Absorption refrigeration system of the inert gas type

Claim 2

In absorption refrigeration apparatus having an inert gas circuit, a. a heat transfer member in said circuit comprising piping inclined at an acute angle to the horizontal, b. means for supplying liquid to said piping, c. means at the inner wall of said piping defining paths of flow for the liquid, said means comprising a plurality of internal longitudinal capillary grooves which are disposed alongside one another with successive regions of said grooves in the direction of liquid flow being located at progressively different vertical distances from a horizontal plane intersecting said grooves, d. said grooves being at an acute angle to the generatrix of said piping which is less than the acute angle at which said piping is inclined to the horizontal, and e. said grooves converging to vertices of angle in the bottom generatrix of said piping, said vertices being directed in a direction opposite to the direction liquid flows through said piping.

Claim 3

In absorption refrigeration apparatus having an inert gas circuit, a. a heat transfer member in said circuit comprising piping inclined at an acute angle to the horizontal, b. means for supplying liquid to said piping, c. means at the inner wall of said piping defining paths of flow for the liquid, said means compRising a plurality of internal longitudinal capillary grooves which are disposed alongside one another with successive regions of said grooves in the direction of liquid flow being located at progressively different vertical distances from a horizontal plane intersecting said grooves, d. said grooves being at an acute angle to the generatrix of said piping which is less than the acute angle at which said piping is inclined to the horizontal, and e. said piping at the top part thereof being formed with at least one indentation at the underside of which liquid tends to adhere and along which liquid tends to flow, said indentation being so constructed and formed that drops of liquid are formed at its lowest part and fall therefrom.

Claim 4

In absorption refrigeration apparatus having an inert gas circuit, a. a heat transfer member in said circuit comprising piping inclined at an acute angle to the horizontal, b. means for supplying liquid to said piping, c. means at the inner wall of said piping defining paths of flow for the liquid, said means compRising a plurality of internal longitudinal capillary grooves which are disposed alongside one another with successive regions of said grooves in the direction of liquid flow being located at progressively different vertical distances from a horizontal plane intersecting said grooves, d. said grooves being at an acute angle to the generatrix of said piping which is less than the acute angle at which said piping is inclined to the horizontal, and e. said piping at the top part thereof being formed with at least one indentation at the underside of which liquid tends to adhere and along which liquid tends to flow, said indentation being so constructed and formed that drops of liquid are formed at its lowest part and fall therefrom.

Claim 5

In absorption refrigeration apparatus having an inert gas circuit, (a) a heat transfer member in said circuit comprising piping inclined at an acute angle to the horizontal, (b) means for supplying liquid to said piping, c. means at the inner wall of said piping defining paths of flow for the liquid, said means comprising a plurality of internal longitudinal capillary grooves which are disposed alongside one another with successive regions of said grooves in the direction of liquid flow being located at progressively different vertical distances from a horizontal plane intersecting said grooves, d. said grooves being at an acute angle to the generatrix of said piping which is less than the acute angle at which said piping is inclined to the horizontal, and e. said piping at the top part thereof being formed with a plurality of indentations in spaced relation and at the undersides of which liquid tends to adhere and along which liquid tends to flow, said indentations being so constructed and formed that drops of liquid are formed at their lowest parts and fall therefrom.

Claim 6

In absorption refrigeration apparatus having an inert gas circuit, (a) a heat transfer member in said circuit comprising piping inclined at an acute angle to the horizontal, (b) means for supplying liquid to said piping, c. means at the inner wall of said piping defining paths of flow for the liquid, said means comprising a plurality of internal longitudinal capillary grooves which are disposed alongside one another with successive regions of said grooves in the direction of liquid flow being located at progressively different vertical distances from a horizontal plane intersecting said grooves, d. said grooves being at an acute angle to the generatrix of said piping which is less than the acute angle at which said piping is inclined to the horizontal, and e. said piping at the top part thereof being formed with a plurality of indentations in spaced relation and at the undersides of which liquid tends to adhere and along which liquid tends to flow, said indentations being so constructed and formed that drops of liquid are formed at their lowest parts and fall therefrom.

Claim 7

Apparatus as set forth in claim 3 in which said piping at the bottom part thereof is formed with at least one indentation which is so positioned with respect to said indentation at the top part of said piping that drops of liquid falling from the latter will collect and form a pool of liquid in front of said indentation in the bottom part of said piping.

Claim 8

Apparatus as set forth in claim 4 in which said piping at the bottom part thereof is formed with a plurality of indentations in spaced relation, each of said last-mentioned indentations being so positioned with respect to a different one of said indentations at the top part of said piping that drops of liquid falling from the latter will collect and form a pool of liquid in front of each of said indentations in the bottom part of said piping.

Claim 9

In absorption refrigeration apparatus having an inert gas circuit, a. a heat transfer member in said circuit comprising piping inclined to the horizontal, b. means for supplying liquid to said piping, c. means at the inner wall of said piping defining paths of flow for the liquid, said means comprising a plurality of internal longitudinally extending grooves distributed about the inner wall alongside one another, d. said grooves being at an angle to the generatrix of said piping, and e. said piping being inclined to the horizontal at an angle which is larger than the angle of said grooves with respect to the generatrix of said piping.

Claim 10

In absorption refrigeration apparatus having an inert gas circuit, a. a heat transfer member in said circuit comprising piping inclined to the horizontal, b. means for supplying liquid to said piping, c. means at the inner wall of said piping defining paths of flow for the liquid, said means comprising a plurality of internal longitudinally extending grooves distributed about the inner wall alongside one another, d. said grooves being at an angle to the generatrix of said piping, and e. said piping being inclined to the horizontal at an angle which is larger than the angle of said grooves with respect to the generatrix of said piping.

Claim 11

Apparatus as set forth in claim 6 in which said grooves are so constructed and formed that in the top part of said piping liquid passes from said grooves and spreads over the ridges between the grooves.

Claim 12

Apparatus as set forth in claim 7 in which all regions of individual longitudinally extending grooves, in an upright position of the apparatus, are disposed at a vertical distance from a horizontal plane above the piping, such vertical distance becoming increasingly greater in the direction of liquid flow.

Claim 13

In absorption refrigeration apparatus having an inert gas circuit, a. heat transfer structure in said circuit comprising at least two substantially straight pIpe sections which, in an upright position of the apparatus, are inclined to the horizontal in opposite directions from a vertical plane passing through said pipe sections, b. said inclined pipe sections bieng disposed one above another in substantially the same vertical plane, c. means for supplying liquid to said pipe sections, d. means at the inner walls of said pipe sections defining paths of flow for the liquid, said means comprising a plurality of internal longitudinally extending grooves distributed about the inner walls alongside one another, e. said grooves in each pipe section being at an angle to the generatrix thereof, f. each of said pipe sections, in an upright position of the apparatus, being inclined to the horizontal at an angle which is larger than the angle of said grooves in each pipe section with respect to the generatrix thereof, and g. each one of said pipe sections, during normal operation of the apparatus, being capable of performing adequately for the apparatus to develop sufficient refrigerating capacity when the performance of the other one of said pipe sections is impaired responsive to inclination of the apparatus from the vertical plane in a direction which reduces the angle of inclination of the other one of said pipe sections to the horizontal.

Claim 14

In absorption refrigeration apparatus having an inert gas circuit, a. heat transfer structure in said circuit comprising at least two substantially straight pIpe sections which, in an upright position of the apparatus, are inclined to the horizontal in opposite directions from a vertical plane passing through said pipe sections, b. said inclined pipe sections bieng disposed one above another in substantially the same vertical plane, c. means for supplying liquid to said pipe sections, d. means at the inner walls of said pipe sections defining paths of flow for the liquid, said means comprising a plurality of internal longitudinally extending grooves distributed about the inner walls alongside one another, e. said grooves in each pipe section being at an angle to the generatrix thereof, f. each of said pipe sections, in an upright position of the apparatus, being inclined to the horizontal at an angle which is larger than the angle of said grooves in each pipe section with respect to the generatrix thereof, and g. each one of said pipe sections, during normal operation of the apparatus, being capable of performing adequately for the apparatus to develop sufficient refrigerating capacity when the performance of the other one of said pipe sections is impaired responsive to inclination of the apparatus from the vertical plane in a direction which reduces the angle of inclination of the other one of said pipe sections to the horizontal.

Claim 15

Apparatus as set forth in claim 9 in which all regions of individual grooves in each of said pipe sections, in an upright position of the apparatus, are disposed at a vertical distance from a horizontal plane above the pipe sections, such vertical distance becoming increasingly greater in the direction of liquid flow.