| 摘要 |
PURPOSE:To obtain the temperature control circuit capable of controlling a temperature within a constant range regardless of the degree of heat requirement by a method wherein a solenoid valve is utilized in this circuit to control the combustion amount of gas or kerosine. CONSTITUTION:In accompanied diagram, a set temperature is denoted by Ts, a temperature, one stage lower than Ts, is denoted by Ts-1 and the other temperature, further one stage lower than Ts-1, is denoted by Ts-2 while a temperature, one stage higher than the set temperature Ts, is denoted by Ts+1, and a temperature, at which temperature the combustion temperature is to be controlled, is refered to as Tp. When the Tp is to be increased, a strong combustion is continued as shown by numerass (1, 2, 3) in the diagram until Tp arises to a temperature near but slightly lower than the temperature Ts, then, a weak combustion is continued until the Tp arrives at Ts+1 as shown by numeral (4) in the diagram. When Tp decreases by the weak combustion, then, the strong combustion is effected again until it becomes lower than Ts-1 as shown by the numeral (6). When Tp has arrived at a temperature higher than Ts+1, the combustion is stopped as shown by the numeral (7). According to this method, Tp may be controlled within the range between Ts-1 and Ts+1 by repeating the strong and weak combustions or the weak combustion and the stoppage of the combustion. |
