Air duct assembly and air conditioner having the same

Abstract

The present invention discloses an air duct assembly and an air conditioner having the same. The air duct assembly includes: a first housing having a receiving cavity therein, a plurality of air outlets communicating with the receiving cavity provided on the peripheral wall of the first housing, and an air duct inlet provided on one axial end face of the first housing; a fan assembly including a motor and a centrifugal impeller, the centrifugal impeller being disposed in the receiving cavity, and the output shaft of the motor being connected to the centrifugal impeller. According to the air duct assembly of the present invention, axial air intake and radial air outlet can be achieved, making the structure of the air duct assembly simpler and more compact. In addition, by providing a plurality of spaced-apart air outlets, the air velocity at each air outlet can be increased, the air supply distance can be increased, and the needs of users can be met. In addition, the plurality of air outlets can disperse the air to achieve a soft air feeling.

Description

Technical Field

[0001] The present invention relates to the technical field of air handling equipment, and more particularly to an air duct assembly and an air conditioner having the same. Background Art

[0002] In related technologies, the air outlet speed of the air duct assembly of an air conditioner is small, and the air supply distance is not far enough, which cannot meet the user's usage requirements. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an air duct assembly, which can achieve axial air inlet and radial air outlet and has a relatively long air supply distance.

[0004] The present invention also provides an air conditioner, which includes the above-mentioned air duct assembly.

[0005] The air duct assembly according to an embodiment of the present invention includes: a first housing having an accommodation cavity therein, a plurality of air outlets communicating with the accommodation cavity are provided on the peripheral wall of the first housing, and an air duct inlet is provided on an axial end surface of the first housing; a fan assembly including a motor and a centrifugal impeller, the centrifugal impeller is disposed in the accommodation cavity, and an output shaft of the motor is connected to the centrifugal impeller.

[0006] In the air duct assembly according to an embodiment of the present invention, by providing an air duct inlet on an axial end surface of the accommodation cavity of the first housing, a plurality of air outlets are provided on the peripheral wall of the accommodation cavity, and the centrifugal impeller is disposed in the accommodation cavity, the air flow entering from the air duct inlet can be radially ejected from the centrifugal impeller and then discharged from the air outlets on the peripheral wall of the accommodation cavity, so that the air duct assembly can achieve axial air inlet and radial air outlet, and the structure of the air duct assembly is simpler and more compact. In addition, by providing a plurality of spaced-apart air outlets, the air speed of each air outlet can be increased, the air supply distance can be increased, and the user's requirements can be met. In addition, the plurality of air outlets can disperse the air to achieve a soft air feeling.

[0007] According to some embodiments of the present invention, the plurality of air outlets are spaced apart along the circumferential direction of the first housing.

[0008] According to some embodiments of the present invention, the surface where each air outlet is located is parallel to the axis of the first housing.

[0009] According to some embodiments of the present invention, a plurality of protruding portions are provided on the outer peripheral wall of the first housing, the plurality of protruding portions correspond to the plurality of air outlets one by one, the protruding portions define an air outlet passage, one end of the air outlet passage communicates with the accommodation cavity, and the other end of the air outlet passage is configured as the air outlet.

[0010] In some embodiments of the present invention, a plurality of the air outlets are located on the same plane.

[0011] In some embodiments of the present invention, the axes of a plurality of the air outlet channels are parallel.

[0012] According to some embodiments of the present invention, the cross-section of the air outlet is formed into a circle, an ellipse or a polygon.

[0013] According to some embodiments of the present invention, the edge of at least one of the air outlets away from the air duct inlet is flush with the axial end face of the first housing away from the air duct inlet.

[0014] According to some embodiments of the present invention, the area enclosed by the outer contour line of each of the air outlets can accommodate at least one area of a circle with a diameter of 8 mm.

[0015] According to some embodiments of the present invention, the centrifugal air impeller has an air impeller inlet opposite to the air duct inlet, the diameter of the air impeller inlet is D, and the distance between the surface of the centrifugal air impeller away from the air duct inlet and the wall surface of the accommodation cavity away from the air duct inlet is H, and H satisfies: H≥0.02D.

[0016] In some embodiments of the present invention, in the direction from the end of the accommodation cavity away from the air outlet to the end close to the air outlet, the distance between the surface of the centrifugal air impeller away from the air duct inlet and the wall surface of the accommodation cavity away from the air duct inlet gradually increases.

[0017] In some embodiments of the present invention, the distance between the end of the surface of the centrifugal air impeller away from the air duct inlet away from the air outlet and the wall surface of the accommodation cavity away from the air duct inlet is H1, and the distance between the end of the surface of the centrifugal air impeller away from the air duct inlet close to the air outlet and the wall surface of the accommodation cavity away from the air duct inlet is H2, and it satisfies: H1≤H2≤5H1.

[0018] According to some embodiments of the present invention, the centrifugal air impeller has an air impeller inlet opposite to the air duct inlet, the diameter of the air impeller inlet is D, and the total projected area of a plurality of the air outlets in a plane parallel to and perpendicular to the axis of the centrifugal air impeller is S, and it satisfies: S<πD 2 / 4.

[0019] According to some embodiments of the present invention, a receiving groove is provided on the wall surface of the accommodation cavity away from the air duct inlet, and the motor is arranged in the receiving groove.

[0020] According to some embodiments of the present invention, the motor is disposed outside the first housing and connected to the first housing, and an output shaft of the motor passes through the air duct inlet and is connected to the centrifugal impeller.

[0021] An air conditioner according to an embodiment of the present invention includes: a second housing, an air inlet passage is defined inside the second housing, and an air inlet communicating with the air inlet passage is provided on the second housing; a heat exchanger, the heat exchanger is disposed in the air inlet passage and opposite to the air inlet; the above-mentioned air duct assembly, the first housing is connected to the second housing, and the air duct inlet is communicated with the air inlet passage.

[0022] In the air conditioner according to the embodiment of the present invention, by providing an air duct inlet at an axial end face of the accommodation cavity of the first housing, a plurality of air outlets are provided on the peripheral wall of the accommodation cavity, and the centrifugal impeller is disposed in the accommodation cavity, so that the air flow entering from the air duct inlet is radially thrown out by the centrifugal impeller and then discharged from the air outlets on the peripheral wall of the accommodation cavity, which can enable the air duct assembly to achieve axial air intake and radial air outlet, making the structure of the air duct assembly simpler and more compact. In addition, by providing a plurality of spaced-apart air outlets, the air speed of each air outlet can be increased, the air supply distance can be increased, and the user's needs can be met. In addition, the plurality of air outlets can disperse the air to achieve a soft air feeling.

[0023] According to some embodiments of the present invention, the second housing includes: a chassis; a support shell, the support shell is disposed on the chassis, the support shell and the chassis jointly define the air inlet passage, the air inlet communicating with the air inlet passage is formed on a side wall of the support shell, the heat exchanger is disposed at the air inlet, and the first housing is located above the support shell and connected to the support shell.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0026] Figure 1 is a perspective view of a partial structure of an air conditioner according to an embodiment of the present invention;

[0027] Figure 2 is a front view of a partial structure of an air conditioner according to an embodiment of the present invention;

[0028] Figure 3 is along Figure 2 sectional view taken along line A-A in

[0029] Figure 4 is a sectional view along line B-B in Figure 2 ;

[0030] Figure 5 is a side view of a partial structure of an air conditioner according to an embodiment of the present invention;

[0031] Figure 6 is a top view of a partial structure of an air conditioner according to an embodiment of the present invention;

[0032] Figure 7 is a perspective view of a centrifugal impeller according to an embodiment of the present invention;

[0033] Figure 8 is a front view of a centrifugal impeller according to an embodiment of the present invention.

[0034] Reference numerals:

[0035] Air conditioner 100,

[0036] Air duct assembly 10,

[0037] First housing 1a, accommodation cavity 11a, air outlet 111, air duct inlet 112, protruding portion 113, air outlet passage 1131,

[0038] Fan assembly 2a, centrifugal impeller 211, impeller inlet 2111, motor 212, disk 222, blade 223, fixing ring 224,

[0039] Second housing 20, air inlet passage 201, support housing 202, chassis 203,

[0040] Heat exchanger 4a. Detailed implementation manners

[0041] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0042] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0043] The air duct assembly 10 according to an embodiment of the present invention will be described below with reference to the drawings.

[0044] As shown Figures 1 - 4 in FIG. Figures 1 - 4 , the air duct assembly 10 according to an embodiment of the present invention includes a first housing 1a and a fan assembly 2a.

[0045] Specifically, the first housing 1a has a receiving cavity 11a. Optionally, as Figure 4 shown in FIG. Figure 4 , the cross-section of the receiving cavity 11a is circular. Of course, the present invention is not limited thereto, and the cross-section of the receiving cavity 11a may also be oval or polygonal, etc. As Figure 1 and Figure 3 shown in FIG. Figure 3 , a plurality of air outlets 111 communicating with the receiving cavity 11a are provided on the peripheral wall of the first housing 1a, and an air duct inlet 112 is provided on an axial end surface of the first housing 1a. Among them, the cross-sectional area of the air duct inlet 112 may be smaller than the cross-sectional area of the receiving cavity 11a, and the cross-sectional area of the air duct inlet 112 may also be equal to the cross-sectional area of the receiving cavity 11a, that is, an axial end surface of the receiving cavity 11a is completely open to form the air duct inlet 112. Airflow can enter the receiving cavity 11a from the air duct inlet 112 and then be discharged from the air outlets 111.

[0046] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0047] As Figure 3 shown in FIG. Figure 3 , the fan assembly 2a includes a motor 212 and a centrifugal impeller 211. The centrifugal impeller 211 is arranged in the receiving cavity 11a, and the output shaft of the motor 212 is connected to the centrifugal impeller 211 to drive the centrifugal impeller 211 to rotate. Further, the axis of the air duct inlet 112 and the axis of the inlet of the centrifugal impeller 211 may be parallel or coincident. Correspondingly, the axis of the centrifugal impeller 211 is parallel or coincident with the axis of the air duct inlet 112. Of course, the axis of the centrifugal impeller 211 may also have a small included angle with the axis of the air duct inlet 122, as long as it can ensure that the airflow at the air duct inlet 112 can enter the centrifugal impeller 211.

[0048] During the working process of the air duct assembly 10, the airflow enters from the air duct inlet 112. Under the action of the centrifugal impeller 211, it is pressurized by the centrifugal impeller 211 and radially ejected from the centrifugal impeller 211. A part of the ejected high-pressure airflow can be directly ejected from the air outlets 111, which can reduce the noise during the airflow movement, and the other part is guided and redirected by the receiving cavity 11a and then ejected from the air outlets 111.

[0049] The air duct assembly 10 according to an embodiment of the present invention has an air duct inlet 112 provided at one axial end face of the accommodation cavity 11a of the first housing 1a, a plurality of air outlet openings 111 provided on the peripheral wall of the accommodation cavity 11a, and a centrifugal impeller 211 provided in the accommodation cavity 11a. This enables the airflow entering from the air duct inlet 112 to be radially ejected from the centrifugal impeller 211 and then discharged from the air outlet openings 111 on the peripheral wall of the accommodation cavity 11a, allowing the air duct assembly 10 to achieve axial air intake and radial air outlet, making the structure of the air duct assembly 10 simpler and more compact. Additionally, by providing a plurality of spaced-apart air outlet openings 111, the air velocity at each air outlet opening 111 can be increased, the air supply distance can be increased, and the needs of users can be met. Moreover, the plurality of air outlet openings 111 can disperse the air to achieve a soft air feeling.

[0050] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the plurality of air outlet openings 111 are spaced apart along the circumferential direction of the first housing 1a. This can enable the air duct assembly 10 to have a larger air outlet range in the circumferential direction of the first housing 1a, meeting the needs of users. Additionally, when the air duct assembly 10 is applied to an air conditioner 100, the refrigeration or heating effect of the air conditioner 100 can be improved.

[0051] Optionally, as Figure 5 and Figure 6 shown, the surface where each air outlet opening 111 is located is parallel to the axis of the first housing 1a. This can simplify the structure of the first housing 1a and enable the air outlet from the air outlet openings 111 to be more uniform. Here, the surface where the air outlet opening 111 is located is the surface defined by the outer contour of the air outlet opening 111. Optionally, the surface where the air outlet opening 111 is located can be a flat surface or an arc surface. Preferably, as Figure 5 and Figure 6 shown, the surface where the air outlet opening 111 is located is a flat surface, which can further simplify the structure of the first housing 1a and thus simplify the structure of the air duct assembly 10.

[0052] As Figure 1 、 Figure 3 and Figure 4 , a plurality of protruding portions 113 are provided on the outer peripheral wall of the first housing 1a. The plurality of protruding portions 113 correspond to the plurality of air outlet openings 111 one by one. The protruding portion 113 defines an air outlet passage 1131. One end of the air outlet passage 1131 communicates with the accommodation cavity 11a, and the other end of the air outlet passage 1131 is configured as the air outlet opening 111. This facilitates the setting of the air outlet opening 111, enables the orientation of the air outlet opening 111 to be more flexible, and can better meet the needs of users.

[0053] Furthermore, as Figure 4 and Figure 6As shown, a plurality of air outlets 111 are located on the same plane. It can be understood that the surface where each air outlet 111 is located is a plane, and the plurality of planes where the plurality of air outlets 111 are located coincide. This can make the structure of the first housing 1a simpler, simplify the processing technology of the first housing 1a, and improve production efficiency.

[0054] Furthermore, as Figure 4 and Figure 6 shown, the axes of the plurality of air outlet channels 1131 are parallel. This can make the air outlet directions of the plurality of air outlets 111 the same, make the air blown by the air duct assembly 10 towards the target area more concentrated, be conducive to increasing the air volume in this direction, and meet the user's usage requirements.

[0055] Optionally, the cross-section of the air outlet 111 is formed into a circle, an ellipse or a polygon. This can increase the diversity of the structure of the air duct assembly 10. For example, in the example shown in Figure 2 , the cross-section of the air outlet 111 is generally formed into a quadrilateral, and the four sides of the quadrilateral are connected by smooth curves.

[0056] In some embodiments of the present invention, the edge of at least one air outlet 111 away from the air duct inlet 112 is flush with the axial end face of the first housing 1a away from the air duct inlet 112. This facilitates the air flow in the accommodation cavity 11a to flow towards the air outlet 111 along the wall surface of the accommodation cavity 11a away from the air duct inlet 112, reduces the resistance of the air flow, and thus reduces the noise during the air flow process.

[0057] In some embodiments of the present invention, the area enclosed by the outer contour line of each air outlet 111 can accommodate at least one area of a circle with a diameter of 8 mm. For example, the air outlet 111 can be a circular hole with a diameter greater than or equal to 8 mm, or a long strip hole, and there is a position where the width of the long strip hole is greater than or equal to 8 mm to accommodate a circular area with a diameter of 8 mm. This can achieve long-distance air supply.

[0058] In some embodiments of the present invention, the centrifugal impeller 211 has an impeller inlet 2111 opposite to the air duct inlet 112, the diameter of the impeller inlet 2111 is D, and the distance between the surface of the centrifugal impeller 211 away from the air duct inlet 112 and the wall surface of the accommodation cavity 11a away from the air duct inlet 112 is H, and H satisfies: H≥0.02D. This can make the air flow radially ejected from the centrifugal impeller 211 flow smoothly along the gap between the wall surface of the accommodation cavity 11a away from the air duct inlet 112 and the surface of the centrifugal impeller 211 away from the air duct inlet 112 towards the air outlet 111, ensure the smoothness of the air flow, and reduce the noise during the air flow process.

[0059] It should be noted that as Figure 7 andFigure 8 As shown, the centrifugal impeller 211 generally includes a disk 222, blades 223 and a fixing ring 224. The disk 222 is formed into a circular plate-like structure. There are multiple blades 223, and the multiple blades 223 are spaced apart along the circumferential direction of the disk 222. One end of each blade 223 is connected to the disk 222, the fixing ring 224 is spaced apart from the disk 222, the other end of each blade 223 is connected to the fixing ring 224, and the space defined by the inner peripheral wall of the fixing ring 224 is the impeller inlet 2111.

[0060] Further, as Figure 3 shown, the air outlet 111 is provided at one end of the first housing 1a. In the direction from the end of the accommodation chamber 11a far from the air outlet 111 to the end close to the air outlet 111, the distance between the surface of the centrifugal impeller 211 far from the air duct inlet 112 and the wall surface of the accommodation chamber 11a far from the air duct inlet 112 gradually increases. Since a part of the air flow radially ejected from the position of the centrifugal impeller 211 opposite to the air outlet 111 directly flows to the air outlet 111, and the air flow radially ejected from the position of the centrifugal impeller 211 far from the air outlet 111 also flows to the air outlet 111 through the guiding action of the wall surfaces of the centrifugal impeller 211 and the accommodation chamber 11a, and in the direction from the end of the accommodation chamber 11a far from the air outlet 111 to the end close to the air outlet 111, the distance between the surface of the centrifugal impeller 211 far from the air duct inlet 112 and the wall surface of the accommodation chamber 11a far from the air duct inlet 112 gradually increases, more space can be provided for the air flow to flow out at the position close to the air outlet 111, avoiding the impact of the air flow here to generate eddy currents, facilitating the flow of the air flow, and at the same time reducing the noise generated by the air flow.

[0061] Furthermore, as Figure 3 shown, the distance between the end of the surface of the centrifugal impeller 211 far from the air duct inlet 112 and far from the air outlet 111 and the wall surface of the accommodation chamber 11a far from the air duct inlet 112 is H1, and the distance between the end of the surface of the centrifugal impeller 211 far from the air duct inlet 112 and close to the air outlet 111 and the wall surface of the accommodation chamber 11a far from the air duct inlet 112 is H2, and it satisfies: H1 ≤ H2 ≤ 5H1. Thus, more space can be further provided for the air flow to flow out at the position close to the air outlet 111, avoiding the impact of the air flow here to generate eddy currents, facilitating the flow of the air flow, and at the same time reducing the noise generated by the air flow.

[0062] In some embodiments of the present invention, the centrifugal impeller 211 has an impeller inlet 2111 opposite to the air duct inlet 112. The diameter of the impeller inlet 2111 is D, and the total projected area of the multiple air outlets 111 in a plane parallel to and perpendicular to the axis of the centrifugal impeller 211 is S, and it satisfies: S < πD 2 / 4. Thus, the air outlet area of the air duct assembly 10 can be made smaller than the air inlet area, which can increase the air outlet speed at the air outlet 111 of the air duct assembly 10 and improve the air supply distance.

[0063] Specifically, according to Q (air volume) = S (area) · V (air speed), at the same air volume, the smaller the air outlet area, the greater the air outlet speed. Therefore, at the same air volume, the air can be sent farther. When the air duct assembly 10 is applied to the air conditioner 100, it can achieve better cooling or heating effects. At the same time, according to Bernoulli's equation, for an incompressible fluid, we have: ρgh + 0.5ρv2 + p = C, that is: gravitational potential energy + kinetic energy + pressure potential energy = constant. For a gas, the gravitational potential energy can be ignored. Therefore, the greater the kinetic energy, the smaller the pressure. Therefore, for a high-speed jet, a significant low pressure will be formed in the jet area, and this low pressure will have an adsorption and traction effect on the surrounding air, thereby increasing the total air flow rate and further achieving the effect of long-distance air supply.

[0064] It should be noted that the total area S is the sum of the air outlet areas of multiple air outlets 111. The air outlet area of each air outlet 111 is the projected area of the air outlet 111 on a plane parallel to the axis of the centrifugal impeller 211 and perpendicular to the axis of the air outlet 111. The axis of the air outlet 111 refers to a straight line in the radial direction of the first housing 1a passing through the center of the air outlet 111.

[0065] In some embodiments of the present invention, a receiving groove is provided on the wall surface of the receiving cavity 11a away from the air duct inlet 112, and the motor 212 is arranged in the receiving groove, and the output shaft of the motor 212 is connected to the centrifugal impeller 211. This can make the structure of the air duct assembly 10 more compact and reasonable. Of course, the present invention is not limited to this. As Figure 3 shown, the motor 212 is arranged outside the first housing 1a and connected to the first housing 1a, and the output shaft of the motor 212 passes through the air duct inlet 112 and is connected to the centrifugal impeller 211. This can simplify the structure of the air duct assembly 10 and facilitate the assembly of the air duct assembly 10. Among them, the motor 212 can be directly connected to the first housing 1a or indirectly connected.

[0066] Next, the air conditioner 100 according to an embodiment of the present invention will be described.

[0067] As Figure 1 、 Figure 5 and Figure 6 shown, the air conditioner 100 according to an embodiment of the present invention includes a second housing 20, a heat exchanger 4a, and the above-mentioned air duct assembly 10.

[0068] Specifically, as Figure 3As shown, an air inlet passage 201 is defined within the second housing 20. The second housing 20 has an air inlet communicating with the air inlet passage 201. The heat exchanger 4a is disposed within the air inlet passage 201 and is opposite to the air inlet. The first housing 1a is connected to the second housing 20, and the air duct inlet 112 communicates with the air inlet passage 201. Air enters the air inlet passage 201 from the air inlet, exchanges heat with the heat exchanger 4a within the air inlet passage 201. The air after heat exchange enters the air duct inlet 112, and under the action of the centrifugal impeller 211, enters the impeller inlet 2111. After being pressurized by the centrifugal impeller 211, it flows out into the accommodation cavity 11a. A part of the air flow directly discharges from the air outlet 111, and a part of the air flow discharges from the air outlet 111 after being deflected by the accommodation cavity 11a.

[0069] This can enable the air flow within the accommodation cavity 11a to be sent out along the radial direction of the centrifugal impeller 211, realizing axial air inlet and radial air outlet of the air duct assembly 10. In addition, by providing a plurality of spaced-apart air outlets 111, the air speed of each air outlet 111 can be increased, the air supply distance can be increased, and the needs of users can be met.

[0070] For the air conditioner 100 according to an embodiment of the present invention, by providing the air duct inlet 112 on an axial end surface of the accommodation cavity 11a of the first housing 1a, providing a plurality of air outlets 111 on the peripheral wall of the accommodation cavity 11a, and disposing the centrifugal impeller 211 within the accommodation cavity 11a, the air flow entering from the air duct inlet 112 can be thrown out radially from the centrifugal impeller 211 and discharged from the air outlets 111 on the peripheral wall of the accommodation cavity 11a under the action of the centrifugal impeller 211, enabling the air duct assembly 10 to achieve axial air inlet and radial air outlet, making the structure of the air duct assembly 10 simpler and more compact. In addition, by providing a plurality of spaced-apart air outlets 111, the air speed of each air outlet 111 can be increased, the air supply distance can be increased, and the needs of users can be met. In addition, the plurality of air outlets 111 can disperse the air, realizing a soft air feeling.

[0071] In some embodiments of the present invention, the first housing 1a is located above the second housing 20, the air duct inlet 112 faces downward, the air inlet is provided on the peripheral wall of the second housing 20, and the heat exchanger 4a is disposed within the second housing 20 and is opposite to the air inlet. During the operation of the air conditioner 100, air enters the air inlet passage 201 within the second housing 20 from the air inlet, then flows upward to the air duct inlet 112, and finally is discharged from the air outlet 111 along the radial direction of the centrifugal impeller 211 under the action of the centrifugal impeller 211.

[0072] Further, as Figure 1As shown in the figure, the second housing 20 includes a support housing 202 and a chassis 203. The support housing 202 is disposed on the chassis 203. The support housing 202 and the chassis 203 jointly define an air inlet passage 201. An air inlet communicating with the air inlet passage 201 is formed on the side wall of the support housing 202. The heat exchanger 4a is disposed at the air inlet. The first housing 1a is located above the support housing 202 and is connected to the support housing 202, and the air duct inlet 112 faces downward. During the operation of the air conditioner 100, air enters the air inlet passage 201 in the second housing 20 from the air inlet. Under the guiding action of the air inlet passage 201, the air flows upward to the air duct inlet 112, and finally is discharged from the air outlet 111 along the radial direction of the centrifugal impeller 211 under the action of the centrifugal impeller 211. Thereby, the heat exchange efficiency of the air conditioner can be improved.

[0073] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0074] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0075] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air duct assembly, characterized in that, Comprising: A first housing having a receiving cavity therein, the outer peripheral wall of the first housing being provided with a plurality of air outlets communicating with the receiving cavity, an air duct inlet being provided on an axial end surface of the first housing, the air duct assembly having axial air inlet and radial air outlet; A fan assembly including a motor and a centrifugal impeller, the centrifugal impeller being disposed in the receiving cavity, the output shaft of the motor being connected to the centrifugal impeller; The edge of at least one of the air outlets remote from the air duct inlet is flush with the axial end surface of the first housing remote from the air duct inlet, and in the direction from the end of the receiving cavity remote from the air outlet to the end close to the air outlet, the distance between the surface of the centrifugal impeller remote from the air duct inlet and the wall surface of the receiving cavity remote from the air duct inlet gradually increases.

2. The air duct assembly according to claim 1, wherein The plurality of air outlets are spaced apart in the circumferential direction of the first housing.

3. The air duct assembly according to claim 1, characterized in that, The surface where each air outlet is located is parallel to the axis of the first housing.

4. The air duct assembly according to claim 1, wherein A plurality of protruding portions are provided on the outer peripheral wall of the first housing, the plurality of protruding portions corresponding to the plurality of air outlets one by one, the protruding portions defining an air outlet passage, one end of the air outlet passage communicating with the receiving cavity, and the other end of the air outlet passage being configured as the air outlet.

5. The air duct assembly according to claim 4, characterized in that The plurality of air outlets are located in the same plane.

6. The air duct assembly according to claim 4, wherein The axes of the plurality of air outlet passages are parallel.

7. The air duct assembly according to claim 1, wherein The cross-section of the air outlet is formed as a circle, an ellipse or a polygon.

8. The air duct assembly according to claim 1, wherein, The area enclosed by the outer contour line of each air outlet can accommodate at least one area of a circle with a diameter of 8 mm.

9. The air duct assembly according to claim 1, characterized in that, The centrifugal impeller has an impeller inlet opposite to the air duct inlet, the diameter of the impeller inlet being D, and the distance between the surface of the centrifugal impeller remote from the air duct inlet and the wall surface of the receiving cavity remote from the air duct inlet being H, where H satisfies: H ≥ 0.02D.

10. The air duct assembly according to claim 1, characterized in that, The distance between the end of the surface of the centrifugal impeller remote from the air duct inlet remote from the air outlet and the wall surface of the receiving cavity remote from the air duct inlet is H1, and the distance between the end of the surface of the centrifugal impeller remote from the air duct inlet close to the air outlet and the wall surface of the receiving cavity remote from the air duct inlet is H2, and it satisfies: H1 ≤ H2 ≤ 5H1.

11. The air duct assembly according to claim 1, wherein, The centrifugal impeller has an impeller inlet opposite to the inlet of the air duct. The diameter of the impeller inlet is D. The total projected area of a plurality of the air outlets in a plane parallel to and perpendicular to the axis of the centrifugal impeller is S, and it satisfies: S < πD 2 / 4.

12. The air duct assembly according to claim 1, wherein A receiving groove is provided on the wall surface of the receiving cavity remote from the air duct inlet, and the motor is disposed in the receiving groove.

13. The air duct assembly according to claim 1, characterized in that, The motor is disposed outside the first housing and connected to the first housing, and the output shaft of the motor passes through the air duct inlet and is connected to the centrifugal impeller.

14. An air conditioner, characterized in that, Comprising: A second housing defining an air inlet passage therein, the second housing having an air inlet communicating with the air inlet passage; A heat exchanger disposed in the air inlet passage and opposite to the air inlet; The air duct assembly according to any one of claims 1-13, the first housing being connected to the second housing, and the air duct inlet communicating with the air inlet passage.

15. The air conditioner according to claim 14, wherein, The second housing includes: A chassis; Support shell, the support shell is arranged on the chassis, the support shell and the chassis jointly define the air inlet channel, the air inlet communicated with the air inlet channel is formed on the side wall of the support shell, the heat exchanger is arranged at the air inlet, and the first shell is located above the support shell and connected with the support shell.

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