CN113324352B - Unidirectional drying filter - Google Patents
Unidirectional drying filter Download PDFInfo
- Publication number
- CN113324352B CN113324352B CN202010128662.2A CN202010128662A CN113324352B CN 113324352 B CN113324352 B CN 113324352B CN 202010128662 A CN202010128662 A CN 202010128662A CN 113324352 B CN113324352 B CN 113324352B
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- filter element
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- 238000001035 drying Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims description 23
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 description 10
- 239000003507 refrigerant Substances 0.000 description 7
- 239000003365 glass fiber Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 238000004080 punching Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention provides a unidirectional drying filter, which comprises a cylinder, wherein a filter element and a spring are arranged in the cylinder, the filter element is propped against the spring along the axial direction of the cylinder, the projection of the filter element and the spring on any plane passing through the central axis of the cylinder is provided with an overlapping part, and the filter element can prop against the spring along the radial direction of the cylinder. When the filter element of the unidirectional drying filter is to radially offset in the cylinder body, the spring can limit the radial offset of the filter element, so that the filter element has better stability in the cylinder body.
Description
Technical Field
The invention relates to the technical field of refrigeration control, in particular to a unidirectional drying filter.
Background
In an air conditioner or refrigeration system, a one-way dry filter is typically provided in the suction line of the compressor for drying moisture in the refrigerant and filtering solid impurities in the refrigerant to maintain proper operation of the air conditioner and refrigeration equipment.
Referring to fig. 1-2, fig. 1 is a schematic structural view of an embodiment of a unidirectional dry filter in the background art, and fig. 2 is an exploded view of fig. 1.
As shown in fig. 1 and 2, the unidirectional dry filter in the background art comprises an inlet end cylinder 01 and an outlet end cylinder 07, which enclose to form an installation cavity, and a spring 02, a parallel punching net 03, a metal filter screen 04, a filter element 05, a glass fiber filter screen 06, a metal filter screen 04 and a parallel punching net 03 are sequentially arranged in the installation cavity from the inlet end to the outlet end. In the mounted state, the parallel punching net 03 and the metal filter screen 04 are positioned between the filter element 05 and the spring 02.
In this assembled state, the spring 02 provides only axial pressure to the filter insert 05.
Disclosure of Invention
The invention provides a unidirectional drying filter, which comprises a cylinder, wherein a filter element and a spring are arranged in the cylinder, the filter element is propped against the spring along the axial direction of the cylinder, the projection of the filter element and the spring on any plane passing through the central axis of the cylinder is provided with an overlapping part, and the filter element can prop against the spring along the radial direction of the cylinder.
When the filter element of the unidirectional drying filter is to radially offset in the cylinder body, the spring can limit the radial offset of the filter element, so that the filter element has better stability in the cylinder body.
Drawings
FIG. 1 is a schematic view of a structure of an embodiment of a unidirectional dry filter in the background art;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a schematic view showing the structure of a unidirectional dry filter according to a first embodiment of the present invention;
FIG. 4 is a cross-sectional view of FIG. 3;
FIG. 5 is an exploded view of FIG. 3;
FIG. 6 is a view of the filter positioning member before and after assembly;
FIG. 7 is a schematic view of a unidirectional dry filter according to a second embodiment of the present invention;
FIG. 8 is another construction of a unidirectional dry filter in accordance with a first embodiment of the present invention;
Fig. 9 is another structure of the unidirectional dry filter according to the second embodiment of the present invention.
The reference numerals in fig. 1-2 are illustrated as follows:
01 inlet end cylinder, 02 spring, 03 parallel punching net, 04 metal filter screen, 05 filter core, 06 glass fiber filter screen, 07 outlet end cylinder.
The reference numerals of fig. 3-6 are illustrated as follows:
1a cylinder body, 11 an outlet end cover part, 111 a conical outlet section, 112 a first outlet ring section, 113 an outlet flanging, 114 a second outlet ring section, 115 an outlet connecting pipe, 12a cylinder part, 13 an inlet end cover part, 131 a conical inlet section, 132 a first inlet ring section, 133 an inlet flanging, 134a second inlet ring section and 135 an inlet connecting pipe;
2 an inlet pipe;
3, an outlet pipe;
4 filter element, 41 body part, 411 body abutting part, 42 protruding part, 421 protruding limit part, 43 concave part, 431 concave abutting part, 432 concave limit part, 44 open slot, 45 annular part, 451 annular inner wall;
5, a spring;
6 filter support device, 61 filter positioning component, 611 axial filter positioning portion, 612 circumference filter positioning portion, 62 support net piece.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The terms "first," "second," and the like herein are merely used for convenience in describing two or more structures or components having the same or similar structure, and do not denote any particular limitation of the order.
Referring to fig. 3-6, fig. 3 is a schematic structural diagram of a unidirectional dry filter according to an embodiment of the present invention, fig. 4 is a cross-sectional view of fig. 3, fig. 5 is an exploded view of fig. 3, and fig. 6 is a state diagram of a filter positioning member before and after assembly.
As shown in fig. 3 and 4, the invention provides a unidirectional drying filter, which comprises a cylinder 1, wherein a filter element 4 and a spring 5 are arranged in the cylinder 1, the spring 5 is in a compressed state, the filter element is abutted against the spring 5 along the axial direction of the cylinder, an overlapping part exists between the projection of the filter element 4 and the spring 5 on any plane passing through the central axis of the cylinder 1, and the filter element 4 can be abutted against the spring 5 along the radial direction of the cylinder 1.
Specifically, the two axial ends of the cylinder 1 are respectively provided with an inlet pipe 2 and an outlet pipe 3 which are used for being connected with a pipeline in a refrigerating system; the cartridge 1 is further provided with a filter element 4, the filter element 4 includes a body portion 41 and a protrusion portion 42, the protrusion portion 42 of the filter element 4 is substantially in a structure protruding along the body portion 41 toward the inlet pipe side, and in this embodiment, the protrusion portion 42 is substantially in a cylindrical shape. The body portion 41 of the filter element 4 includes a body abutment portion 411, the protruding portion 42 includes a protruding limiting portion 421, the protruding limiting portion 421 is located on an axial outer surface of the protruding portion 42, and the body abutment portion 411 and the protruding limiting portion 421 are substantially in a step-like structure in a sectional view.
In addition, the unidirectional drying filter provided in this embodiment further includes a spring 5, where the spring 5 is in a compressed state, two ends of the spring 5 respectively abut against the inner wall of the cylinder 1 and the body abutting portion 411, and specifically, one end of the spring 5 abutting against the body abutting portion 411 is sleeved on the protruding portion 42.
According to the unidirectional drying filter provided by the invention, the two ends of the spring 5 are respectively propped against the inner wall of the cylinder body 1 and the filter element 4, one end of the spring 5 propped against the filter element 4 is sleeved on the protruding part 42, the protruding limiting part 421 of the unidirectional drying filter can play a role in guiding the assembly of the spring 5, and the end part of the spring 5 can be propped against the body propping part 411 under the action of the compression force of the spring 5, so that the stabilizing effect of the filter element 4 is better. In this way, during the use process, the protruding limiting part 421 can also play a role of a spring column, when the unidirectional drying filter is vibrated to enable the filter element 4 to deviate radially in the cylinder 1, the protruding limiting part 421 can be contacted with the spring 5, and the filter element 4 can be subjected to the force of the spring 5 along the radial direction of the filter element 4 (opposite to the direction of deviation of the filter element 4) so as to limit the radial deviation of the filter element 4 in the cylinder 1, and the stability of the filter element 4 in the cylinder 1 is better; in addition, the connection reliability between the spring 5 and the filter element 4 is higher, friction is not easy to generate due to system vibration, the filter element 4 is not easy to damage, and the service life is longer.
In addition, because the spring 5 is installed on the protruding part 42 of the filter element 4 in a sleeved mode, the space inside the spring 5 is fully utilized, compared with the background art, more space can be used for installing the filter element 4 in the cylinder 1 of the unidirectional dry filter provided by the invention, so that the volume of the filter element 4 can be increased under the condition of the same product volume, and the capacity of drying and filtering can be improved, and the axial length of the cylinder 1 can be reduced under the condition of the filter element 4 with the same volume, so that the occupied space of the whole unidirectional dry filter in a system is reduced, the structure of the unidirectional dry filter is smaller, the unidirectional dry filter can be conveniently installed, and the structural compactness of the system is improved.
In a specific scheme, the filter support device 6 can be further included, and the filter support device 6 can be installed at the end of the cylinder 1 close to the outlet pipe 3 and position the end of the filter element 4 close to the outlet pipe 3; the filter support device 6 may include a filter positioning member 61, the filter positioning member 61 may include an axial filter positioning portion 611, an outer edge of the axial filter positioning portion 611 may be provided with a circumferential filter positioning portion 612 extending in an axial direction, and the circumferential filter positioning portion 612 may be located at one axial side of the axial filter positioning portion 611.
In the assembled state, the axial filtering positioning part 611 can be propped against the end part of the filter element 4, which is close to the outlet pipe 3, so that the filter element can be used for fine filtering after the filter element 4, and the filtering effect can be further improved; the circumferential filtering positioning portion 612 may be filled between the outer peripheral wall of the end portion of the filter element 4 near the outlet pipe 3 and the inner peripheral wall of the cylinder 1, so as to position the filter element 4 in the radial direction, and by combining the cooperation of the spring 5 and the diameter-reduced end portion 41, the fixation of the filter element 4 in the cylinder 1 can be ensured to a greater extent, the influence of system vibration on the filter element 4 can be eliminated more effectively, and the impact between the filter element 4 and the inner peripheral wall of the cylinder 1 is avoided.
Referring to fig. 6, the filter positioning member 61 may be a flexible filter material, such as a non-woven fabric, and fig. 6-a shows the shape of the flexible filter material in the unfolded state before assembly, and when the filter element 4 is assembled, the end of the filter element 4 near the outlet pipe 3 may be vertically placed, and then the flexible filter material is lapped on the filter element 4, and under the action of gravity, the outer edge portion of the flexible filter material will naturally be folded (folded downwards) along the axial direction to form the circumferential filter positioning portion 612, and the portion not folded along the axial direction may form the axial filter positioning portion 611, and at this time, the shape of the flexible filter material may refer to fig. 6-b.
The flexible filter material also has certain elasticity, and the scheme of press fitting can be adopted during assembly, namely the thickness of the circumferential filter positioning part 612 can be properly larger than the distance between the filter element 4 and the inner peripheral wall of the cylinder body 1, so that the packing compactness and the reliable positioning of the filter element 4 can be ensured. It is noted that only the thickness of the circumferential filter positioning portion 612 is actually required for press fitting of the flexible filter material, that is, the axial filter positioning portion 611 may employ a different thickness from the circumferential filter positioning portion 612; however, in view of reducing the difficulty in manufacturing, the embodiment of the present invention preferably uses a flexible filter material with a uniform thickness, and in this case, in order to complete the press-fitting, the thickness of the entire flexible filter material may be required to be greater than the distance between the filter element 4 and the inner peripheral wall of the cylinder 1.
In addition, due to the nature of the flexible filter material itself, it may be in flexible contact with the filter element 4, and also to a greater extent, damage to the filter element 4 during installation of the filter positioning member 61 may be avoided. Moreover, the flexible filter material also has the vibration isolation effect, so that the influence of system vibration on the filter element 4 can be better isolated.
The flexible filter material may be square in shape, and in an assembled state, at least four corners of the flexible filter material may be folded in an axial direction to form the circumferential filter positioning portion 612. Of course, the shape of the flexible filter material may be circular, diamond, triangular, or other shapes, which may be an alternative in practice.
Taking square flexible filter material as an example, the side length of the square flexible filter material can be 1.25-1.35 times of the diameter of the filter element 4, so that the outer edge of the flexible filter material can be folded along the axial direction and filled between the filter element 4 and the inner peripheral wall of the cylinder body 1, thereby forming circumferential omnibearing package for the filter element 4 and better ensuring the reliable positioning of the filter element 4 in the radial direction.
Here, the length of the circumferential filter positioning portion 612 in the axial direction is not limited in the embodiment of the present invention, and may be set by those skilled in the art according to actual needs when it is embodied. It will be appreciated that the greater the axial dimension of the circumferential filter positioning portion 612, the better the radial positioning effect on the filter cartridge 4; the smaller the axial dimension of the circumferential filter positioning portion 612, the greater the axial unfilled length of the radial gap between the filter element 4 and the cylinder 1, and the smaller the flow resistance of the unidirectional dry filter.
In the above-mentioned embodiments, the circumferential filter positioning portion 612 is formed by folding the outer edge portion of the flexible filter material in the axial direction, that is, the circumferential filter positioning portion 612 may be formed only when in use, and the flexible filter material may be formed in a flat plate shape when unfolded and laid flat; in addition, the circumferential filter positioning portion 612 may be provided to be always present, at this time, the entire filter positioning member 61 may be in a barrel shape, the barrel bottom may be the axial filter positioning portion 611, the barrel circumference may be the circumferential filter positioning portion 612, and the barrel-shaped filter positioning member 61 may be directly sleeved on the filter element 4 during assembly.
The filter support device 6 may further comprise a support net member 62, one surface of the support net member 62 may abut against the axial filter positioning portion 611, and the other surface may be supported on the inner wall of the cylinder 1, so as to define the position of the end portion of the filter element 4 near the outlet pipe 3 in the cylinder 1. The supporting net 62 is preferably made of metal, so as to improve the strength of the supporting net 62. Of course, the support net 62 may not be provided, and the filter element 4 may be abutted against the inner wall of the cylinder 1 by the filter positioning member 61.
Referring to fig. 4 and 5, the barrel 1 may include an outlet end cap portion 11 and a barrel portion 12, the outlet end cap portion 11 may include a tapered outlet section 111, a large diameter end of the tapered outlet section 111 may be provided with a first outlet ring section 112 extending radially outwards, an outer edge of the first outlet ring section 112 may be provided with an outlet flange 113, and the outlet flange 113 and the tapered outlet section 111 are respectively located at two axial sides of the first outlet ring section 112; in the assembled state, the tubular portion 12 may be inserted into the outlet end cap portion 11 and abuts against the first outlet ring segment 112, and the outlet flange 113 may be lap welded to the outer peripheral wall of the tubular portion 12, and the support mesh 62 may abut against the first outlet ring segment 112. With the adoption of the scheme, the cylindrical part 12 is firstly inserted into the outlet end cover part 11 for preliminary positioning and then welded, so that the welding operation is relatively easy, and the welding reliability is relatively high; the supporting net member 62 is positioned in a surface-to-surface contact manner with the first outlet ring segment 112, so that the contact area is large, and the reliable fixing of the supporting net member 62 is more facilitated.
The small diameter end of the conical outlet section 111 may be provided with a second outlet ring section 114 extending radially inwards, and the inner edge of the second outlet ring section 114 may be provided with outlet connection pipes 115, and the outlet connection pipes 115 and the conical outlet section 111 may be located at two axial sides of the second outlet ring section 114, respectively. In the assembled state, the connecting end of the outlet pipe 3 and the outlet end cover part 11 can be sleeved on the outlet connecting pipe 115 and propped against the second outlet ring section 114, then the outlet pipe 3 is fixed on the outlet end cover part 11 by welding and the like, and the welding operation adopting the scheme is relatively easy, the welding quality is relatively easy to control, and the connection reliability of the outlet pipe 3 and the outlet end cover part 11 can be improved.
The barrel 1 may further include an inlet end cover portion 13, where the inlet end cover portion 13 is similar to the structure of the outlet end portion 11, and still referring to fig. 4 and 5, the inlet end cover portion 13 may include a tapered inlet section 131, a large diameter end of the tapered inlet section 131 may be provided with a first inlet ring section 132 extending radially outwards, an outer edge of the first inlet ring section 132 may be provided with an inlet flange 133, and the inlet flange 133 and the tapered inlet section 131 may be respectively located at two axial sides of the first inlet ring section 132; the small diameter end of the tapered inlet section 131 may be provided with a second inlet ring section 134 extending radially inward, and the inner edge of the second inlet ring section 134 may be provided with inlet connection pipes 135, and the inlet connection pipes 135 and the tapered inlet section 131 may be located at both axial sides of the second annular inlet section 134, respectively. In the assembled state, the cylindrical part 12 can be inserted into the inlet end cover part 13 and props against the first inlet ring section 132, the inlet flange 133 and the peripheral wall of the cylindrical part 12 can be in lap welding connection so as to fixedly connect the cylindrical part 12 and the inlet end cover part 13, one end of the spring 5 can prop against the first inlet ring section 132, and when the unidirectional dry filter is influenced by vibration, the cylindrical part 12 can reduce the condition that the spring 5 is deviated towards one end of the inlet pipe 2 when the spring 5 is deviated in advance; the connecting end of the inlet pipe 2 and the inlet end cover 13 can be sleeved on the interface connection pipe 135 and propped against the second inlet ring section 134, and then the inlet pipe 2 can be fixed on the inlet end cover 13 by welding or the like.
The solution in the background art also has the problem of low utilization rate of the filter element 4, and the filter element and the cylinder body have a gap in the radial direction by taking the sectional view shown in fig. 1 as a reference, and the radial gap extends to the abutting position of the filter element and the glass fiber filter screen. With this structure, during the use, the refrigerant flows preferentially in the path with the minimum flow resistance (shown by the arrow in the figure), and the refrigerant does not basically pass through the filter element under this path, but directly passes through the glass fiber filter screen to be filtered, when this stage is finished, the glass fiber filter screen is basically completely blocked, and the resistance when the refrigerant flows to the glass fiber filter screen again through the filter element is much larger, even cannot flow, so that the problem that most of the area of the filter element is not utilized yet and the unidirectional dry filter is failed is caused.
In view of this, in the embodiment of the present invention, the end of the filter element 4 near the outlet pipe 3 may be provided with a coaxial open slot 44, and the radial dimension of the open slot 44 may gradually increase along the direction near the outlet pipe 3, and in combination with the foregoing design of the circumferential filtering positioning portion 612 for filling the gap between the outer peripheral wall of the filter element 4 and the inner peripheral wall of the cylinder 1 and the diameter-reduced end 41, the lengths of different paths (solid arrow, dotted arrow, and double-dotted arrow in fig. 4) passing through the filter element 4 may be substantially consistent, so that there is no significant difference in the flow resistance of each path, and thus the refrigerant may relatively uniformly pass through all the filter elements 4, and further, the filtering function of the filter element 4 may be more fully utilized, so as to improve the service life of the unidirectional dry filter. In specific practice, the difference in length between the paths is preferably controlled to be within 5%.
Moreover, the tapered open grooves 44 can make the outlet positions of the flow paths of the refrigerant more dispersed, which is advantageous for uniform distribution of the fluid in the cylinder 1.
Compared with the background art, the filter element 4 provided by the invention is more fully utilized, and the fixing mode of the filter element 4 in the cylinder body 1 is improved, so that the number of parts in the cylinder body 1 can be greatly reduced. In comparison with fig. 1 and 2, the solution in the background art has 5 components besides the filter element and the spring, but only two components are needed in the embodiment of the invention, so that the installation process can be greatly simplified, the flow resistance can be reduced, and the manufacturing cost of the unidirectional dry filter can be reduced.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a unidirectional dry filter according to a second embodiment of the present invention;
the second unidirectional dry filter provided by the invention comprises a cylinder body 1, wherein the two axial ends of the cylinder body 1 are respectively provided with an inlet pipe 2 and an outlet pipe 3 which are used for being connected with a pipeline in a refrigerating system; the cartridge 1 is further provided with a filter element 4, the filter element 4 includes a body portion 41 and a recess portion 43, the recess portion 43 of the filter element 4 is a structure recessed along the body portion 41 toward the inlet pipe side, in this embodiment, the recess portion 43 is substantially cylindrical, the recess portion 43 includes a recess abutment portion 431 and a recess limiting portion 432, and the recess abutment portion 431 and the recess limiting portion 432 are substantially step-like structures in cross section.
In addition, the unidirectional drying filter provided in this embodiment further includes a spring 5, where the spring 5 is in a compressed state, two ends of the spring 5 respectively abut against the inner wall of the cylinder 1 and the concave abutting portion 431, and specifically, one end of the spring 5 abutting against the concave abutting portion 431 is located in the concave portion 43.
According to the unidirectional drying filter provided by the invention, the two ends of the spring 5 are respectively propped against the inner wall of the cylinder body 1 and the filter element 4, the end of the spring 5 propped against the filter element 4 is positioned at the concave part 43, the concave limiting part 432 can play a guiding role in assembling the spring 5, and under the action of the compression force of the spring 5, the end of the spring 5 can be propped against the concave propped part 432, so that the stabilizing effect of the filter element 4 is better. Thus, when the unidirectional dry filter is vibrated to enable the filter element 4 to deviate radially in the cylinder 1 in use, the concave limiting part 432 can be contacted with the outer surface of the spring 5, the filter element 4 can be subjected to the force of the spring 5 along the radial direction of the filter element 4 (opposite to the direction of deviation of the filter element 4) so as to limit the radial deviation of the filter element 4 in the cylinder 1, and the stability of the filter element 4 in the cylinder 1 is better; in addition, the connection reliability between the spring 5 and the filter element 4 is higher, friction is not easy to generate due to system vibration, the filter element 4 is not easy to damage, and the service life is longer.
The barrel 1 may further include an inlet end cover portion 13, where the inlet end cover portion 13 is similar to the structure of the outlet end portion 11, and still referring to fig. 4 and 5, the inlet end cover portion 13 may include a tapered inlet section 131, a large diameter end of the tapered inlet section 131 may be provided with a first inlet ring section 132 extending radially outwards, an outer edge of the first inlet ring section 132 may be provided with an inlet flange 133, and the inlet flange 133 and the tapered inlet section 131 may be respectively located at two axial sides of the first inlet ring section 132; the small diameter end of the tapered inlet section 131 may be provided with a second inlet ring section 134 extending radially inward, and the inner edge of the second inlet ring section 134 may be provided with inlet connection pipes 135, and the inlet connection pipes 135 and the tapered inlet section 131 may be located at both axial sides of the second annular inlet section 134, respectively. In the assembled state, the cylindrical part 12 can be fixedly connected with the inlet end cover part 13 in a welding manner and props against the first inlet ring section 132, the inlet flange 133 and the peripheral wall of the cylindrical part 12 can be in lap joint welding so as to fixedly connect the cylindrical part 12 and the inlet end cover part 13, one end of the spring 5 can prop against the second inlet ring section 134, when the unidirectional dry filter is influenced by vibration, and when the spring 5 is pre-deflected, the conical inlet section 131 can reduce the condition that the spring 5 deflects towards one end of the inlet pipe 2; the connecting end of the inlet pipe 2 and the inlet end cover 13 can be sleeved on the interface connection pipe 135 and propped against the second inlet ring section 134, and then the inlet pipe 2 can be fixed on the inlet end cover 13 by welding or the like.
It should be noted that, the abutment described in the present invention includes direct abutment and indirect abutment, for example, the abutment of the spring 5 against the inner wall of the cylinder 1, and is not limited to the case where the spring 5 directly abuts against the cylinder 1, but also includes, for example, the case where filter paper or other parts are added to the inner wall of the cylinder 1 between the spring 5 and the inner wall of the cylinder 1, and vice versa.
In addition, in the present invention, the protruding portion 42 is substantially protruding along one side of the body 41, but the filter element 4 is not limited to be composed of only the body 41 and the protruding portion 42, for example, please refer to fig. 8 specifically, fig. 8 is another structure of the unidirectional dry filter according to the first embodiment of the present invention. The filter element 4 includes, in addition to the body 41 and the protrusion 42, a ring 45 extending from the body 41 and having a substantially hollow ring shape, the ring 45 including an annular inner wall 451 capable of restricting movement of the spring 5 near one end of the filter element 4, one end of the spring 5 abutting against the filter element 4 being sheathed on the protrusion 42, and when the filter element 4 is to be radially offset, the spring 5 abutting against the protrusion stopper 421 to restrict the radial offset of the filter element 4, but the structure does not affect the description that the protrusion 42 is a structure protruding substantially along one side of the body 41, that is, one side of the body is the side of the center of the filter element 4 in the height direction, it being understood that the protrusion 42 protrudes along one side of the body 41, and is not limited to the protrusion 42 being the most protruding position of the filter element 4.
Similarly, in the present invention, the recess 43 is generally recessed along one side of the main body 41, but the filter element 4 is not limited to only the main body 41 and the recess 43, for example, please refer to fig. 9, and fig. 9 shows another structure of the unidirectional dry filter according to the second embodiment of the present invention. The filter element includes, in addition to the body 41 and the recess 43, a substantially cylindrical structure extending along the center of the body 41, wherein one end of the spring 5 abutting against the filter element 4 is located at the recess 43, and the spring 5 abuts against the recess abutment 431, and when the filter element 4 is about to radially deflect, the spring 5 abuts against the recess abutment 432 to limit the radial deflection of the filter element 4, and the structure does not affect the description that the recess 43 is substantially recessed along the body 41, i.e., the shape of the recess 43 is not limited to a circular shape, but may be other shapes, such as a ring shape, that can limit the radial deflection of the filter element 4.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. The utility model provides a one-way dry filter, includes barrel (1), be equipped with filter core (4) and spring (5) in barrel (1), its characterized in that, spring (5) are in compression, along the axial direction of barrel (1), the both ends of spring (5) respectively with the inner wall of barrel (1) with filter core (4) offset, there is overlap portion filter core (4) with the projection of spring (5) in arbitrary plane through the central axis of barrel (1), and along the radial direction of barrel (1), filter core (4) and spring (5) can offset; the two axial ends of the cylinder body (1) are respectively provided with an inlet pipe (2) and an outlet pipe (3); the filter support device (6) is arranged at the end part of the cylinder body (1) close to the outlet pipe (3), the filter support device (6) comprises a filter positioning component (61), the filter positioning component (61) comprises an axial filter positioning part (611), the outer edge of the axial filter positioning part (611) is provided with a circumferential filter positioning part (612) extending along the axial direction, and the circumferential filter positioning part (612) is positioned at one axial side of the axial filter positioning part (611);
the axial filtering positioning part (611) is propped against the end part of the filter element (4) close to the outlet pipe (3), and the circumferential filtering positioning part (612) is filled between the outer peripheral wall of the end part of the filter element (4) close to the outlet pipe (3) and the inner peripheral wall of the cylinder body (1);
The filter element (4) comprises a body part (41) and a protruding part (42), the protruding part (42) is approximately of a structure protruding along one side of the body part (41), the body part (41) comprises a body abutting part (411), and the protruding part (42) comprises a protruding limiting part (421); two ends of the spring (5) are respectively propped against the body propping part (411) and the inner wall of the cylinder body (1), one end of the spring (5) propped against the body propping part (411) is sleeved on the protruding part (42), and the protruding limiting part (421) can prop against the spring (5); or alternatively
The filter element (4) comprises a body part (41) and a concave part (43), wherein the concave part (43) is of a structure which is concave along one side of the body part (41), and the concave part (43) comprises a concave abutting part (431) and a concave limiting part (432); both ends of the spring (5) are respectively abutted against the concave abutting part (431) and the inner wall of the cylinder body (1), one end of the spring (5) abutted against the concave abutting part (431) is located at the concave part (43), and the concave limiting part (432) can be in contact with the spring (5).
2. A unidirectional dry filter as claimed in claim 1, wherein the filter positioning member (61) is a flexible filter material, an outer edge portion of which can be folded axially in an assembled state to form the circumferential filter positioning portion (612), and a portion which is not folded axially forms the axial filter positioning portion (611).
3. A unidirectional drying filter as claimed in claim 2, wherein the flexible filter material is square in shape, and in an assembled condition, at least four corners of the flexible filter material are axially foldable.
4. A unidirectional dry filter as claimed in claim 3, characterized in that the side length of the flexible filter material is 1.25-1.35 times the diameter of the filter cartridge (4).
5. A unidirectional drying filter according to any one of claims 1-4, wherein the filter support means (6) further comprises a support mesh (62), one side of the support mesh (62) being in abutment with the axial filter positioning portion (611) and the other side being supported on the inner wall of the cylinder (1).
6. A unidirectional dry filter as claimed in claim 1, wherein the cartridge (1) comprises an outlet end cap portion (11) and a cylindrical portion (12), the outlet end cap portion (11) comprising a tapered outlet section (111), the large diameter end of the tapered outlet section (111) being provided with a first outlet ring section (112) extending radially outwards, the outer edge of the first outlet ring section (112) being provided with outlet flanges (113), the tapered outlet section (111) being located on axial sides of the first outlet ring section (112), respectively;
In the assembled state, the cylindrical part (12) is inserted into the outlet end cover part (11) and is propped against the first outlet ring section (112), and the outlet flanging (113) is welded and fixed with the outer peripheral wall of the cylindrical part (12).
7. The unidirectional dry filter of claim 6, wherein the cartridge (1) further comprises an inlet end cap portion (13), the inlet end cap portion (13) comprising a tapered inlet section (131), a large diameter end of the tapered inlet section (131) being provided with a first inlet collar section (132) extending radially outwards, an outer edge of the first inlet collar section (132) being provided with inlet flanges (133), the inlet flanges (133) and the tapered inlet section (131) being located on axial sides of the first inlet collar section (132), respectively;
The cylindrical part (12) is fixedly connected with the inlet end cover part (13) and is propped against the first inlet ring section (132), the inlet flanging (133) is lapped and welded with the outer peripheral wall of the cylindrical part (12), and one end of the spring (5) is propped against the first inlet ring section (132).
8. A unidirectional dry filter as claimed in any one of claims 1 to 4, 6 to 7, wherein the cartridge (1) further comprises an inlet end cap portion (13), the inlet end cap portion (13) comprising a tapered inlet section (131), the minor diameter end of the tapered inlet section (131) being provided with a radially inwardly extending second inlet collar section (134); one end of the spring (5) is propped against the second inlet ring section (134).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010128662.2A CN113324352B (en) | 2020-02-28 | 2020-02-28 | Unidirectional drying filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010128662.2A CN113324352B (en) | 2020-02-28 | 2020-02-28 | Unidirectional drying filter |
Publications (2)
| Publication Number | Publication Date |
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| CN113324352A CN113324352A (en) | 2021-08-31 |
| CN113324352B true CN113324352B (en) | 2024-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010128662.2A Active CN113324352B (en) | 2020-02-28 | 2020-02-28 | Unidirectional drying filter |
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| Country | Link |
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| CN (1) | CN113324352B (en) |
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| CN110152463A (en) * | 2019-06-24 | 2019-08-23 | 十堰莱安汽车零部件有限公司 | A kind of dryer cartridge structure of car dryer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| BRPI0410766A (en) * | 2003-05-19 | 2006-06-27 | Wabco Automotive Uk Ltd | air dryer cartridge |
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| US4557834A (en) * | 1983-05-13 | 1985-12-10 | Pall Corporation | Fluid filter with axial and circumferential seal |
| CN201218638Y (en) * | 2007-12-04 | 2009-04-08 | 浙江盾安人工环境设备股份有限公司 | Filter |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113324352A (en) | 2021-08-31 |
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