WO2008028629A1 - Élément de travail thermostatique - Google Patents

Élément de travail thermostatique Download PDF

Info

Publication number
WO2008028629A1
WO2008028629A1 PCT/EP2007/007715 EP2007007715W WO2008028629A1 WO 2008028629 A1 WO2008028629 A1 WO 2008028629A1 EP 2007007715 W EP2007007715 W EP 2007007715W WO 2008028629 A1 WO2008028629 A1 WO 2008028629A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
interior
working
guide
element according
Prior art date
Application number
PCT/EP2007/007715
Other languages
German (de)
English (en)
Inventor
Eike Willers
Original Assignee
Behr Thermot-Tronik 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 Behr Thermot-Tronik Gmbh filed Critical Behr Thermot-Tronik Gmbh
Publication of WO2008028629A1 publication Critical patent/WO2008028629A1/fr

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
    • G05D23/1921—Control of temperature characterised by the use of electric means characterised by the type of controller using a thermal motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like

Definitions

  • the invention relates to a thermostatic working element with a housing whose interior, which serves to receive expansion material, is closed with a guide part to the outside, in which a working piston is arranged in an axial guide.
  • a bag-like element made of elastic material is provided, which is held between the guide part and the housing and which projects into the interior of the housing.
  • this bag-like element of the working piston is inserted, which preferably has a conical shape in this area.
  • the invention has for its object to provide a simply constructed thermostatic working element of the type mentioned that has the shortest possible response time.
  • This object is achieved in that in the axial guide, which is open to the interior of the housing, a seal is provided to the outside and that the guide part has a projecting into the interior of the housing, preferably extending to near the bottom of the housing extending approach containing the axial guidance. Due to this design, it is possible to reduce the amount of expanding matter received in the interior of the housing. This ensures that the expansion material assumes temperature changes relatively quickly, ie that the thermostatic working element reacts quickly.
  • This thermostatic working element dispenses with a membrane-like or bag-like sealing element which is elastically deformed during the working movement of the working piston.
  • the working piston must also take over no sealing function, so that its dimensions and the dimension of the axial guide are relatively uncritical.
  • the Dichtungspfropfen consists of a lubricious plastic. Suitable plastics have proven, as they are known under the brands Teflon or Viton.
  • the axial guide is open with a reduced diameter portion to the interior of the housing.
  • This reduced section serves in particular as an assembly aid in the assembly of such a thermostatic working element.
  • the axial guide, the working piston and the Dichtungspfropfen have a diameter of less than 3mm.
  • Thermostatic working elements with such small dimensions of the working piston have hitherto been practically impossible to achieve in practice.
  • By means of a small-diameter working piston and Dichtungspfropfens it is possible to realize relatively large displacement paths even with a small amount of expanding material, in particular, the advantage of fast reaction time is given.
  • an electrical heating element is arranged in the interior of the housing, which is connected to electrical terminals which are passed through an insert forming the bottom of the housing.
  • the electric heating element has substantially the shape of a hollow cylinder and is arranged in the annular gap between the housing inner wall and the projection of the guide part.
  • the drawing shows an axial section through an inventive thermostatic working element.
  • the thermostatic working element shown in the drawing has a preferably made of a highly thermally conductive metal housing 10, the bottom of which is formed by an insert 11 of non-conductive material, in particular of a plastic material.
  • the insert 11, which is pressed into the housing 10, has an annular groove 12 which receives a ring seal 13, in particular an O-ring.
  • the interior 14 of the housing 10 serves to receive an expansion material, in particular a wax mixture.
  • This expansion material is designed so that it changes its volume depending on the temperature and, in particular, changes its state of aggregation at a set temperature.
  • the housing 10 is closed by means of a guide member 15 which has an axial bore 16 which serves to guide a working piston 17.
  • the working piston 17 is guided in the axial guide 16, without having to exert a sealing function to the interior 14 of the housing 10 out.
  • a sealing tion plug 18 arranged in the axial guide 16 on the side facing the interior 14 .
  • This Dichtungspfropfen 18 consists of a plastic with sliding properties against the guide member 15, which preferably consists of a metal.
  • the cylindrical sealing plug 18 is pressed into the axial bore 16 with an interference fit, preferably with a slight interference fit, which means that the sealing plug 18 has a slight excess with respect to the axial bore 16.
  • the Dichtungspfropfen 18 When pressed into the axial bore 16, its outer diameter is adapted to the inner diameter of the axial bore 16.
  • the Dichtungspfropfen 18 has a length which corresponds to at least three times its diameter.
  • At a temperature-induced expansion of the expansion of the Dichtungspfropfen 18 is extended together with the working piston.
  • working piston 17 and sealing plug 18 were again forced into the axial guide.
  • the guide member 15 is provided with a projection 20 which projects into the interior 14 of the housing 10 and which extends to the vicinity of the base 11 formed by the insert. This ensures that the volume of the interior 14 is relatively low and therefore the amount of expansion material to be accommodated therein.
  • the small amount of wax allows a reduction in the reaction time.
  • a seal is provided between the end of the housing 10 and the guide member, which is achieved by means of material deformation of the open end of the housing 10.
  • the edge of the housing 10 is only crimped to hold the guide member 15.
  • a sealing element is then used which has a sealing tion between the housing 10 and the guide member 15 causes.
  • the housing 10 is sealingly welded to the guide member or soldered sealingly.
  • an electrical heating element 21 is disposed in the interior 14 of the housing.
  • the heating element 21 has a cylindrical shape and is not anchored in detail in the insert 11.
  • electrical connection lines 22, 23 are laid to the heating element 21, which protrude as a plug element from the insert 11.
  • the heating element 21 has a hollow cylindrical shape and extends into the gap between the projection 20 of the guide member 15 and the inner wall of the housing 10. Thereby, the electric heating element extends practically over the entire area in which expansion material is located. It is thus possible to heat the expanding material very quickly, so that a high response speed is obtained.
  • the diameter of the axial bore 16 and the sealing plug 18 is correspondingly small. Despite the small amount of expansion material, a relatively large travel is obtained.
  • the diameter of the working piston and associated elements is not more than 3mm.
  • no electrical heating element is provided.
  • the housing 10 is integrally formed with a closed bottom, to which the projection 20 of the guide member 15 is brought relatively close.
  • a thermostatic working element can be, for example, within a conventional thermostatic valve for the Use regulation of the engine temperature of a motor vehicle.
  • a stud bolt is attached to the bottom of the housing 10, on which a short-circuit valve plate is guided.
  • the thermostatic working element with the electric heating element 21 can be advantageously used as a switch that switches quickly and, above all, noise-free.
  • the amount of expansion material and thus the switching time can be further reduced by the fact that between the projection 20 of the guide member 15 and the heating element 21, a ring or sleeve of insulating material, for example made of plastic, which covers the projection 20 in whole or in part and the space between approach 20 and heating element 21 fills.
  • the working piston 17 is sealed by means of one or more annular seals in the axial guide 16, so that the sealing plug 18 can be omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

Élément de travail thermostatique comprenant un boîtier (10) dont l'espace (14) intérieur, qui sert à recevoir un matériau expansible, est fermé vers l'extérieur par une pièce (15) de guidage dans laquelle un piston (17) de travail est disposé dans un guide (16) axial. Il est prévu de disposer dans la prolongation axiale du piston de travail un tampon (18) d'étanchéité, lequel se déplace conjointement avec le piston de travail et est guidé de manière étanche par son pourtour extérieur dans le guide (16) axial et que la pièce (15) de guidage présente un talon (20) qui pénètre dans l'espace (14) intérieur du boîtier (10) et s'étend jusqu'à proximité du fond du boîtier, lequel contient le guide (16) axial.
PCT/EP2007/007715 2006-09-07 2007-09-05 Élément de travail thermostatique WO2008028629A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006043005.0 2006-09-07
DE102006043005A DE102006043005A1 (de) 2006-09-07 2006-09-07 Thermostatisches Arbeitselement

Publications (1)

Publication Number Publication Date
WO2008028629A1 true WO2008028629A1 (fr) 2008-03-13

Family

ID=38736753

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/007715 WO2008028629A1 (fr) 2006-09-07 2007-09-05 Élément de travail thermostatique

Country Status (2)

Country Link
DE (1) DE102006043005A1 (fr)
WO (1) WO2008028629A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2956450A1 (fr) * 2010-02-12 2011-08-19 Airbus Operations Sas Actionneur thermique
WO2017194606A3 (fr) * 2016-05-12 2018-01-25 Stego-Holding Gmbh Dispositif de régulation de température, utilisation du dispositif, procédé de fabrication d'un boîtier et boîtier
USD846103S1 (en) 2016-05-12 2019-04-16 Stego-Holding Gmbh Regulator for a heating installation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013102742A1 (de) 2013-03-18 2014-09-18 Dbk David + Baader Gmbh Dehnstoffelement und Verfahren
DE102015212991A1 (de) * 2015-07-10 2017-01-12 Mahle International Gmbh Thermostatisches Arbeitselement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234793A (en) * 1962-05-14 1966-02-15 Antioch College Temperature responsive force transmitting device
US3266235A (en) * 1964-11-02 1966-08-16 Honeywell Inc Control apparatus
US4685651A (en) * 1983-10-11 1987-08-11 Dauphinoise Thomson Thermostatic control devices

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395580A (en) * 1965-05-13 1968-08-06 Yoshikaze Kuze Thermostat
US3427883A (en) * 1966-08-27 1969-02-18 Yoshikazu Kuze Thermostat
US3777495A (en) * 1971-02-10 1973-12-11 Y Kuze Thermal responsive power element
US5582138A (en) * 1995-03-17 1996-12-10 Standard-Thomson Corporation Electronically controlled engine cooling apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234793A (en) * 1962-05-14 1966-02-15 Antioch College Temperature responsive force transmitting device
US3266235A (en) * 1964-11-02 1966-08-16 Honeywell Inc Control apparatus
US4685651A (en) * 1983-10-11 1987-08-11 Dauphinoise Thomson Thermostatic control devices

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2956450A1 (fr) * 2010-02-12 2011-08-19 Airbus Operations Sas Actionneur thermique
EP2366898A3 (fr) * 2010-02-12 2017-01-18 Airbus Operations (S.A.S) Actionneur thermique
WO2017194606A3 (fr) * 2016-05-12 2018-01-25 Stego-Holding Gmbh Dispositif de régulation de température, utilisation du dispositif, procédé de fabrication d'un boîtier et boîtier
USD846103S1 (en) 2016-05-12 2019-04-16 Stego-Holding Gmbh Regulator for a heating installation
EP3588236A1 (fr) * 2016-05-12 2020-01-01 STEGO-Holding GmbH Boîtier pour un composant électronique, procédé de fabrication d'un tel boîtier et dispositif de régulation de la température doté d'un tel boîtier
US11378990B2 (en) 2016-05-12 2022-07-05 Stego-Holding Gmbh Temperature control device, use of said device, method for producing a housing and housing

Also Published As

Publication number Publication date
DE102006043005A1 (de) 2008-03-27

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