Fresh air ventilator with improved air duct structure

Abstract

This utility model discloses an improved air duct structure for a fresh air exchanger, including a casing, a fresh air fan, an exhaust fan, an outer cavity, an inner cavity, and a heat exchanger. The outer cavity is a one-piece multi-cavity structure, including an air inlet component, an exhaust volute, and an exhaust component, with the exhaust fan housed in the exhaust volute. The inner cavity is also a one-piece multi-cavity structure, including a fresh air component, a fresh air volute, and a return air component, with the fresh air fan housed in the fresh air volute. The outer cavity is located on the outdoor side inside the casing, and the inner cavity is located on the indoor side inside the casing, with the heat exchanger positioned between them. The fresh air exchanger provided by this utility model divides the interior into multiple installation areas through the one-piece inner and outer cavities, placing the fan in the center of the exchanger with the center of gravity close to the structural axis, resulting in a more rational distribution. The fan can be quickly disassembled and maintained along with the cavities.

Description

Technical Field

[0001] This utility model relates to a fresh air exchanger with an improved air duct structure, belonging to the field of air conditioning technology. Background Technology

[0002] The main function of a fresh air exchanger is to exchange indoor and outdoor air, filtering particulate matter from outdoor air and providing high-quality indoor air. The fan provides the airflow, while the ductwork isolates and filters the air. Simultaneously, a heat exchanger exchanges heat between different sections of the airflow, improving energy efficiency.

[0003] Chinese utility model patent number ZL 202320049522.5 discloses a fresh air exchanger. This technical solution includes a casing, internally divided into an outdoor air inlet chamber, a first filter chamber, a heat exchange chamber, a second filter chamber, an indoor fresh air chamber, an indoor air inlet chamber, an outdoor exhaust chamber, and a bypass chamber. This forms indoor fresh air duct paths, outdoor exhaust air duct paths, and bypass fresh air duct paths.

[0004] Similarly, existing technologies typically place the fan on one side or diagonally opposite the fresh air exchanger. A significant portion of the fresh air exchanger's energy is lost due to poor duct design, resulting in low energy efficiency. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a fresh air exchanger with an improved air duct structure.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution:

[0007] According to an embodiment of this utility model, an improved air duct structure fresh air exchanger is provided, comprising a casing, a fresh air fan, an exhaust fan, an outer cavity, an inner cavity, and a heat exchanger; wherein...

[0008] The outer cavity is a one-piece multi-cavity structure, including an air inlet component, an exhaust volute, and an exhaust component. The exhaust volute is disposed between the air inlet component and the exhaust component. The exhaust fan is disposed in the exhaust volute.

[0009] The inner cavity is a one-piece molded multi-cavity structure, including a fresh air component, a fresh air volute, and a return air component. The fresh air volute is disposed between the fresh air component and the return air component. The fresh air fan is disposed in the fresh air volute.

[0010] The outer cavity is located on the outdoor side inside the chassis, the inner cavity is located on the indoor side inside the chassis, and the heat exchanger is located between the outer cavity and the inner cavity.

[0011] Preferably, the air inlet component includes an air inlet base plate, an air inlet wall plate, an air inlet top plate, and an air inlet inclined plate; wherein...

[0012] The air inlet bottom plate and the air inlet wall plate are flat plate structures, while the air inlet top plate and the air inlet inclined plate are plate structures with spatial curved surfaces.

[0013] The Z-direction proximal end of the air inlet wall panel contacts the X-direction distal end of the air inlet base plate, the Z-direction distal end of the air inlet wall panel contacts the X-direction distal end of the air inlet top plate, the X-direction proximal end of the air inlet top plate contacts the Z-direction distal end of the air inlet inclined plate, and the Z-direction proximal end of the air inlet inclined plate contacts the X-direction proximal end of the air inlet base plate.

[0014] Preferably, the exhaust volute includes an exhaust volute bottom plate, an exhaust volute back plate, and an exhaust volute curved plate; wherein...

[0015] The bottom plate of the exhaust volute is a flat plate structure, the back plate of the exhaust volute is an annular plate structure, and the curved plate of the exhaust volute is a bent plate structure with the bending axis parallel to the Y direction.

[0016] The Z-direction proximal end of the exhaust volute curved plate contacts the X-direction distal end of the exhaust volute bottom plate; the exhaust volute back plate is arranged along the Z-direction and contacts the Y-direction proximal end of the exhaust volute curved plate, and the Z-direction proximal end of the exhaust volute back plate contacts the exhaust volute bottom plate.

[0017] Preferably, the exhaust component includes an exhaust base plate, an exhaust back plate, and an exhaust top plate; wherein...

[0018] The exhaust bottom plate is a flat plate structure, and the exhaust back plate and the exhaust top plate are plate structures with spatial curved surfaces;

[0019] The Z-direction proximal end of the exhaust back panel contacts the Y-direction distal end of the exhaust bottom panel, and the Z-direction distal end contacts the Y-direction distal end of the exhaust top panel.

[0020] Preferably, the near end of the air inlet base plate in the X direction contacts the far end of the air exhaust volute base plate in the X direction; the near ends of the air inlet top plate and the air inlet inclined plate in the X direction both contact the far end of the air exhaust volute curved plate in the X direction; and the hollow channels of the air inlet component and the air exhaust volute are not connected.

[0021] The far end of the exhaust base plate in the X direction contacts the near end of the exhaust volute base plate in the X direction; the far end of the exhaust top plate in the X direction contacts the near end of the exhaust volute curved plate and the exhaust volute back plate in the X direction; the hollow channel of the exhaust component and the exhaust volute is connected.

[0022] Preferably, the fresh air component includes a fresh air base plate and a fresh air back plate; wherein...

[0023] The fresh air base plate is a curved plate structure with the bending axis parallel to the Y direction and the opening facing the opposite direction of the X direction; the fresh air back plate is a plate structure with a spatial curved surface, set along the Z direction, and in contact with the near end of the fresh air base plate in the Y direction.

[0024] Preferably, the fresh air volute includes a fresh air volute base plate, a fresh air volute back plate, and a fresh air volute curved plate; wherein...

[0025] The bottom plate of the fresh air volute is a flat plate structure, the back plate of the fresh air volute is a ring plate structure, and the curved plate of the fresh air volute is a bent plate structure with the bending axis parallel to the Y direction.

[0026] The Z-direction proximal end of the fresh air volute curved plate contacts the X-direction proximal end of the fresh air volute bottom plate; the fresh air volute back plate is arranged along the Z-direction and contacts the Y-direction distal end of the fresh air volute curved plate; the Z-direction proximal end of the fresh air volute back plate contacts the fresh air volute bottom plate.

[0027] Preferably, the return air component includes a return air baffle, a return air wall panel, a return air top panel, and a return air inclined plate; wherein...

[0028] The return air baffle and the return air wall panel are plate structures with openings, both arranged along the Z direction; the return air top plate and the return air inclined plate are plate structures with spatial curved surfaces; the return air top plate is arranged along the XY plane direction, and the return air inclined plate is arranged along the Z direction.

[0029] The near end of the return air inclined plate in the X direction contacts the far end of the return air baffle in the X direction, and the far end in the Z direction contacts the far end of the return air top plate in the X direction; the far end in the Z direction of the return air baffle contacts the near end in the Z direction of the return air top plate; the far end in the Z direction of the return air wall panel contacts the near end in the X direction of the return air top plate; the near end in the X direction of the return air baffle and the near end in the Y direction of the return air wall panel are in contact with each other.

[0030] Preferably, the Z-direction proximal end of the return air inclined plate contacts the X-direction proximal end of the fresh air volute bottom plate; the X-direction distal ends of both the return air inclined plate and the return air top plate contact the X-direction proximal end of the fresh air volute curved plate; and the hollow channels of the return air component and the fresh air volute are not connected.

[0031] The near end of the fresh air base plate in the X direction contacts the far end of the fresh air volute base plate and the curved plate of the fresh air volute in the X direction; the hollow channel of the fresh air component and the fresh air volute is connected.

[0032] Preferably, the fresh air exchanger further includes a bypass valve, a controller, and a bypass partition; wherein...

[0033] The bypass valve includes a valve plate and a servo motor; the valve plate is disposed along the Z-direction between the return air baffle and the return air wall panel, and its Y-direction proximal end is rotatably connected to the Y-direction proximal end of the return air wall panel; the servo motor is designed to drive the valve plate to rotate.

[0034] The controller is connected to the servo motor and is designed to control the rotational position of the valve plate.

[0035] The shape of the bypass partition is adapted to the return air wall panel and the housing; the return air wall panel, the housing and the bypass partition are designed to surround and form a hollow channel structure.

[0036] Compared with existing technologies, this utility model uses an integrated inner and outer cavity to separate the internal space of the fresh air exchanger, allowing the fan to be centrally located, optimizing the overall center of gravity distribution, improving structural stability, and facilitating installation and maintenance. Its ingenious air duct layout places the fresh air fan and exhaust fan in the middle of the inner and outer cavities respectively, forming a highly efficient airflow system, reducing energy loss and improving energy utilization efficiency. The heat exchanger is designed with parallel, non-crossing air ducts to isolate fresh air from stale air, avoiding cross-contamination, while simultaneously enhancing heat exchange efficiency and saving heating or cooling energy. The bypass valve allows for flexible switching between heat exchange and bypass ventilation based on indoor and outdoor climate conditions, further reducing exhaust resistance and fan energy consumption, achieving intelligent energy-saving operation. Furthermore, the inner surfaces of each cavity feature rounded corners to reduce air resistance and improve fan efficiency. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a fresh air exchanger with an improved duct structure, as described in this embodiment of the present invention.

[0038] Figure 2 for Figure 1 A cross-sectional view of the fresh air exchanger, excluding the heat exchanger;

[0039] Figure 3 for Figure 1 A schematic diagram of the structure of the outer cavity;

[0040] Figure 4 for Figure 3 A schematic diagram of the back structure of the outer cavity in the middle;

[0041] Figure 5 for Figure 1 A schematic diagram of the inner cavity;

[0042] Figure 6 for Figure 5 A schematic diagram of the back structure of the inner cavity;

[0043] Figure 7 for Figure 1A schematic diagram of the airflow path for the fresh air exchanger in the middle;

[0044] Figure 8 for Figure 7 A top-view diagram of the airflow path of the fresh air exchanger in the middle. Detailed Implementation

[0045] The technical content of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] The technical concept in this embodiment of the invention is to arrange fresh air and exhaust fans along the structural axis of the fresh air exchanger. Specifically, by using multiple integrally molded cavities, the internal structure of the fresh air exchanger is simplified, and the fans are centrally positioned, optimizing the air duct and the center of gravity of the exchanger, thus providing a maximum airflow of 1300m. 3 / h fresh air volume. Parallel, non-crossing fresh and exhaust air ducts are formed at the heat exchanger, completely isolating fresh and stale air, avoiding cross-contamination, and improving heat exchange efficiency.

[0047] like Figure 1 and Figure 2 As shown in the figure, the fresh air exchanger 100 provided in this embodiment of the utility model includes a casing 1, a fresh air fan 2, an exhaust fan 3, an outer cavity 4, an inner cavity 5, a bypass valve 6, a heat exchanger 7, and a controller 8. The fresh air fan 2 and the exhaust fan 3 are collectively referred to as fans. In the figure, the direction from the upper left to the lower right is the X direction, the direction from the lower left to the upper right (from the outdoor side to the indoor side) is the Y direction, and the direction from bottom to top is the Z direction. It is worth noting that the direction indicated by the arrows in the figure is the positive direction of each direction, and vice versa. The end of a component shown in the figure closer to the positive direction is called the far end of that component along that direction, and the end closer to the negative direction is called the proximal end.

[0048] The chassis 1 includes a shell 11, an air inlet 12, a fresh air inlet 13, a return air inlet 14, an exhaust air inlet 15, a bypass partition 16, an air inlet cover 17, and an exhaust air cover 18. The air inlet 12 is the entrance for outdoor air (fresh air) into the fresh air exchanger 100; the fresh air inlet 13 is the exit for outdoor air leaving the fresh air exchanger 100 and entering the indoor air; the return air inlet 14 is the entrance for indoor air (stale air) into the fresh air exchanger 100; and the exhaust air inlet 15 is the exit for indoor air leaving the fresh air exchanger 100 and entering the outdoor air. The fresh air fan 2 and the exhaust fan 3 provide power for the airflow.

[0049] It is worth noting that the air inlet cover 17 and the air outlet cover 18 are in contact with and connected to the housing 11. By removing or changing the installation position of the air inlet cover 17, the position and orientation of the air inlet 12 can be changed; by removing or changing the installation position of the air outlet cover 18, the position and orientation of the air outlet 15 can be changed. Therefore, users can change the duct connection position according to the on-site installation conditions.

[0050] The housing 11 is a rectangular structural component made of thin metal sheet, and its interior is divided into multiple equipment installation areas and spaces by partitions and supporting components. The outer cavity 4 and the inner cavity 5 are in contact with the housing 11, respectively, and are separated into multiple independent spaces.

[0051] like Figure 3 and Figure 4 As shown, the outer cavity 4 is a one-piece multi-cavity structure, including an air inlet component 41, an exhaust volute 42, and an exhaust component 43. The X-direction distal end of the exhaust volute 42 contacts the air inlet component 41, and the X-direction proximal end contacts the exhaust component 43.

[0052] The air intake component 41 includes an air intake base plate 411, an air intake wall plate 412, an air intake top plate 413, and an air intake inclined plate 414. The air intake base plate 411 and air intake wall plate 412 are flat plate structures, while the air intake top plate 413 and air intake inclined plate 414 are plate structures with spatial curved surfaces. The Z-direction proximal end of the air intake wall plate 412 contacts the X-direction distal end of the air intake base plate 411; the Z-direction distal end of the air intake wall plate 412 contacts the X-direction distal end of the air intake top plate 413; the X-direction proximal end of the air intake top plate 413 contacts the Z-direction distal end of the air intake inclined plate 414; and the Z-direction proximal end of the air intake inclined plate 414 contacts the X-direction proximal end of the air intake base plate 411. In other words, the air intake component 41 is a hollow channel structure. The Y-direction near-end opening of the channel (formed by the air intake base plate 411, air intake wall plate 412, air intake top plate 413, and air intake inclined plate 414) is the first air intake 41a, and the Y-direction far-end opening (formed by the air intake base plate 411, air intake wall plate 412, air intake top plate 413, and air intake inclined plate 414) is the second air intake 41b.

[0053] The exhaust volute 42 includes an exhaust volute base plate 421, an exhaust volute back plate 422, and an exhaust volute curved plate 423. The exhaust volute base plate 421 is a flat plate structure, the exhaust volute back plate 422 is an annular plate structure, and the exhaust volute curved plate 423 is a C-shaped bent plate structure with its bending axis parallel to the Y-direction. The Z-direction proximal end of the exhaust volute curved plate 423 contacts the X-direction distal end of the exhaust volute base plate 421. The exhaust volute back plate 422 is positioned along the Z-direction and contacts the Y-direction proximal end of the exhaust volute curved plate 423; the Z-direction proximal end of the exhaust volute back plate 422 contacts the exhaust volute base plate 421. In other words, the exhaust volute 42 is a hollow channel structure. The X-direction proximal opening of the channel is the first exhaust volute opening 42a, the Y-direction proximal opening (the hole in the exhaust volute back plate 422) is the second exhaust volute opening 42b, and the Y-direction distal opening is the third exhaust volute opening 42c.

[0054] The exhaust component 43 includes an exhaust base plate 431, an exhaust back plate 432, and an exhaust top plate 433. The exhaust base plate 431 is a flat plate, while the exhaust back plate 432 and exhaust top plate 433 are plate structures with spatial curved surfaces. The Z-direction proximal end of the exhaust back plate 432 contacts the Y-direction distal end of the exhaust base plate 431, and the Z-direction distal end contacts the Y-direction distal end of the exhaust top plate 433. In other words, the exhaust component 43 is a hollow channel structure. The X-direction distal opening of this channel (formed by the exhaust base plate 431, exhaust back plate 432, and exhaust top plate 433) is the first exhaust port 43a, and the Y-direction proximal opening (formed by the exhaust base plate 431 and exhaust top plate 433) is the second exhaust port 43b.

[0055] Optionally, the exhaust component 43 further includes an exhaust fin 434. The exhaust fin 434 is arranged in a direction parallel to the XY plane, bending from the first exhaust port 43a to the second exhaust port 43b, with its distal Y-axis end contacting the exhaust back plate 432. The exhaust fin 434 can guide the airflow from the first exhaust port 43a to the second exhaust port 43b, reducing air resistance.

[0056] The near end of the air inlet base plate 411 in the X direction contacts the far end of the exhaust volute base plate 421 in the X direction. The near ends of the air inlet top plate 413 and the air inlet inclined plate 414 in the X direction both contact the far end of the exhaust volute curved plate 423 in the X direction, but the hollow channels of the air inlet component 41 and the exhaust volute 42 are not connected. In other words, the first air inlet 41a and the second air inlet 41b are not connected to the first exhaust volute inlet 42a, the second exhaust volute inlet 42b, and the third exhaust volute inlet 42c.

[0057] The distal end of the exhaust base plate 431 in the X direction contacts the proximal end of the exhaust volute base plate 421 in the X direction. The distal end of the exhaust top plate 433 in the X direction contacts the proximal ends of the exhaust volute curved plate 423 and the exhaust volute back plate 422 in the X direction. Furthermore, the first exhaust volute opening 42a is connected to the first exhaust outlet 43a. Therefore, the hollow channel between the exhaust component 43 and the exhaust volute 42 is connected.

[0058] Preferably, the inner surface of the outer cavity 4 is designed with rounded corners to reduce wind resistance and improve fan efficiency.

[0059] like Figure 5 and Figure 6 As shown, the inner cavity 5 is a one-piece multi-cavity structure, including a fresh air component 51, a fresh air volute 52, and a return air component 53. The far end of the fresh air volute 52 in the X direction contacts the fresh air component 51, and the near end in the X direction contacts the return air component 53.

[0060] The fresh air component 51 includes a fresh air base plate 511 and a fresh air back plate 512. The fresh air base plate 511 is a U-shaped curved plate structure with its bending axis parallel to the Y-direction and its U-shaped opening facing the opposite direction to the X-direction. The fresh air back plate 512 is a plate structure with a spatial curved surface, approximately positioned along the Z-direction, and contacts the proximal Y-direction end of the fresh air base plate 511. In other words, the fresh air component 51 is a hollow channel structure. The proximal X-direction opening of this channel (formed by the fresh air base plate 511 and the fresh air back plate 512) is the first fresh air inlet 51a, and the distal Y-direction opening (formed by the fresh air base plate 511) is the second fresh air inlet 51b.

[0061] The fresh air volute 52 includes a fresh air volute base plate 521, a fresh air volute back plate 522, and a fresh air volute curved plate 523. The fresh air volute base plate 521 is a flat plate structure, the fresh air volute back plate 522 is an annular plate structure, and the fresh air volute curved plate 523 is a C-shaped bent plate structure with its bending axis parallel to the Y direction. The Z-direction proximal end of the fresh air volute curved plate 523 contacts the X-direction proximal end of the fresh air volute base plate 521. The fresh air volute back plate 522 is positioned along the Z direction and contacts the Y-direction distal end of the fresh air volute curved plate 523; the Z-direction proximal end of the fresh air volute back plate 522 contacts the fresh air volute base plate 521. In other words, the fresh air volute 52 is a hollow channel structure. The far-end opening in the X direction of the channel is the first fresh air volute opening 52a, the far-end opening in the Y direction (the hole in the fresh air volute back plate 522) is the second fresh air volute opening 52b, and the near-end opening in the Y direction is the third fresh air volute opening 52c.

[0062] The return air component 53 includes a return air baffle 531, a return air wall panel 532, a return air top panel 533, and a return air inclined plate 534. The return air baffle 531 and return air wall panel 532 are perforated plate structures, both arranged along the Z-direction. The return air top panel 533 and return air inclined plate 534 are plate structures with spatial curved surfaces; the return air top panel 533 is arranged along the XY plane, and the return air inclined plate 534 is arranged along the Z-direction. The near-end of the return air inclined plate 534 in the X-direction contacts the far-end of the return air baffle 531 in the X-direction, and the far-end of the return air inclined plate 534 in the Z-direction contacts the far-end of the return air top panel 533 in the X-direction. The far-end of the return air baffle 531 in the Z-direction contacts the near-end surface (lower surface) of the return air top panel 533 in the Z-direction. The far-end of the return air wall panel 532 in the Z-direction contacts the near-end of the return air top panel 533 in the X-direction. The near-X end of the return air baffle 531 and the near-Y end of the return air wall panel 532 are in contact with each other. In other words, the projections of the return air baffle 531 and the return air wall panel 532 on the XY plane are in contact with each other and form a certain angle. The return air component 53 is a hollow channel structure. The far-Y opening of this channel (formed by the return air baffle 531, the return air wall panel 532, and the return air top plate 533) is the first return air inlet 53a, the near-X opening (the opening in the return air wall panel 532) is the second return air inlet 53b, and the far-X opening (the opening in the return air baffle 531) is the third return air inlet 53c.

[0063] The Z-direction proximal end of the return air ramp 534 contacts the X-direction proximal end of the fresh air volute bottom plate 521. The X-direction distal ends of both the return air ramp 534 and the return air top plate 533 contact the X-direction proximal ends of the fresh air volute curved plate 523. However, the hollow channels of the return air component 53 and the fresh air volute 52 are not connected. In other words, the first return air inlet 53a, the second return air inlet 53b, and the third return air inlet 53c are not connected to the first fresh air volute inlet 52a, the second fresh air volute inlet 52b, and the third fresh air volute inlet 52c.

[0064] The near end of the fresh air base plate 511 in the X direction contacts the far end of the fresh air volute base plate 521 and the fresh air volute curved plate 522 in the X direction. Furthermore, the first fresh air volute opening 52a is connected to the first fresh air inlet 51a. Therefore, the hollow channels of the fresh air component 51 and the fresh air volute 52 are connected.

[0065] Preferably, the inner surface of the inner cavity 5 adopts a rounded corner transition design to reduce wind resistance and improve fan efficiency.

[0066] The bypass valve 6 includes a valve plate 61 and a servo motor 62, and is disposed in the inner cavity 5. The valve plate 61 is positioned along the Z-axis between the return air baffle 531 and the return air wall panel 532, and its proximal Y-axis end is rotatably connected to the proximal Y-axis end of the return air wall panel 532. The servo motor 62 can drive the valve plate 61 to rotate around this rotatable connection. In other words, the valve plate 61 can rotate within the space surrounded by the first return air inlet 53a, the second return air inlet 53b, and the third return air inlet 53c. Furthermore, the shape of the valve plate 61 is adapted to the second return air inlet 53b and the third return air inlet 53c, thus allowing it to close either the second return air inlet 53b or the third return air inlet 53c under the drive of the servo motor 62. In other words, the bypass valve 6 can block the airflow path of either the second return air inlet 53b or the third return air inlet 53c. The servo motor 62 is connected to a controller 8, which can control the rotational position of the valve plate 61.

[0067] The heat exchanger 7 is a columnar component with a longitudinal direction. Its cross-sectional shape perpendicular to the longitudinal direction includes hexagons and quadrilaterals; in this embodiment, a quadrilateral columnar shape is used as an example. The heat exchanger 7 has a heat exchange efficiency of 75% or higher and is installed in the heat exchanger mounting area R7 of the chassis 1. The heat exchanger 7 divides the heat exchanger mounting area R7 into an air inlet area R71, an air outlet area R72, a fresh air area R73, and a return air area R74. Sealing films are provided on the mating surfaces of the chassis 1 and the heat exchanger 7 to ensure airtight isolation of the four partitioned areas.

[0068] Heat exchanger 7 directly connects the fresh air zone R73 with the intake air zone R71; this channel is called the fresh air duct. Heat exchanger 7 also directly connects the return air zone R74 with the exhaust air zone R72; this channel is called the exhaust air duct. The fresh air duct and exhaust air duct inside heat exchanger 7 are airtightly isolated from each other. However, their layered, staggered internal air duct structure and special material properties allow for thorough heat exchange between the airflow in both channels, thus reducing energy loss in the ventilation equipment and achieving energy conservation and emission reduction.

[0069] The outer cavity 4 is located on the outdoor side inside the chassis 1, the inner cavity 5 is located on the indoor side inside the chassis 1, and the heat exchanger 7 is located between the outer cavity 4 and the inner cavity 5. All three are arranged along the X-direction and along the Y-direction. The air inlet component 41 and the fresh air component 51 are symmetrically arranged with respect to the heat exchanger 7, and the exhaust component 43 and the return air component 53 are symmetrically arranged with respect to the heat exchanger 7. The first air inlet 41a is connected to the air inlet 12, and the size of the first air inlet 41a is larger than that of the air inlet 12. The second exhaust outlet 43b is connected to the exhaust outlet 15, and the size of the second exhaust outlet 43b is larger than that of the exhaust outlet 15. The second fresh air inlet 51b is connected to the fresh air inlet 13, and the size of the first fresh air inlet 51b is larger than that of the fresh air inlet 13. The first return air inlet 53a is connected to the return air inlet 14, and the size of the first return air inlet 53a is larger than that of the return air inlet 14. The second exhaust volute inlet 42b and the third exhaust volute inlet 42c are connected to the fresh air zone R73, and the second fresh air volute inlet 52b and the third fresh air volute inlet 52c are connected to the exhaust zone R72.

[0070] Therefore, the hollow channel of the air intake component 41 is connected to the air intake zone R71, the hollow channels of the fresh air component 51 and the fresh air volute 52 are connected to the fresh air zone R73, the hollow channel of the return air component 53 is connected to the return air zone R74, and the hollow channels of the exhaust component 43 and the exhaust volute 42 are connected to the exhaust zone R72.

[0071] The fresh air fan 2 is located in the fresh air volute 52 (in the middle of the inner cavity 5) and provides airflow power for the fresh air duct. The exhaust fan 3 is located in the exhaust volute 42 (in the middle of the outer cavity 4) and provides airflow power for the exhaust duct. Optionally, an intake air filter is installed in the intake component 41 and the intake zone R71, a fresh air filter is installed in the fresh air zone R73 and the fresh air component 51, and a return air filter is installed in the return air component 53 and the return air outlet R74 to filter suspended particulate matter and odors in the airflow.

[0072] It is worth noting that the return air wall panel 532, the housing 11, and the bypass baffle 16 surround and form a hollow channel structure, called the bypass chamber R6. The shape of the bypass baffle 16 is adapted to the return air wall panel 532 and the housing 11. The far-end opening of the bypass chamber R6 in the Y direction is the second return air inlet 53b, and the near-end opening in the Y direction is connected to the exhaust air zone R72. This channel is called the bypass channel. The flow area of ​​the bypass channel is larger than that of the exhaust air channel. The bypass valve 6 is installed in the return air component 53 and can open or close the second return air inlet 53b, that is, open or close the bypass channel. Because the air resistance of the exhaust air channel is much greater than that of the bypass channel, and the exhaust air channel and the bypass channel are connected in parallel, when the bypass valve 6 opens the bypass channel and closes the exhaust air channel, the exhaust air resistance can be reduced, the required power of the exhaust fan 3 can be reduced, and thus energy can be saved.

[0073] The following example, using heat exchange mode, illustrates the working principle of this embodiment. This mode is used to recover the heat from indoor stale air to heat outdoor fresh air, or to recover the cold energy from indoor stale air to cool outdoor fresh air. It is applicable to scenarios with large indoor-outdoor temperature differences in winter or summer, such as winter when it is cold outdoors and hot indoors, or summer when it is hot outdoors and cold indoors. In this mode, bypass valve 6 blocks the second return air inlet 53b and the bypass passage, while the fresh air fan 2 and exhaust fan 3 remain operational.

[0074] like Figure 7 and Figure 8 As shown, outdoor fresh air enters the air intake component 41 and air intake zone R71 through air intake 12. After exchanging heat with the polluted indoor return air through heat exchanger 7, it enters the fresh air zone R73, fresh air fan 2, and fresh air component 51, and is then delivered into the room through fresh air inlet 13. Polluted indoor return air enters the return air component 53 and return air zone R74 through return air inlet 14. After exchanging heat with outdoor fresh air through heat exchanger 7, it enters the exhaust air zone R72, exhaust fan 3, and exhaust component 43, and is then discharged to the outside through exhaust outlet 15.

[0075] During this process, heat exchanger 7 uses the heat from the indoor return air to heat the outdoor fresh air, or uses the cold air from the indoor return air to cool the outdoor fresh air, saving heating or cooling energy. However, since the bidirectional airflow passes through heat exchanger 7 via both the fresh air duct and the exhaust air duct, the airflow resistance is high, resulting in high power consumption and high energy consumption for the fresh air fan 2 and the exhaust fan 3.

[0076] The following example, using a bypass mode, illustrates the working principle of this embodiment. This mode is used to introduce fresh outdoor air and exhaust stale indoor air without heat exchange. It is applicable to scenarios where the outdoor air is more comfortable than the indoor air, such as in spring and autumn when the temperature difference between indoors and outdoors is small, or in summer nights when the outdoor temperature is lower than the indoor temperature. In this mode, the bypass valve 6 blocks the third return air vent 53c and the exhaust duct, while the fresh air fan 2 and the exhaust fan 3 remain operational.

[0077] Outdoor fresh air enters the air intake component 41 and air intake zone R71 through air inlet 12, passes through heat exchanger 7 into fresh air zone R73, fresh air fan 2 and fresh air component 51, and is delivered into the room through fresh air outlet 13. Stale indoor return air enters the return air component 53 and bypass room R6 through return air outlet 14, passes through exhaust zone R72, exhaust fan 3 and exhaust component 43, and is discharged to the outside through exhaust outlet 15.

[0078] During this process, fresh outdoor air is introduced into the room, and indoor return air is exhausted to the outside through a bypass channel. Because the bypass channel does not pass through the heat exchanger 7, the airflow resistance is small, and the power and energy consumption of the exhaust fan 3 are lower than those under heat exchange conditions.

[0079] In summary, the improved duct structure of this utility model provides a fresh air exchanger that divides the fresh air exchanger into multiple installation areas through an integrally molded inner and outer cavity, which is beneficial for mass production. Simultaneously, placing the fan in the middle of the exchanger ensures that the center of gravity of the exchanger is close to the structural axis, preventing the center of gravity from shifting to one side when the fans are on the same side, thus avoiding deformation after hoisting due to this imbalance. The fan's placement within the integrally molded cavity achieves both zone isolation and allows for quick disassembly and maintenance along with the cavity.

[0080] It should be noted that the above embodiments are merely illustrative examples, and the technical solutions of each embodiment can be combined, all of which are within the protection scope of this utility model.

[0081] The terms "far end", "near end", "upper", "lower", "horizontal", "vertical", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0083] The above provides a detailed description of an improved air duct structure fresh air exchanger provided by this utility model. Any obvious modifications made by those skilled in the art without departing from the essential content of this utility model will constitute an infringement of the patent rights of this utility model and will incur corresponding legal liability.

Claims

1. A fresh air exchanger with an improved duct structure, characterized in that... It includes a chassis, a fresh air fan, an exhaust fan, an outer cavity, an inner cavity, and a heat exchanger; among which, The outer cavity is a one-piece multi-cavity structure, including an air inlet component, an exhaust volute, and an exhaust component. The exhaust volute is disposed between the air inlet component and the exhaust component. The exhaust fan is disposed in the exhaust volute. The inner cavity is a one-piece molded multi-cavity structure, including a fresh air component, a fresh air volute, and a return air component. The fresh air volute is disposed between the fresh air component and the return air component. The fresh air fan is disposed in the fresh air volute. The outer cavity is located on the outdoor side inside the chassis, the inner cavity is located on the indoor side inside the chassis, and the heat exchanger is located between the outer cavity and the inner cavity.

2. The fresh air exchanger with improved duct structure as described in claim 1, characterized in that... The air intake component includes an air intake base plate, an air intake wall plate, an air intake top plate, and an air intake ramp; wherein... The air inlet bottom plate and the air inlet wall plate are flat plate structures, while the air inlet top plate and the air inlet inclined plate are plate structures with spatial curved surfaces. The Z-direction proximal end of the air inlet wall panel contacts the X-direction distal end of the air inlet base plate, the Z-direction distal end of the air inlet wall panel contacts the X-direction distal end of the air inlet top plate, the X-direction proximal end of the air inlet top plate contacts the Z-direction distal end of the air inlet inclined plate, and the Z-direction proximal end of the air inlet inclined plate contacts the X-direction proximal end of the air inlet base plate.

3. The fresh air exchanger with improved duct structure as described in claim 2, characterized in that... The exhaust volute includes an exhaust volute bottom plate, an exhaust volute back plate, and an exhaust volute curved plate; wherein... The bottom plate of the exhaust volute is a flat plate structure, the back plate of the exhaust volute is an annular plate structure, and the curved plate of the exhaust volute is a bent plate structure with the bending axis parallel to the Y direction. The Z-direction proximal end of the exhaust volute curved plate contacts the X-direction distal end of the exhaust volute bottom plate; the exhaust volute back plate is arranged along the Z-direction and contacts the Y-direction proximal end of the exhaust volute curved plate, and the Z-direction proximal end of the exhaust volute back plate contacts the exhaust volute bottom plate.

4. The fresh air exchanger with improved duct structure as described in claim 3, characterized in that... The exhaust system includes an exhaust base plate, an exhaust back plate, and an exhaust top plate; wherein... The exhaust bottom plate is a flat plate structure, and the exhaust back plate and the exhaust top plate are plate structures with spatial curved surfaces; The Z-direction proximal end of the exhaust back panel contacts the Y-direction distal end of the exhaust bottom panel, and the Z-direction distal end contacts the Y-direction distal end of the exhaust top panel.

5. The fresh air exchanger with improved duct structure as described in claim 4, characterized in that: The near end of the air inlet base plate in the X direction contacts the far end of the air exhaust volute base plate in the X direction; the near ends of the air inlet top plate and the air inlet inclined plate in the X direction both contact the far end of the air exhaust volute curved plate in the X direction; the hollow channels of the air inlet component and the air exhaust volute are not connected. The far end of the exhaust base plate in the X direction contacts the near end of the exhaust volute base plate in the X direction; the far end of the exhaust top plate in the X direction contacts the near end of the exhaust volute curved plate and the exhaust volute back plate in the X direction; the hollow channel of the exhaust component and the exhaust volute is connected.

6. The fresh air exchanger with improved duct structure as described in claim 1, characterized in that... The fresh air component includes a fresh air base plate and a fresh air back plate; wherein... The fresh air base plate is a curved plate structure with the bending axis parallel to the Y direction and the opening facing the opposite direction of the X direction; the fresh air back plate is a plate structure with a spatial curved surface, set along the Z direction, and in contact with the near end of the fresh air base plate in the Y direction.

7. The fresh air exchanger with improved duct structure as described in claim 6, characterized in that... The fresh air volute includes a fresh air volute base plate, a fresh air volute back plate, and a fresh air volute curved plate; wherein... The bottom plate of the fresh air volute is a flat plate structure, the back plate of the fresh air volute is a ring plate structure, and the curved plate of the fresh air volute is a bent plate structure with the bending axis parallel to the Y direction. The Z-direction proximal end of the fresh air volute curved plate contacts the X-direction proximal end of the fresh air volute bottom plate; the fresh air volute back plate is arranged along the Z-direction and contacts the Y-direction distal end of the fresh air volute curved plate; the Z-direction proximal end of the fresh air volute back plate contacts the fresh air volute bottom plate.

8. The fresh air exchanger with improved duct structure as described in claim 7, characterized in that... The return air component includes a return air baffle, a return air wall panel, a return air ceiling panel, and a return air inclined plate; wherein... The return air baffle and the return air wall panel are plate structures with openings, both arranged along the Z direction; the return air top plate and the return air inclined plate are plate structures with spatial curved surfaces; the return air top plate is arranged along the XY plane direction, and the return air inclined plate is arranged along the Z direction. The near end of the return air inclined plate in the X direction contacts the far end of the return air baffle in the X direction, and the far end in the Z direction contacts the far end of the return air top plate in the X direction; the far end in the Z direction of the return air baffle contacts the near end in the Z direction of the return air top plate; the far end in the Z direction of the return air wall panel contacts the near end in the X direction of the return air top plate; the near end in the X direction of the return air baffle and the near end in the Y direction of the return air wall panel are in contact with each other.

9. The fresh air exchanger with improved duct structure as described in claim 8, characterized in that: The Z-direction proximal end of the return air inclined plate contacts the X-direction proximal end of the fresh air volute bottom plate; the X-direction distal ends of the return air inclined plate and the return air top plate both contact the X-direction proximal end of the fresh air volute curved plate; the hollow channels of the return air component and the fresh air volute are not connected. The near end of the fresh air base plate in the X direction contacts the far end of the fresh air volute base plate and the curved plate of the fresh air volute in the X direction; the hollow channel of the fresh air component and the fresh air volute is connected.

10. The fresh air exchanger with improved duct structure as described in claim 9, characterized in that... It also includes a bypass valve, a controller, and a bypass baffle; among which, The bypass valve includes a valve plate and a servo motor; the valve plate is disposed along the Z-direction between the return air baffle and the return air wall panel, and its Y-direction proximal end is rotatably connected to the Y-direction proximal end of the return air wall panel; the servo motor is designed to drive the valve plate to rotate. The controller is connected to the servo motor and is designed to control the rotational position of the valve plate. The shape of the bypass partition is adapted to the return air wall panel and the housing; the return air wall panel, the housing and the bypass partition are designed to surround and form a hollow channel structure.

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