Water feeding device of instantaneous heating type and control method thereof

Abstract

A water feeding device of instantaneous heating type electrically connected an external power source includes a water tank, a transparent pipe, a heating module, a contactless sensing module, and a control module. The transparent pipe is connected between the water tank and the heating module. The heating module converts electrical energy of the external power source to thermal energy. The contactless sensing module disposed at an outside of the transparent pipe includes a lighting unit and a light sensing unit. The lighting unit produces a light beam toward the transparent pipe. The light sensing unit disposed opposite to the lighting unit detects intensity of the light beam propagating through the transparent pipe to generate a detection signal accordingly. The control module electrically connected to the heating module and the contactless sensing module controls the heating module whether to continuously produce the thermal energy according to the detection signal.

What is claimed is: 
     
         1 . A water feeding device of instantaneous heating type, electrically connected to an external power source, comprising:
 a water tank;   a transparent pipe, one end thereof is connected to the water tank;   a heating module, connected to another one end of the transparent pipe, used to convert electrical energy of the external power source to thermal energy, and heat water flow injected from the water tank accordingly;   a contactless sensing module, disposed at an outside of the transparent pipe, comprising:
 a lighting unit, used to generate a light beam toward the transparent pipe; and 
 a light sensing unit, disposed opposite to the lighting unit, used to detect intensity of the light beam propagating through the transparent pipe to generate a first detection signal accordingly; and 
   a control module, electrically connected to the heating module and the contactless sensing module, used to receive the first detection signal, and control the heating module whether to continuously produce the thermal energy according to the first detection signal.   
     
     
         2 . The water feeding device of instantaneous heating type according to  claim 1 , wherein when the light beam propagate through the transparent pipe and the transparent pipe transmits the water flow, due to refraction of the light beam, the intensity of the light beam detected by the light sensing unit is larger than that while the transparent pipe does not transmit the water flow. 
     
     
         3 . The water feeding device of instantaneous heating type according to  claim 1 , wherein the water feeding device of instantaneous heating type further comprises a pump, the pump is connected to the other one end of the transparent pipe, the heating module, and the control module, the pump is controlled by the control module, and determines whether to continuously draw the water flow from the water tank to the heating module according a control signal generated by the control module. 
     
     
         4 . The water feeding device of instantaneous heating type according to  claim 3 , wherein the water feeding device of instantaneous heating type further comprises a water line sensing module, the water line sensing module is disposed in the water tank, electrically connected to the control module, and used to detect a water line of the water flow stored in the water tank to generate a second detection signal accordingly, such that the control module obtains water storage amount of the water tank through the second detection signal; when the water line sensing module detects the water line of the water tank is less than a predetermined threshold, the control module generates the control signal according to the second detection signal, and the control signal is used to indicate the pump to stop drawing the water flow from the water tank. 
     
     
         5 . The water feeding device of instantaneous heating type according to  claim 4 , wherein the water line sensing module comprises:
 an accommodation tube, a bottom side thereof is connected to the water tank, such that a water line of the accommodation tube varies with the water line of the water tank;   a magnetic floating body, disposed in the accommodation tube; and   a plurality of Hall sensors, alternately disposed on an outer wall of the accommodation tube, and electrically connected to the control module, wherein the Hall sensors generates the second signal according to a magnet filed variation due to a different position of the magnetic floating body in the accommodation tube.   
     
     
         6 . A control method used in a water feeding device of instantaneous heating type, the water feeding device of instantaneous heating type is electrically connected to an external power source, and has a water tank, a transparent pipe, and a heating module, wherein the transparent pipe is disposed between the water tank and the heating module, the heating module is used to converts electrical energy of the external power source to a thermal energy, and the control method comprises:
 generating a light beam toward the transparent pipe;   detecting intensity of the light beam propagating through the transparent pipe, and generating a first detection signal accordingly; and   controlling the heating module whether to continuously produce the thermal energy according to the first detection signal.   
     
     
         7 . The control method used in the water feeding device of instantaneous heating type according to  claim 6 , wherein when the light beam propagate through the transparent pipe and the transparent pipe transmits the water flow, due to refraction of the light beam, the intensity of the light beam detected by the light sensing unit is larger than that while the transparent pipe does not transmit the water flow. 
     
     
         8 . The control method used in the water feeding device of instantaneous heating type according to  claim 6 , wherein the water feeding device of instantaneous heating type further comprises a pump, the pump determines whether to continuously draw the water flow from the water tank to the heating module according to a control signal. 
     
     
         9 . The control method used in the water feeding device of instantaneous heating type according to  claim 8 , further comprising:
 detecting a water line of the water tank to generate a second detection signal accordingly, and when the water line sensing module detects the water line of the water tank is less than a predetermined threshold, controlling the pump to stop drawing the water flow from the water tank to the heating module.   
     
     
         10 . The control method used in the water feeding device of instantaneous heating type according to  claim 9 , wherein to detect the water line of the water tank, a magnetic floating body and a plurality of Hall sensors are used, the magnetic floating body has a different position corresponding to the water line of the water bank, and the Hall sensors are alternately disposed at different positions in the water tank, such that the second detection signal is generated according to the magnet field variation due to a different position of the magnetic floating body.