EP2024555A1 - Heating device, in particular for a laundry dryer - Google Patents

Heating device, in particular for a laundry dryer

Info

Publication number
EP2024555A1
EP2024555A1 EP06753661A EP06753661A EP2024555A1 EP 2024555 A1 EP2024555 A1 EP 2024555A1 EP 06753661 A EP06753661 A EP 06753661A EP 06753661 A EP06753661 A EP 06753661A EP 2024555 A1 EP2024555 A1 EP 2024555A1
Authority
EP
European Patent Office
Prior art keywords
air
heating channel
heating
channel
heating device
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
EP06753661A
Other languages
German (de)
French (fr)
Other versions
EP2024555B1 (en
Inventor
Heinz Freese
Wolfhard Jording
Wiebke Riedel
Frank Schiwy
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Priority to AT10001075T priority Critical patent/ATE496163T1/en
Priority to DE502006008787T priority patent/DE502006008787D1/en
Priority to EP10001075A priority patent/EP2186935B1/en
Publication of EP2024555A1 publication Critical patent/EP2024555A1/en
Application granted granted Critical
Publication of EP2024555B1 publication Critical patent/EP2024555B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/26—Heating arrangements, e.g. gas heating equipment
    • D06F58/263—Gas heating equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/32—Temperature
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/50—Responding to irregular working conditions, e.g. malfunctioning of blowers

Definitions

  • Heating device in particular for a tumble dryer
  • Heating device in particular for a tumble dryer, with a gas burner and a valve with a gas nozzle on the primary air can be supplied to the flame, a flame-enclosing tubular heating channel at its inlet secondary air is supplied as combustion air and at the outlet opening of the hot gases tertiary air is immiscible, wherein the heating channel opens with its outlet opening in an air channel for the process air.
  • the known burner is a burner with partial premixing of fuel gas and air.
  • the so-called primary air is sucked in by injector action of the gas nozzles.
  • the secondary air component and the tertiary air component are sucked in via the process air blower.
  • the secondary air enters the heating channel at the burner head and flows around the flame to prevent contact of the flame with the walls of the heating channel or the combustion chamber and thus the heat transfer to the housing.
  • the tertiary air enters at the end of the flame via holes in the lateral surface of the heating channel.
  • the Tertiär Kunststoffö Maschinentechnischen are arranged relative to the cross section of the heating channel in the lower half-shell, so that contact of the flame is avoided with the Schukanalwand.
  • the tertiary air also serves to lower the temperature of the hot air entering the process air duct to process air temperature.
  • the control of the gas supply via a valve and a Zündflammen- or Zündfunkenüberwachung. It has been found that despite the design measures such as the obliquely upwardly rising arrangement of the heating channel and the formation of the tertiary air supply in the region of the flame end in the lower half shell of the heating channel still no particularly low-emission combustion can be achieved.
  • a heating device for a tumble dryer with a first heating channel and a second heating channel is known. Both heating channels have circular cross sections, wherein the second heating channel relative to the first heating channel has an enlarged cross-section.
  • the burner head of the burner protrudes into the inlet opening of the first heating channel, wherein the axial center line of the burner is below the center line of the first heating channel.
  • the outlet opening of the first heating channel opens eccentrically offset downwards into the inlet opening of the second heating channel.
  • the first heating channel also has a guide for entering at the inlet opening secondary air, which extends in the flow direction from a middle upper portion of the first heating channel to the outlet opening of the first heating channel sloping.
  • first and second heating channel requires a greater effort in the production and in the installation of the heating device in a tumble dryer.
  • the component consisting of first and second heating channel is to be adjusted as a separate component during assembly exactly to the burner, so that in fact the desired formation of the air flow is achieved.
  • the invention is therefore based on the object to form a gas-fired heating device for lowest possible low-emission and low-noise heating operation, which can be produced with low production costs.
  • the heating device should be able to be positioned with the least possible installation effort in a tumble dryer.
  • the achievable with the present invention consist in addition to the particularly uniform temperature distribution in the heating channel in the compact design of the heater, which can be fixed and aligned as a module with heating channel, valve, burner, igniter and temperature monitoring during assembly at a single attachment point in the dryer.
  • the annular aperture in the exit aperture causes the flame or hot air stream in the heating channel to be centered by the incoming secondary air and tertiary air.
  • the temperature profile in the heating channel is uniform with low overall temperature without temperature tips through streaking. This has an advantageous effect on the pollutant content in the combustion air.
  • FIG. 5 shows schematically the arrangement of the gas-heated heating device 5 in one
  • FIG. 2 shows schematically the gas-heated heating device 5 with representation of the air supply
  • FIG. 3 shows the heating device 5 in a perspective view with a view of the outlet opening 19 of the heating channel 16, FIG.
  • FIG. 5 shows the heating device 5 in a perspective view with a view of the
  • FIG. 6 shows the positioning aid 39, 40 for the heating device 5 in the air duct 3 as i 5 detail.
  • the tumble dryer has a rotatably mounted drum 1 for receiving the laundry to be dried, which is closed by a door 2.
  • the air duct 3 to the drum inlet 4 is preceded by the gas-heated 0 heating device 5 for heating the dry air.
  • the dry air is drawn in the region of the gas-heated heating device 5 from the room air and passed as a process air flow through the drum 1.
  • the process air is sucked in via the process air blower 6, which is connected downstream of the air duct 7 at the drum outlet 8, and then discharged via the exhaust air opening 9 to the environment.
  • a drying program can be selected via the operating and display device 10 5 and information about safety functions can be displayed.
  • the gas-fired heating device is shown schematically with representation of the air supply.
  • the gas burner 11 is formed with a Venturi tube 12, at its flame opening a perforated burner plate 13 is inserted.
  • the primary air L1 for flame formation o is sucked in via the primary air opening 14 in the region of the gas nozzle by the injector action of the gas nozzle (not shown in detail) and Venturi tube 12.
  • the head of the gas burner 11 opens into the inlet opening 15 of the heating channel 16.
  • the burner plate 13 is associated with a glow starter 17.
  • the gas burner 11 is arranged eccentrically offset with respect to its axial center line in the heating channel 16 (see also Figure 4).
  • secondary air L2 is supplied as combustion air.
  • the secondary air fraction Due to the structural design of the heating device 5, the secondary air fraction, the flows past the flame 18, adjusted so that the flame is modulated but not cooled too much. As a result, the carbon monoxide content is low.
  • an annular aperture 20 is arranged in the outlet opening 19 of the heating channel 16.
  • tertiary air L3 is added to the s hot gases for cooling and out as process air flow PL through the drum 1 (see Figure 1).
  • the tertiary air L3 flows against the flame direction in the heating channel 16 and undergoes in the region of the diaphragm 20 mixing with the hot gases in the heating channel 16 and a deflection in the air duct for the process air PL.
  • the heating device 5 is shown in a perspective view with a view of the outlet opening 19 of the heating channel 16.
  • the annular aperture 20 is arranged eccentrically (see also FIG. 4) in the outlet opening 19.
  • the diaphragm 20 has at the outer diameter of a tubular nozzle 21, whose outer diameter is smaller than the diameter of the heating channel 16 sized i5.
  • This tubular connecting piece 21 forms the connecting piece to the air duct 3 (not shown) for the process air duct to the drum inlet 4 (see FIG. 1).
  • the panel 20 is fixed to at least one attachment point in the adjacent generatrices of heating channel 16 and nozzle 21 in the outlet opening 19 of the heating channel 16.
  • the heating channel 16 has at least one pipe-inward 0 directed up to the edge of the aperture 20 projecting curvature 22, the wall portion forms a further attachment point for the panel 20.
  • the curvature 22 is arranged along an incision made in the circumferential direction of the heating channel 16.
  • the free cross-section between the wall of the heating channel 16 and the outer diameter of the aperture 20 in the frontal outlet opening 19 forms the inflow opening for tertiary air L3.
  • the 5 inflow opening in the direction of the flame 18 is associated with a projecting into the heating channel 16 in the thermostat 28.
  • the thermostat 28 responds to air failure and air throttling.
  • a carrier 24 for the valve 25 and the gas burner 11 is in the lower region of the inlet opening 15 in extension of the lower generatrix attached.
  • the carrier 24 positions the gas burner 11 in the inlet opening 15 of the heating channel 16.
  • the carrier 24 is formed with a mounting foot 26 for fastening the entire heating device 5 in a tumble dryer.
  • a fastening tab 27 is arranged in extension of the upper generatrix of the heating channel 16, which fixes the burner 11 in a vertical cross-sectional plane (see also FIG. 4) of the heating channel 16.
  • This fastening tab 27 also carries a thermostat 29 for detecting a fault state 5, which is arranged in the inflow region of the secondary air L2.
  • the thermostat 29 is connected upstream of the inlet opening 15 and reacts in case of air failure and backflow of the air, for example in wind load on the exhaust port 9, if no backflow in the Exhaust air system is present, or in the event of failure of the process air blower 6.
  • a sensor thermostat 30 which responds to infrared radiation.
  • FIG. 4 shows a view of the end face of the outlet opening 19 of the heating channel 16.
  • the circular center 31 of the panel 20 is eccentrically offset from the vertical center line 32 and the horizontal center line 33 of the outlet opening 19 or the heating channel 16 in the embodiment shown.
  • the vertical center line of the burner plate 13 at the burner head of the gas burner and the vertical center line of the diaphragm 20 are arranged on a common vertical cross-sectional plane 34 of the heating channel 16.
  • the vertical cross-sectional plane 34 is parallel to the dimension X (about 7 mm) offset from the vertical center line 32 of the outlet opening 19 of the heating channel 16 is arranged.
  • the horizontal center line of the burner plate 13 is offset by the dimension Y (about 7 mm) to the center line 33 of the outlet opening.
  • the thermostat 28 in the region of the inlet opening for the tertiary air L3 is positioned on the peripheral line of the heating channel 16 at the angle ⁇ to the vertical center line 32.
  • the glow starter 17 is positioned on the peripheral line of the heating channel in the region of the burner plate 13 preferably at the same angle ⁇ (25 ° to 30 °) to the vertical center line 32.
  • the sensor thermostat 28 associated with the glow starter 17 is preferably arranged on the circumference of the heating channel 16 in the region of the horizontal center line 33.
  • the sensor thermostat 30 is positioned at the angle ⁇ (55 ° to 60 °).
  • the heating device 5 is shown in a perspective view with a view of the inlet opening of the heating channel 16 and the carrier 24 for the gas burner 11 and the valve 25.
  • the carrier 24 has the fastening foot 26 already described in FIG.
  • the mounting foot 26 is formed as an angle connected integrally with the carrier 24, which has step-like positioning tabs 35 at its edge.
  • the positioning tabs 35 engage behind a receptacle on the bottom plate (not shown in detail) of the tumble dryer and hold the entire heating device 5 in the installed position.
  • the heating device 5 can still be fixed via a screw connection 36 or the like.
  • the carrier 24 is formed in its longitudinal direction with a bead 37 for stabilization.
  • the gas burner 11 is fastened to the carrier 24 and to the fastening tab 27 by means of a permanent connection 38 (clinching, riveting).
  • the valve 25 is mounted as a unit by means of a releasable attachment, for example a screw (not shown in detail) on the support 24. This makes it possible to make the valve unit for different types of gas interchangeable with the built-in dryer dryer heater 5.
  • the heating device 5 has in the exit region 19 of the hot air or in its connection region to the air duct 3 a positioning aid, which ensures that the heating channel 16, aperture 20 and gas burner 11 are fixed in the desired position in the device.
  • the Rhausen- shaped nozzle 5 has to an approximately V-shaped receptacle 39 into which a projection 40 engages the air duct 3.
  • FIG. 6 the positioning aid 39, 40 for the heating device 5 in the air duct 3 is shown enlarged.
  • the thermostat 29 shown in Figure 3 for detecting a fault condition can also be connected upstream of the inlet opening in another way. It is e.g. Also, a separate holder tion for the thermostat 29 possible, which is associated with the inlet opening 15. Such a thermostat 29 can be integrated with little effort in all common clothes dryer with gas burners. A return of the flame 18 from the entrance opening 15 is detected via the thermostat. In case of failure, the gas supply to the gas burner 11 is interrupted immediately.
  • the thermostat is formed with a manual reset function.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)

Abstract

An annular baffle (20) is located in the outlet opening (19) of the heating channel (16). The baffle has a tubular support at its outer diameter, which is less than the heating channel diameter. The tubular support discharges into the air channel for process air connected to the heating channel. The baffle center point is offset relative to the vertical and/or horizontal center lines of the outlet opening (19). The tubular support of the heater has a mounting and the air channel a projection, which together locate the heater in the air channel of the process air duct. The vertical center line of the flame outlet opening (burner plate (13)) at the gas burner head, and the vertical center line of the baffle, are located in a common vertical cross sectional plane of the heating channel. This plane is alternatively offset by a distance X, parallel to the vertical center line of the heating channel. The baffle has fastening points between the heating channel and support, fixing it in the outlet opening of the heating channel. The heating channel has bulges projecting inwardly to the edge of the baffle, forming its fixing points. They are formed from incisions cut circumferentially into the heating channel. In the free cross section between heating channel wall and baffle outer diameter, at the air channel outlet opening, there is an opening for the entry of tertiary air. This enters in counterflow to the flame direction and mixes with the hot gases near the baffle; its flow is reversed to enter the air channel for process air. A variant based on the foregoing principles is also described.

Description

Beschreibungdescription
Heizungseinrichtung, insbesondere für einen WäschetrocknerHeating device, in particular for a tumble dryer
Heizungseinrichtung, insbesondere für einen Wäschetrockner, mit einem Gasbrenner und einem Ventil mit Gasdüse an dem Primärluft für die Flammbildung zuführbar ist, einem die Flamme umschließenden rohrförmigen Heizkanal an dessen Eintrittsöffnung Sekundärluft als Verbrennungsluft zuführbar ist und an dessen Austrittsöffnung den heißen Gasen Tertiärluft zumischbar ist, wobei der Heizkanal mit seiner Austrittsöffnung in einen Luftkanal für die Prozessluft mündet.Heating device, in particular for a tumble dryer, with a gas burner and a valve with a gas nozzle on the primary air can be supplied to the flame, a flame-enclosing tubular heating channel at its inlet secondary air is supplied as combustion air and at the outlet opening of the hot gases tertiary air is immiscible, wherein the heating channel opens with its outlet opening in an air channel for the process air.
Es ist aus der US 3,291 ,467 bekannt, einen Wäschetrockner mit einer gasbeheizten Heizungseinrichtung zur Erwärmung des Prozessluftstromes auszubilden. Der Brenner der Heizungseinrichtung ist der Eintrittsöffnung eines Heizkanals vorgeschaltet. Der Heizkanal ist schräg noch oben ansteigend angeordnet und folgt damit der natürlichen Ausrichtung der Flamme. Bei dem Brenner des bekannten Wäschetrockners wird dem Gas Primärluft als Verbrennungsluft vor der Brenneroberfläche zugemischt und Sekundärluft am Eingang des Heizkanals. Am Ausgang des Heizkanals wird dem heißen Gas Tertiärluft zugeführt und als Prozessluftvolumen- strom durch die Trommel geleitet.It is known from US 3,291, 467 to form a clothes dryer with a gas-heated heating device for heating the process air stream. The burner of the heating device is connected upstream of the inlet opening of a heating channel. The heating channel is arranged obliquely rising upward and thus follows the natural orientation of the flame. In the burner of the known tumble dryer the primary air is admixed to the gas as combustion air in front of the burner surface and secondary air at the entrance of the heating channel. At the outlet of the heating channel, tertiary air is supplied to the hot gas and passed through the drum as process air volume flow.
Bei dem bekannten Brenner handelt es sich um einen Brenner mit teilweiser Vormischung von Brenngas und Luft. Die sogenannte Primärluft wird durch Injektorwirkung der Gasdüsen angesaugt. Der Sekundärluftanteil und der Tertiärluftanteil werden über das Prozessluftgebläse angesaugt. Die Sekundärluft tritt am Brennerkopf in den Heizkanal ein und umspült die Flamme, um den Kontakt der Flamme mit den Wandungen des Heizkanals bzw. der Verbrennungskammer und damit den Wärmeübergang auf das Gehäuse zu verhindern. Die Tertiärluft tritt am Flammenende über Bohrungen in der Mantelfläche des Heizkanals ein. Die Tertiärluftöffnungen sind bezogen auf den Querschnitt des Heizkanals in der unteren Halbschale angeordnet, so dass ein Kontakt der Flamme mit der Heizkanalwand vermieden wird. Die Tertiärluft dient außerdem dazu, die Temperatur der Heißluft am Eintritt in den Prozessluftkanal auf Prozesslufttemperatur zu senken. Die Kontrolle der Gaszufuhr erfolgt über ein Ventil und eine Zündflammen- bzw. Zündfunkenüberwachung. Es hat sich gezeigt, dass trotz der konstruktiven Maßnahmen wie z.B. die schräg nach oben hin ansteigende Anordnung des Heizkanals sowie die Ausbildung der Tertiärluftzufuhr im Bereich des Flammenendes in der unteren Halbschale des Heizkanals noch keine besonders schadstoffarme Verbrennung erreicht werden kann.The known burner is a burner with partial premixing of fuel gas and air. The so-called primary air is sucked in by injector action of the gas nozzles. The secondary air component and the tertiary air component are sucked in via the process air blower. The secondary air enters the heating channel at the burner head and flows around the flame to prevent contact of the flame with the walls of the heating channel or the combustion chamber and thus the heat transfer to the housing. The tertiary air enters at the end of the flame via holes in the lateral surface of the heating channel. The Tertiärluftöffnungen are arranged relative to the cross section of the heating channel in the lower half-shell, so that contact of the flame is avoided with the Heizkanalwand. The tertiary air also serves to lower the temperature of the hot air entering the process air duct to process air temperature. The control of the gas supply via a valve and a Zündflammen- or Zündfunkenüberwachung. It has been found that despite the design measures such as the obliquely upwardly rising arrangement of the heating channel and the formation of the tertiary air supply in the region of the flame end in the lower half shell of the heating channel still no particularly low-emission combustion can be achieved.
Aus der DE 103 32 338 A1 sowie der DE 103 32 339 A1 ist eine Heizungseinrichtung für einen Wäschetrockner mit einem ersten Heizkanal und einem zweiten Heizkanal bekannt. Beide Heizkanäle weisen kreisrunde Querschnitte auf, wobei der zweite Heizkanal gegenüber dem ersten Heizkanal einen vergrößerten Querschnitt aufweist. Der Brennerkopf des Brenners ragt in die Eintrittsöffnung des ersten Heizkanals, wobei die axiale Mittellinie des Brenners unterhalb der Mittellinie des ersten Heizkanals liegt. Die Austrittsöffnung des ersten Heizkanals mündet exzentrisch nach unten versetzt in die Eintrittsöffnung des zweiten Heizkanals. Durch diese Maßnahme wird die Lufteintrittsöffnung für die Tertiärluft hauptsächlich an der Oberseite des zweiten Heizkanals ausgebildet. Dadurch wird erreicht, dass die aus dem ersten Heizkanal austretenden heißen Gase, die durch den Wärmeauftrieb nach oben strömen, im oberen Bereich des zweiten Heizkanals besser mit der Tertiärluft vermischt werden. Der erste Heizkanal weist außerdem eine Leiteinrichtung für an der Eintrittsöffnung eintretende Sekundärluft auf, die sich in Strömungsrichtung von einem mittleren oberen Abschnitt des ersten Heizkanals zur Austrittsöffnung des ersten Heizkanals abfallend erstreckt. Durch diese Maßnahme wird der Wärmeauftrieb der Flamme gemindert bzw. die Flamme am Ende des ersten Heizkanals nach unten geleitet. Es erfolgt eine schadstoffärmere Verbrennung mit geringerer Geräuschentwicklung.From DE 103 32 338 A1 and DE 103 32 339 A1, a heating device for a tumble dryer with a first heating channel and a second heating channel is known. Both heating channels have circular cross sections, wherein the second heating channel relative to the first heating channel has an enlarged cross-section. The burner head of the burner protrudes into the inlet opening of the first heating channel, wherein the axial center line of the burner is below the center line of the first heating channel. The outlet opening of the first heating channel opens eccentrically offset downwards into the inlet opening of the second heating channel. By this measure, the air inlet opening for the tertiary air is formed mainly at the top of the second heating channel. This ensures that the emerging from the first heating channel hot gases flowing through the heat buoyancy are better mixed in the upper part of the second heating channel with the tertiary air. The first heating channel also has a guide for entering at the inlet opening secondary air, which extends in the flow direction from a middle upper portion of the first heating channel to the outlet opening of the first heating channel sloping. By this measure, the heat buoyancy of the flame is reduced or passed the flame at the end of the first heating channel down. There is a low-emission combustion with less noise.
Der konstruktive Aufbau mit erstem und zweiten Heizkanal erfordert jedoch einen höheren Aufwand in der Fertigung sowie bei der Montage der Heizungseinrichtung in einem Wäschetrockner. Das aus erstem und zweiten Heizkanal bestehende Bauteil ist als separates Bauteil bei der Montage exakt zum Brenner zu justieren, so dass auch tatsächlich die gewünschte Ausbildung der Luftströmung erreicht wird.The structural design with the first and second heating channel, however, requires a greater effort in the production and in the installation of the heating device in a tumble dryer. The component consisting of first and second heating channel is to be adjusted as a separate component during assembly exactly to the burner, so that in fact the desired formation of the air flow is achieved.
Der Erfindung liegt daher die Aufgabe zugrunde, eine gasbeheizte Heizungseinrichtung für möglichst schadstoffarmen und geräuscharmen Heizbetrieb auszubilden, die mit geringem Fertigungsaufwand herstellbar ist. Außerdem soll die Heizungseinrichtung mit möglichst geringem Montageaufwand in einem Wäschetrockner positioniert werden können.The invention is therefore based on the object to form a gas-fired heating device for lowest possible low-emission and low-noise heating operation, which can be produced with low production costs. In addition, the heating device should be able to be positioned with the least possible installation effort in a tumble dryer.
Erfindungsgemäß wird diese Aufgabe durch eine Heizungseinrichtung mit dem erfindungs- gemäß ausgebildeten Heizkanal gemäß den Merkmalen des Patentanspruchs 1 sowie dem kompakten Aufbau der Heizungseinrichtung gemäß den Merkmalen des Anspruchs 13 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den jeweils nachfolgenden Unteransprüchen.According to the invention, this object is achieved by a heating device with the heating channel designed according to the invention in accordance with the features of patent claim 1 and the compact construction of the heating device according to the features of claim 13. Advantageous embodiments and modifications of the invention will become apparent from the respective following subclaims.
Die mit der Erfindung erreichbaren Vorteile bestehen neben der besonders gleichmäßigen Temperaturverteilung im Heizkanal in dem kompakten Aufbau der Heizungseinrichtung, welche als Modul mit Heizkanal, Ventil, Brenner, Zündvorrichtung und Temperaturüberwachung bei der Montage an einem einzigen Befestigungspunkt im Wäschetrockner fixiert und ausgerichtet werden kann. Die ringförmige Blende in der Austrittsöffnung bewirkt, dass die Flamme bzw. der heiße Luftstrom im Heizkanal durch die eintretende Sekundärluft und Tertiärluft zentriert wird. Dadurch wird der Kontakt der Flamme mit der Wand des Heizkanals vermieden. Das Temperaturprofil im Heizkanal ist gleichmäßig mit insgesamt niedriger Temperatur ohne Temperatur- spitzen durch Schlierenbildung. Dies wirkt sich vorteilhaft auf den Schadstoffanteil in der Verbrennungsluft aus.The achievable with the present invention consist in addition to the particularly uniform temperature distribution in the heating channel in the compact design of the heater, which can be fixed and aligned as a module with heating channel, valve, burner, igniter and temperature monitoring during assembly at a single attachment point in the dryer. The annular aperture in the exit aperture causes the flame or hot air stream in the heating channel to be centered by the incoming secondary air and tertiary air. As a result, the contact of the flame is avoided with the wall of the heating channel. The temperature profile in the heating channel is uniform with low overall temperature without temperature tips through streaking. This has an advantageous effect on the pollutant content in the combustion air.
Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigen:An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. Show it:
5 Figur 1 schematisch die Anordnung der gasbeheizten Heizungseinrichtung 5 in einem5 shows schematically the arrangement of the gas-heated heating device 5 in one
Wäschetrockner,dryer,
Figur 2 schematisch die gasbeheizte Heizungseinrichtung 5 mit Darstellung der Luftzufuhr,2 shows schematically the gas-heated heating device 5 with representation of the air supply,
Figur 3 die Heizungseinrichtung 5 in perspektivischer Darstellung mit Sicht auf die Aus- lo trittsöffnung 19 des Heizkanals 16,3 shows the heating device 5 in a perspective view with a view of the outlet opening 19 of the heating channel 16, FIG.
Figur 4 die Austrittsöffnung 19 des Heizkanals 16 in der Vorderansicht,4 shows the outlet opening 19 of the heating channel 16 in front view,
Figur 5 die Heizungseinrichtung 5 in perspektivischer Darstellung mit Sicht auf den5 shows the heating device 5 in a perspective view with a view of the
Träger 24 für den Gasbrenner 11 und das Ventil 25 undCarrier 24 for the gas burner 11 and the valve 25 and
Figur 6 die Positionierhilfe 39, 40 für die Heizungseinrichtung 5 im Luftkanal 3 als i5 Einzelheit.6 shows the positioning aid 39, 40 for the heating device 5 in the air duct 3 as i 5 detail.
In der Figur 1 ist der Aufbau eines gasbeheizten Wäschetrockners mit schematischer Darstellung der Luftführung von Prozessluft und Verbrennungsluft gezeigt. Der Wäschetrockner weist eine drehbar gelagerte Trommel 1 zur Aufnahme der zu trocknenden Wäsche auf, die durch eine Tür 2 verschlossen ist. Dem Luftkanal 3 zum Trommeleingang 4 ist die gasbeheizte 0 Heizungseinrichtung 5 zur Erhitzung der Trockenluft vorgeschaltet. Die Trockenluft wird im Bereich der gasbeheizten Heizungseinrichtung 5 aus der Raumluft angesaugt und als Prozessluftstrom durch die Trommel 1 geleitet. Die Prozessluft wird über das Prozessluftgebläse 6, welches dem Luftkanal 7 am Trommelausgang 8 nachgeschaltet ist, angesaugt und dann über die Abluftöffnung 9 an die Umgebung abgegeben. Über die Bedien- und Anzeigeeinrichtung 10 5 kann ein Trockenprogramm angewählt und können Informationen zu Sicherheitsfunktionen angezeigt werden.1 shows the construction of a gas-heated clothes dryer with a schematic representation of the air flow of process air and combustion air is shown. The tumble dryer has a rotatably mounted drum 1 for receiving the laundry to be dried, which is closed by a door 2. The air duct 3 to the drum inlet 4 is preceded by the gas-heated 0 heating device 5 for heating the dry air. The dry air is drawn in the region of the gas-heated heating device 5 from the room air and passed as a process air flow through the drum 1. The process air is sucked in via the process air blower 6, which is connected downstream of the air duct 7 at the drum outlet 8, and then discharged via the exhaust air opening 9 to the environment. A drying program can be selected via the operating and display device 10 5 and information about safety functions can be displayed.
In der Figur 2 ist die gasbeheizte Heizungseinrichtung schematisch mit Darstellung der Luftzufuhr gezeigt. Der Gasbrenner 11 ist mit einem Venturirohr 12 ausgebildet, an dessen Flammöffnung eine gelochte Brennerplatte 13 eingesetzt ist. Die Primärluft L1 zur Flammenbildung o wird über die Primärluftöffnung 14 im Bereich der Gasdüse durch die Injektorwirkung von Gasdüse (nicht näher dargestellt) und Venturirohr 12 angesaugt. Der Kopf des Gasbrenners 11 mündet in die Eintrittsöffnung 15 des Heizkanals 16. Der Brennerplatte 13 ist ein Glühzünder 17 zugeordnet. Der Gasbrenner 11 ist bezüglich seiner axialen Mittellinie exzentrisch versetzt im Heizkanal 16 angeordnet (siehe auch Figur 4). An der stirnseitigen Eintrittsöffnung 15 des 5 Heizkanals 16 wird der Flamme 18 Sekundärluft L2 als Verbrennungsluft zugeführt. Bedingt durch die konstruktive Ausgestaltung der Heizungseinrichtung 5 ist der Sekundärluftanteil, der an der Flamme 18 vorbei strömt, derart angepasst, dass die Flamme moduliert aber nicht zu stark gekühlt wird. Dadurch ist der Kohlenmonoxid-Anteil gering. In der Austrittsöffnung 19 des Heizkanals 16 ist eine ringförmig ausgebildete Blende 20 angeordnet. In dem freien Querschnitt zwischen der Wand des Heizkanals 16 und dem Außendurchmesser der Blende 20 wird den s heißen Gasen Tertiärluft L3 zur Kühlung zugemischt und als Prozessluftstrom PL durch die Trommel 1 (siehe Figur 1 ) geführt. Die Tertiärluft L3 strömt entgegen der Flammrichtung in den Heizkanal 16 ein und erfährt im Bereich der Blende 20 eine Vermischung mit den heißen Gasen im Heizkanal 16 sowie eine Umlenkung in den Luftkanal für die Prozessluft PL. Durch eine derartige Luftzufuhr wird der größte Luftanteil zum Trocknen der Wäsche erst hinter der Flamme 18 lo zugemischt.In the figure 2, the gas-fired heating device is shown schematically with representation of the air supply. The gas burner 11 is formed with a Venturi tube 12, at its flame opening a perforated burner plate 13 is inserted. The primary air L1 for flame formation o is sucked in via the primary air opening 14 in the region of the gas nozzle by the injector action of the gas nozzle (not shown in detail) and Venturi tube 12. The head of the gas burner 11 opens into the inlet opening 15 of the heating channel 16. The burner plate 13 is associated with a glow starter 17. The gas burner 11 is arranged eccentrically offset with respect to its axial center line in the heating channel 16 (see also Figure 4). At the frontal inlet opening 15 of the 5 heating channel 16 of the flame 18 secondary air L2 is supplied as combustion air. Due to the structural design of the heating device 5, the secondary air fraction, the flows past the flame 18, adjusted so that the flame is modulated but not cooled too much. As a result, the carbon monoxide content is low. In the outlet opening 19 of the heating channel 16, an annular aperture 20 is arranged. In the free cross section between the wall of the heating channel 16 and the outer diameter of the diaphragm 20 tertiary air L3 is added to the s hot gases for cooling and out as process air flow PL through the drum 1 (see Figure 1). The tertiary air L3 flows against the flame direction in the heating channel 16 and undergoes in the region of the diaphragm 20 mixing with the hot gases in the heating channel 16 and a deflection in the air duct for the process air PL. By such an air supply, the largest proportion of air for drying the laundry is admixed only behind the flame 18 lo.
In der Figur 3 ist die Heizungseinrichtung 5 in perspektivischer Darstellung mit Sicht auf die Austrittsöffnung 19 des Heizkanals 16 gezeigt. Die ringförmig ausgebildete Blende 20 ist exzentrisch (siehe auch Figur 4) in der Austrittsöffnung 19 angeordnet. Die Blende 20 weist am Außendurchmesser einen rohrförmigen Stutzen 21 auf, dessen äußerer Durchmesser geringer i5 als der Durchmesser des Heizkanals 16 bemessen ist. Dieser rohrförmige Stutzen 21 bildet das Verbindungsstück zum nicht näher dargestellten Luftkanal 3 für die Prozessluftführung zum Trommeleingang 4 (siehe Figur 1). Die Blende 20 ist an mindestens einem Befestigungspunkt in den aneinandergrenzenden Mantellinien von Heizkanal 16 und Stutzen 21 in der Austrittsöffnung 19 des Heizkanals 16 fixiert. Der Heizkanal 16 weist mindestens eine rohreinwärts 0 gerichtete bis an den Rand der Blende 20 ragende Wölbung 22 auf, deren Wandabschnitt einen weiteren Befestigungspunkt für die Blende 20 bildet. Die Wölbung 22 ist entlang eines in Um- fangsrichtung des Heizkanals 16 ausgeführten Einschnitts angeordnet. Der frei bleibende Querschnitt zwischen der Wand des Heizkanals 16 und dem Außendurchmesser der Blende 20 in der stirnseitigen Austrittsöffnung 19 bildet die Einströmungsöffnung für Tertiärluft L3. Der 5 Einströmungsöffnung ist in Richtung der Flamme 18 ein in den Heizkanal 16 hinein ragender Thermostat 28 zugeordnet. Der Thermostat 28 reagiert auf Luftausfall und auf Luftdrosselung.In the figure 3, the heating device 5 is shown in a perspective view with a view of the outlet opening 19 of the heating channel 16. The annular aperture 20 is arranged eccentrically (see also FIG. 4) in the outlet opening 19. The diaphragm 20 has at the outer diameter of a tubular nozzle 21, whose outer diameter is smaller than the diameter of the heating channel 16 sized i5. This tubular connecting piece 21 forms the connecting piece to the air duct 3 (not shown) for the process air duct to the drum inlet 4 (see FIG. 1). The panel 20 is fixed to at least one attachment point in the adjacent generatrices of heating channel 16 and nozzle 21 in the outlet opening 19 of the heating channel 16. The heating channel 16 has at least one pipe-inward 0 directed up to the edge of the aperture 20 projecting curvature 22, the wall portion forms a further attachment point for the panel 20. The curvature 22 is arranged along an incision made in the circumferential direction of the heating channel 16. The free cross-section between the wall of the heating channel 16 and the outer diameter of the aperture 20 in the frontal outlet opening 19 forms the inflow opening for tertiary air L3. The 5 inflow opening in the direction of the flame 18 is associated with a projecting into the heating channel 16 in the thermostat 28. The thermostat 28 responds to air failure and air throttling.
An dem Heizkanal 16 ist im unteren Bereich der Eintrittsöffnung 15 in Verlängerung der unteren Mantellinie ein Träger 24 für das Ventil 25 und den Gasbrenner 11 befestigt. Der Träger 24 positioniert den Gasbrenner 11 in der Eintrittsöffnung 15 des Heizkanals 16. Der Träger 24 ist 0 mit einem Befestigungsfuß 26 zur Befestigung der gesamten Heizungseinrichtung 5 in einem Wäschetrockner ausgebildet. Im oberen Bereich der Eintrittsöffnung 15 ist in Verlängerung der oberen Mantellinie des Heizkanals 16 eine Befestigungslasche 27 angeordnet, die den Brenner 11 in einer vertikalen Querschnittsebene (siehe auch Figur 4) des Heizkanals 16 fixiert. Diese Befestigungslasche 27 trägt außerdem einen Thermostat 29 zur Erkennung eines 5 Fehlerzustandes, der im Einströmungsbereich der Sekundärluft L2 angeordnet ist. Der Thermostat 29 ist der Eintrittsöffnung 15 vorgeschaltet und reagiert bei Luftausfall und Rückströmung der Luft z.B. bei Windlast auf die Abluftöffnung 9, wenn keine Rückstauklappe im Abluftsystem vorhanden ist, oder bei Ausfall des Prozessluftgebläses 6. Zur Überwachung der Flamme ist dem Glühzünder 17 hinter einem Ausschnitt in der Wand des Heizkanals 16 ein Sensorthermostat 30 zugeordnet, der auf Infrarotstrahlung reagiert.On the heating channel 16, a carrier 24 for the valve 25 and the gas burner 11 is in the lower region of the inlet opening 15 in extension of the lower generatrix attached. The carrier 24 positions the gas burner 11 in the inlet opening 15 of the heating channel 16. The carrier 24 is formed with a mounting foot 26 for fastening the entire heating device 5 in a tumble dryer. In the upper region of the inlet opening 15, a fastening tab 27 is arranged in extension of the upper generatrix of the heating channel 16, which fixes the burner 11 in a vertical cross-sectional plane (see also FIG. 4) of the heating channel 16. This fastening tab 27 also carries a thermostat 29 for detecting a fault state 5, which is arranged in the inflow region of the secondary air L2. The thermostat 29 is connected upstream of the inlet opening 15 and reacts in case of air failure and backflow of the air, for example in wind load on the exhaust port 9, if no backflow in the Exhaust air system is present, or in the event of failure of the process air blower 6. To monitor the flame is assigned to the glow starter 17 behind a cutout in the wall of the heating channel 16, a sensor thermostat 30 which responds to infrared radiation.
Die Figur 4 zeigt eine Ansicht auf die Stirnseite der Austrittsöffnung 19 des Heizkanals 16. Der Kreismittelpunkt 31 der Blende 20 ist bei dem gezeigten Ausführungsbeispiel gegenüber der vertikalen Mittellinie 32 und der horizontalen Mittellinie 33 der Austrittsöffnung 19 bzw. des Heizkanals 16 exzentrisch versetzt angeordnet. Die vertikale Mittellinie der Brennerplatte 13 am Brennerkopf des Gasbrenners und die vertikale Mittellinie der Blende 20 sind auf einer gemeinsamen vertikalen Querschnittsebene 34 des Heizkanals 16 angeordnet. Die vertikale Quer- schnittsebene 34 ist parallel um das Maß X (ca. 7 mm) versetzt zur vertikalen Mittellinie 32 der Austrittsöffnung 19 des Heizkanals 16 angeordnet. Die horizontale Mittellinie der Brennerplatte 13 ist um das Maß Y (ca. 7 mm) zur Mittellinie 33 der Austrittsöffnung versetzt. Der Thermostat 28 im Bereich der Eintrittsöffnung für die Tertiärluft L3 ist auf der Umfangslinie des Heizkanals 16 unter dem Winkel α zur vertikalen Mittellinie 32 positioniert. Der Glühzünder 17 ist auf der Umfangslinie des Heizkanals im Bereich der Brennerplatte 13 vorzugsweise unter dem gleichen Winkel α (25° bis 30°) zur vertikalen Mittellinie 32 positioniert. Der dem Glühzünder 17 zugeordnete Sensorthermostat 28 ist vorzugsweise am Umfang des Heizkanals 16 im Bereich der horizontalen Mittellinie 33 angeordnet. Der Sensorthermostat 30 ist im Winkel ß (55° bis 60°) positioniert.FIG. 4 shows a view of the end face of the outlet opening 19 of the heating channel 16. The circular center 31 of the panel 20 is eccentrically offset from the vertical center line 32 and the horizontal center line 33 of the outlet opening 19 or the heating channel 16 in the embodiment shown. The vertical center line of the burner plate 13 at the burner head of the gas burner and the vertical center line of the diaphragm 20 are arranged on a common vertical cross-sectional plane 34 of the heating channel 16. The vertical cross-sectional plane 34 is parallel to the dimension X (about 7 mm) offset from the vertical center line 32 of the outlet opening 19 of the heating channel 16 is arranged. The horizontal center line of the burner plate 13 is offset by the dimension Y (about 7 mm) to the center line 33 of the outlet opening. The thermostat 28 in the region of the inlet opening for the tertiary air L3 is positioned on the peripheral line of the heating channel 16 at the angle α to the vertical center line 32. The glow starter 17 is positioned on the peripheral line of the heating channel in the region of the burner plate 13 preferably at the same angle α (25 ° to 30 °) to the vertical center line 32. The sensor thermostat 28 associated with the glow starter 17 is preferably arranged on the circumference of the heating channel 16 in the region of the horizontal center line 33. The sensor thermostat 30 is positioned at the angle β (55 ° to 60 °).
In der Figur 5 ist die Heizungseinrichtung 5 in perspektivischer Darstellung mit Sicht auf die Eintrittsöffnung des Heizkanals 16 und den Träger 24 für den Gasbrenner 11 und das Ventil 25 gezeigt. Der Träger 24 weist den in Figur 3 schon beschriebenen Befestigungsfuß 26 auf. Der Befestigungsfuß 26 ist als einstückig mit dem Träger 24 verbundener Winkel ausgebildet, welcher an seinem Rand stufenartige Positionierlaschen 35 aufweist. Die Positionierlaschen 35 hintergreifen eine Aufnahme an der Bodenplatte (nicht näher dargestellt) des Wäschetrockners und halten die gesamte Heizungseinrichtung 5 in Einbauposition. Zusätzlich kann die Heizungseinrichtung 5 noch über eine Schraubverbindung 36 oder dgl. fixiert werden. Der Träger 24 ist in seiner Längsrichtung mit einer Sicke 37 zur Stabilisierung ausgebildet. In dem gezeigten Ausführungsbeispiel ist der Gasbrenner 11 mittels einer unlösbaren Verbindung 38 (Clinchen, Nie- ten) am Träger 24 sowie an der Befestigungslasche 27 befestigt. Das Ventil 25 ist als Einheit mittels einer lösbaren Befestigung z.B. einer Schraubverbindung (nicht als Einzelheit dargestellt) auf dem Träger 24 montiert. Dadurch ist es möglich, die Ventileinheit für unterschiedliche Gasarten austauschbar an der im Wäschetrockner eingebauten Heizungseinrichtung 5 zu gestalten. Die Heizungseinrichtung 5 weist im Austrittsbereich 19 der heißen Luft bzw. in ihrem Anschlussbereich zum Luftkanal 3 eine Positionierhilfe auf, die gewährleistet, dass Heizkanal 16, Blende 20 und Gasbrenner 11 in der gewünschten Position im Gerät fixiert sind. Der röhr- förmige Stutzen 5 weist dazu eine annähernd v-förmige Aufnahme 39 auf, in die ein Ansatz 40 am Luftkanal 3 einrastet.In the figure 5, the heating device 5 is shown in a perspective view with a view of the inlet opening of the heating channel 16 and the carrier 24 for the gas burner 11 and the valve 25. The carrier 24 has the fastening foot 26 already described in FIG. The mounting foot 26 is formed as an angle connected integrally with the carrier 24, which has step-like positioning tabs 35 at its edge. The positioning tabs 35 engage behind a receptacle on the bottom plate (not shown in detail) of the tumble dryer and hold the entire heating device 5 in the installed position. In addition, the heating device 5 can still be fixed via a screw connection 36 or the like. The carrier 24 is formed in its longitudinal direction with a bead 37 for stabilization. In the exemplary embodiment shown, the gas burner 11 is fastened to the carrier 24 and to the fastening tab 27 by means of a permanent connection 38 (clinching, riveting). The valve 25 is mounted as a unit by means of a releasable attachment, for example a screw (not shown in detail) on the support 24. This makes it possible to make the valve unit for different types of gas interchangeable with the built-in dryer dryer heater 5. The heating device 5 has in the exit region 19 of the hot air or in its connection region to the air duct 3 a positioning aid, which ensures that the heating channel 16, aperture 20 and gas burner 11 are fixed in the desired position in the device. The Röhr- shaped nozzle 5 has to an approximately V-shaped receptacle 39 into which a projection 40 engages the air duct 3.
In Figur 6 ist die Positionierhilfe 39, 40 für die Heizungseinrichtung 5 im Luftkanal 3 vergrößert dargestellt.In FIG. 6, the positioning aid 39, 40 for the heating device 5 in the air duct 3 is shown enlarged.
s Der in Figur 3 dargestellte Thermostat 29 zur Erkennung eines Fehlerzustandes kann auch in anderer Weise der Eintrittsöffnung vorgeschaltet werden. Es ist z.B. auch eine separate Halte- rung für den Thermostat 29 möglich, die der Eintrittsöffnung 15 zugeordnet ist. Ein solcher Thermostat 29 kann mit geringem Aufwand in alle gängigen Wäschetrockner mit Gasbrennern integriert werden. Über den Thermostat wird ein Rückschlag der Flamme 18 aus der Eintrittsöff- iö nung 15 erkannt. Im Fehlerfall wird die Gaszufuhr zum Gasbrenner 11 sofort unterbrochen. Vorzugsweise ist der Thermostat mit einer manuellen Reset-Funktion ausgebildet. s The thermostat 29 shown in Figure 3 for detecting a fault condition can also be connected upstream of the inlet opening in another way. It is e.g. Also, a separate holder tion for the thermostat 29 possible, which is associated with the inlet opening 15. Such a thermostat 29 can be integrated with little effort in all common clothes dryer with gas burners. A return of the flame 18 from the entrance opening 15 is detected via the thermostat. In case of failure, the gas supply to the gas burner 11 is interrupted immediately. Preferably, the thermostat is formed with a manual reset function.

Claims

Patentansprüche claims
1. Heizungseinrichtung (5), insbesondere für einen Wäschetrockner, mit einem Gasbrenner (11 ) und einem Ventil (25) mit Gasdüse an dem Primärluft für die Flammbildung zuführbar ist, einem die Flamme (18) umschließenden rohrförmigen Heizkanal (16) an dessen1. heating device (5), in particular for a tumble dryer, with a gas burner (11) and a valve (25) can be supplied with gas nozzle to the primary air for flame formation, a flame (18) enclosing tubular heating channel (16) at the
5 Eintrittsöffnung (15) Sekundärluft als Verbrennungsluft zuführbar ist und an dessen Austrittsöffnung (19) den heißen Gasen Tertiärluft zumischbar ist, wobei der Heizkanal (5) mit seiner Austrittsöffnung (19) in einen Luftkanal (3) für die Prozessluft mündet, dadurch gekennzeichnet, dass in der Austrittsöffnung (19) des Heizkanals (16) eine ringförmig ausgebildete lo Blende (20) angeordnet ist.5 inlet opening (15) secondary air is supplied as combustion air and at the outlet opening (19) the hot gases tertiary air is immiscible, wherein the heating channel (5) opens with its outlet opening (19) in an air channel (3) for the process air, characterized in that an annular aperture (20) is arranged in the outlet opening (19) of the heating channel (16).
2. Heizungseinrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Blende (20) mit einem am Außendurchmesser angeordneten rohrförmigen Stutzen (21 ) ausgebildet ist, dessen äußerer Durchmesser geringer als der Durchmesser des i5 Heizkanals (16) bemessen ist.2. Heater device according to claim 1, characterized in that the diaphragm (20) is formed with an outer diameter tubular socket (21) whose outer diameter is smaller than the diameter of the i 5 heating channel (16) is dimensioned.
3. Heizungseinrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der rohrförmiger Stutzen (21 ) in den sich an den Heizkanal (16) anschließenden Luftkanal (3) für die Prozessluft mündet.3. Heating device according to claim 2, characterized in that the tubular connecting piece (21) opens into the air channel (3) adjoining the heating channel (16) for the process air.
20 4. Heizungseinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Kreismittelpunkt (31 ) der Blende (20) gegenüber der vertikalen und/oder der horizontalen Mittellinie (33) der Austrittsöffnung (19) exzentrisch versetzt angeordnet ist.20 4. Heater device according to one of claims 1 to 3, characterized in that the circle center (31) of the diaphragm (20) relative to the vertical and / or the horizontal center line (33) of the outlet opening (19) is arranged eccentrically offset.
5. Heizungseinrichtung nach Anspruch 2, s dadurch gekennzeichnet, dass der rohrförmige Stutzen (21 ) der Heizungseinrichtung (5) mit einer Aufnahme (39) und der Luftkanal (3) der Prozessluftführung mit einem Ansatz (40) als Positionierhilfe für die Heizungseinrichtung (5) im Luftkanal (3) der Prozessluftführung aufweist.5. Heating device according to claim 2, characterized in that the tubular connecting piece (21) of the heating device (5) with a receptacle (39) and the air duct (3) of the process air guide with a projection (40) as a positioning aid for the heating device (5 ) in the air duct (3) of the process air guide.
6. Heizungseinrichtung nach einem der Ansprüche 1 bis 5, 0 dadurch gekennzeichnet, dass die vertikale Mittellinie (32) der Flammaustrittsöffnung (Brennerplatte 13) am Brennerkopf des Gasbrenners (11) und die vertikale Mittellinie (32) der Blende (20) auf einer gemeinsamen vertikalen Querschnittsebene (34) des Heizkanals (16) angeordnet sind. 6. Heating device according to one of claims 1 to 5, 0, characterized in that the vertical center line (32) of the flame outlet opening (burner plate 13) on the burner head of the gas burner (11) and the vertical center line (32) of the diaphragm (20) on a common vertical cross-sectional plane (34) of the heating channel (16) are arranged.
7. Heizungseinrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die vertikale Querschnittsebene (34) parallel um das Maß X versetzt zur vertikalen Mittellinie (32) des Heizkanals (16) angeordnet ist.7. Heating device according to claim 6, characterized in that the vertical cross-sectional plane (34) offset parallel to the dimension X to the vertical center line (32) of the heating channel (16) is arranged.
5 8. Heizungseinrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Blende (20) an mindestens einem Befestigungspunkt in den aneinandergren- zenden Mantellinien von Heizkanal (16) und Stutzen (21 ) in der Austrittsöffnung (19) des Heizkanals (16) fixiert ist.5 8. Heating device according to one of claims 1 to 7, characterized in that the diaphragm (20) at at least one attachment point in the mutually adjacent generatrices of heating channel (16) and nozzle (21) in the outlet opening (19) of the heating channel ( 16) is fixed.
lo 9. Heizungseinrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Heizkanal (16) mindestens eine rohreinwärts gerichtete bis an den Rand der Blende (20) ragende Wölbung (22) aufweist, deren Wandabschnitt einen Befestigungspunkt für die Blende (20) bildet.9. Heating device according to one of claims 1 to 8, characterized in that the heating channel (16) has at least one pipe-directed up to the edge of the diaphragm (20) protruding curvature (22) whose wall portion has a fastening point for the diaphragm (20 ).
i5 10. Heizungseinrichtung nach Anspruch 9, dadurch gekennzeichnet, dass die Wölbung (22) entlang eines in Umfangsrichtung des Heizkanals (16) ausgeführten Einschnitts (23) angeordnet ist.i 5 10. Heating device according to claim 9, characterized in that the curvature (22) is disposed along a process executed in the circumferential direction of the heating channel (16), the sipe (23).
11. Heizungseinrichtung nach einem der Ansprüche 1 bis 10, 20 dadurch gekennzeichnet, dass der frei bleibende Querschnitt zwischen Heizkanalwand und Außendurchmesser der Blende (20) in der stirnseitigen Austrittsöffnung (19) des Heizkanals (16) eine Einströmungsöffnung für Tertiärluft bildet.11. Heating device according to one of claims 1 to 10, 20, characterized in that the free cross-section between Heizkanalwand and outer diameter of the diaphragm (20) in the frontal outlet opening (19) of the heating channel (16) forms an inflow opening for tertiary air.
12. Heizungseinrichtung nach Anspruch 11 , 5 dadurch gekennzeichnet, dass die Tertiärluft entgegen der Flammrichtung in den Heizkanal (16) einströmt und im Bereich der Blende (20) eine Vermischung mit den heißen Gasen im Heizkanal (16) sowie eine Umlenkung in den Luftkanal (3) für die Prozessluft erfährt.12. Heating device according to claim 11, 5 characterized in that the tertiary air flows contrary to the flame direction with the heating duct (16) and in the region of the aperture (20) mixing with the hot gases in the heating channel (16) and a deflection in the air duct ( 3) experiences for the process air.
13. Heizungseinrichtung, insbesondere für einen Wäschetrockner, mit einem Gasbrenner (11 ) 0 und einem Ventil (25) mit Gasdüse an dem Primärluft für die Flammbildung zuführbar ist, einem die Flamme (18) umschließenden rohrförmigen Heizkanal (16) an dessen Eintrittsöffnung (15) Sekundärluft als Verbrennungsluft zuführbar ist und an dessen Austrittsöffnung (19) den heißen Gasen Tertiärluft zumischbar ist, wobei der Heizkanal (16) mit seiner Austrittsöffnung (19) in einen geschlossenen Luftkanal (3) für die Prozessluft mündet, dadurch gekennzeichnet, dass an dem Heizkanal (16) im unteren Bereich der Eintrittsöffnung in Verlängerung der unteren Mantellinie ein Träger (24) für das Ventil (25) und den Gasbrenner (11 ) befestigt angeordnet ist, der den Gasbrenner (11 ) in der Eintrittsöffnung (15) des Heizkanals (16) 5 positioniert, wobei der Träger (24) mit einem Befestigungsfuß (26), insbesondere zur13. heating device, in particular for a tumble dryer, with a gas burner (11) 0 and a valve (25) can be supplied with gas nozzle to the primary air for flame formation, a flame (18) enclosing tubular heating channel (16) at its inlet opening (15 ) Secondary air is supplied as combustion air and at the outlet opening (19) the tertiary air can be mixed with the hot gases, wherein the heating channel (16) with its outlet opening (19) opens into a closed air channel (3) for the process air, characterized in that on the heating channel (16) in the lower region of the inlet opening in extension of the lower generatrix a carrier (24) for the valve (25) and the gas burner (11) is fixed, which the gas burner (11) in the inlet opening (15) of the heating channel (16) 5 positioned, wherein the carrier (24) with a mounting foot (26), in particular for
Befestigung der gesamten Heizungseinrichtung (5) in einem Wäschetrockner, ausgebildet ist und dass an dem Heizkanal (16) im oberen Bereich in Verlängerung der oberen Mantellinie eine Befestigungslasche (27) angeordnet ist, die den Gasbrenner (11 ) in der vertikalen Querschnittsebene (34) des Heizkanals fixiert.Fixing the entire heating device (5) in a tumble dryer, is formed and that on the heating channel (16) in the upper region in extension of the upper generatrix a fastening tab (27) is arranged, which the gas burner (11) in the vertical cross-sectional plane (34) fixed the heating channel.
iö 14. Heizungseinrichtung nach Anspruch 13, dadurch gekennzeichnet, dass der Gasbrenner (11 ) mittels einer unlösbaren Verbindung (38) am Träger und/oder der Befestigungslasche (27) befestigt ist.14. Heating device according to claim 13, characterized in that the gas burner (11) by means of a permanent connection (38) on the support and / or the fastening tab (27) is attached.
15. Heizungseinrichtung nach Anspruch 13 oder 14, i5 dadurch gekennzeichnet, dass die Befestigungslasche (27) einen Temperatursensor (29) trägt.15. Heating device according to claim 13 or 14, i 5 characterized in that the fastening tab (27) carries a temperature sensor (29).
16. Heizungseinrichtung nach Anspruch 13, dadurch gekennzeichnet, dass das Ventil (25) in einer lösbaren Aufnahme am Träger (24) fixiert ist.16. Heating device according to claim 13, characterized in that the valve (25) is fixed in a releasable receptacle on the carrier (24).
20 17. Heizungseinrichtung nach Anspruch 13, dadurch gekennzeichnet, dass der Befestigungsfuß (26) als einstückig mit dem Träger (24) verbundener Winkel ausgebildet ist, welcher an seinem Rand stufenartige Positionierlaschen (35) aufweist, die eine Aufnahme an der Bodenplatte des Wäschetrockners hintergreifen und die gesamte 5 Heizungseinrichtung (5) in Einbauposition halten.20 17. Heating device according to claim 13, characterized in that the mounting foot (26) is formed as integral with the carrier (24) connected angle, which at its edge step-like positioning tabs (35) which engage behind a receptacle on the bottom plate of the tumble dryer and the entire 5 heating means (5) hold in the installed position.
18. Heizungseinrichtung, insbesondere für einen Wäschetrockner, mit einem Gasbrenner (11 ) und einem die Flamme (18) umschließenden Heizkanal (16) an dessen Eintrittsöffnung (15) Sekundärluft als Verbrennungsluft zuführbar ist, dadurch gekennzeichnet, 0 dass der Eintrittsöffnung (15) ein Thermostat (29) zur Erkennung eines Fehlerzustandes vorgeschaltet ist. 18 heating device, in particular for a tumble dryer, with a gas burner (11) and a flame (18) enclosing the heating channel (16) at its inlet (15) secondary air can be supplied as combustion air, characterized in that the inlet opening (15) a Thermostat (29) is connected upstream to detect a fault condition.
EP06753661A 2006-05-17 2006-05-17 Gas-heated laundry dryer with heating device Not-in-force EP2024555B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT10001075T ATE496163T1 (en) 2006-05-17 2006-05-17 GAS HEATED CLOTHES DRYER WITH HEATING DEVICE
DE502006008787T DE502006008787D1 (en) 2006-05-17 2006-05-17 Gas-heated clothes dryer with heating device
EP10001075A EP2186935B1 (en) 2006-05-17 2006-05-17 Gas-heated laundry dryer with heating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2006/004636 WO2007131531A1 (en) 2006-05-17 2006-05-17 Heating device, in particular for a laundry dryer

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP10001075.0 Division-Into 2010-02-03

Publications (2)

Publication Number Publication Date
EP2024555A1 true EP2024555A1 (en) 2009-02-18
EP2024555B1 EP2024555B1 (en) 2010-10-06

Family

ID=36888875

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10001075A Not-in-force EP2186935B1 (en) 2006-05-17 2006-05-17 Gas-heated laundry dryer with heating device
EP06753661A Not-in-force EP2024555B1 (en) 2006-05-17 2006-05-17 Gas-heated laundry dryer with heating device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP10001075A Not-in-force EP2186935B1 (en) 2006-05-17 2006-05-17 Gas-heated laundry dryer with heating device

Country Status (6)

Country Link
US (1) US8161961B2 (en)
EP (2) EP2186935B1 (en)
AT (2) ATE496163T1 (en)
DE (2) DE502006008052D1 (en)
ES (2) ES2356037T3 (en)
WO (1) WO2007131531A1 (en)

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KR101942075B1 (en) * 2012-08-29 2019-01-24 삼성전자주식회사 Clothing dryer
WO2014037509A1 (en) 2012-09-07 2014-03-13 Novozymes A/S Method of drying textile using alternating pressure
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Also Published As

Publication number Publication date
WO2007131531A1 (en) 2007-11-22
ES2356037T3 (en) 2011-04-04
ES2348909T3 (en) 2010-12-16
US8161961B2 (en) 2012-04-24
US20090183386A1 (en) 2009-07-23
ATE483846T1 (en) 2010-10-15
ATE496163T1 (en) 2011-02-15
EP2024555B1 (en) 2010-10-06
DE502006008787D1 (en) 2011-03-03
EP2186935A1 (en) 2010-05-19
EP2186935B1 (en) 2011-01-19
DE502006008052D1 (en) 2010-11-18

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