WO2004036128A1 - Refrigeration apparatus - Google Patents

Refrigeration apparatus Download PDF

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Publication number
WO2004036128A1
WO2004036128A1 PCT/EP2003/011333 EP0311333W WO2004036128A1 WO 2004036128 A1 WO2004036128 A1 WO 2004036128A1 EP 0311333 W EP0311333 W EP 0311333W WO 2004036128 A1 WO2004036128 A1 WO 2004036128A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
compartment
refrigeration apparatus
evaporator
storing
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.)
Ceased
Application number
PCT/EP2003/011333
Other languages
French (fr)
Inventor
Wilhelmus Adrianus Theodorus Uijen
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.)
Hindustan Unilever Ltd
Unilever NV
Original Assignee
Hindustan Lever Ltd
Unilever NV
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 Hindustan Lever Ltd, Unilever NV filed Critical Hindustan Lever Ltd
Priority to BR0314560-3A priority Critical patent/BR0314560A/en
Priority to EP03808724A priority patent/EP1554530B1/en
Priority to AU2003301315A priority patent/AU2003301315B2/en
Priority to MXPA05003940A priority patent/MXPA05003940A/en
Priority to DE60303615T priority patent/DE60303615T2/en
Priority to CA002501407A priority patent/CA2501407A1/en
Publication of WO2004036128A1 publication Critical patent/WO2004036128A1/en
Anticipated expiration legal-status Critical
Ceased 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • 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
    • 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
    • F25D2400/10—Refrigerator top-coolers
    • 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
    • F25D29/00—Arrangement or mounting of control or safety devices

Definitions

  • the present invention refers to a refrigeration apparatus of the type comprising at least a first compartment and at least a second compartment that are cooled down at different temperatures, as well as a temperature balancing device adapted to ensure a correct operation of the apparatus.
  • Refrigerating apparatuses used as display cabinets, in stores and shops, are well known wherein a single compartment is maintained at a certain temperature by a refrigerating circuit comprising a single compressor and at least one evaporator.
  • a refrigerating circuit comprising a single compressor and at least one evaporator.
  • These apparatuses are equipped with a door which can be either vertical, in the case of a 'cupboard like' cabinets, or horizontal, in the case of a 'flat-top' cabinet such as described in US3,729,243. In any case the door is transparent to allow for potential customers to see what is inside the display cabinet.
  • Refrigeration apparatuses are well-known in the art which comprise a refrigerating circuit provided with a single compressor and two evaporators arranged in series and associated to a refrigerated compartment and a freezer compartment, respectively.
  • Automatic control means enable the refrigerated compartment temperature to be set and the compressor to be caused to operate cyclically in order to keep respective pre-determined temperature ranges in the two compartments.
  • a temperature balancing device can be adapted in the cold storage compartment to artificially heat up the cold storage compartment when the ambient temperature is excessively low, in such a manner as to increase the rate of the operation cycles of the compressor, thereby preventing the temperature in the freezer compartment from increasing.
  • Such devices require the use of two evaporators, one in each compartment .
  • a first compartment at a temperature TI the first compartment being accessible through at least an opening
  • a second compartment at a temperature T2 TI being colder than T2
  • TI and T2 being colder than Te
  • a refrigeration circuit in the first compartment adapted to keep temperature TI within a range Rl through a sequence of energisation and de-energisation phases triggered by comparing actual temperature TI with a first reference temperature Tlr,
  • heating means in the second compartment adapted to keep temperature T2 within a range R2.
  • This apparatus allows for storing at two different temperatures, both lower than the temperature Te of the room in which the apparatus is located.
  • the opening in the first compartment can either be on the top of the first compartment or on a side face of it. If it is on the top, it does not need a door or a lid (open top freezer) , if it is on a side, it is preferable to have the opening closed by a door.
  • the second compartment can be accessed either though an opening, or through a door.
  • the refrigeration circuit comprises an evaporator, the evaporator being connected to a compressor located outside the first compartment. More preferably the second compartment does not contain an evaporator.
  • the second compartment door is transparent.
  • the heating means are triggered by comparing the actual temperature T2 with a second reference temperature T2r, thus keeping temperature T2 within a range R2.
  • the reference temperatures Tlr and T2r are set by means of control means.
  • Tlr is comprised between -16 to -23°C and wherein T2r is comprised between -15°C and +5°C, preferably below 0°C even more preferably below -5°C.
  • a storing volume adapted to receive products to be stored at a temperature below 0 C (preferably between -16°C and -23°C) , an evaporator within said storing volume and a compressor located outside said storing volume, .
  • a storing box adapted to receive products to be stored at a temperature above the temperature in the storing volume (preferably between -15°C and +5°C, more preferably below 0°C, even more preferably below -5°C) , located within the storing volume, said box being fitted with heating means .
  • the evaporator in the first compartment can be isolated from the rest of the compartment by a wall.
  • means are provided for forcing air located in the first compartment to pass in the volume limited by the wall wherein the evaporator is located, thus cooling this air.
  • the refrigeration apparatus is of the type comprising a freezer compartment 1 and a cold storage compartment 2.
  • the two compartments 1 and 2 are thermally insulated.
  • their walls comprise insulating material having a thermal conductivity in the range of 0.5 to 50 milliwatt (meter Kelvin) "1 .
  • the insulating material can be, for example, polystyrene, fibreglass, or vacuum.
  • the freezer compartment 1 is fitted with an evaporator 5 connected to a compressor 6. Through a sequence of switch on and switch off periods, the freezer compartment 1 is kept at a temperature TI. The switch ons and switch offs are triggered by comparing the actual temperature TI in the freezer compartment with a reference temperature Tlr which can be set by means of control means not represented.
  • the freezer compartment is accessed through an opening 10 which can either be closed by a door or a lid, or left open (open top freezer) .
  • the cold storage compartment 2 is fitted with heating means 7, a fan 8 and a door or a lid 9.
  • the cold storage compartment is maintained at a temperature T2, higher than TI, by the heating means 7 which are triggered by comparing the actual temperature T2 with a reference temperature T2r which can be set by means of control means not represented.
  • an existing freezer for example of the open top type, can be fitted with a box, said box being itself fitted with heating means 7, a fan 8 and a door or lid 9.
  • an existing freezer can easily be fitted with additional means which allow for the creation of two compartments operating at two different temperatures without the need for an additional refrigeration circuit.
  • temperature TI in the first compartment is maintained at a set temperature by the evaporator 5 and the compressor 6.
  • temperature T2 in the second compartment is brought down.
  • heating means 7 and fan 8 are activated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

A refrigeration apparatus with two compartments (1, 2) operating at two different temperatures wherein a freezer comprising a storing volume adapted to receive products to be stored at a temperature below 0oC, an evaporator (5) within said storing volume and a compressor (6) located outside said storing volume, is fitted with a storing box, adapted to receive products to be stored at a temperature above the temperature in the storing volume, located within the storing volume, said box being fitted with heating means (7).

Description

REFRIGERATION APPARATUS
Field of the invention
The present invention refers to a refrigeration apparatus of the type comprising at least a first compartment and at least a second compartment that are cooled down at different temperatures, as well as a temperature balancing device adapted to ensure a correct operation of the apparatus.
Background of the invention
Refrigerating apparatuses, used as display cabinets, in stores and shops, are well known wherein a single compartment is maintained at a certain temperature by a refrigerating circuit comprising a single compressor and at least one evaporator. These apparatuses are equipped with a door which can be either vertical, in the case of a 'cupboard like' cabinets, or horizontal, in the case of a 'flat-top' cabinet such as described in US3,729,243. In any case the door is transparent to allow for potential customers to see what is inside the display cabinet.
More and more products are now displayed in such cabinets while they may have different storage temperature.
There is therefore a need for refrigerating apparatus of the display cabinet type which can be used for simultaneously storing products at different temperatures.
Refrigeration apparatuses are well-known in the art which comprise a refrigerating circuit provided with a single compressor and two evaporators arranged in series and associated to a refrigerated compartment and a freezer compartment, respectively. Automatic control means enable the refrigerated compartment temperature to be set and the compressor to be caused to operate cyclically in order to keep respective pre-determined temperature ranges in the two compartments.
A temperature balancing device can be adapted in the cold storage compartment to artificially heat up the cold storage compartment when the ambient temperature is excessively low, in such a manner as to increase the rate of the operation cycles of the compressor, thereby preventing the temperature in the freezer compartment from increasing.
Such devices require the use of two evaporators, one in each compartment .
There is thus a need for refrigerating apparatuses of the display cabinet type presenting two compartments at two different temperatures, while requiring only evaporator means in one compartment .
It therefore is a purpose of the present invention to minimise the drawbacks of such prior-art solutions.
Summary description of the invention
It is a first object of the invention to provide a refrigeration apparatus, situated in an environment at temperature Te, comprising;
. a first compartment at a temperature TI, the first compartment being accessible through at least an opening , and . a second compartment at a temperature T2, TI being colder than T2, TI and T2 being colder than Te, the second compartment being located inside the first compartment,
. a refrigeration circuit in the first compartment adapted to keep temperature TI within a range Rl through a sequence of energisation and de-energisation phases triggered by comparing actual temperature TI with a first reference temperature Tlr,
. heating means in the second compartment adapted to keep temperature T2 within a range R2.
This apparatus allows for storing at two different temperatures, both lower than the temperature Te of the room in which the apparatus is located.
The opening in the first compartment can either be on the top of the first compartment or on a side face of it. If it is on the top, it does not need a door or a lid (open top freezer) , if it is on a side, it is preferable to have the opening closed by a door. The second compartment can be accessed either though an opening, or through a door.
Preferably, the refrigeration circuit comprises an evaporator, the evaporator being connected to a compressor located outside the first compartment. More preferably the second compartment does not contain an evaporator.
Preferably also, the second compartment door is transparent.
In a preferred embodiment of the invention, the heating means are triggered by comparing the actual temperature T2 with a second reference temperature T2r, thus keeping temperature T2 within a range R2. In a particularly preferred embodiment of the invention, the reference temperatures Tlr and T2r are set by means of control means. Tlr is comprised between -16 to -23°C and wherein T2r is comprised between -15°C and +5°C, preferably below 0°C even more preferably below -5°C.
It is a second object of the present invention to provide a process for manufacturing a refrigeration apparatus according to the invention wherein a freezer;
. comprising a storing volume adapted to receive products to be stored at a temperature below 0 C (preferably between -16°C and -23°C) , an evaporator within said storing volume and a compressor located outside said storing volume, . is fitted with a storing box, adapted to receive products to be stored at a temperature above the temperature in the storing volume (preferably between -15°C and +5°C, more preferably below 0°C, even more preferably below -5°C) , located within the storing volume, said box being fitted with heating means .
The evaporator in the first compartment can be isolated from the rest of the compartment by a wall. In this case means are provided for forcing air located in the first compartment to pass in the volume limited by the wall wherein the evaporator is located, thus cooling this air.
It is therefore possible, starting from a standard freezer such as those used as display cabinets to create two compartments which can be maintained at two different temperatures, thus allowing storing products at two different temperatures without having to dispose of the original freezer. Detailed description of the invention
The present invention will be further described by reference to the drawings wherein the sole figure represents a schematic view of a refrigeration apparatus according to the invention.
As disclosed in Figure 1, the refrigeration apparatus according to the present invention is of the type comprising a freezer compartment 1 and a cold storage compartment 2. In a known manner, the two compartments 1 and 2 are thermally insulated. Preferably, their walls comprise insulating material having a thermal conductivity in the range of 0.5 to 50 milliwatt (meter Kelvin)"1. The insulating material can be, for example, polystyrene, fibreglass, or vacuum.
The freezer compartment 1 is fitted with an evaporator 5 connected to a compressor 6. Through a sequence of switch on and switch off periods, the freezer compartment 1 is kept at a temperature TI. The switch ons and switch offs are triggered by comparing the actual temperature TI in the freezer compartment with a reference temperature Tlr which can be set by means of control means not represented.
The freezer compartment is accessed through an opening 10 which can either be closed by a door or a lid, or left open (open top freezer) .
The cold storage compartment 2 is fitted with heating means 7, a fan 8 and a door or a lid 9. The cold storage compartment is maintained at a temperature T2, higher than TI, by the heating means 7 which are triggered by comparing the actual temperature T2 with a reference temperature T2r which can be set by means of control means not represented. As can be seen in Figure 1, an existing freezer, for example of the open top type, can be fitted with a box, said box being itself fitted with heating means 7, a fan 8 and a door or lid 9. Thus an existing freezer can easily be fitted with additional means which allow for the creation of two compartments operating at two different temperatures without the need for an additional refrigeration circuit.
In operation, temperature TI in the first compartment is maintained at a set temperature by the evaporator 5 and the compressor 6. Through heat exchange with the second compartment, temperature T2 in the second compartment is brought down. When this temperature reaches a reference temperature, heating means 7 and fan 8 are activated.

Claims

Claim
1. Refrigeration apparatus, situated in an environment at temperature Te, comprising;
. a first compartment at a temperature TI, the first compartment being accessible through at least an opening, and . a second compartment at a temperature T2, TI being colder than T2, TI and T2 being colder than Te, the second compartment being located inside the first compartment, . a refrigeration circuit in the first compartment adapted to keep temperature TI within a range Rl through a sequence of energisation and de-energisation phases triggered by comparing temperature TI with a first reference temperature Tlr, . heating means in the second compartment adapted to keep temperature T2 within a range R2.
2. Refrigeration apparatus according to claim 1, wherein the refrigeration circuit comprises an evaporator, the evaporator being connected to a compressor located outside the first compartment .
3. Refrigeration apparatus according to claim 2 wherein the second compartment does not contain an evaporator.
4. Refrigeration apparatus according to claim 1 wherein the heating means are triggered by comparing the actual temperature T2 with a second reference temperature T2r.
5. Refrigeration apparatus according to claim 4 wherein the reference temperatures Tlr and T2r are set by means of control means .
6. Refrigeration apparatus according to claim 5 wherein Tlr is comprised between -16 to -23°C and wherein T2r is comprised between -15°C and +5°C.
7. Process for providing a refrigeration apparatus according to any preceding claim wherein a freezer;
. comprising a storing volume adapted to receive products to be stored at a temperature below 0°C, an evaporator within said storing volume and a compressor located outside said storing volume,
. is fitted with a storing box, adapted to receive products to be stored at a temperature above the temperature in the storing volume, located within the storing volume, said box being fitted with heating means.
PCT/EP2003/011333 2002-10-17 2003-10-14 Refrigeration apparatus Ceased WO2004036128A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BR0314560-3A BR0314560A (en) 2002-10-17 2003-10-14 Refrigeration apparatus and process for the production of refrigeration apparatus
EP03808724A EP1554530B1 (en) 2002-10-17 2003-10-14 Refrigeration apparatus
AU2003301315A AU2003301315B2 (en) 2002-10-17 2003-10-14 Refrigeration apparatus
MXPA05003940A MXPA05003940A (en) 2002-10-17 2003-10-14 Refrigeration apparatus.
DE60303615T DE60303615T2 (en) 2002-10-17 2003-10-14 COOLER
CA002501407A CA2501407A1 (en) 2002-10-17 2003-10-14 Refrigeration apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02257199.6 2002-10-17
EP02257199 2002-10-17

Publications (1)

Publication Number Publication Date
WO2004036128A1 true WO2004036128A1 (en) 2004-04-29

Family

ID=32104002

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/011333 Ceased WO2004036128A1 (en) 2002-10-17 2003-10-14 Refrigeration apparatus

Country Status (11)

Country Link
US (1) US6854288B2 (en)
EP (1) EP1554530B1 (en)
AT (1) ATE317964T1 (en)
AU (1) AU2003301315B2 (en)
BR (1) BR0314560A (en)
CA (1) CA2501407A1 (en)
DE (1) DE60303615T2 (en)
ES (1) ES2258742T3 (en)
MX (1) MXPA05003940A (en)
WO (1) WO2004036128A1 (en)
ZA (1) ZA200502917B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8151588B2 (en) 2008-01-18 2012-04-10 Conopco, Inc. Apparatus and method for displaying and dispensing frozen edible products

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX2014015092A (en) 2012-06-29 2015-03-05 Unilever Nv Display cabinets for frozen products.
CN111493593B (en) * 2020-04-27 2021-09-03 海信容声(广东)冷柜有限公司 Refrigerated display cabinet and control method thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1434356A (en) * 1972-09-16 1976-05-05 Hillier C N Temperature controlled cabinets
EP0509476A2 (en) * 1991-04-18 1992-10-21 MERLONI ELETTRODOMESTICI S.p.A. Refrigerating apparatus
US5388427A (en) * 1992-09-23 1995-02-14 Samsung Electronics Co., Ltd. Refrigerator with kimchi compartment
EP0798521A2 (en) * 1996-03-29 1997-10-01 AEG Hausgeräte GmbH Temperature control for refrigeration apparatus
US5782106A (en) * 1995-12-29 1998-07-21 Lg Electronics Inc. refrigerator having warmer compartment
US6092382A (en) * 1994-12-08 2000-07-25 Gronne's Miljo Aps Kitchen unit and the use thereof for the handling or portions of kitchen garbage at the source
EP1074802A2 (en) * 1999-08-05 2001-02-07 CANDY S.p.A. Refrigerator with compartment for the quick cooling of food
EP1245918A2 (en) * 2001-03-26 2002-10-02 Samsung Electronics Co., Ltd. Apparatus for controlling the temperature of foodstuffs

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3729243A (en) * 1971-06-07 1973-04-24 Umc Ind Merchandising cabinet

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1434356A (en) * 1972-09-16 1976-05-05 Hillier C N Temperature controlled cabinets
EP0509476A2 (en) * 1991-04-18 1992-10-21 MERLONI ELETTRODOMESTICI S.p.A. Refrigerating apparatus
US5388427A (en) * 1992-09-23 1995-02-14 Samsung Electronics Co., Ltd. Refrigerator with kimchi compartment
US6092382A (en) * 1994-12-08 2000-07-25 Gronne's Miljo Aps Kitchen unit and the use thereof for the handling or portions of kitchen garbage at the source
US5782106A (en) * 1995-12-29 1998-07-21 Lg Electronics Inc. refrigerator having warmer compartment
EP0798521A2 (en) * 1996-03-29 1997-10-01 AEG Hausgeräte GmbH Temperature control for refrigeration apparatus
EP1074802A2 (en) * 1999-08-05 2001-02-07 CANDY S.p.A. Refrigerator with compartment for the quick cooling of food
EP1245918A2 (en) * 2001-03-26 2002-10-02 Samsung Electronics Co., Ltd. Apparatus for controlling the temperature of foodstuffs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8151588B2 (en) 2008-01-18 2012-04-10 Conopco, Inc. Apparatus and method for displaying and dispensing frozen edible products

Also Published As

Publication number Publication date
ATE317964T1 (en) 2006-03-15
EP1554530A1 (en) 2005-07-20
US6854288B2 (en) 2005-02-15
CA2501407A1 (en) 2004-04-29
AU2003301315A1 (en) 2004-05-04
ZA200502917B (en) 2006-06-28
MXPA05003940A (en) 2005-06-17
ES2258742T3 (en) 2006-09-01
AU2003301315B2 (en) 2007-06-07
US20040112081A1 (en) 2004-06-17
DE60303615D1 (en) 2006-04-20
EP1554530B1 (en) 2006-02-15
BR0314560A (en) 2005-08-09
DE60303615T2 (en) 2006-08-10

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