Liquid detection protection device and heat pump air conditioner

The invention discloses a liquid detection protection device and a heat pump air conditioner. The liquid detection protection device is arranged in a hot water machine waterway system of the heat pump air conditioner, and comprises a shell, an exhaust cavity, a liquid detection module, a liquid detection module and a control module, the shell comprises an exhaust cavity, and the exhaust cavity is communicated with a waterway in the hot water machine waterway system; the exhaust assembly is installed in the exhaust cavity, the exhaust assembly comprises an exhaust valve and a driving part, the exhaust valve comprises an exhaust core, and the exhaust core is communicated with the outside of the exhaust cavity; the driving part is movably connected to the opening part of the exhaust core, the driving part abuts against the opening part of the exhaust core under the condition that only water liquid is contained in the exhaust cavity, the exhaust core is in a closed state, a gap is formed between the driving part