A shell assembly for a fresh air module, a fresh air module and an air handling device

Abstract

The application relates to the air conditioning technical field, and discloses a shell assembly for a fresh air module, the fresh air module and an air treatment device. The shell assembly for the fresh air module comprises a shell, the bottom plate of the shell comprises a plurality of sub-bottom plates which are sequentially detachably connected, and the plurality of sub-bottom plates comprise a linkage bottom plate; a magnetic switch is arranged on the linkage bottom plate, and the magnetic switch is electrically connected with a fan of the fresh air module; wherein the magnetic switch is configured to control the fan of the fresh air module to stop working when the linkage bottom plate is removed. When the linkage bottom plate is removed, the magnetic switch arranged on the linkage bottom plate is triggered, so that the magnetic switch can control the fan to stop working, thereby realizing automatic power-off, avoiding injury to the operation and maintenance personnel, and protecting the life safety of the operation and maintenance personnel.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, such as a housing assembly for a fresh air module, a fresh air module, and an air handling device. Background Technology

[0002] Currently, with the improvement of people's living standards, improving indoor air quality has become an important demand. Traditional ventilation systems typically rely on natural ventilation or simple mechanical ventilation, but these methods are often unable to effectively filter pollutants in the air, such as dust, pollen, bacteria, and harmful gases. In recent years, fresh air modules have gradually gained attention as a solution that can effectively improve indoor air quality. Fresh air modules introduce fresh outdoor air and filter out pollutants while simultaneously expelling stale indoor air, thereby maintaining fresh and healthy indoor air.

[0003] In related technologies, the base plate or outer shell of the fresh air module is generally equipped with an inspection port, so that maintenance personnel can inspect the internal structure of the fresh air module through the inspection port.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] In related technologies, when inspecting a fresh air module, it is necessary to manually disconnect the power supply to the internal fan. However, if maintenance personnel forget to turn off the power due to negligence, there is a risk of electric shock, which may affect the safety of maintenance personnel.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides a housing assembly, a fresh air module, and an air handling device for a fresh air module to ensure the safety of maintenance personnel during maintenance.

[0009] This disclosure provides a housing assembly for a fresh air module. The housing assembly includes: a housing, a base plate of the housing including a plurality of sub-base plates that are detachably connected in sequence, the plurality of sub-base plates including a linkage base plate; and a magnetic switch disposed on the linkage base plate, the magnetic switch being adapted to be electrically connected to the fan of the fresh air module; wherein the magnetic switch is configured to control the fan of the fresh air module to stop working when the linkage base plate is removed.

[0010] This disclosure also provides a fresh air module, which includes a housing assembly for the fresh air module as described in any of the above embodiments.

[0011] This disclosure also provides an air handling device, including a fresh air module as described in any of the above embodiments.

[0012] The housing assembly, fresh air module, and air handling device for a fresh air module provided in this disclosure can achieve the following technical effects:

[0013] In this embodiment, the base plate of the housing includes multiple detachable sub-base plates, each of which can be independently disassembled to facilitate the inspection and replacement of components inside the fresh air module. Among the multiple sub-base plates is a linkage base plate. When the linkage base plate is removed, a magnetic switch located on the linkage base plate is triggered. This magnetic switch controls the fan to stop operating, thereby automatically cutting off power and preventing injury to maintenance personnel, thus protecting their lives.

[0014] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0015] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0016] Figure 1 This is a schematic diagram of the structure of a fresh air module provided in an embodiment of this disclosure from one perspective;

[0017] Figure 2 This is a partial structural schematic diagram of a fresh air module provided in an embodiment of this disclosure;

[0018] Figure 3 This is a partial structural schematic diagram of another fresh air module provided in an embodiment of this disclosure;

[0019] Figure 4 This is a partial structural schematic diagram of another fresh air module provided in an embodiment of this disclosure;

[0020] Figure 5 This is a partial structural schematic diagram of another fresh air module provided in an embodiment of this disclosure;

[0021] Figure 6 This is a partial structural schematic diagram of another fresh air module provided in an embodiment of this disclosure;

[0022] Figure 7 This is a schematic diagram of the structure of a volute provided in an embodiment of this disclosure from one perspective;

[0023] Figure 8 This is a structural schematic diagram of a volute provided in an embodiment of this disclosure from another perspective;

[0024] Figure 9 This is a partial structural schematic diagram of another fresh air module provided in an embodiment of this disclosure;

[0025] Figure 10 This is a schematic diagram of the assembly of an air duct and a fan filter provided in an embodiment of this disclosure;

[0026] Figure 11 This is a schematic diagram of the structure of a fan filter provided in an embodiment of this disclosure;

[0027] Figure 12 This is a partial structural schematic diagram of a housing provided in an embodiment of this disclosure;

[0028] Figure 13 This is a partial exploded structural diagram of a housing provided in an embodiment of this disclosure;

[0029] Figure 14 This is a schematic diagram of the structure of a return air panel assembly provided in an embodiment of this disclosure;

[0030] Figure 15 This is an exploded structural diagram of a return air panel assembly provided in an embodiment of this disclosure;

[0031] Figure 16 This is a schematic diagram of the structure of a return air filter assembly provided in an embodiment of this disclosure;

[0032] Figure 17 This is a schematic diagram of the structure of a return air plate provided in an embodiment of this disclosure;

[0033] Figure 18 This is a structural schematic diagram of a fresh air module provided in an embodiment of this disclosure from another perspective;

[0034] Figure 19 This is a partial structural schematic diagram of another housing provided in an embodiment of this disclosure;

[0035] Figure 20This is a schematic diagram of the assembly structure of an air intake ring and an impeller provided in an embodiment of this disclosure;

[0036] Figure 21 This is a schematic diagram of the structure of an impeller provided in an embodiment of this disclosure;

[0037] Figure 22 yes Figure 21 A magnified structural diagram of part A in the middle;

[0038] Figure 23 This is a schematic diagram of the mating structure of an air intake ring and a volute provided in an embodiment of this disclosure.

[0039] Figure label:

[0040] 10. Volute; 101. Main body plate; 102. First enclosure plate; 103. Second enclosure plate; 104. Connecting end plate; 105. First side plate; 11. Fresh air duct; 111. Fresh air inlet; 112. Fresh air baffle; 113. First drive mechanism; 114. Mounting slot; 12. Exhaust air duct; 121. Exhaust baffle; 122. Second drive mechanism; 123. Sterilization tank; 124. Volute tongue; 125. Limiting part; 126. Guide surface; 13. Fan inlet; 14. Indoor air outlet; 141. First air outlet; 142. Second air outlet; 143. 144. Wind baffle; 15. Third drive mechanism; 16. Switching port; 17. Switching plate; 18. Fifth drive mechanism; 19. Slot; 20. Fan filter; 21. First end of fan filter; 22. Second end of fan filter; 23. Buckle; 24. Sliding edge; 25. Filter frame; 251. Snap-fit ​​device; 26. Primary filter; 27. High-efficiency filter; 30. Air guide ring; 31. Slider; 32. Ventilation port; 33. Filtration space; 331. Air guide ring body; 332. Fixed bracket; 34. Protruding edge; 35. Sliding groove; 3 51. Inner edge of the air intake ring; 40. Housing; 41. Base plate; 42. Return air plate; 421. Return air inlet; 422. Return air baffle; 423. Fourth drive mechanism; 424. Second flange; 425. Hook; 43. Return air filter assembly; 431. Insertion protrusion; 432. Limiting guide post; 433. Insertion interface; 434. Limiting buckle; 435. Air inlet grille; 436. Return air filter frame; 437. First buckle; 438. Second buckle; 44. First maintenance plate; 441. Connecting buckle; 442. First flange; 45. Second maintenance plate; 451. Snap-fit 452. Hole; 453. First plate; 454. Second plate; 46. First sidewall; 461. Bending edge; 47. Second sidewall; 48. Top plate; 481. Reinforcing rib; 49. Magnetic switch; 50. Electrical control box; 51. Cable tray; 52. Sterilization device; 53. Detection device; 531. First detection device; 532. Second detection device; 54. Communication device; 541. First communication device; 542. Second communication device; 60. Impeller; 61. Fan blade; 611. Outer edge of fan blade; 62. Notch; 621. Inner edge of notch; 622. Outer edge of notch. Detailed Implementation

[0041] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0042] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for describing embodiments of this disclosure herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0043] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0044] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0045] Unless otherwise stated, the term "multiple" means two or more.

[0046] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0047] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0048] For ease of description, the following is an example of this application: Figure 1 As shown on the z-axis, the front is as follows Figure 1 As shown on the y-axis, to the left is as follows: Figure 1 As shown on the x-axis. When using this product, the top plate is connected to the ceiling or other mounting base, with the bottom plate facing downwards to facilitate indoor air return.

[0049] Combination Figures 1 to 9 As shown, this embodiment of the present disclosure provides a fresh air module, which includes a housing 40 and a volute 10, with the volute 10 located inside the housing 40. The volute 10 is an integral structure, and it is constructed with a fresh air duct 11, a fresh air inlet 111, and an exhaust air duct 12. The fresh air duct 11 and the exhaust air duct 12 are located on opposite sides of the volute 10 along its axial direction. The fresh air inlet 111 can be switched to connect with either the fresh air duct 11 or the exhaust air duct 12, and it connects to the outside.

[0050] Here, the volute 10 integrates the fresh air duct 11, fresh air inlet 111, and exhaust air duct 12 into one unit. This facilitates the installation of the volute 10 and, compared to a separate structure, eliminates the need for assembly, improving the sealing effect of each duct, preventing air leakage, reducing noise, and minimizing condensation points. The fresh air inlet 111 can be selectively connected to either the fresh air duct 11 or the exhaust air duct 12. When connected to the fresh air duct 11, outdoor fresh air enters the fresh air module through the fresh air duct 11 and then enters the room, regulating the indoor air quality. When connected to the exhaust air duct 12, the air in the fresh air module is exhausted to the outside through both the exhaust air duct 12 and the fresh air inlet 111. In other words, outdoor fresh air can flow into the room through both the fresh air inlet 111 and the exhaust air duct 12, and indoor stale air can also be exhausted to the outside through both the exhaust air duct 12 and the fresh air inlet 111. The fresh air module integrates exhaust and fresh air functions through an integrated volute 10. This not only improves the functionality of the fresh air module but also reduces the number of components, increases the compactness of the structure, facilitates installation, avoids air leakage caused by gaps in splicing, reduces air volume loss, lowers noise, and improves the user experience.

[0051] Optionally, the bottom plate 41 of the housing 40 is located below the volute 10, and the bottom plate 41 of the housing 40 covers the bottom of the fresh air duct 11. The top plate 48 of the housing 40 is located above the volute 10, and the top plate 48 of the housing 40 covers the top of the exhaust air duct 12.

[0052] Optionally, the top plate is provided with reinforcing ribs 481, which can improve the shock absorption capacity and strength of the top plate.

[0053] Optionally, the reinforcing rib 481 extends in an arc or circle shape, which can improve the seismic resistance of the top plate in the circumferential direction.

[0054] Optionally, the housing 40 is also provided with a return air vent 421, which is connected to the interior. The volute 10 is also provided with an interior air outlet 14, which is connected to the interior. The exhaust duct 12 can be connected to either the interior air outlet 14 or the fresh air inlet 111. The exhaust duct 12 can also be connected to either the fresh air duct 11 or the return air vent 421.

[0055] In this embodiment of the disclosure, the arrangement of the indoor air outlet 14 and the return air outlet 421 ensures the multifunctionality of the fresh air module. For example... Figure 4 and Figure 6 As shown, Figure 4 The middle arrow indicates the direction of fresh air flow within the fresh air duct. Figure 6 The middle arrow indicates the airflow direction within the exhaust duct when the fresh air module is running in fresh air mode. When the fresh air module is running in fresh air mode, the fresh air inlet 111, fresh air duct 11, exhaust duct 12, and indoor air outlet 14 are connected. Outdoor fresh air can flow into the room through these connections, replenishing the indoor air supply. When the fresh air module is running in internal circulation mode, the return air inlet 421, exhaust duct 12, and indoor air outlet 14 are connected. Indoor airflow can flow into the room sequentially through these connections. Figure 5 As shown, Figure 5 The middle arrow indicates the airflow direction in the exhaust duct when the exhaust mode is running. When the fresh air module is running the exhaust mode, the return air inlet 421, the exhaust duct 12 and the fresh air inlet 111 are connected, so that the indoor stale air can be discharged to the outside through the return air inlet 421, the exhaust duct 12 and the fresh air inlet 111 in sequence.

[0056] Optionally, such as Figure 4 and Figure 5 As shown, the fresh air module also includes a fresh air baffle 112 and a first drive mechanism 113. The fresh air baffle 112 is movably disposed at the fresh air inlet 111, and the fresh air baffle 112 is drivenly connected to the first drive mechanism 113. The first drive mechanism 113 is used to drive the fresh air baffle 112 to open or close the fresh air inlet 111. In this embodiment, the fresh air inlet 111 can be automatically opened and closed through the first drive mechanism 113 and the fresh air baffle 112 to realize the automatic adjustment function of the fresh air module.

[0057] Optionally, such as Figures 3 to 6As shown, the indoor air outlet 14 includes a first air outlet 141, and the fresh air module also includes an exhaust baffle 121 and a second drive mechanism 122. The exhaust baffle 121 is movably disposed in the exhaust duct 12, and the exhaust baffle 121 is drivenly connected to the second drive mechanism 122. The second drive mechanism 122 can drive the exhaust baffle 121 to move between a first position and a second position. When the exhaust baffle 121 is in the first position, the exhaust baffle 121 closes the first air outlet 141, and the exhaust duct 12 is connected to the fresh air inlet 111. When the exhaust baffle 121 is in the second position, the exhaust duct 12 is connected to the first air outlet 141.

[0058] In this embodiment, the exhaust baffle 121 is used to adjust the connection between the exhaust duct 12 and the fresh air inlet 111 or the first air outlet 141. The exhaust baffle 121 is movably disposed in the exhaust duct 12. When it is necessary to connect the exhaust duct 12 and the fresh air inlet 111, the exhaust baffle 121 moves to the first position, so that the exhaust baffle 121 can both close the first air outlet 141 and avoid the fresh air inlet 111. When it is necessary to connect the exhaust duct 12 and the first air outlet 141, the exhaust baffle 121 moves to the second position. While opening the first air outlet 141, the exhaust baffle 121 can also block the channel between the exhaust duct 12 and the fresh air inlet 111, so that the airflow in the exhaust duct 12 can flow out from the first air outlet 141. This realizes the switching of the air outlet of the exhaust duct 12, thereby ensuring the multifunctionality of the fresh air module.

[0059] Optionally, the indoor air outlet 14 also includes a second air outlet 142, and the fresh air module also includes an air outlet baffle 143 and a third drive mechanism 144. The air outlet baffle 143 is movably disposed at the second air outlet 142, and the air outlet baffle 143 is drivenly connected to the third drive mechanism 144. The third drive mechanism 144 can drive the air outlet baffle 143 to open or close the second air outlet 142.

[0060] In this embodiment, the exhaust baffle 121 is disposed within the exhaust duct 12. The size and shape of the exhaust baffle 121 are limited by the exhaust duct 12. Therefore, the first air outlet 141 matches the shape and size of the exhaust baffle 121. The second air outlet 142 further increases the air outlet area of ​​the indoor air outlet 14, thereby ensuring the indoor air volume. The second air outlet 142 can be opened and closed independently through the third drive mechanism 144 to accommodate the various air outlet modes of the fresh air module.

[0061] Optionally, the fresh air module also includes a return air baffle 422, which is movably disposed at the return air inlet 421 and driven by a fourth drive mechanism 423. The fourth drive mechanism 423 is used to drive the return air baffle 422 to open or close the return air inlet 421. Here, the arrangement of the return air baffle 422 and the fourth drive mechanism 423 at the return air inlet 421 enables the return air inlet 421 to be automatically controlled to open and close, thereby realizing the automatic adjustment of the return air inlet 421.

[0062] Optionally, the volute 10 is also configured with mounting slots for installing electrical components and / or the sterilization device 52. In this way, the volute 10 also provides mounting locations for other components, thus avoiding complex external connections and reducing maintenance costs.

[0063] Optionally, such as Figure 3 and Figure 4 As shown, the volute 10 has a mounting groove 114, and the first drive mechanism 113 is located within the mounting groove 114. The mounting groove 114 is included in the mounting slot, and the electrical component includes the first drive mechanism 113. The mounting groove 114 allows the first drive mechanism 113 to be stably mounted on the volute 10, preventing it from falling off.

[0064] Optionally, the mounting slot 114 is located below the fresh air inlet 111 to reduce the wiring of the first drive mechanism 113 and facilitate the drive connection between the first drive mechanism 113 and the fresh air baffle 112.

[0065] Optionally, such as Figure 3 As shown, the volute 10 is constructed with a sterilization tank 123, and the second drive mechanism 122 is located inside the sterilization tank 123. The mounting slot includes the sterilization tank 123, and the electrical components include the second drive mechanism 122. This also facilitates the stable setting of the second drive mechanism 122.

[0066] Optionally, the sterilization tank 123 is located below the first air outlet 141, which can reduce the wiring of the second drive mechanism 122 and facilitate the cooperation between the second drive mechanism 122 and the exhaust baffle 121. Optionally, the first air outlet 141 and the second air outlet 142 are located on the same side wall of the volute 10.

[0067] Optionally, the third drive mechanism 144 is located within the sterilization tank 123. This eliminates the need for a separate mounting slot for the third drive mechanism 144 and also improves the stability of its installation.

[0068] Optionally, the sterilization tank 123 is located below the first air outlet 141 and the second air outlet 142, so that the second drive mechanism 122 and the third drive mechanism 144 can be respectively set to correspond to the first air outlet 141 and the second air outlet 142, reducing wiring.

[0069] Optionally, such as Figure 3 As shown, the fresh air module also includes a sterilization device 52, which is located within the sterilization tank 123. This allows the sterilization device 52 to sterilize the airflow exiting the indoor air outlet 14, improving air quality. The sterilization tank 123 not only accommodates the second drive mechanism 122 and the third drive mechanism 144, but also the sterilization device 52, increasing the integration of the volute 10 and providing mounting positions and stability for the various components of the fresh air module.

[0070] Optionally, the outer wall portion of the sterilization tank 123 protrudes outward to form a sterilization space, and the sterilization device 52 is located within the sterilization space.

[0071] Optionally, the sterilization tank 123 is equipped with a wiring board with wiring holes. The wiring of the second drive mechanism 122, the third drive mechanism 144 and the sterilization device 52 is restricted through the wiring holes, which can prevent the wiring from getting tangled and facilitate maintenance.

[0072] Optionally, the sterilization device 52 includes a bipolar sterilization device.

[0073] Optionally, such as Figure 3 and Figure 4 As shown, the fresh air module also includes an electrical control box 50, which is located on the outside of the volute 10 and on the same side wall as the fresh air inlet 111. The volute 10 is also equipped with a wiring trough 51, and the wiring led out from the electrical control box 50 is located in the wiring trough 51 and is electrically connected to the electrical components through the wiring trough 51.

[0074] In this embodiment, the electrical control box 50 is used to house the control components of the fresh air module. The wires leading out from the electrical control box 50 can be connected to the fan, multiple drive mechanisms, and the sterilization device 52 to ensure the normal operation of the fresh air module. The wiring trough 51 is provided to make the wiring in the electrical control box 50 smoother and avoid the circuit being exposed on the outside.

[0075] Optionally, such as Figures 4 to 6 As shown, the volute 10 has a switching port 15 located between the inlet of the fresh air duct 11 and the fresh air inlet 111. The volute 10 also includes a switching plate 151, which is movably disposed at the switching port 15. The switching plate 151 is drivenly connected to the fifth drive mechanism 152. The fifth drive mechanism 152 can drive the switching plate 151 to open or close the switching port 15. When the switching plate 151 closes the switching port 15, the fresh air inlet 111 is connected to the exhaust duct 12, and the fresh air inlet 111 is disconnected from the fresh air duct 11. When the switching plate 151 opens the switching port 15, the fresh air inlet 111 is connected to the fresh air duct 11, and the fresh air inlet 111 is disconnected from the exhaust duct 12. The fifth drive mechanism 152 is disposed in the volute 10.

[0076] In this embodiment, the fresh air duct 11 and the exhaust air duct 12 share a fresh air inlet 111. Therefore, the fresh air inlet 111 can serve as both an air inlet and an air outlet. The volute 10 integrates the fresh air duct 11 and the exhaust air duct 12. A switching port 15 is provided in the volute 10. The switching port 15 is connected to a switching plate 151 and a fifth drive mechanism 152, allowing the switching port 15 to open or close. When the switching port 15 is open, the switching plate 151 can cut off the channel between the exhaust air duct 12 and the fresh air inlet 111, allowing the fresh air inlet 111 to connect with the fresh air duct 11. When the switching port 15 is closed, the fresh air duct 11 and the fresh air inlet 111 are isolated, allowing the fresh air inlet 111 to connect with the exhaust air duct 12. The switching port 15, the switching plate 151, and the fifth drive mechanism 152 enable the switching between the fresh air mode and the exhaust air mode of the fresh air module.

[0077] Optionally, such as Figure 3 As shown, the fifth drive mechanism 152 is disposed on the volute 10. Optionally, the fifth drive mechanism 152 is detachably disposed on the side wall of the volute 10.

[0078] Optionally, the outer wall of the volute 10 is provided with a wiring clip, and the wiring led out from the electrical control box 50 is located in the wiring clip. The wiring clip can restrain the wiring, prevent the wiring from being exposed, improve safety, and facilitate installation and maintenance.

[0079] Optionally, the switching plate 151 is rotatably disposed at the switching port 15, wherein one end of the switching plate 151 is rotatably connected to the end of the switching port 15 away from the fresh air inlet 111, and the other end of the switching plate 151 can move around one end of the switching plate 151.

[0080] Optionally, when the switching plate 151 closes the switching port 15, the other end of the switching plate 151 abuts against the end of the switching port 15 near the fresh air inlet 111 to close the switching port 15. When the switching port 15 is open, the other end of the switching plate 151 abuts against the top plate 48 of the housing 40, thus isolating the exhaust duct 12 and the fresh air inlet 111.

[0081] Optionally, such as Figure 7 and Figure 8As shown, the volute 10 has a fan inlet 13. The volute 10 includes a main body plate 101, which has the fan inlet 13. A fresh air duct 11 is located below the main body plate 101, and an exhaust air duct 12 is located above the main body plate 101. The fresh air duct 11 and the exhaust air duct 12 are connected through the fan inlet 13. Similarly, the return air inlet 421 is also connected to the exhaust air duct 12 through the fan inlet 13. The volute 10 also includes a first enclosure plate 102 and a second enclosure plate 103. The first enclosure plate 102 is located below the main body plate 101 and extends circumferentially along the fan inlet 13. The first enclosure plate 102 and the main body plate 101 enclose the fresh air duct 11. The second enclosure 103 is located above the main body 101. The second enclosure 103 extends circumferentially along the fan inlet 13 and encloses the exhaust duct 12 with the main body 101.

[0082] Optionally, the fresh air module also includes an impeller 60, which is located inside the volute 10 and is used to drive the airflow of the fresh air module. Optionally, the impeller 60 is located inside the exhaust duct 12. When the impeller 60 rotates, it can drive the airflow flowing in from the fan inlet 13 into the exhaust duct 12, and then from the exhaust duct 12 to the fresh air inlet 111 or the indoor air outlet 14.

[0083] Optionally, along the flow direction of fresh air in the fresh air duct, at least part of the distance between the first enclosure 102 and the fan inlet gradually decreases, which can increase the speed and flow resistance of the fresh air so that the fresh air can flow more completely to the fan inlet.

[0084] Optionally, along the airflow direction within the exhaust duct 12, the distance between at least the second enclosure 103 and the fan inlet 13 gradually increases, thereby increasing the airflow volume of the exhaust duct 12. Optionally, the second enclosure 103 has a smooth arc shape to reduce wind resistance and increase the airflow volume.

[0085] Optionally, the volute 10 also includes a first side plate 105, which extends above the main body plate 101. The first side plate 105 has an indoor air outlet 14, which corresponds to the exhaust duct. When the exhaust duct is connected to the indoor air outlet 14, the airflow in the exhaust duct 12 can flow to the indoor air outlet 14 as quickly as possible, reducing the flow path and air volume loss.

[0086] Optionally, the end of the second enclosure 103 is provided with a volute tongue 124, which is used to cooperate with the impeller 60 for air outlet.

[0087] Optionally, the exhaust baffle 121 and the volute tongue 124 are correspondingly arranged. One end of the exhaust baffle 121 is rotatably connected to the first side baffle, and the other end of the exhaust baffle 121 can rotate around one end of the exhaust baffle 121. When the exhaust baffle 121 is in the second position, the exhaust baffle 121 and the end of the volute tongue 124 away from the impeller 60 abut against each other. In this way, the exhaust baffle 121 can isolate the connection between the exhaust baffle 121 and the fresh air inlet 111, so that the exhaust duct 12 can be connected to the first air outlet 141.

[0088] Optionally, the end of the volute tongue 124 away from the impeller 60 is provided with a limiting part 125. When the exhaust baffle 121 is in the second position, the other end of the exhaust baffle 121 abuts against the limiting part 125, and the limiting part 125 can restrict the exhaust baffle 121 from continuing to rotate.

[0089] Optionally, the end of the volute tongue 124 facing away from the impeller 60 is also provided with a guide surface 126. When the exhaust baffle 121 moves toward the limiting part 125, the exhaust baffle 121 can move along the guide surface 126, so that the movement of the exhaust baffle 121 is more precise. Optionally, the guide surface 126 is inclined toward the impeller 60 in the direction close to the limiting part 125.

[0090] Optionally, the upper end of the first side plate 105 extends to the fresh air duct 11, and the lower end of the first side plate 105 is provided with a sterilization groove 123. Optionally, the fifth drive mechanism 152 is provided on the first side plate 105.

[0091] Optionally, such as Figure 8 As shown, the volute 10 also includes a connecting end plate 104, which is located on the outside of the fresh air duct 11. A connecting column 19 is constructed on the side of the connecting end plate 104 facing the exhaust air duct 12. The connecting column 19 extends along the axial direction of the volute 10. The top plate 48 is detachably connected to the connecting column 19.

[0092] In this embodiment of the present disclosure, the connecting post 19 of the connecting end plate 104 can extend downward so that the volute 10 can be connected to the top plate 48, thereby reducing the connection distance, increasing the number of connection points, and improving the connection stability.

[0093] Optionally, the volute 10 and impeller 60 are defined as a fan, such as Figures 1 to 4 , Figure 10 and Figure 11 As shown, the fresh air module also includes a fan filter 20, which is located at the fan inlet 13 and surrounds the outer edge of the fan inlet 13 to filter the airflow flowing into the fan inlet 13. Specifically, the fan filter 20 is arranged in an arc shape along the circumference of the fan inlet 13. This arc shape, with the fan filter 20 positioned at the fan inlet, allows for more efficient filtration of the airflow flowing into the exhaust duct 12.

[0094] Optionally, the fresh air duct 11 is located outside the fan filter 20, and the arc length of the fan filter 20 corresponds to the fresh air duct 11. In this way, the airflow from the fresh air duct 11 to the fan inlet 13 needs to be filtered by the fan filter 20, and then flows from the fan inlet 13 to the exhaust duct 12.

[0095] Optionally, the return air inlet 421 corresponds to the inner side of the fan filter 20, so that the airflow flowing into the return air inlet 421 can directly flow into the fan inlet 13 and then into the exhaust duct 12.

[0096] Optionally, the airflow at the first end 21 of the fan filter is greater than the airflow at the second end 22 of the fan filter; wherein, the density of the fan filter 20 is different along the direction from the first end 21 to the second end 22 of the fan filter. In this embodiment of the present disclosure, the airflow at both ends of the fan filter 20 is different, therefore, the density at both ends of the fan filter 20 is also different. By changing the density distribution of the fan filter 20, the density of the fan filter 20 is matched with the airflow, which can ensure the filtration effect of the fan filter 20 while improving the efficiency and service life of the fan filter 20.

[0097] Optionally, the density of the first end 21 of the fan filter is less than the density of the second end 22 of the fan filter; and / or, the density of the fan filter 20 gradually increases along the direction from the first end 21 to the second end 22 of the fan filter. In this embodiment of the present disclosure, the first end 21 of the fan filter has a large air intake, therefore the first end of the fan filter is a high-pressure area, and the density of the first end of the fan filter is relatively small, which can increase the effective air intake. The second end of the fan filter has a larger density and a smaller effective air intake, thus ensuring the air intake volume.

[0098] Optionally, the fan filter 20 includes a first filter segment and a second filter segment connected sequentially from a first end 21 to a second end 22 of the fan filter. The density of the first filter segment is less than the density of the second filter segment; wherein the length of the first filter segment is greater than the length of the second filter segment. In this embodiment, the density of the first filter segment is less than the density of the second filter segment, and the length of the first filter segment is relatively long. This ensures the air intake of the fan filter 20 and avoids incomplete filtration of impurities in the fresh air.

[0099] Optionally, the ratio of the length of the first filter segment to the length of the second filter segment is greater than 1 and less than or equal to 3, or the ratio of the length of the first filter segment to the length of the second filter segment is greater than 1 and less than or equal to 2.

[0100] In this embodiment, the ratio of the length of the first filter segment to the length of the second filter segment is between 1 and 3 or between 1 and 2. This optimizes the structural layout of the fan filter 20, ensuring both filtration effectiveness and ventilation efficiency and uniformity. On one hand, the extended, high-density first filter segment effectively intercepts large particles, reducing the filtration burden on the subsequent second filter segment and enhancing overall filtration efficiency. On the other hand, a reasonable segment length ratio helps balance airflow distribution, preventing localized airflow congestion or uneven filtration caused by sudden changes in filter density, thus ensuring stable operation of the ventilation system. Furthermore, this design reduces the amount of filter material used while maintaining filter performance, thereby lowering production and replacement costs.

[0101] For example, the ratio of the length of the first filter segment to the length of the second filter segment can be 1, 1.2, 1.5, 1.8, or 2, etc.

[0102] Optionally, such as Figure 10 As shown, the fresh air module also includes an air intake ring 30, which is located at the fan inlet 13 and has a ventilation opening 32. The ventilation opening 32 corresponds to and is connected to the fan inlet. The fan filter 20 is located on the air intake ring 30 and is detachably connected to the air intake ring 30.

[0103] In this embodiment, the induced draft ring 30 can introduce outside air into the impeller 60 in a more uniform and stable manner, increasing airflow and reducing noise during fan operation. The ventilation opening 32 of the induced draft ring 30 is connected to the fan inlet 13 to facilitate airflow. The fan filter 20 is detachably installed in the induced draft ring 30 for easy inspection and replacement.

[0104] Optionally, such as Figure 23As shown, the ratio of the distance D from the inner wall surface of the fan filter 20 to the center of the vent to the radius R of the vent is greater than or equal to 1 and less than or equal to 1.5, or the ratio of the distance D from the inner wall surface of the fan filter 20 to the center of the vent to the radius R of the vent is greater than or equal to 1 and less than or equal to 1.2. In this embodiment of the present disclosure, by controlling the ratio of the distance D from the inner wall surface of the fan filter 20 to the center of the vent to the radius R of the vent within a reasonable range, the airflow organization and filtration efficiency of the fresh air can be optimized. On the one hand, this ratio ensures that an appropriate distance is maintained between the fan filter 20 and the fan inlet 13, which can maintain the smooth flow of airflow and avoid the formation of eddies or local congestion due to insufficient space. On the other hand, a reasonable distance can ensure that the interception area of ​​the fan filter 20 matches the air intake requirements of the fan, so that the fan filter 20 can reduce filtration resistance while filtering efficiently, thereby reducing fan energy consumption and extending its service life. For example, the ratio of the distance D from the inner wall surface of the fan filter 20 to the center of the vent to the radius R of the vent can be 1, 1.1, 1.2, 1.3, 1.4 or 1.5, etc.

[0105] Optionally, the fan filter 20 is arc-shaped, with the arc angle 'a' ranging from 45° to 315°, or from 90° to 315°, or from 120° to 300°, or from 180° to 300°. In this embodiment, the fan filter 20 adopts an arc-shaped design, and the arc angle 'a' ranges from 45° to 315°, specifically from 90° to 135°, 120° to 300°, or 180° to 300°, which can significantly optimize the airflow path and filtration performance of the fresh air. On the one hand, the arc-shaped filter can perfectly match the circular air inlet of the fan, forming a continuous and uniform filtration interface, ensuring a smooth transition of airflow throughout the entire air inlet area, reducing dead zones and vortices caused by shape mismatch, thereby improving filtration efficiency and reducing noise. On the other hand, the appropriate selection of the curvature range ensures that the filter screen has a sufficient filtration area while avoiding increased airflow resistance due to excessive bending or reduced filtration effect due to insufficient curvature, thus achieving a balance between filtration performance and ventilation efficiency. Furthermore, a larger curvature range helps to disperse airflow impact force, reduce localized wear on the fan filter screen 20, extend the filter screen's service life, and enhance the adaptability of the fan filter screen 20 to different airflow and pressure conditions, thereby improving overall operational stability and reliability.

[0106] Optionally, such as Figure 9 As shown, one axial end of the air intake ring 30 is provided with a filter space 33, which is located on the radial side of the vent 32 and has an open end; wherein, the fan filter 20 can slide into or out of the filter space 33 through the opening.

[0107] In this embodiment, the air intake ring 30 is installed at the air inlet of the fan, and the fan filter 20 is located in the filtration space 33 constructed by the air intake ring 30. That is, the fan filter 20 is detachably installed in the air intake ring 30, allowing the fan filter 20 to be arranged in an arc shape, thereby increasing the filtration area and enabling more efficient filtration of the airflow to the fan. Furthermore, the fan filter 20 can slide into or out of the filtration space 33, facilitating its removal and improving ease of installation and removal. This prevents deformation of the fan filter 20 and ensures the service life and filtration effect of the filtration device.

[0108] Optionally, the air duct 30 includes an air duct body 331 and a fixed bracket 332. The air duct body 331 is provided with a ventilation opening 32. The fixed bracket 332 is provided on the air duct body 331 and encloses an installation space with the air duct body 331. When the fan filter 20 slides into the filtration space 33, one circumferential end of the fan filter 20 is engaged or inserted into the fixed bracket 332.

[0109] In this embodiment, the fixed bracket 332 further enhances the stability of the fan filter 20 installation, ensuring that the filter does not shift or loosen under airflow impact. At the same time, the snap-fit ​​or plug-in method provides a quick and reliable connection, improving the overall structural stability and operational reliability, and reducing equipment maintenance costs and downtime.

[0110] Optionally, such as Figures 9 to 11 As shown, the first end 21 of the fan filter screen is equipped with a buckle 23, and the first end of the fixing bracket 332 is equipped with a protruding edge 34. When the fan filter screen 20 is located in the filtration space 33, the buckle 23 and the protruding edge 34 are engaged. The protruding edge 34 is inclined towards the vent 32 in the direction away from the installation space.

[0111] In this embodiment, a snap-fit ​​23 and a protruding edge 34 are respectively provided on the fan filter 20 and the fixed bracket 332, achieving a secure connection of the fan filter 20 within the installation space. The cooperation between the snap-fit ​​23 and the protruding edge 34 not only ensures the stability of the fan filter 20 under airflow impact but also simplifies the installation and disassembly process of the filter, improving maintenance convenience. Furthermore, the protruding edge 34 is inclined towards the vent 32 in a direction away from the installation space, which helps guide airflow more smoothly through the fan filter 20, reducing uneven airflow impact on the filter, thereby reducing localized wear and extending its service life. Simultaneously, the inclined protruding edge 34 also helps optimize airflow distribution, improve filtration efficiency, ensure the uniformity and stability of the fan intake air, and further enhance the performance and reliability of the entire fresh air module.

[0112] Optionally, the second end 22 of the fan filter screen is provided with a sliding edge 24, and the second end of the fixed bracket 332 is provided with a sliding groove 35. When the fan filter screen 20 slides into the filtration space 33, the sliding edge 24 is located within the sliding groove 35. This ensures the stability and smoothness of the fan filter screen 20 during installation and sliding, preventing the fan filter screen 20 from shifting or shaking during installation or use, thereby ensuring the uniformity and reliability of the filtration effect. The cooperation between the sliding edge 24 and the sliding groove 35 can also effectively position the fan filter screen 20, ensuring that it is correctly installed in the filtration space 33, avoiding airflow leakage or reduced filtration efficiency due to improper installation. In addition, this sliding cooperation method simplifies the disassembly and assembly process of the fan filter screen 20, making maintenance and replacement more convenient, while also helping to protect the edges of the fan filter screen 20 from damage, extending its service life, and ensuring the long-term stable operation of the fresh air module.

[0113] Optionally, the fan filter 20 includes a filter frame 25 and a filter assembly, the filter assembly being detachably disposed within the filter frame 25; wherein the filter frame 25 can drive the filter assembly to slide into or out of the filtration space 33 through the opening.

[0114] In this embodiment, the filter assembly is detachably installed within the filter frame 25, making the maintenance and replacement of the fan filter 20 more convenient and efficient. The filter frame 25 not only provides a stable support structure for the filter assembly but also allows the entire filter assembly to slide into or out of the filtration space 33 of the air intake ring 30, greatly simplifying the installation and disassembly process and reducing operating time and maintenance costs. Furthermore, the filter frame 25 protects the filter assembly from mechanical damage during installation or use, ensuring the integrity and filtration performance of the filter. The detachability of the filter assembly also allows for individual filter replacement without replacing the entire fan filter 20, further reducing operating costs.

[0115] Optionally, the filter assembly includes a pre-filter 26 and a high-efficiency filter 27, which are arranged sequentially from the inside out. That is, the pre-filter 26 and the high-efficiency filter are arranged sequentially from the fresh air duct to the fan inlet.

[0116] In this embodiment, the pre-filter 26 removes large particulate impurities from the air, such as dust and hair, reducing the burden on the high-efficiency filter 27 and extending its service life. Simultaneously, the high-efficiency filter 27 further filters out fine particulate matter, such as bacteria and pollen, ensuring purer air entering the fan and improving the overall filtration efficiency and air quality of the fresh air system. Optionally, the high-efficiency filter 27 can be a HEPA filter or a high-voltage electrostatic precipitator.

[0117] Optionally, a snap-fit ​​device 251 is provided on the inner side of the filter frame 25. When the filter assembly is installed on the filter frame 25, the snap-fit ​​device 251 snaps onto the outer edge of the filter frame 25.

[0118] In this embodiment, the snap-fit ​​device 251 not only simplifies the installation and disassembly process of the filter assembly, allowing it to be completed without additional tools, but also ensures that the filter assembly will not loosen or shift due to airflow impact during use, thereby guaranteeing the stability and reliability of the filtration effect. It also improves the sealing performance of the filter assembly, reducing the possibility of unfiltered air passing through directly, thus enhancing the overall filtration efficiency. Simultaneously, the snap-fit ​​device 251 can be designed to be more compact, saving space and making the overall structure of the fan filter 20 more compact and rational, facilitating efficient filtration within a limited space.

[0119] Optionally, the air intake ring 30 is detachably connected to the volute 10, so that the air intake ring 30 and the fan filter 20 can be removed from the volute 10 as a module to facilitate the replacement and disassembly of the air intake ring 30 and the fan filter 20.

[0120] Optionally, such as Figure 9 As shown, the end face of the fan inlet 13 (that is, the lower wall of the main body plate) is provided with a slot 16, and the air guide ring 30 is provided with a slider 31. The slider 31 is adapted to the slot 16. When the air guide ring 30 rotates in the first direction, the slider 31 is inserted into the slot 16 to connect the fan and the air guide ring 30. When the air guide ring 30 rotates in the second direction, the slider 31 is disengaged from the slot 16 to separate the fan and the air guide ring 30. The first direction and the second direction are opposite.

[0121] In this embodiment, when the air-guiding ring 30 is rotated in the first direction, the slider 31 inserts into the slot 16, securely connecting the fan and the air-guiding ring 30, ensuring their stability during operation. Conversely, when the air-guiding ring 30 is rotated in the opposite second direction, the slider 31 smoothly disengages from the slot 16, facilitating disassembly. This simplifies the installation and disassembly process, avoids airflow leakage or equipment instability caused by loose connections, improves the overall reliability and maintenance efficiency of the fresh air module, and reduces maintenance costs and equipment downtime.

[0122] Optionally, such as Figure 20 and Figure 21 As shown, the impeller 60 includes a plurality of blades 61. The end of the blades 61 facing the air intake ring 30 has a notch 62. The inner edge 621 of the notch is located inside the inner edge 351 of the air intake ring, and the outer edge 622 of the notch is located outside the inner edge 351 of the air intake ring.

[0123] In this embodiment, the fan blade 61 is constructed with a notch 62. The inner edge 621 of the notch guides the airflow smoothly into the impeller 60 flow channel, while the outer edge of the notch 62 suppresses airflow stripping through the shear layer reattachment effect, thus improving aerodynamic efficiency. Furthermore, this allows for a more uniform distribution of air before it enters the impeller 60, reducing airflow turbulence and non-uniformity, decreasing the intake resistance at the induced draft ring 30, thereby improving suction energy and fan efficiency, and also reducing noise.

[0124] Optionally, the height of the lower end of the outer edge 622 of the notch is less than or equal to the height of the lowest point of the inner edge 351 of the air intake ring.

[0125] In this embodiment, when the height of the lower end of the outer edge of the notch 62 is lower than or equal to the height of the lowest point of the inner edge of the air intake ring 30, it ensures that the airflow is not unnecessarily obstructed when entering the impeller 60, allowing the airflow to enter in a shape that better conforms to the impeller 60, thereby improving the airflow transmission efficiency. This reduces airflow separation and backflow at the fan inlet, enabling the fan to achieve higher airflow output with lower energy consumption. It also improves the filtration effect of the fan filter 20, as a more uniform airflow distribution allows the filtration performance of each part of the filter to be fully utilized, extending the service life of the fan filter, reducing vibration and noise levels during fan operation, and enhancing the reliability and comfort of the fresh air module.

[0126] Optionally, the distance L1 from the highest point of the notch 62 to the lowest point of the fan blade 61 is greater than or equal to 5 mm and less than or equal to 10 mm; or, the distance L1 from the highest point of the notch 62 to the lowest point of the fan blade 61 is greater than or equal to 6 mm and less than or equal to 9 mm; or, the distance L1 from the highest point of the notch 62 to the lowest point of the fan blade 61 is greater than or equal to 7 mm and less than or equal to 8 mm.

[0127] Optionally, such as Figure 22 As shown, the ratio of the distance L1 from the highest point of the notch 62 to the lowest point of the blade 61 to the height of the blade 61 is greater than or equal to 0.06 and less than or equal to 0.12; or, the ratio of the distance L1 from the highest point of the notch 62 to the lowest point of the blade 61 to the height of the blade 61 is greater than or equal to 0.07 and less than or equal to 0.11; or, the ratio of the distance L1 from the highest point of the notch 62 to the lowest point of the blade 61 to the height of the blade 61 is greater than or equal to 0.08 and less than or equal to 0.1.

[0128] In this embodiment, by precisely controlling the distance between the highest point of the notch 62 and the lowest point L1 of the fan blade 61, as well as the highest point of the induced draft ring 30, within a specific range, the airflow organization and operating performance of the fan can be optimized. This ensures a smooth transition of airflow when entering the impeller 60, avoiding airflow impact, eddies, or backflow caused by excessively large or small gaps, thereby improving the fan's intake efficiency and airflow uniformity. Secondly, a reasonable gap setting helps reduce the noise level of the fan during operation, reduces vibration caused by airflow turbulence, and improves the fan's stability and service life. In addition, it can effectively protect the impeller 60 and the induced draft ring 30 from direct impact of impurities, reduce wear, and ensure the stability and reliability of the filtration effect. Furthermore, the optimized airflow path reduces the fan's operating resistance, enabling the fan to achieve efficient air delivery with lower energy consumption.

[0129] Optionally, the ratio of the distance between the highest point of the notch 62 and the highest point of the guide ring to the height of the fan blade 61 is greater than or equal to 0.05 and less than or equal to 0.15; or, the ratio of the distance between the highest point of the notch 62 and the highest point of the guide ring to the height of the fan blade 61 is greater than or equal to 0.07 and less than or equal to 0.15; or, the ratio of the distance between the highest point of the notch 62 and the highest point of the guide ring to the height of the fan blade 61 is greater than or equal to 0.08 and less than or equal to 0.1.

[0130] Optionally, the distance between the highest point of the notch 62 and the highest point of the air guide ring is greater than or equal to 5 mm and less than or equal to 10 mm, or the distance between the highest point of the notch 62 and the highest point of the air guide ring is greater than or equal to 7 mm and less than or equal to 9 mm.

[0131] In this embodiment, by controlling the ratio of the distance between the highest point of the notch 62 and the highest point of the guide ring to the height of the fan blade 61 within a specific range, and by directly controlling this distance within a reasonable range, the airflow organization and operating performance of the fan can be optimized. This ensures a smooth transition of airflow when entering the impeller 60, avoiding airflow impact, eddies, or backflow phenomena caused by excessively large or small gaps, thereby improving the fan's intake efficiency and airflow uniformity. Simultaneously, a reasonable gap ratio and distance help reduce the noise level during fan operation, reduce vibration caused by airflow turbulence, and improve stability and service life.

[0132] Optionally, the ratio of the distance L2 from the inner edge 621 of the notch to the outer edge 622 of the notch to the distance L3 from the inner edge 621 of the notch to the outer edge 611 of the fan blade is greater than or equal to 0.1 and less than or equal to 0.7; or the ratio of the distance L2 from the inner edge 621 of the notch to the outer edge 622 of the notch to the distance L3 from the inner edge 621 of the notch to the outer edge 611 of the fan blade is greater than or equal to 0.4 and less than or equal to 0.6; or the ratio of the distance L2 from the inner edge 621 of the notch to the outer edge 622 of the notch to the distance L3 from the inner edge 621 of the notch to the outer edge 611 of the fan blade is greater than or equal to 0.1 and less than or equal to 0.2.

[0133] Optionally, the distance L2 from the inner edge 621 of the notch to the outer edge 622 of the notch is greater than or equal to 2 mm and less than or equal to 20 mm; or, the distance L2 from the inner edge 621 of the notch to the outer edge 622 of the notch is greater than or equal to 3 mm and less than or equal to 18 mm; or, the distance L2 from the inner edge 621 of the notch to the outer edge 622 of the notch is greater than or equal to 3 mm and less than or equal to 5 mm; or, the distance L2 from the inner edge 621 of the notch to the outer edge 622 of the notch is greater than or equal to 17 mm and less than or equal to 19 mm.

[0134] In this embodiment, by precisely controlling the ratio of the distance L2 from the inner edge 621 to the outer edge 622 of the notch to the distance L3 from the inner edge 621 to the outer edge 611 of the blade, and by directly controlling the distance L2 from the inner edge 621 to the outer edge 622 of the notch, the airflow organization and filtration performance of the fan can be significantly optimized. This ensures a uniform distribution of airflow when entering the impeller 60, avoiding airflow deflection or local eddies caused by improper gaps, thereby improving the fan's intake efficiency and overall operational stability. A reasonable ratio and absolute distance help reduce the noise level during fan operation, reduce vibration caused by airflow impact, and extend the fan's service life. Furthermore, it ensures the effective utilization of the filter, making the airflow more uniform as it passes through the filter, improving filtration efficiency, reducing local wear on the filter, and further extending the filter's service life. The optimized airflow path reduces the fan's operating resistance, enabling the fan to achieve efficient air delivery with lower energy consumption.

[0135] Optionally, the notch 62 is rectangular. The regular shape of the rectangular notch makes the airflow more uniform when entering the impeller 60, reducing airflow turbulence and eddies caused by irregular shapes, thereby improving the fan's intake efficiency and operational stability. In addition, the edges of the rectangular notch are neat, which facilitates processing and manufacturing.

[0136] Optionally, the inner edge 351 of the induced draft ring is bent towards the impeller 60 to form a bent edge. Adding a bent edge to the inner edge 351 of the induced draft ring allows for more precise control of the initial airflow direction and velocity, reducing kinetic energy loss before the airflow enters the impeller 60. The optimized shape and orientation of the bent edge guide the airflow to better conform to the blade shape of the impeller 60, thereby improving the fan's intake efficiency. Simultaneously, the bent edge increases the structural strength of the induced draft ring 30, preventing deformation under high-speed airflow impact, thus extending the service life of the induced draft ring 30. Furthermore, the bent edge design also helps reduce noise because it reduces eddies and turbulence when the airflow enters the fan.

[0137] Optionally, such as Figure 12 and Figure 13 As shown, this embodiment of the present disclosure provides a housing assembly for a fresh air module. The housing assembly includes a housing 40, and the base plate 41 of the housing 40 includes a plurality of sub-base plates that are detachably connected in sequence. The plurality of sub-base plates include a linkage base plate. The fresh air module also includes a magnetic switch 49, which is disposed on the linkage base plate and is adapted to be electrically connected to the fan of the fresh air module. The magnetic switch 49 is configured to control the fan of the fresh air module to stop working when the linkage base plate is removed.

[0138] In this embodiment, the base plate 41 of the housing 40 includes multiple detachable sub-base plates, each of which can be independently disassembled to facilitate the inspection and replacement of components inside the fresh air module. Furthermore, removing any one sub-base plate does not cause the others to fall off, facilitating after-sales maintenance. Among the multiple sub-base plates is a linkage base plate. When the linkage base plate is removed, a magnetic switch 49 located on the linkage base plate is triggered. This magnetic switch 49 controls the fan to stop operating, thereby automatically cutting off power and preventing injury to maintenance personnel, protecting their lives.

[0139] Optionally, the multiple sub-base plates include a return air plate 42, a first maintenance plate 44, and a second maintenance plate 45 connected in sequence, with the return air plate 42 having a return air inlet 421; wherein, the linkage base plate includes one or more of the return air plate 42, the first maintenance plate 44, and the second maintenance plate 45.

[0140] In this embodiment, the base plate 41 of the housing 40 is divided into multiple detachable sub-base plates, including a return air plate 42, a first maintenance plate 44, and a second maintenance plate 45, making the maintenance and repair of the fresh air module more convenient. Each base plate 41 can be disassembled independently, facilitating maintenance or replacement of specific areas without disassembling the entire base plate 41, thus saving time and effort. The return air vent 421 on the return air plate 42 is used for return air to ensure air circulation. The magnetic switch 49 further enhances safety. When the linkage base plate (which can be at least one of the return air plate 42, the first maintenance plate 44, or the second maintenance plate 45) is removed, the magnetic switch 49 is triggered, automatically controlling the fan to stop working. This safety mechanism prevents the fan from accidentally starting during maintenance or repair, protecting the lives of maintenance personnel and reducing the risk of equipment operation. In addition, this design also ensures the reliability and ease of maintenance of the fresh air module, reducing potential equipment damage and maintenance costs.

[0141] Optionally, the first end of the first inspection plate 44 is snapped into the first end of the second inspection plate 45, and / or the second end of the first inspection plate 44 is snapped into the first end of the return air plate 42 and / or connected by screws.

[0142] In this embodiment, the first inspection plate 44, the second inspection plate 45, and the return air plate 42 are connected by snap-fit ​​and / or screws, enabling quick assembly and disassembly for easy inspection and maintenance of the fresh air module. The snap-fit ​​method is simple to operate, allowing for rapid disassembly and installation of the base plate 41, saving maintenance time; the screw connection enhances the connection's robustness, ensuring the stability of the base plate 41 during normal use. This combined connection method balances convenience and reliability, effectively improving the maintainability of the fresh air module.

[0143] Optionally, the first end of the first inspection plate 44 is provided with a connecting buckle 441, which extends along the length of the first end of the inspection plate. The first end of the second inspection plate 45 is provided with a snap-fit ​​hole 451, and the connecting buckle 441 can move relative to the snap-fit ​​hole 451. When the first end of the first inspection plate 44 is snapped with the first end of the second inspection plate 45, the connecting buckle 441 is located in the snap-fit ​​hole 451 and is limited and engaged with the snap-fit ​​hole 451.

[0144] In this embodiment, the locking hole 451 engages with the connecting buckle 441 to prevent displacement or loosening of the inspection plate during use, ensuring the sealing and integrity of the housing 40. Simultaneously, this locking method is easy to operate, allowing for quick disassembly and installation without the need for tools, thus improving maintenance efficiency.

[0145] Optionally, the second end of the first inspection plate 44 is provided with a first flange 442, and the first end of the return air plate 42 is provided with a second flange 424. When the first inspection plate 44 and the return air plate 42 are connected, the second flange 424 is pressed under the first flange 442 and connected by screws.

[0146] In this embodiment, the first inspection plate 44 and the return air plate 42 are connected by the cooperation of the first flange 442 and the second flange 424, and by screws, which enhances the strength and sealing of the connection. The second flange 424 is pressed under the first flange 442, which not only provides a physical limiting effect to prevent flange misalignment, but also increases the contact area at the connection and improves the stability of the overall structure. The screw connection further strengthens the connection between the two, ensuring that the connection remains firm under airflow impact or other external forces, and ensuring the normal operation of the fresh air module.

[0147] Optionally, such as Figure 18 and Figure 19 As shown, the sidewall of the housing 40 includes a first sidewall 46, the first end of which is engaged with the second end of the return air plate 42; wherein, the inner side of the first end of the first sidewall 46 is provided with a bent edge 461, and the second end of the return air plate 42 is provided with a hook 425. When the first sidewall 46 is connected to the return air plate 42, the hook 425 is engaged with the bent edge 461.

[0148] In this embodiment, the first sidewall 46 and the return air plate 42 are connected by a bent edge and a snap-fit ​​hook 425, simplifying the installation process and improving assembly efficiency. The tight fit between the snap-fit ​​hook 425 and the bent edge effectively prevents displacement between the sidewall and the return air plate 42, ensuring the integrity of the housing 40 and the smooth flow of airflow. This connection method not only meets the structural stability requirements but also facilitates disassembly when needed, providing convenience for the maintenance and repair of the fresh air module.

[0149] Optionally, the second inspection plate 45 includes a first plate body 452 and a second plate body 453. One end of the first plate body 452 is connected to the first inspection plate 44 and extends in a horizontal direction. The second plate body 453 is connected to the other end of the first plate body 452 and extends in a vertical direction. The side wall of the housing 40 includes a second side wall 47. The second plate body 453 abuts against the outer side of a portion of the second side wall 47 and is detachably connected to the second side wall 47.

[0150] In this embodiment, the second access plate 45 better adapts to the structure of the housing 40, providing more stable support. Simultaneously, the second plate 453 abuts against the outer side of the second sidewall 47, further enhancing the sealing and structural strength of the housing 40 and preventing air leakage. The detachable connection also allows for easy removal of the second access plate 45 when maintenance is required, facilitating maintenance and cleaning.

[0151] Optionally, the second inspection plate 45 is an L-shaped plate, which facilitates the removal of the second inspection plate from one side.

[0152] Optionally, the distance between the ceiling panel and the ceiling joists can be greater than or equal to 10mm and less than or equal to 30mm; or, the distance between the ceiling panel and the ceiling joists can be greater than or equal to 15mm and less than or equal to 25mm; or, the distance between the ceiling panel and the ceiling joists can be greater than or equal to 19mm and less than or equal to 22mm. This allows for a higher installation height and saves more interior space.

[0153] Optionally, the top plate 48 of the housing 40 is disposed opposite to the bottom plate 41 of the housing 40; the volute 10 is located inside the housing 40, the lower wall of the volute 10 and the bottom plate 41 of the housing 40 enclose a fresh air channel, and the upper wall of the volute 10 and the top plate 48 enclose an exhaust air channel; wherein the volute 10 and the housing 40 are detachably connected.

[0154] In this embodiment, the detachable connection between the volute 10 and the housing 40 facilitates the installation, maintenance, and repair of the fresh air module. When maintenance of the volute 10 or related components is required, the volute 10 can be quickly disassembled without disassembling the entire housing 40, thus saving time and effort. Furthermore, the position of the volute 10 can be flexibly adjusted or the volute 10 can be replaced in different application scenarios to adapt to different ventilation requirements.

[0155] Optionally, the return air plate 42, the first inspection plate 44, and the second inspection plate 45 are arranged sequentially from back to front.

[0156] Optionally, the return air plate 42 corresponds to the fan inlet 13 so that the airflow flowing in from the return air port 421 flows into the fan inlet 13.

[0157] Optionally, the first end (i.e., the front end) of the return air plate 42 is located in front of the center of the fan inlet 13 or corresponds to the center of the fan inlet 13. In this way, the return air plate 42 can cover at least half of the fan inlet 13, and the airflow entering through the return air port 421 of the return air plate 42 can flow into the fan inlet 13 more efficiently, and then into the exhaust duct 12. Furthermore, when the return air plate 42 is removed, sufficient space can be left for the fan to be inspected or replaced.

[0158] Optionally, the first inspection plate 44 corresponds to the fan filter 20. That is, after the first inspection plate 44 is removed, most or all of the fan filter 20 can be exposed to facilitate the replacement and maintenance of the fan filter 20.

[0159] Optionally, the first plate 452 of the second inspection plate 45 corresponds to the fresh air duct 11, that is, after the second inspection plate 45 is disassembled, the fresh air duct 11 can be inspected.

[0160] Therefore, in this embodiment, multiple sub-base plates are set to correspond to different components within the fresh air module. This way, when a specific component needs to be repaired or replaced, only the corresponding sub-base plate needs to be removed, which improves the convenience of maintenance.

[0161] Optionally, the width of the return air panel 42 is greater than the width of the first inspection panel 44 in the front-to-back direction. Optionally, the width of the return air panel 42 is greater than the width of the second inspection panel 45 in the front-to-back direction. By increasing the width of the return air panel 42, it can cover a larger area, thereby more effectively collecting and guiding return air and improving return air efficiency. At the same time, a wider return air panel 42 can provide better structural stability and enhance the strength of the entire housing 40.

[0162] Furthermore, the return air vent 421 corresponds to the fan. When the width of the return air plate 42 is greater than the width of the first maintenance plate 44 and the second maintenance plate 45, it can provide more operating space for the maintenance plate, making it easier for maintenance personnel to inspect the fan. This width difference also helps to optimize airflow distribution, reduce airflow resistance at the return air plate 42, and improve the smoothness of airflow.

[0163] Optionally, the width of the first inspection plate 44 is greater than the width of the first plate body 452 along the front-to-back direction. In this way, the first inspection plate 44 is located between the second inspection plate 45 and the return air plate 42, and the width of the first inspection plate 44 is less than the width of the first plate body 452, which makes it easier to leave enough space for maintenance of the fan filter 20.

[0164] Optionally, such as Figures 14 to 17 As shown, the return air panel 42 has a return air inlet 421. The fresh air module also includes a return air filter assembly 43, which is detachably disposed at the return air inlet 421 and is used to filter the airflow of the return air inlet 421. The first end of the return air filter assembly 43 has an insertion protrusion 431, and the second end of the return air filter assembly 43 has a limiting guide post 432. When the insertion protrusion 431 is inserted into the first end of the return air inlet 421, the limiting guide post 432 abuts against the second end of the return air inlet 421.

[0165] In this embodiment, the return air panel 42 has a return air inlet 421, and the return air filter assembly 43 is detachably installed in the return air inlet 421. One end of the return air filter assembly 43 is inserted into the return air inlet 421 via a plug-in protrusion 431, and the other end of the return air filter assembly 43 is limited by a limiting guide post 432. This ensures a tight fit between the return air filter assembly 43 and the return air panel 42, effectively preventing unfiltered air from entering the return air system. This not only improves the filtration effect but also reduces energy waste caused by poor sealing. In addition, the return air filter assembly 43 can be quickly installed and replaced via the plug-in protrusion 431 and the limiting guide post 432. Users can complete the installation and maintenance of the filter assembly without the need for professional tools, greatly reducing maintenance costs and system downtime.

[0166] Optionally, the first end of the return air vent 421 is provided with a plug-in interface 433, and both the plug-in interface 433 and the plug-in protrusion 431 extend along the direction from the second end of the return air vent 421 to the first end of the return air vent 421.

[0167] In this embodiment, when the return air filter assembly needs to be installed, the insertion protrusion 431 can be directly inserted into the insertion interface 433 without needing to be oriented in any other direction. Furthermore, this connection method enhances the stability and sealing of the return air filter assembly 43 during installation, ensuring it will not loosen due to airflow impact during operation and guaranteeing the continuous effectiveness of the filtration effect.

[0168] Optionally, the second end of the return air vent 421 is provided with a limiting engagement part. When the limiting guide post 432 abuts against the second end of the return air vent 421, the limiting guide post 432 abuts against the limiting engagement part.

[0169] In this embodiment, after the first end of the return air vent 421 is connected and limited by the plug interface 433 and the plug protrusion 431, the limiting mating part of the second end of the return air vent 421 abuts and limits the limit guide post 432, thus achieving the installation stability of the return air filter assembly.

[0170] Optionally, the return air vent 421 is also provided with multiple limiting buckles 434, which are arranged sequentially and at intervals along the circumference of the return air vent 421. When the return air filter assembly 43 is located in the return air vent 421, the multiple limiting buckles 434 are engaged with the outer edge of the return air filter assembly.

[0171] In this embodiment, when the return air filter assembly 43 is installed at the return air inlet 421, multiple limiting clips 434 are engaged with the outer edge of the return air filter assembly 43. This provides additional fixing and limiting functions, preventing the filter assembly from shifting or shaking during use, further improving the installation reliability of the return air filter assembly 43, and also facilitating disassembly and installation.

[0172] Optionally, the return air filter assembly 43 includes an air inlet grille 435, a return air filter frame 436, and a filter element. The air inlet grille 435 is detachably connected to the return air plate 42 and is provided with grille bars. The return air filter frame 436 is detachably connected to the inner side of the air inlet grille 435. The filter element is installed on the return air filter frame 436.

[0173] In this embodiment, the air inlet grille 435 is detachably connected to the return air plate 42 and is provided with grille strips for preliminary filtration and airflow guidance. The return air filter frame 436 is detachably connected to the inner side of the air inlet grille 435, and the filter element is installed in the return air filter frame 436. This modular design facilitates the independent replacement and maintenance of each component, improving the flexibility and maintainability of the entire filtration system.

[0174] Optionally, the return air filter frame 436 is snapped into the air inlet grille 435. This also facilitates the disassembly of the return air filter frame 436 and the air inlet grille.

[0175] Optionally, the outer side of the first end of the air inlet grille 435 is provided with a plugging protrusion 431, and the inner side of one end of the air inlet grille 435 is provided with a first buckle 437. When the return air filter frame 436 is connected to the air inlet grille 435, the first buckle 437 is engaged with the return air filter frame 436. The first buckle 437 and the plugging protrusion 431 are spaced apart along the length direction of the first end of the air inlet grille 435.

[0176] Optionally, a limiting guide post 432 is provided on the outer side of the second end of the air inlet grille 435, and a second buckle 438 is provided on the inner side of the second end of the air inlet grille 435. When the return air filter frame 436 is connected to the air inlet grille 435, the second buckle 438 is engaged with the return air filter frame 436. The second buckle 438 and the limiting guide post 432 are arranged at intervals along the length direction of the second end of the air inlet grille 435.

[0177] In this embodiment, when the return air filter frame 436 is connected to the inlet grille 435, the first and second clips engage with the return air filter frame 436 respectively. This design makes the connection between the inlet grille and the return air filter frame tighter and more secure, while also facilitating quick disassembly and installation, thus improving maintenance efficiency.

[0178] This disclosure also provides a fresh air module, which includes a housing assembly for a fresh air module as described in any of the preceding embodiments.

[0179] The fresh air module provided in this disclosure includes the housing assembly for the fresh air module described in any of the above embodiments, and therefore has the beneficial effects of the housing assembly for the fresh air module described in any of the above embodiments, which will not be repeated here.

[0180] This disclosure also provides an air handling device, which includes a fresh air module as described in any of the preceding embodiments.

[0181] The air handling apparatus provided in this disclosure includes the fresh air module described in any of the above embodiments, and therefore has the beneficial effects of the fresh air module in any of the above embodiments, which will not be repeated here.

[0182] Alternatively, the air handling unit can be a fresh air module, a fresh air unit, an air conditioner, or an air purification unit.

[0183] Alternatively, the air handling unit can be used in various indoor spaces such as kitchens, living rooms, or bedrooms.

[0184] Optionally, the air handling unit includes a fresh air module, which includes a detection device 533 disposed in the air intake ring for detecting air parameters of the airflow flowing to the fan inlet. In this embodiment of the air handling unit, the detection device is located in the air intake ring, allowing for the detection of the airflow entering the fan inlet. This means that by using the detection device in the air intake ring, the airflow flowing into the fresh air module can be uniformly detected, eliminating the need for detection devices in each room, thus saving costs. Furthermore, the airflow returning from each room is detected by the detection device within the fresh air module, improving the uniformity of detection and consequently enhancing the uniformity of fresh air module regulation.

[0185] Optionally, the detection device includes a temperature sensor, a humidity sensor, and / or a gas concentration sensor; and / or, the detection device is detachably connected to the induced draft fan. This facilitates the disassembly, maintenance, and replacement of the detection device.

[0186] Optionally, there are multiple detection devices, including a first detection device and a second detection device, which are spaced apart from each other in the air intake ring. Figure 2 As shown, the first detection device 531 and the second detection device 532 are arranged at intervals. Optionally, the first detection device is a temperature sensor. Optionally, the second detection device 532 is a humidity sensor and / or a gas concentration sensor.

[0187] Optionally, the air handling unit also includes a communication module 54, which is located in the air intake and / or fresh air inlet and is connected in communication with the detection device.

[0188] In this embodiment, the communication module 54 transmits the air parameters (such as temperature, humidity, and gas concentration) detected by the detection device to the controller of the fresh air module. Based on this data, the controller determines the indoor air quality and adjusts the operating mode of the fresh air module accordingly, such as adjusting the fan speed and controlling the fresh air volume, to meet the indoor air conditioning needs. The communication module can also transmit data to a remote server or mobile terminal (such as a mobile app), allowing users to remotely view the indoor air quality and the operating status of the fresh air module. Users can also remotely control the fresh air module through the terminal, such as turning it on or off in advance and adjusting the operating mode, thus improving ease of use.

[0189] Optionally, there may be multiple communication devices 54, including a first communication device 541 and a second communication device 542. The first communication device 541 is located in the air intake ring, and the second communication device 542 is located on one side of the fresh air inlet. Different communication devices 54 can transmit gas information detected by corresponding different detection devices to the controller, thereby improving the accuracy of control.

[0190] Optionally, the air handling equipment further includes an air conditioning system and a controller. The air conditioning system is used to regulate the indoor temperature. The controller is electrically connected to both the air conditioning system and the fresh air unit. When the fresh air damper is open and the difference between the outdoor humidity and the indoor humidity is less than or equal to a humidity threshold, the controller is configured to control the first drive mechanism to move so that the fresh air damper is adjusted to a first opening degree, and control the air conditioning system to reduce its cooling power. When the fresh air damper is open, the outdoor humidity is greater than the indoor humidity, and the difference between the outdoor and indoor humidity is greater than a humidity threshold, the controller is configured to control the first drive mechanism to move so that the fresh air damper is adjusted to a second opening degree, the second opening degree being less than the first opening degree, and control the air conditioning system to increase its cooling power.

[0191] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A housing assembly for a fresh air module, characterized in that, include: The housing, the base plate of the housing includes multiple sub-base plates that are detachably connected in sequence, and the multiple sub-base plates include a linkage base plate; A magnetic switch is located on the linkage base plate. The magnetic switch is suitable for electrical connection with the fan of the fresh air module. The magnetic switch is configured to control the fan of the fresh air module to stop working when the linkage base plate is removed.

2. The housing assembly for a fresh air module according to claim 1, characterized in that, Multiple sub-base plates include a return air plate, a first maintenance plate, and a second maintenance plate connected in sequence, with the return air plate having a return air inlet; wherein, the linkage base plate includes one or more of the return air plate, the first maintenance plate, and the second maintenance plate.

3. The housing assembly for a fresh air module according to claim 2, characterized in that, The first end of the first inspection plate is engaged with the first end of the second inspection plate, and / or the second end of the first inspection plate is engaged with the first end of the return air plate and / or connected by screws.

4. The housing assembly for a fresh air module according to claim 3, characterized in that, The first end of the first inspection plate is provided with a connecting buckle, which extends along the length of the first end of the inspection plate. The first end of the second inspection plate is provided with a snap-fit ​​hole, and the connecting buckle can move relative to the snap-fit ​​hole. When the first end of the first inspection plate and the first end of the second inspection plate are snapped together, the connecting buckle is located in the snap-fit ​​hole and is limited and matched with the snap-fit ​​hole.

5. The housing assembly for a fresh air module according to claim 3, characterized in that, The first inspection plate has a first flange at its second end, and the return air plate has a second flange at its first end. When the first inspection plate and the return air plate are connected, the second flange is pressed under the first flange and connected by screws.

6. The housing assembly for a fresh air module according to claim 3, characterized in that, The sidewalls of the housing include: The first side wall, the first end of which is engaged with the second end of the return air panel; The first sidewall has a bent edge on the inner side of its first end, and the return air plate has a hook at its second end. When the first sidewall is connected to the return air plate, the hook engages with the bent edge.

7. The housing assembly for a fresh air module according to claim 3, characterized in that, The second inspection panel includes: The first plate has one end connected to the first maintenance plate and extends horizontally. The second plate is connected to the other end of the first plate and extends vertically. The shell includes a second sidewall, and a second plate abuts against the outer side of a portion of the second sidewall and is detachably connected to the second sidewall.

8. The housing assembly for a fresh air module according to any one of claims 1 to 7, characterized in that, The housing also includes: The top plate is positioned opposite the bottom plate of the shell. The volute is located inside the shell. The lower wall of the volute and the bottom plate of the shell enclose a fresh air channel, and the upper wall of the volute and the top plate enclose an exhaust air channel. The volute and the outer shell are detachably connected.

9. A fresh air module, characterized in that, Includes the housing assembly for the fresh air module as described in any one of claims 1 to 8.

10. An air handling device, characterized in that, Includes the fresh air module as described in claim 9.

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