초록 ▼

A plurality of movable dampers (23), (26), (31) are provided in an air flow duct (12) to control the temperature and air flow therethrough. A heater core (19) and/or air conditioner evaporator (18) are disposed in the duct (12). The dampers (23), (26), (31) are positioned by vacuum actuators (28), (

A plurality of movable dampers (23), (26), (31) are provided in an air flow duct (12) to control the temperature and air flow therethrough. A heater core (19) and/or air conditioner evaporator (18) are disposed in the duct (12). The dampers (23), (26), (31) are positioned by vacuum actuators (28), (29), (33) in accordance with applied vacuum. Sensors (47), (48), (49) sense the temperature in the duct (12), an automobile passenger compartment into which the duct (12) leads and the like. A control means unit (44) modulates vacuum from a source (34) in accordance with sensed temperature so as to maintain the temperature at a desired value. In case of failure of the automatic control unit (44), a manual valve unit (51), (53), (56) may be operated to connect the actuators (28), (29), (31) either to the vacuum source (34) or to the atmosphere so as to position the dampers (23), (26), (31) minimum or maximum temperature operation respectively.

대표청구항 ▼

An air conditioning apparatus having an air flow duct, a movable damper for controlling air flow through the duct, a heater core for heating the air in the duct, an evaporator for cooling the air in the duct, an actuator for positioning the damper in accordance with fluid pressure applied to the act

An air conditioning apparatus having an air flow duct, a movable damper for controlling air flow through the duct, a heater core for heating the air in the duct, an evaporator for cooling the air in the duct, an actuator for positioning the damper in accordance with fluid pressure applied to the actuator, a fluid pressure source and a fluid pressure modulator for modulating fluid pressure from the source, the combination therewith comprising valve means for selectively connecting the actuator to the modulator, the source or the atmosphere; sensor means for sensing a temperature inside the passenger compartment, the modulator modulating the fluid pressure in accordance with an output of the sensor means; control means connected to the sensor means and temperature setting means for setting a desired temperature into the control means, the control means controlling the modulator to modulate the fluid pressure in such a manner that the temperature inside the passenger compartment equals the desired temperature; the valve means being controlled by the temperature setting means; the temperature setting means comprising a movable member which is movable from a minimum temperature setting through an automatic temperature control range to a maximum temperature setting, the valve means being controlled by the movable member to connect the actuator to one of the source or the atmosphere when the movable member is at the minimum temperature setting, to the modulator when the movable member is in the automatic temperature control range and to the other of the source or the atmosphere when the movable member is at the maximum temperature setting.