Device for opening and closing a passage orifice present in a housing

Abstract

A device for opening and closing a passage orifice provided in a housing, the housing having a supply duct leading to the passage orifice and a discharge duct following the passage orifice, with a closing body which opens and closes the passage orifice and determines the throughflow quantity of a heating medium which is provided for heating a medium which surrounds the device, the closing body being activated by an actuation element which comprises a thermal head having a space filled with a gaseous medium and closed by means of a diaphragm.

1 . Device for opening and closing a passage orifice provided in a housing, said housing having a supply duct leading to the passage orifice and a discharge duct following the passage orifice, with a closing body which opens and closes the passage orifice and determines the throughflow quantity of a heating medium which is provided for heating a medium which at least partially surrounds the device, characterized in that the closing body is activated by an actuation element comprising a thermal head having a space filled with gaseous medium and closed by means of a diaphragm.  
   
   
       2 . Device according to  claim 1 , characterized in that the closing body is provided, in the direction of the flow of the heating medium, in a regulating space which follows the passage orifice and from which the discharge duct branches off.  
   
   
       3 . Device according to  claim 1 , characterized in that the closing body has a guide portion which is received by a housing portion of the thermal head and the closing body is guided perpendicularly to the diaphragm.  
   
   
       4 . (canceled)  
   
   
       5 . Device according to  claim 1 , characterized in that the closing body has an end face which points towards the diaphragm and the size of which comprises at least one third of the diaphragm face.  
   
   
       6 . Device according to  claim 1 , characterized in that the closing body has a shoulder which delimits the guide portion and which engages behind the housing portion receiving the guide portion.  
   
   
       7 . Device according to  claim 1 , characterized in that the closing body has an annular element in a region between the discharge duct and the housing portion of the thermal head, the said housing portion having the guide portion.  
   
   
       8 . (canceled)  
   
   
       9 . Device according to  claim 1 , characterized in that the housing of the thermal head is positioned with respect to the regulating space, at least one sealing element being interposed on the housing.  
   
   
       10 . Device according to  claim 1 , characterized in that the closing body has a closing face which points towards the passage orifice and which bears against the shoulder and forms a valve seat on the supply duct and the closing face and the valve seat are of stepped or conical design or are designed as a ball valve.  
   
   
       11 . (canceled)  
   
   
       12 . Device according to  claim 1 , characterized in that the closing body is of one-part design and has a guide portion and a shoulder delimiting the latter and, opposite, a closing face pointing towards the passage orifice and the closing body, has, between the guide portion and the closing face a reception portion which receives a regulating element.  
   
   
       13 . (canceled)  
   
   
       14 . Device according to  claim 1 , characterized in that the closing body has, on an end face pointing towards the passage orifice, a reception portion, an annular groove, which is provided for receiving a regulating element which is arranged in a chamber of the supply duct.  
   
   
       15 - 16 . (canceled)  
   
   
       17 . Device according to  claim 1 , characterized in that at least the diaphragm, the gaseous medium or the regulating element is adapted to the heating temperature of the medium surrounding the thermal head  
   
   
       18 . Device according to  claim 1 , characterized in that the closing body is produced from a material as ceramic, plastic or a composite plastic material having a low thermal conductivity.  
   
   
       19 . Device according to  claim 1 , characterized in that the housing is produced from a material as ceramic, from plastic as an injection moulding or from a composite plastic material having a low thermal conductivity.  
   
   
       20 . Device according to  claim 19 , characterized in that connecting elements for mounting the supply and discharge line of the heating medium are injection-moulded on the housing.  
   
   
       21 . Device according to  claim 1 , characterized in that the housing is produced from a thermally conductive material and is designed as a heating body.  
   
   
       22 . Device according to  claim 1 , characterized in that the closing face or the shoulder has an elevation for forming a valve seat, the said elevation bearing, opposite, against a shoulder or closing face and the shoulder or closing face opposite the elevation is designed as a planar bearing face, as a bearing face designed at least partially congruently to the elevation or as a bearing face designed at least partially identically or similarly to the elevation.  
   
   
       23 - 24 . (canceled)  
   
   
       25 . Device according to  claim 22 , characterized in that the elevation is of V-shaped design, as seen in cross section, and its lateral flanks are arranged at an angle of 30° to 160°.  
   
   
       26 . Device according to  claim 22 , characterized in that a portion pointing towards the closing face or shoulder on the elevation has a rounding with a radius of 0.1 mm to 10 mm, a curved face, a semicircular or quarter-circle face or a planar face.  
   
   
       27 . Device according to  claim 1 , characterized in that the shoulder or the closing face of the closing body has a rounding which, in a closing position bears against a complementarily designed closing face or shoulder or against a wedge-shaped or tapered closing face or shoulder.