EP1582829A1 - Meuble réfrigéré amélioré - Google Patents

Meuble réfrigéré amélioré Download PDF

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Publication number
EP1582829A1
EP1582829A1 EP05251854A EP05251854A EP1582829A1 EP 1582829 A1 EP1582829 A1 EP 1582829A1 EP 05251854 A EP05251854 A EP 05251854A EP 05251854 A EP05251854 A EP 05251854A EP 1582829 A1 EP1582829 A1 EP 1582829A1
Authority
EP
European Patent Office
Prior art keywords
cabinet
condenser
duct
refrigeration
evaporator
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Withdrawn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
EP05251854A
Other languages
German (de)
English (en)
Inventor
Suyash Baichoo
Adam Harrison
Lee Martin
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.)
Alan Nuttall Ltd
Original Assignee
Alan Nuttall Ltd
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 GB0407053A external-priority patent/GB0407053D0/en
Priority claimed from GB0414218A external-priority patent/GB0414218D0/en
Application filed by Alan Nuttall Ltd filed Critical Alan Nuttall Ltd
Publication of EP1582829A1 publication Critical patent/EP1582829A1/fr
Withdrawn legal-status Critical Current

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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
    • F25D23/00—General constructional features
    • F25D23/003—General constructional features for cooling refrigerating machinery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/06—Damage
    • 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
    • F25D23/00—General constructional features
    • F25D23/006—General constructional features for mounting refrigerating machinery components
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/141—Removal by evaporation
    • F25D2321/1411—Removal by evaporation using compressor heat
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/141—Removal by evaporation
    • F25D2321/1412—Removal by evaporation using condenser heat or heat of desuperheaters
    • 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
    • F25D2323/00—General constructional features not provided for in other groups of this subclass
    • F25D2323/002—Details for cooling refrigerating machinery
    • F25D2323/0026—Details for cooling refrigerating machinery characterised by the incoming air flow
    • F25D2323/00264—Details for cooling refrigerating machinery characterised by the incoming air flow through the front bottom part
    • 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
    • F25D2323/00—General constructional features not provided for in other groups of this subclass
    • F25D2323/002—Details for cooling refrigerating machinery
    • F25D2323/0027—Details for cooling refrigerating machinery characterised by the out-flowing air
    • F25D2323/00272—Details for cooling refrigerating machinery characterised by the out-flowing air from the back top

Definitions

  • the present invention relates to refrigeration cabinets and in particular to open fronted refrigeration cabinets of the type utilised in retail premises to store and display chilled goods.
  • Open fronted refrigeration cabinets have been utilised in retail premises for a number of years.
  • chilled goods for example dairy products such as cheese and milk
  • shelves provided within the interior of the cabinet.
  • the refrigeration apparatus of the cabinet operates to maintain the cabinet interior at a predetermined reduced temperature, and typically is configured to produce a downwardly directed cold air curtain across the open front.
  • the lack of a door further eliminates the problems associated condensation and frosting which may reduce the visibility through glazed portions of such a door.
  • the refrigeration apparatus is typically provided in the base of the cabinet and requires periodic inspection and maintenance.
  • an open fronted refrigeration cabinet having a refrigerated space accessible through an open front of the cabinet, the cabinet further having a vapour refrigeration apparatus including a condenser, a compressor and an evaporator in fluid communication with one another, wherein the condenser is provided on an outer rear wall of the cabinet and shrouded by a duct.
  • the provision of the condenser on the rear wall of the cabinet allows a larger condenser to used in comparison to known cabinets of similar size where the condenser is typically situated in the base.
  • the condenser is also spaced upwardly from the base and hence is less susceptible to becoming coated with material such as dust and dirt which may be present on the surface upon which the cabinet rests, in use.
  • the use of a larger condenser allows the size and spacing of the fins thereof to be increased which in turn reduces the possibility of dust being retained thereon.
  • the provision of the duct serves both to promote an air current over the condenser and to protect the condenser from damage.
  • the duct is removable to allow access to the condenser.
  • the duct is provided with an inlet in a lower region thereof and an outlet in an upper region thereof. The inlet permits the admission of cool air to the duct, while the outlet directs air warmed by the condenser upwards and away from the cabinet.
  • the cabinet is preferably further provided with an evaporator condensate collection and disposal arrangement comprising a collection tray positioned to receive condensate released from the surface of the evaporator and a heating means positioned in a lower portion of the collection tray, wherein the heating means comprises a portion of a refrigerant communication line extending between the compressor and the condenser.
  • the positioning of the refrigerant communication line in the tray permits heat energy transferred to the refrigerant by compression thereof to be used to evaporate any condensate in the collection tray.
  • the communication line is tightly coiled within the tray so as to provide a sufficient surface area to ensure that the condensate is evaporated without the neat for additional heat input.
  • Condensate evaporated from the tray passes to the duct whereupon it is conveyed upwards and away from the cabinet through the outlet.
  • the cabinet may be provided with a fan in the vicinity of the tray to generate an air current in the direction of the duct.
  • FIG 1 there is shown an open fronted refrigeration cabinet, generally designated 10, of the type utilised in food retail establishments.
  • the cabinet 10 comprises a base portion 12, a rear wall portion 14 and a ceiling portion 16.
  • the cabinet 10 further includes end wall portions which have been omitted for the sake of clarity.
  • the base 12, rear wall 14, ceiling 16 and end walls serve to partially enclose a refrigerated space 18 which is accessible via the open front 20 of the cabinet 10.
  • the rear wall 14 is provided with a number of shelves (not shown) upon which produce may be supported.
  • a layer of thermal insulation 28 is provided in the cabinet 10 around the refrigerated space 18 to prevent the influx of heat energy into the refrigerated space 18.
  • the cabinet 10 is further provided with a refrigeration apparatus which includes a compressor 22, an evaporator 24 and a condenser 26 linked to one another by various refrigerant conduits.
  • the evaporator 24 is positioned in the rear wall 14 on the refrigerated space side of the insulation 28, while the condenser 26 is mounted on the outside of the rear wall 14 on the opposing side of the insulation 28.
  • the compressor 22 is situated in the base 12 of the cabinet on the opposite side of the insulation 28 to the refrigerated space.
  • the compressor 22 is accessible in the base 12 via a removable panel 30.
  • the cabinet 10 is further provided with a fan 32 operable to circulate cold air within the refrigerated space as indicated by arrows 34.
  • the refrigeration apparatus operates on a conventional refrigeration cycle whereby heat energy is removed from the refrigerated space 18 by the evaporation of refrigerant in the evaporator 24.
  • the evaporated refrigerant is then compressed in the compressor 22 before being passed to the condenser 26.
  • the heat energy gained by the refrigerant in the evaporator 24 is released as the refrigerant condenses and is passed to the air surrounding the condenser 26.
  • the condenser 26 is mounted on the outside of the rear wall 14 of the cabinet 10.
  • the condenser 26 is of a conventional type comprising a finned tube.
  • the condenser 26 is surrounded by a duct 34 having an outlet 36 at the upper end thereof.
  • An inlet (not shown) is provided towards the base of the duct 34 below the lower edge of the condenser 26. Air heated by the condenser 26 is directed upwardly through the duct 34 and out of the outlet 36 as indicated by arrows 38.
  • the duct 34 also acts to as a shield for the condenser 26, thereby protecting it from damage, for example during transport and installation of the cabinet 10.
  • the positioning of the condenser 26 on the rear wall 14 further enables a larger condenser to be used when compared to existing cabinets of a similar size.
  • the condenser is situated in the base of the cabinet where space is at a premium.
  • the condenser is susceptible to becoming coated with dust and dirt which reduce the heat transfer efficiency thereof. Subsequent cleaning of the condenser may be difficult due to its low position and access may be restricted by the presence of other system components such as the compressor and circulation fans.
  • the condenser 26 does require cleaning, then the whole of the condenser 26 is readily accessible by the simple removal of the duct 34.
  • the use of a larger condenser 26 also allows the spacing and size of the fins to be increased, thereby reducing the possibility of dirt and dust being trapped thereby.
  • the repositioning of the condenser 26 frees up space within the base 12 and thereby permits the advantageous repositioning of other system components.
  • the compressor 22 can be positioned at the front of the base portion 12 where it can be easily accessed via the removable panel 30.
  • a further feature of the present invention is the provision of a condensate waste water evaporator which utilised waste heat generated by the compressor.
  • the evaporator 24 becomes coated with ice which must be periodically removed if the heat transfer efficiency of the evaporator 24 is not to suffer.
  • Defrosting of the evaporator 24 is typically achieved by temporarily suspending the operation of the refrigeration apparatus and warming the evaporator 24 to melt any ice attached thereto. Warming of the evaporator may be achieved by the provision of dedicated heating elements.
  • the cabinet 10 is provided with a collection tray 40 positioned below the evaporator 24 to catch and retain evaporator melt water.
  • the refrigerant conduit 42 extending between the compressor 22 and the condenser 26 passes through a lower portion of the tray 40.
  • the compression of the refrigerant in the compressor 22 raises the temperature of the refrigerant above that of the ambient temperature surrounding the cabinet 10.
  • the surface area of the portion of the conduit 42 within the collection tray 40 is made as large as possible. This is achieved by tightly coiling the conduit 42 within the tray 40.
  • the conduit 42 is configured in a flat spiral or involute shape.
  • the conduit 42 may be configured into a plurality of flat spirals which are stacked over one another.
  • FIGS 2 and 3 show the conduit 42 in greater detail.
  • the conduit 42 comprises a tube having an inlet 48 in communication with the compressor 22, an outlet 50 in communication with the condenser 26, and a coiled intermediate portion 52 between the inlet and outlet 48,50.
  • the intermediate portion 52 comprises a plurality of coils in contact with one another between the inner and outer coils 54,56.
  • More than one conduit 42 may be provided. As can be seen from figure 3 two conduits 42 may be stacked on top of one another and secured for example by a number of tack welds.
  • the heat energy transferred to water within the tray 40 via the conduit 42 leads to its evaporation.
  • a fan 44 is provided in the vicinity of the tray 40 to direct an air current, indicated by arrow 46, over the tray 40.
  • the air current 46 entrains evaporated water molecules and directs them into the duct 34 whereupon they are entrained in the upwardly directed air current generated by the condenser 26.
  • the evaporated water is thus directed upwards and away from the cabinet 10 through the outlet 36.

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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP05251854A 2004-03-29 2005-03-24 Meuble réfrigéré amélioré Withdrawn EP1582829A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0407053 2004-03-29
GB0407053A GB0407053D0 (en) 2004-03-29 2004-03-29 Improved refrigeration cabinet
GB0414218A GB0414218D0 (en) 2004-06-24 2004-06-24 Improved refrigeration cabinet
GB0414218 2004-06-24

Publications (1)

Publication Number Publication Date
EP1582829A1 true EP1582829A1 (fr) 2005-10-05

Family

ID=34889145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05251854A Withdrawn EP1582829A1 (fr) 2004-03-29 2005-03-24 Meuble réfrigéré amélioré

Country Status (1)

Country Link
EP (1) EP1582829A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012095262A3 (fr) * 2011-01-13 2012-09-27 BSH Bosch und Siemens Hausgeräte GmbH Appareil de froid
ITUB20152929A1 (it) * 2015-08-06 2017-02-06 Imat Spa Abbattitore di temperatura specificatamente per uso domestico

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB701900A (en) * 1952-03-15 1954-01-06 Gen Electric Improvements in and relating to drain pans for refrigerators
GB2200980A (en) * 1987-02-06 1988-08-17 Zanussi A Spa Industrie Domestic refrigerator and/or freezer appliance with closable back wall
JPH0743060A (ja) * 1993-07-30 1995-02-10 Sanyo Electric Co Ltd 冷蔵ショーケース
JP2000236998A (ja) * 1999-02-19 2000-09-05 Fukushima Industries Corp 冷蔵ショーケース

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB701900A (en) * 1952-03-15 1954-01-06 Gen Electric Improvements in and relating to drain pans for refrigerators
GB2200980A (en) * 1987-02-06 1988-08-17 Zanussi A Spa Industrie Domestic refrigerator and/or freezer appliance with closable back wall
JPH0743060A (ja) * 1993-07-30 1995-02-10 Sanyo Electric Co Ltd 冷蔵ショーケース
JP2000236998A (ja) * 1999-02-19 2000-09-05 Fukushima Industries Corp 冷蔵ショーケース

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 05 30 June 1995 (1995-06-30) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012095262A3 (fr) * 2011-01-13 2012-09-27 BSH Bosch und Siemens Hausgeräte GmbH Appareil de froid
CN103299143A (zh) * 2011-01-13 2013-09-11 Bsh博世和西门子家用电器有限公司 制冷器具
ITUB20152929A1 (it) * 2015-08-06 2017-02-06 Imat Spa Abbattitore di temperatura specificatamente per uso domestico
WO2017021822A1 (fr) * 2015-08-06 2017-02-09 I.M.A.T. S.P.A. Cellule de refroidissement rapide à usage domestique
CN107949759A (zh) * 2015-08-06 2018-04-20 优化生活创新中心公司 专用于家用用途的急速冷却器

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