CN115127263B

CN115127263B - Unidirectional drying filter

Info

Publication number: CN115127263B
Application number: CN202110321083.4A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2024-06-11
Anticipated expiration: 2041-03-25
Also published as: CN115127263A

Abstract

The invention relates to the technical field of dry filters, and discloses a one-way dry filter, which comprises: a housing including a mounting cavity; the filter element is arranged in the mounting cavity; the limiting piece is arranged in the mounting cavity and comprises a communication hole, a refrigerant can enter the filter element through the communication hole, the limiting piece abuts against the filter element, and the limiting piece comprises a limiting flanging which abuts against the shell; the spring, the locating part still includes spacing ring piece, and the one end of spring offsets with spacing ring piece, and the other end offsets with the inner wall of casing. According to the unidirectional drying filter disclosed by the invention, the additionally arranged limiting piece can enable the spring to abut against the limiting ring piece, so that the spring is limited in the limiting piece, one end of the spring abuts against the filter element through the limiting piece, and the limiting flange of the limiting piece abuts against the shell, so that the position of the limiting piece is relatively fixed, the probability of hard contact and falling-off of the spring and the filter element is reduced, and the other end of the spring abuts against the shell, so that the position of the spring is relatively fixed.

Description

Unidirectional drying filter

Technical Field

The invention relates to the technical field of dry filters, in particular to a one-way dry filter.

Background

The unidirectional dry filter is generally arranged between the condenser and the expansion valve, and the interior adopts a combined design of drying and filtering, so that impurities and soluble substances can be effectively prevented from entering key parts of the refrigerating system, and redundant acidic substances of water are absorbed, thereby avoiding dirty blockage and ice blockage of the system and reducing maintenance.

As shown in fig. 1, for the unidirectional dry filter with the spring 100 and the filter element 200, one end of the filter element 200, which is abutted against the spring 100, is an inclined plane, and a gasket 300 is arranged between the filter element 200 and the spring 100, when the unidirectional dry filter vibrates, the spring 100 shifts relative to the filter element 200, so that the central axis of the spring 100 is difficult to coincide with the central axis of the filter element 200, the compression force applied to the filter element 200 at the same horizontal position is different, and when the compression force of the sharp corner part at the end part of the spring 100 is concentrated, the gasket 300 at the position is easy to break, so that the filter element 200 is in hard contact with the spring 100 and falls off, and finally, the fixation failure is caused.

Disclosure of Invention

Based on the above, the invention aims to provide a unidirectional dry filter, which adopts the following technical scheme:

A unidirectional dry filter comprising: a housing including a mounting cavity; the filter element is arranged in the mounting cavity; the limiting piece is arranged in the mounting cavity, the limiting piece comprises a communication hole, a refrigerant can enter the filter element through the communication hole, the limiting piece abuts against the filter element, the limiting piece comprises a limiting flanging, and the limiting flanging abuts against the shell; the spring, the locating part still includes spacing ring piece, the one end of spring with spacing ring piece offsets, the other end of spring with the inner wall of casing offsets.

According to the unidirectional drying filter disclosed by the invention, the additionally arranged limiting piece can enable the spring to abut against the limiting ring piece, so that the spring is limited in the limiting piece, one end of the spring abuts against the filter element through the limiting piece, and the limiting flange of the limiting piece abuts against the shell, so that the position of the limiting piece is relatively fixed, the probability of hard contact and falling-off of the spring and the filter element is reduced, and the other end of the spring abuts against the shell, so that the position of the spring is relatively fixed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.

FIG. 1 is a cross-sectional view of a conventional one-way dry filter;

FIG. 2 is a split view of a portion of a unidirectional desiccant filter according to one embodiment of the present invention;

FIG. 3 is a cross-sectional view of a one-way filter drier provided in accordance with an embodiment of the present invention;

Fig. 4 is a split view of a portion of a unidirectional desiccant filter according to a second embodiment of the present invention.

In the figure:

100. a spring; 200. a filter element; 300. a gasket; 400. a housing; 500. an end cap;

10. A mounting cavity; 11. a housing; 12. an end cap;

2. A filter element; 201. an annulus; 202. a circular plane; 21. a curved surface bulge;

3. a limiting piece; 31. a limiting ring piece; 32. limit flanging; 33. a curved surface limiting piece; 330. a communication hole; 3301. a first communication hole; 3302. a second communication hole; 34. a connecting sheet;

4. A first filter sheet;

5. A spring;

61. A second filter sheet; 62. and (5) blocking the net.

Detailed Description

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1

This embodiment provides a unidirectional dry filter, as shown in fig. 2 and 3, this unidirectional dry filter includes casing 11, two end covers 12, filter core 2, locating part 3 and spring 5, two end covers 12 weld respectively at the both ends of casing 11 and form installation cavity 10, filter core 2 sets up in installation cavity 10, locating part 3 sets up in installation cavity 10 and locating part 3 includes intercommunicating pore 330, the refrigerant can get into in the filter core 2 through intercommunicating pore 330, locating part 3 offsets with filter core 2, locating part 3 includes spacing turn-ups 32, spacing turn-ups 32 offsets with casing 11, locating part 3 still includes spacing ring piece 31, the one end and the spacing ring piece 31 of spring 5 offset, the other end and the inner wall of casing 11 of spring 5 offset.

In the unidirectional drying filter provided by the embodiment, the additionally arranged limiting piece 3 can enable the spring 5 to abut against the limiting ring piece 31, so that the spring 5 is limited in the limiting piece 3, one end of the spring 5 abuts against the filter element 2 through the limiting ring piece 31, and the limiting flange 32 of the limiting piece 3 abuts against the shell 11, so that the position of the limiting piece 3 is relatively fixed, the probability that the spring 5 and the filter element 2 are in hard contact and fall off is reduced, and the other end of the spring 5 abuts against the shell 11, so that the position of the spring 5 is relatively fixed.

The spring 5 of this embodiment also abuts against the inner wall of the limit flange, so as to reduce the displacement of the spring 5 along the radial direction of the filter element 2.

Because the conventional gasket 300 in fig. 1 is generally a nonwoven fabric gasket with a hole in the center, for a high-pressure system, when the unidirectional dry filter is started under a high-pressure condition, a refrigerant can enter the unidirectional dry filter to generate a larger impact force on the center of the filter element 200, and the long-time impact can weaken the binding force between molecular sieve particles in the filter element 200, so that the filtering effect of the unidirectional dry filter is poor. The unidirectional drying filter of this embodiment further includes a first filter sheet 4, where the first filter sheet 4 is sandwiched between the filter element 2 and the limiting member 3, and at least a portion of the first filter sheet 4 is disposed opposite to the communicating hole 330, and the first filter sheet is a rectangular filter sheet.

The first filter 4 in this embodiment replaces the existing gasket 300, because the center of the first filter 4 is not provided with an opening, the refrigerant can not directly wash the surface of the filter core 2, when the pressure of the refrigerant is higher, the added first filter 4 can reduce the washing of the refrigerant to the filter core 2, improving the filtering effect of the unidirectional dry filter, in addition, the first filter 4 can also filter the refrigerant, and further improving the filtering effect of the unidirectional dry filter.

The filter element 2 of this embodiment is provided with the cooperation plane that corresponds with spacing ring piece 31, and the cooperation plane can laminate through first filter piece 4 with spacing ring piece 31 to make be the face contact between filter element 2 and the spacing ring piece 31.

As shown in fig. 2, the limit flange 32 is disposed along the circumference of the limit ring piece 31, specifically, the limit flange 32 of this embodiment is formed by four arc flanges, the four arc flanges are uniformly distributed at intervals along the circumference of the limit ring piece 31, each arc flange is attached to the inner wall of the housing 11 so as to limit the limiting piece 3 to shake relative to the housing 11, if the limiting piece 3 is not attached to the inner wall of the housing 11, when the housing 11 shakes, the limiting piece 3 shifts relative to the housing 11 and the filter element 2, the spring 5 shifts relative to the filter element 2 along with the limiting piece 3, and finally the pretightening force applied to the filter element 2 at different positions of the same horizontal plane is different, so that the performance of the filter element 2 is affected. In other embodiments, the limiting flange 32 may be a circular flange, which is distributed along the circumference of the limiting ring piece 31, and abuts against the inner wall of the housing 11.

As shown in fig. 2, the mating plane of the present embodiment includes a ring surface 201, the spring 5 generates a pretightening force on the ring surface 201 of the filter element 2 through the limiting ring piece 31 of the limiting piece 3, and the limiting ring piece 31 and the ring surface 201 of the present embodiment are in surface contact through the first filter piece 4, so that the limiting ring piece 31 and the first filter piece 4 are in surface contact. In the background art, because the spring 100 and the gasket 300 are in line contact, the pressure of the spring 100 to the gasket 300 is higher when the spring 100 is compressed, so that the pressure of the spring 100 to the filter element 200 is higher, and the limiting ring piece 31 and the first filter piece 4 in the embodiment are in surface contact, so that the pressure of the spring 5 to the first filter piece 4 is lower, and the function of protecting the filter element 2 is achieved.

As shown in fig. 2, the filter element 2 of this embodiment is provided with curved protrusions 21, the annular surface 201 is distributed along the periphery of the curved protrusions 21, the limiting member 3 further includes curved limiting pieces 33 corresponding to the curved protrusions 21, the curved limiting pieces 33 are corresponding to the limiting ring pieces 31, the communication holes 330 are disposed on the curved limiting pieces 33 and are opposite to the first filter piece 4, the communication holes 330 are used for allowing the refrigerant to flow through, and at least part of the first filter piece 4 is located between the curved protrusions 21 and the curved limiting pieces 33. The curved surface protrusion 21 of the filter element 2 and the curved surface limiting piece 33 of the limiting piece 3 can enable at least part of the first filter disc 4 to be firmly clamped between the curved surface protrusion 21 and the curved surface limiting piece 33, so that the function of further positioning the filter element 2 is achieved.

In the background art, the casing 400 is fixedly connected with the end cover 500 at the end part through a welding process, and the casing 400 and the end cover 500 are welded together through a CO ₂ welding high-pressure system generally in the background art, and the gasket 300 is easily curled or melted due to the fact that the distance between the gasket 300 and the welding position of the casing 400 and the end cover 500 is relatively short, so that the spring 100 and the filter element 200 are in hard contact, and contact friction exists between the spring 100 and the filter element 200, and the filter element 200 is damaged. As shown in fig. 2, the first filter sheet of the present embodiment is sandwiched between the spacing ring sheet 31 and the ring surface 201, the four connecting sheets 34 are all disposed on the spacing ring sheet 31, and each connecting sheet 34 extends outward along the radial direction of the spacing ring sheet 31, the spacing flange 32 is fixedly disposed on the connecting sheet 34, and the spacing ring sheet 31, the spacing flange 32, the curved spacing sheet 33 and the connecting sheet 34 in the present embodiment are integrally formed into the spacing member 3. In other embodiments, the limiting ring piece 31, the limiting flange 32, the curved limiting piece 33 and the connecting piece 34 may be provided separately, specifically according to actual needs.

Because some first filter piece 4 presss from both sides between spacing ring piece 31 and anchor ring 201, still some first filter piece 4 presss from both sides between curved surface protruding 21 and curved surface spacing piece 33, when casing 11 and end cover 12 weld, although the first filter at edge has the phenomenon of melting, but still the first filter piece 4 is pressed from both sides between locating part 3 and filter core 2, the locating part 3 of addding can avoid spring 5 and filter core 2 to be the hard contact, the reliability of the connection of spring 5 and filter core 2 has been increased, the risk that the molecular sieve in the filter core 2 drops has been reduced, the life of filter core 2 has been prolonged.

As shown in fig. 2, the communication holes 330 of the present embodiment include one first communication hole 3301 and twelve second communication holes 3302, one first communication hole 3301 is located at the center of the curved surface limiting piece 33, the diameter of the first communication hole 3301 is larger than that of the second communication hole 3302, twelve second communication holes 3302 are arranged on the curved surface limiting piece 33 at intervals, and twelve second communication holes 3302 are uniformly distributed along the circumferential direction of the curved surface limiting piece 33.

As shown in fig. 3, the unidirectional drying filter of the present embodiment further includes a second filter sheet 61 and a blocking net 62, where the second filter sheet 61 and the blocking net 62 are both disposed at one end of the filter element 2 facing away from the first filter sheet 4, the second filter sheet 61 is sandwiched between the blocking net 62 and the filter element 2, and the second filter sheet 61 can filter the refrigerant again, so as to enhance the filtering effect of the unidirectional drying filter.

Example two

The difference between this embodiment and the first embodiment is that, as shown in fig. 4, the mating plane of this embodiment is a circular plane 202, the limiting member 3 includes a limiting ring piece 31, four limiting flanges 32 and four connecting pieces 34, each limiting flange 32 is connected to the limiting ring piece 31 through one connecting piece 34, the center of the limiting ring piece 31 forms a communication hole 330, the first filter piece 4 is a circular filter piece, and the circular filter piece is sandwiched between the circular plane 202 and the limiting ring piece 31, that is, the circular filter piece of this embodiment replaces the rectangular filter piece in the first embodiment.

Because the spring 5 of the unidirectional drying filter of the embodiment is propped against the circular plane 202 of the filter element 2 through the limiting piece 3, the limiting ring piece 31 and the circular plane 202 are in surface contact, namely the limiting ring piece 31 and the circular filter piece are in surface contact as well, and the pressure of the spring 5 on the first filter piece 4 is reduced, so that the filter element 2 is protected.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims

1. A unidirectional dry filter, comprising:

a housing (11) comprising a mounting cavity (10);

the filter element (2) is arranged in the mounting cavity (10);

The limiting piece (3) is arranged in the mounting cavity (10), the limiting piece (3) comprises a communication hole (330), a refrigerant can enter the filter element (2) through the communication hole (330), the limiting piece (3) is propped against the filter element (2), the limiting piece (3) comprises a limiting flanging (32), and the limiting flanging (32) is propped against the shell (11);

The limiting piece (3) further comprises a limiting ring piece (31), one end of the spring (5) is propped against the limiting ring piece (31), and the other end of the spring (5) is propped against the inner wall of the shell (11);

The unidirectional drying filter further comprises a first filter disc (4), wherein the first filter disc (4) is clamped between the filter element (2) and the limiting piece (3), and at least part of the first filter disc (4) is opposite to the communication hole (330);

The filter element (2) is provided with a matching plane corresponding to the limiting ring piece (31), and the matching plane can be attached to the limiting ring piece (31) through the first filter piece (4);

The filter element (2) is provided with a curved surface bulge (21), the limiting piece (3) further comprises a curved surface limiting piece (33) which is arranged corresponding to the curved surface bulge (21), the curved surface limiting piece (33) is arranged corresponding to the limiting ring piece (31), the communication hole (330) is arranged on the curved surface limiting piece (33), and at least part of the first filter piece (4) is positioned between the curved surface bulge (21) and the curved surface limiting piece (33).

2. A unidirectional dry filter as claimed in claim 1, characterized in that the spring (5) abuts against the limit flange (32).

3. The unidirectional drying filter of claim 1, wherein the communication hole (330) includes a first communication hole (3301) and a plurality of second communication holes (3302), the first communication hole (3301) is located at the center of the curved surface limiting piece (33), and the plurality of second communication holes (3302) are arranged on the curved surface limiting piece (33) at intervals.

4. A unidirectional drying filter as claimed in claim 1, wherein the mating plane is an annulus (201), the first filter sheet (4) being sandwiched between the stop collar sheet (31) and the annulus (201).

5. A unidirectional drying filter as claimed in claim 1, characterized in that the mating plane is a circular plane (202), the first filter sheet (4) being a circular filter sheet, the circular filter sheet being sandwiched between the circular plane (202) and the stop collar sheet (31).

6. A unidirectional drying filter according to claim 1, further comprising a second filter sheet (61) and a blocking net (62), both the second filter sheet (61) and the blocking net (62) being arranged at an end of the filter element (2) facing away from the first filter sheet (4), the second filter sheet (61) being sandwiched between the blocking net (62) and the filter element (2).

7. A unidirectional drier filter as claimed in claim 6, wherein the stop (3) further comprises a connecting piece (34), the connecting piece (34) being arranged on the stop collar piece (31) and the connecting piece (34) extending outwards in a radial direction of the stop collar piece (31), the stop flange (32) being fixedly arranged on the connecting piece (34).

8. A unidirectional drier-filter according to claim 1, wherein the limit flanges (32) are arranged along the circumference of the limit ring piece (31), the limit flanges (32) are circular flanges or are composed of at least two arc flanges, and the at least two arc flanges are distributed at intervals along the circumference of the limit ring piece (31).