Method of producing cold in an absorption-type refrigerating plant performing this method

Claim 3

A method in accordance with claim 1, wherein said primary flow of said absorbent includes independent successively supplied flows of absorbent that have absorbed said vapor of said coolant at different pressures.

Claim 4

A method in accordance with claim 2, wherein said absorbent is an aqueous solution of lithium bromide and said coolant is water.

Claim 5

An absorption-type refrigerating plant using a coolant comprising: evaporating means for evaporating the coolant; absorbing means communicating through a vapor space to said evaporating means for absorbing the vapor of said coolant with a liquid absorbant; an absorbent regenerator subdiviDed by a throttle into an absorbent superheating zone under a high pressure and stages for successive step-wise reduction of the pressure of said superheated absorbent, said regenerator communicating in a primary flow and a return flow with said absorbing means, said regenerator having a plurality of successive passages for the passage therethrough of the primary flow of said absorbent towards said superheating zone, an additional passage for the passage therethrough of the return flow in successive stages of said superheated absorbent directed in a counterflow to the primary flow, and a plurality of passages for the flow of a condensate; means provided at said successive stages of said return flow passage and at least some of said condensate passages for reducing the pressure of said return flow of absorbent and said condensate, said means subdividing said regenerator into said successive stages, each stage starting from said superheating zone being associated with a successive one of said stages for a separate passage of said absorbent and said condensate; pipes for returning the coolant condensate to said evaporating means for a subsequent evaporation thereof at a low temperature due to the heat extracted from the object being cooled and for returning the coolant vapor to said absorbing means, pipes for returning of strengthened absorbant to absorbing means of the vapor of said collant; means for cooling the liquid absorbant; and means for heat exchange between the vapor of said coolant of return absorbent flow and said primary absorbent flow.

Claim 6

An absorption-type refrigerating plant using a coolant comprising: evaporating means for evaporating the coolant; absorbing means communicating through a vapor space to said evaporating means for absorbing the vapor of said coolant with a liquid absorbant; an absorbent regenerator subdiviDed by a throttle into an absorbent superheating zone under a high pressure and stages for successive step-wise reduction of the pressure of said superheated absorbent, said regenerator communicating in a primary flow and a return flow with said absorbing means, said regenerator having a plurality of successive passages for the passage therethrough of the primary flow of said absorbent towards said superheating zone, an additional passage for the passage therethrough of the return flow in successive stages of said superheated absorbent directed in a counterflow to the primary flow, and a plurality of passages for the flow of a condensate; means provided at said successive stages of said return flow passage and at least some of said condensate passages for reducing the pressure of said return flow of absorbent and said condensate, said means subdividing said regenerator into said successive stages, each stage starting from said superheating zone being associated with a successive one of said stages for a separate passage of said absorbent and said condensate; pipes for returning the coolant condensate to said evaporating means for a subsequent evaporation thereof at a low temperature due to the heat extracted from the object being cooled and for returning the coolant vapor to said absorbing means, pipes for returning of strengthened absorbant to absorbing means of the vapor of said collant; means for cooling the liquid absorbant; and means for heat exchange between the vapor of said coolant of return absorbent flow and said primary absorbent flow.

Claim 7

A refrigerating plant in accordance with claim 4, wherein said means for pressure-reducing comprise hydraulic seals.

Claim 8

A refrigerating plant in accordance with claim 5, wherein each said stage of said regenerator includes a pack of plates separated by gaskets and having apertures made therethrough, said apertures making up together said passages for the passage of said primary and said return flows and of said condensate.

Claim 9

A refrigerating plant according to claim 6, wherein each of said stages includes a gasket defining on an adjacent extreme one of said plates conjugated with the blind wall of an evaporating panel, a vertical conduit communicating with each other a pair of said adjacent stages and having a predetermined height, the height of said vertical conduit determining the value of the pressure drop between said adjacent stages.

Claim 10

An absorption-type refrigerating plant using a coolant, comprising: evaporating means for evaporating the coolant; absorbing means communicating through a vapor space to said evaporating means for absorbing the vapor of said coolant with a liquid absorbent at different pressures; an absorbent regenerator subdivided by a throttle into an absorbent superheating zone under a high pressure and stages for successive step-wise reduction of the pressure of said superheated absorbent, said superheating zone being associated with said regenerator having a plurality of successive passages for the passage therethrough of a primary flow of said absorbent to said superheating zone, an additional passage for the passage therethrough of a return flow in successive stages of said superheated absorbent directed in a counterflow to the primary flow, and a plurality of passages for the flow of a condensate; means provided at said successive stages of said return flow passage and said plurality of condensate passages for reducing the pressure of said return flow of absorbent and said condensate, said mean subdividing said regenerator into said successive stages, each stage starting from said superheating zone being associated with a successive one of said stages for a separate passage of said absorbent and said condensate; and means for heat-exchange between the vapor of said coolant of return absorbent flow and said primary absorbent flow; said regenerator comprising stages thereof which are grouped into first and second sections, the second one of said sections being disposed in the primary flow on the flow path of the regenerated absorbent from absorbing means which is operated at relatively low pressure to absorbing means which is operated at a relatively higher pressure, the first one of said sections being coupled to said absorbing means which is operated at a relatively higher pressure.

Claim 11

An absorption-type refrigerating plant using a coolant, comprising: evaporating means for evaporating the coolant; absorbing means communicating through a vapor space to said evaporating means for absorbing the vapor of said coolant with a liquid absorbent at different pressures; an absorbent regenerator subdivided by a throttle into an absorbent superheating zone under a high pressure and stages for successive step-wise reduction of the pressure of said superheated absorbent, said superheating zone being associated with said regenerator having a plurality of successive passages for the passage therethrough of a primary flow of said absorbent to said superheating zone, an additional passage for the passage therethrough of a return flow in successive stages of said superheated absorbent directed in a counterflow to the primary flow, and a plurality of passages for the flow of a condensate; means provided at said successive stages of said return flow passage and said plurality of condensate passages for reducing the pressure of said return flow of absorbent and said condensate, said mean subdividing said regenerator into said successive stages, each stage starting from said superheating zone being associated with a successive one of said stages for a separate passage of said absorbent and said condensate; and means for heat-exchange between the vapor of said coolant of return absorbent flow and said primary absorbent flow; said regenerator comprising stages thereof which are grouped into first and second sections, the second one of said sections being disposed in the primary flow on the flow path of the regenerated absorbent from absorbing means which is operated at relatively low pressure to absorbing means which is operated at a relatively higher pressure, the first one of said sections being coupled to said absorbing means which is operated at a relatively higher pressure.