Abstract: A gas-liquid separation device includes a housing assembly, a separation assembly, a bottom end plate, an exhaust pipe, and a seal. A separation chamber is defined in the housing assembly. A bottom of the housing assembly has a through-opening. The separation assembly performs gas-liquid separation on a gas-liquid mixture. The bottom end plate is located at a bottom of the separation assembly. A liquid reservoir is defined by the bottom end plate and receives a liquid separated by the separation assembly. The exhaust pipe has an exhaust channel and a liquid discharge channel. The exhaust pipe passes through the through-opening to allow a gas separated by the separation assembly to flow through the exhaust channel. A flow diversion cavity is defined between the exhaust pipe and the bottom end plate, and is in communication with an outlet of the liquid reservoir and an inlet of the liquid discharge channel.