IE852167L - Automatic emergency engine starting system for a¹refrigeration unit - Google Patents
Automatic emergency engine starting system for a¹refrigeration unitInfo
- Publication number
- IE852167L IE852167L IE852167A IE216785A IE852167L IE 852167 L IE852167 L IE 852167L IE 852167 A IE852167 A IE 852167A IE 216785 A IE216785 A IE 216785A IE 852167 L IE852167 L IE 852167L
- Authority
- IE
- Ireland
- Prior art keywords
- prime mover
- source
- temperature
- electrical power
- load
- Prior art date
Links
- 238000005057 refrigeration Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract description 11
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 230000009977 dual effect Effects 0.000 abstract description 3
- 230000001351 cycling effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 101100229711 Caenorhabditis elegans eas-1 gene Proteins 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- IJJWOSAXNHWBPR-HUBLWGQQSA-N 5-[(3as,4s,6ar)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]-n-(6-hydrazinyl-6-oxohexyl)pentanamide Chemical compound N1C(=O)N[C@@H]2[C@H](CCCCC(=O)NCCCCCC(=O)NN)SC[C@@H]21 IJJWOSAXNHWBPR-HUBLWGQQSA-N 0.000 description 1
- 101100501304 Caenorhabditis elegans emr-1 gene Proteins 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/066—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems characterised by the use of dynamo-electric machines
-
- 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
- F25B27/00—Machines, plants or systems, using particular sources of energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
A refrigeration unit having a dual drive is provided with an automatic switchover from line power to diesel in the event that electric power is interrupted and there is a heating/cooling demand. <IMAGE>
[GB2164433A]
Description
S I® •? $ 0 - 1 - In refrigeration, or reefer units, which are carrying a perishable load in a usually unattended, non-highway condition as at a truck terminal or the like, it is nou a standard practice to operate the truck diesel engine in a 5 fashion similar to that of a home refrigerator by automatically cycling the engine. Basically, rather than supplying continuous cooling, the engine is started when the load temperature reaches a first point and continues to ^ run until the load temperature is brought down to a second 10 point whereupon the engine is shut off. The engine is started by the automatic restart module (ARM). This cycling is fuel efficient in that the engine does not run longer than is necessary. Where line power is available, however, it is often more economical to operate the reefer 15 unit from line power in the described fashion of a home refrigerator, but this disables the diesel engine and the ARM. Upon interruption of the line power, the system is shut down and will not operate until there is a restoration of proper power. 20 According to the present invention there is provided in a refrigeration unit having a prime mover and adapted to be connected to a source of electrical power, an automatic emergency prime mover starting system comprising: 25 means for sensing the temperature of a load in said refrigeration unit; means for starting said prime mover responsive to the sensed temperature of the load reaching a first predetermined temperature and for keeping said prime mover 30 running until the sensed temperature of the load reaches a second predetermined temperature; means for connecting said refrigeration unit to said source of electrical power and for disabling said prime <0 & mover; means for monitoring said source of electrical power; and means for disconnecting said source of electrical power and for enabling said prime mover upon a sensed failure of said source of electrical power and a concurrent sensed load temperature reaching said first predetermined temperature whereupon said means for starting said prime mover is activated and said prime mover is run until said sensed temperature of the load reaches said second predetermined temperature.
A reefer unit with an ARM is provided with an automatic back-up system for powering the electric motor of the reefer unit in the event of a power outage. The system consists of a three-phase power monitor and an Automatic Engine Starting Controller. When a dual drive refrigeration unit is to be operated unattended, the electric motor acts as the prime mover in powering the refrigeration compressor. In the event of a power outage, the automatic emergency engine starting system senses the power loss. If while a power loss is sensed, the system requires cooling, the unit's control system is changed from electric motor drive to diesel engine drive and the ARM proceeds to start the engine. The diesel engine then acts as a back-up prime mover for powering the refrigeration compressor. If proper electric power is restored to the electric motor, the system would revert back to electric motor drive after cargo temperature requirements are satisfied. Where the ambient temperature is below the desired temperature, the system may provide a heating function to maintain the proper load temperature. - 3 - It is an object of this invention to provide an automatic switchover to a back-up prime mover upon the interruption o£ line power.
It is another object of this invention to provide a back-up system on truck/trailer units equipped with standby motors.
It is a further object of this invention to provide an automatic emergency engine starting system which reverts back to standby operation when proper three-phase power has been restored. These objects, and other as will become apparent hereinafter, are accomplished by the present invention.
The present invention also provides a method for automatically starting a disabled prime mover of a refrigeration unit upon the failure of a source of electrical power connected to said refrigeration unit comprising the steps of: connecting the refrigeration unit to said source of electrical power; disabling the prime mover; sensing the temperature of the load in the refrigeration unit; monitoring the source of electrical power; * upon the sensing of a failure of said source of electrical power, disconnecting the source of electrical power and enabling and starting the prime mover if the sensed load temperature has reached a first predetermined temperature.
Basically, the ARtfi cycles the diesel engine on and off to supply conditioned air, as required. When the unit is connected to an alternate power source/line power, the supply power is sensed and, upon the sensing of a power loss, in all, or any one leg, of the three-phase power leads, or upon the sensing of a low voltage condition, the ARM switches over the system to diesel power. If proper line power is restored, the unit is switched bach to line power once the current cooling, or heating, requirements are satisfied.
For & fuller understanding of the present invention, reference should now be made to the following detailed description thereof taken in conjunction with the accompanying drawings wherein: - 5 - Figure 1 is a schematic representation of a dual refrigeration unit employing the automatic back-up system of the present invention; and 5 Figures 2 A - 0 are a circuit diagram of the automatic engine starting controller with the unit in the "off" position. a In Figure 1, the numeral 10 designates the refrigeration compressor of a reefer unit. Compressor 10 is part of a 10 refrigeration system and is operatively connected to the unit diesel engine 12 via drive belt 11 and to electric motor 14 via drive belt 13 whereby compressor 10 can be driven by either engine 12 or motor 14. Belt 11 is connected to engine 12 via a centrifugal clutch (not illustrated) 15 which freewheels when motor 14 is powered by three-phase power source 16 which would ordinarily be line power. Power source 16 is connected to motor 14 via motor contactor 18 relay having motor contacts 18a - d. Motor contact 18d appears in Figure 2c and serves as a switching device in the 20 low voltage control circuit. The automatic emergency engine start system 100 is powered by the engine battery and includes a power detection relay, or PDR, 20 having three inputs 20a - c connected, respectively, to lines 16a c, which each respectively, carry one-phase of the three-phase power. 25 Power detection relay, PDR, 20 serves as a power monitor and is connected to automatic engine starting controller 22 and supplies a signal thereto whenever a loss of power in any phase, or a low voltage condition i3 detected. Automatic engine starting controller 22 has two alternative outputs. 30 The first output is supplied via line 22a to electric drive control system 24 which is connected via examplary line 34a to solenoid 19 of motor contactor 18. The output supplied via line 24a is necessary for operation of the system on electric drive whereby motor 14 is powered. Although not ° - 6 - specifically illustrated, the outputs represented by exemplary line 24a would also include a direction calling for either heating or cooling as well as control signals to control the refrigeration system as represented by servo valves SV1, SV2 5 and SV3 which appear in Figure 20. The second output is supplied via line 22b to engine drive control system 26 which includes the ARM and is connected via exemplary lines 26a -c to engine 12. The outputs supplied via exemplary lines 26a - c are necessary for starting and controlling the 10 engine, as is standard with ARM control, as well as the outputs needed for engine operation which, typically, include the glow plugs, run solenoid, speed solenoid, start motor cranking, heating relay and evaporator motor. These outputs, like the output, represented by exemplary line 24a would 15 also include a direction calling for either heating or cooling as well as control signals to control the refrigeration system as represented by servo valve SVl, SV2 and SV3. A load temperature control sensor 30 senses the temperature of the load and supplies the information to electric 20 and engine drive control systems 24 and 26, respectively, which are illustrated as separate but would ordinarily be part of a single device or circuit.
The operation of the Figure 1 system would be with either 25 engine 12 or motor 14 as the prime mover for driving refrigeration compressor 10 in response to a cooling (or heating) demand sensed by load temperature sensor 30. The compressor 10 is operated whenever the temperature of the load reaches a first temperature and is kept running until the load 30 temperature is brought down to a second temperature which is lower than the first temperature, when operating in the cooling mode. Compressor 10 is connected to engine 12 via drive belt 11 and a centrifugal clutch (not illustrated) so that it freewheels whenever motor 14 is the prime mover. 35 Compressor 10 is also connected to electric motor 14 via 4 drive belt 13 and, in the absence of an electric field, the rotors (not illustrated) freely rotate when diesel engine 12 is the prime mover. The automatic emergency start system 100 controls the operation of compressor 10 in all modes of non-highway operation by starting engine 12 or running motor 14 in response to load temperature requirements sensed by temperature sensor 30. When the reefer unit is connected to line power, the line power is monitored by PDR 20 and, if correct, automatic engine starting controller 22 provides a signal to electric drive control system 24 which, in turn, when load temperature requirements demand, operates coil 19 of motor contactor 18 via exemplary line 24a to cause power from power source 16 to be supplied to electric motor 14 which drives compressor 10 while the centrifugal clutch of engine 12 freewheels.
If PDR 20 detects an interruption of power in any one of lines 16a - c, or a low voltage condition, a signal indicative thereof is supplied to automatic engine starting controller 22. Controller 22 would then send a first signal to electric drive control system 24 which would cause motor contactors 18a - d to be disabled thereby disabling electric motor 14. Additionally, controller 22 would furnish a second output to engine drive control system 26 and, if a simultaneous cooling (heating) requirement is detected by sensor 30, signals are provided via exemplary lines 26a - c thereby causing engine 12 to be started. Engine 12 would continue to run until the temperature requirement is satisfied, even if line power is restored while engine 12 is running.
The automatic emergency start system serves as a back-up system on truck/trailer units equipped with standby motors. The system changes the operating mode of the unit from electric drive to engine drive in the event of a power outage or - 8 - a low voltage condition. If power is restored and cargo temperature requirements are satisfied, the system would return to electric drive when a cooling (heating) need arises, other conditions remaining constant. 5 The PDR 20, automatic engine starting controller 22 and electric drive control system 24 are integrated into the circuits defining the engine drive control system 26 so that the electrical connections between the members defining the 10 present invention do not form a part of the present invention. Referring now to Figures 2A - D, automatic engine starting controller 22 is made up of a number of circuits and components which are labeled 22-1 through 22-5 since, as noted, they are integrated into existing circuits and are 15 separated thereby. Thus, as would be conventional for a reefer unit for a diesel truck, the circuitry includes a 12 volt battery 8TY, alternator ALT, circuit breakers CB-1, CB-2 and CB-3, evaporator fan motor EM, evaporator motor relay EMR having contacts EMR-1 and fuel pump FP. Other components 20 include normally closed high pressure cut-out switch HPl, heat relay HR having contacts HR-1, normally open engine oil pressure safety switch OP, normally closed standby oil pressure safety switch OPS, run solenoid RS, speed controlled solenoid SCS, starter motor SM, speed relay SR 25 having contacts SR-1 and SR-2 and starter solenoid SS having controls SS-1. Additional components include auto restart light: ARL, defrost air switch DA, glow-defrost switch GDS, normally open condenser pressure control servo valve SVl, normally closed liquid servo valve SV2, normally closed hoc 30 gas servo valve SV3, temperature selector (thermostat) TSP, and normally closed water temperature switch WT. - 9 - Referring now to Figures 2 A - D, in operation, selector switches SSW-1 and SSW-2 are each placed in standby which is designated by contacts S rather than being connected to the engine which is designated by contacts E. However, 5 contact E of switch SSW-2 is not connected to anything and serves as an "off" position. The engine automatic start switches EAS-1, and EAS-3 are placed in the automatic position designated by contacts AUTO, rather than the manual position designated by contacts MAN, whereby switches Xo EAS-1 and EAS-2 are connected to ARM. Switch EAS-3 is connected to contact AUTO which does not lead anywhere but is in an "off" position relative to contact MAN which disables the ARM. The ganged start-run-stop switch SRS is placed in the run position designated by contacts RUN. 15 Assuming that the unit is operating normally in the "standby" mode, it will cool or heat, as required, to maintain the load temperature. If a power failure occurs in all or any one of legs 16a - c of the three-phase power leads, or if a low voltage condition exists, it is detected by 20 power detection relay, PDR 20 and normally open contacts PDR-1 open and normally closed contacts PDR-2 close. If all three legs of power are present contacts PDR-2 would be open, thus preventing the flow of power to override relay OR thereby causing contacts OR-1 to close and contacts 25 OR-2 and OR-3 to open.
Recycle delay timers RDT-1 and RDT-2 are physcially identical components, but they are connected differently to achieve different results. RDT-1 controls time delayed 30 override relay ORT in that if RDT-1 is triggered it remains open for five minutes so that ORT is not energized. RDT-2 prevents shore cycling of the standby motor by inhibiting the motor from starting for five minutes after it: was last shut off by controlling motor contactor relay 35 18. Thus, if the reefer unit is requiring cooling (or i - 10 - heating) as sensed by sensor 30 which furnishes a signal indicative thereof to temperature control module TCM, and if recycle delay timer RDT-2 is not preventing starting due to a five minute delay to prevent short cycling by 5 keeping the contacts of motor contactor relay 18 open, current is supplied to run relay RR, through contacts PDR-2, through selector switch SSW-2 to energize the override relay, OR, coil. OR contacts OR-1 open while contacts OR-2 and OR-3 close "latching" the OR coil. The only way that 10 OR coil can drop out is if the unit shuts down by dropping out the run relay RR. The reefer unit must go through one complete auto-start cycle before returning to standby. This insures that temperature requirements are satisfied and the battery BTY is fully charged before the unit returns to standby. 15 At the same time that override relay OR is energized, the trigger circuit of RDT-1 is energized, current is prevented from energizing the coil of ORT, thus contacts ORT-1 are closed for a minimum of five minutes. 20 Current flow through ORT-1 from common terminal C to terminal E of SSW-1 through engine automatic start switch EAS-3 to energize the auto-restart module ARM. When contacts GPR-l of glow plug relay GRP close (approximately 50 milliseconds 25 after ARM is energized) glow plugs, of which GP-1 to 3 are exemplary, are energized and current flows to run relay RR, causing contacts RR-1 and 2 to close, and through the trigger circuit of RDT-2. The contacts of R0T-3 then de-energises all standby circuitry. Run relay RR remains energized 30 through the ARM before the standby circuitry is de-energized to prevent a relay race.
After about thirty seconds, the ARM should seasrt the unit on engine drive. When the engine starts cr&nking, normally -11- closed, pressure responsive, oil pressure safety switch, OPS, opens and acts as a back-up safety to de-energize the standby circuitry. If the unit started properly on the first attempt, the unit would run in the engine auto-start 5 mode until the following conditions were met: (1) the unit had run for a minimum of eight minutes; (2) the battery was restored to a fully charged condition; and (3) thermal sensor 30 called for a shutdown, breaking the run relay circuit RR and opening contacts RR-1. All logic would then 10 switch back to standby and await sensor 30 calling for another run. If proper three-phase power had been reestablished, the unit would restart on standby. If the three-phase power was still off, the unit would repeat the cycle and run another engine auto start cycle.
IS If the unit failed to start after three starting attempts, fault circuitry is energized whereby fault relay FR and fault light FL are energized. Normally open contacts FR-2 close thereby latching the coil of FR and FL is kept lit 20 until manually reset with start-stop-run switch SRS. The five minute minimum closure time for the contacts ORT-1 insures that three starting attempts can be made, if necessary. At the same time that contacts FR-2 are closed, normally closed contacts FR-1 are opened de-energizing any load on 25 unit battery BTY except for fault relay FR, fault light FL and power-on light PL. The unit can then only operate on standby and only if three - phase power has been reestablished, i.e. contacts PDR-1 close. The ARM is inoperable after three attempts have failed to start the unit until 30 manually reset with SRS switch. Power-on light PL is always on as a safety precaution to warn that three-phase power could be re-established in the control box at any time. Alternatively, override relay OR can be time-delayed to prevent a changeover for momentary power losses. ) - 12 - Although a preferred embodiment of the present invention has been illustrated and described, other changes will occur to those skilled in the art. It is, therefore, intended that the present invention is to be limited only by the appended claims. the scope of the scope of 4
Claims (7)
1. In a refrigeration unit having a prime mover and adapted to be connected to a source of electrical power, an automatic emergency prime mover starting system comprising means for sensing the temperature of a load in said refrigeration unit; means for starting said prime mover responsive to the sensed temperature of the load reaching a first predetermined temperature and for keeping said prime mover running until the sensed temperature of the load reaches a second predetermined temperature; means for connecting said refrigeration unit to said source of electrical power and for disabling said prime mover; means for monitoring said source of electrical power; and means for disconnecting said source of electrical power and for enabling said prime mover upon a sensed failure of said source of electrical power and a concurrent sensed load temperature reaching said first predetermined temperature whereupon said means for starting said prime mover is activated and said prime mover is run until said sensed temperature of the load reaches said second predetermined temperature.
2. The automatic emergency starting system of claim 1 further comprising means for reconnecting said source of electrical power and for disabling said prime mover upon sensing the re-establishment of said source of electrical power and the stopping of said prime mover responsive to sensed load temperature reaching said second predetermined temperature. - 14 -
3. A method for automatically starting a disabled prime mover of a refrigeration unit upon the failure of a source of electrical power connected to said refrigeration unit comprising the steps of: 5 connecting the refrigeration unit to said source of electrical power; disabling the prime mover; sensing the temperature of the load in the refrigeration unit; 10 monitoring the source of electrical power; upon the sensing of a failure of the source of electrical power, disconnecting the source of electrical power and enabling and starting the prime mover if the sensed load temperature has reached a first predetermined 15 temperature.
4. The method of claim 3 further including the steps of reconnecting the source of electrical power and disabling the prime mover upon the sensing of the re- 20 establishment of the source of electrical power and the stopping of the prime mover responsive to sensed load temperature reaching a second predetermined temperature.
5. The method of claim 3 wherein said step of 25 monitoring includes the sensing of a low voltage condition.
6. An automatic emergency starting system substantially as herein described with reference to and as shown in the accompanying drawings.
7. A method for automatically starting a disabled prime mover of a refrigeration unit substantially as herein described. MACLACHLAN & DONALDSON, Applicants' Agents, 47 Merrion Square, DUBLIN 2. CARRIER CORPORATION S A 7 6 0 FIVE SHEETS SHEET ONE >+. MACLACHLAN & DONALDSON
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US64958984A | 1984-09-12 | 1984-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE852167L true IE852167L (en) | 1986-03-12 |
| IE56760B1 IE56760B1 (en) | 1991-12-04 |
Family
ID=24605457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE2167/85A IE56760B1 (en) | 1984-09-12 | 1985-09-03 | Refrigeration unit |
Country Status (5)
| Country | Link |
|---|---|
| BR (1) | BR8504397A (en) |
| FR (1) | FR2570170B1 (en) |
| GB (1) | GB2164433B (en) |
| IE (1) | IE56760B1 (en) |
| IT (1) | IT1185710B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0168094B1 (en) * | 1993-10-19 | 1999-01-15 | 김광호 | Operating control device and its control method of airconditioner |
| US5487278A (en) * | 1994-05-06 | 1996-01-30 | Kenneth J. Hartman | Back-up switching system for refrigerator trucks |
| GB2293703A (en) * | 1994-09-27 | 1996-04-03 | Kirknalls Refrigeration | Mains failure protection for refrigerated loads |
| CN1055574C (en) * | 1996-03-06 | 2000-08-16 | 杨泰和 | Automatically-monitored and engine-driven assistant accumulator charging system |
| US8590330B2 (en) | 2010-06-03 | 2013-11-26 | Thermo King Corporation | Electric transport refrigeration unit with temperature-based diesel operation |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE19858E (en) * | 1936-02-18 | Refrigerating apparatus | ||
| US2015309A (en) * | 1934-02-16 | 1935-09-24 | Igarashi Tomehiko | Automatic starting and stopping apparatus for a diesel engine |
| GB450581A (en) * | 1935-05-09 | 1936-07-21 | Petters Ltd | Improvements in and relating to the automatic starting and stopping of electric generating sets driven by internal combustion engines |
| US2879757A (en) * | 1955-03-10 | 1959-03-31 | Asea Ab | Starting device for reserve aggregates driven by a combustion engine |
| US3283525A (en) * | 1964-04-09 | 1966-11-08 | Westinghouse Electric Corp | Electrical control for a refrigeration system |
| FR1567179A (en) * | 1968-02-14 | 1969-05-16 | ||
| US3512373A (en) * | 1968-07-12 | 1970-05-19 | Transicold Corp | Refrigeration system with electric auxiliary prime mover |
| US3926167A (en) * | 1971-08-26 | 1975-12-16 | Woods M Bruce | Starting circuit for engine utilizing fuel injection pump |
| ES415942A1 (en) * | 1973-06-15 | 1976-02-01 | Rivera Macias | Automatic stopping and starting apparatus of industrial cold generators moved by gas-oil engine. (Machine-translation by Google Translate, not legally binding) |
| US4467615A (en) * | 1982-01-15 | 1984-08-28 | Sencon Engineering Inc. | Control system for diesel powered refrigeration plant |
| US4460834A (en) * | 1983-08-29 | 1984-07-17 | Power Group International Corp. | Uninterruptible power system |
-
1985
- 1985-08-23 GB GB08521179A patent/GB2164433B/en not_active Expired
- 1985-09-03 IE IE2167/85A patent/IE56760B1/en not_active IP Right Cessation
- 1985-09-10 FR FR8513407A patent/FR2570170B1/en not_active Expired
- 1985-09-11 BR BR8504397A patent/BR8504397A/en not_active IP Right Cessation
- 1985-09-12 IT IT22120/85A patent/IT1185710B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| BR8504397A (en) | 1986-07-08 |
| FR2570170A1 (en) | 1986-03-14 |
| GB2164433A (en) | 1986-03-19 |
| IT8522120A0 (en) | 1985-09-12 |
| IE56760B1 (en) | 1991-12-04 |
| IT1185710B (en) | 1987-11-12 |
| GB8521179D0 (en) | 1985-10-02 |
| GB2164433B (en) | 1987-12-16 |
| FR2570170B1 (en) | 1988-02-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Patent lapsed |