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NZ755681B2 - Vapor pressure control system - Google Patents
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NZ755681B2 - Vapor pressure control system - Google Patents

Vapor pressure control system

Info

Publication number
NZ755681B2
NZ755681B2 NZ755681A NZ75568118A NZ755681B2 NZ 755681 B2 NZ755681 B2 NZ 755681B2 NZ 755681 A NZ755681 A NZ 755681A NZ 75568118 A NZ75568118 A NZ 75568118A NZ 755681 B2 NZ755681 B2 NZ 755681B2
Authority
NZ
New Zealand
Prior art keywords
aging
food product
dew point
controlling
dry bulb
Prior art date
Application number
NZ755681A
Other versions
NZ755681A (en
Inventor
David Sandelman
Original Assignee
David Sandelman
Filing date
Publication date
Priority claimed from US15/414,716 external-priority patent/US10674752B2/en
Application filed by David Sandelman filed Critical David Sandelman
Priority to NZ796202A priority Critical patent/NZ796202B2/en
Publication of NZ755681A publication Critical patent/NZ755681A/en
Publication of NZ755681B2 publication Critical patent/NZ755681B2/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B11/00—Preservation of milk or dairy products
    • A23B11/60—Preservation of cheese or cheese preparations
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/003—Control or safety devices for sterilisation or pasteurisation systems
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B4/00—Preservation of meat, sausages, fish or fish products
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B4/00—Preservation of meat, sausages, fish or fish products
    • A23B4/03—Drying; Subsequent reconstitution
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; PREPARATION THEREOF
    • A23C19/00—Cheese; Cheese preparations; Making thereof
    • A23C19/14—Treating cheese after having reached its definite form, e.g. ripening or smoking
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
    • 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
    • F25D17/042—Air treating means within refrigerated spaces
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/041—Treating air flowing to refrigeration compartments by purification
    • F25D2317/0411—Treating air flowing to refrigeration compartments by purification by dehumidification
    • F25D2317/04111—Control means therefor
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/10—Sensors measuring the temperature of the evaporator
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F26B21/08—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects

Abstract

system to control the conditions of an aging room for food in which independent feedback loops control the dry bulb temperature and the dew point while controlling the difference between the vapor pressure in the room and the vapor pressure of the food stuff being aged, thereby controlling the "aging" of the food stuff and its quality.

Claims (12)

CLAIMS :
1. A system for controlling the aging of a food product having a specific vapor pressure by ting moisture from said food product in a controlled manner to dry and cure said food product, said food product located within an aging room, said system comprising: a first sensor to determine the temperature in said aging room, a second sensor to ine the vapor pressure in said aging room, and a controller responsive to the vapor pressure in said aging room with respect to the vapor pressure of the food product to control the aging of said food product, a user interface for setting the dry bulb temperature condition and the dew point condition to obtain a desired relative humidity in the aging room, wherein the controller comprises a dry bulb ature control loop that, responsive to the dry bulb temperature set by the user interface controls the dry bulb temperature of the air in the aging room and a dew point control loop that, responsive to the dew point ion set by the user interface, controls the dew point of the air in the aging room, wherein the controller es the dry bulb temperature control loop and the dew point control loop independently, wherein the first sensor is a dry bulb temperature sensor and the second sensor is a dew point , and wherein said aging room comprises cooling coils, said sensed vapor pressure in said aging room controlling the temperature of said cooling coils, said controller responsive to the sensed dry bulb temperature in said aging room controlling a blower to control the airflow across said cooling coils.
2. A system for controlling the aging of a food product according to claim 1, wherein said controller controls the onship n the vapor pressure of said food product and the aging room vapor pressure.
3. A system for controlling the aging of a food product ing to claim 1, wherein said system removes water vapor from said aging room to relieve the vapor pressure of said aging room.
4. A system for controlling the aging of a food product according to claim 1, wherein the dry bulb temperature control loop and the dew point control loop are PID control loops.
5. A system for controlling the aging of a food product ing to claim 1, further comprising a surface sensor located on said cooling coil, said surface sensor monitoring the temperature of said g coil.
6. A system for controlling the aging of a food product according to claim 5, wherein an error signal in said dry bulb control loop is connected to effect said dew point control loop.
7. A system for controlling the aging of a food product according to claim 1, further comprising a computer system responsive to a ion of small latent load while there is a sensible load, said computer system lling the temperature of said cooling coils.
8. A system for controlling the drying and aging of a food product having a specific vapor pressure, said food product located within an aging room, said system comprising: a first sensor to determine a dry bulb temperature in said aging room, a second sensor to determine a dew point value in said aging room, and a controller responsive to the dew point value in said aging room with respect to the vapor pressure of the food product to control the aging of said food product, wherein said ller comprises two independent PID control loops, one of said two PID control loops controls the dry bulb temperature and the other of said two PID control loops controls said dew point value, and wherein said system comprises cooling coils, said controller responsive to the dew point value in said aging room controlling the temperature of said cooling coils, wherein said system further ses a fan, said controller also responsive to the dry bulb temperature to control the air flow through the said cooling coils with said fan, wherein said system comprises a compensator which communicates an error signal in said dry bulb l loop to bias the dew point l loop set point value.
9. The system for controlling the aging of a food t according to claim 8, wherein said controller s water vapor from said aging room to relieve the vapor pressure of said aging room.
10. The system for controlling the aging of a food product according to claim 8 or 9, further comprising a e sensor located on said cooling coil, said surface sensor monitoring the temperature of said cooling coil.
11. The system for controlling the aging of a food product according to claim 8, 9 or 10, wherein said controller is responsive to a condition of no latent load while there is a le load, said controller controlling the temperature of said cooling coils.
12. The system for controlling the drying and aging of a food product according to any one of claims 8 to 11, wherein said system simultaneously controls the temperature of said cooling coils to control the dew point value and at the same time controls the air flow across said cooling coils to control the dry bulb temperature and dew point to be at substantially constant values. u H Q00.” l3m>Eon.law l2w>I58Em 063 n=n_ 0E EBm esm m 26D .owcww be howcmm b?cmEm?azw 9535. b?cm?manaw “$1a< V_E_._ Uwconmucoo womnw Start Record Present Dew Point Load and start al Timer Dew Point Exceeded hange Limi . No Has timer Clear Interval Expired? Timer Ctear Recorded Dew Point Add offset to Clear Output uniting ooil output Offset Value value FIG. 2
NZ755681A 2018-01-24 Vapor pressure control system NZ755681B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NZ796202A NZ796202B2 (en) 2018-01-24 Vapor Pressure Control System

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15/414,716 US10674752B2 (en) 2016-02-04 2017-01-25 Vapor pressure control system
PCT/US2018/014938 WO2018140424A1 (en) 2017-01-25 2018-01-24 Vapor pressure control system

Publications (2)

Publication Number Publication Date
NZ755681A NZ755681A (en) 2025-03-28
NZ755681B2 true NZ755681B2 (en) 2025-07-01

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