Pneumatic control system
    2.
    发明授权
    Pneumatic control system 失效
    气动控制系统

    公开(公告)号:US3692240A

    公开(公告)日:1972-09-19

    申请号:US3692240D

    申请日:1970-07-24

    Applicant: HONEYWELL INC

    Abstract: A pneumatic control system for optimally controlling a condition in a plurality of zones, each zone having a thermostat or the like. Each thermostat is in communication and has proximately associated therewith valve means. The valve means are suitably interconnected and are in communication with a source of air pressure and output means, which output means provides a signal indicative of either the highest or the lowest of the output pressures of the thermostats.

    Pneumatic air-conditioning control system
    3.
    发明授权
    Pneumatic air-conditioning control system 失效
    气动空调控制系统

    公开(公告)号:US3578242A

    公开(公告)日:1971-05-11

    申请号:US3578242D

    申请日:1969-09-03

    Applicant: HONEYWELL INC

    Abstract: A pneumatic control system controlling sequentially operable valves, including a pressure-responsive pneumatic switch operable in response to the operation of the central fan or blower of the air-conditioning system. This switch connects the thermostat to the valves when the blower or fan is operating, connects a pressure reducing valve to the valves of the air-conditioning system when the fan is not operating, and provides a control pressure suitable for holding the valves in the desired position for nonoperation.

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