EP0292547A1 - Regler für heizungsgerät mit zwei betriebsarten - Google Patents

Regler für heizungsgerät mit zwei betriebsarten

Info

Publication number
EP0292547A1
EP0292547A1 EP88900232A EP88900232A EP0292547A1 EP 0292547 A1 EP0292547 A1 EP 0292547A1 EP 88900232 A EP88900232 A EP 88900232A EP 88900232 A EP88900232 A EP 88900232A EP 0292547 A1 EP0292547 A1 EP 0292547A1
Authority
EP
European Patent Office
Prior art keywords
heating
thermostat
control device
supplied
convector
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.)
Withdrawn
Application number
EP88900232A
Other languages
English (en)
French (fr)
Inventor
Jean Hennuy
Guy Wojcik
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.)
SEB SA
Original Assignee
SEB SA
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 SEB SA filed Critical SEB SA
Publication of EP0292547A1 publication Critical patent/EP0292547A1/de
Withdrawn legal-status Critical Current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
    • F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
    • F24H9/2071—Arrangement or mounting of control or safety devices for air heaters using electrical energy supply
    • 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
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/156—Reducing the quantity of energy consumed; Increasing efficiency
    • 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
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/176—Improving or maintaining comfort of users
    • 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
    • F24H15/254—Room temperature
    • 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
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/37—Control of heat-generating means in heaters of electric heaters
    • 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
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0411—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between for domestic or space-heating systems
    • F24H3/0417—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between for domestic or space-heating systems portable or mobile
    • 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
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1912—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can take more than two discrete values
    • 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
    • G05D23/275—Control of temperature characterised by the use of electric means with sensing element expanding, contracting, or fusing in response to changes of temperature

Definitions

  • the present invention relates to a control device for a heating appliance such as a convector with electrical heating resistors comprising two operating modes, the first being with natural convection and the second of the blowing type being obtained using a member. blowing.
  • This type of convector is mainly intended for space heating. It generally has two operating powers, the convector being first used at full power, in blowing mode, to allow a rapid rise in temperature of the room, without cutting the power supply, then when the set temperature is reached , at reduced power and without blowing, in natural convection regime, the temperature of the room then being regulated for example by means of an "all or nothing" thermostat, electronic or similar.
  • the dimensions of the convector of the aforementioned type must be such that under all operating conditions, the temperature of its various parts accessible to the user does not exceed the maximum authorized values or those imposed by the manufacturer on the basis of criteria. even more severe quality.
  • Electric convectors with two operating modes are known, one of which is with forced convection in which, for this latter regime, the air is sucked outside the convector, passes through the heating resistor and is then blown outside. in the room to be heated.
  • the hot air outlet is effected by one or more outlet grilles, the arrangement of which at the top of the convector is essentially adapted to operation in the natural convection regime.
  • investigations carried out by the plaintiff have shown that, psychologically, the user prefers that in a blowing regime, that is to say in this case in a forced convection regime, the hot air comes out in front of the convector and at the lower part of it.
  • an electric convector comprising an enclosure forming a convection chimney which has a lower air outlet opening and an upper air outlet opening. air.
  • the resistor is placed inside the enclosure downstream of the lower air inlet opening.
  • a turbine is arranged inside the enclosure to extract part of the hot air formed by natural convection in the convection chimney and to blow part of this air through an additional outlet opening. hot air provided in the front wall of the enclosure.
  • the object of the present invention is to propose a control device for heating devices of the aforementioned type which allows automatic regulation of the operating modes of these devices and which is of simple design.
  • the control device for the aforementioned device in which a thermostat is interconnected between the power source and the heating resistor which comprises two heating elements, one of which is supplied only during one of the regimes of this apparatus, is characterized in that a temperature limiter is interconnected between the source and said heating element supplied only during one of the regimes of the apparatus, temperature limiter being sensitive to the heating of a resistance of high ohmic value to cut the power supply of this heating element during the first opening of the thermostat switch.
  • this device. control is characterized in that a resettable relay is interconnected between the thermostat and said heating element supplied only during one of the modes, the coil of this relay being mounted in parallel on this element so that the relay opens for cut off the supply of said element when the thermostat switch is opened for the first time.
  • a thermostat and temperature limiters or a relay allows the automatic transition from the fan mode to the natural convection mode and regulation by "all or nothing" in this latter operating mode.
  • the blowing member is supplied in parallel with the heating element which is supplied only in blowing mode from the heating appliance.
  • FIG. 1 is a perspective view of a convector according to the invention
  • FIGS. 2 and 3 are perspective views, partially broken away, of this convector showing the two operating modes
  • - Figure 4 is a schematic view in longitudinal section, showing the interior of the convector and the paths of the air in the blowing regime
  • FIGS. 5 and 6 are schematic side views with cutaway of the respective end walls of the convector
  • FIG. 7 is an electrical diagram of a control device according to the invention.
  • FIG. 8 is an electrical diagram of a control device according to an alternative embodiment of the invention.
  • the electric convector comprises an enclosure 1 made of sheet metal forming a convection chimney, which has a lower opening 2 for air inlet and an upper opening 3 for air outlet.
  • the electrical resistance 4 is disposed (see FIG. 4) inside the enclosure 1, just above the lower air inlet opening 2.
  • this resistor 4 comprises two heating elements 41, 42 which can be supplied separately as we will see later.
  • the interior of this enclosure 1 also contains a turbine 5 driven in rotation by a motor 6 to extract, in blowing regime, part of the hot air formed by natural convection in the convection chimney and blow this air through an opening 7 (see Figures 1 and 4), additional hot air outlet, provided in enclosure 1.
  • a turbine 5 driven in rotation by a motor 6 to extract, in blowing regime, part of the hot air formed by natural convection in the convection chimney and blow this air through an opening 7 (see Figures 1 and 4), additional hot air outlet, provided in enclosure 1.
  • blowing turbine 5 is rotatably mounted in a compartment 8 formed on one of the sides of the enclosure 1, which comprises in the axis of the turbine 5 an opening 9 communicating with inside the enclosure 1, while the opening 7 for blowing additional air is provided on one face of this compartment 8 located opposite the turbine 5 in the lower part thereof. Furthermore, the turbine 5 is mounted in a casing 11 in the form of a scroll, the air outlet 12 of which is directed towards the bottom 13 of the compartment 8 and towards the front thereof which includes the opening 7 (see FIG. 5 ). In the embodiment shown in Figures 3 and
  • the compartment 8 has, near its bottom 13, a second opening 14 communicating with the interior of the enclosure 1 opposite the heating resistor 4. As will emerge in more detail from the description of the operation, this opening 14 is used, in blowing mode, to reinject part of the air diverted into the compartment 8 by the turbine 5, in the enclosure 1 on the heating elements 41, 42.
  • the opening 14 has a section less than that of the additional air outlet opening 7.
  • the control device 25 comprises a thermostat 15 for adjusting the set temperature.
  • the thermostat 15 is placed (FIG. 4) in the compartment 8 in a region not affected by the flow of hot air blown by the turbine 5, for example behind the volute 11.
  • One of the terminals A of the switch 15a of the thermostat 15 is connected to the electrical power source S of the convector while its other terminal B is connected to one of the terminals of the heating element 41 intended to be supplied both in natural convection regime and in blowing regime.
  • the other terminal of the heating element 41 is connected to the source S.
  • a temperature limiter 18 for example a thermal switch, is interconnected between the source S and one of the terminals D of the heating element 42 intended to be supplied only in blowing mode.
  • the limiter 18 is designed and arranged in the circuit of the control device 25 to be sensitive to the heating of a resistance of high ohmic value or "heater" 17, for example of a value between 16 and 20 k ⁇ , for open when this heater is supplied and thereby cut the normal supply to the heating element 42.
  • the heater 17 is mounted in series with a second temperature limiter 16 between the terminal D of the limiter 18 connected to the heating element 42 and the terminal B of the switch 15a.
  • This temperature limiter 16 is also designed and placed in the circuit of the device 25 to be sensitive to the heating of the heater 17 and to open when this heater is supplied. Preferably, it will be ensured that the limiter 16 opens substantially at the same time as the limiter 18.
  • the motor 6 of the turbine 5 is mounted in parallel on the heating element 42, between the terminal D and the source S.
  • a switch 21 interconnected between source S and terminal A allows the convector to be turned on or off.
  • the heating element 41 preferably has a power of 1000 W while the element 42 has a power of 500 W or 1000 W in order to obtain in fan mode a total power of 1500 or 2000 W.
  • the control device 25 is preferably placed in the compartment 8 opposite the external control members 10 of the convector.
  • the thermostat 15 having been adjusted to its set temperature, for example 20 ° C., and the convector connected to the source S, the switch 21 is then placed in the closed position while the switch 15a of the thermostat 15 is also closed.
  • the temperature limiters 16, 18 are closed because they are not subjected to any heating, the heater 17 being shunted by the circuit portions AB and AD.
  • the connection points A and C are energized and the heating elements 41 and 42 as well as the motor 6 of the turbine 5 are supplied.
  • the flow R represents ten to twenty percent of flow A, while flow C leaving enclosure 1 through the opening 3 is fifteen to twenty five percent higher than the one who would leave this opening 3 in the absence of the opening 14.
  • the difference of five percent with the A / R ratio is justified a priori by the amplification of the speed of the air circulating in the convection chimney due to a reduction in overall pressure losses. Thanks to a relative cooling of the heating elements 41 and 42 and to an efficient mixing of the air circulating in the convection chimney by the flow R, the average temperature of the flow C is reduced so that the walls of the cell are correlatively cooled. enclosure 1 and the grids which partially block the air outlet 3. Furthermore, the flow of hot air S blown through outlet 7 very clearly improves the heating comfort, most users highly appreciating a blowing of hot air at the bottom and on the front of the convector.
  • the switch 15a of the thermostat 15 opens the circuit ABC. Given the high ohmic resistance of the heater 17, there then flows a low current in the circuit connecting in series the source S, the heater 17 and the element 41. This low current heats the heater 17 sufficiently to open the limiters 16 and 18. Thus, the elements 41 and 42 no longer give off heat and the turbine 5 no longer works.
  • the switch 15a of the thermostat 15 closes again, so that the element 41 is again supplied at its maximum intensity and resumes heating.
  • the limiters 16 and 18 being always in the open position, the element 42 does not give off any heat and the turbine 5 still does not work.
  • control device 25 ensures, in natural convection regime, regulation in "all or nothing".
  • the limiters 16 and 18 can be closed so that the convector operates again according to the cycle described above which starts with the blowing regime.
  • FIG. 8 which illustrates a variant of embodiment of the control device 25, the terminals of the circuit of this device 25 are identified by the same letters as in FIG. 7.
  • a relay 20 resettable by a reset button 30 is interconnected between the terminals B and D of the circuit of the device 25. Maintaining the relay 20 in the closed position after the button 30 has been engaged is supplied by the coil 22 of this relay which is mounted in parallel on terminals D and C.
  • the operation is as follows: the thermostat 15 having been adjusted to its set temperature and the convector connected to the source S, the switch 21 and the relay 20 are then placed in the closed position while the switch 15a of the thermostat 15 is also closed.
  • the connection points A, B, C and D are energized and the heating elements 41 and 42 as well as the motor 6 of the turbine 5 are supplied.
  • the convector then operates in blowing mode.
  • the thermostatic switch 15a opens the circuit ABC so that the coil 22 is no longer supplied.
  • the contact 31 of the relay 20 then opens and therefore the elements 41 and 42 no longer heat up and the turbine 5 no longer works,
  • the switch 15a closes again, so that the element 41 starts to heat again. Since the coil 22 is still not supplied, the relay 20 remains closed so that the element 42 does not heat up and the turbine 5 does not work either.
  • the convector operates again according to the cycle described above, which starts with the fan speed.
  • the control device 25 which has just been described thus ensures, thanks to a particularly simple design, the automatic transition from the fan regime to the natural convection regime regulated in all or nothing.
  • control device that has just been described is applicable to any electric heater with two heating regimes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)
  • Wind Motors (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Central Heating Systems (AREA)
EP88900232A 1986-12-10 1987-12-09 Regler für heizungsgerät mit zwei betriebsarten Withdrawn EP0292547A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8617280 1986-12-10
FR8617280A FR2608259B1 (fr) 1986-12-10 1986-12-10 Convecteur electrique de chauffage a double regime

Publications (1)

Publication Number Publication Date
EP0292547A1 true EP0292547A1 (de) 1988-11-30

Family

ID=9341754

Family Applications (2)

Application Number Title Priority Date Filing Date
EP88900232A Withdrawn EP0292547A1 (de) 1986-12-10 1987-12-09 Regler für heizungsgerät mit zwei betriebsarten
EP88900027A Withdrawn EP0292531A1 (de) 1986-12-10 1987-12-09 Elektrischer konvektionsheizer mit zwei arbeitsgängen

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP88900027A Withdrawn EP0292531A1 (de) 1986-12-10 1987-12-09 Elektrischer konvektionsheizer mit zwei arbeitsgängen

Country Status (7)

Country Link
US (2) US4912300A (de)
EP (2) EP0292547A1 (de)
ES (2) ES2005970A6 (de)
FR (1) FR2608259B1 (de)
GR (2) GR871870B (de)
PT (2) PT86326A (de)
WO (2) WO1988004393A2 (de)

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US6093916A (en) * 1997-10-06 2000-07-25 Canon Kabushiki Kaisha Control device with first and second power control elements to control heater drive apparatus
US6003242A (en) * 1998-01-09 1999-12-21 Carley; Joseph C. Portable heater
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CA2393882C (en) * 2001-07-19 2006-10-17 Bradley J. Wilson Electric heater with dual overheat limits
DE10260019B4 (de) * 2002-12-19 2005-11-24 Miele & Cie. Kg Haushalts-Speisenwärmer zum Warmhalten von Speisen und Getränken
US20060263073A1 (en) * 2005-05-23 2006-11-23 Jcs/Thg,Llp. Multi-power multi-stage electric heater
US8693855B2 (en) * 2009-05-07 2014-04-08 Cambridge Engineering, Inc Infra-red heater assembly
US9204494B2 (en) * 2012-12-03 2015-12-01 General Electric Company Hybrid heater assembly with heating elements having different wattage densities
US11175051B2 (en) * 2013-12-06 2021-11-16 Richard C. Markow Heating system, kit and method of using
US9976774B1 (en) * 2013-12-06 2018-05-22 Richard C. Markow Heating system, kit and method of using
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CN106017134A (zh) * 2016-06-27 2016-10-12 珠海格力电器股份有限公司 散热装置及控制方法

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Also Published As

Publication number Publication date
GR871869B (en) 1988-03-31
PT86326A (pt) 1989-01-17
ES2005971A6 (es) 1989-04-01
WO1988004448A1 (fr) 1988-06-16
EP0292531A1 (de) 1988-11-30
ES2005970A6 (es) 1989-04-01
FR2608259B1 (fr) 1989-03-31
PT86327A (pt) 1989-01-17
US4888469A (en) 1989-12-19
WO1988004393A3 (fr) 1988-07-14
WO1988004393A2 (fr) 1988-06-16
US4912300A (en) 1990-03-27
GR871870B (en) 1988-04-01
FR2608259A1 (fr) 1988-06-17

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