Access door mounting structure and air conditioning cabinet

Abstract

This application relates to the field of air conditioning technology, and in particular to an access door mounting structure and an air conditioning unit. The access door mounting structure includes a door frame assembly, a door panel assembly, a fastening element, and fasteners. The door frame assembly has a door frame channel with an opening at one end along its depth direction and a first stop at the other end, spaced apart from the opening along the depth direction of the door frame channel. The fastening element is located on the side of the door frame assembly near the opening and has a through hole. The fastener passes through the through hole and is connected to the door frame assembly, with a gap between the outer wall of the fastener and the inner wall of the through hole. The fastener is threaded into the door frame assembly, and when the fastener moves towards the door frame assembly, it presses the fastening element against the door frame assembly and the door panel assembly, causing the door panel assembly to abut tightly against the first stop. The access door mounting structure and air conditioning unit provided by this application solve the problem of cumbersome operation when opening and closing existing access doors.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an inspection door installation structure and an air conditioning unit. Background Technology

[0002] Currently, air conditioning equipment is often equipped with access doors so that maintenance personnel can open the access doors to repair any malfunctioning components inside the equipment.

[0003] In related technologies, access doors are generally formed by combining a door panel and a door frame, which are usually fastened and locked together with bolts. However, this connection method makes the opening and closing of access doors cumbersome, requiring the bolts to be completely removed before the door panel can be removed, and there is also a risk of the bolts falling off and being lost. Utility Model Content

[0004] Therefore, it is necessary to provide an inspection door installation structure and an air conditioning unit to solve the problem of the cumbersome operation of opening and closing existing inspection doors.

[0005] This application provides an access door installation structure, which includes a door frame assembly, a door panel assembly, a fastening member, and fasteners. The door frame assembly has a through-type door frame channel, with an opening at one end along its depth direction and a first retaining edge extending from each of its two inner walls toward the center of the door frame channel at the other end. The first retaining edges are spaced apart from the opening along the depth direction of the door frame channel. The door panel assembly extends at least partially into the door frame channel through the opening to block the door frame channel. The fastening member is located on the side of the door frame assembly near the opening and has a through hole. The fastener passes through the through hole, and there is a gap between the outer wall of the fastener and the inner wall of the through hole. The fastener is threadedly engaged with the door frame assembly, and when the fastener moves toward the door frame assembly, the fastener presses the fastening member against the door frame assembly and the door panel assembly, and the door panel assembly abuts tightly against the first retaining edge.

[0006] In one embodiment, one side of the fastening member is recessed to form a recess, and the two ends of the recess can respectively abut against the door frame assembly and the door panel assembly.

[0007] In one embodiment, the door panel assembly includes a main board, a first side panel, and a seal. The first side panel is connected to opposite sides of the main board and forms a mounting groove with the main board. The seal is installed in the mounting groove. The thickness of the seal is greater than the depth of the mounting groove.

[0008] In one embodiment, the inner wall of the door frame channel is provided with a second stop at one end near the opening, and the second stop extends in a direction away from the center of the door frame channel; the door panel assembly further includes a second side plate, the second side plate is connected to the main board, and the ends of the second side plate are spaced apart from those of the first side plate, forming a snap-fit ​​groove with the first side plate; wherein, the second stop is inserted into the snap-fit ​​groove and engages with the snap-fit ​​groove.

[0009] In one embodiment, a first connecting hole is provided on the second stop, a first mating hole is provided on the main board, and the inspection door mounting structure further includes a first locking member, which passes through and connects the first mating hole and the first connecting hole.

[0010] In one embodiment, the inner wall of the door frame channel away from the second stop is provided with a third stop, the third stop is connected to the inner wall of the door frame channel near the opening and extends toward the center of the door frame channel; wherein, a second connecting hole is provided on the third stop, a second mating hole is provided on the main board, and the maintenance door mounting structure further includes a second locking member, the second locking member passing through and connecting the second connecting hole and the second mating hole.

[0011] In one embodiment, the door panel assembly further includes a third side panel connected to the end of the main board away from the second side panel, and the third side panel, the main board, and the two first side panels form the mounting groove.

[0012] In one embodiment, the motherboard is provided with reinforcing ribs, and the reinforcing ribs protrude from the surface of the motherboard along the thickness direction of the motherboard.

[0013] In one embodiment, the thickness of the motherboard is D, and 1mm≤D≤1.5mm; and / or, the height of the reinforcing rib along the thickness direction of the motherboard is H, and 3mm≤D≤5mm; and / or, the reinforcing rib extends along the height direction of the motherboard, the height of the motherboard is defined as A, and the length of the reinforcing rib along the height direction of the motherboard is B, wherein 1 / 2≤B / A≤2 / 3.

[0014] In one embodiment, the door panel assembly further includes a door handle connected to the main board, and the number of reinforcing ribs is plurality of them, which are symmetrically arranged relative to the door handle.

[0015] This application also provides an air conditioning unit, which includes the access door mounting structure described in any of the above embodiments.

[0016] Compared with existing technologies, the access door installation structure and air conditioning unit provided in this application, during installation, after the door panel assembly is assembled into the door frame channel through the opening, the fastening member is controlled to cross the connection between the door panel assembly and the door frame assembly, and locked with fasteners. This allows the fastening member to simultaneously abut against both the door frame assembly and the door panel assembly. Furthermore, the door panel assembly can tightly fit against the first stop edge under the force of the fastening member, thus ensuring the stability of the door panel assembly installation and guaranteeing a seal. When disassembling the door panel assembly, only the fasteners need to be partially loosened. Due to the gap between the outer wall of the fastener and the inner wall of the through hole, the two are in a movable fit. Therefore, after the fastener is released, the fastening member will automatically rotate relative to the fastener under the action of gravity. At this time, the force-bearing contact state between the fastening member and the door panel assembly can be released, facilitating the disassembly of the door panel assembly. Thus, the assembly and disassembly of the door panel assembly are relatively simple, greatly improving the efficiency of assembly and disassembly. At the same time, it is not necessary to completely remove the threaded connection between the fasteners and the door frame components, effectively reducing the risk of parts falling off and being lost. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of an air conditioning unit according to an embodiment of this application;

[0019] Figure 2 A front view of an air conditioning unit according to an embodiment provided in this application;

[0020] Figure 3 for Figure 2 Sectional view at point MM;

[0021] Figure 4 for Figure 3 Enlarged view of point Q;

[0022] Figure 5 A partial structural schematic diagram of a door panel assembly according to an embodiment of this application;

[0023] Figure 6 A schematic diagram of the engagement of the snap-fit ​​groove and the second stop edge according to an embodiment provided in this application.

[0024] The symbols in the diagram represent the following meanings:

[0025] 100. Inspection door mounting structure; 10. Door frame assembly; 101. Door frame passage; 102. Opening; 11. First stop; 12. Second stop; 121. First connecting hole; 13. Third stop; 131. Second connecting hole; 20. Door panel assembly; 201. Mounting groove; 202. Snap-fit ​​groove; 21. Sealing element; 22. Main board; 221. First mating hole; 222. Second mating hole; 223. Reinforcing rib; 23. First side plate; 24. Second side plate; 25. Third side plate; 26. Door handle; 30. Fastening element; 31. Recess; 32. Through hole; 40. Fastener; 50. First locking element; 60. Second locking element; 200. Air conditioner housing. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0031] Currently, air conditioning equipment is often equipped with access doors so that maintenance personnel can open the access doors to repair any malfunctioning components inside the equipment.

[0032] In related technologies, access doors are generally formed by combining a door panel and a door frame, which are usually fastened and locked together with bolts. However, this connection method makes the opening and closing of access doors cumbersome, requiring the bolts to be completely removed before the door panel can be removed, and there is also a risk of the bolts falling off and being lost.

[0033] Please see Figures 1-6 To address the cumbersome operation of existing access doors, this application provides an access door mounting structure 100, which is applied to an air conditioning unit 200. The access door mounting structure 100 includes a door frame assembly 10, a door panel assembly 20, a fastener 30, and fasteners 40. The door frame assembly 10 has a through-type door frame channel 101, with an opening 102 at one end along its depth direction. The door panel assembly 20 extends at least partially into the door frame channel 101 through the opening 102 to seal the door frame channel 101. It is easy to understand that the door frame channel 101 is the passage for maintenance personnel. During normal operation of the air conditioning system, it can be sealed by the door panel assembly 20 to prevent the exchange of indoor and outdoor air, thereby reducing the cooling capacity loss of the air conditioning system. Exemplarily, in this embodiment, the door frame channel 101 has a square frame structure with four side walls connected end-to-end; these side walls are the inner walls of the door frame channel 101.

[0034] Specifically, such as Figures 2-4As shown, the other end of the door frame channel 101 along its depth direction is provided with a first stop 11 extending from each of the two side walls toward the center of the door frame channel 101. The first stop 11 is spaced apart from the opening 102 along the depth direction of the door frame channel 101. A fastening member 30 is provided on the side of the door frame assembly 10 near the opening 102. The fastening member 30 has a through hole 32. The fastener 40 passes through the through hole 32, and there is a gap between the outer wall of the fastener 40 and the inner wall of the through hole 32. The fastener 40 is threadedly engaged with the door frame assembly 10. When the fastener 40 moves toward the door frame assembly 10, the fastener 40 presses the fastening member 30 against the door frame assembly 10 and the door panel assembly 20, and the door panel assembly 20 abuts tightly against the first stop 11.

[0035] Understandably, during installation, after the door panel assembly 20 is fitted into the door frame channel 101 through the opening 102, the fastening member 30 is controlled to span the connection between the door panel assembly 20 and the door frame assembly 10, and locked by the fastener 40. This allows the fastening member 30 to simultaneously abut against both the door frame assembly 10 and the door panel assembly 20. Furthermore, the door panel assembly 20 can be tightly fitted against the first stop 11 under the force of the fastening member 30, thereby ensuring the stable installation of the door panel assembly 20 and guaranteeing a seal. When disassembling the door panel assembly 20, only the fastener 40 needs to be partially loosened. Since there is a gap between the outer wall of the fastener 40 and the inner wall of the through hole 32, the two are in a movable fit state. Therefore, after the fastener is released from its locking force, the fastening member 30 can automatically rotate relative to the fastener 40 under the action of gravity. At this time, the force-bearing contact state between the fastening member 30 and the door panel assembly 20 can be released, facilitating the disassembly of the door panel assembly 20. Thus, the assembly and disassembly of the door panel assembly 20 are relatively simple, greatly improving the efficiency of assembly and disassembly. At the same time, it is not necessary to completely disconnect the threaded connection between the fastener 40 and the door frame assembly 10, effectively reducing the risk of parts falling off and being lost.

[0036] To more clearly illustrate the technical solution of this application, this application also defines as follows: Figure 1 The width, depth, and height directions of the door frame channel 101 are shown, and are represented by X, Y, and Z, respectively. The width, depth, and height directions of the door panel assembly 20 correspond to those of the door frame channel 101.

[0037] In one embodiment, such as Figure 4 As shown, a recess 31 is formed on one side of the fastening member 30, and the two ends of the recess 31 can abut against the door frame assembly 10 and the door panel assembly 20 respectively. In this way, the recess 31 facilitates the contact between the fastening member 30 and the door frame assembly 10 and the door panel assembly 20, ensuring reliable contact of the fastening member 30.

[0038] Specifically, the recess 31 can be arc-shaped to avoid stress concentration, thereby improving the structural strength of the clamping member 30. The through hole 32 communicates with the recess 31 and can be configured as an oblong hole to facilitate position adjustment of the clamping member 30 relative to the fastener 40.

[0039] Furthermore, the clamping member 30 can be made of nylon. The clamping member 30 made of nylon has better strength and wear resistance, which can improve the service life of the clamping member 30.

[0040] In one embodiment, such as Figure 2 and Figure 3 As shown, the door panel assembly 20 includes a main board 22, a first side plate 23, and a seal 21. The first side plate 23 is connected to opposite sides of the main board 22 and forms a mounting groove 201 with the main board 22. The seal 21 is installed in the mounting groove 201, wherein the thickness of the seal 21 is greater than the depth of the mounting groove 201. Thus, when the clamping member 30 applies force to the main board 22, it prevents the first side plate 23 from contacting the first retaining edge 11 first, ensuring that the seal 21 can contact the first retaining edge 11 and deform under the pressure of the clamping member 30, thereby achieving a sealing effect.

[0041] To further enhance structural reliability, the thickness of the sealing element 21 can be set to be greater than the distance from the first stop 11 to the opening 102 along the depth direction of the door frame channel 101, so that the main board 22 is flush with the end face of the opening 102 when the fastening member 30 is locked by the fastener 40. Typically, to ensure strength requirements, the main board 22 is made of metal. Since metal has high thermal conductivity, the sealing element 21 can be set as insulation cotton to reduce heat exchange between the inside and outside of the air conditioning unit 200.

[0042] Specifically, in this embodiment, the first retaining edge 11 is disposed on both sides of the door frame channel 101 along its width direction and extends along the height direction of the door frame channel 101. Simultaneously, there are two fastening members 30, each corresponding to one first retaining edge 11. This simplifies the fixing of the door panel assembly 20 along both sides of its width direction, effectively improving installation efficiency. Preferably, the fastening member 30 is disposed in the middle of the height direction of the door frame channel 101 to ensure the sealing effect between the sealing member 21 and the first retaining edge 11.

[0043] In one embodiment, such as Figure 5 and Figure 6As shown, a second stop 12 is provided at one end of the inner wall of the door frame channel 101 near the opening 102, and the second stop 12 extends in a direction away from the center of the door frame channel 101. The door panel assembly 20 also includes a second side plate 24, which is connected to the main plate 22. The ends of the second side plate 24 and the first side plate 23 are spaced apart, and a snap-fit ​​groove 202 is formed between the second side plate 24 and the first side plate 23. The second stop 12 is inserted into the snap-fit ​​groove 202 and engages with it. The snap-fit ​​between the second stop 12 and the snap-fit ​​groove 202 enables the pre-fixation of the door panel assembly 20, which is beneficial for subsequent assembly.

[0044] Furthermore, a first connecting hole 121 is provided on the second stop 12, and a first mating hole 221 is provided on the main board 22. The access door mounting structure 100 also includes a first locking member 50, which passes through and connects the first mating hole 221 and the first connecting hole 121. In this way, the connection strength between the door panel assembly 20 and the door frame assembly 10 is further improved.

[0045] In one embodiment, such as Figure 2 As shown, a third stop 13 is provided on the inner wall of the door frame channel 101 at the end away from the second stop 12. The third stop 13 is connected to the end of the inner wall of the door frame channel 101 near the opening 102 and extends towards the center of the door frame channel 101. That is, when the door panel assembly 20 is assembled on the door frame assembly 10, the third stop 13 is positioned closer to the outside of the air conditioning unit 200 relative to the main board 22. The third stop 13 has a second connecting hole 131, the main board 22 has a second mating hole 222, and the access door mounting structure 100 also includes a second locking member 60, which passes through and connects the second connecting hole 131 and the second mating hole 222. This further enhances the connection strength between the door panel assembly 20 and the door frame assembly 10.

[0046] Specifically, the second stop 12 and the third stop 13 are respectively located on both sides of the door frame channel 101 along its own height direction. Based on this, when assembling the door panel assembly 20, the end of the main board 22 away from the second side plate 24 can be inserted into the door frame channel 101 first, and then moved upward along the height direction of the door frame channel 101 until the locking groove 202 is aligned and inserted with the second stop 12. At this time, the door panel assembly 20 is pre-fixed as a whole. During this process, the two first side plates 23 can be used to slide and guide the corresponding two side walls on the door frame channel 101 to ensure the reliability of the movement. Finally, the first locking member 50, the second locking member 60 and the fastener 40 are locked to realize the fixed connection between the door panel assembly 20 and the door frame assembly 10. The assembly is simple and quick.

[0047] Furthermore, such as Figure 5As shown, the door panel assembly 20 also includes a third side plate 25, which is connected to the end of the main board 22 away from the second side plate 24. The third side plate 25, the main board 22, and the two first side plates 23 form a mounting groove 201. This further improves the installation reliability of the seal 21 and the main board 22. When the door panel assembly 20 is installed on the door frame assembly 10, the inner wall of the door frame channel 101 connected to the second stop 12, the third side plate 25, and the two first side plates 23 abut against the periphery of the seal 21, ensuring the stable installation of the seal 21.

[0048] In one embodiment, the main board 22, the first side plate 23, the second side plate 24 and the third side plate 25 are integrally bent thin plates, which effectively improves the overall structural strength, prevents deformation and reduces costs.

[0049] Specifically, the thickness of the motherboard 22 is D, and 1mm≤D≤1.5mm. Thus, the motherboard 22 is relatively thin, which can effectively reduce costs. The thickness D of the motherboard 22 can be set to 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm or 1.5mm, etc., which will not be listed here.

[0050] To further enhance the structural strength of the motherboard 22, in one embodiment, such as Figure 2 As shown, the motherboard 22 is provided with reinforcing ribs 223, which protrude from the surface of the motherboard 22 along its thickness direction. This effectively reduces the probability of deformation of the motherboard 22. The reinforcing ribs 223 can extend along the height direction of the motherboard 22. Since the motherboard 22 is relatively tall, the structural strength of the motherboard 22 can be further improved by providing reinforcing ribs 223 extending along its height direction. However, this is not a limitation; the reinforcing ribs 223 can also extend along the width direction of the motherboard 22, and can be reasonably set according to actual needs.

[0051] Furthermore, in one embodiment, the door panel assembly 20 also includes a door handle 26 connected to the main board 22. The door handle 26 can be located in the middle of the main board 22, providing stable force distribution and facilitating the movement and operation of the main board 22. Multiple reinforcing ribs 223 are provided, symmetrically arranged relative to the door handle 26. This ensures that when the main board 22 is pulled by the door handle 26, the force on the main board 22 around the door handle 26 is evenly distributed, preventing excessive localized force that could lead to defects such as tearing.

[0052] In one embodiment, the height of the reinforcing rib 223 along the thickness direction of the motherboard 22 is H, and 3mm ≤ D ≤ 5mm. This effectively ensures the structural strength of the reinforcing rib 223 itself, thereby improving the reinforcement effect on the motherboard 22. It is easy to understand that when D > 5mm, the height of the reinforcing rib 223 is too high, which can easily increase the difficulty of processing. When D < 3mm, the height of the reinforcing rib 223 is insufficient, and the reinforcement effect on the motherboard 22 is limited.

[0053] Optionally, the value of H can be 3mm, 3.5mm, 4mm, 4.5mm or 5mm, etc.

[0054] In one embodiment, the height of the main board 22 is defined as A, and the length of the reinforcing rib 223 along the height direction of the main board 22 is defined as B, where 1 / 2 ≤ B / A ≤ 2 / 3. This increases the effective coverage of the reinforcing rib 223 in strengthening the structure of the main board 22. If B / A > 2 / 3, the length of the reinforcing rib 223 is too long, which may cause interference between the reinforcing rib 223 and other structures. If B / A < 1 / 2, the length of the reinforcing rib 223 is insufficient, and the main board 22 is at risk of deformation.

[0055] Optionally, the value of B can be A / 2, 0.55A, 0.6A, 0.65A, or 2A / 3, etc. Furthermore, as an example, the distance between the end of the reinforcing rib 223 and the end of the motherboard 22 can be set to be greater than or equal to 100mm.

[0056] This application also provides an air conditioning unit 200, which includes the access door mounting structure 100 of any of the above embodiments.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0058] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A maintenance door installation structure, characterized in that, The device includes a door frame assembly (10), a door panel assembly (20), a fastener (30), and a fastener (40). The door frame assembly (10) has a through door frame channel (101). One end of the door frame channel (101) along its depth direction has an opening (102), and the other end of the door frame channel (101) has a first stop (11) extending from each of the two inner walls toward the center of the door frame channel (101). The first stop (11) is spaced apart from the opening (102) along the depth direction of the door frame channel (101). The door panel assembly (20) extends at least partially into the door frame channel (101) through the opening (102) to block the door frame channel (101). The fastening member (30) is provided on the side of the door frame assembly (10) near the opening (102). The fastening member (30) has a through hole (32). The fastener (40) passes through the through hole (32), and there is a gap between the outer wall of the fastener (40) and the inner wall of the through hole (32). The fastener (40) is threadedly engaged with the door frame assembly (10), and when the fastener (40) moves toward the door frame assembly (10), the fastener (40) presses the snap fastener (30) against the door frame assembly (10) and the door panel assembly (20), and the door panel assembly (20) abuts tightly against the first stop (11).

2. The inspection door installation structure according to claim 1, characterized in that, The fastener (30) has a recess (31) formed on one side, and the two ends of the recess (31) can abut against the door frame assembly (10) and the door panel assembly (20) respectively.

3. The inspection door installation structure according to claim 1, characterized in that, The door panel assembly (20) includes a main board (22), a first side plate (23) and a sealing element (21). The first side plate (23) is connected to the opposite sides of the main board (22) and forms a mounting groove (201) with the main board (22). The sealing element (21) is installed in the mounting groove (201). The thickness of the seal (21) is greater than the depth of the mounting groove (201).

4. The inspection door installation structure according to claim 3, characterized in that, The inner wall of the door frame passage (101) near the opening (102) is provided with a second stop (12), and the second stop (12) extends in a direction away from the center of the door frame passage (101); The door panel assembly (20) further includes a second side panel (24), which is connected to the main board (22). The second side panel (24) is spaced apart from the end of the first side panel (23) and forms a snap-fit ​​groove (202) with the first side panel (23). The second stop (12) is inserted into the snap-fit ​​groove (202) and engages with the snap-fit ​​groove (202).

5. The inspection door installation structure according to claim 4, characterized in that, The second stop (12) is provided with a first connecting hole (121), the main board (22) is provided with a first mating hole (221), and the inspection door installation structure also includes a first locking member (50), which passes through and connects the first mating hole (221) and the first connecting hole (121).

6. The inspection door installation structure according to claim 4, characterized in that, The inner wall of the door frame channel (101) away from the second stop (12) is provided with a third stop (13). The third stop (13) is connected to the inner wall of the door frame channel (101) near the opening (102) and extends toward the center of the door frame channel (101). The third stop (13) is provided with a second connecting hole (131), the main board (22) is provided with a second mating hole (222), and the maintenance door installation structure also includes a second locking member (60), which passes through and connects the second connecting hole (131) and the second mating hole (222).

7. The inspection door installation structure according to claim 4, characterized in that, The door panel assembly (20) also includes a third side panel (25), which is connected to the end of the main board (22) away from the second side panel (24), and the third side panel (25), the main board (22) and the two first side panels (23) form the mounting groove (201).

8. The inspection door installation structure according to claim 3, characterized in that, The motherboard (22) is provided with reinforcing ribs (223), and the reinforcing ribs (223) protrude from the surface of the motherboard (22) along the thickness direction of the motherboard (22).

9. The inspection door installation structure according to claim 8, characterized in that, The thickness of the motherboard (22) is D, and 1mm≤D≤1.5mm; And / or, the height of the reinforcing rib (223) along the thickness direction of the main board (22) is H, and 3mm≤D≤5mm; And / or, the reinforcing rib (223) extends along the height direction of the main board (22), the height of the main board (22) is defined as A, and the length of the reinforcing rib (223) along the height direction of the main board (22) is B, wherein 1 / 2≤B / A≤2 / 3.

10. The inspection door installation structure according to claim 8, characterized in that, The door panel assembly (20) also includes a door handle (26) connected to the main board (22), and there are multiple reinforcing ribs (223), which are symmetrically arranged relative to the door handle (26).

11. An air conditioning unit, characterized in that, Includes the access door mounting structure as described in any one of claims 1-10.

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