A fresh air module and duct unit

Abstract

This application provides a fresh air module and a ducted air conditioner. The fresh air module includes: a housing with a first inspection port; an inspection cover detachably covering the first inspection port; a volute with an installation opening at one axial end facing the first inspection port, and an air inlet channel; a guide ring located at the installation opening and having an air inlet communicating with the installation opening; the guide ring is detachably connected to the volute, the air inlet channel is located radially outside the installation opening and communicates with the air inlet; and a filter assembly including a mounting bracket and a filter mounted on the mounting bracket, the filter being located between the air inlet channel and the air inlet, and the air inlet channel including a first air passage and a second air passage, the second air passage communicating with the air inlet. Thus, the entire volute does not need to be removed for maintenance of the fresh air module.

Description

[0001] This application is a divisional application of the application filed on July 31, 2023, with application number 202310954040.9 and invention title "A Fresh Air Module and Air Duct Machine". Technical Field

[0002] This application relates to, but is not limited to, the field of air conditioning technology, specifically referring to a fresh air module and duct unit. Background Technology

[0003] In related technologies, when inspecting the impeller or motor of a fresh air module, the entire volute must first be disassembled. Due to the large size of the volute, disassembly and assembly are inconvenient, making the maintenance of the fresh air module difficult. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a fresh air module and a duct air conditioner that can reduce the maintenance difficulty of the fresh air module.

[0005] To address this, this application provides a fresh air module, comprising: a housing having a first inspection port; an inspection cover detachably covering the first inspection port; a volute having an axial end with an installation opening facing the first inspection port, and the volute also having an air inlet channel; a guide ring disposed at the installation opening and having an air inlet communicating with the installation opening; the guide ring being detachably connected to the volute and capable of entering and exiting the housing through the first inspection port; the air inlet channel being located radially outside the installation opening and communicating with the air inlet; and a filter assembly including a mounting frame and a filter mounted on the mounting frame, the filter being located between the air inlet channel and the air inlet, and the air inlet channel including a first air passage and a second air passage, the second air passage communicating with the air inlet.

[0006] In this embodiment, the guide ring and volute are designed as separate structures, allowing the guide ring to be detached from the volute. This means that when the impeller or motor requires maintenance, the guide ring can be separated from the volute, and then removed through the first inspection port. This ensures the impeller is not obstructed by the guide ring and is fully exposed, allowing it to be easily removed from the volute for maintenance without having to remove the entire volute. The motor, being relatively small, can also be easily removed through the first inspection port for repair.

[0007] Based on the above technical solution, the following improvements can be made to this application.

[0008] In an exemplary embodiment, the outer casing is further provided with a fresh air inlet, and the first air outlet is connected to the fresh air inlet; the volute is further provided with an air outlet, and the air outlet is connected to the air inlet.

[0009] In one exemplary embodiment, the central axis of the first air vent is horizontal, and the second air vent is inclined relative to the first air vent.

[0010] In an exemplary embodiment, the first air inlet is disposed on the side wall of the volute, which is adjacent to the side wall of the volute having the air outlet; the second air inlet is disposed on the end wall of the volute having the mounting opening, and the part of the second air inlet protrudes outward relative to the mounting opening.

[0011] In an exemplary embodiment, the access cover obscures a portion of the installation opening, and the housing includes: a shell having the first access opening and a clearance notch, the clearance notch being adjacent to and integral with the first access opening; and an end plate covering the clearance notch and obscuring another portion of the installation opening.

[0012] In one exemplary embodiment, the housing includes a front side plate, the side wall of which is provided with an exhaust port that communicates with the air outlet of the volute; the bottom wall of the front side plate is bent and extended at one end near the end plate to form an L-shaped folded edge.

[0013] In one exemplary embodiment, the end plate is movably connected to the housing.

[0014] In an exemplary embodiment, the air guide ring includes: an air guide plate fitted inside the mounting opening and surrounding the air inlet; and a mounting plate connected to the radially outer end of the air guide plate and detachably connected to the volute.

[0015] In one exemplary embodiment, the mounting plate includes a connecting cover that seals a portion of the mounting opening.

[0016] In an exemplary embodiment, the volute is provided with a first flange, which is arranged circumferentially along the mounting opening; the connecting cover plate is provided with a second flange on the plate surface facing the mounting opening, and the second flange abuts against the first flange.

[0017] In one exemplary embodiment, the housing is provided with an air passage, the air passage is connected to the fresh air inlet through the air inlet passage, the air inlet passage is connected to the air inlet through the air passage, and the filter is disposed at one end of the air passage near the air inlet; and / or, the filter is located radially outside the air inlet.

[0018] In one exemplary embodiment, the fixing frame and the guide ring are separate assembly structures.

[0019] This application embodiment also provides a ducted air conditioner, which is installed concealed in the ceiling. The ducted air conditioner includes: a ducted air conditioner body, which has a return air inlet; and a fresh air module as described in any of the above embodiments, which is located on one side of the length direction of the ducted air conditioner body and connected to the ducted air conditioner body; the ceiling has a second inspection port, which is correspondingly arranged with the return air inlet and the inspection cover plate, and the area of ​​the second inspection port is greater than the total area of ​​the return air inlet and the inspection cover plate. Attached Figure Description

[0020] Figure 1 This is a bottom view of the assembled duct unit provided in some embodiments of this application;

[0021] Figure 2 A bottom view of the structure of a ducted air handling unit provided in some embodiments of this application;

[0022] Figure 3 This is a partial three-dimensional structural schematic diagram of a fresh air module provided in some embodiments of this application;

[0023] Figure 4 for Figure 3 The diagram shown is a structural representation of the structure after removing the filter, impeller, and motor.

[0024] Figure 5 for Figure 4 Schematic diagram of the middle volute;

[0025] Figure 6 for Figure 3 Schematic diagram of the structure of the guide ring and filter screen;

[0026] Figure 7 A bottom view of the first state of the fresh air module provided in some embodiments of this application after the inspection cover is removed;

[0027] Figure 8 for Figure 7 The diagram shows the top view of the second state of the fresh air module.

[0028] Figure 9 for Figure 7 A three-dimensional structural diagram of the fresh air module in its third state is shown.

[0029] Figure 10 for Figure 9 The diagram shows a bottom view of the fresh air module.

[0030] Figure 11 for Figure 10 Schematic diagram of the cross-sectional structure along the AA direction;

[0031] Figure 12A three-dimensional structural schematic diagram of the end plate provided in some embodiments of this application;

[0032] Figure 13 for Figure 12 A bottom view of the end plate structure shown;

[0033] Figure 14 A perspective structural diagram of the front panel provided for some embodiments of this application;

[0034] Figure 15 for Figure 14 Enlarged structural diagram of section B in the middle;

[0035] Figure 16 This is a schematic diagram of the assembly of the end plate and the front side plate provided in some embodiments of this application;

[0036] Figure 17 for Figure 16 Enlarged structural diagram of section C;

[0037] Figure 18 for Figure 17 A bottom view of the structure shown;

[0038] Figure 19 A three-dimensional structural schematic diagram of the guide ring provided in some embodiments of this application;

[0039] Figure 20 A three-dimensional structural diagram of the fixing frame provided in some embodiments of this application;

[0040] Figure 21 for Figure 19 The guide coil shown is Figure 20 The diagram shows the assembly of the mounting bracket.

[0041] The attached diagram lists the components represented by each number as follows:

[0042] 100 fresh air modules;

[0043] 1. Outer shell, 11. Housing, 111. First inspection port, 112. Circumvention notch, 113. Limiting hole, 1131. Insertion hole, 1132. Anti-detachment hole, 114. Front side plate, 1141. Flanged edge, 1142. Exhaust port, 12. End plate, 121. Tongue, 1211. Connecting part, 1212. Anti-detachment part, 122. Third connecting hole, 123. Third flange, 124. Fourth flange, 13. Fresh air inlet;

[0044] 2. Inspection cover plate;

[0045] 3. Volute, 31. End cap, 311. Mounting opening, 312. First flange, 313. First buckle, 3131. First connecting hole, 314. Slot, 315. Sealing protrusion, 32. Air inlet channel, 321. First air outlet, 322. Second air outlet, 33. Air outlet, 34. Air passage.

[0046] 4. Flow guide ring, 41. Flow guide plate, 411. Air inlet, 42. Mounting plate, 421. Connecting cover plate, 4211. Second flange, 422. Side panel, 423. Second buckle, 4231. Second connecting hole, 424. Limiting protrusion, 425. Insertion hole.

[0047] 5. Filter assembly, 51. Fixing bracket, 511. Baffle, 512. Third clip, 52. Filter screen;

[0048] 6 wind turbines;

[0049] 7 motors;

[0050] 200 duct air conditioner body;

[0051] 300 suspended ceiling, 302 second access panel. Detailed Implementation

[0052] The principles and features of this application are described below with reference to the accompanying drawings. The examples given are only for explaining this application and are not intended to limit the scope of this application.

[0053] This application provides a fresh air module 100 and a ducted air handling unit. The fresh air module 100 can be used in a ducted air handling unit or in other types of air handling equipment.

[0054] like Figure 1 and Figure 2 As shown in the illustration, the ducted air conditioning unit provided in this application embodiment includes a ducted air conditioning unit body 200 and a fresh air module 100. The ducted air conditioning unit body 200 can be an indoor unit. The indoor unit can be connected to an outdoor unit. The indoor unit is concealed in the ceiling, and the outdoor unit is installed outdoors. The ducted air conditioning unit body 200 can also be an integrated unit.

[0055] The ducted air handling unit body 200 is equipped with a return air vent, which allows indoor air to enter the ducted air handling unit body 200. The ducted air handling unit body 200 is also equipped with an air outlet, which allows the air that has undergone heat exchange within the ducted air handling unit body 200 to be exhausted into the room. The ducted air handling unit body 200 is typically rectangular in shape. The air outlet of the ducted air handling unit body 200 can be located on the front side wall of the ducted air handling unit, and the return air vent of the ducted air handling unit body 200 can be located on the bottom wall of the ducted air handling unit.

[0056] like Figure 1As shown, the ducted air conditioner is concealed within the suspended ceiling 300. The side panel of the suspended ceiling 300 has air supply vents corresponding to the air outlets of the ducted air conditioner body 200; air supply grilles can be installed at these vents. The bottom plate of the suspended ceiling 300 has return air vents corresponding to the return air vents of the ducted air conditioner body 200; return air grilles can be installed at these return air vents. Furthermore, the return air vent of the suspended ceiling 300 also serves as the maintenance access port for the ducted air conditioner (referred to as the second maintenance access port 302, e.g., ...). Figure 1 As shown, this is used for maintenance of the ducted air unit during operation. During maintenance, the return air grille can be removed to expose the second maintenance port 302 for inspection and repair of the ducted air unit.

[0057] Among them, such as Figure 1 and Figure 2 As shown, the fresh air module 100 is located along the length of the duct unit body 200 (i.e., Figures 1 to 6 It is located on one side (left and right directions) and connected to the main body 200 of the air duct unit.

[0058] This design avoids increasing the depth of the duct unit (i.e., the depth to which the duct unit extends horizontally into the side wall of the ceiling 300), and allows the second inspection port 302 to form a long and narrow structure, which is more in line with the current mainstream decoration style.

[0059] In some exemplary embodiments, please refer to the following: Figure 1 and Figure 2 As shown, the second inspection port 302 is correspondingly provided with the return air inlet of the air duct unit 200 and the inspection cover plate 2 of the fresh air module 100, and the area of ​​the second inspection port 302 is greater than the total area of ​​the return air inlet of the air duct unit 200 and the inspection cover plate 2 of the fresh air module 100.

[0060] In this way, after the return air grille is removed, the air inlet of the duct unit body 200 and the inspection cover 2 can be exposed. The duct unit body 200 can be inspected by opening the bottom wall (or inspection plate) where the air inlet is located. The fresh air module 100 can be inspected by opening the inspection cover 2. Therefore, only one inspection port (i.e., the second inspection port 302) needs to be provided on the ceiling 300 to allow for the inspection of both the duct unit body 200 and the fresh air module 100. Furthermore, the second inspection port 302 can maintain a long and narrow shape, conforming to current mainstream decoration styles and facilitating product market promotion.

[0061] In related technologies, the guide ring and volute are both integrated structures. Since the diameter of the impeller is larger than the diameter of the guide ring's inlet, the entire volute usually needs to be disassembled when the impeller needs to be removed. However, due to the size limitation of the second inspection port, the volute cannot be completely removed, making impeller maintenance quite difficult.

[0062] Please refer to this as well. Figures 2 to 9As shown, the fresh air module 100 provided in this embodiment includes: a housing 1, a maintenance cover 2, a volute 3, a guide ring 4, and a filter assembly 5. The fresh air module 100 also includes a fan wheel 6 disposed within the volute 3 and a motor 7 connected to the fan wheel 6. The fan wheel 6 can be, but is not limited to, a centrifugal fan wheel.

[0063] The outer casing 1 is provided with a first inspection port 111, such as Figure 9 As shown.

[0064] Inspection cover 2 (e.g.) Figure 2 (As shown) A detachable cover is installed at the first inspection port 111.

[0065] like Figure 5 As shown, the volute 3 has a mounting opening 311 at one axial end. The mounting opening 311 faces the first inspection port 111, please refer to that as well. Figures 7 to 9 As shown. The volute 3 is also provided with an air inlet channel 32, such as... Figure 5 As shown, the air inlet channel 32 is located radially outside the mounting opening 311.

[0066] like Figure 4 As shown, the guide ring 4 is fitted onto the mounting opening 311, and forms an air inlet 411 that communicates with the mounting opening 311 and the air inlet channel 32. The guide ring 4 is detachably connected to the volute 3 and can enter and exit the outer casing 1 through the first inspection port 111.

[0067] like Figure 3 and Figure 4 As shown, the filter assembly 5 includes a mounting bracket 51 and a filter 52 mounted on the mounting bracket 51. The mounting bracket 51 is fixed to the flow guide ring 4. Please refer to the diagram for further details. Figure 3 and Figure 9 As shown, filter 52 is located radially outside air inlet 411, between air inlet channel 32 and air inlet 411, and is arranged circumferentially along guide ring 4. Filter 52 can be, but is not limited to, a HEPA filter. The height of filter 52 can be greater than the height of mounting bracket 51, such as... Figure 3 As shown, this ensures that the filter 52 can be tightly sealed against the outer casing 1, preventing air leakage between the filter 52 and the outer casing 1 and thus affecting the filtration and purification effect on the fresh air.

[0068] The outer casing 1 also has a fresh air inlet 13, such as Figure 9 As shown. The air inlet duct 32 is connected to the fresh air inlet 13. The volute 3 is also provided with an air outlet 33, as shown. Figure 5As shown. The air outlet 33 of the volute 3 is connected to the air inlet 411 of the guide ring 4. The motor 7 drives the impeller 6 to rotate, which allows fresh outdoor air to enter the air intake channel 32 through the fresh air inlet 13, be filtered by the filter screen 52, enter the air inlet 411 of the guide ring 4, and then be discharged through the air outlet 33 of the volute 3, and then be sent into the indoor environment through the air supply outlet of the ceiling 300 to realize the fresh air function.

[0069] Since the air inlet duct 32 is located radially outside the mounting opening 311, therefore, as Figure 3 As shown, after passing through the air inlet channel 32, the fresh air needs to flow to the axial outer side of the installation opening 311, and then flow to the impeller 6 through the air inlet 411 of the guide ring 4. Figure 5 As shown, the air inlet duct 32 may include a first air outlet 321 and a second air outlet 322. The first air outlet 321 is connected to the fresh air inlet 13, and the second air outlet 322 is connected to the air inlet 411 of the guide ring 4. The central axis of the first air outlet 321 can be horizontal to facilitate connection with the fresh air duct. The second air outlet 322 can be inclined relative to the first air outlet 321, such as... Figure 5 As shown, this facilitates the directing of fresh air to one axial side of the volute 3, allowing the fresh air to be filtered by the filter 52 before entering the volute 3 via the guide ring 4. To shorten the length of the air inlet channel 32 and reduce wind loss, the first air outlet 321 can be located on the side wall of the volute 3, adjacent to the side wall of the volute 3 with the air outlet 33, such as... Figure 5 As shown. The second air vent 322 can be set on the end wall of the volute 3 where the mounting opening 311 is provided, and the part where the second air vent 322 is located can protrude outward relative to the mounting opening 311, such as... Figure 5 As shown, this achieves better airflow guidance. Considering cost, the filter assembly 5 does not need to be cylindrical; it only needs to be a portion of a cylinder (such as a semi-cylindrical shape), as shown... Figure 3 As shown, it is sufficient to ensure that the airflow entering the guide ring 4 is filtered and purified.

[0070] In this embodiment, the guide ring 4 and the volute 3 are designed as separate structures, so that the guide ring 4 can be detached from the volute 3 (please refer to the following). Figure 3 and Figure 4 (As shown). In this way, when the impeller 6 or motor 7 needs maintenance, the guide ring 4 can be separated from the volute 3, and then the guide ring 4 can be removed and taken out through the first inspection port 111. This way, the impeller 6 is not obstructed by the guide ring 4 and can be fully exposed, allowing it to be removed from the volute 3 for maintenance without having to remove the entire volute 3. The motor 7, being relatively small, can also be easily removed through the first inspection port 111 for repair.

[0071] Furthermore, the mounting bracket 51 of the filter assembly 5 is fixed to the guide ring 4, such as... Figure 6As shown. Therefore, when filter 52 needs to be replaced, the inspection cover 2 can be removed, and then filter 52 can be replaced through the first inspection port 111, meeting the periodic replacement requirements of filter 52. When impeller 6 or motor 7 needs maintenance, filter assembly 5 can be removed together with guide ring 4 without affecting the maintenance of impeller 6 and motor 7.

[0072] In this way, the outer casing 1 of the fresh air module 100 only needs to be equipped with one inspection port (i.e., the first inspection port 111) to realize the inspection of the impeller 6, the motor 7 and the replacement of the filter 52, thus solving the maintenance problem of the fresh air module 100 caused by the structural limitations of the ceiling 300.

[0073] Furthermore, the filter 52 is used to filter the incoming fresh air, and the filtered fresh air then enters the impeller 6. That is, the filter 52 is located upstream of the impeller 6, rather than downstream of the impeller 6, which can reduce wind resistance and increase exhaust volume.

[0074] In some exemplary embodiments, such as Figure 8 As shown, the radius R of the inner wall of filter screen 52 is in the range of 90mm to 180mm, such as 90mm, 100mm, 120mm, 150mm, 180mm, etc. The curvature α of filter screen 52 is in the range of 60° to 270°, such as 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, etc. The thickness T (radial thickness) of filter screen 52 is in the range of 10mm to 60mm, such as 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, etc.

[0075] Thus, the size of filter 52 is appropriate, which can ensure that it has a relatively large size to play a good filtering role, while avoiding the inconvenience of removal and replacement due to its excessive size, and ensuring that filter 52 can be removed and replaced through the first inspection port 111.

[0076] Of course, the radius of the inner wall of the filter 52, the curvature of the filter 52, and the thickness of the filter 52 are not limited to the above ranges and can be adjusted as needed.

[0077] In some exemplary embodiments, such as Figure 7 , Figure 8 and Figure 9 As shown, the access cover 2 obstructs a portion of the mounting opening 311. The housing 1 includes: a housing 11 and an end plate 12.

[0078] The housing 11 is provided with a first inspection port 111 and a clearance notch 112. The clearance notch 112 is arranged adjacent to the first inspection port 111 and is connected as one unit.

[0079] Please combine them together Figure 9 , Figure 10 and Figure 11 As shown, end plate 12 covers the clearance notch 112 and blocks another part of the installation opening 311. End plate 12 is configured to press down on filter assembly 5. During normal operation of the duct air conditioner, end plate 12 can press down on filter assembly 5 to achieve a seal, preventing some airflow from passing through the space between filter assembly 5 and housing 1 without being filtered by filter screen 52, thus affecting the filtration and purification effect of fresh air.

[0080] In other words, the mounting opening 311 of the volute 3 is not completely aligned with the first inspection port 111; rather, a portion of it aligns with the first inspection port 111, while another portion aligns with the clearance notch 112. When the inspection cover 2 is removed, the mounting opening 311 of the volute 3 is not fully exposed; a portion remains within the ceiling 300, and this portion is obscured by the end plate 12 at the clearance notch 112. Because the first inspection port 111 and the ceiling 300 are not in complete contact, leaving some space, although part of the guide ring 4 and impeller 6 may be hidden within the ceiling 300, they can still be removed from the first inspection port 111 by tilting and moving them.

[0081] Furthermore, this design allows the width of the first inspection port 111 to be relatively small, which in turn allows the width of the second inspection port 302 to be relatively small. This avoids the second inspection port 302 being too wide and affecting the aesthetics of the finished decoration. Thus, it balances the aesthetics of the ceiling 300 with the maintenance issues of the fresh air module 100 caused by the structural limitations of the ceiling 300.

[0082] On the other hand, the filter assembly 5 can also be set to be relatively large, which is conducive to improving the filtration and purification effect of the filter 52 on the fresh air and ensuring the filtration and purification needs of large-volume fresh air.

[0083] Among them, the first inspection port 111 and the avoidance notch 112 are along the width direction of the second inspection port 302 (i.e. Figures 1 to 11 The arrangement is in the front-to-back direction. The area of ​​the first inspection port 111 can be larger than the area of ​​the avoidance notch 112. The central axis of the installation opening 311 can be directly aligned with the first inspection port 111, such as... Figure 7 and Figure 8 As shown. In this way, most of the guide ring 4 and the impeller 6 can face the first inspection port 111, and only a small part is hidden in the ceiling 300 facing the avoidance gap 112. This helps to reduce the difficulty of removing the guide ring 4 and the impeller 6 from the first inspection port 111, thereby reducing the difficulty of maintenance and replacement.

[0084] In some exemplary embodiments, the guide ring 4 is rotatably fitted onto the mounting opening 311, and the guide ring 4 is configured to rotate between a first position and a second position. Figure 7 and Figure 8As shown.

[0085] like Figure 7 As shown, when the flow guide ring 4 rotates to the first position, the filter assembly 5 is at least partially blocked and pressed by the end plate 12. When only part of the filter assembly 5 is blocked and pressed by the end plate 12, the other part of the filter assembly 5 can be blocked and pressed by the maintenance cover 2.

[0086] like Figure 8 As shown, based on the flow guide ring 4 rotating to the second position, the filter assembly 5 disengages from the end plate 12 and is directly facing the first inspection port 111.

[0087] Thus, when filter 52 needs to be replaced, the inspection cover 2 can be removed, the fixed connection between the guide ring 4 and the volute 3 can be released, and then the guide ring 4 can be rotated to rotate the filter assembly 5 to the position directly facing the first inspection port 111 (i.e., the second position, such as...). Figure 8 As shown), this design avoids the clamping effect of the end plate 12, which would hinder the disassembly of the filter screen 52, while also allowing the filter screen 52 to be fully exposed, thus facilitating its easy and quick removal and replacement. After the new filter screen 52 is installed on the mounting bracket 51, the guide ring 4 is rotated to reset the filter assembly 5 to the first position (as shown). Figure 7 (As shown). This makes the removal and replacement of filter 52 much more convenient.

[0088] Of course, the process of replacing filter 52 can also be carried out without rotating the guide ring 4. For example, during normal operation, one end of filter 52 is blocked by end plate 12, and the other end is blocked by inspection cover plate 2. When filter 52 needs to be replaced, after removing inspection cover plate 2, part of filter 52 will be exposed. Filter 52 can be pulled out directly by pulling on the exposed end. The new filter 52 can be inserted along the exposed end of the fixing bracket 51 and then inserted into place along the fixing bracket 51 to replace filter 52.

[0089] In some exemplary embodiments, the end plate 12 is movably connected to the housing 11 so that the end plate 12 can press against or detach from the filter assembly 5.

[0090] The end plate 12 is designed as a movable structure. When replacing the filter screen 52, the end plate 12 can be loosened (without removing the end plate 12) to release the pressure constraint of the end plate 12 on the filter screen assembly 5. This facilitates the removal of the filter screen 52 and solves the problem that the end plate 12 must both press the filter screen 52 to provide a sealing function and loosen the filter screen 52 to facilitate its removal.

[0091] The method of connection between the end plate 12 and the housing 11 is unrestricted. For example, one end of the end plate 12 away from the inspection cover 2 can be rotatably connected to the housing 11 (e.g., via a shaft, hinge, etc.), while the other end can be detachably connected to the housing 11. This allows the other end of the end plate 12 to rotate downwards, thereby releasing the constraint on the filter screen 52. Figure 9 and Figure 11 As shown; or, the end plate 12 as a whole can move up and down relative to the housing 11 to press against or detach from the filter assembly 5.

[0092] In some exemplary embodiments, the housing 11 is provided with a limiting hole 113, such as... Figure 14 As shown. The end of the end plate 12 furthest from the inspection cover plate 2 is provided with a tongue 121, as... Figure 12 and Figure 13 As shown. The tongue 121 is inserted into and confined in the limiting hole 113, and can move relative to the limiting hole 113 so that the end plate 12 can press against the filter assembly 5 or disengage from the filter assembly 5.

[0093] In this way, the end of the end plate 12 away from the inspection cover plate 2 can be inserted and engaged with the housing 11, and can move relative to the housing 11, and is not easy to detach from the housing 11, which satisfies the maintenance requirements and does not require the end plate 12 to be removed.

[0094] The number of tongues 121 can be multiple (e.g., two, three, four, or more), and the multiple tongues 121 are spaced apart. The number of limiting holes 113 can be equal to the number of tongues 121 and correspond one-to-one. In one example, such as Figure 12 and Figure 13 As shown, there are three tongues 121 and three limiting holes 113.

[0095] In some exemplary embodiments, the end plate 12 is connected to the volute 3 by fasteners.

[0096] This helps improve the stability and reliability of the end plate 12. A third connection hole 122 can be provided on the end plate 12, such as... Figure 12 and Figure 13 As shown. Fasteners pass through the third connecting hole 122 and are fixedly connected to the housing 11. The third connecting hole 122 can be located on the side of the end plate 12 near the inspection cover 2. In this way, after the fasteners are removed, the end of the end plate 12 near the inspection cover 2 can be rotated downwards and opened under the action of gravity (as shown). Figure 9 and Figure 11 As shown), the clamping constraint on filter 52 is released.

[0097] A third flange 123 can be provided at the end of the end plate 12 near the inspection cover plate 2, such as Figure 12 As shown, the third flange 123 can be covered by the inspection cover 2.

[0098] In some exemplary embodiments, the tongue 121 includes an insertion portion 1211 connected to the end plate 12 and an anti-dislodgement portion 1212 connected to the insertion portion 1211, such as... Figure 13 and Figure 17 As shown. The limiting hole 113 includes an insertion hole 1131 and an anti-dislodgement hole 1132 communicating with the insertion hole 1131, as shown. Figure 15 and Figure 17 As shown.

[0099] The insertion hole 1131 is configured to allow the anti-detachment part 1212 and the insertion part 1211 to pass through. The anti-detachment hole 1132 is configured to allow the insertion part 1211 to pass through and restrict the passage of the anti-detachment part 1212, so as to restrict the tongue 121 from dislodging from the limiting hole 113.

[0100] The area of ​​the insertion hole 1131 is larger than the area of ​​the anti-detachment hole 1132. The width of the insertion part 1211 is smaller than the width of the anti-detachment part 1212. The width of the insertion part 1211 is smaller than the width of the anti-detachment hole 1132, and the width of the anti-detachment part 1212 is smaller than the width of the insertion hole 1131. Therefore, the insertion part 1211 can pass through both the insertion hole 1131 and the anti-detachment hole 1132. However, the anti-detachment part 1212 can only pass through the insertion hole 1131, but not through the anti-detachment hole 1132. The widths of the insertion part 1211, the anti-detachment part 1212, the anti-detachment hole 1132, and the insertion hole 1131 all refer to... Figures 12 to 18 Width in the left and right directions.

[0101] Thus, when assembling the tongue 121 with the limiting hole 113, first insert the tongue 121 into the insertion hole 1131, and then move the tongue 121 towards the anti-dislodgement hole 1132 to align the end plate 12 with the housing 11. Figure 16 As shown. At this time, the anti-detachment part 1212 is restricted by the anti-detachment hole 1132 and cannot pass through the anti-detachment hole 1132 to detach, thus achieving the limiting function.

[0102] In some embodiments, after assembly, the anti-dislodgement hole 1132 is located below the insertion hole 1131. Please assemble together. Figure 16 and Figure 17 It can be seen that the tongue 121 can automatically fall under the action of gravity, so that the insertion part 1211 enters the anti-dislodgement hole 1132, preventing the end plate 12 from being pulled out horizontally.

[0103] In some embodiments, housing 11 includes a front side panel 114, such as Figures 14 to 16 As shown. The side wall of the front panel 114 is provided with an exhaust port 1142 that connects to the air outlet 33 of the volute 3, as shown. Figure 14As shown. The bottom wall of the front side panel 114 is bent and extended at one end near the end plate 12 to form an L-shaped flange 1141. A limiting hole 113 is provided at the corner of the flange 1141, as shown. Figure 14 and Figure 15 As shown. The end plate 12 near the front side plate 114 may have a fourth flange 124, such as... Figure 12 As shown. The fourth flange 124 can abut against the folded edge 1141 of the front side plate 114, so that the end plate 12 is flush with the front side plate 114. The tongue 121 is provided on the fourth flange 124. After the tongue 121 is inserted into the limiting hole 113, it will be restricted by the bottom wall of the front side plate 114 and cannot be disengaged from the front side plate 114 in the vertical direction.

[0104] In some embodiments, the insertion portion 1211 is connected to the anti-detachment portion 1212 to form an L-shaped structure, such as... Figure 13 and Figure 17 As shown. The center line of the anti-detachment hole 1132 is horizontally offset from the center line of the insertion hole 1131 (e.g., Figure 15 As shown), after the insertion part 1211 is inserted into the anti-dislodgement hole 1132, the anti-dislodgement part 1212 and the insertion hole 1131 are at least partially offset in the horizontal direction, such as... Figure 18 As shown. In this way, even if the insertion part 1211 enters the insertion hole 1131 in the vertical direction, the anti-detachment part 1212 cannot pass through the insertion hole 1131. The end plate 12 must first move horizontally to one side to align the anti-detachment part 1212 with the insertion hole 1131 before the anti-detachment part 1212 can be pulled out of the insertion hole 1131 in the opposite direction.

[0105] In this way, the cooperation between the tongue 121 and the limiting hole 113 can play a good limiting role for the end plate 12, which helps to prevent the end plate 12 from detaching from the front side plate 114 during maintenance and replacement.

[0106] In some exemplary embodiments, the guide ring 4 includes: a guide plate 41 and a mounting plate 42, such as Figure 6 As shown.

[0107] The guide plate 41 is fitted inside the installation opening 311 and surrounds the air inlet 411. The air inlet 411 can be roughly flared to guide the airflow into the impeller 6.

[0108] Mounting plate 42 is connected to the radial outer end of guide plate 41 and is detachably connected to volute 3. Fixing bracket 51 is fixed to mounting plate 42.

[0109] In some exemplary embodiments, the mounting plate 42 includes: a connecting cover plate 421 and a side panel 422, such as Figure 11 As shown.

[0110] The connecting cover plate 421 is connected to the radial outer end of the guide plate 41 and covers a portion of the mounting opening 311. In this way, the size of the mounting opening 311 can be set relatively large, which facilitates the disassembly of the impeller 6 and the motor 7.

[0111] The side panel 422 is connected to the radial outer end of the connecting cover plate 421 and is fitted on the radial outer side of the mounting opening 311; and the side panel 422 is detachably connected to the volute 3, and the fixing bracket 51 is fixed to the connecting cover plate 421 and / or the side panel 422.

[0112] The side panel 422 can act as a windbreak to prevent air leakage at the gap between the guide ring 4 and the volute 3.

[0113] In some exemplary embodiments, the volute 3 is provided with a first flange 312, such as... Figure 5 and Figure 11 As shown. The first flange 312 is arranged circumferentially along the mounting opening 311. The connecting cover plate 421 has a second flange 4211 on the plate surface facing the mounting opening 311, and the second flange 4211 abuts against the first flange 312, as shown. Figure 11 As shown.

[0114] The cooperation between the first flange 312 and the second flange 4211 can also serve as a windbreak, which helps to prevent air leakage at the gap between the guide ring 4 and the volute 3.

[0115] In some exemplary embodiments, the first flange 312 protrudes from the mounting opening 311 in a direction close to the connecting cover plate 421, such as... Figure 5 As shown. The second flange 4211 abuts against the first flange 312 along the axial direction of the volute 3, as... Figure 11 As shown.

[0116] The side panel 422 is fitted onto the outside of the first flange 312 and has a clearance fit with the first flange 312, such as Figure 11 As shown. This facilitates the rotation of the guide ring 4 relative to the volute 3.

[0117] In some exemplary embodiments, the volute 3 is provided with an end cap 31, such as... Figure 5 As shown. The end cap 31 has an installation opening 311. The end cap 31 has a first connecting part, and the guide ring 4 has a second connecting part. The guide ring 4 and the end cap 31 are connected through the first connecting part and the second connecting part.

[0118] The specific forms of the first and second connecting parts are not limited, and may include, but are not limited to: snap-fit ​​structure, fastener connection structure, plug-in structure, etc.

[0119] In some exemplary embodiments, the first connecting portion includes a plurality of spaced-apart first latches 313, such as... Figure 5As shown. The first buckle 313 and the end cap 31 together form a slot 314, as... Figure 5 As shown. The second connecting part includes a plurality of second latches 423, such as Figure 6 As shown. The second latch 423 is configured to rotate in and out of the slot 314 along the circumference of the guide ring 4.

[0120] The first buckle 313 and the second buckle 423 work together to secure the device and facilitate the rotation of the guide ring 4 relative to the volute 3.

[0121] The first latch 313 can be roughly L-shaped, and the second latch 423 can be roughly block-shaped. There can be multiple first latches 313 (e.g., two, three, four, or more), with these multiple first latches 313 spaced apart circumferentially along the guide ring 4. The number of second latches 423 can be equal to and correspond one-to-one with the number of first latches 313.

[0122] In some exemplary embodiments, at least one first latch 313 is fixedly connected to a corresponding second latch 423 by fasteners.

[0123] This improves the connection reliability between the guide ring 4 and the volute 3, and effectively prevents the guide ring 4 from becoming loose.

[0124] In one example, one of the first latches 313 is provided with a first connecting hole 3131, such as Figure 5 As shown. The corresponding second buckle 423 is provided with a second connecting hole 4231, as shown. Figure 6 As shown. Fasteners are inserted through the first connecting hole 3131 and the second connecting hole 4231 to fix the guide ring 4 to the volute 3.

[0125] In some exemplary embodiments, the card slot 314 is closed at one end along the circumference of the guide ring 4, such as... Figure 5 As shown, this is to limit the rotation amplitude of the guide ring 4 relative to the volute 3.

[0126] Since one end of the slot 314 is closed, the second latch 423 can only enter and exit from the other end of the slot 314, and can only rotate to the closed end of the adjacent slot 314 at most. Therefore, the rotation range of the guide ring 4 is determined by the distance between two adjacent slots 314. This provides a better positioning effect for the rotation of the guide ring 4. When the guide ring 4 rotates from the first position to the second position, the second latch 423 disengages from the slot 314 and rotates until it abuts against the adjacent first latch 313, indicating that the guide ring 4 has rotated to the second position. Conversely, when the guide ring 4 rotates from the second position to the first position, the second latch 423 rotates in the opposite direction until it enters the slot 314 and abuts against the adjacent first latch 313, indicating that the guide ring 4 has rotated to the first position. This eliminates the need for manual positioning, further reducing the maintenance difficulty and workload of the fresh air module 100.

[0127] In one example, there are three first clips 313 and three second clips 423. The rotation range of the guide ring 4 is approximately 120°, which can effectively ensure that the filter assembly 5 can rotate to the position facing the first inspection clip.

[0128] In some exemplary embodiments, at least one second latch 423 is interference-fitted with a corresponding slot 314. The interference fit provides good fixation and helps prevent the guide ring 4 from loosening.

[0129] In some exemplary embodiments, the fixing frame 51 extends circumferentially along the guide ring 4, and baffles 511 are provided at both ends of the fixing frame 51 in the circumferential direction, such as... Figure 6 As shown.

[0130] The volute 3 is provided with a sealing protrusion 315, such as Figure 5 As shown. The baffle 511, sealing protrusion 315, outer casing 1, and inspection cover 2 together enclose an air passage 34, as... Figure 9 As shown. The air passage 34 is connected to the fresh air inlet 13 through the air intake passage 34. The air intake passage 32 is connected to the air inlet 411 through the air passage 34. The filter 52 is located at the end of the air passage 34 near the air inlet 411.

[0131] This helps ensure that as much of the fresh air output from the air intake channel 32 as possible passes through the filter 52 and enters the impeller 6, preventing air leakage that could affect the filtration and purification effect of the fresh air.

[0132] In some exemplary embodiments, the baffle 511 is configured to abut against the filter 52, such as... Figure 3 As shown. To prevent the filter screen 52 from detaching from the fixing frame 51. The baffle 511 extends radially along the guide ring 4, with the inner radial end of the baffle 511 arranged to abut against the middle of the end face of the filter screen 52, and the outer radial end of the baffle 511 arranged to abut against the sealing protrusion 315.

[0133] In some exemplary embodiments, the fixing frame 51 and the guide ring 4 are an integral structure, such as... Figure 6 As shown. This eliminates the assembly process of the fixing frame 51 and helps improve the connection reliability between the fixing frame 51 and the guide ring 4.

[0134] In other exemplary embodiments, please refer to... Figures 19 to 21 As shown, the mounting bracket 51 and the guide ring 4 are separate assembly structures. This facilitates the rational design of the structure of the guide ring 4 and the mounting bracket 51 according to needs, and also facilitates the replacement of the mounting bracket 51 or the guide ring 4 as needed.

[0135] In some embodiments, the guide ring 4 is provided with a limiting protrusion 424 and an insertion hole 425, such as Figure 19 As shown. The fixing bracket 51 is provided with a third buckle 512, as... Figure 20 As shown. The third buckle 512 is configured to pass through the insertion hole 425 and hook onto the end face of the limiting protrusion 424, as shown. Figure 21 As shown, this is to prevent the fixing bracket 51 from detaching from the guide ring 4.

[0136] During installation, simply align the third clip 512 with the insertion hole 425 and insert it until the third clip 512 hooks onto the limiting protrusion 424. This completes the assembly and fixation of the mounting bracket 51 and the guide ring 4, which is very convenient. The third clip 512 can be equipped with a guide slope to guide the insertion of the third clip 512 into the insertion hole 425.

[0137] The number of third latches 512 can be multiple (e.g., two, three, four, or more), and these multiple third latches 512 can be spaced apart circumferentially along the fixing frame 51. The number of limiting protrusions 424 and insertion holes 425 can be equal to the number of third latches 512 and correspond one-to-one. The limiting protrusions 424 and the second latches 423 are offset circumferentially from each other in the guide ring 4, such as... Figure 21 As shown.

[0138] In one example, there are three third latches 512, three limiting protrusions 424, and three insertion holes 425. Figures 19 to 21 As shown.

[0139] In summary, the fresh air module and duct air conditioner provided in this application embodiment solve the maintenance problem of fresh air module caused by the limitations of ceiling structure, while also taking into account the aesthetics of the ceiling.

[0140] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are 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 a limitation of this application.

[0141] 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.

[0142] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0143] 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 is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply 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 that the first feature is at a lower horizontal level than the second feature.

[0144] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0145] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A fresh air module, characterized in that, include: The outer casing is provided with a first inspection port; An inspection cover is detachably installed over the first inspection port; The volute has an axial end with an installation opening facing the first inspection port, and the volute also has an air inlet channel. A guide ring is provided at the mounting opening and has an air inlet communicating with the mounting opening; the guide ring is detachably connected to the volute and can enter and exit the outer casing through the first inspection port; the air inlet channel is located radially outside the mounting opening and communicates with the air inlet. and A filter assembly includes a mounting frame and a filter installed on the mounting frame. The filter is located between the air inlet channel and the air inlet. The air inlet channel includes a first air outlet and a second air outlet, and the second air outlet communicates with the air inlet. The outer casing also includes a fresh air inlet, with the first air vent connected to the fresh air inlet; the volute also includes an air outlet, which is connected to the air inlet; the central axis of the first air vent is horizontal, and the second air vent is inclined relative to the first air vent; the first air vent is located on the side wall of the volute, adjacent to the side wall of the volute with the air outlet; the second air vent is located on the end wall of the volute with the mounting opening, and the location of the second air vent is relative to... The installation opening protrudes outward; the inspection cover plate covers a portion of the installation opening; the outer shell includes: a housing, the housing having the first inspection opening and a clearance notch, the clearance notch being adjacent to and integral with the first inspection opening; the housing including a front side plate, the side wall of the front side plate having an exhaust port communicating with the air outlet of the volute; the outer shell having an air passage, the air inlet passage communicating with the air inlet through the air passage, and the filter screen being located at one end of the air passage near the air inlet.

2. The fresh air module according to claim 1, characterized in that, The housing also includes an end plate, which covers the clearance notch and obscures another part of the mounting opening.

3. The fresh air module according to claim 2, characterized in that, The bottom wall of the front side plate is bent and extended at one end near the end plate to form an L-shaped fold.

4. The fresh air module according to claim 2, characterized in that, The end plate is detachably connected to the housing.

5. The fresh air module according to any one of claims 1 to 4, characterized in that, The guide ring includes: A baffle plate is fitted inside the mounting opening and surrounds the air inlet; and The mounting plate is connected to the radial outer end of the guide plate and is detachably connected to the volute.

6. The fresh air module according to claim 5, characterized in that, The mounting plate includes: a connecting cover plate and a side panel; The connecting cover is connected to the radial outer end of the guide plate and covers a portion of the mounting opening.

7. The fresh air module according to claim 6, characterized in that, The volute is provided with a first flange, which is arranged circumferentially along the mounting opening; The connecting cover plate has a second flange on the surface facing the mounting opening, and the second flange abuts against the first flange.

8. The fresh air module according to any one of claims 1 to 4, characterized in that, The air duct is connected to the fresh air inlet via the air inlet duct; and / or The filter is located radially outside the air inlet.

9. The fresh air module according to any one of claims 1 to 4, characterized in that, The fixing frame and the guide ring are separate assembly structures.

10. A ducted air conditioning unit, concealed within a suspended ceiling, characterized in that, The duct unit includes: The ducted air handling unit body, wherein the ducted air handling unit body is provided with a return air vent; and The fresh air module as described in any one of claims 1 to 9 is located on one side of the length direction of the duct unit body and is connected to the duct unit body; the ceiling is provided with a second inspection port, the second inspection port is correspondingly arranged with the return air inlet and the inspection cover plate, and the area of ​​the second inspection port is greater than the total area of ​​the return air inlet and the inspection cover plate.

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