GB1414417A - Temperature control system with multiple thermostats - Google Patents

Temperature control system with multiple thermostats

Info

Publication number
GB1414417A
GB1414417A GB2589273A GB2589273A GB1414417A GB 1414417 A GB1414417 A GB 1414417A GB 2589273 A GB2589273 A GB 2589273A GB 2589273 A GB2589273 A GB 2589273A GB 1414417 A GB1414417 A GB 1414417A
Authority
GB
United Kingdom
Prior art keywords
signal
compressor
temperature
operational amplifier
ride
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.)
Expired
Application number
GB2589273A
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.)
Borg Warner Corp
Original Assignee
Borg Warner 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 Borg Warner Corp filed Critical Borg Warner Corp
Publication of GB1414417A publication Critical patent/GB1414417A/en
Expired legal-status Critical Current

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
    • 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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
    • G05D23/1928—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperature of one space
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
    • G05D23/193—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
    • G05D23/1935—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces using sequential control
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors
    • 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
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2501—Bypass valves

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Air Conditioning Control Device (AREA)
  • Control Of Temperature (AREA)

Abstract

1414417 Automatic control of temperature BORG-WARNER CORP 30 May 1973 [12 July 1972] 25892/73 Heading G3R In a temperature control arrangement for a cooling system (e.g. for foodstuffs in a railway box car) which discharges air into a space and receives return air from the same space, a selector circuit 13, Fig. 1 detailed in Fig. 2 (not shown), selects either a thermostat (e.g. thermistor) 10 or 11, disposed in return and discharge air ducts respectively, depending upon whether a desired temperature set signal from a unit 14 (e.g. a pot), is above or below a first reference value signal (e.g. 32‹F) respectively. A comparator 21 compares the sensed temperature with the set value and produces an error signal in a line 24 for regulating cooling and heating stages as a function thereof. The set temperature signal is compared with a second reference signal in a heat over-ride comparator circuit 30, Fig. 1 which produces an output to over-ride the control signal from comparator 21 and prevents operation of heating equipment if the set signal calls for a temperature lower than the value (e.g. 20‹F) represented by the second reference signal. When a cooling demand signal appears in lines 24, 25 a compressor 1 is first turned on by an operational amplifier 85 Fig. 3 via a transistor 107. To prevent rapid cycling ON/OFF by the first compressor as the sensed temperature changes, a time delay circuit including FET 111 introduces a delay of 3 minutes before the operational amplifier 85 can switch the compressor 1 ON again. If the first compressor I is insufficient to meet demand, a second compressor Z is switched ON by an operational amplifier 87. A time delay circuit including FET-151 prevents simultaneous switching ON of both compressors. An operational amplifier 90 is arranged to control a heating coil unit via Tr 96 and relay (not shown), when the error signal level exceeds the reference signal level in line 49, provided that a heat over-ride signal is not present in line 32.
GB2589273A 1972-07-12 1973-05-30 Temperature control system with multiple thermostats Expired GB1414417A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27108772A 1972-07-12 1972-07-12

Publications (1)

Publication Number Publication Date
GB1414417A true GB1414417A (en) 1975-11-19

Family

ID=23034139

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2589273A Expired GB1414417A (en) 1972-07-12 1973-05-30 Temperature control system with multiple thermostats

Country Status (8)

Country Link
US (1) US3768545A (en)
JP (1) JPS5631493B2 (en)
AU (1) AU473506B2 (en)
CA (1) CA1003531A (en)
DE (1) DE2334508B2 (en)
FR (1) FR2192280B1 (en)
GB (1) GB1414417A (en)
IT (1) IT992618B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3015226A1 (en) * 1979-04-26 1980-10-30 Matsushita Electric Ind Co Ltd OPERATING TIME CONTROL ARRANGEMENT
GB2131144A (en) * 1982-05-20 1984-06-13 Mitsubishi Heavy Ind Ltd Temperature control device for a refrigerating apparatus associated with heating and cooling means
GB2136988A (en) * 1983-03-16 1984-09-26 Pixel Plus Limited Central heating boiler control unit
GB2151819A (en) * 1983-12-19 1985-07-24 Bernard Joseph Jelley Boiler control system
EP0158581A2 (en) * 1984-04-06 1985-10-16 Carrier Corporation Method and control system for protecting an evaporator in a refrigeration system against freezeups

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3949807A (en) * 1974-08-30 1976-04-13 Robertshaw Controls Company Air conditioning system with integral energy conserving elements
FR2288971A1 (en) * 1974-10-25 1976-05-21 Radiotechnique Compelec TEMPERATURE SENSOR DEVICE PROVIDING A PLURALITY OF SETPOINT VOLTAGES FROM A SINGLE PROBE
ES439087A1 (en) * 1975-07-02 1977-03-01 Peter Wolfwenderoth Temperature regulator
CH613507A5 (en) * 1975-07-04 1979-09-28 Meulen Theo V D
US4138627A (en) * 1975-09-02 1979-02-06 Hughey And Phillips, Inc. Current-level-sensitive switching system
US4067203A (en) * 1976-09-07 1978-01-10 Emerson Electric Co. Control system for maximizing the efficiency of an evaporator coil
US4138607A (en) * 1977-06-24 1979-02-06 Pako Corporation Dual priority temperature control
US4236084A (en) * 1978-10-26 1980-11-25 Gingras Richard P Apparatus and method for in-line energization and de-energization of external loads in series with an external source of electricity in response to externally sensed parameters
US4323112A (en) * 1979-03-06 1982-04-06 Mark Controls Corporation No energy band temperature control
US4353409A (en) * 1979-12-26 1982-10-12 The Trane Company Apparatus and method for controlling a variable air volume temperature conditioning system
US4333519A (en) * 1980-05-08 1982-06-08 Doron Shafrir Controller for air conditioning units, heating units and the like
AU8154082A (en) * 1981-03-17 1982-09-23 Sea Containers Ltd. Cargo refrigeration
US4429829A (en) 1981-11-20 1984-02-07 Mallinckrodt, Incorporated Interactive dual probe temperature control system
US4538672A (en) * 1982-07-02 1985-09-03 Conoco Inc. Tracking temperature controller apparatus
DE3326977A1 (en) * 1983-07-27 1985-02-07 Bruno 7441 Wolfschlugen Kümmerle Cooling set for electrical switch cabinets
KR900002143B1 (en) * 1985-03-29 1990-04-02 미쯔비시 덴끼 가부시기가이샤 Duct type multizone air-conditioning system
US4694890A (en) * 1985-04-15 1987-09-22 Dianalog Systems, Inc. Analog computer variable duty modulator
CA2059325A1 (en) * 1991-01-15 1992-07-16 Greg Truckenbrod Refrigeration temperature control system
JPH09210063A (en) * 1996-02-02 1997-08-12 Toshiba Mach Co Ltd Temperature control method and device for operating oil used for static pressure bearing
US6176306B1 (en) 1997-07-01 2001-01-23 Robert Gault Method and device for controlling operation of heat pump
IT1311289B1 (en) * 1999-12-28 2002-03-12 Miller Europe Spa THERMOSTAT, IN PARTICULAR FOR HOUSEHOLD APPLIANCES.
WO2012047938A2 (en) * 2010-10-04 2012-04-12 Global Solar Water And Power Systems, Inc. Multiplatform heating ventilation and air conditioning control system
US10808961B2 (en) 2013-08-30 2020-10-20 James Leych Lau Energy saving controller
US10119719B2 (en) * 2013-08-30 2018-11-06 James Leych Lau Energy saving controller
US20170102157A1 (en) * 2015-10-09 2017-04-13 General Electric Company Air conditioner units and methods for determining indoor room temperatures

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689932A (en) * 1947-08-02 1954-09-21 Bailey Meter Co Balanceable network electric measuring system
US2602591A (en) * 1948-11-15 1952-07-08 Honeywell Regulator Co Condition control apparatus
US3144991A (en) * 1963-02-05 1964-08-18 Henry F Marchant Hot water heating system having a wide range temperature equalizer control
US3292689A (en) * 1964-07-07 1966-12-20 Kimurakoki Co Ltd Platefin-type heat exchanger and method of making same
US3500898A (en) * 1968-08-26 1970-03-17 Borg Warner Control system for multi-stage heating and cooling system
GB1293132A (en) * 1968-11-12 1972-10-18 Gulton Europ Ltd Improvements in or relating to temperature controllers
US3616846A (en) * 1969-11-17 1971-11-02 Borg Warner Control system for heating and/or cooling system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3015226A1 (en) * 1979-04-26 1980-10-30 Matsushita Electric Ind Co Ltd OPERATING TIME CONTROL ARRANGEMENT
GB2131144A (en) * 1982-05-20 1984-06-13 Mitsubishi Heavy Ind Ltd Temperature control device for a refrigerating apparatus associated with heating and cooling means
US4509586A (en) * 1982-05-20 1985-04-09 Mitsubishi Jukogyo Kabushiki Kaisha Temperature control device for a refrigerating apparatus having both a heating means and a cooling means
GB2136988A (en) * 1983-03-16 1984-09-26 Pixel Plus Limited Central heating boiler control unit
GB2151819A (en) * 1983-12-19 1985-07-24 Bernard Joseph Jelley Boiler control system
GB2151815A (en) * 1983-12-19 1985-07-24 Bernard Joseph Jelley An electronic switching device fitted to boilers to save fuel
EP0158581A2 (en) * 1984-04-06 1985-10-16 Carrier Corporation Method and control system for protecting an evaporator in a refrigeration system against freezeups
EP0158581A3 (en) * 1984-04-06 1988-08-17 Carrier Corporation Method and control system for protecting an evaporator in a refrigeration system against freezeups

Also Published As

Publication number Publication date
FR2192280A1 (en) 1974-02-08
FR2192280B1 (en) 1976-04-30
DE2334508A1 (en) 1974-01-24
JPS5631493B2 (en) 1981-07-22
AU5623473A (en) 1974-12-05
DE2334508B2 (en) 1979-03-29
US3768545A (en) 1973-10-30
IT992618B (en) 1975-09-30
JPS4952342A (en) 1974-05-21
CA1003531A (en) 1977-01-11
AU473506B2 (en) 1976-06-24

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee