초록 ▼

Operation of an inhalation therapy heater is regulated under control of the temperature sensor for the flow medium to maintain a selected temperature level to which the flow medium is heated during a warm-up period. Operation of the heater is intermittantly interrupted under control of a heater temp

Operation of an inhalation therapy heater is regulated under control of the temperature sensor for the flow medium to maintain a selected temperature level to which the flow medium is heated during a warm-up period. Operation of the heater is intermittantly interrupted under control of a heater temperature sensor during the warm-up period to minimize temperature overshoot heating. A low temperature detector, disabled during the warm-up period, generates an alarm signal if the flow medium temperature remains below a lower limit at the end of the warm-up period.

대표청구항 ▼

A heating control system comprising, in combination: heater means for heating a flowing gas, said heater means including a heater block; temperature sensor means, downstream of said heater means, for sensing the temperature of said flowing gas and providing a sensor signal related thereto; temperatu

A heating control system comprising, in combination: heater means for heating a flowing gas, said heater means including a heater block; temperature sensor means, downstream of said heater means, for sensing the temperature of said flowing gas and providing a sensor signal related thereto; temperature probe means for sensing the temperature of said heater block and providing a probe signal related thereto; set means for selecting a desired temperature for said flowing gas and providing a set signal related thereto; control means, responsive and interconnected to said temperature sensor means, said temperature probe means, and said set means, for controlling the operation of said heater means; and display means for displaying the temperature of said flowing gas as sensed by said temperature sensor means downstream of said heater means; said control means defining a high temperature limit and a low temperature limit so as to establish a permissible temperature range, said control means disabling said heater means whenever said sensor signal indicates that the temperature of said flowing gas is outside said permissible temperature range; said control means defining a block temperature limit and disabling said heater means whenever said probe signal indicates that the temperature of said heater block exceeds said block temperature limit so as to substantially avoid a runaway condition; said control means monitoring said sensor signal and said set signal and enabling said heater means in a predetermined manner whenever said sensor signal indicates that the temperature of said flowing gas is below said desired temperature; said control means including warm-up means for intermittently enabling and disabling said heater means to substantially avoid overshooting said desired temperature for said flowing gas, said warm-up means being interconnected with and responsive to said set means and said temperature probe means, said warm-up means including a predetermined warm-up limit based upon said desired temperature of said set means, said warm-up means becoming operative when said probe signal indicates that the temperature of said heater block exceeds said warm-up limit.