EP1766647A1 - Thermostat de régulation à dispositif de retenue - Google Patents
Thermostat de régulation à dispositif de retenueInfo
- Publication number
- EP1766647A1 EP1766647A1 EP05773019A EP05773019A EP1766647A1 EP 1766647 A1 EP1766647 A1 EP 1766647A1 EP 05773019 A EP05773019 A EP 05773019A EP 05773019 A EP05773019 A EP 05773019A EP 1766647 A1 EP1766647 A1 EP 1766647A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- probe
- slide
- safety
- thermostat according
- boss
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/60—Means for producing snap action
-
- 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
- H01H37/323—Thermally-sensitive members making use of shape memory materials
-
- 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
- H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
- H01H37/48—Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible rigid rods or tubes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/002—Thermally-actuated switches combined with protective means
Definitions
- the present invention relates to a regulation thermostat comprising a retaining device yielding under a determined force in order to create a rapid and abrupt opening movement of the safety device.
- a regulating thermostat consisting of a shape memory alloy spring allowing, during an abnormal rise in the temperature of the installation, to act on the switches switch ensuring the interruption of the electric current in the heating installation.
- the object of the present invention is to produce and improve the thermostat described either in patent EP 743666 or in patent FR2 735 278 by improving the safety device so that at least one of the safety switches opens quickly due to an abnormal increase in the installation temperature.
- the probe thermostat comprises, from a base closed by a housing, an electromechanical temperature regulation system consisting of a probe comprising a metal tube with a high coefficient of expansion, inside which is positioned a metal rod with low coefficient of expansion, a safety device allowing, during a rise in temperature exceeding that of the minimum thermal threshold of the safety device, the opening of the safety switches and a temporary restraint device with reset manual comprising a slide provided with a boss having on its external face a serrated profile intended to cooperate with an elastic clip integral with the base and having a free end in the shape of a beak whose profile is complementary to that serrated of the boss in order to transform the slow expansion movement of the safety device in a rough opening movement sque from at least one of the safety switches.
- the probe thermostat comprises a probe comprising, above the crimping of the metal rod with the tube, a peripheral groove forming an internal stop allowing the retention, inside the tube and between the latter and the metal rod, of the safety device made up of a shape memory alloy spring.
- the probe thermostat according to the present invention comprises a probe comprising a cylindrical spacer which is arranged between the tube and the rod. metal and one of its ends of which bears against the spring, while the other end bears against the slide made of insulating material.
- the probe thermostat comprises a slide which has in its middle a boss having on its external face a serrated profile intended to cooperate with an elastic clip secured to the base in order to produce the temporary retaining device for said slide.
- the probe thermostat comprises a slide comprising a horizontal wing secured to a boss having on its external face a serrated profile intended to cooperate with an elastic clip secured to the base in order to produce the device for temporarily retaining said slide.
- the probe thermostat according to the present invention comprises a boss, the serrated profile of which comprises a lower panel which is inclined at an angle ⁇ of between 25 and 35 degrees relative to a vertical axis xx '.
- the probe thermostat according to the present invention comprises an elastic clip having a free end in the shape of a beak whose profile is complementary to that serrated in the boss.
- the probe thermostat comprises a slide which comprises, from its center and in diametrically opposite directions, two wings each secured by a pusher extending vertically in planes parallel to that containing the axis of movement of the slide. and near the push button a reset finger which goes vertically towards the outside of the case.
- the probe thermostat comprises a safety device which consists of a shape memory alloy spring disposed in a housing provided in the base below the elastic blade of the safety switch, said housing being located at immediate proximity of the probe so that the safety device follows the evolution of the water temperature with a minimum thermal gradient.
- the probe thermostat comprises a slide comprising in the extension of the spring a pusher which comes into contact with the elastic blade of the switch, said slide being integral with a wing extending horizontally and comprising at its free end a second pusher directed vertically in order to cooperate with a reset device.
- FIG 1 is an exploded perspective view showing a thermostat with unipolar regulation and bipolar security provided with a retaining device according to the present invention.
- Figure 2 and 3 are sectional views illustrating the thermostat with unipolar regulation and bipolar security provided with a retaining device according to the present invention.
- FIG. 4 is a perspective view showing the thermostat with unipolar regulation and bipolar security and its safety device in the closed position.
- FIG. 5 is a perspective view illustrating the thermostat with unipolar regulation and bipolar security and its safety device in the open position.
- Figures 6 and 7 are sectional views showing in detail the retaining device of the thermostat with unipolar regulation and bipolar security according to the present invention.
- FIGS 8 to 10 are views showing a thermostat with unipolar regulation and unipolar security provided with a retaining device according to the present invention.
- FIGS. 1 to 7 show a thermostat with unipolar regulation and bipolar security 1 comprising a probe 2, a plinth 3 in plastic material on which is fixed a housing 13 in order to enclose a control mechanism 4 of the supply circuit. of a heating system of an electric water heater.
- the probe 2 comprises a tube 5 with a high coefficient of expansion which is secured to the base 3 inside a bore 6 opening out at the level of the control mechanism 4.
- a metal rod 7 with a low coefficient of expansion one end of which 8 is crimped to the tube 5, while the other end 9 cooperates with an adjustment member 10 consisting of a nut 11 and a nut cover 12 snapped onto the housing 13.
- the probe 2 comprises, above the crimping of the end 8 of the metal rod 7 with the tube 5, a narrowing of the external diameter of the latter constituting a peripheral groove 14.
- the latter forms an internal stop allowing the retention inside the tube 5 and between the latter and the metal rod 7 of a safety device consisting of a spring 15 made of shape memory alloy, of a cylindrical spacer 16 and a slide 17.
- the spring 15 comprises a series of spirals coming around the metal rod 7.
- the probe 2 comprises a cylindrical spacer 16 which is disposed between the tube 5 and the metal rod 7, one of its ends coming to bear against the spring 15, while the other end opens out inside the space delimited by the bore 6 allowing the tube 5 to be fixed on the base 3.
- a slide 17 made of insulating material such as plastic.
- the slide 17 is crossed by the metal rod 7 and can move back and forth vertically inside the bore 6 of the base 3.
- the slide 17 comprises in its middle a retaining device which consists of a boss 18 having on its external face a serrated profile 19 intended to cooperate with an elastic clip 20 secured to the base 3 in order to produce a device temporarily retaining the device of security.
- the elastic clip 20 has a free end in the shape of a beak 21, the profile of which is complementary to that of the serrated surface 19 of the boss 18.
- the serrated profile 19 has a lower panel 45 which is inclined at an angle ⁇ relative to a vertical axis xx 'parallel to or coincident with that of the tube 5 inside which the metal rod 7 is arranged.
- the angle of inclination ⁇ of the lower pan 45 is between 25 and 35 degrees ( Figures 6 and 7).
- the retaining device temporarily blocks the slide 17 in its vertical movements.
- the retaining device is designed to yield under predetermined and controlled force during the manufacture of the thermostat.
- the slide 17 comprises, from its middle and in diametrically opposite directions, two wings 22, 23 each secured to a pusher 24, 25 extending vertically in planes parallel to that containing the axis of movement of the slide 17
- At least one of the wings 22, 23 and more particularly 23 comprises, near its pusher 25, a reset finger 26 which moves vertically in the direction of the outside of the housing 13.
- the thermostat 1 comprises above the pushers 24, 25 of the slide 17 of the elastic and metallic blades 27, 28 belonging respectively to the safety switches 29, 30 of the control mechanism 4 of the supply circuit.
- Each safety switch 29, 30 is mounted on the corresponding supply phase of electric current to the resistance of a water heater or of a similar device, not shown.
- the ends of each elastic blade 27, 28 carry a contact 31, 32 adapted to cooperate with a fixed contact 33, 34 secured respectively to the connection terminals 35, 36 of the thermostat 1 (FIGS. 4 and 5).
- the thermostat 1 comprises an insulating amplifier lever 37 extended by an insulating finger 38 suitable for cooperating with a movable and elastic contact 39 cooperating with another connection terminal, not shown, of the thermostat 1.
- the amplifier lever 37 is crossed by the metal rod 7 with a low coefficient of expansion.
- FIGS. 8 to 10 show a thermostat with unipolar regulation and unipolar security 100 comprising, as described above for thermostat 1 a probe 2, a plinth 3 of plastic material on which is fixed a housing 13 in order to enclose a mechanism for control 4 of the supply circuit of a heating system of an electric water heater.
- the thermostat 100 differs from that described above in that it comprises a single safety switch 29 comprising an elastic and metallic blade 27 secured to a contact 31 intended to cooperate with a fixed contact 33 secured to a connection terminal of the thermostat 100.
- the thermostat 100 differs from that described above in that the safety device consists of a spring 15 of shape memory alloy disposed in a housing 40 formed in the base 3 below the elastic blade 27 of the switch security 29.
- the housing 40 is in the immediate vicinity of the probe 2 so that the safety device 15 follows the evolution of the water temperature with a minimum thermal gradient.
- the housing 40 is provided in a vertical direction and parallel to the bore 6 in which is subjected the tube 5 with a high coefficient of expansion of the probe 2.
- the housing 40 may optionally communicate with the bore 6.
- the safety device of the thermostat 100 comprises a slide 41 made of insulating material such as plastic which is guided in its back and forth movements vertically inside the base 3.
- the slide 41 is disposed between the elastic blade 27 of the electric breaker 29 and the spring 15.
- the slide 41 comprises, in the extension of the spring 15, a pusher 42 which comes into contact with the elastic blade 27.
- the slide 41 is integral with a wing 43 extending horizontally and comprising at its free end a second pusher 44 directed vertically in order to cooperate with a resetting device 50.
- the horizontal wing 43 of the slide 41 is secured in a vertical direction and opposite to that of the second pusher 44 of a retaining device which consists of a boss 18 having on its external face a serrated profile 19 intended to cooperate with a elastic clip 20 secured to the base 3 in order to produce a temporary retention device for the safety device.
- the elastic clip 20 has a free end in the shape of a beak 21, the profile of which is complementary to that of the serrated surface 19 of the boss 18.
- the serrated profile 19 has a lower panel 45 which is inclined at an angle ⁇ relative to a vertical axis xx 'parallel to or coincident with that of the tube 5 inside which the metal rod 7 is disposed.
- the angle d 'tilt ⁇ of the lower pan 45 is between 25 and 35 degrees ( Figures 7, 8).
- the retaining device temporarily blocks the slide 41 in its vertical movements. In fact, the retaining device is designed to yield under predetermined and controlled force during the manufacture of the thermostat.
- each thermostat 1, 100 is blocked by the retaining device and more particularly by its boss 18 whose serrated profile 19 cooperates with the spout 21 of the elastic clip 20.
- Temporary blocking of the slide 17, 41 makes it possible to compress the spring 15 until it reaches the predetermined breaking force of the elastic clip 20 required to disengage said slide.
- the temporary retention of the slide 17, 41 allows an accumulation of energy transforming the slow expansion movement of the spring 15 into a sudden opening movement of at least one of the safety breakers 29, 30 each comprising elastic blades 27, 28 integral with contacts 31, 32.
- the elastic clip 20 of the retaining device gives way under the force of the spring 15 to create a rapid and abrupt opening movement of at least one of the contacts 31, 32 according to the characteristics of the thermostat 1, 100
- the temporary retention system constituted by the boss 18 of the slide 17, 41 whose serrated profile 19 cooperates with the spout 21 of the elastic clip 20, makes it possible to cut off the power supply to the thermostat 1, 100 even in the case of low thermal inertia.
- the temporary retention system constituted by the boss 18 of the slide 17, 41 whose serrated profile 19 cooperates with the spout 21 of the elastic clip 20, makes it possible to prevent the spring 15 from retracting under the pressure of the blade (s) elastic 27, 28 when the temperature of the installation decreases.
- the safety breaker (s) 29, 30 remain open, which obliges the user to manually reset the thermostat 1, 100 by pressing the reset finger 26, 50 to constrain the spring 15 in its initial position. to allow the elastic blade or blades 27, 28 of the safety breaker (s) 29, 30 to come into contact in order to supply the heating resistor again.
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
- Electric Ovens (AREA)
- Display Devices Of Pinball Game Machines (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
- Temperature-Responsive Valves (AREA)
- Cookers (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0405670A FR2870985B1 (fr) | 2004-05-26 | 2004-05-26 | Thermostat de regulation a dispositif de retenue |
PCT/FR2005/001300 WO2005119720A1 (fr) | 2004-05-26 | 2005-05-26 | Thermostat de regulation a dispositif de retenue |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1766647A1 true EP1766647A1 (fr) | 2007-03-28 |
EP1766647B1 EP1766647B1 (fr) | 2008-08-20 |
Family
ID=34945146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05773019A Not-in-force EP1766647B1 (fr) | 2004-05-26 | 2005-05-26 | Thermostat de régulation à dispositif de retenue |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1766647B1 (fr) |
AT (1) | ATE405941T1 (fr) |
DE (1) | DE602005009193D1 (fr) |
FR (1) | FR2870985B1 (fr) |
WO (1) | WO2005119720A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2951861B1 (fr) * | 2009-10-27 | 2011-11-25 | Cotherm Sa | Thermostat hybride pour chauffe-eau electrique |
IT202200014128A1 (it) | 2022-07-04 | 2024-01-04 | Termoregolatori Campini Corel S P A | Termostato ad asta con sicurezza |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH112032A (de) * | 1924-08-29 | 1925-10-16 | Zbinden Emil | Kontaktvorrichtung an einer elektrischen Temperaturreguliereinrichtung. |
FR898738A (fr) * | 1943-06-07 | 1945-05-04 | Electro App | Dispositif pour la commande de contacts électriques par éléments thermo-sensibles |
FR2734400B1 (fr) * | 1995-05-19 | 1997-07-25 | Cotherm Sa | Thermostat de regulation comportant dans la sonde un dispositif de securite |
FR2735278B1 (fr) * | 1995-06-12 | 1997-08-29 | Cotherm Sa | Thermostat a sonde comportant dans le socle un ressort en alliage a memoire de forme |
-
2004
- 2004-05-26 FR FR0405670A patent/FR2870985B1/fr not_active Expired - Fee Related
-
2005
- 2005-05-26 AT AT05773019T patent/ATE405941T1/de not_active IP Right Cessation
- 2005-05-26 WO PCT/FR2005/001300 patent/WO2005119720A1/fr active IP Right Grant
- 2005-05-26 DE DE602005009193T patent/DE602005009193D1/de not_active Expired - Fee Related
- 2005-05-26 EP EP05773019A patent/EP1766647B1/fr not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2005119720A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2870985A1 (fr) | 2005-12-02 |
WO2005119720A1 (fr) | 2005-12-15 |
ATE405941T1 (de) | 2008-09-15 |
FR2870985B1 (fr) | 2007-05-18 |
EP1766647B1 (fr) | 2008-08-20 |
DE602005009193D1 (de) | 2008-10-02 |
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