Patent ID: 11946671
Assignee: nan
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A heat pump type air conditioning system comprises an outdoor unit, an indoor unit, and a thermostat;
wherein the outdoor unit comprises a main controller, a sensor input unit, a database unit, a driver, a compressor, a fan, a four-way valve, an electronic expansion valve, and an interface circuit; and the thermostat is configured to send a conventional AC voltage output toggling on and off on one wire to the main controller; and
the main controller is further configured from power-off to determine if the system needs to run in cooling mode or heating mode; and
the main controller is configured to send an instruction for cooling or heating to the driver; and
wherein the sensor input unit is configured to acquire data collected by outdoor unit sensors, including ambient temperature; and
the database unit is configured to store various data of the system operation, including the instructions received by the main controller, timing, and the various sensor data; and

the main controller is further configured to calculate various parameters required to interpret an instruction received from the thermostat whenever the outdoor unit is powered up; and
wherein the main controller is further configured from power-off to determine if the system has run in cooling mode, and that the cooling mode was previously run before the power was cut, and whether the outdoor ambient temperature T′ recorded before the power-off is within a threshold A from the current outdoor ambient temperature T, and when −A<(T−T′) is satisfied, send an instruction for cooling to the driver or send an instruction for heating when the conditions are not met.