Filter assembly and air conditioning system

Abstract

The utility model relates to a filter assembly and an air conditioning system, the filter assembly comprises a filter and a plurality of connecting pipes, the plurality of connecting pipes are respectively connected to the filter, and the filter and the connecting pipes are made of stainless steel; and moreover, the connecting pipe is provided with a bent part, the flatness ratio of the connecting pipe at the bent part is A, and A is less than or equal to 15%. According to the filter assembly, the bending strength can be guaranteed, and the material cost is low.

Description

Technical Field

[0001] The present application relates to the technical field of filters, and in particular to a filter assembly and an air conditioning system. Background Art

[0002] The filter is usually installed in the air conditioning system and used to filter impurities in the air conditioning system. The filter is connected to the air conditioning system through two pipes at both ends. The pipe and the filter are usually made of copper. Since the rigidity of copper is relatively low, the pipe and the filter are easily deformed when subjected to external forces. Especially when the installation space is limited, the pipe needs to be bent. The bending position is more likely to be deformed by external forces and the strength will be reduced. In addition, the price of copper is relatively high, which makes the material cost high. Utility Model Content

[0003] Based on this, it is necessary to provide a filter assembly and an air conditioning system that can ensure bending strength and have low material cost.

[0004] A filter assembly comprises a filter and a plurality of connecting pipes, wherein the plurality of connecting pipes are respectively connected to the filter, and the filter and the connecting pipes are both made of stainless steel; and the connecting pipe has a bending portion, and the flatness of the connecting pipe at the bending portion is A, and A≤15%.

[0005] In one embodiment, the diameter of the pipe at the non-bending portion is D1, the maximum diameter of the filter is D2, and 1≤D2 / D1≤6.

[0006] In one embodiment, the number of connecting pipes is configured to be two, the filter includes a middle section and two connecting parts respectively located at two ends of the middle section, the diameter of the connecting part is smaller than the diameter of the middle section, and each connecting pipe is correspondingly connected to one connecting part.

[0007] In one embodiment, the connecting portion includes a tapered section and an extension section, wherein one end of the tapered section is connected to the middle section, and the other end extends in a direction away from the middle section and gradually shrinks in a direction close to the axis of the filter, and the extension section is connected to one end of the tapered section away from the middle section, and the connecting pipe and the extension section are mutually sleeved and welded.

[0008] In one embodiment, the extension length of the mutually nested position of the extension section and the connecting pipe is defined as L, wherein L≥2 mm.

[0009] In one embodiment, one of the connecting pipe and the extension section has a first stop step, the first stop step has a first limiting surface arranged toward the other of the connecting pipe and the extension section, and the first limiting surface abuts against a port of the other of the connecting pipe and the extension section.

[0010] In one embodiment, a filter screen is installed in the filter, and a side wall of the filter is provided with a limiting portion protruding toward the inside of the filter. There are two limiting portions, and the two limiting portions are spaced apart along the axial direction of the filter, and the filter screen is clamped between the two limiting portions.

[0011] In one embodiment, the filter assembly further includes an adapter sleeve, the material of which is copper; the number of the adapter sleeves is the same as the number of the connecting pipes, and each adapter sleeve is correspondingly mounted and welded to an end of the connecting pipe away from the filter.

[0012] In one embodiment, the connecting pipe includes a second stop step, and along the axial direction of the connecting pipe and in the direction close to the adapter sleeve, the radial distance between the second stop step and the axis of the connecting pipe gradually decreases, the second stop step is inclined, the adapter sleeve is at least partially sleeved on the outer periphery of the connecting pipe, and one end of the adapter sleeve abuts against the outer side wall of the second stop step. Alternatively, the connecting sleeve includes a second stop step, and along the axial direction of the connecting sleeve and in the direction close to the connecting pipe, the radial distance between the second stop step and the axial direction of the connecting sleeve gradually increases, the second stop step is inclined, the adapter sleeve is partially located on the outer periphery of the connecting pipe, and one end of the connecting pipe abuts against the inner side wall of the second stop step.

[0013] An air conditioning system comprises the filter assembly described in any one of the above embodiments.

[0014] Compared with the prior art, the filter assembly provided by the present application uses stainless steel to make the pipe and the filter, which not only makes the filter assembly less likely to deform when subjected to external forces, but also reduces material costs. Furthermore, by setting A≤15%, it is possible to avoid the pipe from reducing its strength due to bending. And, it is understandable that the larger A is, the greater the degree of deformation of the bend, the greater the resistance encountered by the fluid in the pipe when flowing through the bend, and thus the greater the pressure loss of the fluid flowing through the bend. By setting A≤15%, it is also possible to reduce the pressure loss of the fluid flowing through the bend. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of the structure of the filter assembly provided in this application from a first perspective;

[0017] Figure 2 A schematic diagram of the structure of the filter assembly provided by the present application from a second perspective;

[0018] Figure 3 A cross-sectional view of the connection between the filter and the pipe in one embodiment provided in the present application;

[0019] Figure 4 A cross-sectional view of the connection between the adapter sleeve and the pipe in one embodiment provided in the present application;

[0020] Figure 5 A cross-sectional view of the connection between the adapter sleeve and the connecting pipe in another embodiment provided in the present application.

[0021] Figure numerals: 100, filter assembly; 10, filter; 11, middle section; 12, connecting portion; 121, tapered section; 122, extension section; 122a, first stop step; 122b, first limiting surface; 13, limiting portion; 20, connecting pipe; 21, bending portion; 22, second stop step; 221, second limiting surface; 30, filter screen; 40, adapter sleeve. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0027] See also Figure 1 and Figure 2 The present application provides a filter assembly 100, which includes a filter 10 and a plurality of pipes 20, wherein the plurality of pipes 20 are respectively connected to the filter 10, and the filter 10 and the pipes 20 are both made of stainless steel. The pipe 20 has a bending portion 21, and the flatness of the pipe 20 at the bending portion 21 is A, and A≤15%.

[0028] It should be noted that the flatness A of the connecting pipe 20 at the bend 21 refers to the degree to which the cross section of the connecting pipe 20 deviates from a circle. Specifically, the connecting pipe 20 is a circular tube, the diameter of the connecting pipe is D1, the connecting pipe 20 is bent at the bend 21 so that the cross section deviates from a circle and becomes flat, the major axis length of the cross section of the bend 21 is M, the minor axis length of the cross section of the bend 21 is N, and the flatness A of the connecting pipe 20 at the bend 21 = (MN) / D1. In other words, the larger A is, the greater the degree of deformation of the bend 21 is, and the greater the degree of strength reduction at the bend 21 is. Therefore, by making the connecting pipe 20 and the filter 10 out of stainless steel, not only is it not easy for the filter assembly 100 to deform when subjected to external force, but the material cost can also be reduced. Furthermore, by setting A≤15%, it is possible to avoid the connecting pipe 20 from reducing its strength due to bending. Furthermore, it can be understood that the larger the value of A is, the greater the deformation degree of the bend 21 is, the greater the resistance encountered by the fluid in the pipe 20 when flowing through the bend 21 is, and thus the greater the pressure loss of the fluid flowing through the bend 21 is. By setting A≤15%, the pressure loss of the fluid flowing through the bend 21 can also be reduced. Optionally, the value of A can be 15%, 14%, 13%, or 13.5%. The specific value can be selected according to actual needs.

[0029] Each pipe 20 may be provided with one bending portion 21 or a plurality of bending portions 21. The bending direction and angle of the bending portion 21 are set according to the specific installation environment of the filter assembly 100.

[0030] like Figure 3 As shown, the diameter of the connecting pipe 20 at the non-bending portion 21 is D1, the maximum diameter of the filter 10 is D2, and 1≤D2 / D1≤6. It can be understood that if the value of D2 / D1 is too small, the effective flow area of ​​the filter 10 will be too small, thereby affecting the pressure drop of the air-conditioning system; if the value of D2 / D1 is too large, the cost of the filter 10 will increase. Therefore, by setting 1≤D2 / D1≤6, it is possible to avoid affecting the pressure drop of the air-conditioning system, and it is also beneficial to reduce the cost of the filter 10. Optionally, the value of D2 / D1 can be 1, 2, 3, 3.5, 6, etc., and can be set according to actual needs. Among them, the diameter D1 of the connecting pipe 20 is ≥8mm.

[0031] For example, Figure 3 As shown, the number of the connecting pipes 20 is configured to be two, the filter 10 includes a middle section 11 and two connecting parts 12 respectively located at both ends of the middle section 11, the diameter of the connecting part 12 is smaller than the diameter of the middle section 11, and each connecting pipe 20 is correspondingly connected to a connecting part 12.

[0032] Furthermore, the connecting portion 12 includes a tapered section 121 and an extension section 122. One end of the tapered section 121 is connected to the middle section 11, and the other end extends in a direction away from the middle section 11 and gradually shrinks in a direction close to the axis of the filter 10. The extension section 122 is connected to one end of the tapered section 121 away from the middle section 11, and the connecting pipe 20 and the extension section 122 are mutually sleeved and welded.

[0033] The extending section 122 is provided to ensure that the filter 10 and the connecting pipe 20 have a sufficiently large welding area, thereby ensuring that the filter 10 and the connecting pipe 20 are firmly connected.

[0034] Specifically, the extension length of the mutually nested position of the extension section 122 and the pipe 20 is defined as L, where L≥2mm. For example, the value of L can be 2mm, 2.5mm, 3mm, etc., which is set according to actual needs and is not listed here one by one.

[0035] Furthermore, one of the connecting pipe 20 and the extension section 122 has a first stop step 122a, the first stop step 122a has a first limiting surface 122b set toward the other one of the connecting pipe 20 and the extension section 122, and the first limiting surface 122b abuts against the port of the other one of the connecting pipe 20 and the extension section 122.

[0036] The first stop step 122 a is used to prevent the connecting pipe 20 from excessively extending into the extending section 122 , or to prevent the extending section 122 from excessively extending into the connecting pipe 20 , thereby facilitating reliable connection between the connecting pipe 20 and the extending section 122 .

[0037] The following takes the example of the connecting pipe 20 being inserted into the extension section 122 to introduce the specific structure of the connecting pipe 20 being inserted into the extension section 122 for connection.

[0038] For example, Figure 3 As shown, the first stop step 122a is provided on the extension section 122, the pipe 20 is inserted into the extension section 122, and the port of the pipe 20 is stopped at the first limit surface 122b. The first limit surface 122b can be directly provided on the inner wall of the extension section 122, or the first limit surface 122b can be formed at the location where the pipe diameter is reduced by reducing the pipe diameter in a part of the extension section 122.

[0039] Alternatively, in another embodiment, the pipe 20 is provided with a first stop step 122a formed by shrinking, the first limit surface 122b is located on the outer wall of the pipe 20, the pipe 20 is inserted into the extension section 122, and the end of the extension section 122 stops at the first limit surface 122b. In other embodiments, the extension section 122 may be inserted into the pipe 20, and the arrangement of the first stop step 122a is similar to that of the pipe 20 being inserted into the extension section 122, which will not be described in detail here.

[0040] Please continue reading Figure 3 , a filter screen 30 is installed in the filter 10, and a limit portion 13 protruding toward the inside of the filter 10 is provided on the side wall of the filter 10. There are two limit portions 13, and the two limit portions 13 are arranged at intervals along the axial direction of the filter 10, and the filter screen 30 is clamped between the two limit portions 13. The filter screen 30 is used to filter impurities in the fluid flowing from one connecting pipe 20 to another connecting pipe 20. By clamping the filter screen 30 between the two limit portions 13, the filter screen 30 can be firmly installed in the filter 10. Specifically, the filter screen 30 can be first installed in the filter 10, and then two limit portions 13 protruding toward the inside of the filter 10 can be processed on the side wall of the filter by necking.

[0041] See also Figure 1 The filter assembly 100 further includes an adapter sleeve 40, which is made of copper. The number of adapter sleeves 40 is the same as the number of connecting pipes 20, and each adapter sleeve 40 is correspondingly sleeved and welded to an end of a connecting pipe 20 away from the filter 10. The adapter sleeve 40 is used to connect the connecting pipe 20 to other pipes in the air conditioning system.

[0042] Further, one of the connecting pipe 20 and the adapter sleeve 40 has a second stop step 22, and the second stop step 22 has a second limit surface 221 disposed toward the other of the connecting pipe 20 and the adapter sleeve 40, and the second limit surface 221 abuts against the port of the other of the connecting pipe 20 and the adapter sleeve 40. The second stop step 22 is used to prevent the adapter sleeve 40 from excessively extending into the connecting pipe 20, or to prevent the connecting pipe 20 from excessively extending into the adapter sleeve 40, thereby facilitating reliable connection between the connecting pipe 20 and the extension section 122.

[0043] See also Figure 4 and Figure 5 The following takes the example of the adapter sleeve 40 being sleeved on the outside of the connecting pipe 20 to introduce the specific structure of the connection between the adapter sleeve 40 and the connecting pipe 20.

[0044] like Figure 4 As shown, in one embodiment, the connecting pipe 20 includes a second stop step 22, and along the axial direction of the connecting pipe 20 and the direction close to the adapter sleeve 40, the radial distance between the second stop step 22 and the axis of the connecting pipe 20 gradually decreases, the second stop step 22 is inclined, the adapter sleeve 40 is at least partially sleeved on the outer periphery of the connecting pipe 20, and one end of the adapter sleeve 40 abuts against the outer side wall of the second stop step 22. In this embodiment, the outer side wall of the second stop step 22 constitutes a second limiting surface 221.

[0045] like Figure 5 As shown, in another embodiment, the adapter sleeve 40 includes a second stop step 22, and along the axial direction of the adapter sleeve 40 and the direction close to the connecting pipe 20, the radial distance of the second stop step 22 from the axial direction of the adapter sleeve 40 gradually increases, the second stop step 22 is inclined, the adapter sleeve 40 is partially located on the outer periphery of the connecting pipe 20, and one end of the connecting pipe 20 abuts against the inner side wall of the second stop step 22. In this embodiment, the inner side wall of the second stop step 22 constitutes a second limiting surface 221.

[0046] In other embodiments, the connecting pipe 20 may be sleeved on the outer circumference of the adapter sleeve 40 , and the arrangement of the second stop step 22 is similar to that of the adapter sleeve 40 being sleeved on the outer circumference of the connecting pipe 20 , which will not be described in detail.

[0047] The welding method between the filter 10 and the connecting pipe 20 , and between the connecting pipe 20 and the adapter sleeve 40 may be furnace brazing.

[0048] The present application also provides an air conditioning system, which includes the filter assembly 100 described in any one of the above embodiments.

[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A filter assembly, characterized in that: The filter assembly comprises a filter (10) and a plurality of pipes (20), wherein the plurality of pipes (20) are respectively connected to the filter (10), and the filter (10) and the pipes (20) are both made of stainless steel; Furthermore, the connecting pipe (20) has a bending portion (21), and the flatness of the connecting pipe (20) at the bending portion (21) is A, and A is ≤15%.

2. The filter assembly according to claim 1, characterized in that The diameter of the connecting pipe (20) at a position other than the bending portion (21) is D1, the maximum diameter of the filter (10) is D2, and 1≤D2 / D1≤6.

3. The filter assembly according to claim 1, characterized in that The number of the connecting pipes (20) is configured to be two, the filter (10) comprises a middle section (11) and two connecting parts (12) respectively located at two ends of the middle section (11), the diameter of the connecting parts (12) is smaller than the diameter of the middle section (11), and each of the connecting pipes (20) is correspondingly connected to one of the connecting parts (12).

4. The filter assembly according to claim 3, characterized in that The connecting portion (12) comprises a tapered section (121) and an extension section (122); one end of the tapered section (121) is connected to the middle section (11), and the other end extends in a direction away from the middle section (11) and gradually shrinks in a direction close to the axis of the filter (10); the extension section (122) is connected to an end of the tapered section (121) that is away from the middle section (11); the connecting pipe (20) and the extension section (122) are mutually sleeved and welded.

5. The filter assembly according to claim 4, characterized in that The extension length of the mutually nested position of the extension section (122) and the connecting pipe (20) is defined as L, wherein L≥2 mm.

6. The filter assembly according to claim 4, characterized in that One of the connecting pipe (20) and the extending section (122) has a first stop step (122a), the first stop step (122a) has a first limiting surface (122b) arranged toward the other of the connecting pipe (20) and the extending section (122), and the first limiting surface (122b) abuts against a port of the other of the connecting pipe (20) and the extending section (122).

7. The filter assembly according to claim 1, characterized in that The filter (10) is provided with a filter screen (30), and the side wall of the filter (10) is provided with a limiting portion (13) protruding toward the inside of the filter (10), the limiting portions (13) are two in number, and the two limiting portions (13) are arranged at intervals along the axial direction of the filter (10), and the filter screen (30) is clamped between the two limiting portions (13).

8. The filter assembly according to claim 1, characterized in that The filter assembly further comprises an adapter sleeve (40), the material of the adapter sleeve (40) being copper; the number of the adapter sleeves (40) is the same as the number of the connecting pipes (20), and each of the adapter sleeves (40) is correspondingly sleeved and welded to an end of the connecting pipe (20) away from the filter (10).

9. The filter assembly according to claim 8, characterized in that The connecting pipe (20) comprises a second stop step (22), and along the axial direction of the connecting pipe (20) and in the direction close to the adapter sleeve (40), the radial distance between the second stop step (22) and the axis of the connecting pipe (20) gradually decreases, the second stop step (22) is inclined, the adapter sleeve (40) is at least partially sleeved on the outer periphery of the connecting pipe (20), and one end of the adapter sleeve (40) abuts against the outer side wall of the second stop step (22); Alternatively, the adapter sleeve (40) includes a second stop step (22), and along the axial direction of the adapter sleeve (40) and close to the connecting pipe (20), the radial distance of the second stop step (22) from the axial direction of the adapter sleeve (40) gradually increases, and the second stop step (22) is inclined. The adapter sleeve (40) is partially located on the outer periphery of the connecting pipe (20), and one end of the connecting pipe (20) abuts against the inner wall of the second stop step (22).

10. An air conditioning system, characterized in that: The filter assembly comprises the filter assembly according to any one of claims 1 to 9.

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