Egg incubator with a precision adjustment function of humidity

An egg incubator with a precision adjustment function of humidity, comprising:

• a hood, provided with an incubation compartment and a mounting opening in air communication with the incubation compartment;
• a rotation frame, arranged in the incubation compartment and configured to carry an incubated egg;
• a host portion, arranged at the mounting opening, wherein the host portion comprises a housing, a fan, an exhaust valve, a humidity sensor, and a main control circuit board, the main control circuit board is electrically connected to the fan, the exhaust valve, and the humidity sensor, the housing is provided with a work compartment, a circulation air inlet, a circulation air outlet, and a valve opening, the circulation air inlet and the circulation air outlet are in air communication with the work compartment and the incubation compartment, the valve opening is in air communication with the work compartment and outside air, the fan is arranged in the work compartment, the exhaust valve is arranged at the housing and is configured to open or close the valve opening, the housing is provided with a humidification tank in a path of airflow providing by the fan, and the humidity sensor is configured to detect air humidity in the incubation compartment;
• wherein the incubation compartment, the circulation air inlet, the work compartment, and the circulation air outlet are sequentially in air communication to form an internal circulation air path, and the incubation compartment, the circulation air inlet, the work compartment, and the valve opening are sequentially in air communication to form an external circulation air path;
• wherein when the air humidity in the incubation compartment detected by the humidity sensor is less than a first preset humidity threshold, the main control circuit board controls the exhaust valve to close the valve opening, and the airflow providing by the fan is in contact with humidification liquid stored in the humidification tank and circulates between the work compartment and the incubation compartment by the internal circulation air path;
• and
• wherein when the air humidity in the incubation compartment detected by the humidity sensor is greater than a second preset humidity threshold, the main control circuit board controls the exhaust valve to open the valve opening, and the airflow providing by the fan is discharged to the outside air by the external circulation air path.