FR2645343A1 - SYSTEM FOR FIXING A THERMOSTAT BULB CONNECTION FOR A SPEAKER SUCH AS IN PARTICULAR OVENS - Google Patents

Abstract

System for quick and tight fixing of the connection on the regulation or safety thermostat sensor for an enclosure such as in particular a heater, oven and the like, characterized in that the sensor bulb 10 of the thermostat is provided with a threaded part 12 on which engages a corresponding threaded connector 14 ensuring the positioning, fixing and tightening of the sensor bulb on a wall 20 of said enclosure with creation of a seal and an electrical grounding.

Description

The present invention relates to a rapid fixing system and

  waterproof of a bulb-sensor connection of a regulation or safety thermostat for an enclosure such as in particular a heating appliance and more

  particularly baking oven for example microwave oven.

  We know that in such enclosures and in particular in a micro-

  One or more thermostats for regulating the temperature of the oven are used, the sensor bulb of which is fixed to the wall of the oven by means of a connector, this fixing having to be precise enough for the sensor bulb to occupy

  a determined position inside the oven. At the moment the bulb-

  sensor is attached to the fitting by brazing which is a relatively expensive and impractical method of attachment since the replacement of the thermostat requires relatively long and complicated handling. The present invention proposes to provide a new method of fixing a bulb-sensor thermostat fitting which does not have the drawbacks of the solutions.

classics mentioned above.

  Consequently, the subject of this invention is a system for rapid and leaktight fixing of a bulb-sensor connection for a regulation or safety thermostat for an enclosure such as in particular a heating appliance, oven and the like, characterized in that the bulb of the thermostat is provided with a threaded part on which engages a corresponding threaded connection ensuring the positioning, the fixing and the tightening of the bulb-sensor of the thermostat on a wall of said enclosure with creation of a sealing and a setting electrical ground. According to an exemplary embodiment of the fixing system object of the invention there is provided a system of Joints on the one hand on the threaded connection and on the other hand on the sensor-bulb of the thermostat so as to ensure the seal

  of the fixing system in relation to the external atmosphere.

  According to the present invention, the fixing system as defined above.

  above applies more particularly to the mounting of sensor bulbs of thermostats in baking ovens, combi-cookers with microwaves and with conventional heating by resistances and the like, the assembly of threaded bulb-sensor, threaded connection and wall receiving the fixing system avoiding any external radiation from the microwaves, allowing precise positioning of the thermostats inside the oven and reducing interference

internal electromagnetic field.

2-645343

  Other features and advantages of the present invention

  will emerge from the description given below with reference to the attached drawing which

  illustrates various examples of embodiment devoid of any limiting nature.

  In the drawing: - Figure 1 is a plan view and in partial section of a first embodiment of the fastening system of a bulb-sensor thermostat fitting according to the present invention and; - Figures 2 and 3 are partial elevation views (right part) and vertical section (left part) of variants of the threaded connection

  forming part of the fixing system illustrated in FIG. 1.

  In the drawing, and in particular in FIG. 1, there is shown at 10 the sensor of a thermostat provided with its capillary tube 22. This sensor bulb 10 must be mounted inside the enclosure of an oven, for example a microwave oven whose wall 20 has been shown schematically on the

drawing.

  The sensor bulb 10 of the thermostat is provided with a threaded portion 12 on which a corresponding thread 16 must be engaged provided on the bore of a threaded connection 14. This threaded connection 14 has an external portion 19

  also threaded for engagement with nut 18.

  As we understand by examining Figure I the placement of the bulb-

  thermostat sensor on the wall 20 of the oven is carried out as follows: We start by screwing the threaded connector 14 on the corresponding threaded part 12 of the bulb 10 then engaging the externally threaded part 19 of the connector 14 through the opening 26 provided in the wall at the location of the attachment of the sensor bulb and finally the nut 18 is screwed, previously threaded on the end of the sensor bulb 10, on the part

  19 of the threaded connection 14.

  In order to ensure the tightness of the fixing device with respect to the external environment, the invention provides a system of seals. This system can comprise on the one hand an O-ring such as 24 interposed between the threaded connection 14 and the external face of the wall 20 as shown in FIG. 1 and on the other hand another seal placed inside the oven on the sensor bulb so as to ensure the seal between this sensor bulb and the threaded connection

14 on which it is fixed.

  In the exemplary embodiment illustrated in FIGS. 1 and 2 the threaded connection 14 is of the hexagonal type and in the exemplary embodiment illustrated in FIG. 3 this threaded connection 14 ′ has a cylindrical external profile. Figures 2 and 3 clearly show how the sensor 10 is attached

  in the threaded connection 14, or 14 ', thanks to its threaded part 12.

  From reading the above description, it will be understood that the invention

  provides an inexpensive and easy-to-use method of attaching a bulb-sensor connection to a thermostat, while allowing standard or complex exchange of the thermostat without complicated or costly manipulation. Furthermore, the system which is the subject of the invention makes it possible to obtain a precise positioning of the sensor bulb inside the oven as well as a correct tightening on a wall of the latter with the creation of a seal and a setting. to the electrical ground. The sensor bulb thus bathes in the medium, the temperature of which is to be controlled, more particularly in baking ovens, microwave and conventional combi stoves with electrical heating, or the like, the fixing system described above constituted by the threaded bulb 10, 12, the connector 14 or 14 'and the wall 20 of the oven avoiding any external radiation from the microwaves, making it possible to achieve a precise position inside the oven and

  reducing disturbances in the internal electromagnetic field.

  It remains to be understood that the present invention is not limited to the embodiments described and shown here but that it encompasses all of them.

variants.

DREAM] DICATIOIS

  1. Quick and tight fixing system for the connection the regulation or safety thermostat sensor for an enclosure such as notamme = nt heater, oven and the like characterized in that the sensor bulb (10) of the thermostat is provided with a threaded part (12) on which engages a corresponding threaded connection (14) ensuring the positioning, the fixing and the tightening of the sensor bulb on a wall (20) of said enclosure with creation

  sealing and electrical grounding.

  2. Fastening system according to claim 1 characterized in that there is provided a system of seals (24) on the threaded connection (14) and on the sensor-bulb (10) of the thermostat, so as to ensure sealing of the system

  fixation in relation to the outside atmosphere.

  3. Fastening system according to one of claims 1 or 2 characterized

  in that it is applied to the mounting of a thermostat sensor bulb in baking ovens, mixed microwaves and conventionally heated by electric resistors, and the like, the entire fixing system comprising the bulb - threaded sensor (10, 12) the corresponding threaded connection - (14) and the wall <20) of the oven avoiding any external radiation from the microwaves, making it possible to obtain a precise positioning of the thermostat inside the oven

  and reducing the disturbances of the internal electromagnetic field.