| 摘要 |
A gas supply apparatus is adapted for supplying gas to a respiratory mask or patient interface, and includes: a housing including a gas inlet, a gas outlet, and a gas flow path; a blower disposed within the gas flow path; a gas filter disposed within the gas flow path; a breath tubing for connecting to the respiratory mask or patient interface; a particle sensor operable to sense a particle concentration and to generate a concentration signal representative of the particle concentration; a signal processor operable to evaluate when the gas filter should be replaced or cleaned according to the concentration signal and to generate an output signal; and an indicator device generating an alarm signal in response to the output signal.
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