Air-proportionality type water heater

Abstract

An air-proportionality type water heater is provided. Since the air-proportionality type water heater directly controls a current proportionality gas valve according to an amount of air by using a low-price AC air blower, a low-price current proportionality gas valve and a low-price airflow sensor, a gas supply amount can be adjusted with respect to all ranges of the airflow amount. Also, an appropriate calorie required for proportionally controlling a present hot water temperature to a set temperature, can be supplied. The water heater can be safely ignited to perform a combustion operation under the optimal condition although abnormal weathers and conditions. Accordingly, since a combustion performance is enhanced, combustion efficiency is high and a fuel cost can be saved.

What is claimed is:  
     
         1 . An air-proportionality type water heater for controlling an amount of fuel to be supplied according to an amount of inhaled air, the air-proportionality type water heater comprising: 
 an AC air blower for inhaling air via an inhalation air duct;    an airflow sensor installed in an inhalation chamber, for measuring an amount of air to be inhaled by the AC air blower;    a current proportionality gas valve for adjusting an amount of gas to be supplied; and    a controller for controlling a rotational speed (round per minute; RPM) of the AC air blower according to a calorie and the current proportionality gas valve according to the airflow amount measured in the airflow sensor.