US 4,881,376 A · Adsorption refrigeration system

Abstract

An adsorption refrigeration system comprising adsorption columns housing a solid adsorbent and heat transfer tubes and sealed with a refrigerant, an evaporator, a condenser, and pipe lines connecting them together so that the refrigerant may be circulated, the pipe lines being equipped with valves, preferably, butterfly valves, capable of opening or closing by means of internal pressure difference between the evaporator side and condenser side and driving force of eccentric valve shafts. The system is operated by alternatively changing over adsorption and desorption stages between the one adsorption column(s) and the other column(s) so that both columns may be at mutually reverse stages; shortly before change-over, transferring whole amount of heat remained in the one column(s) immediately before shifting from desorption to adsorption stage to the other column(s) immediately before shifting from adsorption to desorption stage where the preheat the adsorbent and then reversing the stages. The evaporator preferably comprises heat transfer tubes for passage of a heating medium on a utilization side arranged in multi-stage, evaporating plates holding the refrigerant liquid in which each stage of the tubes are partly immersed, and overflow members for adjusting the liquid level, whereby evaporating ebullition occurs briskly.

Claims15

Dependent claims

In a method of operating an adsorption refrigerant system comprising a plurality of adsorption columns, each of which contains heat transfer tubes and the same solid absorbent;

a condenser;
an evaporator;
and pipelines equipped with valves connecting said adsorption columns with said evaporator and condenser so that a refrigerant may be circulated therethrough, the improvement comprising operating each of said plurality of adsorption columns in such a manner that it alternates between an adsorption stage and a desorption stage and at least two of said adsorption columns are at different stages at the same time;
supplying a heat transfer medium to the heat transfer tubes of one of said at least two adsorption columns during its desorption stage and a coolant to the heat transfer tubes of another of said at least two adsorption columns during its adsorption stage;
immediately preceding the termination of said desorption stage in said one adsorption column and said adsorption stage in said another adsorption column, transferring the heat transfer medium contained in the heat transfer tubes of said one adsorption column to the heat transfer tubes of said another absorption column to preheat the adsorbent contained therein;
and switching said one adsorption column to said adsorption stage and said other adsorption column to said desorption stage.

3 more elements

An adsorption refrigeration system comprising a plurality of adsorption columns, each of which contains heat transfer tubes and the same solid adsorbent;

a single evaporator;
a single condenser;
and pipelines equipped with valves connecting said adsorption columns with said evaporator and condenser so that a refrigerant may be circulated therethrough, each of said valves having a driving support shaft at an eccentric position thereof and valve means having different areas on both sides thereof and being capable of opening or closing by means of an internal pressure difference between the evaporator and one of said plurality of adsorption columns and the condenser and another of said plurality of adsorption columns;
wherein said plurality of adsorption columns are adapted to alternate between an adsorption stage and a desorption stage and at least two of said adsorption columns are at different stages at the same time.

1 more element

Dependencies are inferred from the claim text.

Adsorption refrigeration system

Life of this patent

Adsorption refrigeration system

Life of this patent

Abstract

Claims15