EP0107152B1 - Thermostat - Google Patents

Thermostat Download PDF

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Publication number
EP0107152B1
EP0107152B1 EP83110198A EP83110198A EP0107152B1 EP 0107152 B1 EP0107152 B1 EP 0107152B1 EP 83110198 A EP83110198 A EP 83110198A EP 83110198 A EP83110198 A EP 83110198A EP 0107152 B1 EP0107152 B1 EP 0107152B1
Authority
EP
European Patent Office
Prior art keywords
casing
switching device
temperature switching
snap switch
snap
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.)
Expired
Application number
EP83110198A
Other languages
German (de)
English (en)
Other versions
EP0107152A1 (fr
Inventor
Bruno Lotter
Willi Essig
Hans Mayer
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Gerate Blanc und Fischer 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 EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Gerate Blanc und Fischer GmbH
Priority to AT83110198T priority Critical patent/ATE20404T1/de
Publication of EP0107152A1 publication Critical patent/EP0107152A1/fr
Application granted granted Critical
Publication of EP0107152B1 publication Critical patent/EP0107152B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2657—Details with different switches operated at substantially different pressures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2671—Means to detect leaks in the pressure sensitive element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers

Definitions

  • the invention relates to a temperature switching device with a housing which has receptacles for several snap switches and with an actuating element to be arranged in the housing, which comprises an expansion element and a transmission mechanism for acting on the respective snap switch, the respective snap switch having an isolating snap switch carrier and associated external connections forms an independent, separate component that can be connected to the housing.
  • each snap switch is arranged on a snap switch carrier which is designed as a completely closed housing which accommodates the switch elements intended for the switching functions, as is customary in conventional prefabricated snap switches. For this reason, the switch elements of each of the snap switches are neither accessible for checking the switch functions nor, if necessary, for adjusting the snap switch. Furthermore, because of their arrangement in separate switch housings, these snap switches require a relatively large accommodation space, as a result of which the size of the entire temperature switching device is increased not inconsiderably.
  • Another major disadvantage of this known design is that it is not set up to arrange a smaller number, ie two or one snap switch, on the same temperature switching device instead of the three snap switches provided and thereby equip it for the respective requirements.
  • All snap switches are attached to the housing side by side with common, continuous pins, which in any case makes it necessary to populate all snap switch receptacles with snap switches, otherwise the remaining snap switches or the remaining snap switch on the above-mentioned pins will be missing due to the missing occupation of one or two recordings can slide back and forth and thus no longer assume a functionally secure position compared to the transmission mechanism.
  • Separating plates made of insulating material provided between the individual snap switches are also mounted on the pins without a direct connection to one another and are therefore not suitable for maintaining their predetermined position if a receptacle is not occupied by a snap switch.
  • a temperature switching device has also become known (FR-A-14 09 569), the housing of which can have up to four receptacles for separate snap switches and, depending on the design requirements, has a number of receptacles corresponding to the number of snap switches to be used, or for the purpose with four It is provided in a star shape around a central axis that a single snap switch can be arranged in the receptacle in which it occupies the most favorable position for connection to the electrical lines to be connected.
  • no thought has been given to being able to build a single-pole or multi-pole temperature switching device using one and the same basic building blocks.
  • the invention has for its object to provide a temperature switching device of the type described, which ensures precise control of the snap switch before installation with a simple and compact design and enables the construction of switching devices with different number of poles using one and the same units.
  • each snap switch carrier consists of an insulating strip on one side of which the snap switch is attached and on the other side the external connections are located, in such a way that one or more snap switches are modular for optional construction of a single or multi-pole switching device can be connected to the housing. Due to this design, the individual snap switch unit does not require a special, prefabricated housing, but the switch elements of the respective snap switch remain freely accessible until the snap switch is installed in the temperature switching device. Only then does the insulating strip form an essentially closed receptacle for the snap switch or its switch elements in such a way that they are then protected.
  • the receptacles for the snap switches can be dimensioned relatively narrow because they do not need to accommodate a separate housing of the snap switch, so that the dimensions of the entire temperature switching device can be kept relatively small.
  • Another significant advantage of the solution according to the invention is that a large number of switch variants can be produced with just a few components, without increasing the overall outlay for a switch. With the same housing and actuation mechanism, a single-pole or multi-pole switch can be manufactured with just one snap switch module type. This results in large series for the individual parts, in which they can be manufactured extremely profitably and with a minimum of rejects.
  • an insert preferably made of insulating material, is arranged on the housing and has on its outward-facing side the channel-like or box-like receptacles into which the insulating strips come from the outside can be used that the respective snap switch is in a channel or box-like receptacle and the insulating strip closes the receptacle to the outside.
  • the housing on the associated side is relatively large and insulated, and at the same time each receptacle forms an externally closed space for the snap switch after the insulating strip has been inserted.
  • each insulating strip forms a narrow, elongated assembly with the snap switch mounted on one side, several of which are to be arranged in parallel in the receptacles in such a way that the respective insulating strip closes the associated receptacle to the outside and the snap switch in this recording is shielded from the outside.
  • the housing therefore only needs to be a cup-shaped sheet metal part, the open side of which is closed on the one hand by the insert and on the other hand by the insulating strips. This is further improved if the insulating strips can be inserted into the housing such that the insulating strips lying next to one another at least partially enclose the housing on one side.
  • a very simple fastening of the respective snap switch which is completely independent of further snap switches, is obtained if the respective insulating strip can be fastened with tabs of the housing consisting of sheet metal, which preferably engage in slots at the ends of the insulating strip, so that a very precise alignment of the respective snap switch compared to the housing and the transmission mechanism is achieved.
  • the actuating element is arranged on the housing as an exchangeable unit, which preferably has the expansion member on an exchangeable transmission lever.
  • the lever can be plate-shaped and at least one, possibly adjustable, transfer pressure piece for acting on a snap switch can be attached to it in addition to the expansion member, the actuating element preferably being arranged by an axis supporting the lever, which in turn is in the walls of the Housing is mounted, is interchangeably attached to the housing.
  • each transmission pressure piece in the form of a plunger can be attached to an individual spring tongue, which preferably belongs to a comb-like spring plate part arranged parallel to the lever, which is advantageously adjustable by means of an adjusting screw supported on the lever.
  • This arrangement creates an overload protection for the snap switch.
  • the force of the spring tongue is strong enough to ensure a play-free transmission of the movement of the expansion member via the transmission pressure piece to the snap switch, but can spring out when the snap switch is already actuated and the expansion member expands further, which is intended for multipole, is the case with snap switches that switch at different temperatures. It also allows the very advantageous arrangement of an adjusting screw.
  • the temperature switching device shown in Figures 1 and 2 is intended for use as a single or multi-pole, adjustable or fixed temperature controller, temperature limiter etc. It has a housing 12 in the form of a rectangular or square box made of sheet metal, in the bottom 13 of which an adjusting nut 14 is inserted. It is welded on Fixing tab 15 set. A section of an adjusting shaft 16, which is provided with an adjusting thread, is screwed into the adjusting nut, which at its outwardly projecting end has a flattened portion for the rotationally fixed reception of an adjusting button, not shown, and presses with its inner end onto a pressure surface 17 of an adjusting member in the form of an expansion member 18.
  • the expansion member 18 is a conventional membrane pressure can, which consists of two wave-shaped metal membranes welded together in the edge area, on one side of which the pressure surface 17 and on the other side a connector 19 is welded.
  • a capillary tube 20 leads into the connecting piece 19 and connects the expansion member 18 to a conventional temperature sensor, not shown, for example a boiler or tube sensor.
  • the cylindrical connecting piece 19 projects with a reduced-diameter fastening section 21 through an opening of a plate-shaped lever 22, which has a beveled edge for stiffening at two of its edges.
  • the expansion member 18 is fixed to the lever 22 with a quick release part 23.
  • the lever 22 is pivotable about an axis 24 which is mounted in the angled edge of the lever 22 and in two side walls 25 of the housing 12.
  • On the side facing the free end of the lever 22, the latter has three adjacent holes 26 through which pressure pieces 27 made of insulating material protrude. At their lower end in the figures, the pressure pieces 27 are set down and one spring tongue 28 each is received in corresponding recesses.
  • spring tongues 28 run on the side of the lever 22 facing the expansion member 18 parallel to the lever 22 and are riveted to the lever 22 in the vicinity of the axis 24.
  • An adjusting screw 29 is screwed into the free end of each spring tongue 28, which is supported on the lever 22 and by means of which the relative position of the spring tongue 28 with respect to the lever 22 can be adjusted.
  • the total of three mutually parallel spring tongues 28 are connected to one another at their riveted end, so that they protrude like a comb from the fastening end. They can also be stiffened by angling the edge over most of their position, with only the section shortly before their fastening end behaving like a hinge.
  • the expansion member 18, the lever 22 with the spring tongues 28 attached thereto and the pressure pieces 27 form a coherent unit, which is an actuating element 30, which is produced as a pre-adjusted separate unit and fastened to the housing 12 by inserting the axle 24 can be.
  • an insert 31 is suspended, which is supported with a flange on the side walls 25 of the housing 12 or can be fixed by inwardly directed sheet metal tabs of the housing.
  • the plastic insert 31 is relatively thin-walled and has a bottom 32 which closes the open side of the housing with the exception of three holes 34 for the pressure pieces 27 at a distance from the upper edge of the side walls 25.
  • the walls 35 running parallel to the side walls 25 and parallel intermediate walls 36 of the insert 31 delimit three elongated, mutually parallel channels or chambers of approximately square cross section, which form three receptacles 37 for the switches of the temperature switching device.
  • switches are designed as single snap switches 38 and attached to the underside of an insulating strip 40 which is provided as a snap switch base and is made of insulating material.
  • the insulating strips 40 are preferably made of a ceramic insulating material, for example steatite, but can also be made of plastic with lower thermal requirements. With the steatite version, the simple, strip-like version with only a flat recess in the middle offers special manufacturing advantages.
  • Each snap switch 38 has a rigid snap switch base 41 which is screwed onto the insulating strip 40 and at one end of which a snap spring 42 is fixed.
  • the power supply to the snap spring 42 also takes place via an external connection 43 in the form of a connecting tab which protrudes through a slot in the insulating strip, is bent at its inner end and supports the snap switch base 41.
  • a total of three external connections 43 are provided which protrude outward beyond the essentially flat outer surface 44 of each insulating strip 40.
  • the snap switch base 41 has, at its end remote from the attachment, a bent support bearing 45 for a spring tongue 46, which is part of the snap spring 42 and is supported in the support bearing under buckling prestress.
  • the free end of the snap spring 42 carries a contact 47 on each side, which can work alternately with two counter contacts 48, 49 in both switching positions.
  • the mating contacts 48, 49 are provided directly at the bent ends of the corresponding external connection 43 and fastened to the insulating strip 40 by rivets.
  • the insulating strip 40 thus forms, together with the snap switch 38 mounted thereon and the external connections 43, an independent switching unit which can be actuated by a pressure piece 27 which acts on an actuation pressure point 50.
  • This switching unit is to be attached to the housing 12 in that 40 slots 51 are provided on both ends of its insulating strip, project through the projecting sheet metal tabs 52 of the housing 12 and by twisting the notched end section 53 are captured.
  • Each insulating strip 40 thus preferably carries the external connections 43 belonging to its snap switch 38, so that each snap switch 38 is electrically self-sufficient and no electrical connections within the switch or between the individual snap switches 38 are necessary for the function of the respective snap switch 38 itself.
  • the insulating strip 40 closes one of the receptacles 37 to the outside, so that the snap switch 38 is protected in this chamber and is shielded from the outside. Due to the fact that it is independent of each other functional and connectable snap switch 38, all three snap switches 38 provided need not be installed. 1 that only two outer snap switches 38 are provided in the present exemplary embodiment, while the middle receptacle 37 is left free. No pressure piece 27 is used for these. A two-lane controller is thus created.
  • the temperature switching device thus consists of three units, namely on the one hand the housing 12 with the actuating means formed by the adjusting nut 14 and the adjusting screw 16 and the insert 31, then from the actuating element 30 with the expansion member 18 and through the lever 22, the pressure pieces 27 and the spring tongues 28 formed transmission means and finally from several, but basically in the same way and external connections 43. So it can. a few individual parts of some basic assemblies a large number of controller types can be manufactured according to specific customer requirements By reducing the number of parts and the modular system, not only can production and warehousing be significantly increased, but the quality can also be increased and the proportion of rejects reduced. For example, the switch assembly can be checked for functionality before the temperature switching device is assembled, and it is also possible to pre-adjust the burn group formed by the actuating element 30.
  • a temperature switching device IAa is shown to illustrate the possible variations, which is used as a non-self-resetting temperature limiter.
  • the housing has an adjusting screw 16a, which acts on the expansion member 18 and the temperature limiter to a constant one instead of an adjustable adjusting shaft Temperature.
  • the lever 22a directly carries the pressure pieces 27 and has an adjusting screw 55 at its end, via which it adjusts to a two-armed, spring-loaded lever 56.
  • actuating piece 57 which is designed to forcibly switch off the contact 47 of the snap spring when the lever 22a counteracts by an extreme contraction of the expansion socket in the event of a capillary tube break or a leak in the hydraulic system pivoted clockwise (arrow direction 58).
  • actuating piece 57 which is designed to forcibly switch off the contact 47 of the snap spring when the lever 22a counteracts by an extreme contraction of the expansion socket in the event of a capillary tube break or a leak in the hydraulic system pivoted clockwise (arrow direction 58).
  • a pressure actuating pin 59 which is cranked for reasons of space, the end of which brings the snap springs or the contact 47 back into the “on” position after the temperature limiter has responded via a transmission bar 60.
  • the snap switch is designed in this case so that it does not switch on again automatically after a single switch-off even when the temperature drops, but only after the actuation button 59 is pressed.
  • the switch module with the same structure of the insulating strip 40, differs only in that from that according to FIGS I and 2 that it has corresponding recesses for the transmission bar 60 and that it lacks the third external connection 43, since only an unconnected counter bearing is provided in its place. It can be seen here that three different modules are used that allow different combinations of temperature switching devices.
  • a single or multi-pole construction is also possible here, e.g. in the case of a single-pole controller, probably only the middle receptacle 37 would be occupied.
  • the housing can be formed next to one another for the arrangement of any number of snap switch bases.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermally Actuated Switches (AREA)

Claims (12)

1. Thermostat comprenant un boîtier (12) muni de logements (37) pour plusieurs interrupteurs à déclic (38), ainsi qu'un élément d'actionnement (30) devant être placé dans le boîtier (12) et englobant un organe de dilatation (18) et un mécanisme de transmission (22, 27, 28) afin d'agir sur l'interrupteur à déclic (38) considéré, l'interrupteur à déclic (38) considéré formant, avec un support isolant (40) d'interrupteur à déclic et des raccords extérieurs associés (43), une partie constitutive autonome et distincte pouvant être reliée au boîtier (12), caractérisé par le fait que chaque support d'interrupteur à déclic consiste en une barrette isolante (40) sur l'un des côtés de laquelle l'interrupteur à déclic (38) est installé et sur l'autre côté de laquelle les raccords extérieurs (43) sont disposés, de telle façon qu'un ou plusieurs interrupteurs à déclic (38) puissent être reliés modulairement au boîtier (12), afin de constituer sélectivement un appareil de commutation (11, 11a) à un ou plusieurs pôles.
2. Thermostat selon la revrndication 1, caractérisé par le fait que sur le boîtier (12) est disposée une pièce prisonnière (31) consistant de préférence en un matériau isolant qui comporte à sa face tournée vers l'extérieur les logements (37) en forme de rigoles ou de caissons, dans lesquels les barrettes isolantes (40) peuvent être insérées de l'extérieur d'une manière telle que l'interrupteur à déclic (38) considéré se trouve dans un logement (37) en forme de rigole ou de caisson et que la barrette isolante (40) ferme ce logement (37) vers l'extérieur.
3. Thermostat selon la revendication 1 ou 2, caractérisé par le fait que la face ouverte du boîtier (12) est obturée par la barrette isolante considérée (40) et/ou par la pièce prisonniére (31 ) qui est notamment suspendue dans le boîtier (12).
4. Thermostat selon l'une des revendications 1 à 3, caractérisé par le fait que chaque barrette isolante (40) forme, avec l'interrupteur à déclic (38) rapporté d'un côté, un groupe constitutif étroit s'étendant en longueur, dont plusieurs doivent être disposés en juxtaposition paralléle dans les logements (37) de telle sorte que la barrette isolante (40) considérée ferme le logement associé (37) vers l'extérieur et que l'interrupteur à déclic (38) soit à l'abri vers l'extérieur dans ce logement (37).
5. Thermostat selon l'une des revendications 1 à 4, caractérisé par le fait que les barrettes isolantes (40) peuvent être insérées dans le boîtier (12) de telle façon que les barrettes isolantes juxtaposées (40) entourent le boîtier (12) au moins partiellement d'un côté.
6. Thermostat selon l'une des revendications 1 à 5, caractérisé par le fait que la barrette isolante (40) considérée peut être fixée par des pattes (52) du boîtier (12) constitué en tôle qui s'engagent de préférence dans des fentes (51) aux extrémités de la barrette isolante (40).
7. Thermostat selon l'une des revendications 1 à 6, caractérisé par le fait que l'élément d'actionnement (30) est disposé sur le boîtier (12) en tant qu'unité interchangeable comportant, de préférence, l'organe de dilatation (18) sur un levier de transmission (22) interchangeable.
8. Thermostat selon la revendication 7, caractérisé par le fait que le levier (22, 22a) est en forme de plaque et sur lui est disposé, outre l'organe de dilatation (18), au moins un organe presseur de transmission (27) éventuellement réglable afin d'agir sur un interrupteur à déclic (38), l'élément d'actionnement (30) étant de préférence installé sur le boîtier (12), avec faculté de remplacement, par l'intermédiaire d'un axe (24) qui porte le levier (22, 22a) et est à son tour monté dans des parois (25) du boîtier (12).
9. Thermostat selon la revendication 8, caractérisé par le fait que chaque organe presseur de transmission (27) est implanté sur une languette élastique (28) qui fait de préférence partie d'une piéce en tôle élastique en forme de peigne disposée parallélement au levier (22) et qui peut être avantageusement réglée par l'intermédiaire d'une vis d'ajustement (29) prenant appui sur le levier (22).
10. Thermostat selon l'une des revendications 1 à 9, caractérisé par le fait qu'un arbre (16) de réglage d'un régulateur de température, agissant sur l'organe de dilatation (18), est disposé sur le boîtier (12).
11. Thermostat selon l'une des revendications 1 à 9, caractérisé par le fait qu'un organe de rappel (59) est monté sur le boîtier (12) en vue de commuter le thermostat réalisé sous la forme d'un interrupteur de sécurité.
12. Thermostat selon l'une des revendications 1 à 11, caractérisé par le fait qu'il est prévu un levier de démultiplication (56), qui provoque une commutation de l'interrupteur à déclic (38) en cas de contraction extrême de l'organe de dilatation (18), résultant d'un défaut d'étanchéité du système (18, 20) de détection de température fonctionnant hydrauliquement.
EP83110198A 1982-10-21 1983-10-13 Thermostat Expired EP0107152B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83110198T ATE20404T1 (de) 1982-10-21 1983-10-13 Temperaturschaltgeraet.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3238955 1982-10-21
DE19823238955 DE3238955A1 (de) 1982-10-21 1982-10-21 Temperaturschaltgeraet
US06/547,787 US4565989A (en) 1982-10-21 1983-11-02 Temperature control apparatus

Publications (2)

Publication Number Publication Date
EP0107152A1 EP0107152A1 (fr) 1984-05-02
EP0107152B1 true EP0107152B1 (fr) 1986-06-11

Family

ID=25805248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110198A Expired EP0107152B1 (fr) 1982-10-21 1983-10-13 Thermostat

Country Status (6)

Country Link
US (1) US4565989A (fr)
EP (1) EP0107152B1 (fr)
JP (1) JPS5991623A (fr)
AU (1) AU566546B2 (fr)
CA (1) CA1203276A (fr)
DE (1) DE3238955A1 (fr)

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CN108231484A (zh) * 2017-12-29 2018-06-29 合肥和旭继电科技有限公司 一种基于气压传动的继电器

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CN103441035B (zh) * 2013-08-25 2015-07-15 何兆来 无源可调温度控制开关
CN106092347B (zh) * 2014-05-30 2019-05-24 佛山市川东磁电股份有限公司 一种多重保护的温度传感器的制作方法
CN108231483A (zh) * 2017-12-29 2018-06-29 合肥和旭继电科技有限公司 一种基于液压传动的三轮继电器
CN108172472B (zh) * 2017-12-29 2020-01-17 合肥和旭继电科技有限公司 一种传动平稳的大功率继电器
CN107958814B (zh) * 2017-12-29 2019-09-06 合肥和旭继电科技有限公司 一种基于液压传动的集成继电器

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Publication number Priority date Publication date Assignee Title
CN108231484A (zh) * 2017-12-29 2018-06-29 合肥和旭继电科技有限公司 一种基于气压传动的继电器

Also Published As

Publication number Publication date
JPS5991623A (ja) 1984-05-26
DE3238955A1 (de) 1984-04-26
AU566546B2 (en) 1987-10-22
EP0107152A1 (fr) 1984-05-02
US4565989A (en) 1986-01-21
AU2045783A (en) 1984-05-03
CA1203276A (fr) 1986-04-15

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