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 comprises: a first shell, a housing cavity is provided in the first shell, an air outlet connected to the housing cavity is provided on the peripheral wall of the first shell, the air outlet is in the shape of a slit, and an air duct inlet is provided on an axial end face of the first shell; a fan assembly, the fan assembly comprises a motor and a centrifugal wind wheel, the centrifugal wind wheel is provided in the housing cavity, and the output shaft of the motor is connected to the centrifugal wind wheel. According to the air duct assembly of the present invention, the air duct assembly can realize axial air intake and radial air outlet, so that the structure of the air duct assembly is simpler and more compact. In addition, the provision of a slit-shaped air outlet can increase the wind speed of the air outlet, increase the air supply distance, and meet the needs of users.

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. For this purpose, the present invention provides an air duct assembly, which can achieve axial air inlet and radial air outlet, and can increase the 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, an air outlet communicating with the accommodation cavity provided on the peripheral wall of the first housing, the air outlet being in a slit shape, and an air duct inlet provided on one axial end surface of the first housing; a fan assembly including a motor and a centrifugal impeller, the centrifugal impeller being disposed in the accommodation cavity, and an output shaft of the motor being connected to the centrifugal impeller.

[0006] With the air duct assembly according to an embodiment of the present invention, by providing an air duct inlet on one axial end surface of the accommodation cavity of the first housing, a slit-shaped air outlet provided on the peripheral wall of the accommodation cavity, and the centrifugal impeller 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 outlet on the peripheral wall of the accommodation cavity, so that the air duct assembly can achieve axial air inlet and radial air outlet, making the structure of the air duct assembly simpler and more compact. In addition, by providing a slit-shaped air outlet, the air velocity at the air outlet can be increased, the air supply distance can be increased, and the user's requirements can be met.

[0007] According to some embodiments of the present invention, the surface where the air outlet is located is parallel to the axis of the centrifugal impeller.

[0008] According to some embodiments of the present invention, a protruding portion is provided on the outer peripheral wall of the first housing, the protruding portion defines an air outlet channel, one end of the air outlet channel communicates with the accommodation cavity, and the other end of the air outlet channel is configured as the air outlet.

[0009] In some embodiments of the present invention, in the direction towards the air outlet, the width of the air outlet channel gradually decreases.

[0010] According to some embodiments of the present invention, the air outlet is an annular air outlet, and the axis of the annular air outlet is perpendicular to the axis of the first housing.

[0011] According to some embodiments of the present invention, the air outlet is formed as a straight line or a curve.

[0012] According to some embodiments of the present invention, there are a plurality of spaced-apart air outlets.

[0013] According to some embodiments of the present invention, the centrifugal impeller has an impeller inlet opposite to the air duct inlet, the diameter of the impeller inlet is D, the distance between the surface of the centrifugal 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.

[0014] 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 impeller away from the air duct inlet and the wall surface of the accommodation cavity away from the air duct inlet gradually increases.

[0015] In some embodiments of the present invention, the distance between the end of the surface of the centrifugal 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, the distance between the end of the surface of the centrifugal 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.

[0016] According to some embodiments of the present invention, the centrifugal impeller has an impeller inlet opposite to the air duct inlet, the diameter of the impeller inlet is D, the width of the air outlet is W, and it satisfies: 0<W≤0.1D.

[0017] According to some embodiments of the present invention, the total length of the air outlet is L, and L satisfies: 0.5D≤L≤10D.

[0018] Further, the width W, length L of the air outlet and the diameter D of the impeller inlet satisfy: LW<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 arranged 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.

[0021] In some embodiments of the present invention, a plurality of air guide plates are provided in the air outlet. The plurality of air guide plates are spaced apart along the length direction of the air outlet, and both ends of each air guide plate in the width direction are respectively connected to both ends of the air outlet in the width direction.

[0022] Further, along the air flow direction, the thickness of the air guide plate gradually decreases.

[0023] The air conditioner according to an embodiment of the present invention includes: a second housing, an air inlet passage is defined in 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.

[0024] The air conditioner according to an embodiment of the present invention, by providing an air duct inlet at an axial end surface of the accommodation cavity of the first housing, providing a slit-shaped air outlet on the peripheral wall of the accommodation cavity, and arranging a centrifugal air wheel in the accommodation cavity, can make the air flow entering from the air duct inlet be radially thrown out by the centrifugal air wheel and then discharged from the air outlet on the peripheral wall of the accommodation cavity, can make the air duct assembly achieve axial air inlet and radial air outlet, making the structure of the air duct assembly simpler and more compact. In addition, by providing a slit-shaped air outlet, the air speed at the air outlet can be increased, the air supply distance can be increased, and the needs of users can be met.

[0025] 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, an air inlet communicating with the air inlet passage is formed on the 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.

[0026] 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 understood through the practice of the present invention. Description of the Drawings

[0027] 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, in which:

[0028] Figure 1 is a perspective view of a partial structure of an air conditioner according to an embodiment of the present invention;

[0029] Figure 2 is a front view of a partial structure of an air conditioner according to an embodiment of the present invention;

[0030] Figure 3 is alongFigure 2 Cross-sectional view along line A-A in [the figure];

[0031] Figure 4 It is along Figure 2 Cross-sectional view along line B-B in [the figure];

[0032] Figure 5 Side view of a partial structure of an air conditioner according to an embodiment of the present invention;

[0033] Figure 6 Top view of a partial structure of an air conditioner according to an embodiment of the present invention.

[0034] Figure 7 Stereogram of a partial structure of an air conditioner according to another embodiment of the present invention;

[0035] Figure 8 Front view of a partial structure of an air conditioner according to another embodiment of the present invention;

[0036] Figure 9 It is along Figure 8 Cross-sectional view along line C-C in [the figure];

[0037] Figure 10 It is along Figure 8 Cross-sectional view along line D-D in [the figure];

[0038] Figure 11 Side view of a partial structure of an air conditioner according to another embodiment of the present invention;

[0039] Figure 12 Top view of a partial structure of an air conditioner according to another embodiment of the present invention

[0040] Figure 13 Stereogram of a centrifugal impeller according to an embodiment of the present invention;

[0041] Figure 14 Front view of a centrifugal impeller according to an embodiment of the present invention.

[0042] Reference numerals:

[0043] Air conditioner 100,

[0044] Air duct assembly 10,

[0045] First housing 1a, accommodation cavity 11a, air outlet 111, air deflector 1111, air duct inlet 112, protruding portion 113, air outlet channel 1131,

[0046] Fan assembly 2a, centrifugal impeller 211, impeller inlet 2111, motor 212, disk 222, blades 223, fixing ring 224,

[0047] The second housing 20, the air inlet passage 201, the support housing 202, the chassis 203,

[0048] The heat exchanger 4a. Detailed implementation manners

[0049] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring 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.

[0050] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "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.

[0051] The air duct assembly 10 according to an embodiment of the present invention will be described below with reference to the drawings.

[0052] As Figures 1 - 4 , Figures 7 - 10 shown, the air duct assembly 10 according to an embodiment of the present invention includes a first housing 1a and a fan assembly 2a.

[0053] Specifically, the first housing 1a has a receiving cavity 11a. Optionally, as Figure 4 and Figure 10 shown, 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 elliptical or polygonal, etc. As Figure 1 , Figure 3 , Figure 7 and Figure 9 shown, an air outlet 111 communicating with the receiving cavity 11a is provided on the peripheral wall of the first housing 1a. The air outlet 111 is in a slit shape, whereby the pressure of the air flow can be increased and the speed of the air flow can be increased, thereby increasing the air supply distance. As Figure 3 and Figure 9 shown, 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, or the cross-sectional area of the air duct inlet 112 may 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. The air flow can enter the receiving cavity 11a from the air duct inlet 112 and then be discharged from the air outlet 111.

[0054] As Figure 3 and Figure 9 shown, the fan assembly 2a includes a motor 212 and a centrifugal impeller 211. The centrifugal impeller 211 is arranged in the accommodation 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 air flow at the air duct inlet 112 can enter the centrifugal impeller 211.

[0055] During the operation of the air duct assembly 10, the air flow enters from the air duct inlet 112. Under the action of the centrifugal impeller 211, it is pressurized by the centrifugal impeller 211 and then radially thrown out from the centrifugal impeller 211. A part of the thrown high-pressure air flow can be directly ejected from the air outlet 111, which can reduce the noise during the air flow process, and the other part is guided and redirected by the accommodation cavity 11a and then ejected from the air outlet 111.

[0056] According to the air duct assembly 10 of the embodiment of the present invention, by providing the air duct inlet 112 at an axial end face of the accommodation cavity 11a of the first housing 1a, providing a slit-shaped air outlet 111 on the peripheral wall of the accommodation cavity 11a, and arranging the centrifugal impeller 211 in the accommodation cavity 11a, the air flow entering from the air duct inlet 112 can be radially thrown out from the centrifugal impeller 211 and then discharged from the air outlet 111 on the peripheral wall of the accommodation cavity 11a, so that the air duct assembly 10 can achieve axial air intake and radial air outlet, making the structure of the air duct assembly 10 simpler and more compact. In addition, by providing the slit-shaped air outlet 111, the air velocity at the air outlet 111 can be increased, the air supply distance can be increased, and the needs of users can be met.

[0057] In some embodiments of the present invention, as Figure 11 and Figure 12 shown, the surface where the air outlet 111 is located is parallel to the axis of the centrifugal impeller 211. This can simplify the structure of the first housing 1a and make the air outlet 111 air out more evenly. Wherein, the surface where the air outlet 111 is located is the surface defined by the outer contour of the air outlet 111. Optionally, the surface where the air outlet 111 is located may be a plane or an arc surface. Preferably, as Figure 11 and Figure 12 shown, the surface where the air outlet 111 is located is a plane, which can further simplify the structure of the first housing 1a and thus simplify the structure of the air duct assembly 10.

[0058] Of course, the present invention is not limited thereto, as Figure 5 andFigure 6 As shown, the surface where the air outlet 111 is located may have an angle with the axis of the centrifugal impeller 211. For example, in Figure 5 the example shown, in the direction from top to bottom, the surface where the air outlet 111 is located is inclined in the direction away from the axis of the first housing 1a. This can meet different needs of users.

[0059] In some embodiments of the present invention, such as Figure 1 , Figure 3 , Figure 4 , Figure 7 , Figure 9 and Figure 10 shown, a protruding portion 113 is provided on the outer peripheral wall of the first housing 1a, and 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 111. This facilitates the setting of the air outlet 111, can make the orientation of the air outlet 111 more flexible, and can better meet the needs of users.

[0060] Furthermore, as Figure 3 and Figure 9 shown, in the direction towards the air outlet 111, the width of the air outlet passage 1131 gradually decreases. It can be understood that in the direction towards the air outlet 111, the cross-sectional area of the air outlet passage 1131 gradually decreases, thereby increasing the pressure of the air flow and improving the air outlet speed of the air outlet 111, so as to increase the air supply distance.

[0061] Optionally, as Figure 7 and Figure 8 shown, the air outlet 111 is an annular air outlet, and the axis of the annular air outlet is perpendicular to the axis of the first housing 1a. This can increase the air outlet space of the air outlet 111 and improve the air outlet volume. For example, in Figure 7 the example shown, the air outlet 111 is formed as an oval ring. Of course, the present invention is not limited thereto, and the air outlet 111 can be formed as a straight line or a curve. This can increase the diversity of the structure of the air outlet 111. For example, in Figure 1 the example shown, the air outlet 111 is formed as a broken line shape, and the contour line of the air outlet 111 includes a first segment, a second segment, and a third segment connected in sequence. The second segment extends in the horizontal direction, and the first segment and the third segment are respectively located at both ends of the second segment and are both located above the second segment. The first segment and the third segment are both inclined towards each other in the direction from top to bottom.

[0062] Optionally, there may be a plurality of spaced-apart air outlets 111, and each air outlet 111 is formed as a slit shape. This can increase the diversity of the structure of the air duct assembly 10 and meet different needs of users. Each air outlet 111 can be formed as a straight line, a curve, or an annular shape.

[0063] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0064] Further, when there are a plurality of air outlets 111, the plurality of air outlets 111 may be 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, improve production efficiency, and can increase the uniformity of air outlet. In addition, a plurality of protruding portions 113 may be provided on the first housing 1a, and the plurality of protruding portions 113 correspond to the plurality of air outlets 111 one by one. Each protruding portion 113 defines an air outlet channel 1131, and the axes of the plurality of air outlet channels 1131 may be 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 beneficial to increasing the air volume in this direction, and meet the user's usage requirements.

[0065] 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 far from the air duct inlet 112 and the wall surface of the accommodation cavity 11a far from the air duct inlet 112 is H, and H satisfies: H≥0.02D. This can make the air flow radially thrown out from the centrifugal impeller 211 flow smoothly along the gap between the wall surface of the accommodation cavity 11a far from the air duct inlet 112 and the surface of the centrifugal impeller 211 far 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.

[0066] It should be noted that as Figure 13 and Figure 14 shown, the centrifugal impeller 211 generally includes a hub 222, blades 223 and a retaining ring 224. The hub 222 is formed as a circular plate-like structure. There are a plurality of blades 223, and the plurality of blades 223 are spaced apart along the circumferential direction of the hub 222. One end of the blade 223 is connected to the hub 222, the retaining ring 224 is spaced apart from the hub 222, the other end of the blade 223 is connected to the retaining ring 224, and the space defined by the inner peripheral wall of the retaining ring 224 is the impeller inlet 2111.

[0067] Further, as Figure 3 and Figure 9As shown, in the direction from the end of the accommodation cavity 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 cavity 11a far from the air duct inlet 112 gradually increases. Since a part of the air flow radially ejected from the position on 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 on 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 cavity 11a, and in the direction from the end of the accommodation cavity 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 cavity 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 air flow hitting and generating vortices here, facilitating the flow of the air flow, and at the same time reducing the noise generated by the air flow.

[0068] Furthermore, as Figure 3 and Figure 9 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 cavity 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 cavity 11a far from the air duct inlet 112 is H2, and it satisfies: H1≤H2≤5H1. This can further provide more space for the air flow to flow out at the position close to the air outlet 111, avoiding the air flow hitting and generating vortices here, facilitating the flow of the air flow, and at the same time reducing the noise generated by the air flow.

[0069] 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 width of the air outlet 111 is W, and it satisfies: 0 < W ≤ 0.1D. This can increase the pressure of the air flow, increase the speed of the air flow, and thus increase the air supply distance. Wherein, when there are multiple air outlets 111, the width W of each air outlet 111 satisfies 0 < W ≤ 0.1D.

[0070] Furthermore, the total length of the air outlet 111 is L, and L satisfies: 0.5D ≤ L ≤ 10D. Thus, the air outlet area can be increased, the air outlet air volume can be increased, and the user's usage requirements can be met. Wherein, when there are multiple air outlets 111, L is the sum of the lengths of the multiple air outlets 111.

[0071] Furthermore, the width W, length L of the air outlet 111 and the diameter D of the impeller inlet 2111 satisfy: LW < 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.

[0072] 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, there is: 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.

[0073] 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 and Figure 9 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.

[0074] In some embodiments of the present invention, as Figure 4 and Figure 10 shown, a plurality of air guide plates 1111 are provided in the air outlet 111, and the plurality of air guide plates 1111 are spaced apart along the length direction of the air outlet 111, and both ends in the width direction of each air guide plate 1111 are respectively connected to both ends in the width direction of the air outlet 111. This can play a role in guiding the air flow, making the air flow more evenly distributed in the air outlet 111 and improving the uniformity of air supply.

[0075] Further, as Figure 4 and Figure 10 shown, along the air flow direction, the thickness of the air guide plate 1111 gradually decreases. This can improve the air guiding effect of the air guide plate 1111, make the air flow discharged from the air outlet 111 more uniform, and improve the uniformity of air supply.

[0076] Next, the air conditioner 100 according to an embodiment of the present invention will be described.

[0077] AsFigure 1 , Figure 3 , Figure 7 and Figure 9 As shown in Figure 7 , Figure 9 , 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.

[0078] Specifically, an air inlet passage 201 is defined in 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 in the air inlet passage 201 and 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 in the air inlet passage 201. The air after heat exchange enters the air duct inlet 112 and enters the impeller inlet 2111 under the action of the centrifugal impeller 211. After being pressurized by the centrifugal impeller 211, the air flows out into the accommodation chamber 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 chamber 11a.

[0079] Thereby, the air flow in the accommodation chamber 11a can be sent out along the radial direction of the centrifugal impeller 211, realizing the axial air inlet and radial air outlet of the air duct assembly 10. In addition, by providing the slit-shaped air outlet 111, the air velocity at the air outlet 111 can be increased, the air supply distance can be increased, and the needs of users can be met.

[0080] For the air conditioner 100 according to an embodiment of the present invention, by providing the air duct inlet 112 at an axial end surface of the accommodation chamber 11a of the first housing 1a, providing the slit-shaped air outlet 111 on the peripheral wall of the accommodation chamber 11a, and disposing the centrifugal impeller 211 in the accommodation chamber 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 outlet 111 on the peripheral wall of the accommodation chamber 11a under the action of the centrifugal impeller 211, so that the air duct assembly 10 can 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 the slit-shaped air outlet 111, the air velocity at the air outlet 111 can be increased, the air supply distance can be increased, and the needs of users can be met.

[0081] 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 in the second housing 20 and opposite to the air inlet. During the operation of the air conditioner 100, air enters the air inlet passage 201 in 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.

[0082] Furthermore, as shown in Figure 1As shown, the second housing 20 includes a support housing 202 and a chassis 203. The support housing 202 is provided 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 provided at the air inlet. The first housing 1a is located above the support housing 202 and 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, it flows upward towards 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.

[0083] 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 components. 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.

[0084] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "schematic 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 expressions 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.

[0085] 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 an accommodation cavity therein, an air outlet communicating with the accommodation cavity is provided on the outer peripheral wall of the first housing, the air outlet is in a slit shape, an air duct inlet is provided on an axial end surface of the first housing, and the air duct assembly has axial air inlet and radial air outlet; A fan assembly including a motor and a centrifugal impeller, the centrifugal impeller is arranged in the accommodation cavity, an output shaft of the motor is connected to the centrifugal impeller, the centrifugal impeller has an impeller inlet opposite to the air duct inlet, and in the direction from the end of the accommodation cavity far from the air outlet to the end close to the air outlet, the distance between the surface of the centrifugal impeller far from the air duct inlet and the wall surface of the accommodation cavity far from the air duct inlet gradually increases.

2. The air duct assembly according to claim 1, characterized in that, The surface where the air outlet is located is parallel to the axis of the centrifugal impeller.

3. The air duct assembly according to claim 1, characterized in that, A protruding portion is provided on the outer peripheral wall of the first housing, the protruding portion defines an air outlet channel, one end of the air outlet channel communicates with the accommodation cavity, and the other end of the air outlet channel is configured as the air outlet.

4. The air duct assembly according to claim 3, characterized in that, In the direction towards the air outlet, the width of the air outlet channel gradually decreases.

5. The air duct assembly according to claim 1, characterized in that, The air outlet is an annular air outlet, and the axis of the annular air outlet is perpendicular to the axis of the first housing.

6. The air duct assembly according to claim 1, characterized in that, The air outlet is formed into a straight line shape or a curve shape.

7. The air duct assembly according to claim 1, characterized in that, There are multiple spaced-apart air outlets.

8. The air duct assembly according to claim 1, characterized in that, The diameter of the impeller inlet is D, the distance between the surface of the centrifugal impeller far from the air duct inlet and the wall surface of the accommodation cavity far from the air duct inlet is H, and H satisfies: H≥0.02D.

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

10. The air duct assembly according to claim 1, characterized in that, The diameter of the impeller inlet is D, the width of the air outlet is W, and it satisfies: 0<W≤0.1D.

11. The air duct assembly according to claim 10, characterized in that, The total length of the air outlet is L, and L satisfies: 0.5D≤L≤10D.

12. The air duct assembly according to claim 11, characterized in that, The width W, length L of the air outlet and the diameter D of the air inlet of the impeller satisfy: LW < πD 2 / 4.

13. The air duct assembly according to claim 1, characterized in that, A receiving groove is provided on the wall surface of the receiving cavity away from the air duct inlet, and the motor is arranged in the receiving groove.

14. The air duct assembly according to claim 1, characterized in that the motor is arranged 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.

15. The air duct assembly according to any one of claims 1-14, characterized in that a plurality of air guide plates are arranged in the air outlet, the plurality of air guide plates are spaced apart along the length direction of the air outlet, and both ends of each air guide plate in the width direction are respectively connected to both ends of the air outlet in the width direction.

16. The air duct assembly according to claim 15, characterized in that along the air flow direction, the thickness of the air guide plate gradually decreases.

17. An air conditioner, characterized in that comprising: a second housing, an air inlet passage is defined in the second housing, and the second housing has an air inlet communicating with the air inlet passage; a heat exchanger, the heat exchanger is arranged in the air inlet passage and opposite to the air inlet; The air duct assembly according to any one of claims 1-6, the first housing is connected to the second housing, and the air duct inlet is communicated with the air inlet passage.

18. The air conditioner according to claim 17, characterized in that the second housing includes: a chassis; a support shell, the support shell is arranged on the chassis, the support shell and the chassis jointly define the air inlet passage, the side wall of the support shell is formed with the air inlet communicating with the air inlet passage, the heat exchanger is arranged at the air inlet, and the first housing is located above the support shell and connected to the support shell.

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