Generator of absorption refrigeration apparatus

Claim 1

In an absorption refrigeration apparatus including a generator having vertically elongated refrigerant solution boiling means provided with cylindrical electric and gas heaters disposed therealong, said generator including a vapor-liquid separator communicatively connected to the boiling means downstream of the same and extending in parallelism with the boiling means, a refrigerant condenser connected to the vaporliquid separator, a refrigerant evaporator connected to the condenser, an absorber vessel connected to the evaporator, an absorber coil connected at one end thereof to the absorber vessel, a weak solution transfer conduit connecting the boiling means to the other end of the absorber coil, a rich liquid conduit supplying rich solution stored in the absorber vessel into the vapor-liquid separator, and a rich solution transfer conduit connecting the vapor-liquid separator to the bottom of the boiling means, the improvement in which the refrigerant solution boiling means comprises a vertically disposed pumping chamber connected at its bottom part to the rich solution transfer conduit to be supplied with rich refrigerant solution thereinto, an elongated vertical boiler tube disposed above said pumping chamber in vertical alignment therewith and communicating at its top with the vapor-liquid separator, said boiler tube being connected to the weak solution transfer conduit at its bottom part and having a diameter equal to that of the pumping chamber, and a vapor lift tube communicatively connecting said pumping chamber to said boiler tube and extending upwards into the boiler tube to open into an upper space within the boiler tube, and to provide an annular space about the portion of the vapor lift pipe located within the boiler tube, said electric and gas heaters being rigidly secured by welds to the pumping chamber and the boiler tube on opposite sides thereof and at positions such that a plane passing through the longitudinal axes of the heaters is substantially perpendicular to a plane passing through the longitudinal axes of the separator and the boiler tube, and the longitudinal axes of the rich and weak refrigerant solution conduits lying in the plane passing through the longitudinal axes of the boiler tube and the separator.