EP1855071A2 - Procédé de refroidissement d'air continu pour affichages réfrigérant à température moyenne d'un équipement de magasin - Google Patents

Procédé de refroidissement d'air continu pour affichages réfrigérant à température moyenne d'un équipement de magasin Download PDF

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Publication number
EP1855071A2
EP1855071A2 EP07107903A EP07107903A EP1855071A2 EP 1855071 A2 EP1855071 A2 EP 1855071A2 EP 07107903 A EP07107903 A EP 07107903A EP 07107903 A EP07107903 A EP 07107903A EP 1855071 A2 EP1855071 A2 EP 1855071A2
Authority
EP
European Patent Office
Prior art keywords
evaporators
evaporator
air
defrosting
cooling
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Withdrawn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
EP07107903A
Other languages
German (de)
English (en)
Other versions
EP1855071A3 (fr
Inventor
Oleg Antonenko
Oleksandr Gudyma
Viktor Solovyov
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.)
Aisberg Ltd
Original Assignee
Aisberg 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
Application filed by Aisberg Ltd filed Critical Aisberg Ltd
Publication of EP1855071A2 publication Critical patent/EP1855071A2/fr
Publication of EP1855071A3 publication Critical patent/EP1855071A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • A47F3/0439—Cases or cabinets of the open type
    • A47F3/0443—Cases or cabinets of the open 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
    • 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
    • F25D17/067—Evaporator fan units
    • 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
    • F25D21/002—Defroster control
    • F25D21/008—Defroster control by timer
    • 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
    • F25D21/06—Removing frost
    • F25D21/12—Removing frost by hot-fluid circulating system separate from the refrigerant system
    • F25D21/125—Removing frost by hot-fluid circulating system separate from the refrigerant system the hot fluid being ambient air
    • 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
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • F25B2347/021—Alternate defrosting
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity

Definitions

  • This claimed invention relates to shop refrigeration equipment and specifically to medium-temperature gastronomic and multi-tier side open refrigerating displays intended for short-period storage, display and sale of unpacked preliminary cooled to storage temperature perishable foodstuffs such as salads, cookeries, sausages, cheeses, smoked and salted fish, meat, chickens, sea food, etc.
  • Preferred use is in shops, catering facilities and in big super- and hypermarkets.
  • a method of air cooling in medium-temperature refrigerating displays of shop equipment includes a continuous forced air cooling of the air cooler evaporator by means of fans using the air circulating within the cooled space of the display, and defrosting of frost-dew settling on the evaporator surface at regular intervals by cutting off a supply of the refrigerant to the evaporator in accordance with a signal given by its electronic unit to shut off its solenoid valve and remove the drip water.
  • the electronic unit After a temperature of the air cooler surface rises to + 3...+4°C, the electronic unit receives a signal from the temperature transducer and opens a solenoid valve thereby resuming the cooling process. Thereafter, the described sequence will reiterate.
  • a defective feature of this method is that temperature of the air coming into the cooled space increases to 12-15°C during the defrosting period in parallel with the increase of the air humidity.
  • the air contacting colder foodstuffs causes moisture to settle on the foodstuffs surface, which leads to intensive development of microorganisms. Defrosting process is lengthy and results in a considerable temperature increase within the cooled space, which impacts negatively the quality of foodstuffs.
  • a method of continuous air cooling is discovered that provides for two independent evaporators structurally designed in one unit and is accomplished both in medium-temperature and in low-temperatures cooled displays:
  • air cooling including temperature control
  • air cooler defrosting process in displays takes place in alternate, at intervals, with the aid of electronic units of various types in accordance with the preset program.
  • This method provides for a continuous simultaneous forced air cooling of two air cooler evaporators by means of two fans using the air circulating within the cooled space of the display and defrosting, in alternate and at regular intervals, of frost-dew settling on the evaporator surface by cutting-off a refrigerant supply to one of the evaporators in accordance with a signal given by its electronic unit to shut off its solenoid valve and remove the drip water.
  • This task is also achieved so that during the entire period of defrosting of one of the evaporators the refrigerant supply to the other (cooling) evaporator is being effected continuously by maintaining the compressor in a turned-on mode irrespective of the preset temperature control program. Thereby, deeper air cooling is achieved by the operating evaporator while the other evaporator is in the defrosting cycle, which compensates the air temperature rise due to defrosting of the other evaporator.
  • Fig. 1 presents a cross-section of the medium-temperature gastronomic refrigerating display in accordance with the claimed method.
  • Fig. 2 illustrates a diagram of the air cooling operating process.
  • Positions in Fig. 1 are: 1 - cooled space of the gastronomic display; 2 - additional cooled space for storing daily stock of foodstuffs; 3, 4 - temperature transducers of the evaporator surface; 5 - air intake; 6 -fan; 7, 9 -evaporators; 8 - partition; 10 - air flow distributor; 11, 13 - temperature control valves; 12, 14 - solenoid valves; 15, 16 - temperature transducers for air directed to the cooled space; 17 - perforated wall of the cooled space delivery duct of the display.
  • a method of continuous air cooling of the medium-temperature gastronomic refrigerating display with an air cooler is accomplished as follows. Upon turning on the refrigerating unit compressor (not shown in Fig. 1), electromagnetic valves 12 and 14 are open and let the refrigerant in evaporators 7 and 9; a fan 6 is switched on thereby blowing warmed air from the cooled space of the display 1 via air intake 5 and evaporators 7 and 9 so as to distribute it evenly between the evaporators by means of air distributor 10 (point 0 in Fig. 2) so that for some time both evaporators operate in the cooling mode.
  • Fan 6 continues to blow warmed air through both evaporators 7 and 9, evaporator 7 being defrosted as it acquires warmth of the circulating air thereby additionally cooling and humidifying such air. Melted water drips down to the display tray and to sewerage.
  • Evaporator 9 continues to cool the circulating air.
  • the proposed method allows of stabilizing temperature and humidity of air within the cooled space and of using smaller evaporators as compared to the embodiments of the method chosen as the prototype as the required cooling capacity is achieved by two evaporators simultaneously, and not by a single evaporator. Therefore, the cost of the air cooler can be considerably reduced.

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)
  • Defrosting Systems (AREA)
EP07107903A 2006-05-11 2007-05-10 Procédé de refroidissement d'air continu pour affichages réfrigérant à température moyenne d'un équipement de magasin Withdrawn EP1855071A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
UAA200605187A UA77925C2 (en) 2006-05-11 2006-05-11 Method for continuous air cooling in medium temperature refrigerated cases of trade equipment and air cooler for implementation thereof (variants)

Publications (2)

Publication Number Publication Date
EP1855071A2 true EP1855071A2 (fr) 2007-11-14
EP1855071A3 EP1855071A3 (fr) 2008-03-19

Family

ID=37725553

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07107903A Withdrawn EP1855071A3 (fr) 2006-05-11 2007-05-10 Procédé de refroidissement d'air continu pour affichages réfrigérant à température moyenne d'un équipement de magasin

Country Status (2)

Country Link
EP (1) EP1855071A3 (fr)
UA (1) UA77925C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3141846A1 (fr) * 2015-09-08 2017-03-15 Linde Aktiengesellschaft Coldstore cryogénique pour la conservation de produits chimiques, de matériaux biologiques et pharmaceutiques
CN106595200A (zh) * 2016-11-29 2017-04-26 青岛海尔股份有限公司 用于冷藏冷冻装置的门体及冷藏冷冻装置
CN112762658A (zh) * 2019-10-21 2021-05-07 青岛海尔电冰箱有限公司 冰箱存储间室的调节方法及其装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20072106A1 (it) * 2007-10-31 2009-05-01 Bravo Spa Impianto frigorifero

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572052A (en) * 1969-05-15 1971-03-23 Streater Ind Inc Ducted refrigeration unit
US4741171A (en) * 1986-03-15 1988-05-03 Sanden Corporation Refrigerated display cabinet
FR2778970A1 (fr) * 1998-05-25 1999-11-26 Austria Haus Technik Aktienges Procede et dispositif de degivrage par condensation et/ou sous-refroidissement de fluide frigorigene

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572052A (en) * 1969-05-15 1971-03-23 Streater Ind Inc Ducted refrigeration unit
US4741171A (en) * 1986-03-15 1988-05-03 Sanden Corporation Refrigerated display cabinet
FR2778970A1 (fr) * 1998-05-25 1999-11-26 Austria Haus Technik Aktienges Procede et dispositif de degivrage par condensation et/ou sous-refroidissement de fluide frigorigene

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3141846A1 (fr) * 2015-09-08 2017-03-15 Linde Aktiengesellschaft Coldstore cryogénique pour la conservation de produits chimiques, de matériaux biologiques et pharmaceutiques
CN106595200A (zh) * 2016-11-29 2017-04-26 青岛海尔股份有限公司 用于冷藏冷冻装置的门体及冷藏冷冻装置
CN112762658A (zh) * 2019-10-21 2021-05-07 青岛海尔电冰箱有限公司 冰箱存储间室的调节方法及其装置
CN112762658B (zh) * 2019-10-21 2022-08-23 青岛海尔电冰箱有限公司 冰箱存储间室的调节方法及其装置

Also Published As

Publication number Publication date
EP1855071A3 (fr) 2008-03-19
UA77925C2 (en) 2007-01-15

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