AIR-CONDITIONING AND VENTILATION APPARATUS

摘要

An air-conditioning and ventilation apparatus includes an air-conditioning coil that is installed on a downstream side of a heat exchanger in a supply air trunk and changes cooling capacity with respect to heat-exchanged outdoor air in multiple stages; an outdoor-air temperature and humidity sensor that detects temperature and relative humidity of the outdoor air; and a control unit that stores therein reference data in which the cooling capacity is set for each combination of temperature and relative humidity of the outdoor air such that absolute humidity of supply air becomes equal to or lower than indoor target absolute humidity on the basis of a dehumidification load corresponding to an absolute humidity difference between indoors and outdoors, and determines a cooling capacity value of the air-conditioning coil on the basis of detection results during a cooling operation by the outdoor-air temperature and humidity sensor and the reference data.

主权项

1. An air-conditioning and ventilation apparatus that exhausts indoor air to outdoors, regulates outdoor air to a pre-set indoor target temperature and a pre-set indoor target absolute humidity, and supplies the regulated outside air to a room, the air-conditioning and ventilation apparatus comprising:
a casing having
a supply air trunk that connects an outdoor side inlet with an indoor side outlet andan exhaust air trunk that connects an indoor side inlet with an outdoor side outlet; a supply air fan that is provided on the supply air trunk
to draw in the outdoor air from the outdoor side inlet andto supply the outdoor air into the room from the indoor side outlet; an exhaust air fan that is provided on the exhaust air trunk
to draw in the indoor air from the indoor side inlet andto supply the indoor air to outdoors from the outdoor side outlet; a heat exchanger that is provided between the supply air trunk and the exhaust air trunk to perform heat exchange between the supply air and the exhaust air; an air-conditioning coil that is provided on a downstream side of the heat exchanger in the supply air trunk and that changes cooling capacity to outdoor air after heat exchange has been performed,
the changes in cooling capacity being in multiple stages; an outdoor-air temperature and humidity sensor that detects a temperature and relative humidity of the outdoor air; and a control unit that
stores therein reference data in which, on the basis of a dehumidification load corresponding to an absolute humidity difference between indoors and outdoors, the cooling capacity is set for each combination of temperature and relative humidity of the outdoor air such that absolute humidity of the supply air becomes equal to or lower than the indoor target absolute humidity, anddetermines a cooling capacity value of the air-conditioning coil on the basis of the reference data and detection results during cooling operation by the outdoor-air temperature and humidity sensor.