Variable air volume ceiling diffuser
First Claim
1. A ceiling diffuser comprising:
- a. a diffuser hood with an air inlet for receiving warm or cool air from a duct and an air outlet for discharging the warm or cool air into an occupied space;
b. a base plate supported within the diffuser hood;
c. a damper stack extending between the base plate and the air inletd. a damper movably mounted on the damper stack for opening and closing the air inlet;
e. a supply temperature actuator for sensing the temperature of the warm or cool air received from the ductf. a room temperature actuator for sensing the temperature in the occupied space;
g. a linkage for moving the damper on the damper stack to open and close the air inlet, wherein the linkage has a heating mode and a cooling mode that are selected by the supply temperature actuator and wherein the linkage includes;
i. a heating slide alternatively engaged by the room temperature actuator;
ii. a cooling slide alternatively engaged by the room temperature actuator;
iii. a cam actuator alternatively driven by the heating slide and the cooling slide;
iv. a cam lift profile driven by the cam actuator that engages the damper to move the damper to open and close the air inlet,wherein the supply temperature actuator selects the heating slide for engagement with the room temperature actuator for the heating mode and wherein the supply temperature actuator selects the cooling slide for engagement with the room temperature actuator for the cooling mode and wherein the heating slide and cooling slide are free to slide with respect to each other.
1 Assignment
0 Petitions
Accused Products
Abstract
A variable air volume ceiling diffuser includes a damper that is raised and lowered by a linkage that is controlled by a duct temperature sensor/actuator and one or more room temperature sensors/actuators. The linkage includes a heating slide movable for the heating mode and a cooling slide movable for the cooling mode. The duct temperature sensor/actuator selects the heating slide for movement by the room temperature sensors/actuators in the heating mode and selects the cooling slide for movement by the room temperature sensors/actuators in the cooling mode. The differential movement between the heating and cooling slides moves a roller that engages a profiled cam surface attached to two lever arms. As the roller moves along the cam surface, the lever arms pivot about their axis of rotation so that the damper moves upward to close the air inlet and downward to open the air inlet.
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Citations
20 Claims
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1. A ceiling diffuser comprising:
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a. a diffuser hood with an air inlet for receiving warm or cool air from a duct and an air outlet for discharging the warm or cool air into an occupied space; b. a base plate supported within the diffuser hood; c. a damper stack extending between the base plate and the air inlet d. a damper movably mounted on the damper stack for opening and closing the air inlet; e. a supply temperature actuator for sensing the temperature of the warm or cool air received from the duct f. a room temperature actuator for sensing the temperature in the occupied space; g. a linkage for moving the damper on the damper stack to open and close the air inlet, wherein the linkage has a heating mode and a cooling mode that are selected by the supply temperature actuator and wherein the linkage includes; i. a heating slide alternatively engaged by the room temperature actuator; ii. a cooling slide alternatively engaged by the room temperature actuator; iii. a cam actuator alternatively driven by the heating slide and the cooling slide; iv. a cam lift profile driven by the cam actuator that engages the damper to move the damper to open and close the air inlet, wherein the supply temperature actuator selects the heating slide for engagement with the room temperature actuator for the heating mode and wherein the supply temperature actuator selects the cooling slide for engagement with the room temperature actuator for the cooling mode and wherein the heating slide and cooling slide are free to slide with respect to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A ceiling diffuser comprising:
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a. a diffuser hood with an air inlet for receiving warm or cool air from a duct and an air outlet for discharging the warm or cool air into an occupied space; b. a base plate supported within the diffuser hood; c. a damper stack extending between the base plate and the air inlet d. a damper movably mounted on the damper stack for opening and closing the air inlet; e. a supply temperature actuator for sensing the temperature of the warm or cool air received from the duct f. a room temperature actuator for sensing the temperature in the occupied space; g. a linkage for moving the damper on the damper stack to open and close the air inlet, wherein the linkage has a heating mode and a cooling mode that are selected by the supply temperature actuator and wherein the linkage includes; i. a heating mode slide alternatively engaged by the room temperature actuator; ii. a cooling mode slide alternatively engaged by the room temperature actuator; iii. a cam actuator connected to the heating mode slide and the cooling mode slide and responsive to differential movement between that the heating mode slide and the cooling mode slide; iv. a cam lift profile driven by the cam actuator that engages the damper to move the damper to open and close the air inlet wherein the supply temperature actuator selects the heating slide for engagement with the room temperature actuator for the heating mode and wherein the supply temperature actuator selects the cooling slide for engagement with the room temperature actuator for the cooling mode and wherein the heating slide and cooling slide are free to slide with respect to each other. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification