Filter screen mounting structure and machine room air conditioner

Abstract

The utility model discloses a filter screen mounting structure and a machine room air conditioner, and relates to the technical field of air conditioning equipment, the filter screen mounting structure comprises a supporting frame arranged on the air inlet side of a heat exchange core body and a filter screen assembly located in the supporting frame, and the filter screen assembly comprises an outer frame and a filter screen arranged on the outer frame; a first frame edge of the outer frame is provided with a positioning pin protruding outwards, a second frame edge, opposite to the first frame edge, of the outer frame is provided with a first positioning hole, and the supporting frame is provided with a limiting piece used for fixing the outer frame to the supporting frame. In the outer frames of two adjacent filter screen assemblies, the first frame edge of one outer frame abuts against the second frame edge of the other outer frame, and the positioning pins are connected with the first positioning holes in an inserted mode. The installation complexity of the filter screen is reduced, the maintenance and installation efficiency is improved, and the stability of the filter screen after installation is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning equipment, and in particular to a filter installation structure. In addition, the present application also relates to a computer room air conditioner including the above-mentioned filter installation structure. Background Art

[0002] The G4 filter is an air filter, which is mainly used in industrial precision air conditioners to filter dust particles during the operation of the air conditioner unit. The existing G4 filter is usually arranged on the air inlet side of the air conditioner unit, and a slot is provided at the lower part of the air inlet side of the air conditioner unit. The bottom edge of the filter is connected to the slot, and the side and top edges of the filter are pressed onto the air conditioner unit by pressing plates. However, during the implementation of the present utility model, it was found that when the filter has a certain length and multiple groups of filters need to be stacked up and down, it is necessary to add a pressing plate structure between two adjacent groups of filters so that the multiple groups of filters are pressed onto the air conditioner unit in an integrated shape. This installation method is more cumbersome during maintenance, and the pressing plate solves the problem of the filter being separated from the air conditioner unit, but cannot guarantee the relative stability between the two adjacent groups of filters, resulting in the problem of the filter shaking during transportation of the air conditioner unit.

[0003] Therefore, in response to the above technical problems, how to provide a filter installation structure with simple installation method and high stability is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this application is to provide a filter installation structure that reduces the complexity of filter installation, improves maintenance and installation efficiency, and improves the stability of the filter after installation.

[0005] To achieve the above-mentioned object, the present application provides a filter screen installation structure, comprising a support frame provided on the air inlet side of a heat exchange core and a filter screen assembly provided in the support frame, the filter screen assembly comprising an outer frame and a filter screen provided on the outer frame, a first frame edge of the outer frame being provided with a positioning pin protruding outward, a second frame edge of the outer frame being provided with a first positioning hole opposite to the first frame edge, and a limiting member for fixing the outer frame to the support frame;

[0006] For the outer frames in any two adjacent groups of the filter assemblies, the first frame edge of one group of the outer frames abuts against the second frame edge of the other group of the outer frames, and the positioning pins are plugged into the corresponding first positioning holes.

[0007] Preferably, the support frame is a square frame, and the inner ring of the support frame at least covers the air inlet side opening of the heat exchange core, the lower frame edge of the support frame abuts against the first frame edge, and a second positioning hole is provided on the lower frame edge to be plugged into the positioning pin.

[0008] Preferably, the outer frame is a square frame, and multiple groups of the outer frames are distributed in the supporting frame in a rectangular array. The outer frames on the outermost side of the rectangular array abut against the inner circle of the supporting frame, and the adjacent outer frames in the same row abut against each other, and the adjacent outer frames in the same column abut against each other.

[0009] Preferably, a plurality of the positioning pins are provided on the first frame sides of any group of the outer frames, the number of the second positioning holes is greater than or equal to the number of the positioning pins, and the lower frame side has some of the second positioning holes within its length corresponding to the positions of the positioning pins;

[0010] In two adjacent groups of outer frames in the same column, the first positioning holes and the positioning pins are consistent in number and have one-to-one corresponding positions.

[0011] Preferably, in any group of the plurality of positioning pins on the outer frame, the distances between adjacent positioning pins are L1, L2, ..., L N , N is the number of the positioning pins minus one;

[0012] When N=2, L1≠L2;

[0013] When N≥3, L1, L2...L N There are at least three different values.

[0014] Preferably, the number of the positioning pins on any group of the outer frames is two, and the two positioning pins are at different distances from the center line of the outer frames.

[0015] Preferably, the limiting member includes a rotary pressing piece, which is rotatably arranged and has at least one rotation position, so that the end of the rotary pressing piece protrudes from the inner ring of the support frame to press the outer frame tightly into the support frame.

[0016] A computer room air conditioner comprises a frame and a heat exchange core arranged on the frame, and also comprises a filter mounting structure arranged on the air inlet side of the heat exchange core, wherein the filter mounting structure is the filter mounting structure described above.

[0017] Preferably, the air inlet side of the heat exchange core is provided with an inclined surface, a support frame is provided at the inclined surface, a lower frame edge of the support frame is provided on the side of the frame body, and an upper frame edge of the support frame is located inside the frame body.

[0018] Preferably, the frame is provided with a maintenance passage corresponding to the middle portion of the support frame, and the maintenance passage is provided on the frame and is arranged close to the filter assembly.

[0019] Compared with the prior art, the technical solution provided by this application has at least the following beneficial effects:

[0020] By plugging and fitting the locating pins and first locating holes on different filter assemblies, the filter assemblies are stably positioned relative to each other. The two plug-in limiting devices allow the filter assemblies to be stably positioned within the support frame, preventing side-to-side shaking and up-and-down bouncing. At the same time, the plug-in limiting devices facilitate the coordination of the filter assemblies and the support frame, preventing misalignment and improper installation. They also facilitate coordination between multiple filter assemblies. The omission of the pressing plate structure makes installation of the filter assemblies more convenient, reducing the complexity of installation and improving maintenance and installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0022] Figure 1 A three-dimensional schematic diagram of the filter installation structure provided in an embodiment of the present application;

[0023] Figure 2 A front view schematic diagram of the filter installation structure provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the structure of the filter assembly provided in an embodiment of the present application from a first perspective;

[0025] Figure 4 A schematic diagram of the structure of the filter assembly provided in an embodiment of the present application from a second perspective;

[0026] Figure 5 for Figure 1 Schematic diagram of the partially enlarged structure.

[0027] In the figure: 1-heat exchange core; 2-support frame; 21-lower frame edge; 211-second positioning hole; 3-frame; 4-filter assembly; 41-outer frame; 411-first frame edge; 412-positioning pin; 413-second frame edge; 414-first positioning hole; 42-filter. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper," "lower," "front," and "back" are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0031] like Figure 1 and Figure 2 As shown, in this embodiment, a filter mounting structure is provided. This structure is typically installed on the air inlet side of the air conditioning unit, that is, on the air inlet side of the heat exchange core 1 in the air conditioning unit, and is used to filter dust particles during the operation of the air conditioning unit. A support frame 2 is provided on the air inlet side of the heat exchange core 1. A removable filter assembly 4 is disposed within the support frame 2. The filter assembly 4 includes an outer frame 41 and a filter 42 disposed within the outer frame 41.

[0032] When the filter assembly 4 is placed in the support frame 2, the inner ring of the support frame 2 has a baffle structure extending inward, and the baffle structure limits and supports the outer frame 41 of the filter assembly 4, so that the filter assembly 4 can be placed in a suitable position in the support frame 2, preventing the filter assembly 4 from being too close to the heat exchange core 1.

[0033] Please refer to Figure 3 and Figure 4 The first frame side 411 of the outer frame 41 is provided with a positioning pin 412 protruding outward, and the other side of the outer frame 41, that is, the second frame side 413 opposite the first frame side 411, is provided with a first positioning hole 414. In other words, an outer frame 41 has at least two frame sides, each with a positioning pin 412 and a first positioning hole 414, and these two frame sides are the first frame side 411 and the second frame side 413.

[0034] When the filter assembly 4 is placed in the support frame 2, since the support frame 2 needs to support the filter assembly 4, the frame edge of the support frame 2 needs to abut against the frame edge of the outer frame 41. At the same time, there is at least one frame edge on the support frame 2 that can abut against the first frame edge 411 of the outer frame 41, and a second positioning hole 211 that is plugged into the positioning pin 412 is provided on the frame edge of the support frame 2. For details, please refer to Figure 5On the other frame edges of the support frame 2, position limiting members can be provided to fix the outer frame 41 to the support frame 2 through the position limiting members, thereby ensuring the stability of the overall installation of the filter assembly 4.

[0035] In some embodiments, the frame edge with the second positioning hole 211 can be the lower frame edge 21 of the support frame 2, so that when the outer frame 41 is placed in the support frame 2, the positioning pin 412 can be easily inserted into the second positioning hole 211 under the action of gravity of the filter assembly 4; if there are multiple groups of filter assemblies 4 in the support frame 2, then the filter assemblies 4 stacked up and down can be connected through the positioning pin 412 and the first positioning hole 414. In other words, taking the upper and lower layers of filter assemblies 4 as an example, after the positioning pin 412 of the lower filter assembly 4 is connected with the second positioning hole 211, the lower filter assembly 4 is relatively stable. At this time, the positioning pin 412 on the upper filter assembly 4 can be correspondingly connected with the first positioning hole 414 on the lower filter assembly 4, so that the upper filter assembly 4 is also stably set. If the number of filter assemblies 4 is greater than two, repeating the above steps can ensure that the multiple layers of filter assemblies 4 are stably set.

[0036] Of course, when the upper filter assembly 4 and the lower filter assembly 4 are correspondingly plugged in through the positioning pin 412 and the first positioning hole 414, in order to ensure the stability of the two, the outer frame 41 in the upper filter assembly 4 is also required to abut against the outer frame 41 of the lower filter assembly 4, specifically, the first frame edge 411 of the upper outer frame 41 is abutted against the second frame edge 413 of the lower outer frame 41.

[0037] It should be noted that the filter assembly 4 can also be a single set, that is, it is sufficient to ensure that the positioning pins 412 on the filter assembly 4 can be plugged into and matched with the second positioning holes 211. Similarly, the outer frame 41 of the filter assembly 4 also needs to abut against the inner ring of the support frame 2 to ensure the stability of the reassembled filter assembly 4.

[0038] In summary of the above embodiments, the present application realizes the stable setting of the filter assembly 4 and the support frame 2 by plugging and matching the positioning pin 412 and the second positioning hole 211, and realizes the stable setting between the filter assemblies 4 by plugging and matching the positioning pin 412 and the first positioning hole 414 on different filter assemblies 4, thereby realizing the stable setting of the filter assembly 4 in the support frame 2 through the two plug-in limiting devices, avoiding the situation of shaking left and right and jumping up and down. At the same time, the plug-in limiting device can make the matching of the filter assembly 4 and the support frame 2 more convenient, prevent the situation of misalignment, inadequate installation, etc., and make the matching between multiple groups of filter assemblies 4 more convenient. Since the pressing plate structure is omitted, the cumbersome problem caused by fixing two adjacent groups of filters by the pressing plate structure is solved, the complexity of installing the filter assembly 4 is reduced, and the maintenance and installation efficiency is improved.

[0039] In related art, the air inlet side of the heat exchange core 1 is typically a regular square structure, so the support frame 2 can also be configured as a square frame. Of course, the shape of the support frame 2 includes but is not limited to a square, and these are not detailed here. If the support frame 2 has other shapes, the shape of the filter assembly 4 can be adaptively adjusted to ensure a stable fit between the support frame 2 and the filter assembly 4.

[0040] Since the filter assembly 4 is arranged on the inner circle of the support frame 2 , the inner circle of the support frame 2 can at least cover the air inlet side opening of the heat exchange core 1 , thereby filtering the air entering the heat exchange core 1 .

[0041] The above description indicates that the second positioning hole 211 can be provided on the lower frame edge 21 of the support frame 2, allowing for quick installation by utilizing the weight of the filter assembly 4. Of course, the second positioning hole 211 can also be provided on the upper frame edge of the support frame 2. When installing the filter assembly 4, it is necessary to first install the upper filter assembly 4, that is, align the first frame edge 411 of the upper filter assembly 4 with the upper frame edge of the support frame 2, and engage the positioning pin 412 with the first positioning hole 414. The lower filter assembly 4 is then installed on the lower side of the upper filter assembly 4 and supported by the lower frame edge 21 of the support frame 2. However, compared to the technical solution of providing the second positioning hole 211 on the lower frame edge of the support frame 2, the technical solution of providing the second positioning hole 211 on the upper frame edge of the support frame 2 can achieve the purpose of stable installation of the filter assembly 4. While this solution is significantly less simple to install than the first solution, it still falls within the scope of protection of this application.

[0042] It should be noted that the insertion of the locating pins 412 into the second locating holes 211 is intended to prevent the filter assembly 4 from rocking side to side. Simultaneously, the insertion of the locating pins 412 into the first locating holes 414 in two adjacent groups of filter assemblies 4 in the upper and lower layers is intended to improve the relative stability between the filter assemblies 4, thereby preventing rocking between the multiple layers of filter assemblies 4. The insertion of the pins and holes also prevents the filter assembly 4 from moving in a direction perpendicular to the plane of the support frame 2, thereby further improving the stability of the filter assembly 4 relative to the support frame 2. Furthermore, the abutment of the support frame 2 against the inner and outer frames 41 of the filter assembly 4 prevents up and down bouncing between the filter assembly 4 and the support frame 2, or between adjacent filter assemblies 4.

[0043] Since the support frame 2 is a square frame, the outer frame 41 is also set as a square frame. Multiple groups of outer frames 41 are distributed in a rectangular array in the support frame 2, so that one group of filter components 4 or multiple groups of filter components 4 fill the support frame 2.

[0044] When there is only one set of filter assemblies 4, the four frame edges of the outer frame 41 respectively abut against the inner ring of the support frame 2, and the positioning pin 412 of the first frame edge 411 is inserted into the second positioning hole 211. When there are multiple sets of filter assemblies 4, the multiple sets of filter assemblies 4 are arranged in a rectangular array, and the outer frames 41 on the outermost side of the rectangular array abut against the inner ring of the support frame 2, thereby ensuring that the multiple sets of filter assemblies 4 are stably arranged in the support frame 2, and the positioning pin 412 of the first frame edge 411 is inserted into the second positioning hole 211. On this basis, in the multiple sets of filter assemblies 4 in the rectangular array, adjacent outer frames 41 in the same row abut against each other, and similarly, adjacent outer frames 41 in the same column abut against each other.

[0045] In order to further improve the stability between the filter assembly 4 and the support frame 2, and between adjacent filter assemblies 4, in some embodiments, a plurality of positioning pins 412 can be provided on the first frame edge 411 of the outer frame 41, and the number of the second positioning holes 211 is greater than or equal to the number of the positioning pins 412. It should be noted that when there is only one filter assembly 4, the number of the second positioning holes 211 is consistent with the number of the positioning pins 412; when there are multiple filter assemblies 4, it is possible to set multiple filter assemblies 4 in the same row. In this case, the number of the second positioning holes 211 needs to be greater than the number of the positioning pins 412 on one group of filter assemblies 4, so that the positioning pins 412 on multiple groups of filter assemblies 4 can be respectively plugged into the second positioning holes 211.

[0046] At the same time, the lower frame edge 21 of the support frame 2 has a portion of the second positioning holes 211 along its length that correspond one-to-one with the positions of the positioning pins 412, thereby allowing the filter assembly 4 to be smoothly installed within the support frame via the positioning pins 412. It should be noted that the aforementioned "portion of the second positioning holes 211" generally corresponds to one filter assembly 4, while multiple groups of "portion of the second positioning holes 211" correspond to multiple groups of filter assemblies 4 in the same row, thereby allowing each group of filter assemblies 4 to be stably plugged into the lower frame edge 21.

[0047] In addition, for adjacent outer frames 41 in the same row, the number of positioning pins 412 of the upper outer frame 41 and the position of the first positioning holes 414 of the lower outer frame 41 can be consistent, so as to achieve stable insertion of the upper and lower filter screen assemblies 4.

[0048] However, regardless of whether the multiple groups of filter assemblies 4 are in the same row or column, the corresponding side edges of the multiple groups of filter assemblies 4 should be kept on the same straight line, so that the filter assemblies 4 in each row or column remain in a square state, so that the outer contours of the multiple groups of filter assemblies 4 distributed in a rectangular array can be equivalent to the inner circle contour of the support frame 2, thereby achieving a stable setting of the filter assemblies 4 relative to the support frame 2.

[0049] For each set of outer frames 41, multiple positioning pins 412 are preferably provided on the outer frame 41. Of course, only one positioning pin 412 may be provided. Detailed description of one positioning pin 412 is omitted here. When multiple positioning pins 412 are provided on the outer frame 41, there are two cases.

[0050] One is that there are two locating pins 412 in the outer frame 41. In order to avoid the filter assembly 4 from being placed incorrectly on the front and back during maintenance, the two locating pins 412 here are at different distances from the center line of the outer frame 41, that is, the two locating pins 412 are asymmetrically arranged about the center line of the outer frame 41; the center line refers to the line connecting the midpoints of the two opposite sides of the outer frame 41, specifically the line connecting the midpoints of the first frame edge 411 and the second frame edge 413 in the outer frame 41; if the filter assembly 4 is placed correctly on the front and back, the two locating pins 412 can be smoothly plugged into the two second locating holes 211, and the frame edge of the outer frame 41 is also in the correct position; but if the filter assembly 4 is placed incorrectly on the front and back, since the locating pins 412 are not symmetrically arranged, although the two locating pins 412 can also be plugged into the two second locating holes 211, it will cause the filter assembly 4 to shift in the support frame 2, causing the distance between the left and right sides of the filter assembly 4 and the side frame edge of the support frame 2 to change, and this method can be used to remind maintenance personnel of the placement error. On this basis, the corresponding first positioning holes 414 are also arranged in the same manner as the positioning pins 412, so that the two adjacent groups of filter screen assemblies 4 in the upper and lower layers can also be correctly placed.

[0051] Another is that the number of the positioning pins 412 on the outer frame 41 is greater than two, then in any group of the plurality of positioning pins 412 on the outer frame 41, the distances between adjacent positioning pins 412 are respectively recorded as L1, L2, ..., L N , where N is the number of positioning pins 412 minus one. For example, when the number of positioning pins 412 is three, N is two, and so on. When N=2, that is, the number of positioning pins 412 is three, L1≠L2 is required. At this time, if the front and back of the filter assembly 4 are correct, the positioning pin 412 can be smoothly inserted into the second positioning hole 211. However, if the front and back of the filter assembly 4 are wrong, due to the different spacing between adjacent positioning pins 412, the positioning pin 412 will be misaligned with the second positioning hole 211, resulting in the positioning pin 412 and the second positioning hole 211 being unable to be plugged in, so as to remind maintenance personnel that the filter assembly 4 is misplaced. When N≥3, that is, the number of positioning pins 412 is greater than or equal to four, then L1, L2...L NThere are at least three different values ​​in the second positioning holes 211. The principle is the same as when there are three positioning pins 412. By varying the spacing between the positioning pins 412, the filter assembly 4 can only be placed on the support frame 2 in one position. If the position is incorrect, the positioning pins 412 on the filter assembly 4 cannot be inserted into the second positioning holes 211. Similarly, the corresponding first positioning holes 414 are also arranged in the same manner as the positioning pins 412, so that the two adjacent filter assemblies 4 in the upper and lower layers can also be correctly placed.

[0052] The provision of the positioning pins 412 and the positioning holes can stably position the filter assembly 4 in the support frame 2 and make the filter assembly 4 more convenient to install. At the same time, it is also necessary to limit the other side edges of the filter assembly 4 so that the other side edges of the filter assembly 4 can also be stably positioned with the support frame 2. In some embodiments, the above-mentioned limiting member includes a rotary pressing plate, which is provided on the side edge other than the lower frame edge 21 of the support frame 2. The rotary pressing plate is rotatably provided and has at least one rotation position so that the end of the rotary pressing plate protrudes from the inner ring of the support frame 2 to press the outer frame 41 into the support frame 2; that is, when the filter assembly 4 is placed in the support frame 2, the rotary pressing plate can be pressed against the outer frame 41 in the filter assembly 4 during the rotation process, thereby stably clamping the filter assembly 4 under the action of the rotary pressing plate and the baffle structure.

[0053] This application also provides a computer room air conditioner, please refer to Figure 1 The computer room air conditioner includes a frame 3 and a heat exchange core 1 arranged on the frame 3, and also includes a filter mounting structure arranged on the air inlet side of the heat exchange core 1. The filter mounting structure is the above-mentioned filter mounting structure, so that the computer room air conditioner also has a stable filter structure, reduces the complexity of installing the filter, and improves the maintenance and installation efficiency.

[0054] As mentioned above, the air inlet side of the heat exchange core 1 is provided with an inclined surface, which can increase the heat exchange area of ​​the heat exchange core 1. A support frame 2 is provided on the inclined surface, so that when the filter assembly 4 is placed in the support frame 2, the inclined surface provides a certain support for the filter assembly 4, and the filter assembly 4 is not easy to fall over. The lower frame edge 21 of the support frame 2 is provided on the side of the frame 3, and the upper frame edge of the support frame 2 is located inside the frame 3. In the related art, the maintenance aisle of the computer room air conditioner is usually provided at the bottom of the filter assembly 4, that is, roughly aligned with the lower frame edge 21 of the support frame 2, but this will result in the filter assembly 4 being blocked during maintenance and unable to be removed.

[0055] The present application, however, arranges the maintenance aisle on the frame 3 at a position corresponding to the middle of the support frame 2, and the maintenance aisle is arranged close to the filter assembly 4, that is, one side of the maintenance aisle is arranged on the frame 3, and the other side extends toward the support frame 2 and is spaced apart from the support frame 2, thereby avoiding the existence of the maintenance aisle affecting the installation of the filter assembly 4, and at the same time avoiding the problem of maintenance personnel having difficulty in removing the filter assembly 4 in the maintenance aisle.

[0056] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0057] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core ideas of this application. It should be noted that for those skilled in the art, without departing from the principles of this application, various improvements and modifications can be made to this application, and such improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A filter installation structure, characterized in that: The invention comprises a support frame (2) provided on the air inlet side of a heat exchange core (1) and a filter assembly (4) provided in the support frame (2), wherein the filter assembly (4) comprises an outer frame (41) and a filter (42) provided on the outer frame (41), a first frame edge (411) of the outer frame (41) is provided with a positioning pin (412) protruding outward, a second frame edge (413) on the outer frame (41) opposite to the first frame edge (411) is provided with a first positioning hole (414), and a position limiting member for fixing the outer frame (41) on the support frame (2) is provided on the support frame (2); The outer frames (41) in any two adjacent groups of the filter screen assemblies (4) are such that the first frame edge (411) of one group of the outer frames (41) abuts against the second frame edge (413) of the other group of the outer frames (41), and the positioning pins (412) are plugged into the corresponding first positioning holes (414).

2. The filter installation structure according to claim 1, characterized in that: The support frame (2) is a square frame, and the inner ring of the support frame (2) at least covers the air inlet side opening of the heat exchange core (1); the lower frame edge (21) of the support frame (2) abuts against the first frame edge (411), and a second positioning hole (211) is provided on the lower frame edge (21) for plugging into the positioning pin (412).

3. The filter installation structure according to claim 2, characterized in that: The outer frame (41) is a square frame, and multiple groups of the outer frames (41) are distributed in the support frame (2) in a rectangular array. The outer frames (41) on the outermost side of the rectangular array abut against the inner circle of the support frame (2), and adjacent outer frames (41) in the same row abut against each other, and adjacent outer frames (41) in the same column abut against each other.

4. The filter installation structure according to claim 3, characterized in that: A plurality of positioning pins (412) are provided on the first frame edge (411) of any group of the outer frames (41), the number of the second positioning holes (211) is greater than or equal to the number of the positioning pins (412), and within the length range of the lower frame edge (21), there are some second positioning holes (211) whose positions correspond one-to-one to the positioning pins (412); In two adjacent groups of outer frames (41) in the same column, the first positioning holes (414) and the positioning pins (412) are identical in number and have one-to-one corresponding positions.

5. The filter installation structure according to claim 4, characterized in that: In any group of the plurality of positioning pins (412) on the outer frame (41), the spacings between adjacent positioning pins (412) are L1, L2, ..., L N , N is the number of the positioning pins (412) minus one; When N=2, L1≠L2; When N≥3, L1, L2...L N There are at least three different values.

6. The filter installation structure according to claim 5, characterized in that: The number of the positioning pins (412) in any group of the outer frames (41) is two, and the distances between the two positioning pins (412) and the center line of the outer frames (41) are different.

7. The filter installation structure according to claim 2, characterized in that: The limiting member comprises a rotary pressing piece, which is rotatably arranged and has at least one rotational position, so that the end of the rotary pressing piece protrudes from the inner ring of the support frame (2) to press the outer frame (41) tightly into the support frame (2).

8. A machine room air conditioner, comprising a frame (3) and a heat exchange core (1) arranged on the frame (3), characterized in that: It also includes a filter installation structure provided on the air inlet side of the heat exchange core (1), and the filter installation structure is the filter installation structure according to any one of claims 1 to 7.

9. The computer room air conditioner according to claim 8, characterized in that: The air inlet side of the heat exchange core (1) is provided with an inclined surface, a support frame (2) is provided at the inclined surface, a lower frame edge (21) of the support frame (2) is provided on the side of the frame (3), and an upper frame edge of the support frame (2) is located inside the frame (3).

10. The computer room air conditioner according to claim 9, characterized in that: The frame (3) is provided with a maintenance passage corresponding to the middle portion of the support frame (2); the maintenance passage is provided on the frame (3) and is arranged close to the filter assembly (4).

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