Back-mounted passenger car air conditioning unit

Abstract

The utility model relates to a back-mounted passenger car air conditioning unit. The back-mounted passenger car air conditioning unit comprises a unit main body frame, a compressor module, a unit movable frame, a condenser module and a refrigerant hose. According to the back-mounted passenger car air conditioning unit, the air conditioning unit is divided into two parts, the compressor module is installed in the unit main body frame, and the condenser module is installed in the unit movable frame; the unit movable frame is connected with the unit main body frame through a first hinge, and the compressor module is connected with the condenser module through a refrigerant hose. Thus, when the air conditioning unit needs to be maintained and overhauled, as shown in the figure, the unit movable frame is rotated from the first position to the second position, maintenance personnel can conveniently conduct maintenance operation through the gap used for maintenance between the unit movable frame and the unit main body frame, the necessity of dismounting and overhauling of the whole unit is reduced to a certain degree, and the maintenance efficiency is improved. The maintenance cost of the air conditioning unit can be saved.

Description

Technical Field

[0001] This application belongs to the field of bus air conditioning technology, and in particular relates to a rear-mounted bus air conditioning unit. Background Technology

[0002] Currently, the most common rear-mounted air conditioners for buses (especially pure electric air conditioners) are usually installed at the rear of the vehicle and fixed to the chassis frame. New energy bus air conditioners have many electrical components such as frequency converters and compressors integrated into the air conditioning unit. There are many air conditioning components and wiring harnesses, leaving very little space for later maintenance. Moreover, after installation, maintenance or replacement of vulnerable parts can only be done through the air intake grilles on both sides of the bus. In addition, the parts close to the inside of the air conditioning unit are difficult to access, and in many cases, the entire unit must be removed for maintenance. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a rear-mounted bus air conditioning unit to solve the problem of difficult maintenance of rear-mounted bus air conditioning units in the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a rear-mounted bus air conditioning unit, comprising:

[0005] The main frame of the generator set is used to fix it to the main body of the passenger car;

[0006] The compressor module is installed within the main frame of the unit.

[0007] The unit's movable frame is hinged to the unit's main frame. The unit's movable frame can rotate to at least a first position and a second position. When the unit's movable frame is in the first position, it is in contact with the unit's main frame. When the unit's movable frame is in the second position, a gap for maintenance is formed between the unit's movable frame and the unit's main frame.

[0008] The condenser module is installed within the movable frame of the unit;

[0009] The refrigerant hose has its two ends connected to the compressor module and the condenser module, respectively. The refrigerant hose is deformable, and when the movable frame of the unit rotates from the first position to the second position, the refrigerant hose can deform so that one end moves away from the other end.

[0010] In an optional embodiment, the rear-mounted bus air conditioning unit further includes a hose bracket, which is connected to the unit's movable frame via a second hinge; the unit's movable frame is connected to the unit's main frame via several first hinges, the pivots of the second hinges being parallel to the pivots of the first hinges; and the refrigerant hose portion passes through the hose bracket.

[0011] In an optional embodiment, the hose support includes: a support body and a limiting frame, the two ends of the support body are respectively connected to the second hinge and the limiting frame, the limiting frame has a hollow portion, and the refrigerant hose passes through the hollow portion.

[0012] In an optional embodiment, the hollow portion extends along the axial direction of the second hinge, and when the refrigerant hose deforms, the portion of the refrigerant hose located within the hollow portion is movable along the axial direction of the second hinge.

[0013] In an optional embodiment, the limiting frame is connected to the bracket body via a third hinge, the pivot of the third hinge being parallel to the pivot of the second hinge.

[0014] In an optional embodiment, the support body includes:

[0015] The first plate extends along the plane containing the X and Z directions;

[0016] The second plate extends along the plane containing the X and Y directions, which are perpendicular to the Z direction. The second plate is located at both ends of the first plate along the Z direction, and the two ends of the second plate along the X direction are connected to the second hinge and the limiting frame, respectively.

[0017] In an optional embodiment, the rear-mounted bus air conditioning unit further includes fasteners, which can fix the movable frame of the unit to the main frame of the unit when the movable frame of the unit is attached to the main frame of the unit.

[0018] In an optional embodiment,

[0019] The bottom of the main frame of the unit includes a frame beam extending into the movable frame of the unit;

[0020] The fastener includes a first fixing plate. When the movable frame of the unit is in the first position, the first fixing plate can be detachably fixed to the frame beam and detachably fixed to the movable frame of the unit to fix the movable frame of the unit in the first position.

[0021] In an optional embodiment,

[0022] The main frame of the unit also includes longitudinal frame beams perpendicular to the crossbeams of the frame;

[0023] The fastener further includes a second fixing plate, which includes a first connecting piece and a second connecting piece; when the unit's movable frame is in the first position, both the first connecting piece and the second connecting piece abut against at least one side of the unit's movable frame;

[0024] One end of the first connecting piece is sleeved on the frame longitudinal beam and can be separated from the frame longitudinal beam by moving along the frame longitudinal beam. The other end of the first connecting piece can be detachably fixed to the second connecting piece, and the second connecting piece can be detachably fixed to the unit movable frame.

[0025] In an optional embodiment, the fastener further includes a positioning plate fixed to the frame longitudinal beam, the positioning plate being used to limit the range of movement of the first connecting piece along the frame longitudinal beam.

[0026] The beneficial effects of this utility model are as follows: the air conditioning unit is divided into two parts: the compressor module is installed inside the main frame of the unit, while the condenser module is installed inside the movable frame of the unit; the movable frame is hinged to the main frame of the unit, and the compressor module and the condenser module are connected by a refrigerant hose. Thus, when the air conditioning unit requires maintenance, the movable frame can be rotated from the first position to the second position, allowing maintenance personnel to easily utilize the gap between the movable frame and the main frame for maintenance operations. This reduces the necessity of disassembling the entire unit for maintenance to a certain extent, thereby saving on the maintenance costs of the air conditioning unit. Attached Figure Description

[0027] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0028] Figure 1 This is a schematic diagram of the normal operating state of the rear-mounted bus air conditioning unit according to an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the rear-mounted bus air conditioning unit under maintenance and disassembly according to an embodiment of this application;

[0030] Figure 3 This is a top view of the rear-mounted bus air conditioning unit in the maintenance and disassembly state according to an embodiment of this application;

[0031] Figure 4 yes Figure 2 A magnified view of a portion of the image;

[0032] Figure 5 This is a schematic diagram of the flexible hose support structure according to an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of the fastener structure according to an embodiment of this application;

[0034] Figure 7 This is a schematic diagram of the fastener removal process according to an embodiment of this application;

[0035] Figure 8 This is a partially enlarged view of the top structure of the main frame of the unit according to an embodiment of this application.

[0036] The attached figures are labeled as follows:

[0037] 1. Main frame of the unit; 11. Frame crossbeams; 12. Frame longitudinal beams;

[0038] 2. Compressor module;

[0039] 3. Unit movable frame; 31. First hinge;

[0040] 4. Condenser module;

[0041] 5. Refrigerant hose;

[0042] 6. Flexible hose bracket; 61. Second hinge; 62. Bracket body; 63. Limiting frame; 64. Third hinge; 621. First plate; 622. Second plate; 631. Hollow part;

[0043] 7. Fastener; 71. First fixing plate; 72. Second fixing plate; 73. Positioning plate;

[0044] 721. First connecting piece; 722. Second connecting piece; 723. Notch. Detailed Implementation

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0046] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will be able to understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In the description of this application, the X direction, Y direction, or Z direction, unless otherwise specified, can mean along a straight line without a specific direction, or it can mean along a straight line with a positive and negative direction.

[0049] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] This embodiment provides a rear-mounted bus air conditioning unit, such as... Figures 1-3 As shown, it includes: the main frame of the unit 1, the compressor module 2, the movable frame of the unit 3, the condenser module 4, and the refrigerant hose 5.

[0051] The main frame 1 of the generator set is used to fix it to the main body of the bus; the compressor module 2 is installed inside the main frame 1 of the generator set.

[0052] The unit's movable frame 3 is hinged to the unit's main frame 1. The unit's movable frame 3 can rotate to at least a first position and a second position. When the unit's movable frame 3 is in the first position, the unit's movable frame 3 is in contact with the unit's main frame 1. When the unit's movable frame 3 is in the second position, a gap for maintenance is formed between the unit's movable frame 3 and the unit's main frame 1. The condenser module 4 is installed inside the unit's movable frame 3.

[0053] The two ends of the refrigerant hose 5 are connected to the compressor module 2 and the condenser module 4, respectively. The refrigerant hose 5 can deform. When the unit's movable frame 3 rotates from the first position to the second position, the refrigerant hose 5 can deform so that one end moves away from the other end.

[0054] The rear-mounted bus air conditioning unit provided in this embodiment is installed at the rear of the bus. Under normal circumstances, the rear casing of the bus covers the air conditioning unit, and the internal air conditioning unit is not visible from the outside of the bus. When the air conditioning unit needs to be repaired, the repair personnel first remove the rear casing, and then can observe... Figure 1 The exposed air conditioning unit is shown, with the movable frame 3 of the unit in the first position.

[0055] The rear-mounted bus air conditioning unit provided in this embodiment divides the unit into two parts: the compressor module 2 is installed within the main frame 1, and the condenser module 4 is installed within the movable frame 3. The movable frame 3 is hinged to the main frame 1, and the compressor module 2 and the condenser module 4 are connected by a refrigerant hose 5. Thus, when the air conditioning unit requires maintenance or repair, such as... Figure 2 As shown, rotating the movable frame 3 of the unit from the first position to the second position makes it convenient for maintenance personnel to carry out maintenance operations using the gap between the movable frame 3 and the main frame 1 of the unit. This reduces the necessity of disassembling and maintaining the entire unit to a certain extent and can save on the maintenance costs of the air conditioning unit.

[0056] During the maintenance process, the curvature of the refrigerant hose 5 connecting the compressor module 2 and the condenser module 4 changes to adapt to the change in position of the unit's movable frame 3. When the maintenance is completed and the unit's movable frame 3 returns to its first position, the refrigerant hose 5 can also adapt to the change in position of the unit's movable frame 3 by deformation. That is, the connection relationship between the compressor module 2 and the condenser module 4 does not change during the entire maintenance process, and there is no need to reconnect them, which brings certain convenience.

[0057] Among them, such as Figure 1 As shown, the unit's movable frame 3 can be connected to the unit's main frame 1 via several first hinges 31.

[0058] In an alternative embodiment, such as Figure 3 , Figure 4 As shown, the rear-mounted bus air conditioning unit also includes a hose bracket 6. The hose bracket 6 is connected to the unit's movable frame 3 via a second hinge 61, the axis of rotation of the second hinge 61 being parallel to the axis of rotation of the first hinge 31. A portion of the refrigerant hose 5 passes through the hose bracket 6. In this embodiment, the hose bracket 6 provides certain support and limitation for the refrigerant hose 5, preventing uncontrollable deformation of the refrigerant hose 5 during the movement of the unit's movable frame 3, and preventing the refrigerant hose 5 from failing to synchronously reset when the unit's movable frame 3 resets. The parallelism between the axis of rotation of the second hinge 61 and the axis of rotation of the first hinge 31 allows the rotation path of the hose bracket 6 to be parallel to the unit's movable frame 3, enabling the hose bracket 6 to adaptively rotate accordingly during the rotation of the unit's movable frame 3.

[0059] In an alternative embodiment, such as Figure 5As shown, the hose support 6 includes a support body 62 and a limiting frame 63. The two ends of the support body 62 are respectively connected to a second hinge 61 and the limiting frame 63. The limiting frame 63 has a hollow portion 631 through which the refrigerant hose 5 passes. In this embodiment, the hose support 6 has a limiting frame 63 specifically designed to restrict the position of the refrigerant hose 5. When installing the refrigerant hose 5, the refrigerant hose 5 passes through the hollow portion 631. This ensures that during the deformation of the refrigerant hose 5, a portion of the refrigerant hose 5 will not move outside the limiting frame 63, preventing the refrigerant hose 5 from failing to return to its original position.

[0060] In an alternative embodiment, such as Figure 2 As shown, the two ends of the refrigerant hose 5 are located at the lower part of the vertical direction relative to the middle, that is, the middle of the refrigerant hose 5 is arched upwards. The hose bracket 6 is connected to the upper part of the unit's movable frame 3 and is set corresponding to the arched position in the middle of the refrigerant hose 5, which can facilitate the support of the arched position in the middle of the refrigerant hose 5.

[0061] In an alternative embodiment, such as Figure 5 As shown, the hollow portion 631 extends along the Z direction. Figure 5 In this embodiment, the Z-direction is the axial direction of the second hinge 61, and the X and Y directions are both perpendicular to the Z-direction. When the refrigerant hose 5 deforms, the portion of the refrigerant hose 5 located within the hollow portion 631 can move along the axial direction of the second hinge 61. In this embodiment, the hollow portion 631 is designed to extend along the Z-direction. During the actual deformation process, the main activities of the portion of the refrigerant hose 5 located within the hollow portion 631 are the movement of the two ends moving away from or towards each other, and the movement of the middle portion in the vertical direction (Z-direction). Therefore, this structure can easily provide the necessary movement space for the portion of the refrigerant hose 5 located within the hollow portion 631, avoiding excessive restriction of the refrigerant hose 5 and causing compression damage to the refrigerant hose 5.

[0062] In an alternative embodiment, such as Figure 5 As shown, the limiting frame 63 is connected to the support body 62 via a third hinge 64. The rotation axis of the third hinge 64 is parallel to the rotation axis of the second hinge 61 (both along the Z direction). In this embodiment, by designing the limiting frame 63 as a rotatable structure, with the rotation axis axially the same as that of the second hinge 61 and the first hinge 31, the limiting frame 63 can adaptively rotate during the rotation of the unit's movable frame 3. This provides both limiting of the refrigerant hose 5 and sufficient range of motion for the refrigerant hose 5, preventing excessive limiting of the refrigerant hose 5 and resulting in compression damage.

[0063] In an alternative embodiment, such as Figure 5As shown, the bracket body 62 includes a first plate 621 and a second plate 622. The first plate 621 extends along the planes containing the X and Z directions; the second plate 622 extends along the planes containing the X and Y directions, with the X and Y directions perpendicular to the Z direction. The second plate 622 is located at both ends of the first plate 621 along the Z direction, and both ends of the second plate 622 along the X direction are connected to the second hinge 61 and the limiting frame 63, respectively. In this embodiment, the bracket body 62 has a simple structure, consisting only of simple sheet metal, and can be directly made of sheet metal (for example, the second plate 622 and the first plate 621 can be directly formed from a single sheet metal using sheet metal processing), resulting in low manufacturing costs. In actual installation and use, the Z direction is installed vertically. In this way, the first plate 621, extending along the planes containing the X and Z directions, can withstand a large vertical force, such as gravity, while the second plate 622, extending along the planes containing the X and Y directions, can provide sufficient installation space for the limiting frame 63.

[0064] In an alternative embodiment, such as Figure 1 As shown, the rear-mounted bus air conditioning unit also includes a fastener 7. When the unit's movable frame 3 is attached to the unit's main frame 1, the fastener 7 can fix the movable frame 3 and the main frame 1 together. In this embodiment, the fastener 7 facilitates the fixing of the unit's movable frame 3.

[0065] In an alternative embodiment, such as Figure 2 As shown, the bottom of the main frame 1 of the unit includes a frame beam 11 extending towards the movable frame 3 of the unit; as Figure 6 As shown, the fastener 7 includes a first fixing plate 71. When the unit's movable frame 3 is in the first position, the first fixing plate 71 can be detachably fixed to the frame beam 11 and detachably fixed to the unit's movable frame 3, thereby fixing the unit's movable frame 3 in the first position. In this embodiment, the extension of the bottom frame beam 11 of the unit's main frame 1 facilitates the installation of the first fixing plate 71 to fix the unit's movable frame 3. The first fixing plate 71 is detachable, making it convenient to remove during maintenance. Optionally, the first fixing plate 71 can be fixed to the frame beam 11 or the unit's movable frame 3 by screws.

[0066] In an alternative embodiment, such as Figures 6-7As shown, the main frame 1 of the unit also includes a longitudinal frame beam 12 perpendicular to the frame crossbeam 11; the fastener 7 also includes a second fixing plate 72, which includes a first connecting piece 721 and a second connecting piece 722; when the movable frame 3 of the unit is in the first position, both the first connecting piece 721 and the second connecting piece 722 abut against at least one side of the movable frame 3 of the unit; one end of the first connecting piece 721 is sleeved on the longitudinal frame beam 12 and can be separated from the longitudinal frame beam 12 by moving along the longitudinal frame beam 12, and the other end of the first connecting piece 721 can be detachably fixed to the second connecting piece 722, and the second connecting piece 722 can be detachably fixed to the movable frame 3 of the unit. In this embodiment, the second fixing plate 72 further increases the fixing reliability of the fastener 7 based on the fastener 7 including the first fixing plate 71. The second fixing plate 72 is divided into two parts, and the method for maintenance and removal of the second fixing plate 72 is: first remove the second connecting piece 722, and then... Figure 7 As shown, the first connecting piece 721 is moved along the frame longitudinal beam 12 (Z direction) and separated from the frame longitudinal beam 12, at which point the second fixing plate 72 is completely removed. This structural design solves the problem of insufficient space at the top of the unit. Utilizing the split structure of the second fixing plate 72, a detachable connection with the frame longitudinal beam 12 is achieved without causing inconvenience in disassembly and assembly. Optionally, the first connecting piece 721 and the second connecting piece 722 are fixed together with screws, and the second connecting piece 722 is fixed to the movable frame 3 of the unit with screws.

[0067] In an alternative embodiment, such as Figure 7 As shown, the first connecting piece 721 is used to fit onto the hook-shaped part at one end of the frame longitudinal beam 12, and a notch 723 is reserved at the top of the main frame 1 of the unit for the hook-shaped part to come out.

[0068] In an alternative embodiment, such as Figure 8 As shown, the fastener 7 also includes a positioning plate 73, which is fixed to the frame longitudinal beam 12. The positioning plate 73 is used to limit the range of movement of the first connecting piece 721 along the frame longitudinal beam 12. In this embodiment, the function of the positioning plate 73 is to facilitate determining the installation position of the first connecting piece 721, especially when maintenance personnel need to reinstall the fastener 7, they need to install the first connecting piece 721 to a specific height to align with the second connecting piece 722. Therefore, by installing the positioning plate 73, the range of movement of the first connecting piece 721 along the frame longitudinal beam 12 is limited. With this setting, when maintenance personnel reinstall the first connecting piece 721, they only need to ensure that the first connecting piece 721 abuts against the positioning plate 73 to know that it is installed in place. On the other hand, the setting of the positioning plate 73 also avoids the problem of maintenance personnel accidentally dropping the first connecting piece 721 due to limited viewing angle when reinstalling it. When the first connecting piece 721 falls, it will land on the positioning plate 73.

[0069] Based on the above-described preferred embodiments according to this application, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this application. The technical scope of this application is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A rear-mounted bus air conditioning unit, characterized by comprising: The back-mounted air conditioner for passenger vehicle comprises a main frame (1) for being fixed to a main body of a passenger vehicle, a compressor module (2) installed in the main frame (1), a movable frame (3) hinged to the main frame (1) and capable of being rotated to at least a first position and a second position, wherein the movable frame (3) is flush with the main frame (1) when being in the first position, and a gap is formed between the movable frame (3) and the main frame (1) for maintenance when being in the second position, a condenser module (4) installed in the movable frame (3), and a refrigerant hose (5) having two ends connected to the compressor module (2) and the condenser module (4) respectively, wherein the refrigerant hose (5) is capable of being deformed, and the refrigerant hose (5) is capable of moving away from one end to the other end by deformation when the movable frame (3) is rotated from the first position to the second position. The back-mounted air conditioner for passenger vehicle further comprises a hose support (6) connected to the movable frame (3) through a second hinge (61), wherein the movable frame (3) is connected to the main frame (1) through a plurality of first hinges (31), the rotation axis of the second hinge (61) is parallel to the rotation axis of the first hinge (31), and the refrigerant hose (5) is partially arranged in the hose support (6). The hose support (6) comprises a support main body (62) and a limiting frame (63), wherein the two ends of the support main body (62) are connected to the second hinge (61) and the limiting frame (63) respectively, the limiting frame (63) has a hollow portion (631), and the refrigerant hose (5) is arranged in the hollow portion (631). The hollow portion (631) extends along the axial direction of the second hinge (61), and the part of the refrigerant hose (5) arranged in the hollow portion (631) is capable of moving along the axial direction of the second hinge (61) when the refrigerant hose (5) is deformed. The limiting frame (63) is connected to the support main body (62) through a third hinge (64), and the rotation axis of the third hinge (64) is parallel to the rotation axis of the second hinge (61). The support main body (62) comprises a first plate body (621) extending along the plane of X direction and Z direction, and a second plate body (622) extending along the plane of X direction and Y direction, wherein the X direction, the Y direction and the Z direction are perpendicular to each other, the second plate body (622) is arranged at the two ends of the first plate body (621) along the Z direction, and the two ends of the second plate body (622) along the X direction are connected to the second hinge (61) and the limiting frame (63) respectively.

2. The rear-mounted transit air conditioning unit of claim 1, wherein, ​ 3. The rear-mounted transit air conditioning unit of claim 2, wherein, ​ 4. The rear-mounted transit air conditioning unit of claim 3, wherein, ​ 5. The rooftop transit air conditioning unit of claim 3, wherein, ​ 6. The rooftop bus air conditioning unit of any of claims 3-5, wherein, ​ ​ ​ 7. The rear-mounted bus air conditioning unit according to any one of claims 1-5, characterized in that, The back-mounted passenger vehicle air conditioning unit further comprises a buckle (7), when the unit movable frame (3) is attached to the unit main frame (1), the unit movable frame (3) and the unit main frame (1) can be fixed by the buckle (7).

8. The back-mounted passenger vehicle air conditioning unit according to claim 7, characterized in that, the bottom of the unit main frame (1) comprises a frame crossbeam (11) extending to the unit movable frame (3); the buckle (7) comprises a first fixing plate (71), when the unit movable frame (3) is in the first position, the first fixing plate (71) can be detachably fixed with the frame crossbeam (11) and the unit movable frame (3) to fix the unit movable frame (3) in the first position.

9. The back-mounted passenger vehicle air conditioning unit according to claim 8, characterized in that, the unit main frame (1) further comprises a frame longitudinal beam (12) perpendicular to the frame crossbeam (11); the buckle (7) further comprises a second fixing plate (72), the second fixing plate (72) comprises a first connecting piece (721) and a second connecting piece (722); when the unit movable frame (3) is in the first position, the first connecting piece (721) and the second connecting piece (722) abut against at least one side of the unit movable frame (3); one end of the first connecting piece (721) is sleeved on the frame longitudinal beam (12) and can be separated from the frame longitudinal beam (12) by moving along the frame longitudinal beam (12), the other end of the first connecting piece (721) can be detachably fixed with the second connecting piece (722), and the second connecting piece (722) can be detachably fixed with the unit movable frame (3).

10. The rooftop transit air conditioning unit of claim 9, wherein, the buckle (7) further comprises a positioning plate (73), the positioning plate (73) is fixed on the frame longitudinal beam (12), and the positioning plate (73) is used to limit the range of movement of the first connecting piece (721) along the frame longitudinal beam (12).

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