Heat pump dryer including a heat exchanger bypass system

A laundry appliance comprising:

• a cabinet;
• a drum rotatably supported in the cabinet;
• a blower fan arranged in the cabinet, the blower fan being configured to generate an airflow;
• a basement arranged in the cabinet, the basement including a basement inlet in fluid communication with the blower fan and a basement outlet in fluid communication with the drum;
• a heat exchanger system arranged in the basement along a primary flow path;
• a bypass duct arranged in the cabinet, the bypass duct including a bypass inlet in fluid communication with the blower fan and a bypass outlet in fluid communication with the drum, the bypass duct selectively directing the airflow through a bypass flow path around the heat exchanger system;
• and
• a control module configured to selectively fluidically connect the blower fan with the bypass inlet of the bypass duct and fluidically isolate the heat exchanger system from the airflow during a first portion of a drying cycle and fluidically connect the basement inlet with the blower fan to direct the airflow through the primary flow path across the heat exchanger system during a second portion of the drying cycle.