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HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...
The theory is to ensure that the lowest inspiratory pressure necessary to achieve the desired tidal volume is used. As a safety feature, the ventilator will not increase the pressure beyond a predetermined high pressure limit. This is usually tied to (but not the same as) the operator-set high pressure alarm setting.
The contacts of the pressure switch may be rated a few tenths of an ampere to around 15 amperes, with smaller ratings found on more sensitive switches. Often a pressure switch will operate a relay or other control device, but some types can directly control small electric motors or other loads.
Constant air volume (CAV) is a type of heating, ventilating, and air-conditioning system. In a simple CAV system, the supply air flow rate is constant, but the supply air temperature is varied to meet the thermal loads of a space. [1] Most CAV systems are small, and serve a single thermal zone.
Optimal - e.g. - PC-IMVoi, oi is the tag for Adaptive Support Ventilation (ASV), technically due only to minor safety algorithms, if not it would only be "optimal" but not "intelligent". [5] Dual - e.g. - VC-CMVd is the tag for CMV + pressure limited ventilation. Biovariable - PC-CSVb is the tag for Variable Pressure Support.
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