Air conditioner indoor unit

Abstract

The present invention provides an air conditioner indoor unit, comprising a shell, the shell having an air inlet area, an upper air outlet and a lower air outlet on the front side of the shell, an upper air inlet and a lower air inlet on the rear side of the shell, two single-suction centrifugal fans arranged transversely and spaced apart in the shell, one of the single-suction centrifugal fans is configured to cause part of the heat exchange air to flow from one of the air inlet areas to the upper part of the accommodation space, and the other single-suction centrifugal fan is configured to cause part of the heat exchange air to flow from the other air inlet area to the lower part of the accommodation space; two air guide covers are distributed up and down in the shell, the air guide cover located at the upper part is configured to mix the corresponding heat exchange air and the natural wind from the upper air inlet and send them out from the upper air outlet, and the air guide cover located at the lower part is configured to mix the corresponding heat exchange air and the natural wind from the lower air inlet and send them out from the lower air outlet. Since the mixed air is relatively soft, it will make the user feel more comfortable when it blows on him, thereby improving the user's comfort experience.

Description

Technical Field

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

[0002] Existing wall-mounted air conditioner indoor units generally use cross-flow fans and bent evaporators for air supply. The air after heat exchange in the bent evaporator is directly blown out from the air outlet under the action of the internal cross-flow fan. The air delivered is not soft enough, especially in cooling mode, the cool air blown directly to the user, making the user feel uncomfortable. Summary of the invention

[0003] In view of the above problems, an object of the present invention is to provide an air conditioner indoor unit that overcomes the above problems or at least partially solves the above problems.

[0004] A further object of the present invention is to improve the air supply effect and air supply efficiency of the indoor unit.

[0005] The present invention provides an air conditioner indoor unit, comprising:

[0006] The housing has an air inlet area formed on both lateral sides of the housing, an upper air outlet is formed on the upper front side of the housing, a lower air outlet is formed on the lower front side of the housing, an upper air inlet opposite to the upper air outlet is formed on the upper rear side of the housing, and a lower air inlet opposite to the lower air outlet is formed on the lower rear side of the housing;

[0007] Two single-suction centrifugal fans are arranged in the accommodation space inside the shell, one of the single-suction centrifugal fans has an upward fan outlet configured to force part of the heat exchange air to flow from one of the air inlet areas to the upper part of the accommodation space, and the other single-suction centrifugal fan has a downward fan outlet configured to force part of the heat exchange air to flow from the other air inlet area to the lower part of the accommodation space;

[0008] Two air guide covers are respectively located at the upper and lower parts of the accommodating space. The air guide cover located at the upper part is configured to mix the heat exchange air from the upward fan outlet and the natural wind from the upper air outlet and send them out from the upper air outlet. The air guide cover located at the lower part is configured to mix the heat exchange air from the downward fan outlet and the natural wind from the lower air outlet and send them out from the lower air outlet.

[0009] Optionally, the upper air outlet and the lower air outlet are recorded as two air outlets of the air conditioner indoor unit, and the upper air inlet and the lower air inlet are recorded as two air inlet of the air conditioner indoor unit;

[0010] Each air guide cover has an air guide duct connected to the fan outlet of the corresponding single-suction centrifugal fan, the air guide duct is formed with an air guide inlet connected to the fan outlet of the corresponding single-suction centrifugal fan, the front side of the air guide duct is formed with an air guide outlet opposite to the corresponding outlet, and the rear side of the air guide duct is formed with an air guide inlet opposite to the corresponding inlet.

[0011] Optionally, the air conditioner indoor unit further includes:

[0012] Two air outlet pipes extending front and back and distributed up and down in the accommodation space, the air outlet pipe located at the top corresponds to the air guide cover located at the top, and the air outlet pipe located at the bottom corresponds to the air guide cover located at the bottom;

[0013] Each air outlet pipe comprises an outer pipe extending forward and backward and a first inner pipe connected to the inner peripheral wall of the outer pipe and extending from the back to the front in a gradually expanding manner to protrude from the front side of the outer pipe. The air inlet end of the outer pipe passes through the guide air outlet of the corresponding air guide cover and is located in the corresponding guide air duct, so that the mixed air flow enters the corresponding air outlet pipe;

[0014] The first inner tube air inlet end is located in the outer tube near the front end of the outer tube, the first inner tube air outlet end protrudes from the front side of the corresponding air outlet, and a first spacing space is formed between the inner peripheral wall of the outer tube and the outer peripheral wall of the first inner tube for mixed airflow to pass through.

[0015] Optionally, each air outlet pipe also includes a second inner tube, which extends gradually from back to front in the corresponding first inner tube, and a second spacing space is formed between the outer peripheral wall of the second inner tube and the inner peripheral wall of the corresponding first inner tube to facilitate the passage of the mixed airflow.

[0016] Optionally, each air outlet pipe is configured to be controllably movable in the front-to-rear direction between a position protruding from the front side of the corresponding air outlet and a position retracted to the corresponding air outlet;

[0017] When the air outlet pipe retracts to the position in the corresponding air outlet, the outer peripheral wall of the air outlet end of the first inner pipe abuts against the inner peripheral wall of the corresponding air outlet to close the first partition space, so that the mixed airflow is blown out from the second partition space and the second inner pipe to the front side respectively;

[0018] When the air outlet pipe is located at a position protruding from the front side of the corresponding air outlet, the air outlet end of the first inner pipe protrudes from the front side of the corresponding air outlet to expose the first partition space, so that the mixed airflow is blown toward the front side from the first partition space, the second partition space and the second inner pipe respectively.

[0019] Optionally, the inner peripheral wall of the outer tube includes a rear wall section and a front wall section which are sequentially connected in a direction from the air inlet end to the air outlet end of the outer tube, and the air inlet end of the first inner tube is located in a space formed by the front wall section to form a first spacing space between the front wall section and the outer peripheral wall of the first inner tube;

[0020] The rear wall section is a hollow truncated cone that gradually expands forward from the air inlet end of the outer tube, and the front wall section is a hollow truncated cone that gradually expands from the position connected to the rear wall section to the air outlet end of the outer tube; and

[0021] The taper angle of the rear wall section is greater than the taper angle of the front wall section.

[0022] Optionally, the first inner tube is in the shape of a hollow truncated cone with uniform wall thickness and gradually expanding from its air inlet end to its air outlet end, and the cone angle of the first inner tube is greater than the cone angle of the front wall section.

[0023] Optionally, the outer circumferential wall of the second inner tube is a truncated cone that gradually expands from back to front, the inner circumferential wall of the second inner tube is a truncated cone that gradually expands from the air inlet end to the air outlet end of the second inner tube, and the cone angle of the inner circumferential wall of the second inner tube is greater than the cone angle of the outer circumferential wall of the second inner tube, and the cone angle of the outer circumferential wall of the second inner tube is equal to the cone angle of the front wall section.

[0024] Optionally, the air conditioner indoor unit further includes:

[0025] The two heat exchangers correspond to the two air inlet areas one by one and are located inside the corresponding air inlet areas in the shell to perform heat exchange with the airflow entering the shell through the corresponding air inlet areas to form heat exchange air.

[0026] Optionally, the housing includes a rear shell with an open front side and a front panel located at the front side of the rear shell and forming a receiving space with the rear shell;

[0027] The upper air outlet and the lower air outlet are formed on the front surface of the front panel, the upper air inlet and the lower air inlet are formed on the rear surface of the rear shell, and two air inlet areas are formed on both lateral sides of the rear shell.

[0028] The air conditioner indoor unit of the present invention has two air outlets distributed up and down formed on the front side of the shell, and two air inlets distributed up and down formed on the rear side of the shell. Two single-suction centrifugal fans and two air guide covers are used to mix the heat exchange air flowing to the upper space of the shell with the natural wind entering from the upper air inlet, and then blow it forward from the upper air outlet, and mix the heat exchange air flowing to the lower space of the shell with the natural wind entering from the lower air inlet, and then blow it forward from the lower air outlet. Since the mixed air is relatively soft, it will make the user feel more comfortable when it blows on the user, thereby improving the user's comfort experience. In addition, the air conditioner indoor unit adopts two single-suction centrifugal fans. Compared with the traditional air conditioner indoor unit with one centrifugal fan, two relatively small single-suction centrifugal fans are adopted, which is convenient for more reasonable allocation of the internal accommodation space of the indoor unit and reducing the overall volume and thickness of the air conditioner indoor unit; furthermore, the two single-suction centrifugal fans can be independently controlled to operate, which is convenient for controlling the opening of different single-suction centrifugal fans according to different operating modes of the air conditioner indoor unit, thereby improving the cooling and heating experience.

[0029] Furthermore, in the air-conditioning indoor unit of the present invention, air outlet ducts are respectively arranged at the two air outlets. The air outlet ducts with specially designed structures are used to expand the air outlet range and air supply uniformity of the indoor unit, thereby greatly improving the air supply comfort of the indoor unit.

[0030] Furthermore, in the air-conditioning indoor unit of the present invention, the two air outlet ducts can be moved forward and backward in a controlled manner, and the air outlet range, air outlet distance, air outlet uniformity and air supply efficiency of the two air outlet ducts of the indoor unit can be adjusted according to different operating modes of the indoor unit, thereby further enhancing the air supply effect of the indoor unit and improving the user's comfort experience.

[0031] 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

[0032] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0033] Figure 1 is a schematic structural diagram of an air-conditioning indoor unit 10 in one direction according to an embodiment of the present invention;

[0034] Figure 2 is a schematic structural diagram of an air-conditioning indoor unit 10 in another direction according to an embodiment of the present invention;

[0035] Figure 3 is an exploded schematic diagram of an air conditioner indoor unit according to an embodiment of the present invention;

[0036] Figure 4 is a schematic structural diagram of an air outlet duct of an indoor unit of an air conditioner according to an embodiment of the present invention; and

[0037] Figure 5 4 is a cross-sectional schematic diagram of an air outlet duct of an indoor unit of an air conditioner according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] Refer to the following Figures 1 to 5 The indoor unit 10 of the air conditioner according to the embodiment of the present invention is described. The directions or positional relationships indicated by “front”, “rear”, “upper”, “lower”, “inner”, “outer”, “lateral”, etc. 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.

[0039] Figure 1 is a schematic structural diagram of an air-conditioning indoor unit 10 according to one embodiment of the present invention.

[0040] Figure 2 FIG. 1 is a schematic structural diagram of an air-conditioning indoor unit 10 in another direction according to an embodiment of the present invention. FIG. 3 is an exploded schematic diagram of an air-conditioning indoor unit 10 according to an embodiment of the present invention.

[0041] The air-conditioning indoor unit of the present embodiment is a wall-mounted air-conditioning indoor unit 10, comprising a shell, with an air inlet area 11a formed on each lateral side of the shell, the shell having two air outlets, one air outlet formed at the upper front side of the shell, denoted as the upper air outlet 12a, the other air outlet formed at the lower front side of the shell, denoted as the lower air outlet 12b, the rear side of the shell having two air inlets, one air inlet formed at the upper rear side of the shell opposite to the upper air outlet 12a, denoted as the upper air inlet 11b, the other air inlet formed at the lower rear side of the shell opposite to the lower air outlet 12b, denoted as the lower air inlet 11c.

[0042] The front-to-back direction is Figure 1 The indicated direction, the lateral direction is the horizontal direction perpendicular to the front-to-back direction.

[0043] The air conditioner indoor unit 10 further includes two heat exchangers 13, which correspond to the two air inlet areas 11a one by one and are respectively arranged inside the corresponding air inlet areas 11a in the housing to perform heat exchange with the ambient air entering through the corresponding air inlet areas 11a to form heat exchange air.

[0044] The indoor unit 10 further includes two single-suction centrifugal fans 14 disposed in the accommodation space inside the housing and two air guide covers 15 corresponding to the two single-suction centrifugal fans 14 and located at the upper and lower parts of the accommodation space, respectively. One of the single-suction centrifugal fans 14 has an upward fan outlet 14b configured to cause part of the heat exchange air to flow from one of the air inlet areas 11a to the upper part of the accommodation space, and the other single-suction centrifugal fan 14 has a downward fan outlet 14b configured to cause part of the heat exchange air to flow from the other air inlet area 11a to the lower part of the accommodation space. The air guide cover 15 located at the upper part is configured to mix the heat exchange air from the upward fan outlet 14b and the natural wind from the upper air inlet 11b and send it out from the upper air outlet 12a, and the air guide cover 15 located at the lower part is configured to mix the heat exchange air from the downward fan outlet 14b and the natural wind from the lower air inlet 11c and send it out from the lower air outlet 12b.

[0045] In some embodiments, the housing includes a rear housing 11 with an open front side and a front panel 12 located at the front side of the rear housing 11 and forming a receiving space with the rear housing 11. The rear housing 11 is formed with air inlet areas 11a on both sides in the horizontal direction, and the rear portion of the rear housing 11 is formed with upper air inlets 11b and lower air inlets 11c distributed up and down, respectively. The upper portion of the front panel 12 is formed with an upper air outlet 12a, and the lower portion of the front panel 12 is formed with a lower air outlet 12b. The rear housing 11 is spaced a certain distance from the wall on which the indoor unit 10 is installed, so as to ensure that natural wind enters the housing from the rear side through the upper air inlets 11 and the lower air inlets 11c.

[0046] The air conditioner indoor unit 10 of the present embodiment has two air outlets distributed up and down on the front side of the shell and two air inlet ports distributed up and down on the rear side of the shell. The air guide cover 15 matches the fluid design of the corresponding single-suction centrifugal fan 14. Two single-suction centrifugal fans 14 and two air guide covers 15 are used to achieve mixing of heat exchange air and natural wind in the air guide cover 15, and the air is blown out to the front side through the two air outlets respectively. Since the mixed air is softer, it will make the user feel more comfortable when it blows on the user, thereby improving the user's comfort experience.

[0047] The rotating shafts of the two single-suction centrifugal fans 14 both extend laterally. The two single-suction centrifugal fans 14 are located on both sides of the vertical center line of the shell in the lateral direction. The fan air inlet 14a of one single-suction centrifugal fan 14 faces the air inlet area 11a located on the same side as the single-suction centrifugal fan 14, and the fan air inlet 14a of the other single-suction centrifugal fan 14 faces the air inlet area 11a located on the same side as the single-suction centrifugal fan 14. That is to say, the fan air inlets 14a of the two single-suction centrifugal fans 14 are opposite to each other and face the corresponding air inlet areas 11a respectively, so as to encourage the ambient air around the indoor unit 10 to enter the shell through the corresponding air inlet areas 11a.

[0048] The projection of the shell in a plane parallel to the rotating shaft of the single-suction centrifugal fan 14 is circular, and the projections of the upper air outlet 12a and the lower air outlet 12b in the vertical plane are both circular, making the entire air-conditioning indoor unit 10 unique and beautiful in appearance, completely different from the existing long wall-mounted air-conditioning indoor unit 10, and meeting the user's personalized aesthetic needs.

[0049] In the existing scheme, the air conditioner indoor unit 10 with similar appearance has an air outlet and a centrifugal fan. In order to meet the air supply demand of the air conditioner indoor unit 10, the centrifugal fan has a large power and a large volume, resulting in a large overall thickness of the air conditioner indoor unit 10 (the size of the air conditioner indoor unit 10 in the front and rear directions), and an air outlet is opened on the flat surface of the front side of the indoor unit 10, which affects the overall aesthetics of the indoor unit 10. In this embodiment, a new improvement is made to the appearance and internal structure of the air conditioner indoor unit 10, and the air supply of the air conditioner indoor unit 10 is realized by adopting two single-suction centrifugal fans 14. The sizes of the two single-suction centrifugal fans 14 are relatively small, which can more reasonably allocate the accommodation space in the shell, and greatly reduce the overall volume and thickness of the air conditioner indoor unit 10; and, by forming an upper air outlet 12a at the upper part of the front side of the shell and a lower air outlet 12b at the lower part of the front side of the shell, the upper air outlet 12a and the lower air outlet 12b complement each other, avoiding the visual abruptness of one air outlet, making the overall appearance of the indoor unit 10 more harmonious and beautiful, and meeting the higher aesthetic needs of users.

[0050] In addition, since the indoor unit 10 has two independent single-suction centrifugal fans 14 and two independent air outlets, the states of the two single-suction centrifugal fans 14 can be controlled according to the operation mode of the indoor unit 10 to control the air outlet position, achieve better heating / cooling effect and improve air supply comfort. For example, in the cooling mode, the single-suction centrifugal fan 14 that causes part of the air flow to flow to the upper part of the housing space in the shell can be controlled to turn on. Under the action of the single-suction centrifugal fan 14, the cold air flows upward, mixes with the natural air entering from the upper air inlet 11b in the air guide cover 15, and blows forward through the upper air outlet 12a, while the other single-suction centrifugal fan 14 (the air supply fan that causes part of the air flow to flow to the lower part of the housing space in the shell) remains in a closed state, and the mixed air is only blown forward from the upper air outlet 12a, raising the cold air outlet position to prevent the cold air from blowing directly downward to the user and causing discomfort to the user. Since cold air tends to sink, try to make the cold air blow upwards to improve the cooling effect and avoid the cold air blowing directly on the human body and affecting the user's cooling experience.

[0051] In heating mode, the single-suction centrifugal fan 14 that causes part of the airflow to flow to the lower part of the storage space in the shell can be controlled to be turned on, while the other single-suction centrifugal fan 14 (the air supply fan that causes part of the airflow to flow to the upper part of the storage space in the shell) is turned off, and the hot air is mixed with the natural wind from the lower air inlet 11c and blown forward from the lower air outlet 12b, lowering the hot air outlet position, avoiding the hot air rising and causing the temperature of the lower space in the room to fail to rise in time, affecting the user's heating experience. Since hot air has an upward trend, the hot air is blown downward as much as possible, so that the temperature of the upper space and the temperature of the lower space in the room are uniform, improving the heating effect and the user's heating experience.

[0052] In some embodiments, Figure 3 As shown, each air guide cover 15 has an air guide duct connected to the fan outlet 14b of the corresponding single-suction centrifugal fan 14, and the air guide duct is formed with an air guide inlet 15a connected to the fan outlet 14b of the corresponding single-suction centrifugal fan 14. For example, the air guide inlet 15a of the air guide duct of one air guide cover 15 is upward to be connected to the upward fan outlet 14b, and the air guide inlet 15a of the air guide duct of the other air guide cover 15 is downward to be connected to the downward fan outlet 14b.

[0053] A guide air outlet (not shown) opposite to the corresponding air outlet (upper air outlet 12a or lower air outlet 12b) is formed on the front side of the guide air duct, and a guide air inlet 15c opposite to the corresponding air inlet (upper air inlet 11b or lower air inlet 11c) is formed on the rear side of the guide air duct. Negative pressure is formed in the guide air duct, so that the air in the surrounding environment of the upper air inlet 11b and the lower air inlet 11c enters the guide air duct through the upper air inlet 11b and the lower air inlet 11c respectively under the action of the negative pressure to mix with the heat exchange air, thereby ensuring the comfort of the air outlet. In addition, the guide cover 15 is used to cooperate with the single-suction centrifugal fan 14 to achieve smooth transition air supply, which can reduce air flow loss and turbulence, thereby improving air supply efficiency and reducing noise.

[0054] It can be understood that the single-suction centrifugal fan 14 generally includes a volute (not marked) having a accommodating chamber and an impeller (not shown) arranged in the accommodating chamber. In this embodiment, the accommodating chamber should extend laterally, the accommodating chamber has a fan air inlet 14a, the volute has a fan air outlet 14b connected to the accommodating chamber, and the impeller can rotate around the transverse axis relative to the volute 141.

[0055] In some embodiments, in order to reduce the overall structural size of the entire indoor unit 10, two efficient single-suction centrifugal fans 14 are required to supply air, so as to improve the performance requirements on the basis of meeting the appearance size of the indoor unit 10. Based on the pressure loss of the centrifugal fan, with the help of simulation analysis, this embodiment preferably uses two single-suction backward centrifugal fans as the two single-suction centrifugal fans 14 of this embodiment, and each single-suction backward centrifugal fan meets the following conditions:

[0056] A single-suction backward centrifugal fan refers to a centrifugal fan with a blade installation outlet less than 90°. In this embodiment, preferably, the blade installation outlet angle βb2 of the impeller of each single-suction backward centrifugal fan satisfies: 30° ≤βb2≤40°. For example, the blade installation outlet angle βb2 of each single-suction backward centrifugal fan is 35°. The specific speed ns of each single-suction backward centrifugal fan satisfies 58≤ns≤60. For example, the specific speed ns of each single-suction backward centrifugal fan is 59.48. The circumferential speed u2 of each single-suction backward centrifugal fan satisfies 11≤u2≤12 m / s. For example, the circumferential speed u2 of each single-suction backward centrifugal fan is 11.83 m / s. The total pressure coefficient Ψ of each single-suction backward centrifugal fan satisfies 0.7≤Ψ≤0.9. For example, the total pressure coefficient Ψ of each single-suction backward centrifugal fan is 0.88.

[0057] In this way, by adopting a single-suction backward centrifugal fan as the air supply fan of this embodiment, the air supply efficiency is higher than that of the forward centrifugal fan, and since the air flow through the curved blade path of the air supply fan forms a speed difference due to the centrifugal force, the single-suction backward centrifugal fan can alleviate the degree of unevenness caused by the air flow speed difference. In addition, by limiting the installation outlet angle βb2, specific speed ns, circumferential speed u2 and total pressure coefficient Ψ of the single-suction backward centrifugal fan to the above special numerical range, the pressure loss of the single-suction backward centrifugal fan can be reduced and the air intake of the single-suction backward centrifugal fan can be increased. At the same time, under the premise of ensuring the above-mentioned better performance of the single-suction backward centrifugal fan, the size of each single-suction backward centrifugal fan can be adjusted to a lower size, for example, each single-suction backward centrifugal fan meets: Ф120*80mm, that is, the diameter of the volute is 120 mm and the thickness is 80 mm.

[0058] This ensures that the size of the indoor unit 10 can be adjusted to a lower size. For example, the overall size of the shell is Φ500*200mm, that is, the diameter of the shell is 500mm and the thickness is 220mm. The diameters of the upper air outlet 12a and the lower air outlet 12b can both be 120mm. Under the premise of ensuring the air supply performance of the indoor unit 10, the overall size of the indoor unit 10 is reduced to meet the user's demand for a miniaturized appearance of the air conditioner indoor unit 10.

[0059] Figure 4 is a schematic structural diagram of an air outlet duct 18 of an air conditioner indoor unit 10 according to an embodiment of the present invention. Figure 5 FIG. 1 is a schematic cross-sectional view of an air outlet duct 18 of an air conditioner indoor unit 10 according to an embodiment of the present invention.

[0060] In some embodiments, Figure 1 , Figure 3 , and refer to Figure 4 and Figure 5 The air conditioner indoor unit 10 also includes two air outlet ducts 18 extending frontward and rearward and distributed up and down in the accommodating space of the shell. The upper air outlet duct 18 corresponds to the upper air guide cover 15, and the lower air outlet duct 18 corresponds to the lower air guide cover 15.

[0061] Each outlet pipe 18 includes an outer pipe 181 extending forward and backward and a first inner pipe 182 connected to the inner peripheral wall of the outer pipe 181 and extending from the back to the front in a gradually expanding manner to protrude from the front side of the outer pipe 181. The air inlet end of the outer pipe 181 passes through the corresponding guide air outlet of the guide cover 15 and is located in the corresponding guide air duct, so that the mixed air flow enters the corresponding outlet pipe 18 from the guide air duct through the air inlet end of the outer pipe 181. The air inlet end of the first inner pipe 182 is located in the outer pipe 181 near the front end of the outer pipe 181, and the air outlet end of the first inner pipe 182 protrudes from the front side of the corresponding air outlet, and a first spacing space 103 is formed between the inner peripheral wall of the outer pipe 181 and the outer peripheral wall of the first inner pipe 182, that is, the first inner pipe 182 is a trumpet-shaped structure from the back to the front, and the outer pipe 181 and the first inner pipe 182 form a round pipe, and part of the mixed air flow can flow forward through the internal space of the first inner pipe 182, and part of the mixed air flow can flow forward through the first spacing space 103. This increases the air outlet range and achieves a better air supply effect.

[0062] In some embodiments, Figure 4 and Figure 5 As shown, each air outlet pipe 18 further includes a second inner pipe 183 , which gradually extends from rear to front in the corresponding first inner pipe 182 , and a second spacing space 104 is formed between the outer circumferential wall of the second inner pipe 183 and the inner circumferential wall of the corresponding first inner pipe 182 . The heat exchange air flowing to the upper part of the housing space and the natural wind from the upper air inlet 11b are mixed in the guide air duct and enter the outer tube 181 through the air inlet end of the air outlet 18 located above (that is, the air inlet end of the outer tube 181). The mixed air flow entering the outer tube 181 is divided into three parts, part of the mixed air flows forward through the space in the second inner tube 183, part of the mixed air flows forward through the first partition space 103, and part of the mixed air flows forward through the second partition space 104; the heat exchange air flowing to the lower part of the housing space and the natural wind from the lower air inlet 11b are mixed in the guide air duct and enter the outer tube 181 through the air inlet end of the air outlet 18 located below. Similarly, the mixed air flow entering the outer tube 181 is divided into three parts and blown forward. As a result, the air flow is blown forward in a more dispersed manner, further improving the uniformity and comfort of air supply.

[0063] The air-conditioning indoor unit 10 of this embodiment utilizes the special structure of the air outlet duct 18 to increase the negative pressure of the guide air duct of the air guide cover 15, so that the ambient air around the upper air inlet 11b and the lower air inlet 11c enters the guide air duct in turn under the action of the negative pressure to mix with the heat exchange air, and then enters the air outlet duct 18 to be blown to the front side, thereby increasing the overall air intake volume of the air-conditioning indoor unit 10 and accelerating the flow of indoor air.

[0064] In addition, in this embodiment, by designing each air outlet pipe 18 as a meandering structure as described above, the air outlet range can be increased and a wide-area air supply effect can be achieved; and the mixed air flow is diffused toward the front side of the air outlet corresponding to the indoor unit 10, sucking the surrounding air to flow forward, further improving the uniformity of air supply, making the wind softer and more natural, and feeling cool but not cold when blowing on people, thereby improving user comfort.

[0065] The first inner tube 182 passes through the bracket ( Figure 5 ) is connected to the inner wall of the outer tube 181, and the second inner tube is connected to the inner wall of the outer tube 181 by another bracket ( Figure 5 The bracket (not shown) is connected to the inner wall of the first inner tube 182, and the bracket plays the role of fixing the first inner tube 182 and the second inner tube 183, and is small in size to avoid blocking the forward flow of the airflow. For example, the outer wall of the first inner tube 182 is spaced apart with a plurality of first connecting rods (not shown) along the circumferential direction, and the plurality of first connecting rods constitute the aforementioned bracket, and the first inner tube 182 is fixed to the outer tube through the plurality of first connecting rods distributed at intervals. Correspondingly, the outer wall of the second inner tube 183 is distributed with a plurality of second connecting rods (not shown), and the plurality of second connecting rods constitute the aforementioned other bracket, and the second inner tube 183 is fixed to the first inner tube 182 through the plurality of second connecting rods distributed at intervals.

[0066] In some embodiments, each air outlet duct 18 is further configured to be controllably movable along the front-to-back direction between a position protruding from the front side of the air outlet of the corresponding indoor unit 10 and a position retracted into the air outlet of the corresponding indoor unit 10, that is, the upper air outlet duct 18 is configured to be controllably movable along the front-to-back direction between a position protruding from the front side of the upper air outlet 12a and a position retracted into the upper air outlet 12a, and the lower air outlet duct 18 is configured to be controllably movable along the front-to-back direction between a position protruding from the front side of the lower air outlet 12b and a position retracted into the lower air outlet 12b.

[0067] When the air outlet pipe 18 is controlled to retract backward to the position in the corresponding air outlet, the outer peripheral wall of the air outlet end of the first inner tube 182 abuts against the inner peripheral wall of the corresponding air outlet to close the first partition space 103, so that part of the mixed air flow is blown out from the second inner tube 183 to the front side, and part of the mixed air flow is blown out from the second partition space 104 to the front side. That is to say, when the air outlet duct 18 located at the top is controlled to retract to the position in the upper air outlet 12a, the outer peripheral wall of the air outlet end of the first inner tube 182 of the air outlet duct 18 abuts against the inner peripheral wall of the upper air outlet 12a, and part of the mixed air flow is blown forward from the second inner tube 183 of the air outlet duct 18 located at the top, and part of the mixed air flow is blown forward from the second partition space 104 to the front side; when the air outlet duct 18 located at the bottom is controlled to retract to the position in the lower air outlet 12b, the outer peripheral wall of the air outlet end of the first inner tube 182 of the air outlet duct 18 abuts against the inner peripheral wall of the lower air outlet 12b, and part of the mixed air flow is blown forward from the second inner tube 183 of the air outlet duct 18 located at the bottom, and part of the mixed air flow is blown forward from the second inner tube 183 of the air outlet duct 18 located at the bottom, and part of the mixed air flow is blown forward from the second partition space 104 to the front side.

[0068] When the air outlet duct 18 is controlled to move forward to a position protruding from the front side of the corresponding air outlet, the air outlet end of the first inner tube 182 protrudes from the front side of the corresponding air outlet. Since the first inner tube 182 gradually expands from the back to the front, it can be understood that the outer diameter of the front section of the first inner tube 182 is greater than the outer diameter of the rear section. When the air outlet duct 18 moves forward, the air outlet end of the first inner tube 182 is separated from the inner circumferential wall of the corresponding air outlet, and the air outlet end of the first inner tube 182 protrudes from the front side of the corresponding air outlet, so that the space between the outer wall of the first inner tube 182 and the inner wall of the outer tube 181 (the first partition space 103) is exposed, so that the mixed airflow in the first partition space 103, the second partition space 104 and the second inner tube 183 is blown forward.

[0069] See again Figure 3 and Figure 4 The air-conditioning indoor unit 10 of this embodiment also includes two driving units, and the two driving units correspond to the two air outlet ducts 18 one by one. Each driving unit may include a rack 102, a gear (not shown) and a motor (not shown) for driving the gear to rotate, wherein the motor is arranged in the accommodating space of the shell, and the gear is engaged with the rack 102 to drive the corresponding air outlet duct 18 to move along the front-to-back direction between a position protruding from the front side of the corresponding air outlet and a position retracted into the corresponding air outlet.

[0070] The length of the tooth segment where the rack 102 meshes with the gear should be equal to or greater than the distance between the corresponding air outlet end of the outer tube 181 and the air outlet end of the first inner tube 182, so as to ensure that the air outlet duct 18 moves forward so that the part of the first inner tube 182 located in front of the outer tube 181 completely extends out of the corresponding air outlet of the indoor unit 10, so as to further increase the air outlet range and air supply distance, and improve the air supply efficiency and air outlet uniformity.

[0071] The rack 102 can be formed on the outer peripheral wall of the corresponding air outlet duct 18, extending from front to rear. The two air guide ducts of the two air guide covers 15 are formed with forward and backward extending notches (not shown) adapted to the rack 102 on the corresponding air outlet duct 18. The rack 102 passes through the notch so that the teeth of the rack 102 are exposed on the outside of the air guide duct of the air guide cover 15 to engage with the corresponding gear, thereby realizing the forward and backward movement of the air outlet duct 18 and maintaining the sealing of the air guide duct. The length of the rack 102 is sufficient to extend along the corresponding notch to the rear side of the air guide duct, so as to ensure that when the air outlet duct 18 moves forward, the notch of the air guide duct is always covered by the rack 102 to ensure the sealing of the air guide duct.

[0072] The outer peripheral wall of the air inlet end of the air outlet pipe 18 is in sliding contact with the inner peripheral wall of the corresponding guide air duct. During the forward and backward movement of the air outlet pipe 18, the rear section of the air outlet pipe 18 is always in the guide air duct of the corresponding guide cover 15. It can be understood that the size of the air outlet pipe 18 and the size of the guide air duct need to ensure that when the air outlet pipe 18 moves forward or backward, the heat exchange air can enter the guide air duct through the guide air inlet 15a of the guide cover 15.

[0073] The air conditioner indoor unit 10 of the present embodiment controls the air outlet duct 18 to move between a position retracted into the corresponding air outlet and a position protruding from the front side of the corresponding air outlet. When the air outlet duct 18 protrudes from the front side of the corresponding air outlet, air flows forward in the first partition space 103, the second partition space 104 and the second inner tube 183, thereby expanding the air outlet range and lengthening the air supply distance, thereby further improving the air supply uniformity and comfort. In addition, since the air flow is divided into three parts, the eddy current loss can be effectively reduced and the air supply efficiency can be improved.

[0074] In addition, the movement of the two air outlet ducts 18 and the state of the two single-suction centrifugal fans 14 can be controlled according to the operation mode of the air conditioner indoor unit 10. For example, in the cooling mode, the air outlet duct 18 corresponding to the upper air outlet 12a can be controlled to move to a position protruding from the front side of the upper air outlet 12a, and the single-suction centrifugal fan 14 that causes part of the air flow to flow to the upper part of the housing space in the shell can be controlled to open; and the air outlet duct 18 corresponding to the lower air outlet 12b can be kept in the lower air outlet 12b and does not move forward. Correspondingly, the corresponding single-suction centrifugal fan 14 (that is, the single-suction centrifugal fan 14 that causes part of the air flow to flow to the lower part of the housing space in the shell) remains closed, and the mixed cold air is only blown forward through the air outlet duct 18 located at the upper part, raising the cold air outlet position to avoid the cold air blowing directly downward to the user and causing discomfort to the user. Since the cold air has a tendency to sink, the cold air is blown upward as much as possible to improve the cooling effect and avoid the cold air blowing directly to the human body and affecting the user's cooling experience. In addition, since the air outlet duct 18 located at the upper portion is moved forward to protrude from the front side of the upper air outlet 12a, the air supply range is expanded, the air supply uniformity is improved, and the user's cooling comfort experience is further enhanced.

[0075] In heating mode, the air outlet 18 corresponding to the lower air outlet 12b can be controlled to move to a position protruding from the front side of the lower air outlet 12b, and the corresponding single-suction centrifugal fan 14 (that is, the single-suction centrifugal fan 14 that causes part of the airflow to flow to the lower part of the storage space in the shell) can be controlled to open, while the air outlet 18 corresponding to the upper air outlet 12a can be kept in the upper air outlet 12a and does not move forward. Correspondingly, the corresponding single-suction centrifugal fan 14 (that is, the single-suction centrifugal fan 14 that causes part of the airflow to flow to the upper part of the storage space in the shell) remains closed, and the mixed hot air is only blown forward through the air outlet 18 located at the bottom, which lowers the hot air outlet position, avoids the hot air rising and causing the temperature of the lower space in the room to fail to rise in time, affecting the user's heating experience. Since the hot air has an upward trend, the hot air is blown downward as much as possible, so that the temperature of the upper space and the temperature of the lower space in the room are uniform, improving the heating effect and the user's heating experience. In addition, since the air outlet duct 18 at the lower portion is moved forward to protrude from the front side of the lower air outlet 12b, the air supply range is expanded, the air supply uniformity is improved, and the heating comfort experience of the user is further enhanced.

[0076] In this embodiment, see again Figure 3The air conditioner indoor unit 10 further includes an electric control board 17, which is disposed between the two single-suction centrifugal fans 14. The electric control board 17 is configured to control the operation of the two single-suction centrifugal fans 14. In some embodiments, the electric control board 17 also controls the movement of the two air outlet ducts 18. The electric control board 17 is arranged in the space between the two single-suction centrifugal fans 14, so that the arrangement of the components in the housing is compact and orderly, and the overall size of the indoor unit 10 is further reduced.

[0077] In some embodiments, Figure 5 As shown, the inner circumferential wall of the outer tube 181 of each air outlet duct 18 includes a rear wall section 181a and a front wall section 181b which are connected in sequence from the air inlet end to the air outlet end of the outer tube 181. The rear wall section 181a is a hollow truncated cone which gradually expands from the air inlet end of the outer tube 181 to the front, and the front wall section 181b is a hollow truncated cone which gradually expands from the position connected to the rear wall section 181a to the air outlet end of the outer tube 181, and the cone angle 2e of the rear wall section 181a is greater than the cone angle 2c of the front wall section 181b. It can also be understood that the inner circumferential wall of the outer tube 181 is divided into two sections from the rear end to the front end of the outer tube 181, namely the rear wall section 181a and the front wall section 181b, and the rear wall section 181a is a trumpet-shaped which gradually expands from the back to the front, and the front wall section 181b is a trumpet-shaped which gradually expands from the back to the front, and the degree of gradual expansion of the rear wall section 181a is greater than that of the front wall section 181b. As shown Figure 5 As shown, angle e is the angle between the wall surface of the rear wall section 181a and the horizontal line extending front and back, and the cone angle of the rear wall section 181a is 2e; angle c is the angle between the wall surface of the front wall section 181b and the horizontal line extending front and back, and the cone angle of the front wall section 181b is 2c.

[0078] The air inlet end of the first inner tube 182 is located in the space formed by the front wall section 181b, so as to form a first spacing space 103 between the front wall section 181b and the outer peripheral wall of the first inner tube 182, so as to ensure that the airflow enters the outer tube 181, is first mixed and combed in the rear wall section 181a of the outer tube 181, and then flows forward and blows out along different flow paths, so as to reduce eddy current loss. The air inlet end of the first inner tube 182 (that is, the rear end of the first inner tube 182) is approximately the same distance from the rear end of the front wall section 181b of the outer tube 181 as from the front end of the front wall section 181b (that is, the air outlet end of the outer tube 181).

[0079] In some embodiments, Figure 5 As shown, the first inner tube 182 is a hollow truncated cone with uniform wall thickness, which gradually expands from its air inlet end to its air outlet end, and the cone angle 2b of the first inner tube 182 is greater than the cone angle 2c of the front wall section 181b of the outer tube 181. It can also be understood that the first inner tube 182 is a gradually expanding trumpet shape from its rear end to the front end.

[0080] In some embodiments, Figure 5As shown, the second inner tube 183 of the air outlet duct 18 extends from the back to the front in a gradually expanding manner in the corresponding first inner tube 182. It can be understood that the second inner tube 183 is entirely in the first inner tube 182, and is in a gradually expanding trumpet shape from the back to the front. The outer peripheral wall of the second inner tube 183 is a truncated cone that gradually expands from the back to the front. The inner peripheral wall of the second inner tube 183 is a truncated cone that gradually expands from the air inlet end to the air outlet end of the second inner tube 183, that is, the inner peripheral wall of the second inner tube 183 is a truncated cone that gradually expands from the back to the front. The cone angle 2d of the inner peripheral wall of the second inner tube 183 is greater than the cone angle 2a of the outer peripheral wall of the second inner tube 183, and the cone angle 2a of the outer peripheral wall of the second inner tube is equal to the cone angle 2c of the front wall section 181b of the outer tube 181.

[0081] By limiting the shapes of the outer tube 181, the first inner tube 182, and the second inner tube 183 to the above structure, the negative pressure of the corresponding guide air duct of the deflector 15 is further increased, and the air intake of the indoor unit 10 is increased; and while expanding the air outlet range, the eddy current loss is further reduced, and the air supply efficiency is improved; and the air outlet is made softer and more uniform.

[0082] In some embodiments, the cone angle 2c of the front wall section 181b satisfies: 0°<2a=2c≤40°, and the cone angle 2e of the rear wall section 181a satisfies: 0°<2e≤50°, for example, the cone angle 2c of the front wall section 181b is 7.8°, and the cone angle 2e of the rear wall section 181a is 46.2°. In some embodiments, the cone angle 2b of the first inner tube 182 may satisfy: 20°<2b≤80°, and the cone angle 2d of the inner circumferential wall of the second inner tube 183 may satisfy: 30°<2d≤60°, for example, the cone angle 2b of the first inner tube 182 is 60°, and the cone angle 2d of the inner circumferential wall of the second inner tube 183 is 45°. The air outlet duct 18 thus formed can further reduce eddy current loss and improve air supply efficiency.

[0083] See again Figure 1 , the diameter of the upper air outlet 12a is equal to the diameter of the lower air outlet 12b, and the ratio of the diameter of the upper air outlet 12a to the diameter of the shell is in the range of 0.2:1 to 0.3:1. For example, the ratio of the diameter of the upper air outlet 12a to the diameter of the shell is 0.26. In some embodiments, the upper air outlet 12a and the lower air outlet 12b are symmetrically distributed relative to the transverse center line of the shell. By designing the upper air outlet 12a and the lower air outlet 12b to be circular and symmetrically distributed, the upper air outlet 12a and the lower air outlet 12b are designed to meet the aesthetic standards of the public, and the aesthetics and coordination of the indoor unit 10 are further increased.

[0084] In some embodiments, the ratio of the distance dimension between the center point of the upper air outlet 12a and the center point of the lower air outlet 12b to the shell diameter dimension is in the range of 0.6:1 to 0.75:1. For example, the ratio of the distance dimension between the center point of the upper air outlet 12a and the center point of the lower air outlet 12b to the shell diameter dimension is 0.66. The position and size of the upper air outlet 12a and the lower air outlet 12b are designed in this way, so that the size and position of the upper air outlet 12a and the lower air outlet 12b can be more harmoniously matched with the overall size of the front panel 12, further increasing the aesthetics and coordination of the indoor unit 10.

[0085] The two air inlet areas of the air conditioner indoor unit 10 can be relatively distributed, such as Figures 1 to 3 As shown, for the air conditioner indoor unit 10 with a circular appearance, the air inlet areas 11a formed on both sides of the shell are also relatively arc-shaped. The projection of each heat exchanger 13 in a plane parallel to the rotating shaft of the single-suction centrifugal fan 14 is an arc-shaped to match the corresponding air inlet area 11a, increase the air inlet area, reduce the air inlet resistance, and improve the heat exchange efficiency of the heat exchanger 13. The center of the arc-shaped heat exchanger 13 can coincide with the center of the shell, and the two heat exchangers 13 are symmetrically distributed relative to the vertical center line of the shell, which ensures the size of the heat exchanger 13 and can also provide sufficient remaining space for the arrangement of the air supply fan and other components in the shell.

[0086] In some embodiments, Figure 3 As shown, the air conditioner indoor unit 10 further includes a water receiving pan 16, which is located at the bottom of the heat exchanger 13 in the accommodation space inside the housing and is used to receive condensed water formed by the heat exchanger 13. Figure 3 As shown, there are two water receiving pans 16, and the two water receiving pans 16 correspond to the two heat exchangers 13 one by one, and are respectively located at the bottom of the corresponding heat exchangers 13. A drain port (not shown) is formed at the bottom of each water receiving pan 16, and the drain port is connected to a drain pipe, through which the condensed water received in the water receiving pan 16 is discharged.

[0087] In this embodiment, an air inlet area 11a is formed on both lateral sides of the shell, so as to increase the air intake volume of the indoor unit 10 on the one hand, and facilitate the arrangement of the water receiving tray 16 on the other hand, so that the arrangement position of the water receiving tray 16 is more reasonable, which is convenient for receiving the condensed water of the heat exchanger 13 and more reasonably allocates the space utilization in the shell.

[0088] 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 conditioner indoor unit, comprising: A shell, wherein an air inlet area is formed on each of the two lateral sides of the shell, an upper air outlet is formed on the upper front side of the shell, a lower air outlet is formed on the lower front side of the shell, an upper air inlet opposite to the upper air outlet is formed on the upper rear side of the shell, and a lower air inlet opposite to the lower air outlet is formed on the lower rear side of the shell; The projections of the upper air outlet and the lower air outlet on the vertical plane are both circular; Two single-suction centrifugal fans are arranged in the accommodation space inside the shell, one of the single-suction centrifugal fans has an upward fan outlet, configured to cause part of the heat exchange air to flow from one of the air inlet areas to the upper part of the accommodation space, and the other single-suction centrifugal fan has a downward fan outlet, configured to cause part of the heat exchange air to flow from the other air inlet area to the lower part of the accommodation space; Two air guide covers are respectively located at the upper part and the lower part of the accommodation space, the air guide cover located at the upper part is configured to mix the heat exchange air from the upward fan air outlet and the natural wind from the upper air inlet and send them out from the upper air outlet, and the air guide cover located at the lower part is configured to mix the heat exchange air from the downward fan air outlet and the natural wind from the lower air inlet and send them out from the lower air outlet; The upper air outlet and the lower air outlet are recorded as two air outlets of the air conditioner indoor unit, and the upper air inlet and the lower air inlet are recorded as two air inlet of the air conditioner indoor unit; Two air outlet pipes extending front and back and distributed up and down in the accommodation space, the air outlet pipe located at the top corresponds to the air guide cover located at the top, and the air outlet pipe located at the bottom corresponds to the air guide cover located at the bottom; Each of the air outlet pipes comprises an outer pipe extending forward and backward and a first inner pipe connected to the inner peripheral wall of the outer pipe and extending from the back to the front in a gradually expanding manner to protrude from the front side of the outer pipe. The air inlet end of the outer pipe passes through the corresponding air guide outlet of the air guide cover and is located in the corresponding air guide duct, so that the mixed air flow enters the corresponding air outlet pipe; Each of the air outlet pipes is configured to be controllably movable along the front-to-back direction between a position protruding from the front side of the corresponding air outlet and a position retracted to the corresponding air outlet; The air inlet end of the first inner tube is located in the outer tube near the front end of the outer tube, the air outlet end of the first inner tube protrudes from the front side of the corresponding air outlet, and a first spacing space is formed between the inner peripheral wall of the outer tube and the outer peripheral wall of the first inner tube to facilitate the passage of the mixed airflow; Each of the air outlet pipes also includes a second inner pipe, which extends gradually from back to front in the corresponding first inner pipe, and a second spacing space is formed between the outer peripheral wall of the second inner pipe and the inner peripheral wall of the corresponding first inner pipe to facilitate the passage of the mixed airflow.

2. The air conditioner indoor unit according to claim 1, wherein Each of the air guide covers has an air guide duct connected to the fan air outlet of the corresponding single-suction centrifugal fan, the air guide duct is formed with an air guide inlet connected to the fan air outlet of the corresponding single-suction centrifugal fan, the front side of the air guide duct is formed with an air guide outlet opposite to the corresponding air outlet, and the rear side of the air guide duct is formed with an air guide inlet opposite to the corresponding air inlet.

3. The air conditioner indoor unit according to claim 1, wherein When the air outlet pipe is retracted to a position in the corresponding air outlet, the outer peripheral wall of the air outlet end of the first inner pipe abuts against the inner peripheral wall of the corresponding air outlet to close the first interval space, so that the mixed airflow is blown out to the front side from the second interval space and the second inner pipe respectively; When the air outlet pipe is located at a position protruding from the front side of the corresponding air outlet, the air outlet end of the first inner tube protrudes from the front side of the corresponding air outlet to expose the first partition space, so that the mixed airflow is blown toward the front side from the first partition space, the second partition space and the second inner tube respectively.

4. The air conditioning indoor unit according to claim 3, wherein The inner peripheral wall of the outer tube includes a rear wall section and a front wall section which are connected in sequence from the air inlet end to the air outlet end of the outer tube, and the air inlet end of the first inner tube is located in the space formed by the front wall section to form the first spacing space between the front wall section and the outer peripheral wall of the first inner tube; The rear wall section is a hollow truncated cone that gradually expands forward from the air inlet end of the outer tube, and the front wall section is a hollow truncated cone that gradually expands from the position connected to the rear wall section to the air outlet end of the outer tube; and The taper angle of the rear wall section is greater than the taper angle of the front wall section.

5. The air conditioning indoor unit according to claim 4, wherein The first inner tube is in the shape of a hollow truncated cone with uniform wall thickness and gradually expanding from its air inlet end to its air outlet end, and the cone angle of the first inner tube is greater than the cone angle of the front wall section.

6. The air conditioning indoor unit according to claim 4, wherein The outer circumferential wall of the second inner tube is a truncated cone that gradually expands from the back to the front, the inner circumferential wall of the second inner tube is a truncated cone that gradually expands from the air inlet end to the air outlet end of the second inner tube, and the cone angle of the inner circumferential wall of the second inner tube is greater than the cone angle of the outer circumferential wall of the second inner tube, and the cone angle of the outer circumferential wall of the second inner tube is equal to the cone angle of the front wall section.

7. The air conditioner indoor unit according to claim 1, further comprising: Two heat exchangers correspond to the two air inlet areas one by one and are respectively located inside the corresponding air inlet areas in the shell to perform heat exchange with the airflow entering the shell through the corresponding air inlet areas to form heat exchange wind.

8. The air conditioner indoor unit according to claim 1, wherein The housing comprises a rear shell with an open front side and a front panel located at the front side of the rear shell and forming a receiving space with the rear shell; The upper air outlet and the lower air outlet are formed on the front surface of the front panel, the upper air inlet and the lower air inlet are formed on the rear surface of the rear shell, and the two air inlet areas are formed on both lateral sides of the rear shell.

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