the refrigeration compartment, which region is exactly the one presenting a highest temperature.
- the temperature in the upper region of the refrigera ion compartment can be reduced, and consequently the temperature gradient in relation to the coolest region.
- the median air passages provided in the cover plate can be arranged in such a way as to allow the cool airflow, which is flowing down and passing between the evaporating plate and the cover plate, to be divided in multiple flows directed to the interior of the refrigeration compartment at different levels defined by the positioning of said median air passages.
- the median air passages can be also associated with deflecting means provided posteriorly to the cover plate and which help directing a respective portion of the downward cool airflow to the interior of said median air passages.
- the cover plate can present median air passages positioned so as to allow the air from the refrigeration compartment to be admitted in the region located between the evaporating plate and the cover plates, increasing the air circulation in a region of the refrigeration compartment situated between two adjacent shelves. Since the cover plate is positioned in such a manner as to hide the region of the evaporating plate, it actuates as a means for blocking the heat transfer by radiation, from the warmest wall portions of the refrigeration compartment to the coolest region of the evaporating plate, which region can be defined by the evaporating plate itself or by the refrigerated region of the rear wall in case of the skin system.
- Figure 1 is a simplified vertical cross-sectional view of a refrigerator provided with a refrigeration compartment, illustrating the air circulation by natural convection, according to the known prior art constructions ;
- Figure 2 is a view similar to that of figure 1, but illustrating the arrangement of the present invention applied to said refrigeration compartment;
- Figure 3 is a front view of the refrigerator illustrated in figures 1 and 2, with the door being removed to better illustrate the position of the air passages in relation to the cover plate, to the evaporating plate, and to the upper and lower walls of the refrigeration compartment;
- Figure 4 is a partially cut perspective view of both the cover plate and the evaporating plate, illustrating a possible construction for the deflectors associated with the median air passages;
- Figure 5 is a view similar to that of figure 2, but illustrating the present arrangement when associated with the shelves of the refrigeration compartment, and with the provision of a cover plate having a median air passage for the median admission or entry of air into the region situated between the evaporating plate and the cover plate; and air directing rear fins;
- Figure 6 is a front view of the refrigerator of figure 5 without the door;
- Figure 7 is a partial rear plan view of the cover plate used in the construction of figures 5 and 6.
- the arrangement for air circulation by natural convection of the present invention is directed to refrigerators comprising a cabinet 10, which defines, internally, a refrigeration compartment 20, frontally closed by a door 30 and which is provided with an upper wall 21, side walls 22, a lower wall 23, and a rear wall 24, it being further understood that the cabinet 10 can be optionally provided with a freezer compartment (not illustrated) , generally mounted above the refrigeration compartment 20 and which is separated therefrom by a dividing wall.
- a freezer compartment (not illustrated)
- evaporating plate 40 in front of the rear wall 24 of the refrigeration compartment 20 is affixed an evaporating plate 40, of a known construction and extended along a substantial part of the height and width of said rear wall 24.
- the arrangement for air circulation comprises a cover plate 50, which is generally flat and constructed in a material of low thermal conductivity, such as a plastic material.
- the cover plate 50 is dimensioned and configured to completely cover the evaporating plate 40, when the latter is mounted in an exposed manner in the refrigeration compartment 20, in front of the rear wall 24 of the latter, preventing said evaporating plate 40 from being visible to the user upon opening the door 30 of the cabinet 10.
- the cover plate 50 covers the region of the rear wall 24 behind which is seated the evaporating plate 40 and in front of which occurs the formation of ice.
- the cover plate 50 defines end air passages 51, 52 and median air passages 53 between the refrigeration compartment 20 and the region defined between the cover plate 50 and the evaporating plate 40.
- the cover plate 50 presents an upper end edge 50a and a lower end edge 50b which are respectively spaced from adjacent portions of the upper wall 21 and the lower wall 23 of the refrigeration compartment 20, allowing the air to enter through the upper end of the region defined between the evaporating plate 40 and the cover plate 50, and the lower exit of the refrigerated downward airflow to the inside of the refrigeration compartment 20, as illustrated by the arrows in figure 2.
- the spacing defined between the upper end edge 50a and the lower end edge 50b of the cover plate 50 and the adjacent portions of the upper wall 21 and the lower wall 23 of the refrigeration compartment 20 defines end air passages 51 and 52, in relation to said cover plate 50, which allow the air to circulate by natural convection inside the refrigeration compartment and to pass along the evaporating plate 40.
- the cover plate 50 can be dimensioned to adequately cover the evaporating plate 40 and, at the same time, present a height which is substantially lower than the height of the refrigeration compartment 20 defined between the upper wall 21 and the lower wall 23 of the latter, in order to form the end air passages 51, 52 close to the upper end edge 50a and the lower end edge 50b of the cover plate 50.
- the cover plate 50 is further provided with median openings 53, allowing the fluid communication to occur between different levels of the refrigeration compartment 20 and the region defined between the cover plate 50 and the evaporating plate 40.
- median air passages 53 are preferably defined by respective windows, provided in different levels of the cover plate 50 and each presenting a width that is substantially smaller than that of the cover plate 50. The provision of median air passages 53 allows the airflow which is refrigerated by the evaporating plate
- the median air passages 53 for the outflow of the cool air are preferably positioned in the lower region of the gap defined between two adjacent shelves, as illustrated in figures 5 and 6.
- the present arrangement can further comprise a deflector 60, which is positioned between the evaporating plate 40 and the cover plate 50 and close to each median air passage 53, in order to direct to the latter and to the inside of the adjacent region of the refrigeration compartment 20, the downward circulating airflow that reaches the deflector 60.
- each deflector 60 comprises a small plate inclinedly projecting backwardly and upwardly from a lower edge of the respective median air passage 53, said deflector maintaining a slight spacing in relation to the front face of the evaporating plate 40 and preferably presenting a curved concave upper surface.
- the deflectors 60 are illustrated as fixed elements incorporated to the rear part of the cover plate 50, it should be understood that they might be mounted to the structure of the cabinet or to the cover plate 50 itself, in order to be selectively, individually or jointly displaced to different operative positions, varying the quantity of cool air supplied to the respective level of the refrigeration compartment 20.
- the downward airflow tends to deviate to both sides of each deflector, stopping to supply air to the respective median air passage 53.
- the fins 55 can present a width equal to or smaller than the distance "D" that separates the evaporating plate 40 from the cover plate 50, and they can be affixed to the latter or to the structure of the cabinet 10.
- refrigerators provided with shelves 15 made of glass or other material defining a horizontal internal panel, it may be advantageous to increase the air circulation in one or more gaps defined between each two adjacent shelves.
- the cover plate 50 is provided with one or more median air passages 54 for air admission, each being positioned in the upper region of a respective gap between two shelves 15, so as to allow an incoming airflow to be formed from the upper region of the gap to the interior of the region defined between the evaporating plate 40 and the cover plate 50.
- the median air passages 54 for air admission are dimensioned and arranged so as not to interfere with the downward cool airflow, which is directed to each deflector 60. While only one exemplary embodiment of the present invention has been schematically illustrated herein, it should be understood that changes in the form and relative arrangement of the components could be made without departing from the inventive concept defined in the appended claims.
Landscapes
- 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)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04732554A EP1623168A1 (en) | 2003-05-15 | 2004-05-13 | Arrangement for air circulation by natural convection in refrigerators |
AU2004238898A AU2004238898A1 (en) | 2003-05-15 | 2004-05-13 | Arrangement for air circulation by natural convection in refrigerators |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0301427-4 | 2003-05-15 | ||
BR0301427A BR0301427A (en) | 2003-05-15 | 2003-05-15 | Natural convection air circulation arrangement in a refrigerator |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004102090A1 true WO2004102090A1 (en) | 2004-11-25 |
Family
ID=33437649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BR2004/000066 WO2004102090A1 (en) | 2003-05-15 | 2004-05-13 | Arrangement for air circulation by natural convection in refrigerators |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1623168A1 (en) |
CN (1) | CN1820170A (en) |
AU (1) | AU2004238898A1 (en) |
BR (1) | BR0301427A (en) |
WO (1) | WO2004102090A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012041474A3 (en) * | 2010-09-27 | 2012-06-07 | Thermia Värme Ab | Heat exchanger arrangement and heat pump system |
ES2459596A1 (en) * | 2012-11-07 | 2014-05-09 | BSH Electrodomésticos España S.A. | Domestic refrigerator device comprising a space to house products that have to be cooled and a rear wall to introduce cold air into the space (Machine-translation by Google Translate, not legally binding) |
CN110513945A (en) * | 2019-09-21 | 2019-11-29 | 广州市广谷制冷设备有限公司 | A kind of cold storage refrigerating system and method |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013213378A1 (en) * | 2013-07-09 | 2015-01-15 | BSH Bosch und Siemens Hausgeräte GmbH | Refrigerating appliance with an air duct |
CN112449526A (en) * | 2020-10-20 | 2021-03-05 | 国网山东省电力公司烟台供电公司 | Power distribution switch monitoring terminal |
CN112815234B (en) * | 2021-01-11 | 2023-02-17 | 广东智源机器人科技有限公司 | Control method, device and equipment for fluid delivery and cooking system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT192427B (en) * | 1955-06-10 | 1957-10-25 | Metallbau J Treiber K G | Refrigerator evaporator |
US3096629A (en) * | 1961-04-05 | 1963-07-09 | Gen Motors Corp | Frostless freezer |
US4353223A (en) * | 1979-07-17 | 1982-10-12 | Bosch-Siemens Hausgerate Gmbh | Refrigerator with a large refrigeration chamber cooled by natural convection |
EP0569720A1 (en) * | 1992-05-12 | 1993-11-18 | AEG Hausgeräte GmbH | Refrigerating apparatus with evaporator |
DE10143241A1 (en) * | 2001-09-04 | 2003-03-20 | Bsh Bosch Siemens Hausgeraete | Refrigeration device with Coldwall evaporator |
-
2003
- 2003-05-15 BR BR0301427A patent/BR0301427A/en not_active IP Right Cessation
-
2004
- 2004-05-13 WO PCT/BR2004/000066 patent/WO2004102090A1/en not_active Application Discontinuation
- 2004-05-13 AU AU2004238898A patent/AU2004238898A1/en not_active Abandoned
- 2004-05-13 EP EP04732554A patent/EP1623168A1/en not_active Withdrawn
- 2004-05-13 CN CN 200480016741 patent/CN1820170A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT192427B (en) * | 1955-06-10 | 1957-10-25 | Metallbau J Treiber K G | Refrigerator evaporator |
US3096629A (en) * | 1961-04-05 | 1963-07-09 | Gen Motors Corp | Frostless freezer |
US4353223A (en) * | 1979-07-17 | 1982-10-12 | Bosch-Siemens Hausgerate Gmbh | Refrigerator with a large refrigeration chamber cooled by natural convection |
EP0569720A1 (en) * | 1992-05-12 | 1993-11-18 | AEG Hausgeräte GmbH | Refrigerating apparatus with evaporator |
DE10143241A1 (en) * | 2001-09-04 | 2003-03-20 | Bsh Bosch Siemens Hausgeraete | Refrigeration device with Coldwall evaporator |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012041474A3 (en) * | 2010-09-27 | 2012-06-07 | Thermia Värme Ab | Heat exchanger arrangement and heat pump system |
ES2459596A1 (en) * | 2012-11-07 | 2014-05-09 | BSH Electrodomésticos España S.A. | Domestic refrigerator device comprising a space to house products that have to be cooled and a rear wall to introduce cold air into the space (Machine-translation by Google Translate, not legally binding) |
CN110513945A (en) * | 2019-09-21 | 2019-11-29 | 广州市广谷制冷设备有限公司 | A kind of cold storage refrigerating system and method |
Also Published As
Publication number | Publication date |
---|---|
EP1623168A1 (en) | 2006-02-08 |
AU2004238898A1 (en) | 2004-11-25 |
BR0301427A (en) | 2004-12-21 |
CN1820170A (en) | 2006-08-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4695182B2 (en) | refrigerator | |
US5357769A (en) | Bottom mount refrigerator air return system | |
CN109990529B (en) | Refrigerator with a door | |
JP2601057B2 (en) | Freezer refrigerator | |
JP5254578B2 (en) | refrigerator | |
CN108050750B (en) | Refrigerator with a door | |
EP1623168A1 (en) | Arrangement for air circulation by natural convection in refrigerators | |
JP2010151334A (en) | Refrigerator | |
EP2593734B1 (en) | No-frost refrigerator | |
US20020047506A1 (en) | Refrigerator shelf | |
KR101645731B1 (en) | Refrigerator | |
JP2009092340A (en) | Refrigerator | |
JP2880275B2 (en) | refrigerator | |
JPH11325695A (en) | Indirect cooling refrigerator | |
RU2759646C2 (en) | Cooled counter-showcase and corresponding system of distribution of cooled air flow | |
WO2012007807A2 (en) | Lighting system for refrigerators | |
JP2009068800A (en) | Refrigerator | |
JP2594178B2 (en) | Frozen case | |
KR101048222B1 (en) | Refrigerator | |
JPH0564688U (en) | Storage | |
JP2008298354A (en) | Refrigerator | |
JP5617003B2 (en) | refrigerator | |
JP5620538B2 (en) | refrigerator | |
EP4361536A1 (en) | Refrigerator | |
US20240230205A9 (en) | Refrigerator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 543492 Country of ref document: NZ Ref document number: 5150/DELNP/2005 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2004238898 Country of ref document: AU |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2004732554 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2004238898 Country of ref document: AU Date of ref document: 20040513 Kind code of ref document: A |
|
WWP | Wipo information: published in national office |
Ref document number: 2004238898 Country of ref document: AU |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20048167413 Country of ref document: CN |
|
WWP | Wipo information: published in national office |
Ref document number: 2004732554 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2004732554 Country of ref document: EP |