GB2240640A - An automatic control for water-heating apparatus - Google Patents

An automatic control for water-heating apparatus Download PDF

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Publication number
GB2240640A
GB2240640A GB9101562A GB9101562A GB2240640A GB 2240640 A GB2240640 A GB 2240640A GB 9101562 A GB9101562 A GB 9101562A GB 9101562 A GB9101562 A GB 9101562A GB 2240640 A GB2240640 A GB 2240640A
Authority
GB
United Kingdom
Prior art keywords
automatic control
display
water
microcomputer
fault
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
GB9101562A
Other versions
GB9101562D0 (en
GB2240640B (en
Inventor
Dietmar Manz
Franz-Josef Wertenbruch
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.)
Vaillant GmbH
Original Assignee
Joh Vaillant GmbH and Co
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 Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
Publication of GB9101562D0 publication Critical patent/GB9101562D0/en
Publication of GB2240640A publication Critical patent/GB2240640A/en
Priority to IDP299692A priority Critical patent/ID920B/en
Application granted granted Critical
Publication of GB2240640B publication Critical patent/GB2240640B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/082—Regulating fuel supply conjointly with another medium, e.g. boiler water using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/26—Details
    • F23N5/265—Details using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/281—Input from user
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/395—Information to users, e.g. alarms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
    • F24H15/429—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data for selecting operation modes
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0428—Safety, monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/19—Measuring temperature outlet temperature water heat-exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/20—Warning devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/23—Pc programming
    • G05B2219/23028—Switch function of panel, detect this and execute other orders

Abstract

An automatic control for a gas-fired water-heating apparatus comprises a microcomputer as a central control unit. The unit (13) can be switched between an input mode and a maintaining mode at least. A keyboard (14) and an at least three-digit, and preferably alphanumeric display means (15) is connected by control lines (16) and data lines (17) to the microcomputer (12). At least one selector key (14') of the keyboard (14) serves to switch from monitoring operation to an inputting operation and to a servicing operation. The remaining keys (14'', 14''') may be used to effect operational data during an inputting operation and for a setting of apparatus parameters, for fault diagnosis, or for a sampling of points of measurement, during a servicing operation. Fault messages are displayed with priority over other displays. <IMAGE>

Description

t 1 12 12 - 4 C-') 6,: - o, C) An automatic control for water-heatinq
aiDparatus This invention relates to an automatic control for water-heating apparatus, especially but not exclusively gas-fired water-heating apparatus, such as circulating water-heating means provided with a heater for water consumption, which heating means may for example be one which can be changed over from supplying hot water for a heating system to supplying hot water for consumption, or for a flow heater, or hot-water storage apparatus, which control comprises as a central automatic control unit a microcomputer, to which are connected components and sensors of the apparatus for automatic control, such as a circulating pump, a fan, valves, igniting means or automatic fuel-firing means, a temperature feeler, and a flame monitor.
In previously proposed gas-fired water heaters in which microprocessors or microcomputers are used to control the apparatus said microprocessors or microcomputers are used to evaluate the operational data furnished by sensors of the gas-fired apparatus and to control and 'monitor the final control elements, for example the valves, and the igniting means, in accordance with predetermined algorithms and optionally in dependence upon externally provided desired values, such as a preselected temperature of a room thermostat. In such control means a display of operational data by display means is not necessary, and for this reason such display is not contemplated. EP-B 173,717 describes such an automatic control of a gas-fired heating boiler by a microprocessor. That plant does not comprise means for a display of operational states by a display unit.
It is also usual to provide heating apparatus with microcomputer controllers which have a higher rank than the control means of the apparatus. Such controllers provide desired values for the control means of the apparatus and said desired values are determined in dependence upon timing programs or on other parameters, such as the heating-up time, and the temperature- lowering time, which have been preselected by the user. For the selection of such parameters it is necessary that such control apparatus enters into a dialogue with the user and for this reason they require a display unit with controls, and the display may be controlled by the microprocessor or mcirocomputer.
Finally gas equipment control means have already been proposed which have a fault code and status display.
Such controls have only a one-digit seven segment display, which can display only a few status messages or fault messages, such as a message that the burner is on, or that there is a fault in automatic fuel-firing means.
The previously proposed apparatus has the disadvantage that a subsequent adjustment of heating apparatus in view of new safety regulations or for an energy-saving operation, for a desired exhaust gas j.
V 4 temperature, for an adaptation to the locally existing gas pressure and for similar servicing work or for a diagnosis and elimination of faults, can be effected only at a considerable expenditure. In most cases it is necessary to use external measuring instruments and this requires, inter alia, a demounting of the apparatus housing for an access to points of measurement. On the other hand, where an error code and status display is provided, the information which is furnished will not be adequate for a fast and reliable diagnosis, particularly in case of unusual faults.
For this reason it is an aim of the present invention to obviate the disadvantages set forth.
Accordingly, the present invention is directed to a control as set out in the opening paragrah of the present specification in which an input-enquiry control unit, comprising a keyboard and at least three-digit and preferably alphanumeric display means, is connected by control lines and data lines to the microcomputer, the keyboard comprises at least three keys, at least one of which is a selector key for switching from the display of actual operational data, such as the flow temperature or room temperature, during normal operation, to an inputting operation and/or to a servicing operation, and the remaining keys serve to change operational data during an inputting operation and for a setting of apparatus parameters, for example for fault diagnosis, or for a sampling of points of measurements, during a servicing operation.
Preferably, a read-only memory is provided, which is particularly programmable and erasable and which contains apparatus-specific limit data for fault detection, which data are compared in a time-division multiplex operation with actual operational state parameters, wherein a critical approach of the latter to the limit data in the read-only memory will result in a corresponding fault signal on the display means with priority over other displays.
For an emphasis of apparatus faults it is contemplated within the scope of the present invention that a flasher circuit is associated with multicolour- illuminating means, for the display means and with the selector key, said flasher circuit effecting an intermittent interruption of the power supply for the illumination during a servicing operation after an occurrence of an apparatus fault. 20 Further desirable features are set out in the dependent claims 4 to 10. It will be appreciated that the present invention permits a definite display of a multiplicity of operational states and a misinterpretation of operational data will be less likely because a separate code may be associated with each component of the apparatus and each point or measurement in the heating apparatus. In case of 2% a multidigit, alphanumeric display field it is possible to designate points of measurement and apparatus component even by plain text. In normal operation, the display field may indicate to the user, for example, actual states, such as room-temperature and liquid level in storage apparatus. After a switching to an inputting operation has been effected by means of the selector key, the user can actuate the remaining keys for setting or changing certain operational values and the corresponding values will be displayed in a clear and comprehensible manner on the display field.
A switching to a servicing operation will permit a person skilled in the art to enter into a detailed dialogue with the automatic control system and it will then be possible to sample and adjust particularly states of detailed components of the apparatus, for example those of the automatic fuel- firing means, the fan control, and the position of the exhaust gas damper, also to obtain readily actual and statistical data, such as the average igniting time, and the number of faults. A separate chimneysweep measuring operation, that is to say a prescribed check of certain operational states, can be performed in a simple manner. The error messages are specific so that a prolonged search for defects can be avoided.
An example of a control made in accordance with the present invention is illustrated in the accompanying drawings, the only Figure of which shows circuitry of the control diagrammatically.
Water-heating apparatus 1 comprises a heat source in the f orm of a gas burner 2, which is connected 5 to a gas line 3 by a valve 4 4 01. such as a solenoid valve, and with which a heat exchanger 8 is associated. The heat exchanger 8 is connected by a flow line 10 and a return line 9, which incorporates a circulating pump 11, to the heating circuit of circulating-water heater means.
The automatic control and control system of the waterheating apparatus 1 comprises as a central control unit a microcomputer 12, which has connected to it a flow temperature sensor 18, a flame monitor 71 with an associated flame probe 7, igniting means 5 for applying a high voltage to an igniting electrode 6, and an actuator 41 for the valve 4. Data lines 17 and control lines 16 lead from the microcomputer 12 to an input-enquiry control unit 13, which is provided with a key-board 14 and threedigit digital display means 15. The keyboard 14 consists of three keys 14f, 14", 14100. A selector key 141 serves to switch from the normal operation. The two remaining keys 1411, 14111 are provided for a change of operational data during an inputting operation and for a setting of apparatus parameters, for example for fault diagnosis, or for a sampling of points of measurement, during a servicing operation.
1 1 j claims 1. An automatic control for water-heating apparatus, especially but not exclusively gas-fired water-heating apparatus, such as circulating water-heating means provided with a heater for water consumption, which heating means may for example be one which can be changed over f rom. supplying hot water f or a heating system to supplying hot water for consumption, or for a flow heater, or hot-water storage apparatus, which control comprises as a central automatic control unit a microcomputer, to which are connected components and sensors of the apparatus for automatic control, such as a circulating pump, a fan, valves, igniting means or automatic fuel-f iring means, a temperature feeler, and a flame monitor, in which an input-enquiry control unit, comprising a keyboard and at least three-digit and preferably alphanumeric display means, is connected by control lines and data lines to the microcomputer, the keyboard comprises at least three keys, at least one of which is a selector key for switching from the display of actual operational data, such as the f low temperature or room temperature, during normal operation, to an inputting operation and/or to a servicing operation, and the remaining keys serve to change operational data during an inputting operation and for a setting of apparatus parameters, for example for fault diagnosis, or for a sampling of points of measurements, during a servicing operation.
2. An automatic control according to claim 1, in which a read-only memory is provided, whichis programmable and erasable and which contains apparatus- specific limit data for fault detection, which data are compared in a time-division multiplex operation with actual operational state parameters, wherein a critical approach of the latter to the limit data in the read-only memory will result in a corresponding fault signal on the display means with priority over other displays.
3. An automatic control according to claim 1 or claim 2, in which a flasher circuit is associated with multicolour-illuminating means, for the display means and with the selector key, said flasher circuit effecting an intermittent interruption of the power supply for the illumination during a servicing operation after an occurrence of an apparatus fault.
4. An automatic control according to any preceding claim, in which the flow temperature as a numerical value succeeded by a degree symbol is displayed by the display means whenever the user does not actuate the keyboard and there are neither fault states nor special operational states in the apparatus.
5. An automatic control according to any preceding claim, in which during a chimneysweep, measuring operation, the display means displays a corresponding text in tine alternation with the flow temperature.
1 C.
1 6. An automatic control according to any preceding claim, in which in case of an occurrence of a fault state of the water-heating apparatus the display device means terminate the display of the flow temperature and any existing text indicating a chimneysweep measuring operation and display instead a fault code which is designated by a fault symbol.
7. An automatic control according to any preceding claim, in which the actual operational state of the water- heating apparatus is displayed on the display means by means of a selector key and that display mode is characterized by a symbol and can be terminated by means of the selector key.
8. An automatic control according to any preceding 15 claim, in which a diagnosing mode is initiated by a simultaneous actuation of the setting keys and in said diagnosing mode a diagnosis number can be selected by means of the setting keys and the information associated with that number is displayed by a subsequent actuation of the selector key and, if that information designates an adjustable system parameter, said information can be adjusted by means of the setting keys, and the diagnosing mode can be terminated by a simultaneous actuation of the two setting keys.
9. An automatic control according to any preceding claim, in which a diagnosing mode is initiated by a simultaneous actuation of the setting keys and in said - 10 diagnosing mode a specific diagnosis number can be selected by means of the setting keys and said diagnosis number upon an actuation of the selector key will result in a specific diagnosing mode, in which all addresses of the data memory of the microcomputer can be selected by means of the setting keys and the information contained at said addresses will then be caused to be displayed by means of the selector key, and said specific diagnosing mode can be terminated by a simultaneous actuation of the two setting keys.
10. An automatic control according to claim 1 or to any one of claims 4 to 9, in which the display modes are automatically terminated when a maximum time has elapsed since the last actuation of the keyboard.
11. An automatic control for water-heating apparatus, substantially as described hereinwith reference to the accompanying drawing.
published 1991 atThe Patent Office. State House. 66/71 High Holborn, LondonWC I R47?. Further copies rnay be obtained front Sales Branch. Unit 6. Nine Mile Point. Cwmfelinfach. Cross Keys. Newport. NPI 7HZ. Printed by Multiplex techniques lid. St Mary Cray, Kent.
GB9101562A 1990-01-25 1991-01-24 An automatic control for water-heating apparatus Expired - Fee Related GB2240640B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IDP299692A ID920B (en) 1991-01-17 1992-05-15 NEW COMPOSITION FOR MAKING NOBLE METAL COATING ON PORCELINE AND GLASS OBJECTS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0016490A AT400484B (en) 1990-01-25 1990-01-25 CONTROL AND CONTROL SYSTEM FOR A PREFERRED GAS HEATED WATER HEATER

Publications (3)

Publication Number Publication Date
GB9101562D0 GB9101562D0 (en) 1991-03-06
GB2240640A true GB2240640A (en) 1991-08-07
GB2240640B GB2240640B (en) 1994-05-25

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Family Applications (1)

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GB9101562A Expired - Fee Related GB2240640B (en) 1990-01-25 1991-01-24 An automatic control for water-heating apparatus

Country Status (8)

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AT (1) AT400484B (en)
BE (1) BE1005233A6 (en)
CH (1) CH683457A5 (en)
DE (2) DE9100806U1 (en)
FR (1) FR2657418B1 (en)
GB (1) GB2240640B (en)
IT (1) IT1245109B (en)
NL (1) NL9100098A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256940A (en) * 1991-06-20 1992-12-23 Drayton Controls Air conditioning controller display.
EP0855637A1 (en) * 1997-01-23 1998-07-29 Robert Bosch Gmbh Controller for a heating device
AT408034B (en) * 1998-02-20 2001-08-27 Vaillant Gmbh DEVICE ON CIRCULATING WATER HEATERS, ELECTRIC WATER HEATERS AND GAS BOILERS
WO2003008876A3 (en) * 2001-07-16 2003-05-01 Int Thermal Invest Ltd Potable water heater and method of using same
GB2389187A (en) * 2002-05-09 2003-12-03 Gledhill Water Storage Monitoring and analysing the functioning of a water heating system
GB2414535B (en) * 2004-05-24 2007-11-14 Sunvic Controls Ltd Programmer
CN1945156B (en) * 2005-10-05 2010-12-08 美国热水器公司 Energy saving water heater

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4036417C1 (en) * 1990-11-15 1992-04-09 Webasto Ag Fahrzeugtechnik, 8035 Stockdorf, De Test device e.g. vehicle heater - has program memory holding test and diagnostic processes to be controlled
DE4142939C2 (en) * 1991-12-24 1997-01-23 Buderus Heiztechnik Gmbh Boiler controller
AT399955B (en) * 1993-09-16 1995-08-25 Vaillant Gmbh CONTROL CIRCUIT
DE4433541A1 (en) * 1994-08-29 1996-03-07 Landis & Gyr Business Support Central heating circuit control system
DE19716763A1 (en) * 1996-04-12 1997-12-11 Vaillant Joh Gmbh & Co Heating device with maintenance requirement indication
DE19806112B4 (en) * 1998-02-14 2004-11-18 J. Eberspächer GmbH & Co. KG Regulation of a heater with setpoint specification in the control unit including arrangement of the heater with control circuit
DE19832952A1 (en) * 1998-07-22 2000-02-10 Sieger Heizsysteme Gmbh Burner heated heating appliance as floor or wall mounted heating boiler to be serviced at timed intervals
DE29900588U1 (en) * 1999-01-15 1999-04-01 Satronic Ag Exhaust gas analyzer
DE19950651A1 (en) * 1999-05-21 2000-11-23 Electrowatt Tech Innovat Corp Analyzer, use of an analyzer and method for measuring flue gases
DE20122936U1 (en) * 2001-12-22 2010-10-28 Stiebel Eltron Gmbh & Co. Kg Heater
FR2842343B1 (en) * 2002-07-12 2007-04-27 Gerard Maumon MESSAGE BROADCAST AND INFORMATION RECORDING DEVICE FOR SENSITIVE DEVICES
AT413060B (en) * 2003-07-22 2005-10-15 Vaillant Gmbh Predictive detection of faults in electronically controlled equipment for implementation of preventative maintenance, whereby at least one condition or measurement value is monitored and compared with a permissible operating range
DE102004013971B4 (en) * 2004-03-19 2008-07-17 Rational Ag Burner device for a cooking appliance and cooking appliance with such a burner device
DE102005005679A1 (en) * 2005-02-08 2006-08-10 Robert Bosch Gmbh Electrical power supply device for gas heated throughflow water heater, has energy accumulation unit for power supply to part of control, flame sensing and ignition spark producing units, gas valve and sensor in standby mode of heater
CN109210795B (en) * 2017-06-29 2021-08-17 青岛经济技术开发区海尔热水器有限公司 Combustion curve automatic selection updating method and gas water heater

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4274145A (en) * 1979-12-31 1981-06-16 Microcomm Corporation Digital thermostat
US4298946A (en) * 1978-12-18 1981-11-03 Texas Instruments Incorporated Electronically controlled programmable digital thermostat
GB2094503A (en) * 1981-01-13 1982-09-15 Douglas Christopher Control units
GB2103386A (en) * 1981-07-20 1983-02-16 Wong Gim Electronic programmable controller device
GB2193011A (en) * 1986-07-21 1988-01-27 Schlumberger Electronics Programmable time switch
GB2212946A (en) * 1987-11-28 1989-08-02 Smith Meters Ltd Programming devices wlth multifunction controls

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4362949A (en) * 1979-01-22 1982-12-07 Vapor Corporation Load controller having time integrated demand
FR2481425A1 (en) * 1980-04-24 1981-10-30 Dietrich De Automatic control for boiler and heating system - includes microprocessor with multiplexed inputs for thermostats and control signals
FR2512179A1 (en) * 1981-08-27 1983-03-04 Sdecc FORCE DRAFT DRY GAS BOILER WITH MICROPROCESSOR CONTROL
US4593357A (en) * 1982-02-19 1986-06-03 Laboratory Equipment Corp. Motor vehicle performance monitoring system
DE3346370A1 (en) * 1983-12-22 1985-07-11 Robert Bosch Gmbh, 7000 Stuttgart Method for displaying information, preferably in a motor vehicle
DE3540599A1 (en) * 1985-11-15 1987-05-21 Porsche Ag DIAGNOSTIC SYSTEM FOR A MOTOR VEHICLE
DE3624901A1 (en) * 1986-07-23 1988-01-28 Picker Int Gmbh X-RAY SYSTEM FOR X-RAY DIAGNOSTICS AND / OR X-RAY TREATMENT
JPH0685121B2 (en) * 1987-03-31 1994-10-26 オムロン株式会社 Control device
DE3836867A1 (en) * 1987-11-06 1989-05-18 Vaillant Joh Gmbh & Co Method for testing a fuel-heated apparatus and device for carrying out the method
DE3741901C2 (en) * 1987-12-10 1996-12-05 Webasto Ag Fahrzeugtechnik Method for testing functional components in heaters and test device therefor
AU2684888A (en) * 1988-01-21 1989-07-27 Honeywell Inc. Fuel burner control system with analog sensors
CH679421A5 (en) * 1988-04-13 1992-02-14 Landis & Gyr Betriebs Ag
US4881686A (en) * 1988-10-13 1989-11-21 Hunter-Melnor, Inc. Temperature recovery display device for an electronic programmable thermostat
JP2631830B2 (en) * 1989-07-01 1997-07-16 株式会社 堀場製作所 Measuring instrument

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4298946A (en) * 1978-12-18 1981-11-03 Texas Instruments Incorporated Electronically controlled programmable digital thermostat
US4274145A (en) * 1979-12-31 1981-06-16 Microcomm Corporation Digital thermostat
GB2094503A (en) * 1981-01-13 1982-09-15 Douglas Christopher Control units
GB2103386A (en) * 1981-07-20 1983-02-16 Wong Gim Electronic programmable controller device
GB2193011A (en) * 1986-07-21 1988-01-27 Schlumberger Electronics Programmable time switch
GB2212946A (en) * 1987-11-28 1989-08-02 Smith Meters Ltd Programming devices wlth multifunction controls

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256940A (en) * 1991-06-20 1992-12-23 Drayton Controls Air conditioning controller display.
GB2256940B (en) * 1991-06-20 1994-12-21 Drayton Controls Controllers
EP0855637A1 (en) * 1997-01-23 1998-07-29 Robert Bosch Gmbh Controller for a heating device
AT408034B (en) * 1998-02-20 2001-08-27 Vaillant Gmbh DEVICE ON CIRCULATING WATER HEATERS, ELECTRIC WATER HEATERS AND GAS BOILERS
WO2003008876A3 (en) * 2001-07-16 2003-05-01 Int Thermal Invest Ltd Potable water heater and method of using same
US7036746B2 (en) 2001-07-16 2006-05-02 International Thermal Investments Ltd. Potable water heater and method of using same
GB2389187A (en) * 2002-05-09 2003-12-03 Gledhill Water Storage Monitoring and analysing the functioning of a water heating system
GB2389187B (en) * 2002-05-09 2006-01-11 Gledhill Water Storage Network control systems
GB2414535B (en) * 2004-05-24 2007-11-14 Sunvic Controls Ltd Programmer
CN1945156B (en) * 2005-10-05 2010-12-08 美国热水器公司 Energy saving water heater

Also Published As

Publication number Publication date
CH683457A5 (en) 1994-03-15
IT1245109B (en) 1994-09-13
FR2657418A1 (en) 1991-07-26
FR2657418B1 (en) 1998-07-17
GB9101562D0 (en) 1991-03-06
DE9100806U1 (en) 1991-04-11
DE4102050A1 (en) 1991-08-01
ATA16490A (en) 1995-05-15
ITMI910162A1 (en) 1992-07-24
NL9100098A (en) 1991-08-16
GB2240640B (en) 1994-05-25
AT400484B (en) 1996-01-25
ITMI910162A0 (en) 1991-01-24
BE1005233A6 (en) 1993-06-01

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