SU1255744A1 - Adsorption pump - Google Patents

Description

This invention relates to vacuum technology, in particular, to designs of adsorption vacuum pumps.

The purpose of the invention is to improve the pumping characteristics of the pump by intensifying the cooling of the adsorbent.

FIG. 1 shows a pump, a longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2

The adsorption pump contains a refrigerant vessel 1 with an inlet 2, an adsorbent 3 encased in a corrugated sheath 4 with inlet channels 5 and 6, and a screen 7 with perforations 8. The pump additionally contains a heater 9 and a double-walled casing 10 with a sealed interstices a cavity 11 encircling the shell 4 with the formation of a cooling cavity 2 communicated with the vessel 1 by means of a connecting channel 13, the screen 7 is corrugated and the heater 9 is fixed on the tops of its corrugation, and the perforation 8 is located on the side walls of the latter, The interstitial cavity 11 of the casing 10 communicates with one of the inlet channels 5 or 6 of the shell 4 by means of a tube 14, and the inlet 2 of the vessel 1 is provided with a locking element 15.

The pump works as follows.

The locking element 15 is opened and a coolant is supplied to the vessel 1 through the pipe 2,

which fills the vessel 1 and through the connecting channel 13 enters the cooling cavity 12. Adsorbent 3 begins to cool rapidly, since the refrigerant removes heat from the adsorbent from almost all sides. Lowering the temperature of the adsorbent leads to the formation of a pressure gradient between the evacuated volume, connected to the inlet channels 5 and 6, and the internal cavity of the shell 4, in which the adsorbent is located. The presence of a pressure gradient causes gas to be pumped out of the volume. At the same time, gas is pumped out from the interwall wall 11 of the casing 10 through the tube 14. In this way

reliable protection of the refrigerant from external heat input. After the adsorbent 3 is saturated, the refrigerant from the vessel 1 and the cavity 12 is discharged through the nozzle 2 and the locking element 15. The heater 9 is turned on and the heat flow from it through the screen 7 flows to the corrugated

The sheath 4. As a result, the adsorbent 3 is heated, the previously adsorbed gases are desorbed and removed from the pump. After complete desorption, the pump is again ready for operation.

Intensifying the adsorbent cooling by providing heat dissipation from it on all sides improves pumping characteristics of the pump.

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VNIIPI Order 4796/34 Circulation 586 Subscription

Branch PPP "Patent, Uzhgorod, st. Project, 4

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Claims (1)

AN ADSORPTION PUMP containing a refrigerant vessel with an inlet, an adsorbent enclosed in a corrugated shell with inlets, and a perforated screen, characterized in that, in order to improve the pumping characteristics by intensifying the adsorbent cooling, it additionally contains a heater and a double-walled casing with sealed interwall cavity, wrapping the shell with the formation of a cooling cavity in communication with the vessel using the connecting channel, the screen is corrugated and the heater is fixed on its corrugation peaks, and the perforation is located on the side walls of the latter, wherein the housing cavity interspace communicates with one of the input channels using the sheath tube and the inlet pipe of the vessel is provided with a locking element. figs! SU „,, 1255744