CN110131930B

CN110131930B - One-way drying filter

Info

Publication number: CN110131930B
Application number: CN201810136471.3A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2018-02-09
Filing date: 2018-02-09
Publication date: 2022-05-20
Anticipated expiration: 2038-02-09
Also published as: CN110131930A

Abstract

The invention discloses a one-way drying filter, which comprises an inlet end cover and a filter element, wherein the inlet end cover is in surface contact with the filter element so as to position one end of the filter element close to the inlet end cover. The one-way drying filter provided by the invention has the advantages that parts such as an inlet buffer sheet, an inlet baffle net and the like are omitted at the inlet, so that the assembly process can be greatly simplified; the problems that the inlet buffer sheet is crushed to cause positioning failure of the filter element and blockage of a filter channel in the long-term use process do not exist, the service life of the one-way drying filter is prolonged, and the vibration resistance and the filtering performance of the filter element can be improved; the inlet end cover and the filter element are positioned in a surface contact mode, and the flow resistance of the middle part and all the circumferential parts of the filter element is approximately the same, so that the utilization efficiency of the filter element is greatly improved, and the flow capacity is greatly increased; a larger cavity in the background technology does not exist between the inlet end cover and the filter element, and under the condition of the same filter element, the manufacturing material can be greatly saved, so that the manufacturing cost is reduced.

Description

One-way drying filter

Technical Field

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

Background

The one-way drying filter is usually installed between a condenser and an expansion valve of the air conditioning system, and the inside of the one-way drying filter adopts a drying and filtering combined design, so that filtered substances and soluble substances can be effectively prevented from entering key parts of the air conditioning system, and the air conditioning system can run under the optimal working state.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a conventional unidirectional dry filter.

As shown in fig. 1, a conventional one-way filter drier includes an inlet end formed by combining an inlet pipe 01 and an inlet end cap 02, a cylindrical body 05, and an outlet end formed by combining an outlet pipe 010 and an outlet end cap 09, wherein both ends of the body 05 are inserted into the inlet end cap 02 and the outlet end cap 09 by a certain depth, and are welded and fixed to the inlet end cap 02 and the outlet end cap 09; a filter element 06 is arranged in the device body 05, an inlet baffle net 03 and an inlet buffer sheet 04 are sequentially arranged between the inlet end cover 02 and the filter element 06 along the inlet and outlet direction, and an outlet buffer sheet 07 and an outlet baffle net 08 are sequentially arranged between the filter element 06 and the outlet end cover 09 along the inlet and outlet direction.

When mounting, firstly, the outlet end and the device body 05 are fixed by welding; then, an outlet baffle net 08, an outlet buffer sheet 07 and a filter element 06 are sequentially placed in the device body 05, the outlet baffle net 08 can limit one end of the filter element 06 close to the outlet end cover 09, and the outlet buffer sheet 07 can be made of soft materials so as to circumferentially position the filter element 06; then, an inlet buffer sheet 04 and an inlet baffle net 03 are sequentially arranged on one end (hereinafter referred to as an inlet end) of the filter element 06 close to the inlet end cover 02, a protrusion facing to the outlet pipe 010 is arranged in the middle of the inlet baffle net 03, and the filter element 06 is provided with a groove, wherein the protrusion can be matched with the groove to position the axial position of the filter element 06; finally, the inlet end part is pressed and assembled, the inlet buffer sheet 04 can also be made of soft materials, the inlet buffer sheet 04 can buffer and protect the filter element 06 in the pressing and assembling process, and the inlet end part and the device body 05 can be fixed through welding after the pressing and assembling process is completed.

The one-way drying filter with the structure has the following defects in the use process:

1) due to the arrangement of the inlet blocking net 03 and the inlet buffer sheet 04, the middle circulation resistance of the inlet end of the filter element 06 is large, as shown in fig. 1, when a cold medium flows to the middle of the inlet blocking net 03, the cold medium is easy to turn back and tends to pass along the direction with small resistance, such as the periphery of the inlet blocking net 03, and the utilization rate of the filter element 06 is low;

2) a larger cavity is formed between the inlet baffle net 03 and the inlet end cover 02, and in the cavity, because the middle part of the inlet baffle net 03 blocks the refrigerant medium, the cavity is folded back, the flow direction of the refrigerant medium in the cavity is disordered, and a turbulent flow area is generated, so that the integral circulation resistance of the one-way drying filter is larger, the circulation volume is smaller, and the filtering efficiency is lower;

3) when the unidirectional drying filter is used for a long time, due to the vibration of an air conditioning system, the inlet buffer sheet 04 between the inlet baffle net 03 and the filter element 06 is easily crushed, so that the positioning between the inlet baffle net 03 and the filter element 06 is invalid, and the service life of the unidirectional drying filter is influenced;

4) the inlet buffer sheet 04 is made of a soft material, and is easy to displace and even fall off in the press fitting process, and the assembly process is complex.

Therefore, the technical problem to be solved by those skilled in the art is still how to provide a unidirectional dry filter with high filter element utilization rate, large flow capacity, simple assembly and long service life.

Disclosure of Invention

The invention aims to provide a one-way drying filter, which has the advantages of higher filter element utilization rate, higher flow capacity, longer service life and greatly simplified assembly process due to less parts.

In order to solve the technical problem, the invention provides a one-way drying filter, which comprises an inlet end cover and a filter element, wherein the inlet end cover is in surface contact with the filter element so as to position one end of the filter element close to the inlet end cover.

Compared with the background technology, the one-way drying filter provided by the invention has the beneficial effects that the inlet part of the one-way drying filter is saved with an inlet buffer sheet, an inlet blocking net and other parts, and the following aspects are achieved:

1) the number of parts is reduced, and particularly, an inlet buffer sheet made of soft materials is omitted, so that the assembly process of the one-way drying filter can be greatly simplified;

2) because the inlet buffer sheet is omitted, the problems that the inlet buffer sheet is crushed and the positioning of the filter element is invalid in the long-term use process do not exist, the service life of the unidirectional dry filter is prolonged, the vibration resistance is greatly improved, and meanwhile, the blockage of the crushed inlet buffer sheet to a filter channel in the filter element can be avoided, namely, the filtering performance of the filter element in the long-term use process can be ensured;

3) the inlet end cover and the filter element are positioned in a surface contact mode, and the flow resistance of the middle part and all the circumferential parts of the filter element is approximately the same, so that the utilization efficiency of the filter element is greatly improved, and the flow capacity can be greatly increased;

4) the large cavity in the background technology does not exist between the inlet end cover and the filter element, the utilization efficiency of the inner space of the one-way drying filter is high, and under the condition of the same filter element, the manufacturing material of the one-way drying filter can be greatly saved, so that the manufacturing cost is reduced.

The inlet end cover orientation the one end of filter core has along the business turn over direction first locating surface that the slope set up gradually outwards, the filter core orientation the one end of inlet end cover has assorted second locating surface, first locating surface can with the second locating surface contacts, with the location the filter core.

The first positioning surface and the second positioning surface are conical surfaces matched with each other.

The inlet end cover is provided with a bulge facing the filter element, the filter element is provided with a groove, and the outer wall surface of the bulge can be in contact with the inner wall surface of the groove so as to position the filter element.

The outer wall surface of the protruding portion and the inner wall surface of the groove are smooth curved surfaces.

The outlet end cover and the two adjacent ends of the inlet end cover can be overlapped, sealed and fixed by welding; the inlet end cover and the outlet end cover can enclose to form a cavity for installing the filter element.

Still including export buffering piece, export fender net, export buffering piece export fender net is located along the business turn over direction in proper order the filter core with between the export end cover.

Drawings

FIG. 1 is a schematic diagram of a typical embodiment of a single pass filter dryer;

FIG. 2 is a schematic structural diagram of one embodiment of a one-way filter-drier according to the present invention;

fig. 3 is a partially enlarged view of a portion a in fig. 2.

The reference numerals in fig. 1 are explained as follows:

the filter comprises a 01 inlet pipe, a 02 inlet end cover, a 03 inlet baffle net, a 04 inlet buffer sheet, a 05 device body, a 06 filter element, a 07 outlet buffer sheet, a 08 outlet baffle net, a 09 outlet end cover and a 010 outlet pipe.

The reference numerals in fig. 2-3 are illustrated as follows:

1 inlet end cover, 11 first locating surface, 2 filter element, 21 second locating surface, 3 outlet end cover, 4 outlet buffer sheet, 5 outlet baffle net, 6 inlet pipe and 7 outlet pipe.

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 of describing two or more structures or components having the same or similar structure, and do not denote any particular limitation on the order.

Referring to fig. 2-3, fig. 2 is a schematic structural view of an embodiment of a unidirectional dry filter provided in the present invention, and fig. 3 is a partially enlarged view of a portion a in fig. 2.

As shown in fig. 2 and 3, the present invention provides a one-way drying filter, which comprises an inlet end cover 1, a filter element 2 and an inlet pipe 6, wherein the inlet pipe 6 and the inlet end cover 1 can be combined to form an inlet end portion, and the inlet end cover 1 and the filter element 2 are in surface contact with each other to position one end of the filter element 2 close to the inlet end cover 1.

For convenience of description, one end of the filter element 2 close to the inlet end cover 1 can be referred to as an inlet end, and one end of the filter element 2 far from the inlet end cover 1 can be referred to as an outlet end, as shown in fig. 2, the inlet end of the filter element 2 refers to the left end of the filter element 2, and the outlet end of the filter element 2 refers to the right end of the filter element 2; in this context, the direction of the inlet and outlet means the direction of flow of the refrigerant medium in the one-way filter-drier, which is reflected in fig. 2, i.e. from left to right.

It should be noted that the above-mentioned positioning of the inlet end of the filter element 2 refers to both the axial positioning and the circumferential positioning, that is, the inlet end of the filter element 2 can be stably placed inside the unidirectional dry filter by the surface contact between the inlet end cover 1 and the filter element 2.

The one-way drying filter provided by the invention omits parts such as an inlet baffle net, an inlet buffer sheet and the like, so that the number of parts is greatly reduced, particularly, the inlet buffer sheet made of soft materials is omitted, the problems of part displacement and falling-off do not exist in the assembling process, and the assembling process of the one-way drying filter can be greatly simplified.

Meanwhile, as the inlet buffer sheet is omitted, the problem that the inlet buffer sheet is crushed to cause positioning failure of the filter element 2 in the long-term use process does not exist, in other words, the filter element 2 of the unidirectional drying filter provided by the invention is reliably positioned, and the service life is prolonged; and because the filter element 2 is reliably positioned, the vibration resistance of the filter element 2 can be greatly improved.

It should be known that, the filter element 2 used in the unidirectional dry filter is made by bonding a plurality of spherical small-particle molecular sieves into a whole through glue, and filtering channels are distributed among the molecular sieves to realize the circulation of refrigerant media, in the background art, an inlet buffer sheet made of soft materials is easily crushed, and can block the channels among the molecular sieves, which leads to the reduction of the filtering performance of the filter element 2.

For the one-way drying filter provided by the invention, the problem can be perfectly avoided due to the omission of the inlet buffer sheet, namely, the embodiment of the invention can also ensure the filtering performance of the filter element 2 in the long-term use process.

Referring to fig. 2, the direction of the arrow in fig. 2 indicates the flow direction of the refrigerant medium, in the embodiment of the present invention, since the inlet end cap 1 and the filter element 2 are positioned by surface contact, the middle part of the filter element 2 is not blocked by other parts, so that the passing resistance of the middle part and each part in the circumferential direction of the filter element 2 is substantially the same. Therefore, when in use, the cold medium can not selectively pass through the local part of the filter element 2, so that the whole filter element 2 can be used for filtering, the utilization efficiency of the filter element 2 is greatly improved, and the flow rate can also be greatly increased; meanwhile, because the flow directions of the refrigerant media are consistent, the generation of a turbulent flow area can be avoided to a greater extent, so that the flow rate is further improved.

In addition, a larger cavity in the background technology does not exist between the inlet end cover 1 and the filter element 2, that is, after the refrigerant medium flows in from the inlet pipe 6, the refrigerant medium can basically and directly enter the filter element 2, the utilization efficiency of the inner space of the one-way drying filter is higher, and under the condition of the same filter element 2, the manufacturing material of the one-way drying filter can be greatly saved, so that the manufacturing cost is reduced.

Specifically, referring to fig. 3 in combination with fig. 2, the end of the inlet end cap 1 facing the filter element 2 may have a first positioning surface 11 inclined gradually outward along the inlet and outlet direction, the end of the filter element 2 facing the inlet end cap 1 may have a second positioning surface 21 matching with the first positioning surface 11, and the first positioning surface 11 may contact with the second positioning surface 21 to accurately position the filter element 2. The term "outwardly inclined" means inclined radially outwardly, that is, the end of the inlet end cap 1 facing the filter element 2 may have a flared section with a gradually increasing cross-sectional dimension in the inlet and outlet direction, so as to effectively position the filter element 2.

The first positioning surface 11 may be an annular surface, that is, may be disposed around the circumference of the inlet end cover 1, and correspondingly, the second positioning surface 21 may also be an annular surface, and of course, both may also be only a part of the annular surface. More specifically, the first positioning surface 11 and the second positioning surface 21 may be conical surfaces that match each other, such as conical surfaces, pyramidal surfaces, or arc-shaped conical surfaces, and whatever the structure, the filter element 2 may be reliably positioned by the two positioning surfaces.

In another embodiment, the inlet end cap 1 may have a protrusion facing the filter element 2, and the filter element 2 may have a groove, and an outer wall surface of the protrusion may be matched with an inner wall surface of the groove, so that the filter element 2 can be effectively positioned when the outer wall surface of the protrusion contacts the inner wall surface of the groove.

The number of the convex parts can be multiple, and the convex parts can be distributed at intervals along the circumferential direction, correspondingly, the number of the grooves can also be multiple, and the grooves are arranged in one-to-one correspondence with the convex parts; the outer wall surface of the lug boss and the inner wall surface of the groove are preferably smooth curved surfaces so as to avoid the situations of serious abrasion of the lug boss and the groove and breakage of the filter element 2 caused by continuous vibration of the system in the long-term use process; the protrusion and the groove can be respectively disposed on the first positioning surface 11 and the second positioning surface 21 to cooperate with the two positioning surfaces to position the filter element 2.

The above description is mainly directed to the positioning structure of the inlet end of the filter element 2, and the positioning structure of the outlet end of the filter element 2 can be set with reference to the background art.

The one-way drying filter provided by the invention also comprises an outlet buffer sheet 4 and an outlet baffle net 5, wherein the outlet buffer sheet 4 and the outlet baffle net 5 can be sequentially arranged between the filter element 2 and the outlet end cover 3 along the inlet and outlet directions. Export fender net 5 can carry on spacingly to the axial of filter core 2 exit end to cooperate first locating surface 11, with the axial mounted position of injecing filter core 2, export buffer chip 4 can adopt soft material preparation, and wraps up the location to the circumference of filter core 2.

Still referring to fig. 2, the one-way filter-drier according to the embodiment of the present invention may omit the structure of the cooler body, and the two adjacent ends of the outlet end cap 3 and the inlet end cap 1 are directly connected to form a cavity for installing the filter element 2. Compared with the background art, the embodiment of the invention reduces one welding line, reduces the leakage risk of the refrigerant medium, and can greatly improve the sealing performance of the one-way drying filter.

In addition, the two adjacent ends of the outlet end cover 3 and the inlet end cover 1 of the unidirectional dry filter provided by the embodiment of the invention can be welded in a lap joint mode, and by adopting the structure, on one hand, the reliability of sealing and connection between the inlet end cover 1 and the outlet end cover 3 can be ensured, on the other hand, the problem of waste of a sleeved part of materials can be avoided, the materials can be saved, and the production cost can be reduced.

For the one-way dry filter according to the above embodiments, the following steps can be referred to for assembling the one-way dry filter:

sequentially placing the outlet baffle net 5, the outlet buffer sheet 4 and the filter element 2 into the inner cavity of the outlet end cover 3;

the inlet end cover 1 is buckled, and the inlet end cover 1 and the outlet end cover 3 are fixed in a lap welding mode.

Therefore, the one-way drying filter provided by the invention can reduce the extremely complex assembly process in the background technology into two steps, so that the assembly process is greatly simplified, and the assembly efficiency is greatly improved.

It should be emphasized that the one-way drying filter provided by the present invention is not only suitable for air conditioning systems in various applications such as vehicles, household, and business, but also suitable for other systems.

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

1. A one-way drying filter comprises an inlet end cover (1) and a filter element (2), and is characterized in that the inlet end cover (1) is in surface contact with the filter element (2) to position one end of the filter element (2) close to the inlet end cover (1), the filter element (2) is bonded into a whole by a plurality of molecular sieves, and fluid flowing from the inlet end cover (1) directly flows into the filter element (2);

inlet end cover (1) orientation the one end of filter core (2) has along business turn over direction gradually first locating surface (11) that the slope set up outwards, filter core (2) orientation the one end of inlet end cover (1) has assorted second locating surface (21), first locating surface (11) can with second locating surface (21) contact, with the location filter core (2).

2. The unidirectional drier filter of claim 1, wherein said first locating surface (11) and said second locating surface (21) are matching conical surfaces.

3. A one-way filter-drier according to claim 1, wherein the inlet end cap (1) has a projection facing the filter element (2), and the filter element (2) is provided with a groove, the outer wall surface of the projection being able to contact the inner wall surface of the groove to position the filter element (2).

4. The one-way filter-drier according to claim 3, wherein the outer wall surface of the projection and the inner wall surface of the groove are both smooth curved surfaces.

5. The one-way drying filter according to any one of claims 1-4, further comprising an outlet end cover (3), wherein two adjacent ends of the outlet end cover (3) and the inlet end cover (1) can be overlapped and sealed and fixed by welding;

the inlet end cover (1) and the outlet end cover (3) can enclose to form a cavity for installing the filter element (2).

6. The one-way drying filter of claim 5, further comprising an outlet buffer sheet (4) and an outlet baffle net (5), wherein the outlet buffer sheet (4) and the outlet baffle net (5) are sequentially arranged between the filter element (2) and the outlet end cover (3) along the inlet and outlet direction.