EP2850372A1 - Surveillance et régulation de la température d'une cargaison pour un conteneur réfrigéré - Google Patents

Surveillance et régulation de la température d'une cargaison pour un conteneur réfrigéré

Info

Publication number
EP2850372A1
EP2850372A1 EP13712629.8A EP13712629A EP2850372A1 EP 2850372 A1 EP2850372 A1 EP 2850372A1 EP 13712629 A EP13712629 A EP 13712629A EP 2850372 A1 EP2850372 A1 EP 2850372A1
Authority
EP
European Patent Office
Prior art keywords
cargo
temperature
refrigeration unit
temperature sensors
container
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
EP13712629.8A
Other languages
German (de)
English (en)
Other versions
EP2850372B1 (fr
Inventor
Kenneth Cresswell
Yu H. Chen
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.)
Carrier Corp
Original Assignee
Carrier 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 Carrier Corp filed Critical Carrier Corp
Publication of EP2850372A1 publication Critical patent/EP2850372A1/fr
Application granted granted Critical
Publication of EP2850372B1 publication Critical patent/EP2850372B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/74—Large containers having means for heating, cooling, aerating or other conditioning of contents
    • B65D88/748—Large containers having means for heating, cooling, aerating or other conditioning of contents for tank containers
    • 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
    • F25D11/003—Transport containers
    • 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
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or 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
    • F25D2500/00—Problems to be solved
    • F25D2500/04—Calculation of parameters
    • 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
    • F25D2700/123—Sensors measuring the inside temperature more than one sensor measuring the inside temperature in a compartment

Definitions

  • the subject matter disclosed herein relates to refrigeration systems. More specifically, the subject matter disclosed herein relates to refrigeration of containers utilized to store and ship cargo.
  • a typical refrigerated cargo container such as those utilized to transport a cargo via sea, rail or road, is a container modified to include a refrigeration unit located at one end of the container.
  • the refrigeration unit includes a compressor, condenser, expansion valve and evaporator coil, all located at the end of the container.
  • a volume of refrigerant circulates throughout the refrigeration unit, and one or more evaporator fans of the refrigeration unit blow a flow of air across the evaporator coil cooling the air and forcing it out into the container.
  • the cooled air in typical container system is forced out of the refrigeration unit and along a floor of the container. As the cooled air travels away from the refrigeration unit, its temperature increases and it rises in the container and eventually returns to the refrigeration unit. Temperature of this return air is sensed at the refrigeration unit. This sensed supply air temperature is used by a refrigeration unit control system to determine various settings of the refrigeration unit including switching the compressor on or off, setting the fan speed to high or low or off, or other settings that determine a temperature of the air exiting the refrigeration unit into the container.
  • a method of monitoring and controlling temperature of a cargo in a refrigerated transportation cargo container includes measuring a temperature of a plurality of portions of the cargo located in the cargo container via a plurality of temperature sensors directed at the portions of the cargo. One or more of the measured cargo temperatures are compared to a preselected cargo temperature threshold. Operation of a refrigeration unit disposed at the cargo container in operable communication with the plurality of temperature sensors is changed based on a result of the comparison.
  • a transportation cargo container refrigeration system includes a plurality of cargo temperature sensors configured to determine a temperature of at least portions of a cargo.
  • the system further includes a refrigeration unit, and a controller operably connected to the refrigeration unit and the plurality of noncontact cargo temperature sensors to control operation of the refrigeration unit based on data received from the plurality of cargo temperature sensors.
  • a refrigerated transportation cargo container includes a transportation cargo container and a refrigeration unit configured to cool the cargo container.
  • a plurality of cargo temperature sensors are located in the cargo container to determine a temperature of the cargo.
  • a controller is operably connected to the refrigeration unit and the plurality of noncontact cargo temperature sensors to control operation of the refrigeration unit based on data received from the plurality of cargo temperature sensors.
  • FIG. 1 a cutaway view of an embodiment of a refrigerated cargo container
  • FIG. 2 is a block diagram of an embodiment of a method for monitoring and controlling a cargo temperature in a container.
  • FIG. 1 Shown in FIG. 1 is an embodiment of a refrigerated cargo container 10.
  • the cargo container 10 is configured to maintain a cargo 12 located inside the cargo container 10 at a selected temperature through the use of a refrigeration unit 14 located at the container 10.
  • the cargo container 10 is mobile and is utilized to transport the cargo 12 via, for example, a truck, a train or a ship.
  • the refrigeration unit 14 includes (as schematically shown in FIG. 1) a compressor 16, a condenser 18, an expansion valve 20, an evaporator 22 and an evaporator fan 24 located at, for example, a first end 26 of the container 10.
  • the refrigeration unit 14 flows return airflow 28 across the evaporator 22 via the evaporator fan 24, thus cooling the airflow 28 to a selected temperature and urges the cooled return airflow 28 through a refrigeration unit outlet 30 into the container 10 to cool the cargo 12.
  • the return airflow 28 may also be supplemented with a fresh airflow 32 introduced to the refrigeration unit 14 via a fresh air inlet 34.
  • the container 10 further includes a second end 36 located opposite the first end 26, and two sidewalls 38, a floor 40 and a roof 44 located between the first end 26 and the second end 36.
  • Operation of the refrigeration unit 14 is controlled by a controller 46, which directs such functions of the refrigeration unit 14 as switching the compressor 16 on or off, operation of and speed of the evaporator fan 24, and operation of and speed of a fresh air fan (not shown), used to introduce fresh air into the refrigeration unit 14.
  • the controller 46 operates the refrigeration unit 14 to maintain a selected cargo temperature of the cargo 12.
  • the cargo temperature sensors 50 may be noncontact sensors, for example, thermal cameras, laser temperature sensors, or the like. In other embodiments, the cargo temperature sensors 50 may be temperature probes or contact sensors, such as thermocouples, placed at the cargo 12. The cargo temperature sensors 50 are utilized to determine the cargo temperature, rather than the temperature of the airflow in the container 10, so that refrigeration unit 14 can be more accurately and beneficially managed by the controller 46.
  • the plurality of cargo temperature sensors 50 each sense a cargo temperature. These cargo temperatures are transmitted to the controller 46, to which the plurality of cargo temperature sensors 50 are operably connected, in step 54.
  • the controller 46, or a processor of the controller 46 may manipulate the data provided by the cargo temperature sensors 50, for example, the cargo temperatures provided by the cargo temperature sensors 50 may be averaged, resulting in an average cargo temperature.
  • the average cargo temperature is compared to a selected average cargo temperature, or "set point". This set point is a temperature desired for the cargo 12 to minimize undesirable effects on the cargo 12, for example, thawing, spoilage or the like.
  • the set point may include a threshold band around it, for example, a certain number of degrees greater and/or lesser than the set point. If the average cargo temperature varies from the set point, or is outside of the threshold band, the controller 46 takes action by changing the operation of the refrigeration unit 14, in step 60. These changes may include switching the compressor 16 on if the average cargo temperature is higher than allowed by the threshold, or turning the compressor 16 off and/or introducing a greater amount of fresh airflow 32 if the average cargo temperature is lower than the threshold. This process is repeated continuously, as the plurality of cargo temperature sensors 50 constantly monitor the cargo temperature.
  • the refrigeration unit 14, and the cargo temperature sensors 50 monitor the cargo for localized variations in cargo temperature, referred to as "hot spots", where a portion of the cargo 12 is locally undesirably warmer than surrounding or adjacent cargo 12, or “cold spots”, where a portion of the cargo 12 is locally undesirably cooler than surrounding or adjacent cargo 12.
  • the controller 46 monitors the cargo temperature data received from the plurality of cargo temperature sensors 50, for individual cargo temperatures that vary from the set point or average cargo temperature outside of a local cargo temperature threshold, in step 62.
  • Such local variation is indicative of a hot spot or cold spot in the cargo 12, and may be addressed by the controller in step 64, by for example, switching the evaporator fan 24 to high speed operation to urge a stronger circulation of airflow 28 throughout the container 10, thereby eliminating the hot spot or cold spot.
  • the cargo temperature data from the cargo temperature sensors 50 is stored at the controller 46 and may be output as, for example, a cargo temperature history or temperature map 68 once the cargo 12 reaches a destination.
  • the cargo temperature map 68 is useful for a customer to cargo receiver in determining which portions of the cargo, if any, were at a higher or lower temperature, which may affect a remaining time of the cargo 12 portions prior to spoilage or other undesirable effects.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

L'invention concerne un procédé de surveillance et de régulation de la température d'une cargaison dans un conteneur de transport de cargaison réfrigéré comprenant la mesure d'une température d'une pluralité de parties de la cargaison se trouvant dans le conteneur de cargaison par le biais d'une pluralité de sondes de température orientées au niveau des parties de la cargaison. Une ou plusieurs températures mesurées de la cargaison sont comparées à un seuil présélectionné. Le fonctionnement d'une unité de réfrigération se trouvant au niveau du conteneur de cargaison en communication de fonctionnement avec la pluralité de sondes est changé en fonction d'un résultat de la comparaison. Un système de réfrigération du conteneur de transport de cargaison comprend une pluralité de sondes de température de cargaison configurées pour déterminer une température d'au moins des parties d'une cargaison. Une unité de réfrigération et un dispositif de régulation sont connectés à l'unité de réfrigération et aux sondes de température de la cargaison pour commander le fonctionnement de l'unité de réfrigération en fonction des données reçues en provenance des sondes de température de la cargaison.
EP13712629.8A 2012-05-14 2013-03-12 Surveillance et régulation de la température d'une cargaison pour un conteneur réfrigéré Active EP2850372B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261646526P 2012-05-14 2012-05-14
PCT/US2013/030420 WO2013172936A1 (fr) 2012-05-14 2013-03-12 Surveillance et régulation de la température d'une cargaison pour un conteneur réfrigéré

Publications (2)

Publication Number Publication Date
EP2850372A1 true EP2850372A1 (fr) 2015-03-25
EP2850372B1 EP2850372B1 (fr) 2019-05-01

Family

ID=47998524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13712629.8A Active EP2850372B1 (fr) 2012-05-14 2013-03-12 Surveillance et régulation de la température d'une cargaison pour un conteneur réfrigéré

Country Status (6)

Country Link
US (1) US20150135737A1 (fr)
EP (1) EP2850372B1 (fr)
CN (1) CN104583694B (fr)
DK (1) DK2850372T3 (fr)
SG (1) SG11201407532RA (fr)
WO (1) WO2013172936A1 (fr)

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Also Published As

Publication number Publication date
WO2013172936A1 (fr) 2013-11-21
CN104583694A (zh) 2015-04-29
CN104583694B (zh) 2017-03-01
EP2850372B1 (fr) 2019-05-01
DK2850372T3 (da) 2019-07-22
SG11201407532RA (en) 2014-12-30
US20150135737A1 (en) 2015-05-21

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