EP1110429A1 - Elektrische heizvorrichtung und verfahren zum betreiben einer heizvorrichtung - Google Patents
Elektrische heizvorrichtung und verfahren zum betreiben einer heizvorrichtungInfo
- Publication number
- EP1110429A1 EP1110429A1 EP99946054A EP99946054A EP1110429A1 EP 1110429 A1 EP1110429 A1 EP 1110429A1 EP 99946054 A EP99946054 A EP 99946054A EP 99946054 A EP99946054 A EP 99946054A EP 1110429 A1 EP1110429 A1 EP 1110429A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating
- temperature
- heating device
- fluid
- designed
- 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
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/0297—Heating of fluids for non specified applications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/46—Heating elements having the shape of rods or tubes non-flexible heating conductor mounted on insulating base
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/022—Heaters specially adapted for heating gaseous material
Definitions
- the present invention relates to an electrical heating device according to the preamble of claim 1 and a method for operating a heating device.
- a generic device in the form of an electric heater is known from EP 0 123 698 B1 by the applicant.
- this device had a radiator composed of a plurality of radiator elements with a circular cross section, which offers a continuous, cylindrical outer surface, while in the interior of the cylindrical body there are provided axial flow channels for an air flow and spiral elements made of heating wire material crossing these flow channels.
- this device from the prior art was already able to implement a compact arrangement which has advantageous properties with regard to fluid heating and flow properties for the fluid.
- the multi-stage, piece-wise construction of a heating coil has proven to be complex in terms of production technology and problematic in terms of control and heating behavior. This is because the thermal bridges between the successive, annular spiral segments in particular arise, and moreover the voltage drop along the chain of the successive spiral segments is problematic.
- this publication describes the radiator as a cylindrical body with an essentially homogeneous outer surface, but in particular the heat-insulated assembly of this body. Pers, for example, in a plastic housing of a hot air blower is difficult and requires a lot of manual work.
- the object is achieved by the heating device with the features of claim 1 and the method with the features of claim 8.
- the electronic storage device makes it possible to directly record specifically measured, individual parameters for the preferably modular heating device and to make it available for later electronic operation control in the device, for example a hot air blower.
- an individual temperature sensor measured value according to the test measurement of the heating module in question is stored in the memory, so that control electronics to be connected to the heating module can then control the device completely and to the power limit, taking into account this individual value, without causing it leads to adverse effects on the life of the heating coil due to overload.
- the memory module advantageously offers the possibility of specifying further, for example country or supply network-specific parameters, So that upstream, universally oriented control electronics then uses these values to offer the user a device that is individually tailored to his needs and the respective local conditions, such as the network frequencies of a specific country, without an end user himself having to laborious and / or or make error-prone settings.
- control electronics that can be connected according to the invention such that they enable the user to specify a target temperature to be selected for the fluid to be heated, the device according to the invention then regulating the temperature sensor by the temperature sensor provided on the output side according to the invention Activation until this preset temperature is reached.
- the memory module according to the invention is designed to be writable for storing an electronic identifier for a network frequency with which the heating device is to be operated and / or for a temperature display format (degrees Celsius, degrees Fahrenheit) for processing by the control electronics.
- the special design of the web-shaped sections enables simultaneous guiding and holding of a continuously spiral, coiled heating element, which in this way can be easily installed and evenly heated, and the fluid can flow around it.
- a configuration is advantageous and increases the service life and operational reliability of a device realized with the heating device according to the invention compared to the prior art.
- the proven, constructive realization of the flow channels between adjacent, radially extending struts of a ceramic body remains between an outer ring section and an inner middle section, which, ter preferred, additional channels for supply lines or the like. can have obtained.
- the spiral heating coil is designed to be continuous and i.w. Extends over the entire length of the flow channel, or the spiral heating coil is designed in several parts and separately controllable in the axial direction.
- heating coils with different outside diameters which are arranged along the same axis, through the heating device according to the invention, in which case the web-shaped sections each have two adjacent recesses for an inside or outside coil .
- Such a heating coil arrangement which leads to the desired increase in the heating output, can also be adjusted in terms of its power by separate, individual control of the individual coils, both the designs described having two single coils extending over the entire channel length of the flow channel having proven their worth, and also , arranged in the flow direction successively, double helix pieces, which are controlled separately.
- the cylindrical outer surface also has a raised edge at the end, realized by corresponding ring shoulders on end pieces of the carrier elements. This creates a particularly simple and inexpensive to manufacture with an insulator film or the like. Material wrapped receptacle, which then ensures good thermal insulation of the arrangement thus created in a surrounding device housing.
- control electronics connected to the heating coil or the temperature sensor ensure that power regulation is regulated to a predetermined electrical power value, in particular the power maximum or an electrical power value slightly below the power maximum.
- control means are implemented which automatically influence (increase) the speed of the fan motor provided in the context of the invention in such a way that the heater absorbs the predetermined power value, for example 5/6 of the maximum power.
- Such an embodiment is particularly advantageous when attachment nozzles with a small opening diameter are used in connection with the present electrical heating device at the outlet end of the flow channel, since the amount of heating energy emitted by the device drops in particular through an attachment nozzle with a very small diameter and through the readjustment according to the further development the fan speed, depending on the heating power consumed, could be compensated.
- FIG. 1 a perspective view of a radiator according to a first embodiment of the invention with a plurality of disk-shaped radiator elements in the assembled state (best ode);
- FIG. 2 shows a perspective view of a single-pass, stepless heating insert 1 which can be used for use in the arrangement according to FIG. 1;
- FIG. 4 shows a longitudinal section through a center piece of the arrangement according to FIG. 1 corresponding to a sectional view according to the section line IV-IV in FIG. 6;
- FIG. 5 shows a longitudinal section through an outlet-side end piece of the arrangement according to FIG. 1;
- Fig. 6 a plan view of a disc-shaped
- FIG. 12 an alternative embodiment to the coil arrangement of FIG. 11 with a front (downstream) and a rear (upstream, in each case related to a blower) heating coil arrangement comprising an internal and external, parallel-connected heating coil;
- FIGS. 11 and 12 a perspective view of the heating device according to the second embodiment for receiving the heating coil arrangement according to FIGS. 11 and 12;
- FIG. 14 a plan view of a disk-shaped heating element of the arrangement according to FIG. 13;
- the heating device of the first embodiment according to FIG. 1 consists of a plurality of disk-shaped radiator elements 10 (nine elements in the exemplary embodiment of FIG. 1) which are lined up in a cylinder-like manner, each of which, as shown in FIG. 6, has an annular outer region (outer ring) 12, a disk-shaped one Inner area 14 and a plurality of radially extending struts 16 connecting the outer ring 12 and the inner area 14.
- a single radiator element 10, as shown in the sectional view of FIG. 4, has an outer diameter of approximately 35 mm and is approximately 9 mm deep.
- a marking groove 31 is provided on the jacket side, which, when the individual elements 10 are correctly seated together, complements the continuous line pattern shown in FIG. 1.
- the inner region 14 has a plurality i.w. circular openings 18 which, in the arrangement of FIG. 1, can be aligned in alignment with one another and thus form through the heating element arrangement of FIG. 1 longitudinally extending, continuous channels.
- the radiator elements 10 which are preferably made of ceramic material, have a square-shaped opening 19 in the center of the inner region 14, through which a square-shaped clamping element 20, which is only indicated schematically in FIG. 1, can be guided and thus for a firm, non-rotatable hold the plurality of elements 10 provides.
- each radiator element 10 four conical projections in the form of centering tips 22 are arranged around the center, which engage in respectively assigned center holes of an element adjacent in the arrangement of FIG. 1 and thus ensure an exact positioning of the individual elements relative to one another.
- End pieces are provided on both sides of the majority of the radiator elements 10 in FIG. 1, namely an inlet-side (blower-side) end piece 24, which sits adjacent to a blower motor for conveying a fluid (preferably air) through the radiator arrangement, and at the opposite end exit-side end piece 26. Both end pieces 24, 26 limit the radiator arrangement of FIG. 1 in this way, whereby, as can be seen from the comparison of the longitudinal sections through the individual elements 10, 24, 26 of FIGS.
- both the entry-side end piece 24 and the outlet-side end piece 26 each have a ring shoulder towards their respective outer end face.
- a ring shoulder 28 of the outlet-side end piece 26 forms a slightly smaller outer diameter than a ring shoulder 30 of the inlet-side end piece 24.
- the ring shoulders 28, 30 result in a jacket section delimited on both sides by an edge and formed by the outer surfaces of the respective radiator elements 10, which is designed and provided for wrapping with an insulating film. More precisely, this arrangement makes it possible to apply insulating film in a compact, precise and mechanically reliable manner to the radiator arrangement of FIG. 1 without having to take any special precautions for guiding or fastening the insulating film.
- catchy and stepless heating coil 32 runs inside the radiator arrangement of FIG. 1, namely the coiled sections of the heating coil 32 are guided through recesses or openings formed in a suitable place in the struts 16 of the radiator elements 10.
- This mechanism results from the sequence of the partial sectional views according to FIGS. 7 to 10, which show the course of a recess 34 formed in the respective strut 16.
- FIGS. 7 to 10 which show the course over a circumferential angle of approximately 120 ° of the radiator element 10 of FIG.
- each disk-shaped radiator element 10 thus forms a support for a full rotation of the coil 32, so that a correspondingly long coil can be held and guided by placing a plurality of radiator elements 10 together.
- both an outlet-side supply line 36 and an inlet-side supply line 38 can be guided through corresponding openings 18 of the heating element 10 along the direction of extension of the heating element arrangement of FIG. 1 to the connection end, the openings 18, as in FIG 6, suitable for this purpose also have openings in the radial direction.
- radiator elements 10 with the openings in the interior of the respective individual elements provides channels for additional lines, for example for a thermocouple which can be provided on the outlet-side end piece 26, the feed lines of which can then be connected in a corresponding manner at the inlet-side end to the associated evaluation electronics.
- additional lines for example for a thermocouple which can be provided on the outlet-side end piece 26, the feed lines of which can then be connected in a corresponding manner at the inlet-side end to the associated evaluation electronics.
- the spiral shown in FIG. 2 runs in the region of the struts 16 between the outer ring 12 and the inner region 14 of a respective radiator element.
- the outlet end of the arrangement - since heated air is already flowing there - to have a lower winding or To provide the helix density of the helix than on the entry side, and, more preferably, this variation can also take place continuously along the helix extension.
- FIGS. 11 to 19 A second embodiment of the present invention is described below with reference to FIGS. 11 to 19, which is regarded as the best embodiment (best mode) in this respect.
- the second embodiment shown assembled in the perspective view in FIG. 13 consists of a series of individual radiator elements 44 which are aligned with one another by means of a marking line 46 and on both ends of a connection-side end piece 48 or an outlet-side end piece 50 can be limited. Again, both end pieces 48, 50 form an edge for an intermediate, continuous outer surface, which is described in the above
- FIG. 13 differs geometrically from the device according to FIG. 1 by a somewhat larger outer diameter of the central radiator elements 44, namely approximately 45 mm in the exemplary embodiment described, and by a somewhat different arrangement of openings located in the inner region 52 of a respective individual element 54 for the leads to the heating elements. More specifically, as shown in FIGS. 11 and 12, this embodiment provides that one (FIG. 11) or two (alternative embodiment FIG. 12) double helix (s) for heating the air flow between the inner region and the outer ring section of the respective radiator elements 44.
- struts 58 which connect the ring section 56 to the inner region 52, can be in the region of the struts 58 connect, two helices with different helix diameters are guided, and the struts 58 for this purpose have correspondingly helically extending or circumferentially stepped recesses 60.
- the slope of an inside spiral 59, recognizable by inner recesses 60 a is also less than the slope of an outer spiral 61, guided in associated, outer recesses 60 b in the respective struts 58.
- the spirals can be guided continuously and continuously; in the case of the embodiment of FIG. 12, however, in two sections, which are divided into a front, outlet-side double helix section 62 and a rear, fan-side (inlet-side) double helix section 64 and each consist of a parallel connection of the inner and outer helix. The fluid is in turn supplied from the direction of the connections or feed lines to the coils.
- FIG. 15 illustrates, the number of supply lines is higher due to the double spiral heating, and the number of openings 54 provided in the inner region 52 increases accordingly.
- FIGS. 14 and 15 analogous to the centering cone of FIG. 6, an alignment of adjacent radiator elements 44 with respect to one another to the arrangement of FIG. 13 takes place by means of truncated cones 66, which are distributed around the circumference, are provided on the ring section 56 and, in the non-radially symmetrical arrangement shown, define a clear fixation of the individual elements to one another in the circumferential direction.
- the arrangement of the radiator elements shown either takes up the one-piece double helix of FIG. 11, or else the divided double helix of FIG. 12, two power levels in each case being able to be activated by appropriate connection or control of these coil arrangements:
- a first (low) heating level would provide for the activation of only the inner heating coil 59, and the parallel connection of both heating coils 59, 61 would then be activated on a second, higher heating level.
- both the rear and the front double spiral sections 64, 62 in FIG. 12 each already consist of a parallel connection of the corresponding resistance heating elements, and accordingly a first heating stage would provide for activation of one of the two double spiral sections, and then at full load in a second To activate the heating level of each other additionally.
- connection head On the inlet side (ie directed towards the fan motor), the above-described embodiments have a connection head (not shown in the figures) which, in addition to suitable plug pins for connecting the respective radiator to the associated electronics, has an EEPROM as with the electrical and test data of a respective device described storage element carries. More specifically, this electronic memory module stores individual data regarding the type of heating (one-stage / two-stage, one coil or two coils), temperature parameters (e.g. display in degrees Celsius or degrees Fahrenheit), further adjustment values (specific temperature behavior) and production data.
- a thermostat At the end opposite this connection head, a thermostat (not shown in the figures) is located on the outlet side. Moelement, whose temperature information can then also be tapped via the connection head.
- the electronics 68 also including the fan motor 72 in the form of a brushless DC motor (which conducts air through the arrangements described in the assembled state) , furthermore a motor control unit 74 for the electronic control of the motor 72 and for detecting an actual speed of the motor n ist , which has corresponding semiconductor components, a switching power supply and a control ASIC for the motor and in the manner to be described below by one central, processor-controlled control loop is controlled.
- a heating control unit 76 has triacs for switching the heating coil and optocouplers for zero-crossing detection in order to be able to determine the switch-on time with sufficient accuracy.
- control unit 76 interacts with the first heating section 78 and a second heating section 80 (in the case of the exemplary embodiment in FIG. 1, the second heating section is omitted; in the case of FIG. 12 for the second exemplary embodiment, the heating sections mean the inner or outer heating coil 59, 61, and in the case of FIG. 12 the front or rear double spiral section 62, 64).
- the heating module 70 is dimensioned such that the The surface temperature of the heating wire for the filaments is close to its melting point, so that in order to maintain an operating life that is to be guaranteed, it is necessary for each individually manufactured heating arrangement to be measured at the hottest point by a test device, the specific properties recorded in this way the heater can be made accessible for electronic control or for the parameterization of the operating process.
- the aforementioned EEPROM, reference number 82 in the block diagram of FIG. 20, is provided directly on the heating module and contains the respective product-specific data as follows:
- thermocouple voltage of a thermocouple 84 also provided on the heating module and implemented as a Cr-Ni-Cr thermocouple is stored at a temperature of, for example, 600 ° C. (maximum, desired operating temperature) at the hottest point in each case .
- the following technical information is stored in the memory module: An expert for the supply network or the network frequency of an intended operating country, since, as will be explained below, the control for the motor unit when operating on a 50 Hz network compared changed in a 60 Hz network.
- the memory module 82 also contains a reference temperature value for temperature compensation by means of a compensation sations-measuring element 86 (the thermocouple 84 generates a measured value relative to a comparison point as thermal voltage. However, since this reference point is heated when the device is in operation, the temperature of this comparison point can be measured using the compensation measuring element 86, for example an NTC to compensate for the error that arises).
- Further parameters that are individually assigned to a heating module are information about a type of heating (one or two heating lines), duration of a display of a temperature setpoint to be set by a user (instead of a permanently displayed actual temperature value), an automatic speed reduction at high temperature values and other parameters - tus information.
- the specifically programmed memory module 82 provides all the heating and temperature-relevant parameters in order to offer the connected electronics 68 the basis for a motor and heating control that makes maximum use of the load capacity of the heating coils and nevertheless does not cause the material to be worn unintentionally.
- the most important information in this memory module individually created for each heating module is the specifically measured thermocouple voltage of the Ni-CrNi element 84 at maximum operating temperature.
- the heating unit 70 is controlled by a central control unit provided in the electronics module 68 in accordance with the specifications of the user or the parameters stored in the memory module 82, the control unit, indicated in FIG. 20 by the dashed line 88, having the following functional components ( these can be realized either by dedicated hardware circuits, as is immediately clear to the person skilled in the art, or they can be functionalities of a microcontroller provided with appropriate software or the like processor element).
- a calibration and test module 89 receives the parameter data of the EEPROM 82 from the heating module and also loads further parameters and specifications read from a separate EEPROM 90. After carrying out an adjustment and plausibility check after the start of operation of the hot air device shown in FIG.
- a current thermal voltage emitted by the thermocouple 84 is amplified via an amplifier unit 94 and fed to an A / C converter 96 as the actual temperature T 1 .
- the A / C converter of the central control unit 88 also receives an externally specified by the operator temperature setpoint T set and a rotational speed n -Sollwert ⁇ oll.
- a compensation temperature T comp of the compensation measuring element 86 is read in.
- the AD receives transducer 96 nor n is the current engine speed iBt the motor control unit 74, wherein by means of an error detection unit 98, which is followed by 100 of a motor control unit, a monitoring of the actual engine speed n is ⁇ st performed.
- the central control unit 88 switches off the heating lines 78 and, if applicable, 80 and outputs them on the display unit 92 a corresponding error or service message.
- a temperature control unit 102 shown in the bidirectional data exchange with the motor control unit 100 is implemented as a digital PI controller.
- An interaction between the engine control 100 and the temperature control 102 takes place through mutual influence, for example, as an increase in the engine speed causes a change in the control behavior for the temperature, and an increase in the temperature causes a reduction in the engine speed, since the air flow rate of the fan motor is so great is that the temperature control would not be able to set the required temperature without automatically lowering the engine speed at high set temperatures.
- the user can accordingly preselect a desired temperature value of the hot air escaping from the device by specifying a target temperature, which is displayed on the display unit 92 in the form of a digital, multi-digit (for example 7-segment display) display, and it is then by the central control unit 88 in accordance with the currently recorded actual temperature value T , the control output for the heating is increased until the predetermined target value is reached.
- the temperature is then kept at the desired level by means of a control loop.
- the display module 92 makes it possible to display the setpoint set by the operator for a predetermined time since the actuation of an actuating element, until switching back to a display mode for an actual actual temperature T ist .
- a single-stranded heating module (exemplary embodiment of FIG. 1) to implement a hot air device with a power of approximately 1,700 watts, while a double-stranded device (FIG. 13) with a heating power of approximately 3,400 watts, as above described, compact dimensions and long service life in continuous operation.
- the single-strand or double-strand heating coils are activated while minimizing any network disturbances and network perturbations.
- the entire load for each heating circuit is switched in each case during complete half-waves of the supply voltage, it being possible, depending on a respective switching pattern, to perform a gradual power setting by controlling this switching pattern which indicates the switched on or off half-periods.
- T kx 3,000 / [mains frequency in Hz]
- k an integer
- natural number> 2
- the switching pattern remains constant within each period T.
- T 60 ms or an integer multiple thereof
- the respective half-waves are switched in one or two lines so that the total switched DC power component within one period Remains zero. While this results in four feasible switching levels (0, 1/3, 2/3, full) for only one heating line, a total of seven power levels result from heating with two independently switched lines (but during the same period T) by varying the switching mode. sters for whole, switched half-waves.
- a control is provided which, in particular when using an attachment nozzle with a small diameter before the fluid outlet, ensures that the nozzle does not reduce the amount of heating energy given off, which reduces the outlet cross section.
- the (heat) amount of energy that can be transported onto a workpiece by the present electrical heating device depends on the electrical power supplied and on the dynamic pressure generated by the fan wheel in the heating element. is gig; the dynamic pressure is a measure of how much fluid (air) can be transported by the fan wheel at a predetermined outlet cross section. As the speed of the fan wheel drops, the dynamic pressure inside the heating element drops (in practical implementation almost proportionally) and thus the amount of heat energy that can be transferred to the workpiece at a constant temperature. If a user now uses an attachment nozzle with a very small diameter (i.e.
- the amount of energy emitted by the device drops again, since the reduction in cross-section of the nozzle while the internal pressure is kept constant reduces the amount of air conveyed and the regulator reduces the power consumption of the heating coil , because he can now set the required temperature with a smaller electrical output.
- the subject of the further development described by means of the fan wheel control concept is now to automatically increase the fan speed to such an extent that the heating on average, e.g. 5/6 of the maximum electrical heating power.
- the control circuit in the central control unit automatically adjusts the speed to the maximum possible product of air volume and electrical heating output up or regulated.
- the central control unit micro-controller
- the central control unit would lower the engine speed to a fixed, preset value that would contribute to the maximum possible speed value during normal operation of the heating device according to the invention the required temperature, the electrical power consumed would be here when using a small attachment nozzle decrease because the amount of air conveyed drops and thus the temperature control reduces the electrical output of the heating.
- the speed control provided in accordance with the further training would work in the same way with the same settings in normal operation (ie without attachment), however, when using an attachment nozzle with a small cross-section, this would result in the control unit increasing the turbine speed until about 5/6 (example value) total heating power is reached on average, or the target speed is equal to the actual speed.
- the control circuit variants described together with one of the above-described exemplary embodiments for the heating module make it possible to create a heating device for a fluid, in particular a hot air blower, which, in an extremely powerful yet compact design, has high heating outputs with precise temperature control, which is extremely user-friendly Combines with a set temperature to be set by the user.
- heating module-specific parameters and temperature data allow maximum control outputs without endangering the service life of the highly stressed heating elements.
Landscapes
- General Induction Heating (AREA)
- Direct Air Heating By Heater Or Combustion Gas (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19839044 | 1998-08-28 | ||
DE19839044A DE19839044A1 (de) | 1998-08-28 | 1998-08-28 | Elektrische Heizvorrichtung und Verfahren zum Betreiben einer Heizvorrichtung |
PCT/EP1999/006335 WO2000013467A1 (de) | 1998-08-28 | 1999-08-27 | Elektrische heizvorrichtung und verfahren zum betreiben einer heizvorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1110429A1 true EP1110429A1 (de) | 2001-06-27 |
EP1110429B1 EP1110429B1 (de) | 2003-05-02 |
Family
ID=7878945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99946054A Expired - Lifetime EP1110429B1 (de) | 1998-08-28 | 1999-08-27 | Elektrische heizvorrichtung und verfahren zum betreiben einer heizvorrichtung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1110429B1 (de) |
DE (2) | DE19839044A1 (de) |
WO (1) | WO2000013467A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE50110692D1 (de) | 2001-01-24 | 2006-09-21 | Leister Process Tech | Heisslufteinrichtung |
AT501559A1 (de) * | 2005-02-25 | 2006-09-15 | Haslmayr Johann Dipl Ing | Heisslufteinrichtung |
EP1814362A1 (de) | 2006-01-30 | 2007-08-01 | Leister Process Technologies | Heizelement für eine Heisslufteinrichtung |
EP2134143B1 (de) | 2008-06-09 | 2010-12-15 | Leister Process Technologies | Elektrisches Widerstandsheizelement für eine Heizeinrichtung zum Erhitzen eines strömenden gasförmigen Mediums |
DE102010031520A1 (de) * | 2010-07-19 | 2012-01-19 | BSH Bosch und Siemens Hausgeräte GmbH | Elektrischer Heizkörper und Durchlauferhitzer |
CN108267260B (zh) * | 2016-12-30 | 2019-05-17 | 北京金风科创风电设备有限公司 | 电连接件、流体状态测试装置和流体换热系统 |
GB2582930B (en) * | 2019-04-08 | 2023-01-11 | Edwards Ltd | Induction heating method and apparatus |
DE102021215100A1 (de) | 2021-12-30 | 2023-07-06 | BSH Hausgeräte GmbH | Haushalts-Dampfgargerät |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0123698B1 (de) * | 1983-04-22 | 1986-01-02 | Steinel GmbH & Co. KG | Elektrischer Heizkörper zum Erhitzen eines Fluidstroms |
DE4343256C2 (de) * | 1993-12-17 | 2000-11-16 | Bsh Bosch Siemens Hausgeraete | Warmwassergerät |
-
1998
- 1998-08-28 DE DE19839044A patent/DE19839044A1/de not_active Withdrawn
-
1999
- 1999-08-27 EP EP99946054A patent/EP1110429B1/de not_active Expired - Lifetime
- 1999-08-27 WO PCT/EP1999/006335 patent/WO2000013467A1/de active IP Right Grant
- 1999-08-27 DE DE59905345T patent/DE59905345D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0013467A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE19839044A1 (de) | 2000-03-02 |
WO2000013467A1 (de) | 2000-03-09 |
EP1110429B1 (de) | 2003-05-02 |
DE59905345D1 (de) | 2003-06-05 |
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