Air conditioner indoor unit and air supply assembly thereof

Abstract

The invention provides an air conditioner indoor unit and an air supply assembly thereof. The air supply assembly comprises an air duct shell, a first air duct and a second air duct are formed in the air duct shell, the first air duct is provided with a first air inlet and a first air outlet, the second air duct is provided with a second air inlet and a second air outlet, and the second air outlet communicates with the first air duct; the first fan is arranged in the first air duct and is used for enabling air flow from the first air inlet to be blown out through the first air outlet; and the second fan is arranged in the second air duct and is used for enabling air flow from the second air inlet to at least partially enter the first air duct through the second air outlet. The air conditioner has the advantages that the air supply amount and the air supply distance can be increased at the same time, indoor rapid and uniform temperature adjustment is achieved, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an indoor unit of an air conditioner and an air supply component thereof. Background Art

[0002] As people's requirements for air conditioning comfort and performance increase, improving air volume and air supply experience has become a topic that needs to be continuously addressed in the air conditioning field. Most of the current air conditioning indoor units use cross-flow fans. The advantage of cross-flow fans is that the air supply consistency along the length of the fan is good, but the air volume is limited and the air supply distance is short. When cooling the indoor environment, the cooling time is long and the cooling effect is uneven. Summary of the invention

[0003] The object of the present invention is to solve at least one of the above-mentioned defects in the prior art and to provide an air conditioner indoor unit and an air supply assembly thereof.

[0004] A further object of the present invention is to reduce the space occupied by the air supply assembly.

[0005] In particular, according to a first aspect of the present invention, the present invention provides an air supply assembly, comprising:

[0006] An air duct housing, wherein a first air duct and a second air duct are formed inside the housing, wherein the first air duct has a first air inlet and a first air outlet, and the second air duct has a second air inlet and a second air outlet, and the second air outlet is connected to the first air duct;

[0007] a first fan, disposed in the first air duct, for blowing the air from the first air inlet outward through the first air outlet; and

[0008] The second fan is arranged in the second air duct, and is used for allowing the airflow from the second air inlet to at least partially enter the first air duct through the second air outlet.

[0009] Optionally, the first air duct runs through the air duct housing from back to front, the first air inlet is located at the rear side of the first air duct, and the first air outlet is located at the front side of the first air duct;

[0010] The second air duct extends from bottom to top to the first air duct, the second air inlet is located at the rear side of the second air duct, and the second air outlet is located at the top of the second air duct.

[0011] Optionally, a third air duct is further formed inside the air duct housing, the third air duct has a third air inlet and a third air outlet, and the third air outlet is connected to the first air duct;

[0012] The air supply assembly also includes a third fan, which is arranged in the third air duct and is used to make the airflow from the third air inlet at least partially blow to the first air duct through the third air outlet.

[0013] Optionally, the third air duct extends from bottom to top to the first air duct, the third air inlet is located at the rear side of the third air duct, and the third air outlet is located at the top of the third air duct.

[0014] Optionally, the second air duct extends upward from the front bottom of the air duct housing to the first air duct, and the third air duct extends upward from the rear middle of the air duct housing to the first air duct.

[0015] Optionally, the first fan is an axial flow fan, the second fan and the third fan are centrifugal fans, and the rotating shaft of each fan is arranged along the front-to-rear direction of the air duct housing.

[0016] Optionally, a drainage air duct is formed above the first air duct, and the peripheries of the first air duct and the drainage air duct are both non-enclosed structures, which are used to allow the airflow flowing out from the second air outlet and not entering the first air duct to be blown out through the drainage air duct.

[0017] Optionally, the air duct housing includes a first air guide cover, and the first air duct is formed in the first air guide cover;

[0018] The first air guide cover has a plurality of first air guide rings, which are arranged at intervals from front to back and form first ventilation intervals between the first air guide rings for allowing airflow to enter the first air duct.

[0019] Optionally, the inner diameter of the first guide ring gradually increases from front to back, so that the first guide ring is in a gradually expanding shape from front to back.

[0020] Optionally, the drainage air duct penetrates the air duct housing from back to front, a drainage air inlet is formed on the rear side of the drainage air duct, and the drainage air outlet is formed on the front side of the drainage air duct.

[0021] Optionally, the air duct housing includes a second air guide cover, and the air guide duct is formed in the second air guide cover;

[0022] The second air guide cover has a plurality of second air guide rings, which are arranged at intervals from front to back, and form second ventilation intervals between the rings to allow airflow to enter the air guide duct.

[0023] Optionally, the inner diameter of the second guide ring gradually increases from front to back, so that the second guide ring is in a gradually expanding shape from front to back.

[0024] According to a second aspect of the present invention, the present invention provides an air conditioner indoor unit, comprising any one of the air supply components described above.

[0025] The air supply component of the present invention has a first air duct provided with a first fan, a second air duct provided with a second fan, and a second air outlet of the second air duct is connected to the first air duct. During the air supply process, under the action of the second fan, the airflow in the second air duct enters the first air duct from the second air outlet, increasing the wind pressure at the first air outlet, and can increase the air supply distance of the first air outlet. Since the airflow entering the first air duct from the first air inlet and the second air outlet is blown outward from the first air outlet, the air supply volume of the first air outlet is also increased, which is conducive to realizing rapid adjustment of indoor temperature and improving the user experience.

[0026] Furthermore, in the air supply assembly of the present invention, the second air duct is arranged to extend upward from the bottom of the front side of the air duct shell, and the third air duct is arranged to extend upward from the middle of the rear side of the air duct shell. In this way, the second fan and the third fan can be centrifugal fans. Without increasing the internal space of the air duct shell, the second fan and the third fan are staggeredly installed in the second air duct and the third air duct, which helps to reduce the space occupied by the air supply assembly.

[0027] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0029] Figure 1 is a schematic structural diagram of an air supply assembly according to an embodiment of the present invention;

[0030] Figure 2 is a schematic cross-sectional view of an air supply assembly according to one embodiment of the present invention;

[0031] Figure 3 is a schematic exploded view of an air supply assembly according to one embodiment of the present invention;

[0032] Figure 4 yes Figure 2 A schematic structural diagram of the first air guide cover and the second air guide cover;

[0033] Figure 5 is a schematic structural diagram of an air conditioner indoor unit according to an embodiment of the present invention;

[0034] Figure 6 is a schematic exploded view of an air conditioner indoor unit according to an embodiment of the present invention.

[0035] Reference numerals:

[0036] 10. Air conditioner indoor unit; 100. Back shell; 200. Heat exchanger; 300. Air supply assembly; 301. First air duct; 31a. First air inlet; 31b. First air outlet; 302. Second air duct; 32a. Second air inlet; 32b. Second air outlet; 303. Third air duct; 33a. Third air inlet; 33b. Third air outlet; 304. Drainage air duct; 34a. Drainage air inlet; 34b. Drainage air outlet; 310. Air duct housing; 311. Air duct front cover; 312. Air duct back cover; 313. Air duct middle cover; 314. First air guide cover; 314a. First air guide ring; 315. Second air guide cover; 315a. Second air guide ring; 320. First fan; 330. Second fan; 340. Third fan. DETAILED DESCRIPTION

[0037] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the accompanying drawings. The various embodiments provided are intended to explain the present invention, not to limit the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made to the present invention without departing from the scope or spirit of the present invention. For example, a feature illustrated or described as a part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover such modifications and variations within the scope of the appended claims and their equivalents.

[0038] Refer to the following Figures 1 to 6 The air conditioner indoor unit 10 and the air supply assembly 300 thereof of the embodiment of the present invention are described. The directions or positional relationships indicated by "outside", "upper", "lower", "top", "bottom", "horizontal", and longitudinal directions are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In order to facilitate the illustration of the structure of the device, some of the drawings of the present invention are illustrated in perspective.

[0039] In the description of this embodiment, it should be understood that the term "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0040] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "some examples", "an example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0041] In one aspect, the present invention provides an air supply assembly 300 , which can be applied to an air conditioner indoor unit 10 , specifically a vertical air conditioner indoor unit 10 .

[0042] Figure 1 is a schematic structural diagram of an air supply assembly 300 according to an embodiment of the present invention. Figure 2 is a schematic cross-sectional view of an air supply assembly 300 according to an embodiment of the present invention, Figure 3 is a schematic exploded view of an air supply room according to an embodiment of the present invention.

[0043] like Figures 1 to 3 As shown, the air supply assembly 300 of the embodiment of the present invention may include an air duct housing 310 , a first fan 320 , and a second fan 330 .

[0044] The first air duct 301 and the second air duct 302 are formed inside the air duct housing 310. The first air duct 301 has a first air inlet 31a and a first air outlet 31b. The second air duct 302 has a second air inlet 32a and a second air outlet 32b. The second air outlet 32b is connected to the first air duct 301. The first fan 320 is arranged in the first air duct 301, and is used to make the airflow from the first air inlet 31a blow outward through the first air outlet 31b. The second fan 330 is arranged in the second air duct 302, and is used to make the airflow from the second air inlet 32a at least partially enter the first air duct 301 through the second air outlet 32b.

[0045] During the air supply process, under the action of the second fan 330, the airflow in the second air duct 302 enters the first air duct 301 from the second air outlet 32b, increasing the wind pressure at the first air outlet 31b, and increasing the air supply distance of the first air outlet 31b. Since the airflow entering the first air duct 301 from the first air inlet 31a and the second air outlet 32b is blown outward from the first air outlet 31b, the air supply volume of the first air outlet 31b is also increased, which is conducive to achieving rapid adjustment of the indoor temperature and improving the user experience.

[0046] In one example, the first air duct 301 may penetrate the air duct housing 310 from back to front, the first air inlet 31a is located at the rear side of the first air duct 301, and the first air outlet 31b is located at the front side of the first air duct 301. The second air duct 302 may extend from bottom to top to the first air duct 301, the second air inlet 32a is located at the rear side of the second air duct 302, and the second air outlet 32b is located at the top of the second air duct 302. Thus, the second fan 330 can blow the air in the second air duct 302 at least partially to the first air duct 301 through the second air outlet 32b by sending air upward.

[0047] In an optional embodiment, a third air duct 303 is further formed inside the air duct housing 310, and the third air duct 303 has a third air inlet 33a and a third air outlet 33b, and the third air outlet 33b is connected to the first air duct 301. The air supply assembly 300 also includes a third fan 340, which is arranged in the third air duct 303 and is used to make the airflow from the third air inlet 33a at least partially blow to the first air duct 301 through the third air outlet 33b.

[0048] By adopting the above solution, the second fan 330 and the third fan 340 can be used to blow air to the first air duct 301 at the same time, which greatly increases the wind pressure at the first air outlet 31b, so that the air supply volume and air supply distance of the first air outlet 31b are significantly improved.

[0049] In one example, the third air duct 303 extends from bottom to top to the first air duct 301, the third air inlet 33a is located at the rear side of the third air duct 303, and the third air outlet 33b is located at the top of the third air duct 303. Thus, the third fan 340 can also blow the air in the third air duct 303 at least partially to the first air duct 301 through the third air outlet 33b by sending air upward.

[0050] Preferably, the second air duct 302 extends upward from the bottom of the front side of the air duct housing 310 to the first air duct 301, and the third air duct 303 extends upward from the middle of the rear side of the air duct housing 310 to the first air duct 301. In other words, the second air duct 302 and the third air duct 303 are arranged side by side along the front-to-back direction of the air duct housing 310, and the second fan 330 and the third fan 340 can independently supply airflow to the first air duct 301 in their respective air ducts.

[0051] In the embodiment shown in the drawings of the present invention, the first fan 320 is an axial flow fan, the second fan 330 and the third fan 340 are centrifugal fans, and the rotating shafts of the fans are arranged along the front-to-back direction of the air duct housing 310. In this way, the second fan 330 and the third fan 340 can be installed in the second air duct 302 and the third air duct 303 in a staggered manner without increasing the internal space of the air duct housing 310, which is conducive to reducing the space occupied by the air supply assembly 300.

[0052] It should be noted that if the second fan 330 and the third fan 340 are axial flow fans, the rotating shafts of the second fan 330 and the third fan 340 must be arranged along the height direction of the air duct housing 310, which will cause a sudden increase in the thickness of the air duct housing 310 in the front-to-back direction.

[0053] It can be understood that since the flow direction of the airflow in the second air duct 302 is perpendicular to the flow direction of the airflow in the first air duct 301, if the airflow in the second air duct 302 directly enters the first air duct 301 through the second air outlet 32b, it will cause certain obstructions to the flow of the airflow in the first air duct 301.

[0054] To this end, in an embodiment of the present invention, a drainage duct 304 is formed above the first air duct 301, and the peripheries of the first air duct 301 and the drainage duct 304 are both non-closed structures, which are used to allow the airflow flowing out from the second air outlet 32b and not entering the first air duct 301 to be blown out through the drainage duct 304.

[0055] In this way, part of the airflow flowing out from the second air outlet 32b can directly enter the first air duct 301 to increase the wind pressure at the first air outlet 31b, and the remaining airflow can bypass the first air duct 301, enter the drainage air duct 304 from the periphery of the first air duct 301, and be blown out from the drainage air duct 304. In this way, the wind outlet resistance can be reduced and the flow smoothness of the airflow can be improved.

[0056] In one example, referring to Figure 3 and Figure 4 The air duct housing 310 may include a first air guide cover 314, and the first air duct 301 is formed in the first air guide cover 314. The first air guide cover 314 has a plurality of first air guide rings 314a, and the plurality of first air guide rings 314a are arranged from front to back at intervals, and a first ventilation interval is formed between each other to allow airflow to enter the first air duct 301. In this way, part of the airflow flowing out of the second air outlet 32b can enter the first air duct 301 through the first ventilation interval.

[0057] Furthermore, the inner diameter of the first guide ring 314a gradually increases from front to back, so that the first guide ring 314a is gradually expanded from front to back. Thus, the first guide ring 314a can play a guiding role, so that the airflow at the second air outlet 32b enters the first air duct 301 obliquely upward from back to front, which is conducive to reducing the air inlet resistance.

[0058] In one example, the air duct 304 penetrates the air duct housing 310 from back to front, a air inlet 34 a is formed at the rear side of the air duct 304 , and the air outlet 34 b described above is formed at the front side of the air duct 304 .

[0059] During the air supply process, the airflow flowing out of the second air outlet 32b and not entering the first air duct 301 can enter the drainage air duct 304 upwards, and then blow out from the drainage air outlet 34b. During this period, the airflow on the rear side of the air supply component 300 can also enter the drainage air duct 304 through the drainage air inlet 34a, and then blow out from the drainage air outlet 34b. This is conducive to balancing the wind pressure and improving the air supply stability of the air supply component 300.

[0060] In one example, the air duct housing 310 may further include a second air guide cover 315, and the air duct 304 is formed in the second air guide cover 315. The second air guide cover 315 has a plurality of second air guide rings 315a, which are arranged from front to back at intervals, and a second ventilation interval is formed between each other to allow airflow to enter the air duct 304. In this way, part of the airflow flowing out of the second air outlet can bypass the first air duct 301 and enter the air duct 304 from the second ventilation interval.

[0061] Furthermore, the inner diameter of the second guide ring 315a gradually increases from front to back, so that the second guide ring 315a is gradually expanded from front to back. Thus, the second guide ring 315a can play a guiding role, so that the airflow below can enter the guide air duct 304 obliquely upward from back to front, and then blow out forward from the guide air outlet 34b.

[0062] It should be noted that when the third air duct 303 and the third fan 340 are provided, part of the airflow blown out from the third air outlet 33b can also enter the first air duct 301 through the first ventilation gap between the first guide rings 314a, and the remaining airflow bypasses the first air duct 301 and enters the guide air duct 304 through the second ventilation gap between the second guide rings 315a.

[0063] In the embodiment shown in the drawings of the present invention, the first fan 320, the third fan 340 and the second fan 330 are arranged in a stepped manner from top to bottom and from back to front. The first fan 320 can partially extend backward from the first air inlet 31a to the first air duct 301, and the last first guide ring 314a of the first guide cover 314 abuts against the front side of the first fan 320.

[0064] Considering that the third fan 340 blows air vertically upwards and the first fan 320 blows air horizontally forwards, and the third fan 340 is close to the first fan 320 , the third fan 340 will seriously hinder the smooth air output of the first fan 320 .

[0065] In one example, the width (front-to-back direction) of the last first guide ring 314a in the first guide cover 314 can be designed to be larger, and its inner diameter can remain unchanged from front to back. Figure 2As shown, the first guide ring 314a is located directly above the third air outlet 33b, and its width can be 3 / 4 of the width of the third air outlet 33b. In this way, under the blocking effect of the last first guide ring 314a, most of the airflow flowing out of the third air outlet 33b can bypass the first air duct 301 from both sides and enter the guide air duct 304, and then blow forward from the guide air outlet 34b, and a small part of the airflow can enter the first air duct 301 from the first ventilation interval, and then blow forward from the first air outlet 31b.

[0066] In one example, the bottom of each second guide ring 315a of the second guide cover 315 can be arched upward so that each second guide ring 315a is in an arch shape with a closed bottom. In this way, the height of the air duct 304 can be lowered, thereby lowering the height of the air supply assembly 300, which is beneficial to reducing the space occupied by the air supply assembly 300.

[0067] Furthermore, the radius of the second guide ring 315a is greater than the radius of the first guide ring 314a, the distance between adjacent second guide rings 315a is the same as the distance between adjacent first guide rings 314a, and the bottom of each second guide ring 315a is respectively fixed to the top of each first guide ring 314a, so that the overall stability of the first guide cover 314 and the second guide cover 315 can be improved.

[0068] In an optional embodiment, the air duct housing 310 includes an air duct front cover 311 , an air duct rear cover 312 , an air duct middle cover 313 , a first air guide cover 314 and a second air guide cover 315 .

[0069] Among them, the duct front cover 311 and the duct rear cover 312 are interlocked to form a accommodating cavity, and the duct middle cover 313 is U-shaped with its opening facing the duct front cover 311, forming a third air duct 303 between it and the duct rear cover 312, and forming a partial section of the second air duct 302 between it and the duct front cover 311.

[0070] The first air guide cover 314 and the second air guide cover 315 are both arranged in the accommodating cavity. The second air guide cover 315 is located at the top of the accommodating cavity to form the above-mentioned air guide duct 304. The first air guide cover 314 is located below the second air guide cover 315 to form the above-mentioned first air duct 301.

[0071] It should be noted that, in the present invention, the first fan 320, the second fan 330 and the third fan 340 can supply air individually or collectively.

[0072] like Figure 3 As shown by the middle arrow 1, when only the first fan 320 is supplying air, the main flow direction of the airflow is: first air inlet 31a→first air duct 301→first air outlet 31b.

[0073] like Figure 3 As shown by the middle arrow 2, when only the second fan 330 is supplying air, the main flow direction of the airflow is the second air inlet 32a→the second air duct 302→the second air outlet 32b→the first air duct 301→the first air outlet 31b, and the second air inlet 32a→the second air duct 302→the second air outlet 32b→the drainage air duct 304→the drainage air outlet 34b.

[0074] like Figure 3 As shown by the middle arrow 3, when only the third fan 340 is supplying air, the main flow direction of the airflow is third air inlet 33a→third air duct 303→third air outlet 33b→first air duct 301→first air outlet 31b, and third air inlet 33a→third air duct 303→third air outlet 33b→drainage air duct 304→drainage air outlet 34b.

[0075] Another aspect of the present invention provides an air conditioner indoor unit 10, Figure 5 is a schematic structural diagram of an air-conditioning indoor unit 10 according to an embodiment of the present invention. Figure 6 1 is a schematic exploded view of an air conditioner indoor unit 10 according to an embodiment of the present invention. The air conditioner indoor unit 10 may include a front shell, a rear shell 100, an air supply assembly 300 and a heat exchanger 200, wherein: Figure 5 and Figure 6 The front shell of the air conditioner indoor unit 10 is omitted.

[0076] like Figure 5 and Figure 6 As shown, the air supply assembly 300, the heat exchanger 200 and the rear shell 100 are arranged in sequence from back to front. An air inlet grille is provided on the rear shell 100, and the air inlet grille extends along the height direction of the rear shell 100. The top of the air inlet grille is lower than the drainage air duct 304. When each fan is running, the indoor air can exchange heat with the heat exchanger 200 through the air inlet grille, and then enter the air duct from the corresponding air inlet.

[0077] According to any one of the above optional embodiments or a combination of multiple optional embodiments, the embodiments of the present invention can achieve the following beneficial effects:

[0078] The air supply component 300 of the embodiment of the present invention has a first air duct 301 provided with a first fan 320, a second air duct 302 provided with a second fan 330, and a second air outlet 32b of the second air duct 302 is connected with the first air duct 301. During the air supply process, under the action of the second fan 330, the airflow in the second air duct 302 enters the first air duct 301 from the second air outlet 32b, which increases the wind pressure at the first air outlet 31b and can increase the air supply distance of the first air outlet 31b. Since the airflow entering the first air duct 301 from the first air inlet 31a and the second air outlet 32b is blown outward from the first air outlet 31b, the air supply volume of the first air outlet 31b is also increased, which is conducive to realizing rapid adjustment of indoor temperature and improving the user experience.

[0079] Furthermore, in the air supply assembly 300 of the embodiment of the present invention, the second air duct 302 is configured to extend upward from the front bottom of the air duct shell 310, and the third air duct 303 is configured to extend upward from the rear middle of the air duct shell 310. In this way, the second fan 330 and the third fan 340 can be centrifugal fans. Without increasing the internal space of the air duct shell 310, the second fan 330 and the third fan 340 are staggeredly installed in the second air duct 302 and the third air duct 303, which helps to reduce the space occupied by the air supply assembly 300.

[0080] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. An air supply assembly, comprising: An air duct housing, wherein a first air duct and a second air duct are formed inside the housing, wherein the first air duct has a first air inlet and a first air outlet, and the second air duct has a second air inlet and a second air outlet, and the second air outlet is connected to the first air duct; a first fan, disposed in the first air duct, for blowing the air from the first air inlet outward through the first air outlet; as well as The second fan is arranged in the second air duct, and is used for allowing the airflow from the second air inlet to at least partially enter the first air duct through the second air outlet.

2. The air supply assembly according to claim 1, wherein The first air duct runs through the air duct housing from back to front, the first air inlet is located at the rear side of the first air duct, and the first air outlet is located at the front side of the first air duct; The second air duct extends from bottom to top to the first air duct, the second air inlet is located at the rear side of the second air duct, and the second air outlet is located at the top of the second air duct.

3. The air supply assembly according to claim 2, wherein A third air duct is also formed inside the air duct housing, the third air duct has a third air inlet and a third air outlet, and the third air outlet is connected to the first air duct; The air supply assembly also includes a third fan, which is arranged in the third air duct and is used to make the airflow from the third air inlet at least partially blow to the first air duct through the third air outlet.

4. The air supply assembly according to claim 3, wherein The third air duct extends from bottom to top to the first air duct, the third air inlet is located at the rear side of the third air duct, and the third air outlet is located at the top of the third air duct.

5. The air supply assembly according to claim 4, wherein The second air duct extends upward from the front bottom of the air duct housing to the first air duct, and the third air duct extends upward from the rear middle of the air duct housing to the first air duct.

6. The air supply assembly according to claim 3, wherein The first fan is an axial flow fan, the second fan and the third fan are centrifugal fans, and the rotating shafts of the fans are arranged along the front-to-back direction of the air duct housing.

7. The air supply assembly according to claim 1, wherein A drainage duct is formed above the first duct, and the peripheries of the first duct and the drainage duct are both non-enclosed structures, which are used to allow the airflow that flows out from the second air outlet and does not enter the first duct to be blown out through the drainage duct.

8. The air supply assembly according to claim 7, wherein The air duct housing includes a first air guide cover, and the first air duct is formed in the first air guide cover; The first air guide cover has a plurality of first air guide rings, which are arranged at intervals from front to back and form first ventilation intervals between the first air guide rings for allowing airflow to enter the first air duct.

9. The air supply assembly according to claim 8, wherein The inner diameter of the first guide ring gradually increases from front to back, so that the first guide ring is in a gradually expanding shape from front to back.

10. The air supply assembly according to claim 7, wherein The drainage air duct penetrates the air duct housing from back to front, a drainage air inlet is formed at the rear side of the drainage air duct, and the drainage air outlet is formed at the front side of the drainage air duct.

11. The air supply assembly according to claim 7, wherein The air duct housing includes a second air guide cover, and the air guide duct is formed in the second air guide cover; The second air guide cover has a plurality of second air guide rings, which are arranged at intervals from front to back, and form second ventilation intervals between the rings to allow airflow to enter the air guide duct.

12. The air supply assembly according to claim 11, wherein The inner diameter of the second guide ring gradually increases from front to back, so that the second guide ring is in a gradually expanding shape from front to back.

13. An air conditioner indoor unit, comprising an air supply assembly according to any one of claims 1 to 12.

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