Filters for compressed air dryers

Abstract

This invention provides a filter for compressed air dryers that offers high efficiency in removing oil from compressed air and reduces the man-hours required to manufacture the compressed air dryer. [Solution] The filter of the embodiment is provided in a compressed air drying apparatus for removing oil and moisture from compressed air containing oil and moisture. The filter is a filter material laminate arranged in a cylindrical container of the compressed air drying apparatus through which compressed air flows, so as to block the flow path of compressed air within the container. The filter material laminate is made up of a plurality of filter material sheets stacked together, and the filter material laminate is arranged in the container so as to coincide with the flow direction of the flow path. The filter material laminate has an outer circumference shape that allows the outer circumference ends of the filter material sheets to move within the container in the flow direction of the flow path while being supported by the circumferential inner wall of the container or maintaining a gap between them and the inner wall. The filter material sheets are integrated so as not to separate from each other in the stacking direction.

Claims

1. A filter provided in a compressed air drying apparatus for removing oil and moisture from compressed air containing oil and moisture, The filter is a filter material laminate disposed in a cylindrical container of a compressed air drying apparatus through which compressed air flows, so as to block the flow path of compressed air within the container, wherein the filter material laminate is made up of a plurality of filter material sheets stacked together, and the filter material laminate is disposed in the container such that the stacking direction of the filter material sheets coincides with the flow direction of the flow path, The filter media laminate has an outer circumference shape that allows it to move within the container in the flow direction of the flow path while the outer circumference end of the filter media sheet is supported by the circumferential inner wall of the container or while maintaining a gap between itself and the inner wall. The filter for a compressed air drying apparatus is characterized in that the filter media sheets are integrated so as not to be separated from each other in the stacking direction.

2. The filter for a compressed air drying apparatus according to claim 1, wherein two filter sheets adjacent to each other in the stacking direction are joined to each other.

3. The filter for a compressed air drying apparatus according to claim 2, wherein the two filter media sheets are joined together over the entire surface of the surfaces that are in contact with each other.

4. The filter for a compressed air dryer according to claim 3, wherein the two filter media sheets are joined together by an adhesive applied to the entire surface of the surfaces that come into contact with each other.

5. The aforementioned filter sheet is made of fibrous material, The filter for a compressed air dryer according to claim 3, wherein the two filter sheets are joined together by a binder resin attached to the fibers of the fibrous material.

6. The filter for a compressed air drying apparatus according to claim 2, wherein the two filter media sheets are joined to each other in multiple regions that are spaced apart from each other within the plane of the surfaces that are in contact with each other.

7. The filter for a compressed air drying apparatus according to claim 1, further comprising an outer peripheral connecting member that extends in the stacking direction of the filter material sheets and is adhered to the filter material sheets on the outer peripheral end face of the filter material stack, thereby connecting the filter material sheets together.

8. The outer peripheral connecting member has a plurality of tape materials that extend linearly in the stacking direction of the filter material sheet at a plurality of positions spaced apart in the circumferential direction of the filter material sheet, The filter for a compressed air drying apparatus according to claim 7, wherein both ends of the tape material are fixed to the surfaces of two filter sheets located at both ends in the stacking direction of the filter sheet, the surfaces facing outward from the stacked filter sheet.

9. The filter for a compressed air drying apparatus according to claim 7, wherein the outer peripheral connecting member is a covering material provided to cover the outer peripheral end face of the filter material laminate over the entire circumferential direction of the filter material sheet.

10. The filter for a compressed air drying apparatus according to claim 1, further comprising a fastener that penetrates the inner circumference of the filter material sheet located on the inner circumference side with respect to the outer circumference end of the filter material sheet in the stacking direction and is fixed therein, thereby preventing the inner circumferences of adjacent filter material sheets from separating in the stacking direction.

11. Each of the filter media sheets has an internal hole in the inner circumference of the filter media sheet located on the inner circumference side relative to the outer circumference end, which forms a through hole that penetrates the filter media stack in the stacking direction. The filter for a compressed air drying apparatus according to claim 1, further comprising an inner circumferential connecting member that connects the filter material sheets together by being arranged to fill the space within the through-hole.

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