Lithium bromide absorption type first-class heat pump unit device and control method thereof

The invention discloses a lithium bromide absorption type first-class heat pump unit device and a control method thereof. The control method comprises the following steps of: adjusting the circulation volumes of solution and a coolant by a liquid level comprehensive control method to realize stable liquid level control and unit load stability control over a regenerator (4) and an evaporator (1); performing inverse heat release control and alarming to realize the energy-saving running of the unit by an inverse heat release control method with a heat source water inlet temperature sensor (8), aheat source water outlet temperature sensor (7), a warm water inlet temperature sensor (12) and a regenerator temperature sensor (15); and realizing fast dilution running and effectively preventing the liquid coolant from being frozen and the solution from being crystallized under a low-temperature environment by a coolant discharge electromagnetic valve (13) between the evaporator (1) and an absorber (2).