Patent ID: 7793513
Filing Date: 2010-09-14
Classification: F24F,G05D

Abstract:
1. A refrigerant Packaged Terminal Air Conditioners (PTAC) system for conditioning a current of air from a room, the refrigerant PTAC system is selectively configurable in a hardwire configuration and a wireless configuration, the refrigerant PTAC system comprising: a housing defining a supply air chamber and a controls chamber; a compressor disposed within the housing; a condenser disposed within the housing; an evaporator disposed within the supply air chamber; a supply air blower disposed within the supply air chamber for forcing the current of air across the evaporator; a high airflow temperature sensor in heat transfer relationship with the current of air from the room; a primary microprocessor disposed within the controls chamber and hardwired to the high airflow temperature sensor; a low airflow temperature sensor sensing a temperature of the room; an output device for displaying an actual temperature of the room; a user input device for entering a desired setpoint temperature; and a supplementary microprocessor hardwired to the user input device, the output device, and the low airflow temperature sensor, wherein the supplemental microprocessor is in communication with the primary microprocessor such that: a) in the hardwire configuration, the primary microprocessor is hardwired to the supplementary microprocessor, the high airflow temperature sensor is inside the housing, the low airflow temperature sensor is inside the housing, and the primary microprocessor controls the compressor and the supply air blower in response to the high airflow temperature sensor, b) in the wireless configuration, the primary microprocessor and the supplementary microprocessor communicate via a wireless communication link therebetween, the high airflow temperature sensor is inside the housing, the low airflow temperature sensor is outside the housing, and the primary microprocessor controls the compressor and the supply air blower in response to the low airflow temperature sensor, c) the high airflow temperature sensor provides a high airflow temperature reading, and in the event that the high airflow temperature reading goes beyond a predetermined valid range of values while in the hardwire configuration, the primary microprocessor switches from controlling the compressor and the supply air blower in response to the high airflow temperature sensor to controlling the compressor and the supply air blower in response to the low airflow temperature sensor, and d) the low airflow temperature sensor provides a low airflow temperature reading, and in the event that the low airflow temperature reading goes beyond a predetermined valid range of values while in the wireless configuration, the primary microprocessor switches from controlling the compressor and the supply air blower in response to the low airflow temperature sensor to controlling the compressor and the supply air blower in response to the high airflow temperature sensor.