High-frequency heating apparatus equipped with oven hood

Abstract

An apparatus includes a cam 3, a lever 8, a switch 10, a spring 9 and fire detection means 15. Utilizing an interlocking movement and an operation of the switch, a motor 2 is driven under a microcomputer control 23, and by doing so, the automatic opening and closing movement of a cover 1 can be effected smoothly and stably. Even when a fire occurs at a cooking device 13 below the apparatus, the fire detection means 15 stops the operation of a circulating fan 11, and also stops the cover 1 in an open condition, and by doing so, the spreading of the fire can be limited to a minimum, and also an abnormality in the opening and closing of the cover 1 can be indicated at a display portion 23, and therefore the safety, the durability and the degree of satisfaction of customers can be enhanced.

1 . An oven hood-equipped high-frequency heating apparatus, said apparatus comprising: 
 an opening for exhaust or intake purposes;    a cover for covering said opening;    a heating compartment for receiving a stuff to be heated;    heating means for heating the stuff to be heated;    cooling means for cooling said heating means;    opening/closing means for opening and closing said cover by driving a motor;    control means for controlling the driving of the motor; and    an apparatus operating condition display portion that provides an indication of an abnormality in the opening/closing means of said cover when said cover is forcibly closed by an external factor during operation of said heating means.    
   
   
       2 . The apparatus of  claim 1 , wherein said stop means comprises an ON/OFF switch mechanism.  
   
   
       3 . The apparatus of  claim 2 , wherein when said cover is forcibly closed by the external factor, said switch is turned into the OFF state, thereby stopping the operation of said heating means or controlling said heating means so as to control a heating output.  
   
   
       4 . The apparatus of  claim 1  or  claim 2 , further comprising a circulating fan for discharging air taken from an intake opening.  
   
   
       5 . The apparatus of  claim 4 , wherein the apparatus operating condition display portion further provides an indication of an abnormality in the opening/closing means of said cover when said cover is forcibly closed by an external factor during operation of said circulating fan.  
   
   
       6 . The apparatus of  claim 4 , wherein said opening/closing means includes a cam mounted on a motor drive shaft so as to open said cover and a lever for opening and closing said cover in association with the rotation of said cam.  
   
   
       7 . The apparatus of  claim 1 , wherein when said cover is forcibly closed by an external factor during operation of said heating means, said heating means controls its heating output to ensure continuous operation of said heating means.  
   
   
       8 . The apparatus of  claim 1 , wherein when said cover is forcibly closed by an external factor during operation of said heating means, said heating means decreases its heating output to ensure continuous operation of said heating means despite a lowered cooling ability.