Air duct assembly and dehumidification fresh air ventilator with same

Abstract

The utility model provides an air duct assembly and a dehumidification fresh air machine with the air duct assembly. The air duct assembly comprises a shell, an air feeder and an airflow conversion component. The shell is provided with an air inlet and an air supply outlet, and the air feeder is arranged at the air supply outlet; the airflow conversion part is arranged in the shell and located on an airflow flowing path between the air inlet and the air feeder; the airflow conversion part is provided with a first air opening and a second air opening, the airflow conversion part can selectively open the first air opening or the second air opening so that a purification air channel can be formed among the air inlet, the first air opening and the air feeder, a dehumidification air channel can be formed among the air inlet, the second air opening and the air feeder, and a purification part is arranged on an airflow flowing path of the purification air channel; and an evaporator is arranged on an airflow flowing path of the dehumidification air duct. Due to the arrangement of the airflow conversion component, when external air only needs to be purified, airflow can directly pass through the purification component and does not need to flow through the evaporator, and air duct resistance is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of dehumidifying fresh air units, specifically relating to an air duct assembly and a dehumidifying fresh air unit having the air duct assembly. Background Technology

[0002] Conventional ceiling-mounted unidirectional flow dehumidifiers and fresh air systems are limited by the thickness of the unit, resulting in a small evaporator frontal area and high resistance. This leads to low overall air volume, low dehumidification capacity, and low external static pressure, making them unsuitable for the high-efficiency purification, large fresh air volume, and efficient dehumidification requirements of modern home environments. In conventional ceiling-mounted dehumidifiers and fresh air systems, the evaporator component occupies the entire thickness of the unit. When introducing outside air, the airflow typically needs to pass through the evaporator before being drawn into the room by the fan. When only purification is required for fresh or return air, it is impossible to bypass the evaporator, resulting in high internal airflow resistance, high power consumption, and energy inefficiency. Utility Model Content

[0003] This utility model provides an air duct assembly and a dehumidifying fresh air unit with the air duct assembly, which can solve the technical problem that when fresh air or return air only needs to be purified, it is impossible to make the fresh air or return air flow through the evaporator without the fresh air or return air flowing through the evaporator, resulting in high power consumption of the whole unit.

[0004] This utility model provides an air duct assembly and a dehumidifying fresh air unit having the air duct assembly. The air duct assembly includes a housing, a blower, and an airflow conversion component.

[0005] The housing is provided with an air inlet and an air outlet, and the blower is located at the air outlet.

[0006] The airflow conversion component is disposed in the housing and is located on the airflow path between the air inlet and the blower;

[0007] The airflow conversion component has a first air outlet and a second air outlet. The airflow conversion component can selectively open the first air outlet or the second air outlet to form a purification air duct between the air inlet, the first air outlet and the blower, and a dehumidification air duct between the air inlet, the second air outlet and the blower. A purification component is provided on the airflow path of the purification air duct, and an evaporator is provided on the airflow path of the dehumidification air duct.

[0008] In some embodiments, the airflow conversion component includes a baffle and a first air valve, with the first air outlet and the second air outlet disposed on the baffle, the first air outlet facing the blower and the second air outlet facing the evaporator, and the first air valve rotatably disposed on the baffle for opening the first air outlet or the second air outlet.

[0009] In some embodiments, the first air valve includes a first motor, a rotating shaft, a first baffle, and a second baffle. The output end of the first motor is connected to the rotating shaft, and the sidewalls of the first baffle and the second baffle are respectively connected to the rotating shaft. The first baffle is used to open or close the first air vent, and the second baffle is used to open or close the second air vent.

[0010] In some embodiments, the first baffle and the second baffle are arranged at an angle with the cross-section of the airflow conversion component as the projection plane, so that the second air outlet is opened when the rotating shaft drives the first baffle to close the first air outlet, or the first air outlet is opened when the rotating shaft drives the second baffle to close the second air outlet.

[0011] In some embodiments, the airflow conversion component further includes a surrounding plate having an opening, the bottom of the surrounding plate being connected to the housing, the opening being connected to the partition, a conversion chamber being formed between the housing, the surrounding plate, and the partition, and the second air outlet communicating with the conversion chamber;

[0012] A third air vent is provided on the enclosure panel. The third air vent is positioned opposite to the second air vent and faces the evaporator. The dehumidification duct is formed between the air inlet, the second air vent, the third air vent, and the blower.

[0013] In some embodiments, the enclosure is provided with a guide plate facing the outer wall of the evaporator, and the guide plate guides the airflow at the third air inlet to the windward side of the evaporator.

[0014] In some embodiments, with the cross-section of the housing as the projection plane, the blower and the evaporator are stacked, the blower is positioned above the evaporator, and the leeward side of the evaporator faces the blower.

[0015] In some embodiments, the evaporator is a plate-finned heat exchanger.

[0016] A dehumidifying fresh air unit includes an air duct assembly, which is the air duct assembly described above. The air inlet includes a fresh air inlet and a return air inlet, and a second air valve is provided at both the fresh air inlet and the return air inlet.

[0017] In some embodiments, the second air valve includes an air valve mounting base, a second motor, and an air deflector. The air valve mounting base is installed at the corresponding air outlet, the second motor is installed on the air valve mounting base, and the output shaft of the second motor is connected to the air deflector to open or close the corresponding air outlet.

[0018] The present invention provides an air duct assembly and a dehumidifying fresh air unit having the air duct assembly, which have the following beneficial effects:

[0019] This invention achieves a compact duct system by rationally designing the layout of the housing, blower, and airflow conversion component. The airflow conversion component can flexibly switch between purification and dehumidification ducts according to actual needs, meeting the requirements of different scenarios and improving the applicability and flexibility of the equipment. Through the airflow conversion component, when external air only needs purification, the airflow can pass directly through the purification component without flowing through the evaporator, reducing duct resistance and thus lowering overall power consumption. When dehumidification is required, the airflow conversion component allows the airflow to precisely flow through the evaporator for dehumidification, avoiding unnecessary energy loss and improving the equipment's energy efficiency ratio. This invention's duct system can adapt to the whole-house high-efficiency purification needs of modern home environments. When the introduced external air does not require dehumidification, it can be purified through the purification duct, ensuring indoor air cleanliness. Furthermore, the optimized duct structure helps increase external static pressure, allowing fresh air to be more effectively delivered to every corner of the room, enhancing ventilation. Attached Figure Description

[0020] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] Figure 1 This is a front view schematic diagram of the air duct assembly according to an embodiment of the present utility model;

[0022] Figure 2 This is a top view of the air duct assembly according to an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the airflow conversion component according to an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the first to fourth air outlets in an embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of a purification air duct according to an embodiment of the present utility model;

[0026] Figure 6 This is a schematic diagram of a dehumidification duct according to an embodiment of the present utility model;

[0027] Figure 7 This is a schematic diagram of the first baffle blocking the first air vent in an embodiment of the present utility model;

[0028] Figure 8 This is a schematic diagram of the second baffle blocking the second air vent in an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the second air valve opening the air vent in an embodiment of the present utility model;

[0030] Figure 10 This is a schematic diagram of the second air valve blocking the air outlet in an embodiment of the present utility model.

[0031] Attached Figures: 1-Housing; 101-Air Inlet; 111-Fresh Air Inlet; 112-Return Air Inlet; 102-Supply Air Outlet; 2-Supply Fan; 3-Airflow Conversion Component; 301-First Air Outlet; 302-Second Air Outlet; 303-Third Air Outlet; 304-Fourth Air Outlet; 31-Baffle; 32-First Air Valve; 321-First Motor; 322-Rotating Shaft; 323-First Baffle; 324-Second Baffle; 33-Enclosure; 331-Conversion Chamber; 34-Guide Plate; 41-Purification Air Duct; 42-Dehumidification Air Duct; 5-Purification Component; 6-Evaporator; 7-Second Air Valve; 71-Air Valve Mounting Base; 72-Second Motor; 73-Air Plate. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0033] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" 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. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0034] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used here to describe the spatial positional relationship of a device or feature as shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device as described in the figure. For example, if a device in the figure is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures.

[0035] See also Figures 1 to 6 As shown, according to an embodiment of the present invention, an air duct assembly is provided, which includes a housing 1, a blower 2, and an airflow conversion component 3; the housing 1 is provided with an air inlet 101 and an air outlet 102, and the blower 2 is provided at the air outlet 102; the airflow conversion component 3 is provided in the housing 1, and the airflow conversion component 3 is located on the airflow path between the air inlet 101 and the blower 2; the airflow conversion component 3 has a first air outlet 301 and a second air outlet 302, and the airflow conversion component 3 can selectively open the first air outlet 301 or the second air outlet 302 so that a purification air duct 41 is formed between the air inlet 101, the first air outlet 301 and the blower 2, and a dehumidification air duct 42 is formed between the air inlet 101, the second air outlet 302 and the blower 2; a purification component 5 is provided on the airflow path of the purification air duct 41, and an evaporator 6 is provided on the airflow path of the dehumidification air duct 42.

[0036] Specifically, when external air is introduced into the housing 1, if the external air does not require dehumidification, the airflow conversion component 3 opens the first air vent 301 and closes the second air vent 302. At this time, the air inlet 101, the first air vent 301, and the blower 2 are interconnected. That is, under the action of the blower 2, the external air flows into the purification duct 41, and after being purified by the purification component 5, it is sent into the room. If the external air requires dehumidification, the airflow conversion component 3 opens the second air vent 302 and closes the first air vent 301. At this time, the air inlet 101, the second air vent 302, and the blower 2 are interconnected. That is, under the action of the blower 2, the external air flows into the dehumidification duct 42, and after being dehumidified by the evaporator 6, it is sent into the room. In other embodiments, the position of the purification component 5 can also be adjusted. The purification component 5 is set close to the air inlet 101, so that regardless of whether the external air enters the purification duct 41 or the dehumidification duct 42, it can be purified by the purification component 5.

[0037] In this embodiment, by rationally arranging the layout of the housing 1, the blower 2, and the airflow conversion component 3, the entire duct assembly structure is compact. The airflow conversion component 3 can flexibly switch between the purification duct 41 and the dehumidification duct 42 according to actual needs, meeting the usage requirements of different scenarios and improving the applicability and flexibility of the equipment. Through the setting of the airflow conversion component 3, when external air only needs purification, the airflow can directly pass through the purification component 5 without flowing through the evaporator 6, reducing duct resistance and thus lowering the overall power consumption. When dehumidification is required, the airflow conversion component 3 allows the airflow to precisely flow through the evaporator 6 for dehumidification, avoiding unnecessary energy loss and improving the energy efficiency ratio of the equipment. The duct assembly of this embodiment can adapt to the whole-house high-efficiency purification needs of modern home environments. When the introduced external air does not require dehumidification, it can be purified through the purification duct 41, ensuring the cleanliness of indoor air. Furthermore, the optimized duct structure helps to increase the external static pressure, allowing fresh air to be more effectively delivered to every corner of the room, enhancing ventilation.

[0038] It is worth noting that the external air entering the air inlet 101 in this embodiment can be outdoor fresh air, indoor return air, or a mixture of the two. Both outdoor fresh air and indoor return air can be purified or dehumidified after purification. The purification component 5 specifically includes a filter frame and filter layers. The filter frame is made of lightweight plastic or metal. The filter frame is used to fix multiple layers of filter material. The filter layers include at least a pre-filter and an activated carbon layer. The pre-filter is located on the outermost layer and intercepts large particles such as dust. The activated carbon layer has a honeycomb or granular structure and adsorbs formaldehyde and odors.

[0039] As a specific implementation method, in order to ensure that the introduced air can smoothly enter the housing 1, a fan can be installed at the air inlet 101. The fan draws in the air and sends it into the housing 1. In this embodiment, considering that the air duct assembly is applied to the ceiling-mounted dehumidifying fresh air unit, the overall structure of the dehumidifying fresh air unit is relatively compact. No fan is installed at the air inlet 101. Under the suction of the blower 2, the airflow can be sent into the housing 1 from the air inlet 101.

[0040] See also Figures 1 to 6 As shown, the airflow conversion component 3 includes a partition 31 and a first air valve 32. A first air outlet 301 and a second air outlet 302 are disposed on the partition 31. The first air outlet 301 faces the blower 2, and the second air outlet 302 faces the evaporator 6. The first air valve 32 is rotatably disposed on the partition 31 and is used to open the first air outlet 301 or the second air outlet 302.

[0041] Specifically, along the centerline extension of the air inlet 101, a partition 31 is vertically installed in the housing 1, dividing the housing into two chambers. The air inlet 101 and the air outlet 102 are located on opposite sides of the partition 31. Since the partition 31 has a first air outlet 301 and a second air outlet 302, external air entering the housing 1 from the air inlet 101 can only enter the purification duct 41 through the first air outlet 301 or the dehumidification duct 42 through the second air outlet 302. Because the first air outlet 301 faces the blower 2, the airflow is drawn in by the blower 2 at the first air outlet 301. The second air outlet 302 faces the evaporator 6, and the airflow at the second air outlet 302 flows through the evaporator 6 before being delivered into the room by the blower 2. In this embodiment, the opening states of the first air vent 301 and the second air vent 302 are opposite. That is, in the same state, the airflow can only pass through one air vent. The partition 31 is provided with a first air valve 32, which can open the first air vent 301 or the second air vent 302.

[0042] In this embodiment, the partition 31 divides the housing 1 into two chambers, with the air inlet 101 and the air outlet 102 located on both sides of the partition 31. This arrangement can effectively organize the airflow path and prevent the airflow from flowing randomly in the housing 1, thereby reducing the airflow resistance. The first air outlet 301 and the second air outlet 302 face the blower 2 and the evaporator 6 respectively, ensuring that the airflow can be directly drawn into the blower 2 or flow through the evaporator 6 after entering the airflow duct, avoiding the airflow from turning back or detouring multiple times in the housing 1, and further reducing the resistance. This embodiment reduces the resistance by optimizing the airflow duct structure. The first air valve 32 is rotatably mounted on the partition 31, enabling flexible control of the opening and closing states of the first air outlet 301 and the second air outlet 302. Through mechanical rotation, the air valve can precisely switch the airflow path, ensuring that airflow can only enter the corresponding air duct (purification air duct 41 or dehumidification air duct 42) through one air outlet. This configuration avoids airflow leakage or mixing caused by improper placement or inflexible switching of the air valve in traditional air ducts, improving the reliability and accuracy of air duct switching. In this embodiment, by setting the partition 31 and the first air valve 32, the airflow can directly pass through the purification air duct 41 when external air does not require dehumidification, avoiding unnecessary energy loss and reducing the overall power consumption of the unit. When dehumidification is required, the airflow can precisely flow through the evaporator 6, reducing energy waste caused by unreasonable air duct settings, improving the energy efficiency ratio of the equipment, and enabling the air duct components to flexibly adapt to different usage scenarios. Whether purification or dehumidification is required, the corresponding functions can be achieved through simple air valve switching, meeting the diverse needs of users.

[0043] See also Figures 1 to 8As shown, the first air valve 32 includes a first motor 321, a rotating shaft 322, a first baffle 323, and a second baffle 324. The output end of the first motor 321 is connected to the rotating shaft 322. The side walls of the first baffle 323 and the second baffle 324 are respectively connected to the rotating shaft 322. The first baffle 323 is used to open or close the first air vent 301, and the second baffle 324 is used to open or close the second air vent 302.

[0044] Specifically, the first motor 321 is embedded in the partition 31, and the axis of the rotating shaft 322 is parallel to the length direction of the partition 31. When the first motor 321 rotates, it drives the first baffle 323 and the second baffle 324 to rotate simultaneously. When the second baffle 324 blocks the second air vent 302, the first air vent 301 is open, and the airflow cannot flow out from the second air vent 302, but instead flows out from the first air vent 301. That is, the airflow flows in the purification duct 41, and the airflow bypasses the evaporator 6 and is sent into the room. Conversely, when the first baffle 323 blocks the first air vent 301, the second air vent 302 is open, and the airflow flows in the dehumidification duct 42. The airflow passes through the evaporator 6 and is sent into the room.

[0045] In this embodiment, the first baffle 323 and the second baffle 324, connected to the rotating shaft 322, enable precise control of the first air vent 301 and the second air vent 302. When the first baffle 323 closes the first air vent 301, the second baffle 324 automatically opens the second air vent 302, and vice versa. This arrangement ensures that airflow can only enter the corresponding air duct (purification air duct 41 or dehumidification air duct 42) through one air vent, avoiding leakage or mixing of airflow at the airflow conversion component 3. Driven by the first motor 321, the first baffle 323 and the second baffle 324 can be flexibly switched to adapt to different usage scenarios. When purification is required, the airflow passes directly through the purification air duct 41; when dehumidification is required, the airflow passes through the dehumidification air duct 42. This flexibility allows the equipment to quickly adjust its operating mode according to actual needs. Furthermore, the baffle design effectively prevents airflow from leaking through unintended paths, improving the air duct's sealing performance to some extent. This design not only enhances the equipment's reliability but also reduces energy consumption caused by airflow leakage. Moreover, the integrated design of the baffle and the rotating shaft 322 makes the entire air valve assembly compact, reducing the need for additional space. This design is particularly suitable for modern home environments where space utilization is crucial.

[0046] As a specific implementation, in order to make the overall structure more compact, the first air valve 32 also includes a valve mounting seat. The valve mounting seat is embedded in the first air outlet 301. The rotating shaft 322 is located at the bottom of the valve mounting seat. When the first baffle 323 is rotated to the vertical position, the first baffle 323 is rotated to the first air outlet 301, and the first air outlet 301 is blocked. Meanwhile, the second baffle 324 is away from the second air outlet 302, and the second air outlet 302 is open. Conversely, the same applies. In this way, airflow can be achieved by passing through only one air outlet.

[0047] See also Figures 1 to 8 As shown, with the cross-section of the airflow conversion component 3 as the projection plane, the first baffle 323 and the second baffle 324 are arranged at an angle so that when the rotating shaft 322 drives the first baffle 323 to close the first air vent 301, the second air vent 302 is opened, or when the rotating shaft 322 drives the second baffle 324 to close the second air vent 302, the first air vent 301 is opened.

[0048] Specifically, in this embodiment, the included angle between the first baffle 323 and the second baffle 324 is 90°, and preferably the first air outlet 301 is located above the second air outlet 302. The valve mounting seat is installed at the first air outlet 301, and the rotating shaft 322 is located at the interval between the first baffle 323 and the second baffle 324. In this way, when the motor is working, the rotating shaft 322 drives the first baffle 323 to block the first air outlet 301, while the second baffle 324 opens the second air outlet 302. Moreover, at this time, the second baffle 324 is horizontal, which can concentrate the airflow into the dehumidification duct 42. Conversely, when the rotation drives the second baffle 324 to be in a vertical state to block the second air outlet 302, the first baffle 323 is in a horizontal state to open the first air outlet 301, and the first baffle 323 concentrates the airflow into the dehumidification duct 42.

[0049] In this embodiment, precise control of the first air vent 301 and the second air vent 302 is achieved by setting the included angle (preferably 90°) between the first baffle 323 and the second baffle 324. When the rotating shaft 322 drives the first baffle 323 to close the first air vent 301, the second baffle 324 automatically opens the second air vent 302, and vice versa. This arrangement ensures that airflow can only enter the corresponding air duct (purification air duct 41 or dehumidification air duct 42) through one air vent, avoiding airflow leakage or mixing. When the second baffle 324 is in a horizontal state, it can concentrate the airflow into the dehumidification air duct 42, ensuring that the airflow can fully flow through the evaporator 6 and improve dehumidification efficiency. Similarly, when the first baffle 323 is in a horizontal state, it can concentrate the airflow into the purification duct 41, thereby improving the purification efficiency. The arrangement of the first baffle 323 and the second baffle 324 can reduce the resistance in the duct. When the first baffle 323 is open, the airflow directly enters the purification duct 41, bypassing the evaporator 6, thus reducing unnecessary energy loss. When the second baffle 324 is open, the airflow passes through the evaporator 6 for dehumidification, ensuring dehumidification efficiency.

[0050] See also Figures 1 to 8 As shown, the airflow conversion component 3 also includes a surrounding plate 33, which has an opening. The bottom of the surrounding plate 33 is connected to the housing 1, and the opening is connected to the partition plate 31. A conversion chamber 331 is formed between the housing 1, the surrounding plate 33, and the partition plate 31. The second air outlet 302 is connected to the conversion chamber 331. A third air outlet 303 is provided on the surrounding plate 33. The third air outlet 303 is arranged opposite to the second air outlet 302 and faces the evaporator 6. A dehumidification duct 42 is formed between the air inlet 101, the second air outlet 302, the third air outlet 303, and the blower 2.

[0051] Specifically, in this embodiment, with only the partition 31, airflow can be guided to different air ducts. To further improve the concentrated guidance of airflow, this embodiment also includes a surrounding plate 33. The surrounding plate 33 works in conjunction with the housing 1 and the partition 31. The opening on the surrounding plate 33 provides a space for the second air outlet 302 to connect with the conversion chamber 331, thus forming a conversion chamber 331 with the airflow conversion component 3. The airflow to be flowed through the dehumidification channel will first flow into the conversion chamber 331 and then be concentrated and delivered to the windward side of the evaporator 6 through the third air outlet 303, preventing some airflow from flowing into the purification air duct 41, i.e., not flowing through the evaporator 6 and being directly sucked in by the blower 2. When the first air outlet 301 is open, the airflow passes through the first air outlet 301 normally. When the second air outlet 302 is open, the airflow will first flow into the conversion chamber 331 and then flow out from the third air outlet 303, passing through the windward side of the evaporator 6.

[0052] In this embodiment, the enclosure 33 cooperates with the housing 1 and the partition 31 to form a conversion chamber 331. This allows the airflow that needs to pass through the dehumidification duct 42 to first flow into the conversion chamber 331, and then be concentrated and delivered to the windward side of the evaporator 6 through the third air outlet 303. This arrangement avoids some airflow directly flowing into the purification duct 41, ensuring that the airflow can fully pass through the evaporator 6, thus improving dehumidification efficiency. The enclosure 33 further optimizes the duct structure, making the airflow path clearer and more orderly. Guided by the enclosure 33, the airflow can flow along a predetermined path, reducing turbulence and resistance within the duct, improving the overall performance of the equipment. Furthermore, the enclosure 33 ensures that the airflow can accurately flow through the evaporator 6 or purification component 5 when needed, avoiding equipment performance degradation or malfunctions caused by chaotic airflow paths, thus improving the reliability and stability of the equipment.

[0053] In other embodiments, without the enclosure 33, the partition 31 can be positioned as close as possible to the blower 2 and the evaporator 6, that is, the flow path between the airflow and the blower 2 and the evaporator 6 is shorter, thus avoiding the airflow mixing in the two air ducts.

[0054] In one specific implementation, the first baffle 323 and the second baffle 324 are vertically connected in this embodiment. After the enclosure 33 is installed, in order to enable the first baffle 323 and the second baffle 324 to rotate smoothly and maintain the sealing of the conversion chamber 331, a fourth air vent 304 is provided on the top of the enclosure 33. The fourth air vent 304 provides a clearance position for the first baffle 323 and the second baffle 324. Specifically, when the first baffle 323 opens the first air vent 301, the first baffle 323 is located in the fourth air vent 304, and the second baffle 324 is located in the second air vent 302. The airflow does not flow into the conversion chamber 331, but passes through the first air vent 301. When the first baffle 323 blocks the first air vent 301, the second baffle 324 is located in the fourth air vent 304. The second baffle 324 opens the second air vent 302, and the airflow flows into the conversion chamber 331 through the second air vent 302 and flows out from the third air vent 303.

[0055] See also Figures 1 to 8 As shown, with the cross-section of the shell 1 as the projection plane, the blower 2 and the evaporator 6 are stacked, with the blower 2 positioned above the evaporator 6 and the leeward side of the evaporator 6 facing the blower 2.

[0056] In this embodiment, for a conventional dehumidifying fresh air unit, the evaporator 6 is installed at an angle in the housing 1, which means that the airflow must pass through the evaporator 6 to be delivered into the room. Considering the compactness of the overall structure, this embodiment changes the setting position of the evaporator 6, placing the evaporator 6 below the blower 2. After the position of the evaporator 6 is changed, combined with the setting of the airflow conversion component 3, it is more conducive to the flow of external air into the purification air duct 41 or the dehumidifying air duct 42.

[0057] In this embodiment, by placing the evaporator 6 below the blower 2, the traditional inclined installation method is changed, allowing airflow to directly enter the purification duct 41 or dehumidification duct 42 without being forced to flow through the evaporator 6. This arrangement reduces the resistance of airflow passing through the evaporator 6 and improves air delivery efficiency. The stacked arrangement of the blower 2 and the evaporator 6 makes the entire equipment structure more compact and reduces the space requirement.

[0058] It is worth noting that in this embodiment, the blower 2 and the evaporator 6 are preferably stacked. In other embodiments, as long as the airflow conversion component 3 can make the airflow pass through the evaporator 6 or not pass through the evaporator 6, it is acceptable. For example, the evaporator 6 is inclined, and there is still a certain distance between the top of the evaporator 6 and the shell 1. After the airflow flows out from the first air outlet 301, it is directly sucked in by the blower 2.

[0059] See also Figures 1 to 8 As shown, a guide plate 34 is provided on the outer wall of the enclosure 33 facing the evaporator 6. The guide plate 34 guides the airflow at the third air outlet 303 to the windward side of the evaporator 6.

[0060] In this embodiment, the blower 2 and the evaporator 6 are stacked, that is, the windward side of the evaporator 6 faces the bottom of the housing 1, and the airflow conversion component 3 is located on one side of the evaporator 6 (the right side in the figure). After the airflow flows out from the third air outlet 303, the airflow is equivalent to being sent to the windward side of the evaporator 6 from the side. In order to concentrate the airflow into the windward side of the evaporator 6, a guide plate 34 is provided on the outer wall of the enclosure 33 facing the evaporator 6. The guide plate 34 concentrates and guides the airflow to the windward side of the evaporator 6 on the one hand, and on the other hand, prevents the airflow from flowing into the purification air duct 41 through the gap between the enclosure 33 and the evaporator 6.

[0061] In this embodiment, the guide plate 34 can concentrate and guide the airflow from the third air outlet 303 to the windward surface of the evaporator 6, ensuring that the airflow can fully contact the evaporator 6, thereby improving dehumidification efficiency. This concentrated airflow avoids airflow dispersion and ensures that the airflow can flow evenly through the evaporator 6, improving the dehumidification effect. Since the windward surface of the evaporator 6 faces the bottom of the housing 1, and the airflow conversion component 3 is located on one side of the evaporator 6, the airflow needs to change direction after flowing out of the third air outlet 303 to reach the windward surface of the evaporator 6. The guide plate 34 can effectively change the airflow direction, making it more consistent with the windward direction of the evaporator 6, thus optimizing the airflow path. Moreover, the guide plate 34 can prevent the airflow from flowing into the purification air duct 41 through the gap between the enclosure 33 and the evaporator 6, avoiding unnecessary energy loss. This setting ensures that the airflow can only flow along a predetermined path, improving the sealing and reliability of the equipment.

[0062] See also Figures 1 to 8 As shown, evaporator 6 is a plate finned heat exchanger.

[0063] In this embodiment, compared to conventional L-shaped and I-shaped finned evaporators, the plate finned heat exchanger has a smaller frontal area and higher resistance, and the heat exchange efficiency of the rear rows is low when there are many rows (for multi-row heat exchangers, the heat exchange temperature difference decreases along the airflow direction, and the heat exchange capacity also decreases; that is, the heat exchange efficiency of the rear rows is lower. When setting up a three-row heat exchanger, the capacity of the middle row is about 1 / 2 of the first row, and the capacity of the last row is about 1 / 3 of the first row. The lower the wind speed, the worse the heat exchange effect of the rear rows). In this embodiment, the plate finned heat exchanger has a smaller volume, and the entire plane of the leeward side of the evaporator 6 faces the blower 2, which is more conducive to the dehumidified airflow being drawn into the blower 2.

[0064] In one specific implementation, the purification component 5 is located between the airflow conversion component 3 and the air inlet 101, so that regardless of whether the external air is fresh air or return air, and regardless of whether it flows into the purification air duct 41 or the dehumidification air duct 42, the external air can be purified before being sent in.

[0065] See also Figures 1 to 10 As shown, a dehumidifying fresh air unit includes a duct assembly, which is the aforementioned duct assembly. The air inlet 101 includes a fresh air inlet 111 and a return air inlet 112. A second air valve 7 is provided at both the fresh air inlet 111 and the return air inlet 112.

[0066] In this embodiment, the dehumidifying fresh air unit is a ceiling-mounted dehumidifying fresh air unit. This unit integrates the introduction of outdoor fresh air and the dehumidification of indoor return air into a single unit. When the dehumidifying fresh air unit in this embodiment uses the aforementioned duct components, it can operate in multiple modes depending on whether dehumidification is required. The first mode is the fresh air purification + dehumidification mode. In this mode, the second air valve 7 at the return air inlet 112 closes the return air inlet 112, and the second air valve 7 at the fresh air inlet 111 opens the fresh air inlet 111. The first baffle 323 blocks the first air outlet 301, and the second baffle 324 opens the second air outlet 302. After passing through the purification component 5, the fresh air flows into the conversion chamber 331 and exits from the third air outlet 303. After being dehumidified by the evaporator 6, the fresh air is sent into the room by the blower 2. In this mode, the fresh air needs to be both purified and dehumidified.

[0067] The second mode is the internal circulation purification + dehumidification mode. In this mode, the second air valve 7 at the return air inlet 112 opens the return air inlet 112, the second air valve 7 at the fresh air inlet 111 closes the fresh air inlet 111, the first baffle 323 blocks the first air outlet 301, the second baffle 324 opens the second air outlet 302, the return air flows into the conversion chamber 331 after passing through the purification component 5 and flows out from the third air outlet 303, the fresh air flows through the evaporator 6 for dehumidification and is then sent into the room by the blower 2. In this mode, the return air needs to be both purified and dehumidified.

[0068] The third mode is the mixed air purification + dehumidification mode. In this mode, the second air valve 7 at the return air inlet 112 opens the return air inlet 112, the second air valve 7 at the fresh air inlet 111 opens the fresh air inlet 111, the first baffle 323 blocks the first air outlet 301, and the second baffle 324 opens the second air outlet 302. The return air flows into the conversion chamber 331 after passing through the purification component 5, and the fresh air flows into the conversion chamber 331 after passing through the purification component 5. The fresh air and return air mix in the conversion chamber 331 and flow out from the third air outlet 303. The mixed airflow is dehumidified by the evaporator 6 and then sent into the room by the blower 2. In this mode, both the fresh air and return air need to be purified and dehumidified.

[0069] The fourth mode is the fresh air purification mode: the second air valve 7 at the return air inlet 112 closes the return air inlet 112, the second air valve 7 at the fresh air inlet 111 opens the fresh air inlet 111, the first baffle 323 opens the first air outlet 301, the second baffle 324 closes the second air outlet 302, and the fresh air flows into the first air outlet 301 after passing through the purification component 5. The blower 2 sends the airflow from the first air outlet 301 into the room.

[0070] The fifth mode is the internal circulation purification mode: the second air valve 7 at the return air inlet 112 opens the return air inlet 112, the second air valve 7 at the fresh air inlet 111 closes the fresh air inlet 111, the first baffle 323 opens the first air outlet 301, the second baffle 324 closes the second air outlet 302, the return air flows into the first air outlet 301 after passing through the purification component 5, and the blower 2 sends the airflow at the first air outlet 301 into the room.

[0071] The sixth mode is the mixed air purification mode: the second air valve 7 at the return air inlet 112 opens the return air inlet 112, the second air valve 7 at the fresh air inlet 111 opens the fresh air inlet 111, the first baffle 323 opens the first air outlet 301, the second baffle 324 closes the second air outlet 302, and the return air and fresh air flow into the first air outlet 301 after passing through the purification component 5. The blower 2 sends the airflow at the first air outlet 301 into the room.

[0072] See also Figures 1 to 8 As shown, the second air valve component 7 includes an air valve mounting base 71, a second motor 72, and an air plate 73. The air valve mounting base 71 is installed at the corresponding air outlet, the second motor 72 is installed on the air valve mounting base 71, and the output shaft of the second motor 72 is connected to the air plate 73 so that the air plate 73 opens or closes the corresponding air outlet.

[0073] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0074] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A duct assembly, characterized in that, include: The housing (1), the blower (2), and the airflow conversion component (3); The housing (1) is provided with an air inlet (101) and an air outlet (102), and the blower (2) is located at the air outlet (102); The airflow conversion component (3) is disposed in the housing (1), and the airflow conversion component (3) is located on the airflow path between the air inlet (101) and the blower (2); The airflow conversion component (3) has a first air outlet (301) and a second air outlet (302). The airflow conversion component (3) can selectively open the first air outlet (301) or the second air outlet (302) to form a purification air duct (41) between the air inlet (101), the first air outlet (301) and the blower (2), and a dehumidification air duct (42) between the air inlet (101), the second air outlet (302) and the blower (2). A purification component (5) is provided on the airflow path of the purification air duct (41), and an evaporator (6) is provided on the airflow path of the dehumidification air duct (42).

2. The air duct assembly according to claim 1, characterized in that, The airflow conversion component (3) includes a partition (31) and a first air valve (32). The first air outlet (301) and the second air outlet (302) are disposed on the partition (31). The first air outlet (301) faces the blower (2), and the second air outlet (302) faces the evaporator (6). The first air valve (32) is rotatably disposed on the partition (31) and is used to open the first air outlet (301) or the second air outlet (302).

3. The air duct assembly according to claim 2, characterized in that, The first air valve (32) includes a first motor (321), a rotating shaft (322), a first baffle (323), and a second baffle (324). The output end of the first motor (321) is connected to the rotating shaft (322). The sidewalls of the first baffle (323) and the second baffle (324) are respectively connected to the rotating shaft (322). The first baffle (323) is used to open or close the first air vent (301), and the second baffle (324) is used to open or close the second air vent (302).

4. The air duct assembly according to claim 3, characterized in that, With the cross-section of the airflow conversion component (3) as the projection plane, the first baffle (323) and the second baffle (324) are arranged at an angle so that when the rotating shaft (322) drives the first baffle (323) to close the first air vent (301), the second air vent (302) is opened, or when the rotating shaft (322) drives the second baffle (324) to close the second air vent (302), the first air vent (301) is opened.

5. The air duct assembly according to claim 2, characterized in that, The airflow conversion component (3) further includes a surrounding plate (33), the surrounding plate (33) having an opening, the bottom of the surrounding plate (33) being connected to the housing (1), the opening being connected to the partition plate (31), a conversion chamber (331) being formed between the housing (1), the surrounding plate (33) and the partition plate (31), and the second air outlet (302) communicating with the conversion chamber (331); A third air vent (303) is provided on the enclosure (33). The third air vent (303) is arranged opposite to the second air vent (302). The third air vent (303) faces the evaporator (6). The dehumidification duct (42) is formed between the air inlet (101), the second air vent (302), the third air vent (303) and the blower (2).

6. The air duct assembly according to claim 5, characterized in that, The enclosure (33) is provided with a guide plate (34) facing the outer wall of the evaporator (6), and the guide plate (34) guides the airflow at the third air outlet (303) to the windward side of the evaporator (6).

7. The air duct assembly according to claim 1, characterized in that, With the cross-section of the housing (1) as the projection plane, the blower (2) and the evaporator (6) are stacked, the blower (2) is located above the evaporator (6), and the leeward side of the evaporator (6) faces the blower (2).

8. The air duct assembly according to claim 7, characterized in that, The evaporator (6) is a plate finned heat exchanger.

9. A dehumidifying fresh air unit, the dehumidifying fresh air unit comprising an air duct assembly, characterized in that, The air duct assembly is the air duct assembly according to any one of claims 1 to 8, and the air inlet (101) includes a fresh air inlet (111) and a return air inlet (112), and a second air valve (7) is provided at both the fresh air inlet (111) and the return air inlet (112).

10. The dehumidifying fresh air unit according to claim 9, characterized in that, The second air valve component (7) includes an air valve mounting base (71), a second motor (72), and an air plate (73). The air valve mounting base (71) is installed at the corresponding air outlet. The second motor (72) is installed on the air valve mounting base (71). The output shaft of the second motor (72) is connected to the air plate (73) so that the air plate (73) can open or close the corresponding air outlet.

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