Patent ID: 6550272
Filing Date: 2003-04-22
Classification: F25B,Y02A,Y02B

Abstract:
In a double-effect absorption chiller/absorption chiller-heater comprising an absorber, an evaporator, a low temperature heat exchanger, a low temperature regenerator, a high temperature heat exchanger, a high temperature regenerator, a condenser, a solution circulating pump, and solution piping and refrigerant piping for the connection of these devices, wherein a pressure rise preventing means is disposed in said high temperature regenerator or in refrigerant vapor piping from said high temperature regenerator, with a discharge opening of said pressure rise preventing means being open to the atmosphere, in order to prevent the pressure rise in said high temperature regenerator when the interior pressure of said high temperature regenerator exceeds the atmospheric pressure or the set pressure level,an absorption chiller/absorption chiller-heater having a safety device, which is characterized in that the discharge opening of said pressure rise preventing means is connected to a low pressure regenerator through pressure relief piping in order that, when the pressure in said high temperature regenerator increases during operation causing the pressure rise preventing means to operate, the refrigerant vapor and absorption solution of a high pressure regenerators will be discharged to said low pressure regenerators designed so as to generally maintain a vacuum therein during operation, thereby preventing open-to-atmosphere trouble and facilitating the restoration after safety assurance.