CN113324352A - One-way drying filter - Google Patents
One-way drying filter Download PDFInfo
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- CN113324352A CN113324352A CN202010128662.2A CN202010128662A CN113324352A CN 113324352 A CN113324352 A CN 113324352A CN 202010128662 A CN202010128662 A CN 202010128662A CN 113324352 A CN113324352 A CN 113324352A
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- 238000001035 drying Methods 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims description 24
- 238000003466 welding Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 239000003507 refrigerant Substances 0.000 description 8
- 239000003365 glass fiber Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 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
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 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
- 238000002955 isolation Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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Classifications
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- 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 one-way drying filter, which comprises a cylinder, wherein a filter element and a spring are arranged in the cylinder, the filter element is abutted 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 has an overlapping part, and the filter element and the spring can be abutted against each other along the radial direction of the cylinder. When the filter element of the unidirectional dry filter wants to radially deviate in the cylinder body, the spring can limit the radial deviation of the filter element, so that the stability of the filter element in the cylinder body is better.
Description
Technical Field
The invention relates to the technical field of refrigeration control, in particular to a one-way drying filter.
Background
In an air conditioning or refrigeration system, a one-way filter drier is generally disposed in a suction line of a compressor to dry moisture in a refrigerant and filter solid impurities in the refrigerant, so as to maintain normal operation of the air conditioning and refrigeration equipment.
Referring to fig. 1-2, fig. 1 is a schematic structural diagram of an embodiment of a unidirectional dry filter in the related art, and fig. 2 is an exploded view of fig. 1.
As shown in fig. 1 and 2, the one-way drying filter in the background art includes an inlet end cylinder 01 and an outlet end cylinder 07, which enclose to form an installation cavity, and in the installation cavity, a spring 02, a parallel punching mesh 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 mesh 03 are sequentially disposed from the inlet end to the outlet end. In the installation state, the parallel punching mesh 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 exerts pressure on the filter insert 05 only in the axial direction.
Disclosure of Invention
The invention provides a one-way drying filter, which comprises a cylinder, wherein a filter element and a spring are arranged in the cylinder, the filter element is abutted 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 has an overlapping part, and the filter element and the spring can be abutted against each other along the radial direction of the cylinder.
When the filter element of the unidirectional dry filter wants to radially deviate in the cylinder body, the spring can limit the radial deviation of the filter element, so that the stability of the filter element in the cylinder body is better.
Drawings
FIG. 1 is a schematic diagram of a prior art one-way filter-drier configuration;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a schematic structural view of a first embodiment of a one-way filter-drier according to 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 structural diagram of a one-way filter-drier according to a second embodiment of the present invention;
FIG. 8 is another construction of the unidirectional dry filter of the first embodiment provided in the present invention;
fig. 9 is another structure of a unidirectional dry filter of a second embodiment provided in accordance with the present invention.
The reference numerals in fig. 1-2 are illustrated as follows:
01 inlet end cylinder body, 02 spring, 03 parallel punching mesh, 04 metal filter screen, 05 filter element, 06 glass fiber filter screen and 07 outlet end cylinder body.
The reference numerals of fig. 3-6 are illustrated as follows:
1, a cylinder body, 11 outlet end cover parts, 111 conical outlet end sections, 112 first outlet ring sections, 113 outlet flanging, 114 second outlet ring sections, 115 outlet connecting pipes, 12 cylinder parts, 13 inlet end cover parts, 131 conical inlet sections, 132 first inlet ring sections, 133 inlet flanging, 134 second inlet ring sections and 135 inlet connecting pipes;
2, an inlet pipe;
3 an outlet pipe;
4 filter element, 41 body part, 411 body abutting part, 42 projecting part, 421 projecting limiting part, 43 recessed part, 431 recessed abutting part, 432 recessed limiting part, 44 open slot, 45 annular part, 451 annular inner wall;
5, a spring;
6 filter support means, 61 filter positioning means, 611 axial filter positioning means, 612 circumferential filter positioning means, 62 support the mesh.
Detailed Description
In order to make the technical solutions 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, as used herein are used for convenience only to describe two or more structures or components that are the same or similar in structure, and do not denote any particular limitation on the order.
Referring to fig. 3-6, fig. 3 is a schematic structural view of an embodiment of a unidirectional dry filter provided in 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 present invention provides a one-way 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, the filter element 4 and the spring 5 have an overlapping part in the projection of any plane passing through the central axis of the cylinder 1, and the filter element 4 and the spring 5 can be abutted along the radial direction of the cylinder 1.
Specifically, an inlet pipe 2 and an outlet pipe 3 are respectively arranged at the two axial ends of the cylinder body 1 and are used for being connected with a pipeline in a refrigeration system; also provided in the cartridge body 1 is a filter cartridge 4, the filter cartridge 4 comprising a body portion 41 and a projection 42, the projection 42 of the filter cartridge 4 being substantially of a configuration projecting along the body portion 41 towards the inlet tube, in this embodiment the projection 42 is substantially cylindrical. The body portion 41 of the filter element 4 includes a body abutting portion 411, the protruding portion 42 includes a protruding limiting portion 421, the protruding limiting portion 421 is located on the axial outer surface of the protruding portion 42, and the body abutting portion 411 and the protruding limiting portion 421 are substantially step-like structures in a cross-sectional view.
In addition, the one-way dry filter provided by this embodiment further includes a spring 5, 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, specifically, one end of the spring 5 abutting against the body abutting portion 411 is sleeved on the protruding portion 42.
According to the one-way drying filter provided by the invention, two ends of the spring 5 respectively abut against the inner wall of the cylinder body 1 and the filter element 4, one end of the spring 5 abutting against the filter element 4 is sleeved outside the protruding part 42, the protruding limiting part 421 can play a guiding role in assembling the spring 5, the end part of the spring 5 can abut against the body abutting part 411 under the action of the compression force of the spring 5, and the filter element 4 has a good stabilizing effect. Therefore, in the using process, the protruding limiting part 421 can also play a role of a spring column, when the unidirectional dry filter is vibrated to enable the filter element 4 to be deflected in the radial direction in the cylinder 1, the protruding limiting part 421 can be in contact with the spring 5, and the filter element 4 can be subjected to the force of the spring 5 in the radial direction of the filter element 4 (opposite to the direction in which the filter element 4 is deflected) to limit the radial deflection of the filter element 4 in the cylinder 1, so that 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 high, friction is not easily generated due to system vibration, the filter element 4 is not easily damaged, and the service life is longer.
In addition, because the spring 5 is sleeved on the projecting part 42 of the filter element 4, the space inside the spring 5 is fully utilized, compared with the background technology, the cylinder 1 of the one-way drying filter provided by the invention can have more space for installing the filter element 4, so that under the condition of the same product volume, the volume of the filter element 4 can be increased, and further the drying and filtering capacity can be improved, and under the condition of the filter element 4 with the same volume, the axial length of the cylinder 1 can be reduced, so that the occupied space of the whole one-way drying filter in the system is reduced, the structure of the one-way drying filter is smaller and more exquisite, the installation can be conveniently carried out, and the structure compactness of the system is favorably improved.
In a specific scheme, the filter support device 6 can be further included, the filter support device 6 can be arranged at the end part of the barrel body 1 close to the outlet pipe 3, and the filter element 4 is positioned at the end part close to the outlet pipe 3; the filter support means 6 may include the filter positioning member 61, the filter positioning member 61 may include the 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 the axial direction, and the circumferential filter positioning portion 612 may be located on one axial side of the axial filter positioning portion 611.
In the assembled state, the axial filter positioning part 611 can abut against the end part of the filter element 4 close to the outlet pipe 3, and can be used for fine filtering after the filter element 4, so that the filtering effect can be further improved; the circumferential filter positioning portion 612 can be filled between the outer circumferential wall of the end portion of the filter element 4 close to the outlet pipe 3 and the inner circumferential wall of the cylinder 1 to radially position the filter element 4, and in combination with the cooperation of the spring 5 and the reducing end portion 41, the fixing of the position 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 more effectively eliminated, and the impact between the filter element 4 and the inner circumferential wall of the cylinder 1 can be avoided.
With reference to fig. 6, the filter positioning component 61 may be a flexible filter material, such as a non-woven fabric, etc., fig. 6-a shows the shape of the flexible filter material in an unfolded state before assembly, and when the filter cartridge 4 is assembled, the filter cartridge 4 may be placed vertically, and one end of the filter cartridge 4 near the outlet pipe 3 may be upward, and then the flexible filter material is overlapped on the filter cartridge 4, and under the action of gravity, the outer edge portion of the flexible filter material will naturally be folded (folded downward) in the axial direction to form the circumferential filter positioning portion 612, and the portion that is not folded in the axial direction may form the axial filter positioning portion 611, 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 a press-fitting scheme 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 filling compactness and the reliable positioning of the filter element 4 can be ensured. It should be noted that the press-fitting of the flexible filter material actually requires only the thickness of circumferential filter positioning portion 612, that is, axial filter positioning portion 611 may have a different thickness from circumferential filter positioning portion 612; however, in consideration of reducing the manufacturing difficulty, the embodiment of the present invention preferably uses a flexible filter material with a uniform thickness, and at this time, 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 circumferential wall of the cylinder 1.
In addition, due to the characteristics of the flexible filter material, the flexible filter material can be in flexible contact with the filter element 4, and damage to the filter element 4 caused by the filter positioning component 61 in the installation process can be avoided to a greater extent. Moreover, the flexible filter material also has the effect of vibration isolation, and can better isolate the influence of system vibration on the filter element 4.
The shape of the flexible filter material may be square, and in an assembled state, at least four corners of the flexible filter material may be folded in the 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 option for specific implementations.
Taking a square flexible filter material as an example, the side length of the square flexible filter material can be set to 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 turned over along the axial direction and filled between the filter element 4 and the inner peripheral wall of the cylinder body 1, and the filter element 4 can be wrapped in a circumferential all-round manner, so that the reliable positioning of the filter element 4 in the radial direction can be better ensured.
Here, the length of the circumferential filter positioning portion 612 in the axial direction is not limited in the embodiments of the present invention, and in the specific implementation, a person skilled in the art may set the length according to actual needs. It will be appreciated that the greater the axial dimension of the circumferential filter positioning portion 612, the better the radial positioning effect of the filter insert 4; the smaller the axial dimension of the circumferential filter positioning portion 612, the longer the radial gap between the filter element 4 and the cylinder 1 is not filled in the axial direction, and the smaller the flow resistance of the unidirectional dry filter.
In the above solution, the circumferential filter positioning portions 612 are formed by folding the outer edge portions of the flexible filter material in the axial direction, that is, the circumferential filter positioning portions 612 may be formed only when in use, and the flexible filter material may be flat when being unfolded and laid flat; in addition, the circumferential filter positioning portion 612 can be always present, at this time, the entire filter positioning member 61 can be a barrel shape, the bottom of the barrel is the axial filter positioning portion 611, the periphery of the barrel can be the circumferential filter positioning portion 612, and the barrel-shaped filter positioning member 61 can be directly sleeved on the filter element 4 during assembly.
The filter support means 6 may further comprise a support net 62, one side of the support net 62 may abut against the axial filter positioning portion 611, and the other side may be supported on the inner wall of the cylinder 1, so as to define the position of the end of the filter element 4 close to the outlet pipe 3 in the cylinder 1. The supporting net member 62 is preferably made of metal to improve the strength of the supporting net member 62. Of course, the support net member 62 may not be provided, and in this case, the filter element 4 is pressed against the inner wall of the cylindrical body 1 by the filter positioning member 61.
With reference to fig. 4 and 5, the cylinder 1 may include an outlet end cover 11 and a cylindrical portion 12, the outlet end cover 11 may include a tapered outlet section 111, a first outlet ring segment 112 extending radially outward may be disposed at a large-diameter end of the tapered outlet section 111, an outlet flange 113 may be disposed at an outer edge of the first outlet ring segment 112, and the outlet flange 113 and the tapered outlet section 111 are respectively located at two axial sides of the first outlet ring segment 112; in an assembled state, the cylindrical portion 12 may be inserted into the outlet end cover portion 11 and abut against the first outlet ring segment 112, the outlet flange 113 may be lap-welded to the outer peripheral wall of the cylindrical portion 12, and the support net member 62 may abut against the first outlet ring segment 112. By adopting the scheme, the cylindrical part 12 is firstly inserted into the outlet end cover part 11 for primary positioning and then is welded, so that the welding operation is relatively easy, and the welding reliability is relatively high; the supporting net member 62 is positioned in surface-to-surface contact with the first outlet ring segment 112, and the contact area is large, which is more favorable for ensuring the reliable fixation of the supporting net member 62.
The small diameter end of the conical outlet section 111 may be provided with a second outlet ring segment 114 extending radially inward, an inner edge of the second outlet ring segment 114 may be provided with an outlet connecting pipe 115, and the outlet connecting pipe 115 and the conical outlet section 111 may be located on both axial sides of the second outlet ring segment 114. In the assembled state, the connecting end portion of the outlet pipe 3 and the outlet end cover portion 11 may be sleeved on the outlet connecting pipe 115 and abutted against the second outlet ring segment 114, and then the outlet pipe 3 is fixed on the outlet end cover portion 11 by welding or the like, so that the welding operation by adopting the scheme is relatively easy, the welding quality is relatively easy to control, and the connecting reliability of the outlet pipe 3 and the outlet end cover portion 11 can be improved.
The cylinder 1 may further include an inlet end cover portion 13, the inlet end cover portion 13 may have a similar structure to 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 outward, 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 located at two axial sides of the first inlet ring section 132, respectively; the small diameter end of the conical inlet section 131 may be provided with a second inlet ring segment 134 extending radially inward, and the inner edge of the second inlet ring segment 134 may be provided with an inlet connection pipe 135, and the inlet connection pipe 135 and the conical inlet section 131 may be located at both axial sides of the second annular inlet section 134, respectively. In an assembly state, the cylindrical part 12 can be further inserted into the inlet end cover part 13 and abuts against the first inlet ring section 132, the inlet flange 133 and the outer peripheral wall of the cylindrical part 12 can be in lap welding connection to fixedly connect the cylindrical part 12 and the inlet end cover part 13, one end of the spring 5 can abut against the first inlet ring section 132, and when the unidirectional drying filter is affected by vibration and the spring 5 is pre-deflected, the cylindrical part 12 can reduce the deflection of the spring 5 towards one end of the inlet pipe 2; the connecting end of the inlet pipe 2 and the inlet end cover portion 13 may be sleeved on the interface joint tube 135 and abutted against the second inlet ring segment 134, and then the inlet pipe 2 may be fixed to the inlet end cover portion 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 with reference to the cross-sectional view shown in fig. 1, the filter element and the cylinder body have a gap in the radial direction, 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 process, the refrigerant preferentially flows in the path with the minimum flow resistance (shown by the arrow in the figure), the refrigerant under the path does not pass through the filter element basically, but directly passes through the glass fiber filter screen for filtration, when the stage is finished, the glass fiber filter screen is completely blocked basically, the resistance when the refrigerant flows to the glass fiber filter screen through the filter element is much larger, even the refrigerant cannot flow, and the problem that most areas of the filter element are not used yet and the one-way drying filter fails is caused.
In contrast, in the embodiment of the present invention, the end of the filter element 4 close to the outlet pipe 3 may be provided with the coaxial open groove 44, and the radial dimension of the open groove 44 may gradually increase along the direction close to the outlet pipe 3, and then, by matching with the filling of the circumferential filter positioning portion 612 for the gap between the outer circumferential wall of the filter element 4 and the inner circumferential wall of the cylinder 1 and the design of the reduced diameter end 41, the lengths of different paths (the solid line arrow, the dotted line arrow and the two-dot line arrow in fig. 4) passing through the filter element 4 may be substantially the same, so that there is no significant difference in flow resistance of each path, that is, the refrigerant may pass through all the filter elements 4 more uniformly, and the filtering function of the filter element 4 may be utilized more fully, so as to prolong the service life of the unidirectional dry filter. In specific practice, the difference between the lengths of the paths is preferably controlled within 5%.
Moreover, the tapered open grooves 44 are provided to disperse the outlet positions of the respective flow paths of the refrigerant, thereby facilitating uniform distribution of the fluid in the cylinder 1.
Compared with the prior 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. Here, referring to fig. 1 and fig. 2, the solution in the background art has 5 components in addition to the filter element and the spring, but only two components are needed in the embodiment of the present invention, which can greatly simplify the installation process, reduce the flow resistance, and facilitate to reduce the manufacturing cost of the one-way filter-drier.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a one-way filter-drier according to a second embodiment of the present invention;
the second one-way drying filter provided by the invention comprises a cylinder body 1, wherein an inlet pipe 2 and an outlet pipe 3 are respectively arranged at the two axial ends of the cylinder body 1 and are used for being connected with a pipeline in a refrigerating system; the cartridge 4 is further disposed in the barrel 1, the cartridge 4 includes a body portion 41 and a recessed portion 43, the recessed portion 43 of the cartridge 4 is substantially recessed along the body portion 41 toward the inlet pipe, in this embodiment, the recessed portion 43 is substantially cylindrical, the recessed portion 43 includes a recessed abutting portion 431 and a recessed limiting portion 432, and the recessed abutting portion 431 and the recessed limiting portion 432 are substantially step-like in cross-sectional view.
In addition, the one-way drying filter provided by the embodiment further includes a spring 5, 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 one-way drying filter provided by the invention, two ends of the spring 5 are respectively abutted against the inner wall of the cylinder body 1 and the filter element 4, one end of the spring 5 abutted against the filter element 4 is positioned at the recessed part 43, the recessed limiting part 432 can play a guiding role in assembling the spring 5, the end part of the spring 5 can be abutted against the recessed abutting part 432 under the action of the compression force of the spring 5, and the filter element 4 has a good stabilizing effect. Therefore, in the using process, when the unidirectional dry filter is vibrated so that the filter element 4 is to be radially offset in the cylinder 1, the concave limiting part 432 can be in contact with the outer surface of the spring 5, and the filter element 4 is subjected to the force of the spring 5 along the radial direction of the filter element 4 (opposite to the direction in which the filter element 4 is to be offset) so as to limit the radial offset of the filter element 4 in the cylinder 1, so that the stability of the filter element 4 in the cylinder 1 is good; in addition, the connection reliability between the spring 5 and the filter element 4 is high, friction is not easily generated due to system vibration, the filter element 4 is not easily damaged, and the service life is longer.
The cylinder 1 may further include an inlet end cover portion 13, the inlet end cover portion 13 may have a similar structure to 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 outward, 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 located at two axial sides of the first inlet ring section 132, respectively; the small diameter end of the conical inlet section 131 may be provided with a second inlet ring segment 134 extending radially inward, and the inner edge of the second inlet ring segment 134 may be provided with an inlet connection pipe 135, and the inlet connection pipe 135 and the conical inlet section 131 may be located at both axial sides of the second annular inlet section 134, respectively. In an assembly state, the cylindrical part 12 can be fixedly connected with the inlet end cover part 13 in a welding mode and abuts against the first inlet ring section 132, the inlet flange 133 can be in lap welding with the outer peripheral wall of the cylindrical part 12 to fixedly connect the cylindrical part 12 and the inlet end cover part 13, one end of the spring 5 can abut against the second inlet ring section 134, and when the unidirectional drying filter is influenced by vibration and the spring 5 is pre-deviated, the conical inlet section 131 can reduce the deviation of the spring 5 towards one end of the inlet pipe 2; the connecting end of the inlet pipe 2 and the inlet end cover portion 13 may be sleeved on the interface joint tube 135 and abutted against the second inlet ring segment 134, and then the inlet pipe 2 may be fixed to the inlet end cover portion 13 by welding or the like.
It should be noted that the contact according to the present invention includes direct contact and indirect contact, for example, the spring 5 contacts the inner wall of the cylinder 1, and is not limited to the case that the spring 5 contacts the cylinder 1 directly, but also includes the case that filter paper or other parts are added to the inner wall of the cylinder 1 and the spring 5, and the contact according to the present invention is also applicable.
In addition, in the present invention, the protrusion 42 is substantially protruded along one side of the body 41, but the filter cartridge 4 is not limited to be composed of only the body 41 and the protrusion 42, for example, please refer to fig. 8 specifically, and fig. 8 is another structure of the unidirectional dry filter of the first embodiment provided in the present invention. The filter element 4 includes, in addition to the body portion 41 and the protrusion portion 42, a ring portion 45 extending from the body portion 41 and having a substantially hollow ring shape, the ring portion 45 includes a ring-shaped 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 is externally fitted over the protrusion portion 42, and when the filter element 4 is to be radially offset, the spring 5 can abut against the protrusion limiting portion 421 to restrict radial offset of the filter element 4, but this structure does not affect the description of a structure in which the protrusion portion 42 protrudes substantially along one side of the body portion 41, that is, one side of the body portion is a side of a height direction center of the filter element 4, and it can be understood that the protrusion portion 42 protrudes along one side of the body portion 41, and the protrusion portion 42 is not limited to a most protruding position of the filter element 4.
Similarly, in the present invention, the recessed portion 43 is substantially recessed along one side of the main body 41, but the filter element 4 is not limited to be composed of only the main body 41 and the recessed portion 43, for example, please refer to fig. 9 specifically, and fig. 9 is another structure of the unidirectional dry filter of the second embodiment provided in the present invention. The filter element includes a substantially cylindrical structure extending along the center of the body portion 41, in addition to the body portion 41 and the recessed portion 43, one end of the spring 5 abutting against the filter element 4 is located in the recessed portion 43, and the spring 5 abuts against the recessed abutting portion 431, so that when the filter element 4 is to be radially displaced, the spring 5 can abut against the recessed abutting portion 432 to restrict the radial displacement of the filter element 4, and this structure does not affect the description of the substantially recessed structure along the body portion 41 of the recessed portion 43, that is, the shape of the recessed portion 43 is not limited to a circular shape, and may be another shape, for example, a ring shape, which can restrict the radial displacement of the filter element 4.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (11)
1. The utility model provides an one-way drier-filter, includes barrel (1), be equipped with filter core (4) and spring (5) in barrel (1), its characterized in that, along the axial direction of barrel (1), filter core (4) with spring (5) offset, filter core (4) with spring (5) have the overlap portion in the projection of the arbitrary plane of the central axis through barrel (1), and along the radial direction of barrel (1), filter core (4) with spring (5) can offset.
2. A unidirectional drier filter according to claim 1, further comprising a filter support means (6), said filter support means (6) being mounted to the end of the cartridge (1) near the outlet pipe (3).
3. The unidirectional dry filter according to claim 2, wherein the filter positioning member (61) is a flexible filter material, an outer peripheral portion of which is axially turned over to form the circumferential filter positioning portion (612) in an assembled state, and a portion which is not axially turned over forms the axial filter positioning portion (611).
4. The one-way filter-drier according to claim 3, wherein said flexible filter material is square in shape, and in the assembled state, at least four corners of said flexible filter material are axially foldable.
5. The unidirectional dry filter of claim 4, wherein the length of the side of the flexible filter material is 1.25-1.35 times the diameter of the filter element (4).
6. A unidirectional drying filter according to any one of claims 1 to 5, characterized in that said filtering support means (6) further comprises a support net (62), one side of said support net (62) is against said axial filtering and positioning portion (611) and the other side is supported on the inner wall of said cylinder (1).
7. The one-way drying filter of claim 1, wherein the cylinder body (1) comprises an outlet end cover part (11) and a cylinder part (12), the outlet end cover part (11) comprises a conical outlet section (111), a large-diameter end of the conical outlet section (111) is provided with a first outlet ring section (112) extending outwards in the radial direction, the outer edge of the first outlet ring section (112) is provided with an outlet flange (113), and the outlet flange (113) and the conical outlet section (111) are respectively positioned at two axial sides of the first outlet ring section (112);
in an assembly state, the cylindrical part (12) is inserted into the outlet end cover part (11) and abuts 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).
8. A drier filter according to any one of claims 1 to 5, 7, wherein the filter insert (4) comprises a body (41) and a projecting portion (42), the projecting portion (42) being of a generally projecting configuration along one side of the body (41), the body (41) comprising a body abutment (411), the projecting portion (42) comprising a projection-limiting portion (421);
the two ends of the spring (5) respectively abut against the body abutting part (411) and the inner wall of the barrel body (1), one end, abutted against the body abutting part (411), of the spring (5) is sleeved outside the protruding part (42), and the protruding limiting part (421) can abut against the spring (5).
9. The unidirectional dry filter of claim 8, wherein the cylinder (1) further comprises an inlet end cover portion (13), the inlet end cover portion (13) comprises a conical inlet section (131), a large diameter end of the conical inlet section (131) is provided with a first inlet ring section (132) extending outwards in the radial direction, an outer edge of the first inlet ring section (132) is provided with an inlet flange (133), and the inlet flange (133) and the conical inlet section (131) are respectively positioned at two axial sides of the first inlet ring section (132);
the cylindrical part (12) is fixedly connected with the inlet end cover part (13) and abuts against the first inlet ring section (132), the inlet flanging (133) is in lap welding connection with the outer peripheral wall of the cylindrical part (12), and one end of the spring (5) abuts against the first inlet ring section (132).
10. A drier filter according to any one of claims 1 to 5, 7, wherein the filter insert (4) comprises a body (41) and a recessed portion (43), the recessed portion (43) being substantially recessed along one side of the body (41), the recessed portion (43) comprising a recessed abutment (431) and a recessed limit (432);
the two ends of the spring (5) are respectively abutted against the sunken abutting part (431) and the inner wall of the barrel body (1), one end of the spring (5) abutted against the sunken abutting part (432) is located in the sunken part (43), and the sunken limiting part (432) can be in contact with the spring (5).
11. The unidirectional drying filter of claim 10, characterized in that the cylinder (1) further comprises an inlet end cover portion (13), the inlet end cover portion (13) comprises a conical inlet section (131), and the small diameter end of the conical inlet section (131) is provided with a second inlet ring segment (134) extending radially inwards; one end of the spring (5) is abutted 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 |
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| Publication Number | Publication Date |
|---|---|
| CN113324352A true CN113324352A (en) | 2021-08-31 |
| CN113324352B 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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| CN (1) | CN113324352B (en) |
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|---|---|---|---|---|
| US4557834A (en) * | 1983-05-13 | 1985-12-10 | Pall Corporation | Fluid filter with axial and circumferential seal |
| US20070144350A1 (en) * | 2003-05-19 | 2007-06-28 | Wabco Automotive Uk Limited | Air dryer cartridge |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113324352B (en) | 2024-06-07 |
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