Water level detecting device for an ice-making machine

Abstract

A water level detecting device for an ice-making machine includes a transparent tube, a float set in said transparent tube, an infrared ray emitter and an infrared-ray receiver respectively installed in a line at opposite sides of said transparent tube connected to a water tube connected to a water tank. When the float falls down together with the water level in the transparent tube going down with that of the water tank, and positions between the infrared-ray emitter and the receiver, a pump supplying water to an ice making unit is to be stopped by the interruption of the function of the infrared-ray emitter and the receiver. Thus the pump is automatically stopped in case of the water in the tank becoming insufficient, impossible to work idle.

What is claimed is: 
     
         1 . A water level detecting device for an ice-making machine, said device comprising:
 a machine body provided with a water tank in the lower interior, said water tank having its bottom bored with a water outlet, said water outlet connected with a water tube and a water pump, said water tube having its intermediate section connected with a branch water tube, said water pump having one side combined with a connecting tube, said connecting tube having its upper end connected with a feed water tube, said machine body having its upper side disposed with an ice-making unit, said ice-making unit composed of a water container and an ice-making apparatus; and   said water level detecting device assembled on said branch water tube and provided with a vertical transparent tube, said transparent tube provided with a float in its interior, said transparent tube having one side disposed with an infrared-ray emitter and the other side disposed with an infrared-ray receiver.   
     
     
         2 . The water level detecting device for an ice-making machine as claimed in  claim 1 , therein an icebox is provided above said water tank of said machine body. 
     
     
         3 . The water level detecting device for an ice-making machine as claimed in  claim 1 , wherein said transparent tube has its upper end connected with an exhaust tube.