US20070261424A1 - Cooling device and controlling method thereof for reefer container - Google Patents

Cooling device and controlling method thereof for reefer container Download PDF

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Publication number
US20070261424A1
US20070261424A1 US11/800,021 US80002107A US2007261424A1 US 20070261424 A1 US20070261424 A1 US 20070261424A1 US 80002107 A US80002107 A US 80002107A US 2007261424 A1 US2007261424 A1 US 2007261424A1
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US
United States
Prior art keywords
pressure
relay
container
controlling
controlling device
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.)
Abandoned
Application number
US11/800,021
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English (en)
Inventor
Shiliang Wang
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.)
China International Marine Containers Group Co Ltd
Shanghai CIMC Reefer Containers Co Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to CHINA INTERNATIONAL MARINE CONTAINERS (GROUP) LTD., SHANGHAI CIMC REEFER CONTAINERS CO., LTD. reassignment CHINA INTERNATIONAL MARINE CONTAINERS (GROUP) LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WANG, SHILIANG
Publication of US20070261424A1 publication Critical patent/US20070261424A1/en
Abandoned legal-status Critical Current

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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
    • F25D29/003—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
    • 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
    • F25D17/047—Pressure equalising devices
    • 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

Definitions

  • the invention relates to a cooling device and a controlling method thereof for a reefer container, more specifically, relates to a controlling circuit and a controlling method of the cooling device.
  • FIG. 1 A controlling circuit diagram of a conventional cooling device for a reefer container is shown in FIG. 1 .
  • a compressor relay 1 When the reefer container or carriage is operated in a cooling mode, a compressor relay 1 , a condenser fan relay 2 and an evaporator fan relay 3 of its cooling device are all in an ON state, and the compressor, the condenser fan and the evaporator fan are all in the condition of operation.
  • the operating states of the compressor relay 1 , the condenser fan relay 2 and the evaporator fan relay 3 are controlled by a controller 4 .
  • the conventional cooling device can not detect and control the air pressure inside the container, and thus can not prevent the container body from being crushed due to an excessive negative pressure inside the container.
  • the first object of the invention is to provide a cooling device for a reefer container to detect the air pressure inside the container and stop operating if the air pressure inside the container is too low so as to prevent the container body from being crushed due to an excessive negative pressure inside the container.
  • the second object of the invention is to provide a method of controlling a cooling device for a reefer container, which allows detecting and controlling of the air pressure inside the container, so as to prevent the container body from being crushed due to an excessive negative pressure inside the container.
  • the invention provides a cooling device with a controlling circuit for a reefer container, the controlling circuit comprising a compressor relay, a condenser fan relay and an evaporator fan relay which are connected in parallel, as well as a controller for controlling operating states of the compressor relay, the condenser fan relay and the evaporator fan relay.
  • the controlling circuit further comprises a pressure switch which is connected to the compressor relay in series and a pressure sensing and controlling device which can control the pressure switch to turn on or off. When the air pressure inside the container drops to a preset pressure, the pressure sensing and controlling device controls the pressure switch to turn off; and when the air pressure inside the container rises higher than the preset pressure, the pressure sensing and controlling device controls the pressure switch to turn on.
  • the pressure switch and the compressor relay connected in series are connected to the condenser fan relay and the evaporator fan relay in parallel.
  • the pressure switch and the compressor relay connected in series are connected to the evaporator fan relay in parallel, and the condenser fan relay is connected to the compressor relay in parallel.
  • the compressor relay, the condenser fan relay and the evaporator fan relay connected in parallel are connected to the pressure switch in series.
  • the controlling circuit further comprises a time delay relay which is controlled by the pressure sensing and controlling device and can delay the pressure switch to turn on, the time delay relay being connected in parallel to the pressure switch and the compressor relay connected in series.
  • the pressure sensing and controlling device controls a contact of the time delay relay to disconnect; and when the air pressure inside the container rises higher than the preset pressure, the pressure sensing and controlling device controls the contact of the time delay relay to connect, and the time delay relay delays the pressure switch to turn on.
  • the pressure sensing and controlling device is a vacuum pressure switch, and the vacuum pressure switch is disposed inside the container.
  • the pressure sensing and controlling device comprises a controlling device and a pressure sensor which is disposed inside the container.
  • the controlling device can acquire information of the air pressure inside the container from the pressure sensor and transmit control signals.
  • the invention provides a method of controlling a cooling device with a controlling device for a reefer container, the controlling circuit comprising a compressor relay, a condenser fan relay and an evaporator fan relay which are connected in parallel, as well as a controller for controlling operating states of the compressor relay, the condenser fan relay and the evaporator fan relay.
  • the controlling circuit further comprises a pressure switch which is connected to the compressor relay in series and a pressure sensing and controlling device which can control the pressure switch to turn on or off.
  • the controlling circuit further comprises a time delay relay which is controlled by the pressure sensing and controlling device and can delay the pressure switch to turn on, and which is connected in parallel to the pressure switch and the compressor relay connected in series.
  • a contact of the time delay relay is controlled to disconnect by the pressure sensing and controlling device, and when the air pressure inside the container rises higher than the preset pressure, the contact of the time delay relay is controlled to connect by the pressure sensing and controlling device, and the pressure switch is delayed to turn on by the time delay relay.
  • the pressure sensing and controlling device comprises a controlling device and a pressure sensor which is disposed inside the container.
  • the air pressure inside the container is detected by the pressure sensor, and the controlling device acquires information of the air pressure inside the container from the pressure sensor and transmits control signals.
  • the invention can be implemented in a simple structure and at a low cost, since only a few of electric elements are added to the conventional controlling circuit for controlling the air pressure inside the container.
  • FIG. 1 is a diagram schematically showing a controlling circuit of a conventional cooling device for a reefer container or a refrigerated lorry.
  • FIG. 2 is a diagram schematically showing a controlling circuit of a cooling device for a reefer container according to a first embodiment of the invention.
  • FIG. 3 is a diagram schematically showing a controlling circuit of a cooling device for a reefer container according to a second embodiment of the invention.
  • FIG. 4 is a diagram schematically showing a controlling circuit of a cooling device for a reefer container according to a third embodiment of the invention.
  • cooling device and the controlling method thereof for a reefer container according to the invention are described referring to FIGS. 2 to 4 .
  • the cooling device and the controlling method thereof can be applied to refrigerated lorry, but here only the description for the reefer container is given below by way of example.
  • the controlling circuit of the cooling device for the reefer container according to the first embodiment of the invention is shown in FIG. 2 .
  • the controlling circuit of the cooling device comprises a compressor relay 1 , a condenser fan relay 2 , an evaporator fan relay 3 , a controller 4 , a vacuum pressure switch 5 and a pressure switch 7 .
  • the controller 4 can control operating states of the compressor relay 1 , the condenser fan relay 2 and the evaporator fan relay 3 .
  • the vacuum pressure switch 5 is disposed inside the container for controlling the pressure switch 7 to turn on or off according to the air pressure inside the container. In this embodiment, the pressure switch 7 and the compressor relay 1 connected in series, are then connected to the condenser fan relay 2 and the evaporator fan relay 3 in parallel.
  • An action value for the vacuum pressure switch 5 is preset according to the air pressure inside the container to be controlled (this value will be referred as preset pressure below).
  • the vacuum pressure switch 5 controls the pressure switch 7 to turn off.
  • the compressor relay 1 is disconnected, and the compressor is caused to stop operating.
  • the vacuum pressure switch 5 controls the pressure switch 7 to turn on.
  • the controller 4 controls the compressor relay 1 to turn on, and the compressor begins operation. Thereby it is ensured that the air pressure inside the container is not lower than the preset pressure so as to ensure safety of the container body.
  • the controlling circuit of the cooling device may be provided with a time delay relay 6 therein.
  • the time delay relay 6 is controlled by the vacuum pressure switch 5 , and can delay the pressure switch 7 to turn on.
  • the time delay relay 6 is connected in parallel to the pressure switch 7 and the compressor relay 1 connected in series.
  • the vacuum pressure switch 5 controls a contact of the time delay relay 6 to disconnect.
  • the vacuum pressure switch 5 controls the contact of the time delay relay 6 to connect so that the time delay relay 6 is energized, and the time delay relay 6 delays the pressure switch 7 to turn on, that is, makes the pressure switch 7 turn on after a period of time has elapsed. Therefore, the cooling system will stop operating for a period of time after the air pressure inside the container drops to the preset pressure. Thereby such a risk is prevented that the container body is damaged due to the temperature inside the container dropping and the air pressure inside the container rapidly dropping in the case that the cooling system continuously operates.
  • the pressure switch can be replaced by another contact of the time delay relay.
  • the vacuum pressure switch 5 can be replaced by a common pressure sensor in combination with a controlling device.
  • the pressure sensor detects the air pressure inside the container and transmits information of the air pressure inside the container to the controlling device.
  • the controlling device sends control signals respectively to the pressure switch 7 and the time delay relay 6 for controlling them.
  • the second embodiment is almost the same as the first embodiment except that: the pressure switch 7 and the compressor relay 1 connected in series are connected to the evaporator fan relay 3 in parallel, and the condenser fan relay 2 is connected to the compressor relay 1 in parallel.
  • the vacuum pressure switch 5 controls the pressure switch 7 to turn off. At this time, the compressor relay 1 and condenser fan relay 2 are disconnected, and the compressor and the condenser fan are caused to stop operating.
  • the vacuum pressure switch 5 controls the pressure switch 7 to turn on. At this time, the controller 4 controls the compressor relay 1 and the condenser fan relay 2 to turn on, and the compressor and the condenser fan begin operation. Thereby it is ensured that the air pressure inside the container is not lower than the preset pressure, so as to ensure safety of the container body.
  • the third embodiment is almost the same as the first embodiment except that: the compressor relay 1 , the condenser fan relay 2 and the evaporator fan relay 3 connected in parallel, are then connected to the pressure switch 7 in series.
  • the vacuum pressure switch 5 controls the pressure switch 7 to turn off.
  • the compressor relay 1 , the condenser fan relay 2 and the evaporator fan relay 3 are disconnected, and the compressor, the condenser fan and the evaporator fan are caused to stop operating.
  • the vacuum pressure switch 5 controls the pressure switch 7 to turn on.
  • the controller 4 controls the compressor relay 1 , the condenser fan relay 2 and the evaporator fan relay 3 to turn on, and the compressor, the condenser fan and the evaporator fan begin operation. Thereby it is ensured that the air pressure inside the container is not lower than the preset pressure, so as to ensure safety of the container body.
  • the controlling circuit of the cooling device comprises a compressor relay, a condenser fan relay and an evaporator fan relay connected in parallel as well as a controller for controlling operating states of the compressor relay, the condenser fan relay and the evaporator fan relay.
  • the controlling circuit further comprises a pressure switch which is connected to the compressor relay in series and a pressure sensing and controlling device which can control the pressure switch to turn on or off.
  • the controlling method comprises the following steps: measuring the air pressure inside the container by the pressure sensing and controlling device; when the air pressure inside the container drops to the preset pressure, controlling the pressure switch to turn off by the pressure sensing and controlling device, when the air pressure inside the container rises higher than the preset pressure, controlling the pressure switch to turn on by the pressure sensing and controlling device.
  • the air pressure inside the container can be ensured to be not lower than the preset pressure value, and so to ensure safety of the container body.
  • the controlling circuit may be provided with the time delay relay 6 which is controlled by the pressure sensing and controlling device and can delay the pressure switch 7 to turn on.
  • the time delay relay 6 is connected in parallel to the pressure switch 7 and the compressor relay 1 connected in series.
  • the pressure sensing and controlling device controls a contact of the time delay relay to disconnect; and when the air pressure inside the container rises higher than the preset pressure, the pressure sensing and controlling device controls the contact of the time delay relay to connect, and the time delay relay 6 delays the pressure switch 7 to turn on.
  • the cooling system will stop operating for a period of time after the air pressure inside the container drops to the preset pressure. Thereby such a risk is prevented that the container is damaged due to the temperature inside the container dropping and the air pressure rapidly dropping in the case that the cooling system continuously operates.
  • the pressure sensing and controlling device comprises a controlling device and a pressure sensor which is disposed inside the container.
  • the air pressure inside the container is detected by the pressure sensor, and the controlling device acquires information of the air pressure inside the container from the pressure sensor and transmits control signals.
  • the pressure sensing and controlling device can be a vacuum pressure switch.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
US11/800,021 2006-05-15 2007-05-03 Cooling device and controlling method thereof for reefer container Abandoned US20070261424A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNA2006100606712A CN101074828A (zh) 2006-05-15 2006-05-15 一种冷藏集装箱用制冷装置和控制方法
CN200610060671.2 2006-05-15

Publications (1)

Publication Number Publication Date
US20070261424A1 true US20070261424A1 (en) 2007-11-15

Family

ID=38229986

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/800,021 Abandoned US20070261424A1 (en) 2006-05-15 2007-05-03 Cooling device and controlling method thereof for reefer container

Country Status (5)

Country Link
US (1) US20070261424A1 (de)
EP (1) EP1857758A3 (de)
CN (1) CN101074828A (de)
AU (1) AU2007201978A1 (de)
BR (1) BRPI0701090A2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170055694A (ko) 2015-11-12 2017-05-22 대우조선해양 주식회사 카고홀드의 팬구동 에너지 절감장치
US10254027B2 (en) 2014-05-02 2019-04-09 Thermo King Corporation Method and system for controlling operation of evaporator fans in a transport refrigeration system
US10837694B2 (en) 2016-12-13 2020-11-17 Whirlpool Corporation Refrigeration appliance fan
US11828518B2 (en) 2016-12-13 2023-11-28 Whirlpool Corporation Refrigeration appliance fan

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK177395B1 (en) 2011-11-02 2013-03-18 Maersk Container Ind As A method for operating a refrigeration system for a cargo container
CN104567182A (zh) * 2014-12-24 2015-04-29 李勋田 一种移动式无动力节能食品保鲜箱及保鲜方法
EP3258192B1 (de) * 2015-02-27 2021-11-10 Daikin Industries, Ltd. Kühlvorrichtung für container
WO2017108101A1 (en) * 2015-12-22 2017-06-29 Carrier Corporation Refrigerated sales furniture
CN108569477A (zh) * 2018-03-20 2018-09-25 徐州迈斯特机械科技有限公司 一种机械制造电力器件存放防护系统
US10861799B1 (en) 2019-05-17 2020-12-08 Taiwan Semiconductor Manufacturing Company, Ltd. Dummy die placement without backside chipping

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3377816A (en) * 1966-08-01 1968-04-16 Carrier Corp Compressor control arrangement
US3563048A (en) * 1968-12-30 1971-02-16 Carrier Corp Automatic control for an air conditioning system
US3965692A (en) * 1974-11-15 1976-06-29 Friedrich Refrigerators Inc. Refrigeration control circuit
US4355523A (en) * 1979-12-18 1982-10-26 Nissan Motor Company, Ltd. Automatic car-cooler clutch control apparatus
US4663725A (en) * 1985-02-15 1987-05-05 Thermo King Corporation Microprocessor based control system and method providing better performance and better operation of a shipping container refrigeration system
US4899549A (en) * 1989-01-31 1990-02-13 Thermo King Corporation Transport refrigeration system with improved temperature and humidity control
US4998582A (en) * 1989-03-06 1991-03-12 Mitsubishi Jukogyo Kabushiki Kaisha Refrigerator system for a container
US5239834A (en) * 1992-07-13 1993-08-31 Travers Richard H Auxiliary outside air refrigeration system

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
GB2098362A (en) * 1981-03-17 1982-11-17 Sea Containers Ltd Cargo refrigeration

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3377816A (en) * 1966-08-01 1968-04-16 Carrier Corp Compressor control arrangement
US3563048A (en) * 1968-12-30 1971-02-16 Carrier Corp Automatic control for an air conditioning system
US3965692A (en) * 1974-11-15 1976-06-29 Friedrich Refrigerators Inc. Refrigeration control circuit
US4355523A (en) * 1979-12-18 1982-10-26 Nissan Motor Company, Ltd. Automatic car-cooler clutch control apparatus
US4663725A (en) * 1985-02-15 1987-05-05 Thermo King Corporation Microprocessor based control system and method providing better performance and better operation of a shipping container refrigeration system
US4899549A (en) * 1989-01-31 1990-02-13 Thermo King Corporation Transport refrigeration system with improved temperature and humidity control
US4998582A (en) * 1989-03-06 1991-03-12 Mitsubishi Jukogyo Kabushiki Kaisha Refrigerator system for a container
US5239834A (en) * 1992-07-13 1993-08-31 Travers Richard H Auxiliary outside air refrigeration system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10254027B2 (en) 2014-05-02 2019-04-09 Thermo King Corporation Method and system for controlling operation of evaporator fans in a transport refrigeration system
KR20170055694A (ko) 2015-11-12 2017-05-22 대우조선해양 주식회사 카고홀드의 팬구동 에너지 절감장치
US10837694B2 (en) 2016-12-13 2020-11-17 Whirlpool Corporation Refrigeration appliance fan
US11828518B2 (en) 2016-12-13 2023-11-28 Whirlpool Corporation Refrigeration appliance fan

Also Published As

Publication number Publication date
EP1857758A2 (de) 2007-11-21
AU2007201978A1 (en) 2007-11-29
EP1857758A3 (de) 2007-12-26
BRPI0701090A2 (pt) 2008-12-30
CN101074828A (zh) 2007-11-21

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SHANGHAI CIMC REEFER CONTAINERS CO., LTD., CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WANG, SHILIANG;REEL/FRAME:019555/0711

Effective date: 20070518

Owner name: CHINA INTERNATIONAL MARINE CONTAINERS (GROUP) LTD.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WANG, SHILIANG;REEL/FRAME:019555/0711

Effective date: 20070518

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION