SU21185A1 - Absorption Refrigeration Apparatus - Google Patents

Description

Patent K 10976 describes an intermittent absorption cooling apparatus with a combined absorber-cooler, wherein the heating of the absorbing liquid is produced by an electric coil inside the boiler. Such a device has the disadvantage that it does not make it possible to judge the moment when it is required to stop heating in the boiler to switch it to cooling in order to turn it into an absorber.

As a result, there is always the danger of the liquid overheating and increasing the pressure above the permissible limit or evaporating the absorbing liquid (water) and transferring it to the condenser. The present invention avoids all these drawbacks and also makes it possible to do without electricity, since the necessary heating of the boiler is carried out with the help of water heated in some way.

The drawing shows a vertical section of the absorption refrigeration apparatus.

The apparatus consists of an outer cylinder 1, in which the inner cylinder 2 is concentrically located. Both of these

the cylinders are interconnected by a bottom 3 and an annular cover 4 welded to them. The annular chamber formed in this way is divided by heat insulating, for example, glass wall 21, into two communicating chambers on top of it, each having a coil 5 and 6 on it. below and bottom 3 are filled with a heat-proof layer S, for example, from bakelite, etc. From each of the coils 5, b, two ends are brought out through the cover 4, one of which 5b and ba are equipped with taps 19,20, and after them they are connected in a common pipe 1 other com The valves are equipped with drainage hoses b and 6i.

To fill the apparatus with absorbing liquid and cooling gas, needle valves 12 are fed into which tubes 13 are screwed in; after the apparatus has been filled, the valves are screwed on and the caps 14 are screwed on top of them.

Bottom 3 of the apparatus from above is insulated with a heat-proof layer 9; for example, a layer of asbestos, kizlgur, felt or wood, covered externally with a casing of 1% and provided with legs 11, with the help of which it is placed on the bottom of a vessel 15 provided with legs 16.

In the CELLULAR nest of the apparatus a glass or other vessel 18c is placed with freezing water placed in a cup holder. nickname 17. As an absorption liquid, water is used in the proposed apparatus, filling up to half a chamber with a coil 5, and ammonia as a refrigerant gas, at which, at a normal temperature (15 - 20 °) and 5% ammonia vapors inside the tank are taken in 1.5 atm. and the amount of absorbing liquid and, therefore, ammonia dissolved in it, is adjusted so that when the temperature rises to 100 ° C, the pressure cannot rise above 10 atm.

The whole apparatus is placed in a vessel 15 into which water is poured. A primus stove or another heating device is placed under the vessel and the water in the vessel 15 is started to be heated, and at the same time the valve 20 is opened and the cold (eg 15-20 °) water is started through the coil to close the valve 19.

The water heating up in the vessel 15 through the walls of the cylinder 1 transfers its heat to the absorption liquid, the temperature of which begins to gradually increase. Due to this, the solubility of ammonia in it decreases, and it begins to be released, increasing the pressure inside the apparatus. At the same time, due to the flow of cold water on the coil b on the surface, its vaporous ammonia is cooled to approximately 20 °.

When the pressure inside the apparatus reaches 7.5 atm., The ammonia vapors will begin to condense in the inner annular chamber of the apparatus and the pressure will cease to rise. All this time, the water in the vessel 15 is giving up its heat to the absorption liquid, compensating the heat for dissolving the liberated ammonia, and therefore cannot boil. But when all the excess ammonia is released from the solution, and only the amount that can dissolve in it at the temperature reached remains, then further heating of the water in the vessel 15 will bring it to a boiling state.

At this point, the faucet 20 is closed and cooling water is let through the coil 5, the faucet 19 is opened for this, while at the same time fusing the water of the sause 15 and pouring cold water into it, if desired,

Due to the cooling of the solution in the outer chamber of the apparatus, the absorption capacity of it begins to increase and the condensed ammonia begins to evaporate and the vapors are absorbed by the solution. If saline water is poured into the central chamber where the cup 18 is placed, then through it the heat required for evaporation of ammonia will be removed from the water in the cup 18 and the water in the glass will freeze.

Instead of heating the water in the vessel 15, hot water or steam can be passed through the coil 5.

The subject matter of the invention.

A modification of the absorption refrigeration apparatus described in patent No. 10976, characterized by the use, for heating of the boiler, instead of an electric coil, of warm water placed in the annular space 22 between the casing 15 and the inner vessel 1, the bottom 3 of which is supplied with heat-proof insulating layers 8 and 9.

A.D.

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