Air duct components and air conditioners containing them

Abstract

The present invention provides an air duct assembly and an air conditioner having the same, wherein the air conditioner comprises a shell and an air duct assembly arranged in the shell, the air duct assembly is the above-mentioned air duct assembly; the air duct assembly comprises a shell, a first-level mixed flow fan blade and a second-level mixed flow fan blade, the shell has a flow cavity and a first air port and a second air port connected to the flow cavity, the flow cavity includes a first-level flow sub-cavity and a second-level flow sub-cavity connected in the direction from the first air port to the second air port; the first-level mixed flow fan blade is rotatably arranged in the first-level flow sub-cavity; the second-level mixed flow fan blade is rotatably arranged in the second-level flow sub-cavity. The present invention solves the problem that the air duct assembly of the air conditioner in the prior art has a poor effect on the air flow in the flow cavity, which results in a small air volume at the air outlet of the air duct assembly, and fails to achieve the preset cooling or heating effect of the air conditioner, reduces the practicality of the air conditioner, and thus affects the user's good experience.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to an air duct component of an air conditioner. Background Art

[0002] As a household appliance, the air conditioner can deliver cool air to users in hot weather and warm air to users in cold weather, which greatly improves the quality of life of users. It is increasingly favored by consumers and has been widely used.

[0003] The air conditioner includes a shell and an air duct assembly arranged in the shell. The existing air duct assembly cannot switch the flow direction of the airflow, and the airflow direction is single. Specifically, when the air conditioner is working, the airflow can only enter the flow cavity from the air inlet of the air duct assembly. The mixed flow blades in the flow cavity do work on the airflow, and the airflow after the mixed flow blades do work is finally blown out directly from the air outlet of the air duct assembly.

[0004] The above-mentioned air duct assembly has limited ability to work on the air flow in the flow cavity during the operation of the air conditioner, making it difficult for the air flow to overcome greater resistance, which will ultimately result in a small air outlet at the air duct assembly, failing to achieve the preset cooling or heating effect of the air conditioner, reducing the practicality of the air conditioner and affecting the user's usage experience. Summary of the invention

[0005] The main purpose of the present invention is to provide an air duct assembly and an air conditioner having the same, so as to solve the problem that the air duct assembly of the air conditioner in the prior art cannot switch the flow direction of the air flow, the air flow direction is single, and the work effect on the air flow in the flow cavity is poor, which leads to a small air outlet of the air duct assembly, fails to achieve the preset cooling or heating effect of the air conditioner, reduces the practicability of the air conditioner, and thus affects the user's experience.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an air duct assembly, comprising a shell, a first-level mixed flow blade and a second-level mixed flow blade, wherein the shell has a flow cavity and a first air port and a second air port connected to the flow cavity, wherein the flow cavity includes a first-level flow sub-cavity and a second-level flow sub-cavity connected in a direction from the first air port to the second air port; the first-level mixed flow blade is rotatably arranged in the first-level flow sub-cavity; the second-level mixed flow blade is rotatably arranged in the second-level flow sub-cavity; the first-level mixed flow blade and the second-level mixed flow blade rotate along a first direction to realize wind guidance from the first air port to the second air port; the first-level mixed flow blade and the second-level mixed flow blade rotate along a second direction opposite to the first direction to realize wind guidance from the second air port to the first air port.

[0007] Furthermore, the shell is a rotating body structure, the first air outlet and the second air outlet are respectively located at two ends of the axis of the shell, and the first-stage mixed flow fan blade and the second-stage mixed flow fan blade rotate around the axis of the shell.

[0008] Further, when the first-stage mixed flow blade and the second-stage mixed flow blade rotate in the same direction, the rotational speeds of the first-stage mixed flow blade and the second-stage mixed flow blade are equal or they rotate at a differential speed.

[0009] Furthermore, the shell is a first shell, the first shell includes a first sub-shell segment and a second sub-shell segment, wherein the first sub-shell segment has a first air port and a primary flow sub-cavity, and the cavity cross-sectional area of ​​the primary flow sub-cavity first gradually increases and then gradually decreases in the direction away from the first air port; the second sub-shell segment is connected to the first sub-shell segment, the second sub-shell segment has a second air port and a secondary flow sub-cavity, and the cavity cross-sectional area of ​​the secondary flow sub-cavity first gradually increases and then gradually decreases in the direction approaching the second air port.

[0010] Further, the first-stage mixed flow blade and the second-stage mixed flow blade rotate along the first direction so that the first air outlet is the air inlet and the second air outlet is the air outlet.

[0011] Furthermore, the shell is a second shell, which includes an air inlet sub-shell section, a transition sub-shell section and an air outlet sub-shell section connected in sequence, wherein the air inlet sub-shell section has a second air outlet, the cavity cross-sectional area of ​​the transition sub-shell section gradually increases in the direction away from the air inlet sub-shell section, and the air outlet sub-shell section has a primary flow sub-cavity and a secondary flow sub-cavity with equal cavity cross-sectional areas, as well as a first air outlet.

[0012] Furthermore, the air inlet sub-shell section and the air outlet sub-shell section are both cylindrical, and the opening area of ​​the first air outlet is larger than the opening area of ​​the second air outlet.

[0013] Further, the first-stage mixed flow blade and the second-stage mixed flow blade rotate along the second direction so that the first air outlet is an air outlet and the second air outlet is an air inlet.

[0014] According to another aspect of the present invention, an air conditioner is provided, comprising a housing and an air duct assembly arranged in the housing, wherein the air duct assembly is the above-mentioned air duct assembly.

[0015] By applying the technical solution of the present invention, a first-level mixed flow fan blade is arranged in the first-level flow sub-cavity, and a second-level mixed flow fan blade is arranged in the second-level flow sub-cavity. In this way, the work-doing capacity of the air duct assembly on the airflow is increased. Specifically, during the operation of the air conditioner, the first-level mixed flow fan blade and the second-level mixed flow fan blade rotate together, and can do work twice on the airflow passing through the flow cavity, thereby improving the ability of the airflow to overcome greater resistance, which is beneficial to increasing the air output volume and air output intensity of the air duct assembly, so that the air conditioner achieves a preset heating or cooling effect, ensures the practicability of the air conditioner, and improves the user's favorable experience.

[0016] It should be noted that when the air duct assembly of the present application is working, when the first-level mixed flow blades and the second-level mixed flow blades rotate along the first direction, the air flow in the flow cavity flows from the first air outlet to the second air outlet; when the first-level mixed flow blades and the second-level mixed flow blades rotate along the second direction opposite to the first direction, the air flow in the flow cavity flows from the second air outlet to the first air outlet. That is to say, the air duct assembly of the present application can change the flow direction of the air flow in the flow cavity by changing the rotation direction of the first-level mixed flow blades and the second-level mixed flow blades, thereby being able to conveniently control the air outlet position of the air duct assembly, thereby improving the practicality of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic front view of an air duct assembly according to Embodiment 1 of the present invention is shown;

[0019] Figure 2 Shows Figure 1 A schematic diagram of the internal structure of the air duct assembly in a cross-sectional state;

[0020] Figure 3 A schematic front view of an air duct assembly according to a second embodiment of the present invention is shown;

[0021] Figure 4 Shows Figure 3 Schematic diagram of the internal structure of the air duct component in a cross-sectional view.

[0022] The above drawings include the following reference numerals:

[0023] 10. Shell; 11. Flow chamber; 12. First air outlet; 13. Second air outlet; 111. First-level flow sub-chamber; 112. Second-level flow sub-chamber; 20. First-level mixed flow fan blade; 30. Second-level mixed flow fan blade; 100. First shell; 101. First sub-shell section; 102. Second sub-shell section; 200. Second shell; 201. Air inlet sub-shell section; 202. Transition sub-shell section; 203. Air outlet sub-shell section. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In order to solve the problem that the air duct assembly of the air conditioner in the prior art cannot switch the flow direction of the airflow, the airflow direction is single, and the work effect on the airflow in the flow cavity is poor, which leads to a small air outlet of the air duct assembly, fails to achieve the preset cooling or heating effect of the air conditioner, reduces the practicality of the air conditioner, and thus affects the user's usage experience, the present invention provides a duct assembly and an air conditioner. It should be noted that the air conditioner includes a shell and a duct assembly arranged in the shell, and the duct assembly is the duct assembly mentioned above and below.

[0026] It should be noted that in the illustrated embodiment of the present application, Figure 2 The direction indicated by arrow A is the first direction described below. Figure 4 The direction indicated by the arrow B is the second direction described below.

[0027] Embodiment 1

[0028] like Figure 1 and Figure 2 As shown, the air duct assembly includes a shell 10, a first-level mixed flow fan blade 20 and a second-level mixed flow fan blade 30, wherein the shell 10 has a flow cavity 11 and a first air port 12 and a second air port 13 connected to the flow cavity 11, wherein the flow cavity 11 includes a first-level flow sub-cavity 111 and a second-level flow sub-cavity 112 connected to each other in the direction from the first air port 12 to the second air port 13; the first-level mixed flow fan blade 20 is rotatably arranged in the first-level flow sub-cavity 111; the second-level mixed flow fan blade 30 is rotatably arranged in the second-level flow sub-cavity 112; the first-level mixed flow fan blade 20 and the second-level mixed flow fan blade 30 rotate along a first direction to realize wind guidance from the first air port 12 to the second air port 13; the first-level mixed flow fan blade 20 and the second-level mixed flow fan blade 30 rotate along a second direction opposite to the first direction to realize wind guidance from the second air port 13 to the first air port 12.

[0029] By arranging a first-level mixed flow fan blade 20 in the first-level flow sub-cavity 111 and a second-level mixed flow fan blade 30 in the second-level flow sub-cavity 112, the work-doing capacity of the air duct assembly on the airflow is increased. Specifically, during the operation of the air conditioner, the first-level mixed flow fan blade 20 and the second-level mixed flow fan blade 30 rotate together, and can do work twice on the airflow passing through the flow cavity 11, thereby improving the ability of the airflow to overcome greater resistance, which is beneficial to increasing the air output and air output intensity of the air duct assembly, so that the air conditioner achieves the preset heating or cooling effect, ensures the practicality of the air conditioner, and improves the user's usage experience.

[0030] It should be noted that when the air duct assembly of the present application is working, when the first-level mixed flow blades 20 and the second-level mixed flow blades 30 rotate along the first direction, the air flow in the flow cavity 11 flows from the first air outlet 12 to the second air outlet 13; when the first-level mixed flow blades 20 and the second-level mixed flow blades 30 rotate along the second direction opposite to the first direction, the air flow in the flow cavity 11 flows from the second air outlet 13 to the first air outlet 12. That is to say, the air duct assembly of the present application can change the rotation direction of the first-level mixed flow blades 20 and the second-level mixed flow blades 30 to change the flow direction of the air flow in the flow cavity 11, thereby conveniently controlling the air outlet position of the air duct assembly, thereby improving the practicality of the air conditioner.

[0031] like Figure 1 and Figure 2 As shown, the shell 10 is a rotating body structure, the first air outlet 12 and the second air outlet 13 are respectively located at the two ends of the axis of the shell 10, and the first mixed flow blade 20 and the second mixed flow blade 30 rotate around the axis of the shell 10. In this way, the shell 10 is a rotating body structure, which is not only easy to manufacture, but also has an effective guidance of the airflow, and is conducive to reducing the resistance loss along the way when the airflow flows through the flow cavity 11 of the shell 10, so as to reduce the energy loss of the airflow; in addition, the first mixed flow blade 20 and the second mixed flow blade 30 rotate around the axis of the shell 10, so that the gap between the outer peripheral side of the first mixed flow blade 20 and the second mixed flow blade 30 and the inner wall surface of the shell 10 is equal everywhere along the circumference of the shell 10, so that the intensity of the airflow after the first mixed flow blade 20 and the second mixed flow blade 30 do work on the air outlet surface is evenly distributed, which is more conducive to improving the user experience.

[0032] Optionally, when the first-level mixed flow blade 20 and the second-level mixed flow blade 30 rotate in the same direction, the rotation speeds of the first-level mixed flow blade 20 and the second-level mixed flow blade 30 are equal; in this way, when the airflow flows through the first-level flow sub-cavity 111 and the second-level flow sub-cavity 112 in sequence, it is ensured that the work done by the first-level mixed flow blade 20 on the airflow and the work done by the second-level mixed flow blade 30 on the airflow are equal, so that the energy of the airflow is steadily increased in a step-like manner, and no turbulence phenomenon will occur in the flow cavity 11, thereby improving the user's comfort while ensuring that the air outlet intensity of the air duct component is improved.

[0033] Of course, when the first-level mixed flow blades 20 and the second-level mixed flow blades 30 rotate in the same direction, the first-level mixed flow blades 20 and the second-level mixed flow blades 30 rotate differentially. In this way, the first-level mixed flow blades 20 and the second-level mixed flow blades 30 can be infinitely differentially adjusted, so that the work done by the first-level mixed flow blades 20 on the airflow and the work done by the second-level mixed flow blades 30 on the airflow can be controlled respectively, so as to achieve precise control of the energy of the airflow outlet of the air duct assembly, thereby further meeting the user's different needs for the air outlet effect of the air conditioner and enhancing the user's experience.

[0034] In this embodiment, if Figure 1 and Figure 2 As shown, the shell 10 is a first shell 100, and the first shell 100 includes a first sub-shell segment 101 and a second sub-shell segment 102, wherein the first sub-shell segment 101 has a first air port 12 and a primary flow sub-cavity 111, and the cavity cross-sectional area of ​​the primary flow sub-cavity 111 gradually increases and then gradually decreases in the direction away from the first air port 12; the second sub-shell segment 102 is connected to the first sub-shell segment 101, and the second sub-shell segment 102 has a second air port 13 and a secondary flow sub-cavity 112, and the cavity cross-sectional area of ​​the secondary flow sub-cavity 112 gradually increases and then gradually decreases in the direction close to the second air port 13. In this way, by optimizing the specific structural form of the shell 10, the cavity shapes of the primary flow sub-cavity 111 and the secondary flow sub-cavity 112 are accurately improved, which is conducive to the smooth flow of the airflow through the flow cavity 11, wherein the cavity cross-sectional area of ​​the primary flow sub-cavity 111 gradually increases and then gradually decreases in the direction away from the first air outlet 12, so that after the flow velocity of the airflow entering the primary flow sub-cavity 111 is instantly reduced, the energy is continuously accumulated under the work action of the primary mixed flow impeller 20, and the flow velocity when flowing out of the primary flow sub-cavity 111 is increased to the predetermined value. Assuming a value, similarly, the cross-sectional area of ​​the secondary flow sub-cavity 112 gradually increases and then gradually decreases in the direction close to the second air outlet 13, which also greatly improves the energy of the airflow, so that the airflow has a large speed and strong kinetic energy after flowing out of the shell 10; it should also be noted that the cavity shape of the above-mentioned primary flow sub-cavity 111 and the secondary flow sub-cavity 112 is also conducive to the installation of the primary mixed flow fan blade 20 and the secondary mixed flow fan blade 30, providing a highly adaptable installation space for the two, so as to ensure that the air duct assembly has a regular overall structure.

[0035] like Figure 1 and Figure 2As shown, the opening area of ​​the first air outlet 12 is greater than or equal to the opening area of ​​the second air outlet 13, and the first mixed flow blade 20 and the second mixed flow blade 30 rotate along the first direction, so that the first air outlet 12 is the air inlet and the second air outlet 13 is the air outlet. In this way, during the operation of the air conditioner, when the first mixed flow blade 20 and the second mixed flow blade 30 rotate along the first direction, the airflow enters the first flow sub-cavity 111 from the first air outlet 12, and the first mixed flow blade 20 in the first flow sub-cavity 111 performs a work on the airflow once, and the airflow after the first work enters the second flow sub-cavity 112, and the second mixed flow blade 30 in the second flow sub-cavity 112 performs a second work on the airflow, and the airflow after the second work is blown out from the second air outlet 13, thereby improving the ability of the airflow to overcome greater resistance, effectively increasing the air volume of the second air outlet 13 of the air duct assembly, so that the air conditioner achieves the preset cooling effect, ensures the practicality of the air conditioner, and improves the user's good experience.

[0036] It should be noted that the air duct assembly in this embodiment needs to be used in the cooling mode of the air conditioner, and the installation method of the air duct assembly in the housing of the air conditioner is also the same as Figure 1 and Figure 2 In the form of, that is, the first air outlet 12 is the lower air inlet, and the second air outlet 13 is the upper air outlet, so that the cold air will be blown out of the air conditioner from the second air outlet 13 at a high position, so that the cold air can quickly cool the entire space in a sinking manner, so as to enhance the cooling capacity of the air conditioner and improve the practicality of the air conditioner.

[0037] Embodiment 2

[0038] like Figure 3 and Figure 4 As shown, the difference between this embodiment and the first embodiment is that the shell 10 is a second shell 200, and the second shell 200 includes an air inlet sub-shell segment 201, a transition sub-shell segment 202 and an air outlet sub-shell segment 203 connected in sequence, wherein the air inlet sub-shell segment 201 has a second air port 13, the cavity cross-sectional area of ​​the transition sub-shell segment 202 gradually increases in the direction away from the air inlet sub-shell segment 201, and the air outlet sub-shell segment 203 has a primary flow sub-cavity 111 and a secondary flow sub-cavity 112 with equal cavity cross-sectional areas, and a first air port 12. In this way, the cavity cross-sectional area of ​​the transition sub-shell segment 202 gradually increases in the direction away from the air inlet sub-shell segment 201. When the airflow flows from the second air outlet 13 to the first air outlet 12, the area of ​​the flow channel of the airflow gradually increases when passing through the transition sub-shell segment 202, so that the pressure of the airflow is released, and it is beneficial to increase the air intake volume. Then, when the airflow flows through the secondary mixed flow fan blade 30 and the primary mixed flow fan blade 20 in turn, work is done on them in turn, which is beneficial to increase the kinetic energy. Therefore, when the shell 10 with the above-mentioned structural form is used as the shell of the air duct assembly, it can not only effectively increase the energy of the airflow flowing through it, but also effectively increase the air output.

[0039] In this embodiment, in order to allow the air flow to flow smoothly in the second shell 200, the air outlet sub-shell segment 203 has a primary flow sub-cavity 111 and a secondary flow sub-cavity 112 with equal cavity cross-sectional areas. In this way, the air outlet sub-shell segment 203 can be designed to be cylindrical, thereby simplifying the processing and manufacturing difficulty of the second shell 200.

[0040] It should be noted that, in the present embodiment, the primary mixed flow blade 20 and the secondary mixed flow blade 30 rotate in the second direction, so that the first air outlet 12 is the air outlet, and the second air outlet 13 is the air inlet. In this way, when the primary mixed flow blade 20 and the secondary mixed flow blade 30 rotate in the second direction opposite to the first direction, the airflow enters the secondary flow sub-cavity 112 from the second air outlet 13, and the secondary mixed flow blade 30 in the secondary flow sub-cavity 112 performs work on the airflow once, and the airflow after the work once enters the primary flow sub-cavity 111, and the primary mixed flow blade 20 in the primary flow sub-cavity 111 performs work on the airflow twice, which improves the ability of the airflow to overcome greater resistance, effectively increases the airflow volume of the first air outlet 12 of the air duct assembly, and enables the air conditioner to achieve the preset heating effect, ensures the practicality of the air conditioner, and improves the user's good experience.

[0041] It should be noted that the air duct assembly in this embodiment needs to be used in the heating mode of the air conditioner, and the installation method of the air duct assembly in the housing of the air conditioner is also the same as Figure 2 and Figure 3 In the form of, that is, the second air outlet 13 is the upper air inlet, and the first air outlet 12 is the lower air outlet, so that the hot air will be blown out of the air conditioner from the first air outlet 12 at a low position, so that the hot air can quickly heat the entire space in an ascending manner, so as to enhance the heating capacity of the air conditioner and improve the practicability of the air conditioner.

[0042] like Figure 3 and Figure 4 As shown, the air inlet sub-shell segment 201 and the air outlet sub-shell segment 203 are both cylindrical, and the opening area of ​​the first air outlet 12 is larger than the opening area of ​​the second air outlet 13. In this way, the processing and manufacturing of the air inlet sub-shell segment 201 and the air outlet sub-shell segment 203 are facilitated, and the processing and manufacturing cost of the air duct component is reduced; in addition, the opening area of ​​the first air outlet 12 is larger than the opening area of ​​the second air outlet 13, so that the second air outlet 13 can inlet air at high pressure, and the first air outlet 12 can discharge air over a large area.

[0043] It should be supplemented that, in the above two embodiments, the first-stage mixed flow blades 20 and the second-stage mixed flow blades 30 are installed in the same direction, that is, the first-stage mixed flow blades 20 and the second-stage mixed flow blades 30 are installed in an axially spaced manner in the flow cavity 11, so that the work done by the first-stage mixed flow blades 20 or the second-stage mixed flow blades 30 on the airflow can be reliably superimposed, thereby improving the air outlet effect of the air duct assembly.

[0044] It should also be noted that, in an optional embodiment not shown in the figure of the present application, the shell 10 of the air duct assembly includes a first shell 100 and a second shell 200, the first shell 100 and the second shell 200 selectively cover the first-stage mixed flow blade 20 and the second-stage mixed flow blade 30 of the air duct assembly, the first shell 100 and the second shell 200 are assembled or disassembled in a spliced ​​form, and when one of the first shell 100 and the second shell 200 is in a spliced ​​state, the other of the first shell 100 and the second shell 200 is in a disassembled state. In this way, there is always only one group of first-level mixed flow blades 20 and second-level mixed flow blades 30 working in the shell of the air conditioner. The working mode of the air conditioner is changed by switching the form of the shell 10 located outside the group of first-level mixed flow blades 20 and second-level mixed flow blades 30. That is, when the first shell 100 covers the first-level mixed flow blades 20 and second-level mixed flow blades 30, the air conditioner works in the cooling mode; when the second shell 200 covers the first-level mixed flow blades 20 and second-level mixed flow blades 30, the air conditioner works in the heating mode. This type of air conditioner design is not only conducive to miniaturized design, but also improves the intelligent working ability of the air conditioner.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0047] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air duct assembly, characterized in that: Used in an air conditioner, the air duct assembly comprises: A housing (10), the housing (10) comprising a flow chamber (11) and a first air port (12) and a second air port (13) in communication with the flow chamber (11), wherein the flow chamber (11) comprises a first-level flow sub-chamber (111) and a second-level flow sub-chamber (112) in communication with each other in a direction from the first air port (12) to the second air port (13); a first-stage mixed flow fan blade (20), the first-stage mixed flow fan blade (20) being rotatably disposed in the first-stage flow sub-cavity (111); a secondary mixed flow blade (30), the secondary mixed flow blade (30) being rotatably disposed in the secondary flow sub-cavity (112); the housing (10) of the air duct assembly comprising a first housing (100) and a second housing (200); the first housing (100) and the second housing (200) having different flow cavity structures; The first-level mixed flow blade (20) and the second-level mixed flow blade (30) rotate in a first direction to guide the wind from the first air outlet (12) to the second air outlet (13), and at this time, the first shell (100) covers the first-level mixed flow blade (20) and the second-level mixed flow blade (30); The first-level mixed flow blade (20) and the second-level mixed flow blade (30) rotate in a second direction opposite to the first direction to achieve wind flow guidance from the second air outlet (13) to the first air outlet (12), and at this time, the second shell (200) covers the first-level mixed flow blade (20) and the second-level mixed flow blade (30); The first shell (100) and the second shell (200) are assembled or disassembled in a spliced ​​form, and when one of the first shell (100) and the second shell (200) is in a spliced ​​state, the other of the first shell (100) and the second shell (200) is in a disassembled state, so that only one group of the first mixed flow blades (20) and the second mixed flow blades (30) are always in operation in the outer shell of the air conditioner, and the operating mode of the air conditioner is changed by switching the form of the shell (10) located outside the group of the first mixed flow blades (20) and the second mixed flow blades (30).

2. The air duct assembly according to claim 1, characterized in that: The shell (10) is a rotating body structure, the first air outlet (12) and the second air outlet (13) are respectively located at two ends of an axis of the shell (10), and the first-stage mixed flow blade (20) and the second-stage mixed flow blade (30) rotate around the axis of the shell (10).

3. The air duct assembly according to claim 1, characterized in that: When the primary mixed flow blade (20) and the secondary mixed flow blade (30) rotate in the same direction, the rotation speeds of the primary mixed flow blade (20) and the secondary mixed flow blade (30) are equal or they rotate at a differential speed.

4. The air duct assembly according to any one of claims 1 to 3, characterized in that: The first housing (100) comprises: a first sub-shell segment (101), the first sub-shell segment (101) having the first air port (12) and the first-level flow sub-cavity (111), the cross-sectional area of ​​the first-level flow sub-cavity (111) first gradually increases and then gradually decreases in a direction away from the first air port (12); The second sub-shell segment (102) is connected to the first sub-shell segment (101), the second sub-shell segment (102) having the second air port (13) and the secondary flow sub-cavity (112), the cavity cross-sectional area of ​​the secondary flow sub-cavity (112) first gradually increases and then gradually decreases in a direction approaching the second air port (13).

5. The air duct assembly according to any one of claims 1 to 3, characterized in that: The second shell (200) comprises an air inlet sub-shell segment (201), a transition sub-shell segment (202) and an air outlet sub-shell segment (203) connected in sequence, wherein the air inlet sub-shell segment (201) has the second air outlet (13), the cavity cross-sectional area of ​​the transition sub-shell segment (202) gradually increases in a direction away from the air inlet sub-shell segment (201), and the air outlet sub-shell segment (203) has the primary flow sub-cavity (111) and the secondary flow sub-cavity (112) with equal cavity cross-sectional areas, as well as the first air outlet (12).

6. The air duct assembly according to claim 5, characterized in that: The air inlet sub-shell section (201) and the air outlet sub-shell section (203) are both cylindrical, and the opening area of ​​the first air outlet (12) is greater than the opening area of ​​the second air outlet (13).

7. An air conditioner, characterized in that: The invention comprises a housing and an air duct assembly arranged in the housing, wherein the air duct assembly is the air duct assembly according to any one of claims 1 to 6.

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