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EP2846344B1 - Commutateur thermique - Google Patents

Commutateur thermique Download PDF

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Publication number
EP2846344B1
EP2846344B1 EP14177293.9A EP14177293A EP2846344B1 EP 2846344 B1 EP2846344 B1 EP 2846344B1 EP 14177293 A EP14177293 A EP 14177293A EP 2846344 B1 EP2846344 B1 EP 2846344B1
Authority
EP
European Patent Office
Prior art keywords
switch
housing
switch according
temperature
metal part
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.)
Active
Application number
EP14177293.9A
Other languages
German (de)
English (en)
Other versions
EP2846344A2 (fr
EP2846344A3 (fr
Inventor
Rainer Mitschele
Hans-Christian Liehr
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.)
Thermik Geraetebau GmbH
Original Assignee
Thermik Geraetebau GmbH
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 Thermik Geraetebau GmbH filed Critical Thermik Geraetebau GmbH
Publication of EP2846344A2 publication Critical patent/EP2846344A2/fr
Publication of EP2846344A3 publication Critical patent/EP2846344A3/fr
Application granted granted Critical
Publication of EP2846344B1 publication Critical patent/EP2846344B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01H37/34—Means for transmitting heat thereto, e.g. capsule remote from contact member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/504—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by thermal means
    • 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
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • 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
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H37/5427—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing

Definitions

  • the present invention relates to a temperature-dependent switch with a temperature-dependent switching mechanism, a housing receiving the switching mechanism, two provided on the switch first terminals, between which the switching mechanism in dependence on its temperature establishes or opens an electrically conductive connection, and with a heating resistor, the outside disposed on the housing and is electrically in series with the first two terminals.
  • Such a switch is from the DE 43 36 564 C2 known.
  • the well-known switch is designed as a sealed switch with two-piece, current-carrying metal housing, as he also for example from the DE 21 21 802 A or the DE 196 23 570 C2 is known.
  • the encapsulated switch is arranged on a ceramic support plate, on which a thick-film resistor is arranged between conductor tracks, which at its one end is electrically connected to the conductive lower part the encapsulated switch is connected.
  • the other end of this heating resistor is connected to one of the conductor tracks, which serves as a soldering surface, to which a first pigtail is soldered.
  • the second pigtail is electrically soldered to the conductive lid portion of the sealed switch.
  • the lower part of the switch rests with its outer bottom on the heating resistor.
  • the thick-film resistor can be covered by an insulating layer.
  • the switch is to be soldered to a lateral trace on the Suplatter, which is not mentioned in this document, as the soldering is to take place. As a result, a linear cohesive contact is produced between the lower part and the conductor track serving as the soldering surface.
  • Such temperature-dependent switches are used in a known manner to protect electrical equipment from overheating.
  • the switch is electrically connected via its two first terminals in series with the device to be protected and mechanically arranged on the device so that it is in thermal communication with this.
  • a temperature-dependent switching mechanism of spring washer, bimetallic snap-action disc and movable contact member is arranged, which is in the closed state of the switch in contact with a stationary contact part inside of the upper part, which is plated through to the outside to a first terminal on the upper part.
  • Another first connection is the conductive lower part.
  • the operating current of the device to be protected flows through the two contact parts and the spring washer in the lower part.
  • the from the DE 43 36 564 C2 known switch is equipped because of the heating resistor with a current-dependent switching function, for which the heating resistor is permanently connected electrically in series with the first terminals.
  • the operating current of the device to be protected thus constantly flows through this heating resistor, which can be dimensioned so that it ensures that the bimetallic snap disk is heated to a temperature above its response temperature when a certain operating current is exceeded, so that the switch at an increased Operating current already opens before the device to be protected has warmed up inadmissible.
  • the circuit Below the response temperature of the bimetallic snap disk, the circuit is closed and the device to be protected is powered by the switch with power. Increases the temperature either due to an excessive operating current or as a result of overheated, to be protected device beyond a permissible value, so deforms the bimetallic snap disk, whereby the switch is opened and the supply of the device to be protected is interrupted.
  • the now de-energized device can then cool down again.
  • the thermally coupled to the device switch cools down again, which then automatically closes again. While such switching behavior protects e.g. A hair dryer can be quite useful, this is not desirable anywhere where the device to be protected after switching off may not automatically turn on to avoid damage. This is for example for electric motors, which are used as drive units.
  • the temperature-dependent switching mechanism may also comprise only a bimetallic snap-action disk which carries the movable contact part and thus carries the operating current.
  • the derailleur may also comprise a bimetallic spring tongue, as in the DE 198 16 807 A1 is described.
  • This bimetallic spring tongue carries at its free end a movable contact part, which cooperates with a stationary counter contact.
  • the stationary mating contact is electrically connected to one of the first terminals, wherein the other first terminal is electrically connected to the clamped end of the bimetallic spring tongue.
  • the bimetallic spring tongue guides the operating current of the electrical device to be protected.
  • the temperature-dependent switch is to carry particularly high currents, so often a current transfer member in the form of a contact bridge or a contact plate is used, which is moved by a spring member and carries two contact parts, which cooperate with two stationary mating contacts.
  • the operating current of the device to be protected flows from the first mating contact via the first contact part into the contact plate, through it to the second contact part and from this into the second mating contact.
  • the spring part is thus de-energized. It is also known to use the spring member itself, so for example a bimetallic snap disk or a working against a bimetallic Federschnappulation as a contact bridge.
  • the switches must be able to reliably protect the motors both in the limit mode with maximum allowable power and with a blocking rotor. To test whether the switch does this, usually two tests are performed.
  • the motor In the so-called heating test, the motor is operated at maximum power, whereby neither the flow of current through the switch nor the heat transferred thereby from the motor to the switch may open the switch.
  • the motor is connected to the operating voltage with the rotor locked , which results in an operating current flowing through the motor which is three to five times greater than the usual operating current.
  • the response temperature of the bimetallic snap disk could be chosen to be above the temperature that the engine assumes at maximum allowable power during operation and transmits to the switch, but below the temperature to which the bimetallic snap disk is subjected by the heating resistor is heated when it is traversed by the current with blocked rotor.
  • the switch In addition to good thermal coupling, the switch must also meet the required number of switching cycles, which should be at least 3,000 for typical requirements as described above. For smaller operating currents up to approx. 4 amps and switching temperatures of approx. 160 ° C, the known switches also meet these requirements.
  • the DE 10 2011 016 133 B4 suggests therefore, in contrast to the construction of the aforementioned DE 43 36 564 C2 flat solder the bottom of the switch and not only the lateral transition between the bottom and side wall on the support.
  • the bottom of the switch serves two purposes, on the one hand, it lies on the entire surface of the heating resistor, on the other hand, it is held flat by material bond on the soldering surface.
  • This flat material connection in addition to the heating resistor results in a very good thermal connection of the switch to the heating resistor, the switch is set in this way not only mechanically very stable on the support plate, this type of definition also leads to the desired thermal coupling.
  • DE-A1-4142716 discloses a temperature-dependent switch according to the preamble of claim 1.
  • the heating resistor is formed as a sheet-metal part which is welded to the housing, wherein on the metal part, a further connection is provided.
  • the thermal connection of the heating resistor to the housing is realized in a structurally simple and inexpensive manner. If the housing is current-conducting where the heating resistor is welded, the electrical connection to one of the first two connections is simultaneously produced by welding if the conductive housing either already serves as one of the first connections or according to the invention with one of the first Connections is connected. The other first terminal of the switch and a further connection provided on the heating resistor then serve the external connection of the switch, for example by soldering on connecting leads.
  • first connections are understood to be the two connections of a switch via which it is electrically connected to a device to be protected if it is not provided according to the invention with an outer metal part which acts as a heating resistor and provides a further connection ,
  • the advantage in this case is in particular that the heating of the housing is effected by the flowing operating current with the aid of a welded metal part, whereby the current heat is distributed away from the switching contact points to the housing and to the rear derailleur.
  • the metal part is wavy, which speaks at first glance against the use of a welded externally to the housing metal part.
  • this resulting ripple makes it possible to use thin metal parts, because the current and heat do not occur over a large area over the entire metal part but over the welds of the heating resistor formed by the metal part into the housing.
  • switches with or without self-holding function can be equipped with a defined current sensitivity.
  • a "sheet metal part” is understood to mean a flat and thin metal plate made of a suitable metal or suitable metal alloy with a corresponding electrical conductivity, which like a sheet metal part, in particular a thin sheet, is produced by rolling from suitable blanks.
  • the sheet-metal parts can also be produced in other ways.
  • the sheet metal part used according to the invention can also be referred to as a sheet metal part.
  • the housing is designed to be electrically conductive at least in a section which is electrically connected to one of the first terminals, wherein the sheet metal or metal part is welded to the electrically conductive section, or if the housing as a whole is electrically conductive is.
  • the invention is therefore applicable to all switches, which have at least one current-carrying housing part or an electrically conductive housing or housing part, with which one of the first terminals is or can be connected.
  • the invention can therefore be used in existing switches, without the structure of the switch must be changed as such.
  • the metal part is welded to the housing at at least two spot welds, preferably to the metal part as further connection a connection piece is welded, more preferably, the connection piece is welded to at least two welding points to the metal part.
  • the metal part can be fastened to the housing in a simple and inexpensive manner, the electrical and thermal connection being defined by the welding points, which is advantageous in particular when setting the resistance value of the metal part. Operating current and current heat are thus passed through the spot welds in the housing.
  • the metal part protrudes with a portion over the housing, on which the further connection is provided, wherein the further connection can also be arranged centrally or otherwise on the metal part.
  • the further connection can either lie within the contour of the housing or laterally next to the floor or cover or above or below the housing.
  • the inventively welded to the outside of the housing metal part so the location of one of the external connections in a structurally simple and inexpensive way to choose arbitrarily.
  • the metal part measured between the further terminal and the housing or the welding points has an ohmic resistance value which is less than 100 m ⁇ , preferably between 2 and 50 m ⁇ , wherein preferably the metal part has a thickness which is at least 50 microns.
  • the derailleur comprises a bimetal snap-action disc which is mechanically connected to a movable contact part and presses below its switching temperature against a stationary contact part and lifts above its switching temperature of this, wherein the stationary contact part connected to one of the first terminals is, and the derailleur is connected at least when abutting contact parts with the other first terminal.
  • a spring snap-action disc which biases the movable contact part in the sense of an abutment against the stationary contact part
  • a bimetal snap-action disc which lifts the movable contact part above its switching temperature of the stationary contact part, wherein further preferably the spring snap-action disc is arranged between stationary contact part and bimetal snap-action disc.
  • bimetallic snap disk which performs both the operating current and the contact pressure and provides for the temperature-dependent opening, can by a spring-snap disk, in addition to the bimetallic snap-action or alone causes the contact pressure ,
  • the bimetallic snap disk are mechanically and electrically relieved in their low temperature position, which contributes to a greater long-term stability of their switching behavior.
  • the derailleur has a current transmitting member which cooperates with two stationary contact parts, which are each connected to one of the first terminals, wherein preferably one of the first terminals is electrically connected to the housing, further preferably the switching mechanism is a bimetallic snap disk includes, which is mechanically connected to the power transmission member and this presses below its switching temperature against the two stationary contact parts and lifts above their switching temperature of these, and further preferably, the derailleur comprises a spring washer which biases the power transmission member in the sense of a system against the stationary contact parts, wherein the bimetallic snap disk lifts the power transmission member above its switching temperature of the stationary contact parts.
  • the switch can lead significantly higher currents than the above-mentioned switch, in which the current is passed through the bimetallic snap-action disc or through the spring snap-action disc. This is particularly advantageous when the switch is used to power powerful electric motors that require high operating currents.
  • Temperature-dependent switch with a current transmitting member which cooperates with two stationary contact parts are, for example, from DE 26 44 411 A1 known.
  • the two stationary contact parts which are arranged in the upper part, are connected in series with the supply current of the device to be protected, so that the current flows through the current transmitting member, when the switch is at a temperature below the switching temperature.
  • the power transmission member may be a separate contact plate, but it is also possible in individual cases, to use the bimetallic snap disk or the spring snap-action as a power transmission member.
  • one of the two first connections is electrically connected to the electrically conductive lower part, which in turn is connected to the heating resistor, which is connected to the further connection.
  • the current flows from the further terminal through the heating resistor into the lower part and from there via the first terminal to the second stationary contact part, from there through the current transfer member to the first stationary contact part and then via the first contact part to the other first terminal.
  • the inventive design of the heating resistor as a metal part can thus be used in all temperature-dependent switches having an electrically conductive housing part to which the metal part can be welded.
  • the temperature-dependent switching mechanism can be constructed as desired, as long as it ensures that, depending on its temperature, it has an electrically conductive connection between the electrically conductive housing part, since it acts as one of the first connections or is connected according to the invention with one of the first connections, and the other first connection or opens.
  • the switch in which the housing of the switch, if it is not yet provided with the metal part, the operating current does not lead, the switch has an insulating base, on which the two first terminals are arranged, and on the the housing is attached, wherein preferably one of the two first terminals is electrically connected to the housing.
  • the switch can be additionally provided with a self-holding resistor, so that the open switch does not cool and automatically closes again.
  • Fig. 1 is denoted by a temperature-dependent switch 10, which includes a cup-shaped lower part 11 which is closed by an upper part 12 which is held with the interposition of an insulating film 13 by a flanged edge 14 on the lower part 11.
  • a temperature-dependent switch 10 which includes a cup-shaped lower part 11 which is closed by an upper part 12 which is held with the interposition of an insulating film 13 by a flanged edge 14 on the lower part 11.
  • a temperature-dependent switching mechanism 15 is arranged, which is a Federschnappulation 16, which carries centrally a movable contact part 17, on which a freely inserted bimetallic disc 18 is seated.
  • the Federschnappulation 16 is supported on an inner bottom 19 inside of the lower part 11, which is made of electrically conductive material.
  • the movable contact member 17 is in abutment with a stationary contact member 20 which is provided on an inner side 21 of the upper part 12, which is also made of metal in this embodiment, although it is sufficient for the practice of the invention, if the housing at least in one Section is electrically conductive, in the switch 10 so at least the lower part 11 electrically conducts.
  • the temperature-dependent switching mechanism 15 in the in Fig. 1 shown low-temperature position an electrically conductive connection between the upper part 12 and the lower part 11 forth, the operating current via the stationary contact part 20, the movable contact part 17 and the spring snap disk 16 flows.
  • Such a temperature-dependent switch 10 is for example from the DE 196 23 570 A1 The contents of which are hereby made the subject of the present disclosure.
  • first terminal 22 is used in the switch Fig. 1 a contact surface in a central region of the upper part 12.
  • a further first connection is the lower part 11, which can be contacted for example via the edge 14 or a bottom 26.
  • the switch 10 is equipped with a heating resistor 24 in the form of a metal part 25, which is externally welded to the outer bottom 26 of the lower part 11 and is electrically in series with the first terminals.
  • the metal part 25 is welded in the embodiment shown at four welds 27 to the outer bottom 26, which is preferably done by resistance welding. In Fig. 1 two of the four spot welds 27 can be seen.
  • a contact surface is provided, which serves as a further connection 28 for the switch 10.
  • terminals 22, 28 can be soldered in a known manner depending on a terminal lug with its respective inner end, which then serve for interconnection with a device to be protected. For this purpose, welding angles can be welded to the connections 22, 28.
  • the metal part 25 has between the terminal 28 and the lower part 11 - via the welding points 27 - an ohmic resistance, which is in Milliohm Symposium.
  • any electrically conductive sheet-metal part can be used, which has the corresponding resistance value at the dimensions possible here, as will be explained in more detail below.
  • the metal part 25 is connected both electrically and thermally to the lower part 11.
  • the metal part 25, which in the exemplary embodiment shown has a thickness of 50 ⁇ m indicated at 29, waves to such an extent that only the welding points 27 contribute to the electrical and thermal contact with the lower part 11.
  • the resulting ripple is in Fig. 1 indicated at 31.
  • the metal part 25 could also be welded laterally to the conductive lower part 11 if the floor 26 is to be kept free as a heat transfer surface.
  • connection 22 would be electrically connected in series with the connection 28 via the heating resistor 24.
  • the edge 14 or the bottom 26 of the lower part 11 would be available.
  • an insulating layer can be arranged between the bottom 26 and metal part 25, so far in the premises of the applicant.
  • the switch 10 may also be equipped with a self-holding function, that is, have a further resistor which is electrically parallel to the first terminals.
  • the cover part 12 is made of PTC thermistor, in which case the insulating film 13 is omitted without replacement, so that the cover part 12 forming PTC resistor is electrically connected to both first terminals 22 and 11/14.
  • Such a switch is in the DE 195 17 310 A1 described.
  • a self-holding resistor designed as a thick-film resistor can also be arranged on the cover part, as described, for example, in US Pat DE 195 14 853 A1 is described. In the switch known from this document, the self-holding resistor is applied to the insulating film 13.
  • Fig. 2 shows a view of the circular bottom 26 of the switch 10 Fig. 1 , It can be seen that the four spot welds 27 in the four corners 32 of the metal part 25 are centered.
  • a welding angle 34 is fixed centrally with three welding points 33, to which a pigtail 35 is welded.
  • a second pigtail 36 which is electrically connected to the one first terminal 22.
  • the square metal part 25 has edge lengths 37 of 10 mm, resulting in a thickness 29 of 50 microns to a resistance of about 10 m ⁇ between the pigtail 35 and - via the welds 27 and 33 - the bottom 26 leads, if a metal part Spring band steel 1.4310 is used.
  • the metal part 25 may also have any other geometric shape, in particular, the welding angle 34 may also be welded off-center on the metal part.
  • the metal part 25 may for example be rectangular, triangular, round, circular, oval or teardrop-shaped, wherein the welding angle 34 or an arbitrarily formed connection piece can be welded centrally or on the edge of the metal part 25, which can also project laterally beyond the bottom 26.
  • the metal part measured between the other terminal 28 or here the welding angle 34 and the housing has an ohmic resistance of less than 100 m ⁇ , preferably about 10 m ⁇ .
  • Fig. 3 is designated at 40 another temperature-dependent switch, like the switch 10 off Fig. 1 is provided with a heating element formed by a metal part.
  • the switch 40 includes a temperature-dependent switching mechanism 41 which is housed in a housing 42.
  • the housing 42 has an upper part 43 made of insulating material, which closes an electrically conductive lower part 44 whose edge 45 defines the upper part 43 on the lower part 44.
  • the lower part 44 which forms the electrically conductive portion of the housing 42, on which the metal part 25 is welded.
  • the switching mechanism 41 comprises a spring snap-action disc 46 and a bimetal snap-action disc 47, which, together with the spring snap-action disc 46, is centrally penetrated by a pin-like rivet 48, by which these are mechanically connected to a current transfer member 49 in the form of a contact plate.
  • the spring snap-action disc 46 is clamped with its edge 51 between a circumferential shoulder 52 inside in the lower part 44 and a spacer ring 53, on which the upper part 43 rests with its inner side 54
  • the bimetallic snap disk 47 is supported with its edge 55 on an inner bottom 56 of the lower part 44.
  • the round, in the present case circular power transmission member 49 has in the direction of the upper part 43 a circumferentially circumferential, electrically conductive contact surface 57, which cooperates with two stationary contact parts 58, 59, which are arranged on the inner side 54 of the upper part 43.
  • the stationary contact parts 58, 59 are formed as inner heads of contact rivets 61, 62, which pass through the upper part 43 and end in outer sections 63, 64. Between the sections 63, 64 an insulating web 65 is provided.
  • a connecting piece 67 or 68 is respectively arranged with tabs 71 and 72, which serve as the first terminals of the switch 40.
  • the lower part 44 has an outer bottom 69, to which the heating element 24 forming metal part 25 is welded with four welds 27, as described above for the switch 10.
  • the metal part 25 could also be welded laterally to the conductive lower part 44, if the bottom 69 is to be kept free as a heat transfer surface.
  • the welding angle 34 may be welded to the base 69 before welding the metal part 25, as shown in FIG Fig. 2 has been described.
  • the switch 30 looks like the switch 10, so that in this respect to avoid repetition Fig. 2 is referenced.
  • the upper, U-shaped tabs 71, 72 are folded down on the sections 63 and 64 and inserted into the form of "tunnel" usually stripped ends of the pigtails and soldered.
  • a pigtail 73 is soldered only to the tab 71, as in the plan view of Fig. 4 is shown.
  • the tab 72 associated with the second stationary contact part 59 is electrically connected in a comparable manner to a connecting part 74 which is connected to the conductive lower part 44 via its edge 45.
  • the connecting part 74 is formed by solder, which connects the edge 45 electrically and mechanically to the connector 68.
  • the stationary contact part 59 is connected to the electrically conductive lower part 44, which is connected via the welding points 27 to the heating resistor 24, to which via the welding angle 34, a second pigtail 75 is connected, as in the plan view of Fig. 4 is indicated.
  • the heating resistor 24 is thus electrically in series with the stationary contact part 59th
  • the PTC resistor thus formed is parallel to the first terminals 71, 72 and provides a self-holding function, as it is known from DE 198 27 113 A1 is known.
  • the self-holding resistor is also provided on the inside or outside of the cover part 43 made of insulating material and may be designed, for example, as a thick-film resistor.
  • Fig. 5 shows a plan view of a further embodiment of a switch 80 which is equipped with a heating resistor 24 in the form of a metal part 25.
  • the switch 80 has an insulating base 81 from which two connection electrodes 82, 83 protrude as connections.
  • the base 81 is inserted in a metallic, electrically conductive housing 84, which is pushed onto the base 81 as a cap.
  • At the base 81 is an in Fig. 5 held by the housing 84 concealed, temperature-dependent switching mechanism, as for example in the DE 195 09 656 A1 , of the DE 10 2004 036 117 A1 , of the DE10 2008 031 389 B3 or the DE 10 2011 016 896 B3 is shown.
  • the switching mechanism establishes an electrically conductive connection between the two connection electrodes 82, 83 or opens the electrical connection.
  • the metal part 25 is welded to the housing 84 at the welding points 27, as described above for the switches 10 and 40.
  • a connection electrode 85 is welded in this embodiment.
  • connection electrode 83 is electrically connected to the housing 84 via a connection part 86; the connecting part 86 fulfills the same function as the connecting part 74 in the case of the switch 40 Fig. 4 ,
  • the connecting part 86 is in Fig. 5 shown only schematically, it may take any suitable configuration.
  • connection electrodes 82, 83, 85 and pigtails can be used instead of the connection electrodes 82, 83, 85 and pigtails. Then it may be possible to dispense with the connecting part 86 and one of the two existing at the switch as the first terminals leads are connected directly to the housing.
  • the heating resistor 24 is thus connected via the housing 84, the connecting part 86, the connecting electrode 83 and the temperature-dependent switching mechanism electrically in series between the two first terminals in the form of the connection electrodes 82 and 85. It serves in a similar manner as in the switch 40 for a defined current-dependent switching.
  • temperature-dependent switching mechanism can be equipped in the manner described temperature-dependent switches with two first terminals, between which the switching mechanism temperature-dependent electrical connection, and in at least one section electrically conductive housing by the inventively used metal part with a current-dependent switching function ,
  • this switching function can be designed and improved defined by the metal part used in the invention.
  • the metal part 25 is also welded to the outside of the bottom 26 of the switch 10, as in Fig. 1 and 2 is shown.
  • the metal part 25 has here teardrop shape, and the further connection 28 is in the embodiment of Fig. 6 not centrally on the metal part 25 but on a portion 93 of the metal part 25, which forms, so to speak, the outlet of the drop, that is, where the metal part 25 projects laterally beyond the switch 10.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)

Claims (18)

  1. Commutateur dépendant de la température avec un mécanisme de coupure (15 ; 41) dépendant de la température, un boîtier (11, 12, 42 ; 84) recevant le mécanisme de coupure (15 ; 41), deux premiers raccordements (22, 14, 26 ; 63, 64 ; 82, 83) prévus sur le commutateur (10 ; 40 ; 80), entre lesquels le mécanisme de coupure (15 ; 41) établit ou interrompt en fonction de sa température une liaison électroconductrice et avec une résistance de chauffage (24) qui est agencée à l'extérieur sur le boîtier (11, 12 ; 42, 84) et se trouve en série électriquement par rapport aux deux premiers raccordements (22, 14, 26 ; 71, 72 ; 82, 83),
    caractérisé en ce que la résistance de chauffage (24) est réalisée en tant qu'une partie métallique en forme de tôle (25) qui est soudée au boîtier (11, 12 ; 42 ; 84), un autre raccordement (28) étant prévu sur la partie métallique (25).
  2. Commutateur selon la revendication 1, caractérisé en ce que le boîtier (11, 12 ; 42, 84) est réalisé au moins dans une section (11, 44) de manière électroconductrice qui est reliée électriquement à l'un des premiers raccordements (22, 14, 26 ; 71, 72 ; 82, 83) et en ce que la partie métallique (25) est soudée à la section électroconductible (11 ; 44).
  3. Commutateur selon la revendication 1 ou 2, caractérisé en ce que le boîtier (84) est réalisé dans l'ensemble de manière électroconductible.
  4. Commutateur selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la partie métallique (25) est soudée sur au moins deux points de soudage (27) au boîtier (11, 12 ; 42, 84).
  5. Commutateur selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'une pièce de raccordement (34) est soudée à la partie métallique (25) en tant qu'autre raccordement (28).
  6. Commutateur selon la revendication 5, caractérisé en ce que la pièce de raccordement (34) est soudée sur au moins deux points de soudage (33) à la partie métallique (25).
  7. Commutateur selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la partie métallique (25) dépasse avec une section (93) du boîtier (11 ; 12), sur lequel l'autre raccordement (28) est prévu.
  8. Commutateur selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'autre raccordement (28) est agencé au milieu sur la partie métallique (25).
  9. Commutateur selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la partie métallique (25) présente une valeur de résistance ohmique qui est inférieure à 100 mΩ, de préférence se situe entre 2 et 50 mΩ, mesurée entre l'autre raccordement (28) et le boîtier (11, 12 ; 42, 84).
  10. Commutateur selon l'une quelconque des revendications 1 à 9, caractérisé en ce que la partie métallique (25) présente une épaisseur (29) qui s'élève au moins à 50 µm.
  11. Commutateur selon l'une quelconque des revendications 1 à 10, caractérisé en ce que le mécanisme de coupure (15) comporte un disque d'enclenchement bimétallique (18) qui est mécaniquement relié à une partie de contact mobile (17) et presse celle-ci sous sa température de commutation contre une partie de contact stationnaire (20) et la soulève de celle-ci au-dessus de sa température de commutation, la partie de contact stationnaire (20) étant reliée à l'un des premiers raccordements (22), et le mécanisme de coupure (15) étant relié au moins pour des parties de contact (17, 20) reposant l'une contre l'autre à l'autre premier raccordement (11, 14, 26).
  12. Commutateur selon la revendication 11, caractérisé en ce qu'un disque à ressort (16) est prévu, lequel précontraint la partie de contact mobile (17) au sens d'une installation contre la partie de contact (20) stationnaire, le disque d'enclenchement bimétallique (18) soulevant la partie de contact mobile (17) au-dessus de sa température de commutation de la partie de contact stationnaire (20).
  13. Commutateur selon l'une quelconque des revendications 1 à 10, caractérisé en ce que le mécanisme de coupure (41) présente un organe de transmission de courant (49) qui coagit avec deux parties de contact stationnaires (58, 59) qui sont reliées chacune à l'un des premiers raccordements (71, 72).
  14. Commutateur selon la revendication 13, caractérisé en ce que l'un des premiers raccordements (72) est électriquement relié au boîtier (42).
  15. Commutateur selon la revendication 12 ou 13, caractérisé en ce que le mécanisme de coupure (41) comporte un disque d'enclenchement bimétallique (47) qui est mécaniquement relié à l'organe de transmission de courant (49) et presse celui-ci sous sa température de commutation contre les deux parties de contact (58, 59) stationnaires et le soulève de celles-ci au-dessus de sa température de commutation.
  16. Commutateur selon la revendication 15, caractérisé en ce que le mécanisme de coupure (41) présente un disque à ressort (46) qui précontraint l'organe de transmission de courant (49) au sens d'une installation contre les parties de contact stationnaires (58, 59), le disque d'enclenchement bimétallique (47) soulevant l'organe de transmission de courant (49) au-dessus de sa température de commutation des parties de contact stationnaires (58, 59).
  17. Commutateur selon l'une quelconque des revendications 1 à 10, caractérisé en ce qu'il présente un socle isolant (81), sur lequel les deux premiers raccordements (82, 83) sont agencés, et sur lequel est enfiché le boîtier (84).
  18. Commutateur selon la revendication 17, caractérisé en ce que l'un des deux premiers raccordements (83) est électriquement relié au boîtier (84).
EP14177293.9A 2013-08-07 2014-07-16 Commutateur thermique Active EP2846344B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013108508.3A DE102013108508A1 (de) 2013-08-07 2013-08-07 Temperaturabhängiger Schalter

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EP2846344A2 EP2846344A2 (fr) 2015-03-11
EP2846344A3 EP2846344A3 (fr) 2015-05-20
EP2846344B1 true EP2846344B1 (fr) 2016-05-25

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US (1) US9691576B2 (fr)
EP (1) EP2846344B1 (fr)
CN (1) CN104347311A (fr)
DE (1) DE102013108508A1 (fr)
DK (1) DK2846344T3 (fr)
ES (1) ES2581749T3 (fr)
PL (1) PL2846344T3 (fr)

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DE102014108518A1 (de) * 2014-06-17 2015-12-17 Thermik Gerätebau GmbH Temperaturabhängiger Schalter mit Distanzring
DE102014116888B4 (de) * 2014-11-18 2018-05-17 Thermik Gerätebau GmbH Temperaturabhängiger Schalter
US10371585B2 (en) * 2017-06-05 2019-08-06 General Electric Company Temperature sensor assembly for swirling flows
DE102018100890B3 (de) * 2018-01-16 2019-07-18 Marcel P. HOFSAESS Temperaturabhängiger Schalter
JP6997685B2 (ja) * 2018-07-31 2022-01-18 ボーンズ株式会社 電流遮断装置、安全回路及び２次電池パック
CN110189958B (zh) * 2019-05-07 2024-12-03 江门市余航电子科技有限公司 一种ptc断电复位温控器
DE102019112074B4 (de) * 2019-05-09 2020-12-17 Marcel P. HOFSAESS Temperaturabhängiger Schalter
DE102019125450B4 (de) * 2019-09-20 2021-04-08 Marcel P. HOFSAESS Temperaturabhängiger Schalter
DE102019125452B4 (de) * 2019-09-20 2021-04-22 Marcel P. HOFSAESS Temperaturabhängiger Schalter
DE102019128367B4 (de) * 2019-10-21 2021-06-10 Marcel P. HOFSAESS Temperaturabhängiger schalter
CN114446708B (zh) * 2022-01-06 2023-04-21 苏州工业园区凯恩电子科技有限公司 一种热保护开关
DE102022100684B3 (de) * 2022-01-13 2023-06-07 Audi Aktiengesellschaft Thermisches Koppelelement
DE102022120445B3 (de) * 2022-08-12 2023-11-30 Marcel P. HOFSAESS Temperaturabhängiger Schalter
DE102022120446B3 (de) * 2022-08-12 2023-11-30 Marcel P. HOFSAESS Temperaturabhängiger Schalter

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DE7630734U1 (de) 1976-10-01 1977-01-20 Hofsaess, Peter, 7530 Pforzheim Temperaturwächter
DE3644514A1 (de) * 1986-12-24 1988-07-07 Inter Control Koehler Hermann Bimetallschalter
DE3710672C2 (de) * 1987-03-31 1997-05-15 Hofsaes Geb Zeitz Ulrika Temperaturwächter mit einem Gehäuse
DE8806648U1 (de) * 1988-05-20 1989-06-22 Hofsäss, Peter, 7530 Pforzheim Temperaturschalteinrichtung
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DE19509656C2 (de) 1995-03-17 1997-01-16 Radbruch Jens Dipl Ing Temperaturschutzschalter
DE19514853C2 (de) 1995-04-26 1997-02-27 Marcel Hofsaes Temperaturwächter mit einem bei Übertemperatur schaltenden Bimetall-Schaltwerk
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DE102011016133B4 (de) 2011-03-29 2012-10-18 Marcel P. HOFSAESS Temperaturabhängiger Schalter mit Vorwiderstand
EP2506281B1 (fr) * 2011-03-29 2015-10-07 Marcel P. Hofsaess Commutateur thermodépendant avec résistance protectrice
DE102011016896C5 (de) 2011-04-13 2016-10-27 Tmc Sensortechnik Gmbh Temperaturschutzschalter
DE102012103306B3 (de) * 2012-04-17 2013-04-25 Thermik Gerätebau GmbH Temperaturabhängiger Schalter mit Kontaktteil als Heizwiderstand

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Publication number Publication date
EP2846344A2 (fr) 2015-03-11
ES2581749T3 (es) 2016-09-07
PL2846344T3 (pl) 2016-11-30
DK2846344T3 (en) 2016-08-29
US20150042443A1 (en) 2015-02-12
US9691576B2 (en) 2017-06-27
DE102013108508A1 (de) 2015-02-12
CN104347311A (zh) 2015-02-11
EP2846344A3 (fr) 2015-05-20

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