Air conditioner indoor unit and air conditioner

Abstract

The present invention discloses an air conditioner indoor unit and an air conditioner. The air conditioner indoor unit includes a volute, a volute tongue and an impeller. A wind channel is formed between the volute and the volute tongue. The impeller is arranged in the wind channel. The volute tongue includes a tongue root and a diffuser section connected to the tongue root. A plurality of tooth protrusions are provided on the wind guiding surface of the tongue root located in the wind channel. The plurality of tooth protrusions are arranged at intervals along the axial direction of the impeller. The tooth protrusions extend from the free end of the tongue root towards the diffuser section. An air passing groove is formed between two adjacent tooth protrusions. The air passing groove includes a front section and a rear section. The rear section is adjacent to one end of the front section away from the diffuser section. A first included angle between two side wall surfaces of the front section is 0 to 90°. The front section is arranged in a flared shape along the air outlet direction, and at least some of the plurality of first included angles are different. A second included angle between two side wall surfaces of the rear section is 0 to 90°. The rear section is arranged in a constricted shape along the air outlet direction, and at least some of the plurality of second included angles are different. The technical solution of the present invention has the characteristics of eliminating abnormal sounds and improving sound quality.

Description

Technical Field

[0001] The present invention relates to the field of air treatment, and particularly to an air conditioner indoor unit and an air conditioner. Background Art

[0002] With the improvement of people's living standards, people's requirements for household appliances are also getting higher and higher. For example, the requirements for noise control of air conditioners are getting higher and higher. Many existing air conditioner indoor units have problems such as poor sound quality and whistling, which seriously affect the user experience. Summary of the Invention

[0003] The main object of the present invention is to provide an air conditioner indoor unit, aiming to eliminate noise and improve the air outlet sound quality of the air conditioner indoor unit.

[0004] To achieve the above object, the air conditioner indoor unit proposed by the present invention includes a volute, a volute tongue and a wind wheel. A wind duct is formed between the volute and the volute tongue. The wind wheel is arranged in the wind duct. The volute tongue includes a tongue root and a diffuser section connecting the tongue root. A plurality of tooth protrusions are provided on the air guiding surface of the tongue root located in the wind duct. The plurality of tooth protrusions are arranged at intervals along the axial direction of the wind wheel. The tooth protrusions extend from the free end of the tongue root towards the diffuser section direction;

[0005] An air passage groove is formed between two adjacent tooth protrusions. The air passage groove includes a front section and a rear section. The rear section is adjacent to one end of the front section away from the diffuser section;

[0006] The front section is flared in the air outlet direction, and / or the rear section is constricted in the air outlet direction.

[0007] Optionally, at least some of the angles of the plurality of first angles are different, and at least some of the angles of the plurality of second angles are different.

[0008] Optionally, the first angle between the two side wall surfaces of the front section is 0 to 90°, and the second angle between the two side wall surfaces of the rear section is 0 to 90°.

[0009] Optionally, at the rated power of the air conditioner indoor unit, the linear velocity of the outer edge of the wind wheel is greater than 1.5 times the air flow velocity at the tongue root, and the first angle is greater than the second angle.

[0010] Optionally, the first angle is 2° to 20° larger than the second angle.

[0011] Optionally, at the rated power of the air conditioner indoor unit, the linear velocity of the outer edge of the wind wheel is less than 1.3 times the air flow velocity at the tongue root, and the first angle is less than the second angle.

[0012] Optionally, the first angle is 2° to 20° smaller than the second angle.

[0013] Optionally, at the rated power of the indoor air conditioner, the linear velocity of the outer edge of the impeller is 1.3 to 1.5 times the air flow velocity at the root of the tongue, and the absolute value of the angle difference between the first angle and the second angle is less than or equal to 2°.

[0014] Optionally, the tooth protrusion includes a bent portion and a rear portion. The rear portion is connected to one end of the bent portion away from the diffuser section. The tooth top of the tooth protrusion is located at the connection between the bent portion and the rear portion. The windward surface of the bent portion is an arc surface. The front section is formed between two adjacent bent portions, and the rear section is formed between the two rear portions.

[0015] Optionally, the radian of the windward surface of some of the bent portions is greater than the radian of the windward surface of the other part of the bent portions.

[0016] Optionally, the windward surface of the rear portion is an inclined surface.

[0017] Optionally, the length of the bent portion is less than the length of the rear portion.

[0018] The present invention also provides an air conditioner, including an outdoor air conditioner and the above-mentioned indoor air conditioner. The outdoor air conditioner is connected to the indoor air conditioner through a refrigerant pipe.

[0019] In the technical solution of the present invention, by providing a plurality of tooth protrusions on the root of the tongue to form air passing grooves between the tooth protrusions, the air flow rate on the root of the tongue is affected by the tooth protrusions, so that the air flow rate at the tooth protrusions is less than the air flow rate at the air passing grooves, thereby making the air flow rate on the root of the tongue different, which is beneficial to destroying resonance and improving the air outlet sound quality. In addition, the rear sections of the plurality of air passing grooves are respectively provided with a reduced opening along the air outlet direction. When the air enters the rear sections of the air passing grooves, the air on both sides of the air passing grooves has a tendency to flow into the air passing grooves, which makes the influence range of the air passing grooves on the air flow larger, and also makes the air intake between two adjacent air passing grooves interfere with each other, which is beneficial to destroying resonance to eliminate whistling. The front sections of the plurality of air passing grooves are provided with an enlarged opening, so that the air outlet air flows between two adjacent air passing grooves interfere with each other, which is beneficial to destroying resonance to eliminate whistling. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0021] Figure 1 It is an exploded view of an embodiment of the indoor air conditioner of the present invention;

[0022] Figure 2 is Figure 1 A sectional view of an air conditioner indoor unit;

[0023] Figure 3 is Figure 1 A schematic diagram of the first perspective of the chassis of the air conditioner indoor unit;

[0024] Figure 4 is Figure 3 An enlarged partial view at position A;

[0025] Figure 5 A schematic diagram of the partial structure of the tongue root of another embodiment of the air conditioner indoor unit of the present invention;

[0026] Figure 6 A schematic diagram of the partial structure of the tongue root of yet another embodiment of the air conditioner indoor unit of the present invention;

[0027] Figure 7 is Figure 3 A schematic diagram of the second perspective of the chassis;

[0028] Figure 8 is Figure 7 An enlarged partial view at position B.

[0029] Explanation of the reference numerals in the drawings:

[0030] Label Name Label Name 100 Volute 200 Volute tongue 210 Root of tongue 211 Free end 212 Air guiding surface 220 Diffuser section 230 Convex tooth 231 Bending part 232 Rear part 240 Air passage slot 241 Front section 242 Rear section 300 Wind wheel 400 Chassis 500 Front frame

[0031] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0033] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if the embodiments of the present invention involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or is impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] The present invention provides an air conditioner indoor unit.

[0036] In an embodiment of the present invention, as Figures 1 to 4 shown, the air conditioner indoor unit includes a volute 100, a volute tongue 200 and a wind wheel 300. A wind duct is formed between the volute 100 and the volute tongue 200. The wind wheel 300 is arranged in the wind duct. The volute tongue 200 includes a tongue root 210 and a diffuser section 220 connecting the tongue root 210. A plurality of tooth protrusions 230 are provided on the air guiding surface 212 of the tongue root 210 located in the wind duct. The plurality of tooth protrusions 230 are arranged at intervals along the axial direction of the wind wheel 300. The tooth protrusions 230 extend from the free end 211 of the tongue root 210 towards the diffuser section 220. An air passing groove 240 is formed between two adjacent tooth protrusions 230. The air passing groove 240 includes a front section 241 and a rear section 242. The rear section 242 is adjacent to one end of the front section 241 away from the diffuser section 220. The front section 241 is flared along the air outlet direction. The rear section 242 is constricted along the air outlet direction. When the air conditioner indoor unit in this embodiment blows air, the air flow in the wind duct flows from the free end 211 of the tongue root 210 towards the diffuser section 220. The groove width at the connection of the front section 241 and the rear section 242 of the air passing groove 240 is smaller than the groove widths at both ends of the air passing groove 240. The air flow first passes through the rear section 242 and then passes through the front section 241 to flow out of the air passing groove 240. The distance between the tooth protrusions 230 and the wind wheel 300 is smaller than the distance between the bottom of the air passing groove 240 and the wind wheel 300, so that when the air conditioner indoor unit blows air, the air flow rate at the air passing groove 240 in the wind duct is greater than the air flow rate at the tooth protrusions 230. The housing of the air conditioner indoor unit includes a front frame 500 and a chassis 400. The chassis 400 is connected to the front frame 500. The chassis 400 includes the volute tongue 200 and a part of the volute 100.

[0037] It should be noted that the tongue root 210 is the part of the volute tongue 200 close to the impeller 300. The diffuser section 220 is connected to one end of the tongue root 210. The diffuser section 220 extends from the back to the front. The tongue root 210 and the diffuser section 220 are arranged at an angle. The free end 211 of the tongue root 210 refers to the end of the tongue root 210 far from the diffuser section 220. The surface of the tongue root 210 close to the impeller 300 is the air guiding surface 212.

[0038] In the technical solution of the present invention, a plurality of tooth protrusions 230 are arranged on the tongue root 210 to form air passing grooves 240 between the tooth protrusions 230. The air flow rate on the tongue root 210 is affected by the tooth protrusions 230, so that the air flow rate at the tooth protrusions 230 is less than the air flow rate at the air passing grooves 240, thereby making the air flow rate on the tongue root 210 different, which is beneficial to destroying resonance and improving the air outlet sound quality. In addition, the rear sections 242 of the plurality of air passing grooves 240 are respectively arranged in a constricted manner along the air outlet direction. When the rear sections 242 of the air passing grooves 240 intake air, the air on both sides of the air passing grooves 240 has a tendency to flow into the air passing grooves 240, which makes the influence range of the air passing grooves 240 on the air flow larger, and also makes the intake air between two adjacent air passing grooves 240 interfere with each other, which is beneficial to destroying resonance to eliminate whistling. The front sections 241 of the plurality of air passing grooves 240 are arranged in a flared manner, so that the air outlet air flows between two adjacent air passing grooves 240 interfere with each other, which is beneficial to destroying resonance to eliminate whistling and other noises, and can effectively improve the sound quality.

[0039] Further, in this embodiment, at least some of the angles of the plurality of first angles α are different, and at least some of the angles of the plurality of second angles β are different. The different angles of the first angle α and the different angles of the second angle β make the air outlet volume and the air intake volume of the air passing grooves 240 different, which can further destroy resonance to eliminate whistling and can effectively improve the air outlet sound quality.

[0040] The tongue root 210 described in this embodiment is not limited to the above technical solution. In other embodiments, it may also be that the first angles of the air passing grooves on the tongue root are all the same, and the second angles of the air passing grooves on the tongue root are all the same. There is still air flow interference between two adjacent air passing grooves, which can effectively destroy resonance and reduce noise.

[0041] Further, in this embodiment, the first included angle α between the two side wall surfaces of the front section 241 is less than or equal to 90°, and the second included angle β between the two side wall surfaces of the rear section 242 is less than or equal to 90°. When the angle of the first included angle α is too large, it is likely to cause the airflow to change too much from the rear section 242 to the front section 241, making the airflow too chaotic and not conducive to the stable air outlet of the air duct. When the second included angle β is too large, it will also cause the airflow to change too much from the rear section 242 to the front section 241, making the airflow too chaotic and not conducive to the stable air outlet of the air duct.

[0042] It should be noted that the air passing slot 240 described in this embodiment is not limited to the above technical solution. In other embodiments, it may also be that the first included angle α between the two side wall surfaces of the front section is 0 to 90°, the front section is flared along the air outlet direction, the second included angles β between the two side wall surfaces of multiple rear sections may be equal or different, and the two side wall surfaces of the rear section may be parallel to each other or arranged at an included angle. At least some of the multiple first included angles α are different, so that the air outlet angles of the air passing slot are different, increasing the degree of differentiation of the airflow distribution in the air duct, which is conducive to eliminating whistling and improving the air outlet sound quality.

[0043] The air passing slot 240 described in this embodiment is not limited to the above technical solution. In other embodiments, it may also be that the second included angle β between the two side wall surfaces of the rear section is 0 to 90°, the rear section is constricted along the air outlet direction, at least some of the multiple second included angles β are different, the two side wall surfaces of the front section may be parallel to each other or arranged at an included angle, the multiple first included angles α may be equal or different, and the setting of the second included angle β can make the air intake of the air passing slot different, which is conducive to eliminating whistling and improving the air outlet sound quality.

[0044] The first included angles α on the tongue root 210 described in this embodiment may be partially equal and partially different, or two adjacent first included angles α may be different, or all the angles of the first included angles α may be different; the second included angles β of the tongue root 210 grid may be partially equal and partially different, or two adjacent second included angles β may be different, or the angles of the second included angles β may be evenly distributed.

[0045] Further, in this embodiment, as Figure 4As shown, at the rated power of the air conditioner indoor unit, the linear velocity of the outer edge of the impeller 300 is greater than 1.5 times the air velocity at the root 210 of the volute tongue 200, and the first included angle α is greater than the second included angle β. When the air velocity at the root 210 of the volute tongue 200 in the air duct is too large or too small, it is easy to cause noise and reduce the sound quality of the air output from the air conditioner indoor unit. When the linear velocity of the outer edge of the impeller 300 at the rated power of the air conditioner indoor unit is greater than 1.5 times the air velocity at the root 210 of the volute tongue 200, it indicates that the air velocity at the root 210 is too large and noise is likely to be generated. Therefore, the first included angle α is set to be greater than the second included angle β, and the air passing duct can play a role in buffering the air flow to reduce the air velocity at the root 210 of the volute tongue 200, making the air velocity at the root 210 tend to be normal and improving the sound quality.

[0046] Further, in this embodiment, as Figure 4 shown, the first included angle α is 2° to 20° larger than the second included angle β. When the angle of the first included angle α is excessively larger than the angle of the second included angle β, the air velocity after being buffered by the air passing duct will be too low, which is likely to generate abnormal noise. When the angles of the first included angle α and the second included angle β are too close, the buffering effect of the air passing duct is small, the change in the air velocity after the air flow passes through the air passing duct is not significant, and the effect of removing impurities is poor.

[0047] Of course, the present invention is not limited to the above technical solutions. In other embodiments, it may also be, as Figure 5 shown, at the rated power of the air conditioner indoor unit, the linear velocity of the outer edge of the impeller 300 is less than 1.3 times the air velocity at the root 210 of the volute tongue 200, and the first included angle α is greater than the second included angle β. When the linear velocity of the outer edge of the impeller 300 at the rated power of the air conditioner indoor unit is less than 1.3 times the air velocity at the root 210 of the volute tongue 200, it indicates that the air velocity at the root 210 of the volute tongue 200 is too small, which is not only likely to generate abnormal noise but also affect the air velocity and air supply distance of the air output from the air conditioner indoor unit. Therefore, the first included angle α is set to be greater than the second included angle β, which can accelerate the air flow, making the air velocity increase after the air flow passes through the air passing slot 240 and tend to the normal air velocity. This is not only beneficial to improving the sound quality of the air output but also can improve the air supply distance. Further, the first included angle α is 2° to 20° smaller than the second included angle β. When the first included angle α is excessively smaller than the second included angle β, it is easy for the air velocity to be too fast after being accelerated by the air passing duct, which is likely to generate noise and increase the noise level. When the difference between the first included angle α and the second included angle β is relatively close, the effect of accelerating the air flow by the air passing duct is poor, and it is difficult to improve the sound quality.

[0048] The present invention is not limited to the above technical solutions. In other embodiments, it may also be, for example Figure 6 As shown, at the rated power of the air conditioner indoor unit, the linear velocity of the outer edge of the impeller 300 is 1.3 to 1.5 times the air flow velocity at the root 210 of the tongue, and the absolute value of the angle difference between the first angle α and the second angle β is less than or equal to 2°. When the linear velocity of the outer edge of the impeller 300 at the rated power is 1.3 to 1.5 times the air flow velocity at the root 210 of the tongue, it indicates that the air flow velocity at the root 210 of the tongue is normal. Therefore, controlling the absolute value of the angle difference between the first angle α and the second angle β to be less than or equal to 2° may be that the first angle α is 0 to 2° larger than the second angle β, or the second angle β is 0 to 2° larger than the first angle α, so that the wind speed flowing through the air passage 240 changes little and remains within the normal wind speed range, ensuring the sound quality of the air output from the air conditioner indoor unit.

[0049] Furthermore, in this embodiment, for example Figure 7 , Figure 8 As shown, the tooth protrusion 230 includes a bent portion 231 and a rear portion 232. The rear portion 232 is connected to one end of the bent portion 231 away from the diffuser section 220. The tooth top of the tooth protrusion 230 is located at the connection of the bent portion 231 and the rear portion 232. The windward surface of the bent portion 231 is an arc surface. The front section 241 is formed between two adjacent bent portions 231, and the rear section 242 is formed between the two rear portions 232. It should be noted that the front section 241 of the air passage 240 is arranged between two adjacent bent portions 231, and the rear section 242 of the air passage 240 is arranged between two adjacent rear portions 232. The windward surface of the bent portion 231 is adjacent to the surface of the diffuser section 220 located in the air duct. Since the root 210 of the volute tongue 200 and the diffuser section 220 are arranged at an angle, the windward surface of the bent portion 231 is arranged in an arc shape, which is not only beneficial to smoothly transitioning the air flow from the root 210 to the diffuser section 220, but also can reduce the noise generated when the air flow flows from the root 210 to the diffuser section 220, which is beneficial to noise reduction and sound quality improvement.

[0050] Of course, the tooth protrusion 230 is not limited to the above technical solutions. In other embodiments, it may also be that the front section of the air passage is located at the connection of the front section and the rear section of the air passage and is between two adjacent bent portions; it may also be that the front section of the air passage is located at the connection of the front section and the rear section of the air passage and is between two adjacent rear sections. The air passage and the tooth protrusion also have the characteristic of improving the sound quality of the air output; the tooth protrusion is not limited to the above shape either. In other embodiments, the tooth protrusion may also be in the shape of a triangular prism.

[0051] Further, in this embodiment, as Figure 7 , Figure 8 shown, the radian of the windward surface of a part of the bent portion 231 is greater than that of another part of the windward surface of the bent portion 231. The change in the radian of the windward surface causes the change in the wind guiding effect of the windward surface, and at the same time, it will also cause the change in the height of the air duct at the windward surface of the bent portion 231, thereby resulting in the change in the air flow rate at the windward surface of the bent portion 231, having the effect of destroying resonance, eliminating whistling, and improving the air outlet sound quality of the air conditioner indoor unit.

[0052] Specifically, for the bent portion 231 on the tongue root 210 described in this embodiment, the radian of all the bent portions 231 can be different, having the characteristics of large difference and many changes in the air volume on the tongue root 210, and having a good effect of eliminating whistling; it can also be that the radian of a part of the bent portions 231 is the same, and the radian of another part of the bent portions 231 is different; it can also be that the radian of two adjacent bent portions 231 is different from each other, having the effect of eliminating whistling and improving sound quality.

[0053] Further, in this embodiment, as Figure 7 , Figure 8 shown, the windward surface of the rear portion 232 is an inclined surface. One end of the windward surface of the rear portion 232 is adjacent to the wind guiding surface 212 of the tongue root 210, and the other end is adjacent to the windward surface of the bent portion 231. The air flow on the tooth convex 230 flows from the windward surface of the rear portion 232 to the windward surface of the bent portion 231, and then flows to the surface of the diffuser section 220 located in the air duct. The windward surface of the rear portion 232 being an inclined surface is beneficial to making the air flow change smoothly on the rear portion 232 and is beneficial to guiding the air flow to flow smoothly to the diffuser section 220.

[0054] Further, in this embodiment, as Figure 8 shown, the length of the bent portion 231 is less than the length of the rear portion 232. Since the wind speed at the tongue root 210 of the volute tongue 200 is high, if the air flow rate or the wind direction changes too much, the stability of the air flow in the air duct will be damaged. The rear portion 232 having a longer length enables the rear portion 232 of the tooth convex 230 to have a longer distance for the air flow to change, which is beneficial to ensuring the stability of the air flow on the tooth convex 230. Since the function of the bent portion 231 is to turn the air flow, the shorter length of the bent portion 231 can also effectively guide the air flow to turn, without affecting the function of the bent portion 231.

[0055] The present invention also provides an air conditioner, which includes an outdoor unit and an indoor unit. The specific structure of the indoor unit refers to the above-mentioned embodiments. Since this air conditioner adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one. Among them, the outdoor unit is connected to the indoor unit through a refrigerant pipe, and heat exchange is carried out between the outdoor unit and the indoor unit through the refrigerant.

[0056] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. An air conditioner indoor unit, characterized in that, it includes a volute, a volute tongue and a wind wheel. A wind channel is formed between the volute and the volute tongue. The wind wheel is arranged in the wind channel. The volute tongue includes a tongue root and a diffuser section connecting the tongue root. The air guiding surface of the tongue root located in the wind channel is provided with a plurality of tooth protrusions. The plurality of tooth protrusions are arranged at intervals along the axial direction of the wind wheel. The tooth protrusions extend from the free end of the tongue root towards the diffuser section direction; An air passing groove is formed between two adjacent tooth protrusions. The air passing groove includes a front section and a rear section. The rear section is adjacent to one end of the front section away from the diffuser section; The front section is flared along the air outlet direction, and the rear section is constricted along the air outlet direction.

2. The air conditioner indoor unit according to claim 1, characterized in that, a first included angle between two side wall surfaces of the front section is less than or equal to 90°, and a second included angle between two side wall surfaces of the rear section is less than or equal to 90°.

3. The air conditioner indoor unit according to claim 2, characterized in that, at least some of the plurality of first included angles are different from each other, and at least some of the plurality of second included angles are different from each other.

4. The air conditioner indoor unit according to claim 2, characterized in that, at the rated power of the air conditioner indoor unit, the linear velocity of the outer edge of the wind wheel is greater than 1.5 times the air flow velocity at the tongue root, and the first included angle is greater than the second included angle.

5. The air conditioner indoor unit according to claim 4, characterized in that, the first included angle is 2° - 20° larger than the second included angle.

6. The air conditioner indoor unit according to claim 2, characterized in that, at the rated power of the air conditioner indoor unit, the linear velocity of the outer edge of the wind wheel is less than 1.3 times the air flow velocity at the tongue root, and the first included angle is less than the second included angle.

7. The air conditioner indoor unit according to claim 6, characterized in that, the first included angle is 2° - 20° smaller than the second included angle.

8. The air conditioner indoor unit according to claim 2, characterized in that, at the rated power of the air conditioner indoor unit, the linear velocity of the outer edge of the wind wheel is 1.3 - 1.5 times the air flow velocity at the tongue root, and the absolute value of the angle difference between the first included angle and the second included angle is less than or equal to 2°.

9. The air conditioner indoor unit according to any one of claims 1 to 8, characterized in that, the tooth protrusion includes a bent portion and a rear portion. The rear portion is connected to one end of the bent portion away from the diffuser section. The tooth top of the tooth protrusion is located at the connection of the bent portion and the rear portion. The windward surface of the bent portion is an arc surface. The front section is formed between two adjacent bent portions, and the rear section is formed between two rear portions.

10. The air conditioner indoor unit according to claim 9, characterized in that, the radian of the windward surface of some of the bent portions is greater than the radian of the windward surface of another part of the bent portions.

11. The air conditioner indoor unit according to claim 9, characterized in that, the windward surface of the rear portion is an inclined surface.

12. The air conditioner indoor unit according to claim 9, characterized in that, the length of the bent portion is less than the length of the rear portion.

13. An air conditioner, characterized in that, Comprising an outdoor air conditioner unit and an indoor air conditioner unit as described in any one of claims 1 to 12, the outdoor air conditioner unit and the indoor air conditioner unit are connected by a refrigerant pipe.

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