WO2003021163A1 - Systeme et procede de commande de la puissance de refroidissement pour du fret - Google Patents

Systeme et procede de commande de la puissance de refroidissement pour du fret Download PDF

Info

Publication number
WO2003021163A1
WO2003021163A1 PCT/US2002/028330 US0228330W WO03021163A1 WO 2003021163 A1 WO2003021163 A1 WO 2003021163A1 US 0228330 W US0228330 W US 0228330W WO 03021163 A1 WO03021163 A1 WO 03021163A1
Authority
WO
WIPO (PCT)
Prior art keywords
switch
unit
remote
maintenance
reefer
Prior art date
Application number
PCT/US2002/028330
Other languages
English (en)
Inventor
Timothy Slifkin
Herbert Perten
Robert Schieke
Richard F. Bladek
Original Assignee
Startrak_L.L.C.
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 Startrak_L.L.C. filed Critical Startrak_L.L.C.
Priority to MXPA04002132A priority Critical patent/MXPA04002132A/es
Priority to AU2002335708A priority patent/AU2002335708B2/en
Publication of WO2003021163A1 publication Critical patent/WO2003021163A1/fr

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
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D27/00—Heating, cooling, ventilating, or air-conditioning
    • B61D27/0072—Means for cooling only
    • B61D27/0081—Means for cooling only of wagons for transporting refrigerated goods

Definitions

  • This invention relates to remote monitoring and control of mobile refrigeration units, and particularly for railroad cars, although the invention is applicable to refrigeration trucks and other mobile units.
  • Microprocessors on mobile refrigeration units include a local power switch which, when turned off, comjDletely disables a so-called reefer (mobile refrigeration) unit. This allows a man on a ground (i.e. on site) to power a unit off when not in service, or when working on a unit. However, this requires the presence of a person at or near the refrigeration unit.
  • An object of this invention is to provide additional remote control authority for mobile refrigeration and remote capability to turn on/off a mobile refrigeration unit.
  • a system provides a secondary control switch, or a 'remote switch', which is part of a Reefer Trip Remote Control unit, and is operated via a wireless link. This capability permits a reefer unit to be tjrned on and off remotely via wireless technology.
  • Fig. 1 is a block diagram of a system embodying the invention.
  • Fig. 2 is a block diagram of a reefer control arrangement embodying the invention.
  • Fig. 3 is a block diagram of a control unit in Fig. 2
  • Fig. 4 is a block diagram of another reefer control arrangement embodying the invention.
  • Fig. 1 illustrates a system for controlling a so-called (reefer unit) i.e. mobile refrigeration unit RE1 on a railroad car RC1.
  • the car RC1 is a motor truck or other mobile device carrying the refrigeration unit RE1.
  • the refrigeration unit RE1 contains a local power switch which, when turned off, completely disables mobile refrigeration unit RE1 , and when turned on permits operation of the unit.
  • a control unit CU1 on the car RC1 monitors and controls the temperature and operation of the refrigeration unit RE1.
  • An antenna AN1 connected to the control nit CU1 puts the control unit CU1 into communication with a remote station RST1 via a bidirectional wireless link WL1.
  • the wireless link is a station-to-s1ation link.
  • the wireless link WL1 is to another station and then via other wireless;, links or land lines, the Internet, or a combination of these, to the remote station RST1.
  • the wireless link WL1 constitutes one or more satellites, alone or in combination with other links. In effect the wireless link WL1 represents a communication system generally.
  • the remote station RS11 can remotely control the power to the refrigeration unit RE1 via the wireless link WL1 , the antenna AN1 , and the control unit CU1.
  • the control unit CU1 and the trip module TM1 coact to allow a local maintenance person at the car RC1 to take ultimate authority to turn off the refrigeration unit RE1.
  • Figs. 2 and 3 disclose an embodiment of the invention that include a secondary control switch, or a 'Remote Switch', which is part of the trip module TM1 embodying the invention, and is operated through the control unit CU1 via the wireless link WL1. As shown in
  • a local switch LS1 within the reefer unit RE1 remains normally closed after a workman or site operator on the car has closed it. Current then flows from the battery BA1 through a normally closed latching kill relay KR1 to the unit RE1.
  • a site operator would turn the switch LS1 OFF prior to unloading the car; and turn it ON prior to loading the car.
  • the trip module TM provides an alternative path for power to the reefer unit RE1 , through the remote switch RS1.
  • This switch RS1 is controlled with the remote wireless link WL1 , and can provide power to the reefer unit RE1 regardless of the state of the local switch LS1.
  • a latch RSL1 that responds to a signal on a remote switch enable line RM1 applies a positive or high signal to the control section of a remote switch RS1. This high signal closes the remote switch RS1.
  • the cathode of diode D1 connects control section of a remote switch RS1 to ground through the switch MS1 of the maintenance switch MSW. This forces the control section of remote switch RS1 to go low regardless ol the command from CU1.
  • the cathode of diode D1 is un-terminated, and control of the remote switch RS1 receives its latched high enable signal from the latch RSL1 in the control unit CU1.
  • the latching kill relay KR1 responds to two inputs identified as 2 (ON) and 4 (OFF). Normally, low or zero voltages appear at both inputs. A high or positive potential at input 4 latches the kill relay KR1 in the open position. A positive reset potential at the input 4 releases the latch and allows the relay to close.
  • a sito operator or any other person can push a clearly visible button on a momentary contact kill switch EK1. Operation of this button places a positive potential on input
  • the kill switch EK1 connects to a positive potential, which shows up on a kill switch monitor line KM I and at a kill switch monitor in the control unit CU1.
  • Fig. 3 illustrates details of the control unit CUl
  • a controller C01 in the control unit CU1 then automatically sends a message over the wireless link WL1 to alert remote maintenance personnel or technicians of the activation of kill switch EK1.
  • a trained technician on site uses a hidden reset button on a hidden reset switch HK1. This produces a positive potential at the input
  • switch MSW is in its MAINTENANCE position, the diode D2 ties the terminal 2 of the control section of switch KR1 , thereby preventing any high signal from getting to the control of switch KR1 , and keeping it open. Thus, power cannot be applied to the reefer unit RE1 inadvertently during maintenance.
  • the second pole MS2 of maintenance switch MSW enables and disables remote control of the reefer unit RE1.
  • the pole MS2 With the maintenance switch MSW in its REMOTE position, the pole MS2 connects serial control line TX to transceiver TR1 , thereby allowing for remote control of reefer unit RE1. In the MAINTENANCE position, this connection is broken, and inhibits any remote control ol RE1.
  • a second connection through the second pole MS2 of maintenance switch MSW connects the line TX to line RX of the control unit CU1. This provides CU1 with an indication that the switch is in its MAINTENANCE position.
  • Control of Remote Switch RS1 by the control unit CU1 transpires through latch RSL1 shown in Fig. 3.
  • the latch RSL1 remembers its condition if the controller C01 reboots. In the event of an inadvertent reset, or reboot, of the controller C01 in control unit
  • latch RSL1 stays in the state it had before the reset. If its state was high before the interruption, latch relay RSL1 closes the switch RS1 and provides continuous power to reofer unit RE1. If its state was low before the interruption, latch relay RSI.1 closes the switch RS1 and keeps reefer unit RE1 off.
  • the transceiver TR1 forms part of the reefer unit RE1 and senses the conditions of operation in the operation unit OP1 within the reefer unit.
  • a microcontroller MC01 in the reefer unit RE1 senses conditions, such as temperature, in the operation unit 0P1 and other parts of the reefer unit.
  • the transceiver TR1 transmits the conditions sensed to the controller C01 in the control unit CU1.
  • the controller CO1 then transmits these sensed conditions to the remote station RST1 via a transceiver TR2 and the antenna AN1.
  • the controller C01 also forms the kill switch monitor that monitors the condition of the kill switch EK1 via the kill switch monitor line KM1. It transmits this condition to the remote station RST1 via the transceiver TR2 and the antenna AN1.
  • the controller C01 also forms the remote kill reset that resets the latching kill relay KR1 via the remote kill reset line RK1. It receives a command to reset from a technician at the remote station
  • the controller CO1 also forms the remote switch enable that sets the latch RSL1 and latches the remote switch RS1 via the remote switch enable line RM1 in response to the remote station RST1 via the transceiver TR2 and antenna AN1.
  • the transceiver TR2 in the control unit CU1 transmits all signals to and from the controller C01 from and to the antenna AN1.
  • the invention permits a reefer unit RE1 to be turned on and off remotely via wireless technology.
  • the switching arrangement involving unit CU1 and trip module TM1 works so a remote operator can start the system in th event that a local technician has inadvertently left the 'Local Switch' in the 'OFF' position on the front panel.
  • the control unit CU1 operates so the remote operator can place the unit in service and take it out of service.
  • the remote operator can access the unit when, no ground personnel are there to gain utilization advantages.
  • the remote operator can shut the unit RE1 down if the local switch in trip m dule TM1 was left on.
  • the circuitry is set to allow a technician working on the unit to guarantee that the unit will not be turned on via a remote command.
  • An embodiment includes a wireless link failure bypass should the remote system fail.
  • a local service technician is able to bypass it so that the load can be saved and the shipment sent on its way.
  • the reefer trip emote control unit does not operate.
  • the remote station can send commands and elicit responses from a microprocessor, but cannot control power to it.
  • the current 'Local Switch' on the front panel is the only control. If it is on, the micro is on. If it is off, the micro is off. This topology provides for minimum-impact monitoring and control of the load over the wireless link.
  • the local man-on-the-ground has fin al authority.
  • a bypass relay 'Remote Switch' appears in parallel to the 'Local Switch'. This allows the remote link to turn on the microprocessor even if the main power switch is off.
  • a local 'Kill Switch' (electrically in series with the relay and main power switch) is mounted :>n the front panel. This is a momentary button that drives a latching relay. Once pressed, the relay latches in the OFF position, and the microprocessor unit becomes disabled (by removing power to the unit). The latching relay is then turned ON via a command over the remote link (with potentially yet an additional third- (3 rd ) level of password security).
  • any activation of the 'Kill Switch' causes an alarm to be sent to the Central Data Server. This discourages the use of the 'Kill Switch' to shut the unit down unless there is an emergency.
  • the wireless link system is down, there is a hidden switch lhat will reset the Kill relay.
  • the Kill relay is disabled over the wireless link. This allows the reefer unit to be shut down remotely in the event that the 'Local Switch' was left on.
  • a 'Maintenance Switch' is mounted in a concealed area in the engine compartment. This switch allows a reliable local shut down of the entire unit by disabling the trip moduleTMI . It disables the 'Remote Switch' and disables the resetting of the 'Kill Switch'. It also disables the communication between the trip module TM1 unit and the reefer unit.
  • the invention assures that local maintenance people/ technicians can safely work on the units (i.e. 'Maintenance Switch', 'Kill
  • the invention provides a way of shutting the system off for maintenance purposes. Should the wireless link system fail, a local operator is able to operate the equipment.
  • the wireless technology of the embodiments permits utilization benefits, for example, the unit can be turned on and pre-tripped remotely in advance of picking up a load (reducing the need for local labor). It has the advantage of bypassing the 'Local Switch' should the local operator inadvertently leave it off. This thus furnishes a remote start-up/ shutdown of the unit. From a freight monitoring and damage-prevention perspective, it permits turning the unit back on if it is inadvertently left off by a service tech after completing his work. This means thai, there is a way of bypassing the 'Local Switch' via a command over the wireless link.
  • the 'Maintenance Switch' and a 'Kill Switch also serve safety purposes.
  • the 'Maintenance Switch' completely disables the remote control system.
  • the service technician/ local man-on-the-ground has the final authority during servicing or preventive maintenance schedules by using this 'Maintenance Switch' located in a concealed location in the engine compartment.
  • the 'Kill Switch' will immediately shut down the reefer unit no matter if the Local Switch' or the 'Remote Switch' or both are enabled.
  • the 'Kill Switch' is a red pushbutton and is in a highly visible location,
  • the voltage polarities for actuating and de-actuating elements are examples only and according to an embodiment of the invention are replaced with opposite polarities or different levels. Moreover according to an embodiment of the invention the relays are replaced with semiconductor or other devices having the capabilities of handling the currents used.
  • the remote station includes computers. Control of the remote station RST1 rests in the hands of technicians who respond to signals from the antenna AN1. According to an embodiment of the invention, some of the responses in the remote station RST1 occur automatically.
  • the computers in the remote station RST1 also automatically record all events indicated by signals arriving at the remote station.
  • FIG. 4 Another embodiment of the invention appears in Fig. 4, wherein like reference characters represent like parts.
  • operation of the reefer unit RE1 with the trip module TM1 requires local closing of three ganged switches MS1 , MS2, and MS3 of ⁇ i maintenance switch MSW.
  • the switch MS2 When in the normally closed position, the switch MS2 provides a path for a signal from the wireless link WL1 appearing on the remote switch enable line RM1 to reach the remote switch RS1.
  • operation of reset the Pitching kill relay KR1 requires that three ganged switches MS1, MS2, and MS3 of the maintenance switch MSW assume the closed position in Fig. 4.

Abstract

Cette invention concerne une unité de réfrigération mobile (RE1) qui est enclenchée et coupée à distance via une technique sans fil faisant intervenir un système avec un commutateur de commande secondaire (CU1), ou bien un 'commutateur à distance' faisant partie d'une unité de télécommande de réfrigération (TM1) via un liaison de communication sans fil ou combinée (WL1).
PCT/US2002/028330 2001-09-04 2002-09-04 Systeme et procede de commande de la puissance de refroidissement pour du fret WO2003021163A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
MXPA04002132A MXPA04002132A (es) 2001-09-04 2002-09-04 Sistema y metodo para controlar el encendido de refrigeracion de transportes.
AU2002335708A AU2002335708B2 (en) 2001-09-04 2002-09-04 System and method for freight refrigeration power control

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US31705801P 2001-09-04 2001-09-04
US31705601P 2001-09-04 2001-09-04
US60/317,056 2001-09-04
US60/317,058 2001-09-04
US32738201P 2001-10-04 2001-10-04
US60/327,382 2001-10-04

Publications (1)

Publication Number Publication Date
WO2003021163A1 true WO2003021163A1 (fr) 2003-03-13

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Application Number Title Priority Date Filing Date
PCT/US2002/028330 WO2003021163A1 (fr) 2001-09-04 2002-09-04 Systeme et procede de commande de la puissance de refroidissement pour du fret

Country Status (2)

Country Link
CN (1) CN100420905C (fr)
WO (1) WO2003021163A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2597405A1 (fr) * 2011-11-25 2013-05-29 Thermo King Container-Denmark A/S Procédé automatisé pour l'inspection avant déclenchement d'un récipient avec un système de contrôle de la climatisation
WO2014200990A1 (fr) * 2013-06-10 2014-12-18 Thermo King Corporation Schéma de communication à point unique pour un système de réfrigération de transport
US9310279B2 (en) 2012-12-07 2016-04-12 Thermo King Corporation System for tracking and testing generator sets used in conjunction with temperature controlled containers
US10596878B2 (en) 2018-03-30 2020-03-24 Thermo King Corporation Systems and methods for management of eTRU
US10723202B2 (en) 2018-03-30 2020-07-28 Thermo King Corporation Systems and methods for coordinated control of multiple transport refrigeration systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105783410B (zh) * 2016-03-28 2018-05-29 青岛海尔电冰箱有限公司 冰箱的控制方法与冰箱

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5104037A (en) * 1990-10-26 1992-04-14 Aeg Westinghouse Transportation Systems, Inc. Microprocessor controlled climate control device for a plurality of mass transit vehicles
US5279458A (en) * 1991-08-12 1994-01-18 Carrier Corporation Network management control

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5104037A (en) * 1990-10-26 1992-04-14 Aeg Westinghouse Transportation Systems, Inc. Microprocessor controlled climate control device for a plurality of mass transit vehicles
US5279458A (en) * 1991-08-12 1994-01-18 Carrier Corporation Network management control

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2597405A1 (fr) * 2011-11-25 2013-05-29 Thermo King Container-Denmark A/S Procédé automatisé pour l'inspection avant déclenchement d'un récipient avec un système de contrôle de la climatisation
US9097456B2 (en) 2011-11-25 2015-08-04 Thermo King Corporation Method for in-service testing a climate control system for a container
EP2782851A4 (fr) * 2011-11-25 2015-11-25 Thermo King Corp Procédé d'essai en service d'un système de conditionnement d'air pour un conteneur
US9971366B2 (en) 2011-11-25 2018-05-15 Thermo King Corporation Method for in-service testing a climate control system for a container
US9310279B2 (en) 2012-12-07 2016-04-12 Thermo King Corporation System for tracking and testing generator sets used in conjunction with temperature controlled containers
US9539879B2 (en) 2012-12-07 2017-01-10 Thermo King Corporation System for tracking and testing generator sets used in conjunction with temperature controlled containers
WO2014200990A1 (fr) * 2013-06-10 2014-12-18 Thermo King Corporation Schéma de communication à point unique pour un système de réfrigération de transport
US9649911B2 (en) 2013-06-10 2017-05-16 Thermo King Corporation Single point communication scheme for a transport refrigeration system
US10596878B2 (en) 2018-03-30 2020-03-24 Thermo King Corporation Systems and methods for management of eTRU
US10723202B2 (en) 2018-03-30 2020-07-28 Thermo King Corporation Systems and methods for coordinated control of multiple transport refrigeration systems

Also Published As

Publication number Publication date
CN100420905C (zh) 2008-09-24
CN1585878A (zh) 2005-02-23

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