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1. (CA2080588) FOOD FREEZER

Office : Canada
Application Number: 2080588 Application Date: 06.05.1991
Publication Number: 2080588 Publication Date: 14.11.1991
Grant Number: Grant Date: 19.02.2002
Publication Kind : C
Prior PCT appl.: Application Number:US1991003095 ; Publication Number: Click to see the data
IPC:
F25D 17/02
A23L 3/36
F25B 7/00
F25B 25/00
F25B 41/00
F25D 13/06
F25D 25/02
F25B 9/00
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
D
REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS
17
Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
02
for circulating liquids, e.g. brine
A HUMAN NECESSITIES
23
FOODS OR FOODSTUFFS; THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
L
FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D91; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
3
Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
36
Freezing; Subsequent thawing; Cooling
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
B
REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
7
Compression machines, plant, or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
B
REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
25
Machines, plant, or systems, using a combination of modes of operation covered by two or more of the groups F25B1/-F25B23/160
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
B
REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
41
Fluid-circulation arrangements, e.g. for transferring liquid from evaporator to boiler
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
D
REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS
13
Stationary devices associated with refrigerating machinery, e.g. cold rooms
06
with conveyers carrying articles to be cooled through the cooling space
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
D
REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS
25
Charging, supporting, or discharging the articles to be cooled
02
by shelves
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
B
REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
9
Compression machines, plant, or systems, in which the refrigerant is air or other gas of low boiling point
Applicants: LIQUID CARBONIC CORPORATION
Inventors: GYGER, ROGER FREDERICK
LANG GARY DEE
BURGERS, KENNETH LEROY
Priority Data: 520,773 08.05.1990 US
Title: (EN) FOOD FREEZER
(FR) CONGELATEUR D'ALIMENTS
Abstract: front page image
(EN) A food freezer'(10) having a mechanical refrigeration system (54) comprising first (56) and second (58) closed-loop fluid circuits, wherein the first fluid circuit (56) employs carbon dioxide as its refrigerant and transfers heat to the second fluid circuit (58), which in turn transfers heat to the environment or to another fluid circuit. In the first fluid circuit evaporator (60), carbon dioxide is maintained at pressures between 60.4 psig and 120 psig. In a preferred embodiment of the invention, the freezer (10) employs at least two separate blowers (44); (86) or fans for circulation of air or other gas in the freezer enclosure. One blower/fan (44) operates continuously to maintain circulation of cold air or gas in the freezer (10). The other blower/fan (86) operates inter- mittently or at variable speeds to vary air flow across the evaporator (60), and thereby increase or decrease heat transfer from the freezer (10) interior to the first fluid circuit evaporator (60) to maintain the freezer (10) interior at a desired temperature or within a desired temperature range.


Also published as:
EP0527856AU1991077952WO/1991/017400