Apparatus for producing dry compressed air
First Claim
1. Apparatus for producing dry compressed air comprising a dry compressed air storage container, means for delivering dry compressed air from said storage container to a point of use, a source of compressed air for supplying compressed air to said storage container, flow connection means connecting said source to said storage container to supply compressed air from said source to said storage container, filter means including an adsorption filter disposed in said connection means between said source and said storage container for filtering and drying the compressed air supplied from said source to said storage container, means responsive to pressure in said storage container for discontinuing the supply of compressed air from said source to said storage container when the pressure in said storage container reaches a predetermined value, a valved controlled discharge outlet in said flow connection means between said adsorption filter and said source, and control means for effecting reverse flow of air from said storage container back through said adsorption filter and said discharge outlet to the atmosphere when the supply of compressed air from said source is discontinued to regenerate said adsorption filter, said control means comprising valve means responsive to the moisture content of compressed air in said storage container to effect said reverse flow only when the moisture content of said air is also a predetermined value.
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Abstract
Apparatus for producing dry compressed air comprises a compressor, a separator to remove condensates, an adsorption filter to filter and dry the air and a storage tank. A valve for controlling reverse flow of air from the storage tank through the filter to the atmosphere to regenerate the adsorption filter when the compressor stops is controlled by a moisture sensitive device so that reverse flow is permitted only if the moisture control of the compressed air is above a predetermined value. The opening of a tap to discharge collected liquid from the separator is controlled by a pneumatically operated valve system so that no electrical control is required.
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Citations
20 Claims
- 1. Apparatus for producing dry compressed air comprising a dry compressed air storage container, means for delivering dry compressed air from said storage container to a point of use, a source of compressed air for supplying compressed air to said storage container, flow connection means connecting said source to said storage container to supply compressed air from said source to said storage container, filter means including an adsorption filter disposed in said connection means between said source and said storage container for filtering and drying the compressed air supplied from said source to said storage container, means responsive to pressure in said storage container for discontinuing the supply of compressed air from said source to said storage container when the pressure in said storage container reaches a predetermined value, a valved controlled discharge outlet in said flow connection means between said adsorption filter and said source, and control means for effecting reverse flow of air from said storage container back through said adsorption filter and said discharge outlet to the atmosphere when the supply of compressed air from said source is discontinued to regenerate said adsorption filter, said control means comprising valve means responsive to the moisture content of compressed air in said storage container to effect said reverse flow only when the moisture content of said air is also a predetermined value.
Specification