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
  • H05B1/0252—Domestic applications
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H37/00—Thermally-actuated switches
  • H01H37/02—Details
  • H01H37/04—Bases; Housings; Mountings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
  • B23K26/20—Bonding
  • B23K26/21—Bonding by welding
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H37/00—Thermally-actuated switches
  • H01H37/02—Details
  • H01H37/04—Bases; Housings; Mountings
  • H01H37/043—Mountings on controlled apparatus
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H37/00—Thermally-actuated switches
  • H01H37/02—Details
  • H01H37/32—Thermally-sensitive members
  • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H37/00—Thermally-actuated switches
  • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
  • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material

Definitions

• Thermal switching device method for their preparation and method for mounting a thermal switching device on a
• the present invention relates to a thermal switching device according to the preamble of claim 1, a method for producing a thermal switching device according to the preamble of claim 14 and a method for mounting a thermal switching device on a heating device according to the preamble of claim 17.
• Thermal switching devices of the type of interest are, in particular, temperature regulators, temperature limiters, temperature monitors or temperature protectors, which are in thermal contact with the heating device of a consumer product and automatically execute a switching operation when a predetermined temperature threshold value is exceeded.
• thermal switching devices are commonly used in commodities such as kettles, water heaters, coffee makers, washing machines, irons and the like.
• temperature controllers used as a temperature sensor usually a Bimetallschnapplicate, the temperature-dependent z.
• B. two stable snap positions (deflections) assumes (bistable bimetallic snap) and depending on their respective deflection, a circuit is opened or closed again.
• a thermal fuse instead of the bimetallic snap-action disk, a melting device is required, for example.
• B. enamel pellet by means of which when a temperature is exceeded, a circuit can be interrupted.
• a corresponding thermal switching device in the form of a thermal temperature controller and a thermal temperature fuse can be seen for example from DE 197 06 316 C2.
• the thermal switching device comprises a thermally conductive, preferably plate-shaped carrier (or base plate called) on which the housing or the base of the thermal switching device is located and which also serves to attach the thermal switching device to the surface of the heater.
• a thermally conductive, preferably plate-shaped carrier or base plate called
• the thermal switching device comprises a thermally conductive, preferably plate-shaped carrier (or base plate called) on which the housing or the base of the thermal switching device is located and which also serves to attach the thermal switching device to the surface of the heater.
• the support for attachment usually has at least one, preferably two opposing mounting tabs, each with a bore.
• a support plate is known for example from DE 20 2005 019 880 111.
• the thermal switching device is attached, for example, to a pre-installed on the heater threaded bolt by means of a nut. This type of attachment can only be done manually. It is not suitable for automation. In addition, an undefined air gap often occurs between the carrier plate and the heating device, which can lead to only moderate heat transfer and thereby to increased reaction times of the thermal switching device.
• the attachment tabs of the carrier must be sufficiently large dimensions for receiving the bore for the threaded bolt, which in turn means that this type of attachment requires an increased space requirement.
• the thermal switching device can be attached to the heater also by means of a welded joint.
• the carrier of the thermal switching device on the underside bulging downwards Tip ignition contour formed z. B. stamped, which serves a controlled formation of an arc.
• the introduction of the peak ignition contour on the carrier is very expensive.
• an unevenness is inevitably formed by the embossing process of the carrier, which means that an immediate of the main surface, that is not the peak ignition contour having region, can not rest flat on the surface of the heater.
• the carriers equipped with a peak ignition contour can be supplied to production only with difficulty, since the peak ignition contour is mechanically very sensitive, for example, with a typical diameter of 0.6 mm and a height of 0.6 mm. Damage results in an undefined and therefore defective weld joint, which can lead to damage at z. B. a thermal fuse with slight thermal and / or mechanical stress drops from the heater. A process-safe handling is therefore not possible.
• heaters for everyday objects as well as the support of thermal switching devices often consist of aluminum because of the low weight and good thermal conductivity.
• aluminum is difficult to weld because it has a comparatively low melting temperature (about 660 ° C).
• the object of the present invention is to provide a thermal switching device, a method for producing a thermal switching device and a method for mounting a thermal switching device on a heater, wherein a high-quality connection between the carrier and heating device with simultaneous possibility a process-reliable processing can be ensured.
• the present object is achieved in the generic thermal switching device by the features of the characterizing part of claim 1.
• Advantageous embodiments of the thermal switching device are claimed in the subclaims.
• the invention makes it possible first to complete the thermal switching device in the manufacturing process. Only then, so to speak in the last production step can a peak ignition component z. B. a bolt with a peak ignition contour on the thermal switching device z. B. are attached to the carrier.
• the so completed thermal switching device must be kept ready in the manufacturing process for further processing only as a unit to handle together. As a result, the peak ignition contour of the component or bolt is not exposed to extraordinary mechanical stresses.
• the component or the bolt passes through the carrier such that the tip ignition contour in the region of the underside of the carrier protrudes from the bolt down and the component or the bolt protrudes on the top of the carrier, by means of a gripper or the like, the component or the bolt gripped in a simple manner and thus the manageable unit consisting of component or the bolt and thermal switching device, handled in a simple manner z. B. positioned at the desired location and / or z. B. also be pressed against the heater during the welding process. This allows an exact positioning and position and / or contact pressure adjustment and therefore ensures a qualitatively improved and at the same time automated to be performed weld joint.
• the bolt is embossed and / or pressed into the carrier.
• the bolt has a preferably circumferential collar, the bolt, in particular if it is embossed or pressed into the carrier, can be additionally effectively secured to the carrier in its position.
• a tooth profile on the collar of the bolt ensures a mechanically improved bond of the carrier with the embossed and / or pressed-in bolt, in particular an increase in the torque from bolt to carrier.
• the tooth profile is on the side of the bolt and is designed to open in stamping direction. It is preferably arranged circumferentially.
• the toothed profile may expediently have a multiplicity of tooth-like elevations arranged circumferentially in an outer region, which press into the material of the carrier during the pressing or embossing and ensure an intimate bond.
• the bolt has a horizontal, at least over a partial area, preferably a completely circumferential recess or groove.
• the groove serves to receive displaced material of the carrier due to the toothing.
• the displaced material in the groove serves to ensure that the bolt can not be pushed out of the carrier again (axial holding function).
• the underside surface of the carrier only the peak ignition contour survives.
• the underside of the bolt hereby terminates substantially flush with the underside surface of the carrier. In this way, a particularly good heat transfer between the surface of the heater and the carrier can be achieved.
• the wearer does not have a superficial unevenness on its underside, as was inevitably the case when a peak ignition contour was impressed directly into the support.
• the invention makes this possible in the form of an arrangement in which the top surface of the carrier is covered by the top surface of the carrier. Zündung contour also a part of the bolt survives. This may be desirable if a delayed reaction of the thermal switching device is desired, for example a controller with a "slower control.”
• the possibility of a defined setting of the gap width can positively influence the control behavior or switching behavior automated production possible.
• the bolt and / or the carrier made of an aluminum alloy.
• the peak firing contour is a tip firing wart.
• the collar extends at least substantially flush with the top or bottom surface of the carrier.
• the tip-firing pin may be provided with an alignment mark, preferably with an upper-side slot or a lateral flattening.
• the alignment mark has the advantage that the tip ignition bolt can be positioned in a defined manner in the gripper and, as a result, an angle of rotation positioning can be achieved when welding the tip ignition bolt on the heating device.
• thermal switching device wherein the carrier of the thermal switching device has a through-hole
• the fastening of the bolt in the carrier by pressing and / or embossing, preferably using a tooth profile.
• the pressing or stamping of the bolt is carried out in the carrier from above. This ensures that the thermal switching device can not accidentally come off the bolt.
• Claimed is also a method for mounting a thermal switching device, in particular a temperature controller, a temperature limiter, a temperature monitor or a thermal fuse on a heating device using a thermal switching device according to at least one of claims 1 to 13.
• This method is characterized in that bolts both as an electrode for carrying out a welding operation, in particular arc welding operation or a resistance welding operation and as a retaining projection for a gripping and / or positioning device for preferably automated assembly of the thermal switching device on a surface of a heater or a commodity having a heater is used.
• the thermal switching device by means of the gripping and / or positioning, which acts on the bolt above the carrier, are positioned on the heater exactly in the desired welding position or welding position.
• the underside of the pin of the thermal switching device can be pressed by means of the gripping and / or positioning, which acts on the bolt above the carrier to the heater so a certain contact pressure during the welding operation can be exercised without affecting the position or location the thermal switching device changes unintentionally.
• the lower end side of the bolt (apart from the tip ignition contour) runs at least substantially flush with the underside surface of the carrier, so that a virtually gap-free, mechanically secure and process-automatable connection can be achieved.
• FIG. 1 shows a first embodiment of a plate-shaped carrier with bolts and a peak ignition contour in a partial sectional view, in which the bolt is inserted from the upper side into the carrier;
• Fig. 1 1 is a perspective view of another embodiment of the bolt with peak ignition contour and orientation mark as well
• the reference numeral 2 in Fig. 1 shows a plate-shaped carrier of a thermal switching device which carries both a (not shown) temperature controller and a (also not shown) thermal fuse.
• the carrier 2 shown by way of example in FIG. 1 comprises a plurality of protruding fastening straps 5, which serve to fix a (not shown) ceramic housing of the temperature controller or the thermal fuse in each case in its position.
• a corresponding receptacle 12 is provided in the carrier.
• a circular recess 13 which accommodates a bimetal disc (not shown), the bimetallic disc also being fixed in position by circumferential retaining projections 4.
• the carrier 2 is preferably made of an aluminum alloy.
• the carrier shown in FIG. 1 has, for example, on one side an attachment tab 5 in the form of an extension of the carrier.
• this fastening tab 5 is a through hole 3.
• a bolt 6 Through the through hole 3 through a bolt 6 extends with an upper-side first end and a lower-side second end.
• the second end of the bolt 6 carries at its front side a peak ignition contour z.
• the bolt 6 serves both as an electrode for an arc welding operation and as a gripping projection for a gripper of a preferably automated welding apparatus.
• the top 7 is used to initiate an arc in a defined manner and thus avoid the formation of an uncontrolled arc.
• the bolt 2 is also preferably made of an aluminum alloy. As can be seen from FIG.
• the substantially longer part of the bolt 6 projects upwards on the upper side of the carrier 2. Only a slight portion 9 of the bolt 6 may, if necessary, project beyond the underside surface of the carrier 2 together with the tip ignition lug 7.
• the bolt 6 is pressed into the carrier 2, or embossed.
• the bolt 6, for example, a preferably in the longitudinal direction downwardly open tooth profile 10, which, see. In particular Fig. 3, a plurality along a peripheral portion provided teeth having a tapered radially outward, the same dive when pressing on the top of the carrier 2 in the material and form an intimate toothing.
• a collar 8, preferably in the immediate vicinity of the tooth profile 10, is provided. The collar 8 serves as a stop aid and is located in the embodiment shown in FIGS. 1 to 3 in the region of the top surface of the carrier second
• the collar 8 is substantially flush with the upper side of the carrier 2.
• the impressing of the bolt 6 takes place in this embodiment, as shown in Fig. 3, from above.
• This has the advantage that the carrier can not solve due to the top-side arrangement of the federal government in the attachment state of the thermal switching element on the heater no longer.
• a groove 1 1 is provided on the underside of the toothed profile 10. This serves to absorb deformed material of the carrier 2 occurring during the pressing and / or stamping process and thereby facilitate the production of the grouting or embossing connection. As a result, the axial pull-out force is increased.
• the attachment of the bolt 6 to the carrier 2 usually only takes place when the respective thermal switching device of the carrier has been previously completed.
• the invention makes it possible to produce production temperature diverse temperature controller, thermal fuses, temperature limiter and combinations thereof, which can be completed only at a later date with the bolt 6. This creates a new type each time.
• the collar 8 is located in the region of the underside surface of the carrier 2.
• a projecting portion 9 of the bolt is provided on the underside of the carrier 2.
• the collar 8 of the bolt 6 is preferably also in a position approximately flush with the underside surface of the carrier 2.
• the bolt 6 of this embodiment corresponds, see Fig. 6, the pin of the embodiment of FIGS. 1 to 3, wherein only the area provided for the pressing or embossing is oriented mirror-inverted.
• Fig. 7 is a further embodiment of the present invention ersicht- loan.
• the bolt 6 is not in the region of a fastening tab but z. B. positioned in the inner part of the carrier 2.
• the carrier 2 according to FIG. 7 is, for example, a carrier 2 with a total of three for a specific functionality such as, for.
• One of the aforementioned recesses eg the central recess
• a section 9 of the bolt projecting beyond the underside surface of the carrier can also be provided here for setting a defined gap width.
• the bolt 6 is pressed or embossed in this embodiment from above into the carrier 2. It is expressly noted that the pressing or Impressing the bolt 6 in the carrier 2 is not necessarily a recess 13, as shown in FIG. 7, requires. There must be only one passage opening 3.
• the representation acc. Fig. 9A shows in a highly simplified schematic representation of a z. B. consisting of an aluminum alloy heater
• the entire thermal switching element which is supported by the carrier 2, taken on the upper side of the carrier 2 projecting bolt by a gripper 15 (not shown) automated handling device and the top surface of the heater 1 are supplied.
• a gripper 15 (not shown) automated handling device and the top surface of the heater 1 are supplied.
• an electrical potential applied to the bolt 6, which serves as a welding electrode, and to the surface of the heating device 1 an arc 16 is formed which leads to a melting of the material and to an intimate connection of the thermal switching element d. H. whose carrier 2 leads to the heating device 1, as shown schematically in FIG. 9B.
• the reference numeral 17 denotes highly abstracted the melting area in the surface of the heater. 1
• a defined gap 14 can be set by the section 9 of the bolt 6 projecting on the underside.
• the gap 14 can be varied by adjusting the longitudinal extension of the section 9, and thus the switching behavior of the thermal switching element can be changed.
• the thermal switching device can be positioned exactly to the surface to the heater 1 and, if necessary, also welded under adjustment of a defined contact pressure.
• a very high quality of the welded joint itself is generated, on the other hand, the possibility is created to make the assembly of the thermal switching device on the surface of the heater 1 in comparison to previously much higher degree of automation.
• the invention also makes it possible, by suitable selection of the dimension of the projecting portion 9 of the bolt 6 to adjust the gap 14 between the support 2 and the surface of the heater 1, depending on the desired thermal coupling of the thermal switching device to the heater. 1
• Fig. 1 1 shows a variant of the bolt 6 with an alignment mark 18 in the form of a lateral indentation.
• the embodiment according to FIG. 12 shows a bolt 6 with an alignment mark 18 in the form of an upper-side slot.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Manufacturing & Machinery (AREA)
• Plasma & Fusion (AREA)
• Mechanical Engineering (AREA)
• Thermally Actuated Switches (AREA)
• Control Of Resistance Heating (AREA)
• Connection Of Plates (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=50726518

Family Applications (1)

Country Status (3)

Citations (6)

Family Cites Families (2)

• 2014
  • 2014-04-11 DE DE202014101728.3U patent/DE202014101728U1/de not_active Expired - Lifetime
• 2015
  • 2015-04-08 WO PCT/EP2015/057631 patent/WO2015155246A1/de active Application Filing
  • 2015-04-08 CN CN201580017382.1A patent/CN106133871A/zh active Pending
  • 2015-04-08 DE DE112015001772.0T patent/DE112015001772B4/de active Active

Patent Citations (6)

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