KR-20260067632-A - High pressure compressed air purifier

KR20260067632AKR 20260067632 AKR20260067632 AKR 20260067632AKR-20260067632-A

Abstract

The present invention relates to a high-pressure compressed air purifier for an air brake system applied to a commercial vehicle, comprising: an outer housing having a first opening formed at its lower portion and a first internal space connected to the first opening; a spring located at the ceiling of the first internal space of the outer housing; a purifier inserted into the first internal space of the outer housing and elastically supported by the spring, purifying moisture, oil, and foreign substances contained in the compressed air introduced into the first internal space through the first opening; and a plate seaming cap coupled to the rim of the first opening and the lower portion of the purifier to fix the purifier within the outer housing. Herein, the purifier comprises: an inner housing having a second opening formed at its upper portion opposite the first opening, a second internal space connected to the second opening, and a plurality of ventilation holes formed on the bottom surface of the second internal space; a fiber mesh installed on the bottom surface of the second internal space; a desiccant filled in the second internal space above the fiber mesh; and an upper cap covering the second opening and having a plurality of air inlet holes formed on the surface facing the bottom surface of the internal space. It includes: an oil absorbent sheet installed on the upper part of the upper cap and covering the plurality of air inlet holes; a holder coupled to the upper cap to fix the oil absorbent sheet and having a plurality of air passage holes formed on a surface facing the oil absorbent sheet; and a base plate coupled to the lower part of the inner housing, forming forward and reverse flow paths for filtering and regenerating compressed air, and having the plate seaming cap coupled to the lower part.

Inventors

박상선

Assignees

주식회사 에스비텍

Dates

Publication Date: 20260513
Application Date: 20241106

Claims (8)

An external housing having a first opening formed at the bottom and a first internal space connected to the first opening; A spring located on the ceiling of the first internal space of the above-mentioned external housing; A purifier inserted into the first internal space of the outer housing and elastically supported by the spring, and purifying moisture, oil, and foreign substances contained in the compressed air introduced into the first internal space through the first opening; and A plate seaming cap that is coupled to the edge of the first opening and the lower part of the purifier and secures the purifier within the outer housing; The above purifier is, An inner housing having a second opening formed on the upper side opposite to the first opening, having a second internal space connected to the second opening, and having a plurality of ventilation holes formed on the bottom surface of the second internal space; A fiber net installed on the bottom surface of the second internal space; A desiccant filled in the second internal space above the fiber mesh; An upper cap covering the second opening and having a plurality of air inlet holes formed on the surface facing the bottom surface of the second internal space; Oil absorbent sheet installed on the upper part of the upper cap and covering the plurality of air inlet holes; A holder coupled to the upper cap to fix the oil absorbent sheet, with a plurality of air passage holes formed on the surface facing the oil absorbent sheet; and A base plate coupled to the lower part of the inner housing, forming forward and reverse flow paths for filtering and regenerating compressed air, and having the plate seaming cap coupled to the lower part; High-pressure compressed air purifier including
In paragraph 1, When filtering compressed air introduced from the outside, the compressed air passes through the base plate, rises between the outer housing and the inner housing, and then descends, passing through the purifier, thereby removing moisture, oil, and foreign substances contained in the compressed air. A high-pressure compressed air purifier characterized by the fact that, when regenerating using filtered compressed air from an air tank, the filtered compressed air flows back into the purifier to regenerate the purifier.
In paragraph 2, the upper cap is, An inclined surface on which the oil absorbent sheet is installed, inclined downward in a conical shape with respect to the center of the upper part of the inner housing, and an inclined portion having a plurality of air inlet holes formed on the inclined surface; and A connecting part formed on the edge of the inclined portion and coupled to the edge of the upper part of the inner housing; A high-pressure compressed air purifier characterized by including
In paragraph 3, A high-pressure compressed air purifier characterized in that the inclined portion has an insertion groove formed in the center into which a part of the spring is inserted, and the insertion groove is formed to be recessed downward from the top of the inclined surface.
In paragraph 4, the upper cap is, An oil guide is formed on the upper portion of each of the plurality of air inlet holes to guide the oil adsorbed on the oil absorbent sheet to bypass the air inlet holes when it flows downward by gravity. A high-pressure compressed air purifier characterized by having vent grooves formed on the rim connecting the inclined portion and the connecting portion to discharge oil that has moved down below the inclined portion by the oil guide.
In paragraph 4, The above-mentioned connecting part is connected to the edge of the inner housing with a cross-section in the shape of '∩', and A high-pressure compressed air purifier characterized by having an elastic gasket interposed between the joint and the rim of the inner housing.
In paragraph 4, the holder is, A fitting part inserted into the above insertion groove and into which the spring is fitted; A contact portion connected to the above fitting portion, which presses the oil absorbent sheet against the inclined portion of the upper cap and has a plurality of air passage holes formed therein; and A fixing part connected to the above-mentioned contact part and fixed to the outer surface of the coupling part of the upper cap; A high-pressure compressed air purifier characterized by including
In paragraph 1, the inner housing is, A double-structured hook formed at the bottom and fixing the base plate by interposing an O-ring; comprising The above double-structured hook is, A pressure hook having a ring-shaped dam structure that presses the O-ring interposed between the base plate and the lower part of the inner housing; A plurality of coupling hooks individually formed around the circumference of the above-mentioned pressure hook, having a tension section relatively longer than the above-mentioned pressure hook, and coupled to the base plate in a hooking manner; A high-pressure compressed air purifier characterized by including

Description

High pressure compressed air purifier The present invention relates to an air brake system applied to commercial vehicles, and more specifically, to a high-pressure compressed air purifier that purifies moisture, oil, and foreign substances contained in compressed air and supplies it to an air tank. The Electronic Air Processing Unit (EAPU) system, an air brake system applied to commercial vehicles such as trucks and buses, is basically a system that protects pneumatic devices that will use compressed air after filtering out moisture, oil, and foreign substances contained in the compressed air generated by an air compressor. This EAPU system consists of an air compressor, EAPU VALVE assembly, ECU, air tank, brake chamber, suspension bellows, sep cooler, 3-way valve, etc. The configuration of the EAPU system is briefly described as follows. The air compressor receives the operating signal from the EAPU and supplies compressed air to the air tank through the EAPU VALVE. The EAPU VALVE assembly receives vehicle information and intelligently controls the air compressor to supply filtered compressed air to each air tank and controls the intelligent regeneration of the filter. The EAPU VALVE assembly includes a high-pressure compressed air purifier that filters moisture, oil, and foreign substances from the compressed air introduced from the air compressor. The ECU controls the vehicle's engine and electronic units. The air tank receives and stores compressed air filtered from a high-pressure compressed air purifier to operate pneumatic components of commercial vehicles, such as suspension, braking brakes, and parking brakes. The brake chamber uses pneumatic pressure to operate the brake caliper, generating braking force through the friction between the disc and the pad. Suspension bellows mitigate vertical vibrations generated during driving on passengers and cargo located above the suspension system. Korean Patent Publication No. 10-2022-0075784 (published June 8, 2022) discloses an "intelligent EAPU module for commercial vehicles." However, the cartridge (high-pressure compressed air purifier) of the prior art had problems such as the cumbersome installation of oil absorbent sheets for oil absorption, and leakage occurring at connection points requiring airtightness due to impact, etc., which resulted in compressed air being supplied directly to the commercial vehicle without oil removal, foreign substance removal, or dehumidification, potentially causing serious damage to the commercial vehicle. FIG. 1 is a partially cutaway perspective view showing a high-pressure compressed air purifier according to an embodiment of the present invention. Figure 2 is a partial cross-sectional view showing the upper part of the high-pressure compressed air purifier of Figure 1. Figure 3 is an enlarged view of part A of Figure 2, showing the state in which the upper cap is joined to the inner housing with an elastic gasket interposed therebetween. Figure 4 is an enlarged view of part B of Figure 2, showing the state in which a part of the spring is inserted into the insertion groove of the upper cap. Figure 5 is an enlarged view of part C of Figure 2, showing the state in which the holder is fixed to the upper cap. Figure 6 is a drawing showing the state in which an oil absorbent sheet is interposed between the upper cap and the holder of Figure 1. Figure 7 is an enlarged view showing the inclined portion of the upper cap of Figure 6. Figure 8 is a diagram showing the simulation results of the flow of compressed air in a high-pressure compressed air purifier according to the prior art. FIG. 9 is a bottom perspective view showing an inner housing having a double-structured hook of FIG. 1. FIG. 10 is an enlarged view showing the base plate of FIG. 1 hermetically fixed by a double-structured hook of the inner housing. It should be noted that in the following description, only the parts necessary for understanding the embodiments of the present invention are explained, and the description of other parts will be omitted to the extent that it does not deviate from the gist of the present invention. The terms and words used in the specification and claims described below should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely preferred embodiments of the invention and do not represent all aspects of the technical spirit of the invention; therefore, it should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application. Hereinafter, embodiments of the present invention will be described in