CA2025030A1 - Liquid cryogenic freezer with improved vapor balance control - Google Patents

Liquid cryogenic freezer with improved vapor balance control

Info

Publication number
CA2025030A1
CA2025030A1 CA2025030A CA2025030A CA2025030A1 CA 2025030 A1 CA2025030 A1 CA 2025030A1 CA 2025030 A CA2025030 A CA 2025030A CA 2025030 A CA2025030 A CA 2025030A CA 2025030 A1 CA2025030 A1 CA 2025030A1
Authority
CA
Canada
Prior art keywords
enclosure
entrance
cryogen vapor
unit
cryogen
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.)
Granted
Application number
CA2025030A
Other languages
French (fr)
Other versions
CA2025030C (en
Inventor
Gary D. Lang
Benjamin Zyer
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.)
Liquid Carbonic Corp
Original Assignee
Liquid Carbonic Corp
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 Liquid Carbonic Corp filed Critical Liquid Carbonic Corp
Publication of CA2025030A1 publication Critical patent/CA2025030A1/en
Application granted granted Critical
Publication of CA2025030C publication Critical patent/CA2025030C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/001—Arrangement or mounting of control or safety devices for cryogenic fluid systems
    • 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
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
    • F25D3/11—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air with conveyors carrying articles to be cooled through the cooling space

Abstract

A cryogenic freezer apparatus for food products, including a thermally insulated enclosure and conveyor means for conveying products through the enclosure. A cryogen unit in the enclosure produces cryogen vapor near the enclosure entrance, and a blower unit is located in the enclosure adjacent the entrance thereof. The blower unit is selectively reconfigurable in response to a blower control signal to selectively direct cryogen vapor in varying directions, drawing cryogen vapor away from a first portion of the enclosure and blowing cryogen vapor toward a second portion of the enclosure. A photocell unit outside the enclosure, adjacent the entrance thereof, detects cryogen vapor exiting the enclosure entrance and generates at least one sensor output signal in response thereto, being indicative of the amount of cryogen vapor exiting. A control unit is coupled to the photocell unit and to the blower unit for generating a blower control signal in response to the sensor output signal so that, with increasing vapor detected outside the entrance of the enclosure, the blower unit draws cryogen vapor away from the enclosure entrance. Also, upon detecting a decreasing amount of cryogen vapor exiting from the entrance of the enclosure, the blower unit directs less cryogen vapor away from the enclosure entrance to assure that intrusion of the ambient environment through the enclosure entrance is prevented.
CA002025030A 1989-11-30 1990-09-11 Liquid cryogenic freezer with improved vapor balance control Expired - Fee Related CA2025030C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US443,903 1989-11-30
US07/443,903 US4955206A (en) 1989-11-30 1989-11-30 Liquid cryogen freezer with improved vapor balance control

Publications (2)

Publication Number Publication Date
CA2025030A1 true CA2025030A1 (en) 1991-05-31
CA2025030C CA2025030C (en) 1997-04-29

Family

ID=23762648

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002025030A Expired - Fee Related CA2025030C (en) 1989-11-30 1990-09-11 Liquid cryogenic freezer with improved vapor balance control

Country Status (2)

Country Link
US (1) US4955206A (en)
CA (1) CA2025030C (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5605049A (en) * 1991-09-13 1997-02-25 Air Products And Chemicals, Inc. Exhaust system for a cryogenic freezer
GB9217189D0 (en) * 1992-08-13 1992-09-23 Air Prod & Chem Control system for freezer
GB9402840D0 (en) * 1994-02-15 1994-04-06 Air Prod & Chem Tunnel freezer
US5816053A (en) * 1997-05-08 1998-10-06 Cloverdale Foods Company Apparatus and methods for cooling and tempering processed food products
US5966946A (en) * 1998-06-08 1999-10-19 Praxair Technology, Inc. Method and apparatus for retention of a refrigerant fluid in a refrigeration enclosure
US6334330B2 (en) 1999-07-26 2002-01-01 Praxair, Inc. Impingement cooler
FR2837563B1 (en) * 2002-03-21 2004-10-22 Air Liquide METHOD AND DEVICE FOR CONDUCTING A CRYOGENIC TUNNEL, ASSOCIATED CRYOGENIC TUNNEL
US6557367B1 (en) 2002-03-28 2003-05-06 Praxair Technology, Inc. Impingement cooler with improved coolant recycle
DE10218298A1 (en) * 2002-04-24 2003-11-06 Linde Ag Device for extracting gas from freezers
US20090019869A1 (en) * 2007-07-19 2009-01-22 Girard John M System and method for vapor control in cryogenic freezers
BRPI0815928A2 (en) * 2007-08-28 2017-05-16 Air Prod & Chem equipment for use with a system that has a cryogenic cooling component, method used with a system that has a cryogenic cooling component
BE1018767A5 (en) * 2009-06-02 2011-08-02 Devriese Peter DIAGONAL FAN.
US8904811B2 (en) * 2012-11-15 2014-12-09 Linde Aktiengesellschaft Baffle controlled oscillating flow freezer
US20170292764A1 (en) * 2016-04-12 2017-10-12 Michael D. Newman Cryogenic exhaust control system and freezer having same
EP3764030A1 (en) * 2019-07-11 2021-01-13 Air Liquide Deutschland GmbH Method and device for cooling products

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404989A (en) * 1964-03-09 1968-10-08 Hirtensteiner Walter Earl Method of freezing foods with liquid nitrogen
US3255608A (en) * 1964-06-18 1966-06-14 Elmwood Liquid Products Inc Liquid nitrogen immersion and spray freezing machine
US3485055A (en) * 1964-09-18 1969-12-23 Air Reduction Continuous freezer
US3553973A (en) * 1966-06-23 1971-01-12 Jack K Moran Continuous freezer
US3728869A (en) * 1971-12-27 1973-04-24 H Schmidt Coolant system for heat removal apparatus
US3824806A (en) * 1972-06-19 1974-07-23 Integral Process Syst Inc Apparatus for refrigerating articles
US3916640A (en) * 1974-06-10 1975-11-04 Ivan Rasovich Portable cryogenic fluid immersion-type freezer
FR2314457A1 (en) * 1975-06-12 1977-01-07 Air Liquide PROCESS AND INSTALLATION FOR REFRIGERATION OF A LOAD OF BULK OBJECTS
DE2651871C2 (en) * 1976-11-13 1984-12-06 Linde Ag, 6200 Wiesbaden Method and device for cooling objects or substances
US4086784A (en) * 1976-12-15 1978-05-02 Hollymatic Corporation Apparatus for refrigerating articles
US4086783A (en) * 1976-12-15 1978-05-02 Hollymatic Corporation Refrigerating chamber
US4276753A (en) * 1980-05-19 1981-07-07 Formax, Inc. Cryogenic freezing tunnel control system
DE3032088C2 (en) * 1980-08-26 1985-09-26 Linde Ag, 6200 Wiesbaden Device for storing frozen biological substances
US4403479A (en) * 1981-09-02 1983-09-13 Ivan Rasovich Quick freezing system
US4350027A (en) * 1981-10-05 1982-09-21 Lewis Tyree Jr Cryogenic refrigeration apparatus
SE8206627L (en) * 1982-11-22 1984-05-23 Sture Astrom freezing tunnel
US4475351A (en) * 1983-08-09 1984-10-09 Air Products And Chemicals, Inc. Dual-flow cryogenic freezer
US4627244A (en) * 1984-04-13 1986-12-09 Willhoft Edward Max Adolf Cryogenic cooling
US4528819A (en) * 1984-05-08 1985-07-16 Air Products And Chemicals, Inc. Exhaust control for cryogenic freezer
GB8417120D0 (en) * 1984-07-05 1984-08-08 Boc Group Plc Method for cooling/freezing
US4739623A (en) * 1987-06-11 1988-04-26 Liquid Carbonic Corporation Liquid cryogen freezer and method of operating same
US4800728A (en) * 1987-09-18 1989-01-31 Air Products And Chemicals, Inc. Method and apparatus for gas flow control in a cryogenic freezer
US4783972A (en) * 1987-10-29 1988-11-15 Liquid Carbonic Corporation N2 tunnel freezer
US4866946A (en) * 1988-08-05 1989-09-19 Air Products And Chemicals, Inc. Spiral cryogenic freezer

Also Published As

Publication number Publication date
US4955206A (en) 1990-09-11
CA2025030C (en) 1997-04-29

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Legal Events

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