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US 9,810,462 B2Granted
Dehumidification using intermittent ventilation
AssigneeLennox Industries Inc.
InventorJonathan Douglas
Life of this patent
Estimating the term…
Abstract
Systems and methods for dehumidifying and conditioning air for a commercial building are presented. In one instance, a system involves ventilating a building at a rate higher than the required outdoor airflow rate in order to compensate for the fan being turned off when the compressor is off. Other systems and methods are presented.
Claims11
A method for ventilating a building comprising:
- providing a heating, ventilating and air conditioning system comprising:
- an outdoor air intake and an actuator to adjust outdoor air introduced there through,
- an outdoor air measurement device associated with the outdoor air intake for determining a quantity of outdoor air entering through the outdoor air intake,
- a compressor for cooling air, and
- a controller, the controller coupled to the outdoor air measurement device and the outdoor air intake and configured to control the outdoor air intake to allow a prescribed amount of outdoor air to enter there through;
- estimating a first duty cycle of the compressor to arrive at a first estimated duty cycle of the compressor;
- determining a first desired airflow rate through the outdoor air intake based on the first estimated duty cycle of the compressor and a required continuous outdoor air flow rate;
- adjusting the outdoor air intake using the controller to set the first desired airflow rate through the outdoor air intake;
- and
- running the compressor and a fan for a first time interval.
7 more elements
A method of manufacturing a rooftop heating, ventilation, and air conditioning system, the method comprising:
- providing a housing;
- coupling an outdoor air intake and actuator to the housing;
- associating an outdoor air measurement device with the outdoor air intake for determining a quantity of outdoor entering through the outdoor air intake;
- coupling a compressor and fan to the housing for cooling air;
- configuring the compressor and fan to operate to operate simultaneously;
- and
- coupling a controller to the actuator and outdoor air measurement device, the controller operable to control the outdoor air intake to allow a set ventilation flow rate to enter there through, the controller comprising:
- an interface configured to receive feedback data corresponding to an estimated quantity of outdoor air entering through the outdoor air intake and the air intake position,
- a ventilation director configured to set the ventilation airflow rate through the air intake based on the air intake position and air intake ventilation data, and
- an airflow director configured to:
- determine a first estimated duty cycle,
- determine a desired outdoor airflow rate for a beginning time interval based on the first estimated duty cycle in order to meet a required continuous outdoor airflow rate, and
- communicate with the ventilation director to adjust the outdoor air intake to obtain the desired outdoor airflow rate through the outdoor air intake.
10 more elements
Dependencies are inferred from the claim text.