(1) When the chilled water outlet temperature in our LiBr absorption chiller is excessively low, so that the dilute solution mass fraction rises, will cause the solution pump suction emptying, so that the concentrated solution mass fraction rises, there is a danger of solution crystallization, the evaporator temperature is too low, will cause the evaporator liquid sac refrigerant water freezing; at the same time, the cooling capacity decreases sharply.

(2) When the refrigerant water outlet temperature rises excessively, so that the evaporator liquid box refrigerant water level drops, resulting in refrigerant pump suction empty, while the rise in refrigeration also tends to level off.

Therefore, to control the refrigerant water outlet temperature is not less than 3 ℃; take the refrigerant water level control, do not make the refrigerant pump suction empty, so as to play a protective role in the unit.