Air duct assembly and air conditioning device

Abstract

The present disclosure relates to an air duct assembly and an air conditioning device, the air duct assembly comprising a housing, at least one centrifugal fan and at least two communication passages, the housing being provided with a first air outlet opening downward and a second air outlet opening forward; the centrifugal fan being provided with an air inlet and an air outlet; one of the at least two communication passages being sequentially communicated with the first air outlet, the air inlet, the air outlet and the second air outlet, and the other of the at least two communication passages being sequentially communicated with the second air outlet, the air inlet, the air outlet and the first air outlet. Through the above technical solution, the air duct assembly provided by the present disclosure can meet different air outlet requirements of the air conditioning device.

Description

Technical Field

[0001] This disclosure relates to the field of air conditioning technology, and more specifically, to an air duct assembly and an air conditioning device. Background Technology

[0002] In related technologies, air conditioning equipment has a single air duct and a fixed air outlet direction, which causes cold air to descend during cooling and hot air to rise during heating, affecting the uniformity of airflow and making it difficult to meet users' air blowing needs. Utility Model Content

[0003] The purpose of this disclosure is to provide a duct assembly and an air conditioning device that can meet the different air outlet requirements of the air conditioning device.

[0004] According to a first aspect of the present disclosure, a duct assembly is provided, the duct assembly comprising: The housing has a first air vent facing downwards and a second air vent facing forwards; At least one centrifugal fan, said centrifugal fan being provided with an air inlet and an air outlet; and, At least two connecting paths, one of which is sequentially connected to the first air vent, the air inlet, the air outlet and the second air vent, and the other of which is sequentially connected to the second air vent, the air inlet, the air outlet and the first air vent.

[0005] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: The air duct assembly provided by this disclosure has at least two connecting passages (for ease of description, these at least two connecting passages may include a first connecting passage and a second connecting passage) respectively connected to the air inlet and air outlet of a centrifugal fan. Driven by the centrifugal fan, the airflow flowing through the first connecting passage enters from the first air outlet and exits from the second air outlet, while the airflow flowing through the second connecting passage enters from the second air outlet and exits from the first air outlet. Thus, by selecting one of the first and second connecting passages for connection, the airflow can be controlled to be delivered through different directions of the first and second air outlets according to actual conditions, achieving both forward and reverse airflow capabilities for the air duct assembly. When this air duct assembly is applied in the field of air conditioning equipment, because the first and second air outlets have different orientations, the airflow can be flexibly selected to enter from the bottom and exit from the side, or to enter from the side and exit from the bottom, according to actual needs. This conforms to the airflow characteristics under different modes, meets the different air outlet requirements of the air conditioning equipment, and improves the user's comfort experience in different usage scenarios.

[0006] In some possible implementations, the air duct assembly includes a first operating mode and / or a second operating mode, and the connecting passage includes a first connecting passage and a second connecting passage. In the first operating mode, the first connecting passage is connected, and the second connecting passage is closed; or, in the second operating mode, the second connecting passage is connected, and the first connecting passage is closed. By switching between the first and second operating modes, forward and reverse airflow of the air duct assembly is achieved, effectively avoiding the uneven airflow problem of cold air sinking in cooling and hot air floating in heating, meeting the different air outlet requirements of air conditioning equipment, and improving the user's comfort experience in different usage scenarios.

[0007] In some possible implementations, the duct assembly includes a first branch pipe, a second branch pipe, a third branch pipe, and a fourth branch pipe. The first branch pipe selectively connects the first air outlet and the air inlet, the second branch pipe selectively connects the air outlet and the second air vent, the third branch pipe selectively connects the second air vent and the air inlet, and the fourth branch pipe selectively connects the air outlet and the first air vent. Thus, the branch pipe structure provides clear and independent airflow paths for the first and second connecting passages, and the branch pipe structure can be flexibly arranged according to the internal space of the housing, facilitating the configuration of the first and second connecting passages.

[0008] In some possible implementations, the first branch pipe and the third branch pipe have a first junction point, and the first branch pipe and the fourth branch pipe have a second junction point. The duct assembly includes a first three-way valve, which is disposed at either the first junction point or the second junction point; and / or, the second branch pipe and the fourth branch pipe have a third junction point, and the second branch pipe and the third branch pipe have a fourth junction point. The duct assembly includes a second three-way valve, which is disposed at either the third junction point or the fourth junction point. The arrangement of the first and second three-way valves simplifies the passage structure and enables precise switching between the first and second connecting passages, improving the switching response speed.

[0009] In some possible implementations, the bottom wall of the housing is provided with a first air vent, the front side wall of the housing is provided with a second air vent, and the housing includes a middle partition with a connecting port. In the first operating mode, the air outlet is connected to the second air vent through the connecting port; or, in the second operating mode, the air inlet is connected to the second air vent through the connecting port. This effectively avoids the problem of uneven airflow, such as cold air sinking in cooling systems and hot air floating in heating systems, meeting the different airflow requirements of air conditioning equipment and improving the user's comfort experience in different usage scenarios.

[0010] In some possible implementations, the duct assembly includes a first pressurization structure connecting the first air outlet and the air inlet; and / or, the duct assembly includes a second pressurization structure connecting the second air outlet and the air outlet. This ensures sufficient power for the airflow to be delivered, enabling longer delivery distances and wider coverage, adapting to the airflow needs of large spaces and long distances.

[0011] In some possible implementations, the first pressurization structure includes a first diffuser section, the opening of which gradually increases from the first air inlet toward a direction away from the first air inlet; and / or, the second pressurization structure includes a second diffuser section, the opening of which gradually increases from the second air inlet toward a direction away from the second air inlet. By utilizing fluid dynamics principles, the airflow is naturally accelerated and pressurized during the flow process, eliminating the need for an additional power source and reducing energy consumption.

[0012] In some possible implementations, the duct assembly includes at least two centrifugal fans, and the housing is provided with at least two first air outlets and at least two second air outlets, with each centrifugal fan forming a communication path with its corresponding first air outlet and second air outlet. Thus, by using multiple fans and multiple air outlets, the air supply coverage of the duct assembly can be significantly improved, adapting to the usage needs of large spaces (such as living rooms and conference rooms).

[0013] In some possible implementations, the centrifugal fan is constructed as a single-sided suction fan. A single-sided suction fan has a more compact structure, reducing the space occupied by the housing and adapting to the space constraints of concealed installation of air conditioning equipment (such as ducted systems).

[0014] According to a second aspect of the present disclosure, an air conditioning device is also provided, including the above-described air duct assembly.

[0015] In some possible implementations, the air conditioning device is a ducted air conditioner. Ducted air conditioners are characterized by uniform air delivery and gentle airflow, while also being aesthetically pleasing and space-saving.

[0016] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the air duct assembly provided in an exemplary embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of an air duct assembly provided in an exemplary embodiment of the present disclosure, wherein a first connecting passage and a second connecting passage are shown; Figure 3 This is a schematic diagram of the structure of the air duct assembly provided in an exemplary embodiment of the present disclosure from another perspective, in which a first connecting passage and a second connecting passage are shown; Figure 4 This is a structural schematic diagram of the air duct assembly provided in an exemplary embodiment of the present disclosure, in which the first air outlet of the housing is shown; Figure 5 This is a structural schematic diagram of the air duct assembly provided in an exemplary embodiment of the present disclosure, in which a centrifugal fan is shown; Figure 6 This is a schematic diagram of the structure of an air duct assembly provided in an exemplary embodiment of this disclosure, wherein a first connecting passage is shown; Figure 7 This is a schematic diagram of the structure of an air duct assembly provided in an exemplary embodiment of the present disclosure, wherein a second connecting passage is shown; Figure 8 This is a simplified schematic diagram of an air duct assembly provided in an exemplary embodiment of this disclosure; Figure 9 This is a simplified schematic diagram of an air duct assembly provided in an exemplary embodiment of the present disclosure, wherein a first connecting passage is shown; Figure 10 This is a simplified schematic diagram of an air duct assembly provided in an exemplary embodiment of the present disclosure, wherein a second connecting passage is shown.

[0018] Explanation of reference numerals in the attached figures 1-Shell; 11-First air outlet; 12-Second air outlet; 13-Fan cavity; 14-Heat exchange cavity; 15-Partition plate; 151-Connecting port; 2-Centrifugal fan; 21-Air inlet; 22-Air outlet; 31-First connecting passage; 32-Second connecting passage; 41-First branch pipe; 42-Second branch pipe; 43-Third branch pipe; 44-Fourth branch pipe; 45-First junction point; 46-Second junction point; 47-Third junction point; 48-Fourth junction point; 51-First three-way valve; 52-Second three-way valve; 53-First pressurization structure; 531-First diffuser section; 54-Second pressurization structure; 541-Second diffuser section; 55-First three-way pipe; 56-Second three-way pipe; 6-Heat exchanger; 100-Air duct assembly. Detailed implementation methods [1] The specific embodiments of this disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0020] In this disclosure, unless otherwise stated, the directional terms such as "upper" and "lower" generally refer to the relative positions of the corresponding components in the direction of gravity when they are in use; "inner" and "outer" generally refer to the relative positions of the corresponding components with respect to their own contours; and "front" and "rear" generally refer to the relative positions of the corresponding components in the horizontal direction when they are in use. In the air duct assembly provided in this disclosure, the orientation of the second air outlet 12 can be considered as "front," and vice versa. Furthermore, the terms "first," "second," etc., are used to distinguish one element from another and do not have sequential or importance implications. In addition, in the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.

[0021] This disclosure provides an exemplary embodiment of an air duct assembly. The air duct assembly 100 is optionally applicable to air conditioning equipment, including ducted air conditioners, wall-mounted air conditioners, cabinet air conditioners, fresh air units, and air purification equipment, etc. For ease of description, a ducted air conditioner is used as an example for illustrative purposes below.

[0022] According to the exemplary embodiments provided in this disclosure, refer to Figures 1 to 10 As shown, a duct assembly 100 is provided, the duct assembly 100 including: The housing 1 is provided with a first air vent 11 with its opening facing downward and a second air vent 12 with its opening facing forward. At least one centrifugal fan 2, the centrifugal fan 2 being provided with an air inlet 21 and an air outlet 22; and, There are at least two connecting passages, one of which is connected sequentially to the first air vent 11, the air inlet 21, the air outlet 22 and the second air vent 12, and the other of which is connected sequentially to the second air vent 12, the air inlet 21, the air outlet 22 and the first air vent 11.

[0023] The air duct assembly 100 provided in this disclosure is provided with at least two connecting passages (for ease of description, the at least two connecting passages may include a first connecting passage 31 and a second connecting passage 32) which are respectively connected to the air inlet 21 and the air outlet 22 of the centrifugal fan 2. Driven by the centrifugal fan 2, the airflow flowing through the first connecting passage 31 enters from the first air outlet 11 and is sent out from the second air outlet 12, and the airflow flowing through the second connecting passage 32 enters from the second air outlet 12 and is sent out from the first air outlet 11. Thus, by selecting one of the first connecting passage 31 and the second connecting passage 32 for connection, the airflow can be controlled to be sent out through the first air outlet 11 and the second air outlet 12 in different directions according to the actual situation, so that the air duct assembly 100 can perform both forward air supply and reverse air supply. When the air duct assembly 100 is applied to the field of air conditioning equipment, since the first air outlet 11 and the second air outlet 12 are oriented differently, the airflow can be flexibly selected to enter from the bottom and exit from the side, or to enter from the side and exit from the bottom, according to actual needs. This fits the airflow characteristics of different modes, meets the different air outlet requirements of the air conditioning equipment, and improves the user's comfort experience in different usage scenarios.

[0024] It should be noted that in this disclosure, both ends of the first connecting passage 31 and the second connecting passage 32 are connected to the first air outlet 11 and the second air outlet 12, and the airflows flowing through the first connecting passage 31 and the second connecting passage 32 have different flow directions. In some other embodiments, the housing 1 may also be provided with two first air outlets 11 and two second air outlets 12, with the first connecting passage 31 and the second connecting passage 32 respectively connected to their respective first air outlets 11 and second air outlets 12, and the airflows flowing through the first connecting passage 31 and the second connecting passage 32 have different flow directions, which can also realize that the air duct assembly 100 can have both forward air supply and reverse air supply. This disclosure does not impose specific limitations on this.

[0025] The air duct assembly provided in this disclosure, as an exemplary embodiment, refers to... Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the air duct assembly 100 may include a first operating mode and / or a second operating mode, and the connecting passage includes a first connecting passage 31 and a second connecting passage 32. That is, the air duct assembly 100 may include either the first mode or the second mode, or it may include both the first operating mode and the second operating mode.

[0026] In the first working mode, refer to Figure 6 and Figure 9As shown, the first connecting passage 31 can be connected, and the second connecting passage 32 can be closed. In this case, the airflow enters the centrifugal fan 2 through the first air inlet 11 and the air inlet 21, then flows through the air outlet 22 to the second air inlet 12 and is discharged, thereby achieving lower air inlet and lateral air outlet of the duct assembly 100. Alternatively, In the second working mode, refer to Figure 7 and Figure 10 As shown, the first connecting passage 31 can be closed, and the second connecting passage 32 can be connected. At this time, the airflow enters the centrifugal fan 2 through the second air inlet 12 and the air inlet 21, and then flows to the first air inlet 11 through the air outlet 22 and is sent out, thereby realizing the lateral air inlet and lower air outlet of the air duct assembly 100.

[0027] The air duct assembly provided in this disclosure switches between a first operating mode and a second operating mode by connecting one of the first connecting passage 31 and the second connecting passage 32 and disconnecting the other. This allows the air duct assembly 100 to achieve both forward air supply (i.e., airflow enters from the bottom and exits from the side) and reverse air supply (i.e., airflow enters from the side and exits from the bottom). By changing the direction of airflow, it helps to accelerate indoor air circulation, improve indoor air circulation efficiency, and enhance the user experience.

[0028] This improvement in air circulation efficiency has different effects on different devices. Taking a device that can cool or heat as an example, when cooling in summer, the cold airflow presses the hot airflow to the bottom, forming a stratification of cold at the top and hot at the bottom. In related technologies, a single air inlet and outlet path, such as side air inlet and bottom air outlet, prevents the hot airflow at the bottom from being quickly drawn into the device. In this case, the reversible air supply is switched to bottom air inlet and side air outlet, so that the hot airflow at the bottom can be quickly drawn into the device.

[0029] Based on the above embodiments, as an exemplary embodiment, refer to Figure 2 , Figure 3 and Figure 8 As shown, the air duct assembly 100 may include a first branch pipe 41, a second branch pipe 42, a third branch pipe 43, and a fourth branch pipe 44. The first branch pipe 41 can selectively connect to the first air outlet 11 and the air inlet 21; the second branch pipe 42 can selectively connect to the air outlet 22 and the second air outlet 12; the third branch pipe 43 can selectively connect to the second air outlet 12 and the air inlet 21; and the fourth branch pipe 44 can selectively connect to the air outlet 22 and the first air outlet 11. Through the branch pipe structure, a clear and independent airflow path can be provided for the first connecting passage 31 and the second connecting passage 32. Furthermore, the branch pipe structure can be flexibly arranged according to the internal space of the housing 1, facilitating the configuration of the first connecting passage 31 and the second connecting passage 32.

[0030] In the first working mode, reference Figure 2 , Figure 3 and Figure 9 As shown, the first branch pipe 41 and the second branch pipe 42 are connected, while the third branch pipe 43 and the fourth branch pipe 44 are cut off to form the first connecting passage 31. At this time, the airflow enters the first branch pipe 41 from the first air outlet 11, and then enters the second branch pipe 42 through the air inlet 21 and air outlet 22 of the centrifugal fan 2, and is sent out from the second air outlet 12 to realize the positive air supply of the air duct assembly 100.

[0031] In the second working mode, refer to Figure 2 , Figure 3 and Figure 10 As shown, the third branch pipe 43 and the fourth branch pipe 44 are connected, while the first branch pipe 41 and the second branch pipe 42 are cut off to form a second connecting passage 32. At this time, the airflow enters the third branch pipe 43 from the second air outlet 12, and then enters the fourth branch pipe 44 through the air inlet 21 and air outlet 22 of the centrifugal fan 2, and is sent out from the first air outlet 11, realizing the reverse air supply of the air duct assembly 100.

[0032] Based on the above embodiments, the first branch pipe 41, the second branch pipe 42, the third branch pipe 43, and the fourth branch pipe 44 can be arranged in any suitable form within the air duct assembly 100. As an exemplary embodiment, refer to... Figure 8 As shown, the first branch pipe 41 and the third branch pipe 43 may have a first junction point 45, the first branch pipe 41 and the fourth branch pipe 44 may have a second junction point 46, the duct assembly 100 may include a first three-way valve 51, the first three-way valve 51 may be arranged at the first junction point 45 or the second junction point 46; and / or, the second branch pipe 42 and the fourth branch pipe 44 may have a third junction point 47, the second branch pipe 42 and the third branch pipe 43 may have a fourth junction point 48, the duct assembly 100 may include a second three-way valve 52, the second three-way valve 52 may be arranged at the third junction point 47 or at the fourth junction point 48. In this way, the arrangement of the first three-way valve 51 and the second three-way valve 52 simplifies the passage structure and enables precise switching between the first connecting passage 31 and the second connecting passage 32, improving the switching response speed. On the other hand, it improves the flexibility of the arrangement of the first branch pipe 41, the second branch pipe 42, the third branch pipe 43 and the fourth branch pipe 44 in the internal space of the housing 1. By selectively connecting the first branch pipe 41, the third branch pipe 43 and the air inlet 21 through the first three-way valve 51, and selectively connecting the second branch pipe 42, the fourth branch pipe 44 and the air outlet 22 through the second three-way valve 52, the arrangement of the branch pipe structure is simplified, the airflow transmission distance is shortened, and the air supply efficiency in the first working mode and the second working mode is improved.

[0033] Furthermore, in this disclosure, references Figure 2 , Figure 3 and Figure 8 As shown, the duct assembly 100 may further include a first three-way pipe 55 and a second three-way pipe 56. A first three-way valve 51 may be arranged at one of the first junction point 45 and the second junction point 46, while the first three-way pipe 55 may be arranged at the other of the first junction point 45 and the second junction point 46. For example, the first three-way valve 51 may be arranged at the first junction point 45, and the first three-way pipe 55 may be arranged at the second junction point 46, facilitating communication between the first branch pipe 41, the fourth branch pipe 44, and the first air outlet 11, thus simplifying the branch pipe structure arrangement. Similarly, a second three-way valve 52 may be arranged at one of the third junction point 47 and the fourth junction point 48, while the second three-way pipe 56 may be arranged at the other of the third junction point 47 and the fourth junction point 48. For example, the second three-way valve 52 may be arranged at the third junction point 47, and the second three-way pipe 56 may be arranged at the fourth junction point 48, facilitating communication between the second branch pipe 42, the third branch pipe 43, and the second air outlet 12. In some other embodiments, the first three-way valve 51 is also arranged at the second junction point 46, the first three-way pipe 55 is arranged at the first junction point 45, the second three-way valve 52 can be arranged at the fourth junction point 48, and the second three-way pipe 56 is arranged at the third junction point 47. All of these can achieve the purpose of simplifying the structure of the air duct assembly 100 while ensuring the arrangement of the first connecting passage 31 and the second connecting passage 32. This disclosure does not impose any specific limitations on this.

[0034] In the air duct assembly provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 1 and Figure 4 As shown, the bottom wall of the housing 1 may be provided with a first air vent 11, the front side wall of the housing 1 may be provided with a second air vent 12, and the housing 1 may include a middle partition 15, the middle partition 15 being provided with a connecting port 151. In the first working mode, the air outlet 22 can be connected to the second air vent 12 through the connecting port 151; or, in the second working mode, the air inlet 21 can be connected to the second air vent 12 through the connecting port 151. By setting the first air vent 11 on the bottom wall of the housing 1 and the second air vent 12 on the front side wall of the housing 1, taking the cooling and heating process as an example, the air duct assembly 100 can adopt a first working mode when cooling, so that the cold air passes through the air outlet 22 of the centrifugal fan 2, passes through the connecting port 151, and is sent out from the second air vent 12 with the opening facing forward. In this way, the cold air can be prevented from falling directly and accumulating on the ground. When heating, the air duct assembly 100 can adopt a second working mode, so that the hot air passes through the air outlet 22 of the centrifugal fan 2, passes through the connecting port 151, and is sent out from the first air vent 11 with the opening facing downward. This prevents the hot air from rising and accumulating at the top, effectively avoiding the problem of uneven airflow where the cold air sinks when cooling and the hot air rises when heating. This meets the different air outlet requirements of the air conditioning equipment and improves the user's comfort experience in different usage scenarios.

[0035] In addition, the partition plate 15 can separate the internal space of the housing 1, dividing the housing 1 into a fan chamber 13 and a heat exchange chamber 14 that are isolated from each other. The fan chamber 13 can be equipped with a centrifugal fan 2, and the heat exchange chamber 14 can be equipped with a heat exchanger 6, so as to reasonably divide the internal space of the housing 1, avoid the airflow at the first air outlet 11 from interfering with the components in the fan chamber 13, and improve the reliability of the air supply of the air duct assembly 100.

[0036] In the air duct assembly provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 2 or Figure 3 As shown, the duct assembly 100 may include a first pressurization structure 53, which connects the first air outlet 11 and the air inlet 21; and / or, the duct assembly 100 may include a second pressurization structure 54, which connects the second air outlet 12 and the air outlet 22. By configuring the first pressurization structure 53 and the second pressurization structure 54, the airflow passing through the first air outlet 11 and the second air outlet 12 can be pressurized, ensuring that the airflow has a certain pressure when entering the centrifugal fan 2, thereby ensuring sufficient power when the airflow is delivered, so that the airflow can be transported over a longer distance and cover a wider area, adapting to the air supply needs of large spaces and long distances.

[0037] Based on the above embodiments, as an exemplary embodiment, refer to Figure 2 or Figure 3 As shown, the first pressurization structure 53 may include a first diffuser section 531, the opening of which gradually increases from the first air vent 11 toward a direction away from the first air vent 11; and / or, the second pressurization structure 54 may include a second diffuser section 541, the opening of which gradually increases from the second air vent 12 toward a direction away from the second air vent 12. That is, both the first diffuser section 531 and the second diffuser section 541 taper toward the inner side of the housing 1. Thus, the gradually tapering first diffuser section 531 and second diffuser section 541 utilize fluid dynamics principles to naturally accelerate and pressurize the airflow during its flow, eliminating the need for an additional power source and reducing energy consumption. Simultaneously, the gradually changing cross-sectional area prevents eddies and turbulence caused by abrupt changes in cross-section, ensuring smooth airflow, improving pressurization efficiency and airflow uniformity, reducing wind noise generated by airflow impact, improving the quietness of the duct assembly 100, and enhancing the user experience.

[0038] In the air duct assembly provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 2 or Figure 3As shown, the air duct assembly 100 may include at least two centrifugal fans 2, and the housing 1 may be provided with at least two first air outlets 11 and at least two second air outlets 12. Each centrifugal fan 2 can form a communication passage with its corresponding first air outlet 11 and second air outlet 12. That is to say, the air duct assembly 100 can be provided with two independent air supply systems. In this way, by setting up multiple fans and multiple air outlets, the air supply coverage of the air duct assembly 100 can be significantly improved, adapting to the usage needs of large spaces (such as living rooms and conference rooms). In addition, each centrifugal fan 2 can be independently controlled to accurately supply air according to the temperature requirements of different areas, realize zoned air control, and improve indoor temperature uniformity. At the same time, the setting of multiple fans can serve as backups for each other, improving the reliability of the air duct assembly 100, avoiding the failure of a single fan causing the equipment to malfunction, and enhancing the practicality of the air conditioning equipment.

[0039] In the duct assembly provided in this disclosure, as an exemplary embodiment, the centrifugal fan 2 can be configured as a single-sided suction fan. The single-sided suction fan has a more compact structure, reducing the space occupied by the housing 1 and adapting to the space constraints of concealed installation of air conditioning equipment (such as ducted air conditioners).

[0040] According to a second aspect of the embodiments of this disclosure, the air duct assembly 100 described above is included. The air duct assembly 100 has all the beneficial effects described above. The air conditioning equipment includes ducted air conditioners, wall-mounted air conditioners, cabinet air conditioners, fresh air units, and air purification equipment, etc.

[0041] In the air conditioning equipment disclosed herein, the air conditioning equipment can be a ducted air conditioner, which has the characteristics of uniform air delivery and gentle airflow, while also being aesthetically pleasing and space-saving.

[0042] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0043] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0044] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A duct assembly, characterized in that, The air duct assembly includes: The housing has a first air vent facing downwards and a second air vent facing forwards; At least one centrifugal fan, said centrifugal fan being provided with an air inlet and an air outlet; and At least two connecting paths, one of which is sequentially connected to the first air vent, the air inlet, the air outlet and the second air vent, and the other of which is sequentially connected to the second air vent, the air inlet, the air outlet and the first air vent.

2. The air duct assembly according to claim 1, characterized in that, The air duct assembly includes a first operating mode and / or a second operating mode, and the connecting passage includes a first connecting passage and a second connecting passage. In the first working mode, the first connection path is connected, and the second connection path is cut off; or, In the second working mode, the second connection path is connected, and the first connection path is closed.

3. The air duct assembly according to claim 1, characterized in that, The air duct assembly includes a first branch pipe, a second branch pipe, a third branch pipe, and a fourth branch pipe. The first branch pipe selectively connects to the first air outlet and the air inlet. The second branch pipe selectively connects to the air outlet and the second air vent. The third branch pipe selectively connects to the second air vent and the air inlet. The fourth branch pipe selectively connects to the air outlet and the first air vent.

4. The air duct assembly according to claim 3, characterized in that, The first branch pipe and the third branch pipe have a first junction point, and the first branch pipe and the fourth branch pipe have a second junction point. The duct assembly includes a first three-way valve, which is disposed at either the first junction point or the second junction point; and / or... The second branch pipe and the fourth branch pipe have a third junction point, and the second branch pipe and the third branch pipe have a fourth junction point. The air duct assembly includes a second three-way valve, which is arranged at the third junction point or at the fourth junction point.

5. The air duct assembly according to claim 2, characterized in that, The bottom wall of the housing is provided with a first air vent, the front side wall of the housing is provided with a second air vent, and the housing includes a middle partition plate with a communication opening. In the first operating mode, the air outlet is connected to the second air outlet through the connecting port; or, In the second operating mode, the air inlet is connected to the second air outlet through the connecting port.

6. The air duct assembly according to claim 1, characterized in that, The air duct assembly includes a first pressurization structure, the first pressurization structure connecting the first air outlet and the air inlet; and / or The air duct assembly includes a second pressurization structure, which connects the second air outlet and the air outlet.

7. The air duct assembly according to claim 6, characterized in that, The first pressurization structure includes a first diffuser section, the opening of which gradually increases from the first air inlet toward a direction away from the first air inlet; and / or, The second pressurization structure includes a second diffuser section, the opening of which gradually increases from the second air outlet toward a direction away from the second air outlet.

8. The air duct assembly according to any one of claims 1-7, characterized in that, The air duct assembly includes at least two centrifugal fans, and the housing is provided with at least two first air outlets and at least two second air outlets, with each centrifugal fan forming a communication passage with its corresponding first air outlet and second air outlet.

9. The air duct assembly according to claim 1, characterized in that, The centrifugal fan is constructed as a single-sided suction fan.

10. An air conditioning device, characterized in that, Includes the air duct assembly according to any one of claims 1-9.

11. The air conditioning device according to claim 10, characterized in that, The air conditioning equipment is a ducted air conditioner.

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