WO2004068048A1 - Improved refrigerated cabinet - Google Patents

Improved refrigerated cabinet Download PDF

Info

Publication number
WO2004068048A1
WO2004068048A1 PCT/NZ2004/000019 NZ2004000019W WO2004068048A1 WO 2004068048 A1 WO2004068048 A1 WO 2004068048A1 NZ 2004000019 W NZ2004000019 W NZ 2004000019W WO 2004068048 A1 WO2004068048 A1 WO 2004068048A1
Authority
WO
WIPO (PCT)
Prior art keywords
cabinet
duct
fan
refrigeration unit
end outlet
Prior art date
Application number
PCT/NZ2004/000019
Other languages
French (fr)
Inventor
Richard George Phillip Salt
Original Assignee
Skope Industries Limited
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 Skope Industries Limited filed Critical Skope Industries Limited
Priority to EP04707341A priority Critical patent/EP1588110B1/en
Priority to US10/541,437 priority patent/US7237403B2/en
Priority to AT04707341T priority patent/ATE435406T1/en
Priority to AU2004208077A priority patent/AU2004208077B2/en
Priority to DE602004021769T priority patent/DE602004021769D1/en
Publication of WO2004068048A1 publication Critical patent/WO2004068048A1/en
Priority to HK06107906.2A priority patent/HK1087767A1/en

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
    • 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0404—Cases or cabinets of the closed type
    • A47F3/0408—Cases or cabinets of the closed type with forced air 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
    • F25D2317/065—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 the air return
    • F25D2317/0651—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 the air return through the bottom
    • 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
    • F25D2317/065—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 the air return
    • F25D2317/0654—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 the air return through the side
    • 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
    • F25D2317/065—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 the air return
    • F25D2317/0655—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 the air return through the top
    • 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
    • F25D2317/066—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 the air supply
    • F25D2317/0665—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 the air supply from the top
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/38—Refrigerating devices characterised by wheels

Abstract

A refrigerated cabinet includes a fan assisted refrigeration unit and a duct in communication with the fan, for distributing cold air from the fan throughout the cabinet; the duct is substantially the full width and the full length of the product storage of the cabinet and at least a major portion of the duct has a substantially constant width; one end of the duct is in communication with a fan and the opposite end of the duct provides an end outlet; intermediate outlets are formed through the duct between the ends, to supply air from the duct to the product storage portion of the cabinet; the size of the end outlet is substantially smaller than the size of the intermediate outlets, so that in use the duct is pressurized compared to the remainder of the cabinet.

Description

Title: Improved Refrigerated Cabinet
Technical Field
The present invention relates to an improvement in a refrigerated cabinet of the type in which cold air is circulated around the cabinet by a fan.
Background Art
For efficient refrigerated storage of product within the cabinet, it is important that cold air from the refrigeration unit is circulated evenly throughout the cabinet. In known designs, the evaporator of the refrigeration unit is fitted with one or more fans, which are driven to circulate cold air from the vicinity of the refrigeration unit throughout the body of the cabinet. However, air naturally tends towards the path of least resistance, and if the shelves of the cabinet are heavily stacked with product, restricting the spaces between adjacent shelves, air tends to move preferentially towards the opposite end of the cabinet from the fan, rather than between the shelves.
Disclosure of Invention
It is therefore an object of the present invention to provide a refrigerated cabinet in which the above described problem is overcome or at least ameliorated.
A refrigerated cabinet which includes a fan assisted refrigeration unit and a duct in communication with said fan, said duct being adapted to distribute cold air from said fan throughout said cabinet; wherein said duct extends substantially the full width and the full length of the product storage portion of the cabinet and at least a major portion of said duct has a substantially constant width; one end of said duct being in communication with the fan and the opposite end of said duct providing an end outlet; the portion of said duct between said ends being formed with a plurality of intermediate outlets adapted to supply air from said duct to the product storage portion of the cabinet; the size of said end outlet being substantially smaller than the size of said intermediate outlets, such that in use air in said duct is pressurized compared to the remainder of said cabinet. The end outlet may be formed in any suitable manner, e.g. by forming an aperture through the duct at or adjacent the end of the duct or by forming a flange which extends across part of the width of the duct and so forms an end outlet of reduced size.
The fan assisted refrigeration unit may be mounted at any of a variety of positions on the cabinet, e.g. at the top of the cabinet or at the base of the cabinet or at one of the ends of the cabinet.
The degree of pressurization of the air in the duct compared to the remainder of the cabinet can be varied to suit the size and shape of the cabinet and the degree of refrigeration required. Typically, a pressure increase in the duct of about 60% compared to the remainder of the cabinet for a refrigerated cabinet which has a top mounted fan assisted refrigeration unit, is found to give good results in practice.
Brief Description of Drawings
By way of example only, preferred embodiments of the present invention are described in detail, with reference to the accompanying drawings, in which:- Fig. 1 shows a diagrammatic longitudinal section through a cabinet in accordance with a first embodiment of the invention;
Fig. 2 shows a diagrammatic longitudinal section through a cabinet in accordance with a second embodiment of the invention; and
Fig. 3 shows a diagrammatic longitudinal section through a cabinet in accordance with a third embodiment of the invention.
Referring to Fig. 1 , a refrigerated cabinet 2 is of known type:- an insulated cabinet with a full height glazed door 3 and a top mounted refrigeration unit 4. The cabinet 2 is mounted on castors 5. The interior of the cabinet is provided with racks or shelves 6 on which product 7 is displayed.
The refrigeration unit 4 is of conventional type, and fitted with an air circulation fan 8 powered by a fan motor in known manner. On leaving the fan 8, the cold air (arrows A) passes down a duct 10 formed down the back of the cabinet, and extending across the full width of the back of the cabinet. To keep the product 7 chilled efficiently, it is important that the cold air is circulated evenly around the interior of the cabinet. However, in known designs of cabinet, the path of least resistance for the cold air is to pass directly down the duct 10 to the bottom of the cabinet; this is especially so when the cabinet contains a large volume of product and the space between adjacent shelves 6 is restricted. It will be appreciated that this leads to inefficient chilling of the product.
To overcome this problem, the width of the duct 10 is restricted by a flange 11 which extends across the full width of the back of the cabinet and leaves only a small space between the outer end of the flange 11 and the rear wall 13 of the cabinet as the end outlet 12. The effect of this restriction is to make it more difficult for air to enter the bottom space 14 below the lowest shelf in the cabinet and thus to pressurize the air in the duct. This pressurization of the duct 10 forces air out through intermediate outlets 15,15a:- slots 15 formed across the duct 10 immediately below each of the cabinet shelves 6, (as indicated by Arrows B) and smaller slots 15a positioned between the slots 15; this gives a greatly improved distribution of air throughout the whole length of the cabinet.
The intermediate outlets 15,15a may be of any length, but typically are formed as a series of short slots across the width of the duct, of larger size than the end outlet 12.
The second and third embodiment as shown in Fig.s 2 and 3 are of the same general type of design as that of Fig. 1 and similar parts are given the same reference numerals.
In the embodiment of Fig. 2, the refrigeration unit 4 is mounted at the bottom of the cabinet, so that cold air (Arrow A) passes upwards from the bottom of the cabinet along the duct 10. The end outlet 12a is formed as a small aperture in the wall of the duct 10. In this embodiment, the width of the duct 10 remains constant adjacent the end outlet 12a, (i.e. there is no equivalent to flange 11 , Fig. 1 ). The fact that the end outlet 12a is small compared to the intermediate outlets 15,15a has the effect of pressuring the air in the duct 10.
In the embodiment of Fig. 3, the refrigerated cabinet 2 is horizontal and the access door (not visible) is a hinged or sliding panel across the front of the cabinet. The refrigeration unit 4 is mounted at one end of the cabinet and the duct 10 is formed along the top of the cabinet. As in the Fig. 2 embodiment, the end outlet 12b of the duct is formed as a small aperture in the wall of the duct.
In Fig.s 2 and 3, the cold air coming from the refrigeration unit is indicated by Arrow A and the air circulating through the food storage area by Arrows B.

Claims

Claims:
1. A refrigerated cabinet which includes a fan assisted refrigeration unit and a duct in communication with said fan, said duct being adapted to distribute cold air from said fan throughout said cabinet; wherein said duct extends substantially the full width and the full length of the product storage portion of the cabinet and at least a major portion of said duct has a substantially constant width; one end of said duct being in communication with the fan and the opposite end of said duct providing an end outlet; the portion of said duct between said ends being formed with a plurality of intermediate outlets adapted to supply air from said duct to the product storage portion of the cabinet; the size of said end outlet being substantially smaller than the size of said intermediate outlets, such that in use air in said duct is pressurized compared to the remainder of said cabinet.
2. The cabinet as claimed in claim 1, wherein said end outlet is formed by an aperture through the duct at or adjacent the end of the duct.
3. The cabinet as claimed in claim 1 , wherein said end outlet is formed by a flange extending across part of the width of said duct.
4. The cabinet as claimed in any one of the preceding claims, wherein said fan assisted refrigeration unit is mounted at the top of the cabinet.
5. The cabinet as claimed in any one of claims 1 - 3, wherein said fan assisted refrigeration unit is mounted at the base of the cabinet.
6. The cabinet as claimed in any one of claims 1 - 3, wherein a fan assisted refrigeration unit is mounted at one end of the cabinet.
PCT/NZ2004/000019 2003-01-31 2004-02-02 Improved refrigerated cabinet WO2004068048A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP04707341A EP1588110B1 (en) 2003-01-31 2004-02-02 Improved refrigerated cabinet
US10/541,437 US7237403B2 (en) 2003-01-31 2004-02-02 Refrigerated cabinet
AT04707341T ATE435406T1 (en) 2003-01-31 2004-02-02 IMPROVED REFRIGERATOR
AU2004208077A AU2004208077B2 (en) 2003-01-31 2004-02-02 Improved refrigerated cabinet
DE602004021769T DE602004021769D1 (en) 2003-01-31 2004-02-02 IMPROVED REFRIGERATOR
HK06107906.2A HK1087767A1 (en) 2003-01-31 2006-07-14 Improved refrigerated cabinet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ523967A NZ523967A (en) 2003-01-31 2003-01-31 Refrigerated cabinet with ducted air flow.
NZ523967 2003-01-31

Publications (1)

Publication Number Publication Date
WO2004068048A1 true WO2004068048A1 (en) 2004-08-12

Family

ID=32822983

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ2004/000019 WO2004068048A1 (en) 2003-01-31 2004-02-02 Improved refrigerated cabinet

Country Status (9)

Country Link
US (1) US7237403B2 (en)
EP (1) EP1588110B1 (en)
CN (1) CN100416194C (en)
AT (1) ATE435406T1 (en)
AU (1) AU2004208077B2 (en)
DE (1) DE602004021769D1 (en)
HK (1) HK1087767A1 (en)
NZ (1) NZ523967A (en)
WO (1) WO2004068048A1 (en)

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EP3462998A4 (en) * 2016-05-31 2019-11-13 Pepsico, Inc. Product merchandising systems and methods

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JP5722099B2 (en) * 2011-03-31 2015-05-20 ホシザキ電機株式会社 Coolant rack

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Publication number Priority date Publication date Assignee Title
EP3462998A4 (en) * 2016-05-31 2019-11-13 Pepsico, Inc. Product merchandising systems and methods

Also Published As

Publication number Publication date
DE602004021769D1 (en) 2009-08-13
US7237403B2 (en) 2007-07-03
AU2004208077B2 (en) 2008-12-11
EP1588110B1 (en) 2009-07-01
AU2004208077A1 (en) 2004-08-12
ATE435406T1 (en) 2009-07-15
CN1745284A (en) 2006-03-08
NZ523967A (en) 2004-10-29
CN100416194C (en) 2008-09-03
EP1588110A4 (en) 2007-09-05
HK1087767A1 (en) 2006-10-20
US20060096311A1 (en) 2006-05-11
EP1588110A1 (en) 2005-10-26

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