초록 ▼

In building environmental control, primary HVAC services are distributed to multiple terminal units. An active diffuser terminal unit has a variable speed fan to controllably draw room air into the unit for reheating the air; and, conversely, to force conditioned air down into the space for cooling

In building environmental control, primary HVAC services are distributed to multiple terminal units. An active diffuser terminal unit has a variable speed fan to controllably draw room air into the unit for reheating the air; and, conversely, to force conditioned air down into the space for cooling by reversing the direction of the fan motor. Variation of the fan speed serves to modulate the airflow direction mix through a combination of a vertical port and a horizontal port. This closed system avoids filtering plenum air, and reduces cost by supporting both heating and cooling services with a single fan.

대표청구항 ▼

[ What is claimed is:] [1.] An active diffuser for connection to a supply of conditioned air in a variable air volume heating and cooling system to serve a workplace in which the diffuser is installed, comprising:a housing; the housing including a base plate that extends generally parallel to the wo

[ What is claimed is:] [1.] An active diffuser for connection to a supply of conditioned air in a variable air volume heating and cooling system to serve a workplace in which the diffuser is installed, comprising:a housing; the housing including a base plate that extends generally parallel to the workspace ceiling when the active diffuser is installed for service in the ceiling;inlet means in the housing for connection to the air supply to receive conditioned air flow;a first port formed in the housing for passive airflow from the housing into the workspace;a second port formed as an aperture in the base plate; anda fan mounted within the housing and supported by the baseplate in a position substantially aligned over and in communication with the second port for driving air from the housing through the second port and alternatively for pulling workspace air through the second port from the workspace into the housing for mixing with the conditioned air so that mixed air, having a temperature in between the conditioned air temperature and the workspace air temperature, flows into the workspace through the first port and further comprising a temperature sensor mounted within the housing over the aperture for sensing workspace air temperature without physically depending down into the workspace;wherein the fan includes a fan blade and a motor for driving the fan blade, and the motor is reversible for driving the fan blade in a forward direction to drive air into the workspace, and for driving the fan blade in a reverse direction to pull air out of the workspace; andwherein the motor consists of a variable speed motor thereby allowing adjustment of a temperature of air entering the workspace through the first port by adjusting a speed of the variable speed motor.