Absorption chiller/absorption chiller-heater having safety device

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 a 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 to 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 regenerator will be discharged to said low pressure regenerator designed so as to generally maintain a vacuum therein during operation, thereby preventing open-to-atmosphere trouble and facilitating the restoration after safety assurance, and a temperature measuring device or pressure measuring device is disposed in the pressure relief piping to detect the temperature or pressure change in case of refrigerant vapor and absorption outflow with the pressure rise preventing means of the high pressure side activated, and further a temperature measuring device or pressure measuring device is electrically connected to a safety control monitor unit, which may detect the temperature or pressure change and stop the heating source supply to said high temperature regenerator to discontinue the operation and at the same time to inform the abnormality to the outside.

In a multiple-effect absorption chiller/absorption chiller-heater comprising an absorber, an evaporator, a low temperature heat exchanger, a low temperature regenerator, a medium temperature heat exchanger, a medium 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 the 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 said medium temperature 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 regenerator will be discharged to said medium temperature regenerator where the pressure level becomes low, thereby preventing open-to-atmosphere trouble and facilitating the restoration after safety assurance, and further a pressure rise preventing means is disposed in said medium temperature regenerator or in the refrigerant vapor piping from said medium temperature regenerator, and the discharge opening of the pressure rise preventing means of said medium temperature regenerator is connected to a low pressure regenerator through pressure relief piping in order that, when the pressure in said medium temperature regenerator increases during operation causing the pressure rise preventing means of said medium temperature regenerator to be activated, the refrigerant vapor and absorption of the medium pressure side will be discharged to said low pressure regenerator designed so as to generally maintain a vacuum during operation, thereby preventing open-to-atmosphere trouble and also facilitating the restoration after safety assurance.

In a multiple-effect absorption chiller/absorption chiller-heater comprising an absorber, an evaporator, a low temperature heat exchanger, a low temperature regenerator, a medium temperature heat exchanger, a medium 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 m refrigerant vapor piping from said high temperature regenerator, with a discharge opening of the 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 said medium temperature 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 the high pressure side will be discharged to said medium temperature regenerator where the pressure level becomes low, thereby preventing open-to-atmosphere trouble and facilitating the restoration after safety assurance, and further a pressure rise preventing means is disposed in said medium temperature regenerator or in the refrigerant vapor piping from said medium temperature regenerator, and the discharge opening of the pressure rise preventing means of said medium temperature regenerator is connected to a low pressure regenerator through pressure relief piping in order that, when the pressure in said medium temperature regenerator increases during operation causing the pressure rise preventing means of said medium temperature regenerator to operate, the refrigerant vapor and absorption of the medium pressure side will be discharged to said low pressure regenerator designed so as to generally maintain a vacuum therein during operation, thereby preventing open-to-atmosphere trouble and also facilitating the restoration after safety assurance, and a temperature measuring device or pressure measuring device is disposed in the pressure relief piping from the high pressure side to detect the temperature or pressure change in case of refrigerant vapor and absorption solution outflow with the pressure rise preventing means of the high pressure side activated, and further a temperature measuring device or pressure measuring device is electrically connected to a safety control monitor unit, which may detect the temperature or pressure change and stop the heating source supply to said high temperature regenerator to discontinue the operation and at the same time to inform the abnormality to the outside.

In a multiple-effect absorption chiller/absorption chiller-heater comprising an absorber, an evaporator, a low temperature heat exchanger, a low temperature regenerator, a medium temperature heat exchanger, a medium 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 the 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 though 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 the high pressure side will be parallel-discharged to said low pressure regenerator such as the low temperature regenerator designed so as to generally maintain a vacuum therein during operation and to the medium temperature regenerator where the pressure level becomes low, thereby preventing open-to-atmosphere trouble and facilitating the restoration after safety assurance.

In a multiple-effect absorption chiller/absorption chiller-heater comprising an absorber, an evaporator, a low temperature heat exchanger, a low temperature regenerator, a medium temperature heat exchanger, a medium 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 rising preventing means is disposed in said high temperature regenerator or in refrigerant vapor piping from said high temperature regenerator, with a discharge opening of the 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 the high pressure side will be parallel-discharged to said low pressure regenerator such as the low temperature regenerator designed so as to generally maintain a vacuum therein during operation and to the medium temperature regenerator where the pressure level becomes low, thereby preventing open-to-atmosphere trouble and facilitating the restoration after safety assurance, and a temperature measuring device or pressure measuring device is disposed in the pressure relief piping from the high pressure side to detect the temperature or pressure change in case of refrigerant vapor and absorption outflow with the pressure rise preventing means of the high pressure side activated, and further a temperature measuring device or pressure measuring device is electrically connected to a safety control monitor unit, which may detect the temperature or pressure change and stop the heating source supply to said high temperature regenerator to discontinue the operation and at the same time to inform the abnormality to the outside.