Air conditioner indoor unit

Abstract

The present invention provides an air-conditioning indoor unit, comprising a shell body formed with an air inlet, and an air inlet frame arranged at the air inlet, the air inlet frame being configured to be controllably movable between a position embedded in a corresponding air inlet and a position protruding from the corresponding air inlet, when the air inlet frame moves to the position embedded in the corresponding air inlet, ambient air enters the shell body only through the outer surface of the air inlet frame, at least one end face and / or at least one side face of the air inlet frame is formed with an opening, when the air inlet frame moves to the position protruding from the corresponding air inlet, the opening of the air inlet frame is exposed, thereby increasing the air intake volume.

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] The existing wall-mounted air conditioner indoor unit generally uses a cross-flow fan and a bent heat exchanger to supply air to an air outlet. The air supply range is limited, the air supply mode is fixed and inflexible, and it is difficult to meet the comfort and diversity needs of users. 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] a housing having at least one air inlet formed thereon;

[0007] At least one air inlet frame, the at least one air inlet frame corresponds to the at least one air inlet port, and the air inlet frame is configured to be controllably movable between a position embedded in the corresponding air inlet port and a position protruding from the corresponding air inlet port;

[0008] When the air inlet frame moves to a position where it is embedded in the corresponding air inlet, ambient air enters the housing only through the outer surface of the air inlet frame;

[0009] At least one end surface and / or at least one side surface of the air inlet frame is formed with an opening. When the air inlet frame moves to a position protruding from the corresponding air inlet, the opening of the air inlet frame is exposed, thereby increasing the air intake volume.

[0010] Optionally, the projection of the housing on the vertical plane carrying the air conditioner indoor unit is circular;

[0011] There are two air inlets and two air inlet frames. The two air inlets are formed on two lateral sides of the shell, are relatively distributed, and are arc-shaped.

[0012] Optionally, the air inlet frame is in an arc shape that matches the corresponding air inlet.

[0013] Optionally, the air conditioner indoor unit further includes:

[0014] At least one driving unit, at least one driving unit corresponds to at least one air inlet frame one by one, and the driving unit is configured to drive the corresponding air inlet frame to move between a position embedded in the corresponding air inlet and a position protruding from the corresponding air inlet.

[0015] Optionally, each air inlet includes an upper arc-shaped air inlet section and a lower arc-shaped air inlet section connected to the upper arc-shaped air inlet section, and the upper arc-shaped air inlet section and the lower arc-shaped air inlet section are symmetrical with respect to a transverse center line of the shell.

[0016] Optionally, the ratio of the distance between the upper end and the lower end of the projection of each air inlet on the vertical plane to the diameter of the shell is 0.7-0.8:1.

[0017] Optionally, the shell is further formed with two air outlets, one of which is located at the upper front part of the shell, recorded as the upper air outlet, and the other air outlet is located at the lower front part of the shell, recorded as the lower air outlet;

[0018] Two air supply fans are arranged in the storage space inside the shell, one of which is configured to force part of the air flow to flow from the air inlet to the upper part of the storage space so that the part of the air flow is blown out from the upper air outlet, and the other fan is configured to force part of the air flow to flow from the air inlet to the lower part of the storage space so that the part of the air flow is blown out from the lower air outlet.

[0019] Optionally, the air conditioner indoor unit further includes:

[0020] Two air outlet ducts extending forward and backward, one of which is located above the other air outlet duct, the upper air outlet duct corresponds to the upper air outlet and communicates with the fan outlet of the air supply fan that causes part of the air flow to flow toward the upper part of the accommodation space; the lower air outlet duct corresponds to the lower air outlet and communicates with the fan outlet of the air supply fan that causes part of the air flow to flow toward the lower part of the accommodation space;

[0021] 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 into the corresponding air outlet;

[0022] Each air outlet pipe includes 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 first inner pipe is located in the outer pipe near the front end, and a first spacing space is formed between the inner peripheral wall of the outer pipe and the outer peripheral wall of the first inner pipe;

[0023] 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 interval space, so that the airflow is blown out from the first inner pipe only toward the front side;

[0024] 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 interval space, so that part of the air flow is blown out from the first interval space to the front side, and part of the air flow is blown out from the first inner tube to the front side.

[0025] 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 airflow to pass through.

[0026] 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;

[0027] 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 toward the air outlet end of the outer tube; and

[0028] The taper angle of the rear wall section is greater than the taper angle of the front wall section.

[0029] 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;

[0030] The outer peripheral wall of the second inner tube is a truncated cone that gradually expands from the back to the front, and the inner peripheral wall of the second inner tube is a truncated cone that gradually expands from the air inlet end of the second inner tube to the air outlet end, and the cone angle of the inner peripheral wall of the second inner tube is greater than the cone angle of the outer peripheral wall of the second inner tube; and the cone angle of the outer peripheral wall of the second inner tube is equal to the cone angle of the front wall section.

[0031] In the indoor unit of the air conditioner of the present invention, an air inlet frame is provided at the air inlet, and the air inlet frame can move between a position embedded in the corresponding air inlet and a position protruding from the corresponding air inlet. When the air inlet frame is at the position embedded in the corresponding air inlet, ambient air enters the shell only through the outer surface of the air inlet frame, and when the air inlet frame protrudes from the position of the corresponding air inlet, the end face and / or side openings of the air inlet frame can be exposed, thereby increasing the air intake volume.

[0032] Furthermore, the air-conditioning indoor unit of the present invention has an upper air outlet formed on the upper front side of the shell and a lower air outlet formed on the lower front side of the shell. The upper air outlet and the lower air outlet complement each other to avoid the visual abruptness brought by one air outlet, so that the overall appearance of the indoor unit is more harmonious and beautiful, meeting the user's higher aesthetic needs; in addition, the air-conditioning indoor unit has two air supply fans. Compared with the traditional air-conditioning indoor unit with one air supply fan, two relatively small air supply fans are used, 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-conditioning indoor unit; furthermore, the two air supply fans can be independently controlled to operate, which is convenient for controlling the opening of different air supply fans according to different operating modes of the air-conditioning indoor unit, thereby improving the cooling and heating experience.

[0033] Furthermore, in the air-conditioning indoor unit of the present invention, the two air outlets each correspond to an air outlet duct that can be moved forward and backward in a controllable manner. Through the specially structured air outlet duct and the forward and backward movement of the air outlet duct, the air outlet range, air outlet distance, air outlet uniformity and air supply efficiency of the two air outlets of the indoor unit can be adjusted respectively, thereby enhancing the air supply effect of the indoor unit and improving the user's comfort experience.

[0034] 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

[0035] 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:

[0036] Figure 1 is a schematic diagram of the appearance structure of an air conditioner indoor unit according to an embodiment of the present invention;

[0037] Figure 2 It is a schematic structural diagram of the combination of a rear shell, an air inlet frame and an electric spiral lifting rod of an air conditioner indoor unit according to an embodiment of the present invention, wherein the air inlet frame is embedded in the air inlet;

[0038] Figure 3 It is a schematic structural diagram of the combination of a rear shell, an air inlet frame and an electric spiral lifting rod of an air conditioner indoor unit according to an embodiment of the present invention, wherein the air inlet frame protrudes from the air inlet;

[0039] Figure 4 is an exploded schematic diagram of an air conditioner indoor unit according to an embodiment of the present invention;

[0040] Figure 5 is a schematic structural diagram of an air guide cover of an air conditioner indoor unit according to an embodiment of the present invention;

[0041] Figure 6 is an exploded schematic diagram of an air conditioner indoor unit according to another embodiment of the present invention;

[0042] Figure 7 is a schematic structural diagram of an air outlet duct of an indoor unit of an air conditioner according to one embodiment of the present invention in one direction; and

[0043] Figure 8 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

[0044] Refer to the following Figures 1 to 8The air conditioner indoor unit 10 of 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 operate in a specific direction, and therefore cannot be understood as limiting the present invention.

[0045] Figure 1 is a schematic structural diagram of an air-conditioning indoor unit 10 according to an embodiment of the present invention.

[0046] like Figure 1 As shown, and combined with the following Figure 4 and Figure 6 The air-conditioning indoor unit 10 of this embodiment is a wall-mounted air-conditioning indoor unit, including a shell and at least one air inlet frame 19, at least one air inlet 11a is formed on the shell, at least one air inlet frame 19 corresponds to at least one air inlet 11a one by one, and each air inlet frame 19 is configured to be controllably movable between a position embedded in a corresponding air inlet 11a and a position protruding from the corresponding air inlet 11a.

[0047] At least one end surface and / or at least one side surface of the air inlet frame 19 is formed with an opening. The air inlet frame 19 is configured to be controllably movable between a position embedded in the corresponding air inlet 11a and a position protruding from the corresponding air inlet 11a. When the air inlet frame 19 moves to a position embedded in the corresponding air inlet 11a, ambient air enters the housing only through the outer surface of the air inlet frame 19. When the air inlet frame 19 moves to a position protruding from the corresponding air inlet 11a, the opening of the air inlet frame 19 is exposed, so that part of the air passes through the outer surface of the air inlet frame 19 (such as Figure 3 The air enters the housing through the left surface of the air inlet frame 19 on the horizontal left side and the right surface of the air inlet frame 10 on the horizontal right side, and part of the air enters the housing through the exposed opening of the air inlet frame 19, thereby increasing the air intake amount of the indoor unit 10. The air inlet frame 19 can be a grille-type air inlet frame.

[0048] In some embodiments, there are two air inlets 11a, which are formed on both sides of the housing in the horizontal direction. Accordingly, there are two air inlet frames 19, and the shape of the air inlet frames 19 matches the shape of the corresponding air inlet 11a. Figure 2 The direction indicated.

[0049] In some embodiments, the projection of the housing on the vertical plane carrying the air conditioner indoor unit 10 is circular, so that the entire air conditioner indoor unit 10 has a unique and beautiful appearance, which is completely different from the existing long wall-mounted air conditioner indoor unit 10, and meets the personalized aesthetic needs of users. Accordingly, the air inlet 11a formed on the housing is arc-shaped, and the air inlet frame 19 matching the air inlet 11a is arc-shaped.

[0050] In some embodiments, the ratio of the distance between the upper and lower ends of the projection of each air inlet 11a on the vertical plane to the diameter of the shell can be 0.7-0.8:1, ensuring the size of each air inlet 11a to ensure the air intake volume of the indoor unit 10.

[0051] In some embodiments, the two air inlets 11 a are symmetrically distributed relative to the vertical center line of the shell, further improving the aesthetics of the indoor unit 10 .

[0052] In some embodiments, each air inlet 11a includes an upper arc-shaped air inlet section and a lower arc-shaped air inlet section connected to the upper arc-shaped air inlet section, and the upper arc-shaped air inlet section and the lower arc-shaped air inlet section are symmetrical with respect to the transverse center line of the shell.

[0053] Figure 2 1 is a schematic structural diagram of a rear housing, an air inlet frame 19 and an electric spiral lifting rod 101 of an air conditioner indoor unit 10 according to an embodiment of the present invention, wherein the air inlet frame 19 is embedded in the air inlet 11a. Figure 3 1 is a schematic structural diagram of a rear shell, an air inlet frame 19 and an electric spiral lifting rod 101 of an air conditioner indoor unit 10 according to an embodiment of the present invention, wherein the air inlet frame 19 protrudes from the air inlet 11a.

[0054] In some embodiments, the air conditioning indoor unit 10 also includes at least one driving unit, which corresponds one-to-one to the at least one air inlet frame 19 mentioned above, and the driving unit is configured to drive the corresponding air inlet frame 19 to move between a position embedded in the corresponding air inlet 11a and a position protruding from the corresponding air inlet 11a.

[0055] In some embodiments, the driving unit may be an electric spiral lifting rod 101, and a driving unit includes an electric spiral lifting rod 101, which is connected to a position approximately at the center of the inner side of the corresponding air inlet frame 19 and is configured to be controllably movable laterally to cause the corresponding air inlet frame 19 to move laterally between a position embedded in the corresponding air inlet 11a and a position protruding from the corresponding air inlet 11a.

[0056] In some embodiments, Figure 2 and Figure 3As shown, a driving unit includes two electric spiral lifting rods 101, and the two electric spiral lifting rods 101 are respectively connected to the inner sides of the two ends of the corresponding air inlet frame 19 in the circumferential direction. It can also be understood that one electric spiral lifting rod 101 is connected to the inner side of the upper end of the corresponding air inlet frame 19, and the other electric spiral lifting rod 101 is connected to the inner side of the lower end of the corresponding air inlet frame 19. The two electric spiral lifting rods 101 in the driving unit are configured to be able to move laterally in a controlled manner to cause the corresponding air inlet frame 19 to move laterally between a position embedded in the corresponding air inlet 11a and a position protruding from the corresponding air inlet 11a.

[0057] The air inlet frame 19 may partially protrude from the corresponding air inlet port 11a, exposing a portion of the opening of at least one end face and / or at least one side face of the air inlet frame 19, thereby increasing the air inlet area; the air inlet frame 19 may also completely protrude from the corresponding air inlet port 11a, thereby forming a gap between the air inlet frame 19 and the air inlet port 11a, thereby further increasing the air inlet area.

[0058] In the solution that a driving unit includes two electric screw lifting rods 101, in some alternative embodiments, such as Figure 2 and Figure 3 As shown, one electric spiral lifting rod 101 in the driving unit is configured to move obliquely upward, and the other electric spiral lifting rod 101 is configured to move obliquely downward. The air inlet frame 19 moves between the position embedded in the corresponding air inlet 11a and the position protruding from the corresponding air inlet 11a under the drive of the two electric spiral lifting rods 101. In this embodiment, the distance that the air inlet frame 19 moves between the position embedded in the corresponding air inlet 11a and the position protruding from the corresponding air inlet 11a can be approximately 10 mm. Since the distance that the air inlet frame 19 moves is small, while ensuring that the air inlet frame 19 partially protrudes from the corresponding air inlet 11a, the air inlet frame 19 will not be deformed during the movement due to the driving of the two electric spiral lifting rods 101 with different driving directions.

[0059] In some embodiments, the air conditioning indoor unit 10 may further include a dust filter (not shown), which is disposed on the inner side of the air inlet frame 19 to filter dust in the air entering the shell to ensure the cleanliness of the air entering the shell.

[0060] Figure 4 is an exploded schematic diagram of an air conditioner indoor unit 10 according to an embodiment of the present invention, Figure 5 is a schematic structural diagram of a shroud 15 of an air conditioner indoor unit 10 according to an embodiment of the present invention. Figure 6 2 is an exploded schematic diagram of an air-conditioning indoor unit 10 according to another embodiment of the present invention.

[0061] like Figure 1 , Figure 4 and Figure 6 As shown, the shell is also formed with two air outlets, one of which is formed at the upper front side of the shell, denoted as the upper air outlet 12a, and the other is formed at the lower front side of the shell, denoted as the lower air outlet 12b. The air conditioner indoor unit 10 also includes two air supply fans, one of the two air supply fans is configured to cause part of the air flow to flow from the air inlet to the upper part of the storage space so that the part of the air flow is blown out from the upper air outlet 12a, and the other air supply fan is configured to cause part of the air flow to flow from the air inlet to the lower part of the storage space so that the part of the air flow is blown out from the lower air outlet 12b. Wherein, the front-to-back direction is as shown in FIG. Figure 1 The direction indicated.

[0062] In the embodiment where the housing is circular, the projections of the upper air outlet 12a and the lower air outlet 12b on the vertical plane supporting the air conditioning indoor unit 10 are both circular, which further improves the aesthetic appearance of the air conditioning indoor unit 10.

[0063] In the existing scheme, the air conditioner indoor unit 10 with similar appearance has an air outlet and an air supply fan. In order to meet the air supply demand of the air conditioner indoor unit 10, the air supply 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 only one air outlet is provided 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 air conditioner indoor unit 10, and the air supply of the air conditioner indoor unit 10 is realized by adopting two air supply fans. The sizes of the two air supply fans are relatively small, and the accommodation space in the shell can be more reasonably allocated, which can 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.

[0064] In addition, since the indoor unit 10 has two independent air supply fans and two independent air outlets, the states of the two air supply fans 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 air supply fan that causes part of the air flow to flow to the upper part of the storage space in the shell can be controlled to open. Under the action of the air supply fan, the cold air flows to the upper part and blows forward through the upper air outlet 12a, while the other air supply fan (the air supply fan that causes part of the air flow to flow to the lower part of the storage space in the shell) remains closed, and the cold air is only blown forward from the upper air outlet 12a, 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.

[0065] In heating mode, the air supply fan that causes part of the air flow to flow to the lower part of the storage space in the shell can be controlled to be turned on, while the other air supply fan (the air supply fan that causes part of the air flow to flow to the upper part of the storage space in the shell) is turned off, and the hot air is only blown forward from the lower air outlet 12b, which lowers the hot air outlet position, and prevents the hot air from 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 lower space in the room are uniform, improving the heating effect and the user's heating experience.

[0066] In some embodiments, the housing includes a rear shell 11 with an open front side and a front panel 12 located at the front side of the rear shell 11 and forming a receiving space with the rear shell 11. Accordingly, the projections of the rear shell 11 and the front panel 12 on the vertical plane carrying the indoor unit 10 are both circular. The rear shell 11 is formed with the aforementioned two air inlets 11a, and the upper air outlet 12a and the lower air outlet 12b are both formed on the front panel 12, the upper air outlet 12a is formed on the upper part of the front panel 12, and the lower air outlet 12b is formed on the lower part of the front panel 12.

[0067] In some embodiments, 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 distributing the upper air outlet 12a and the lower air outlet 12b, it meets the aesthetic standards of the public and further increases the aesthetics and coordination of the indoor unit 10.

[0068] 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.

[0069] The air conditioner indoor unit 10 of this embodiment further includes two heat exchangers 13, which correspond to the two air inlets 11a one by one and are respectively arranged inside the corresponding air inlets 11a in the shell to perform heat exchange with the ambient air entering through the corresponding air inlets 11a.

[0070] like Figure 4 and Figure 6 As shown, the projection of each heat exchanger 13 in the vertical plane carrying the indoor unit 10 is arc-shaped to match the corresponding air inlet 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 provides sufficient remaining space for the arrangement of the air supply fan and other components in the shell.

[0071] In some embodiments, the air conditioner indoor unit 10 further includes two water receiving pans 16, which 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.

[0072] In some embodiments, the water receiving tray 16 is in the shape of a boat that extends long and narrow from front to back, which can accommodate more condensed water and prevent the condensed water from overflowing. When the indoor unit 10 is improperly suspended and tilted, the condensed water will not overflow from the water receiving port because it does not have time to be discharged.

[0073] In some embodiments, both air supply fans of the indoor unit 10 are centrifugal fans, which may be single-suction centrifugal fans 14 or double-suction centrifugal fans 105. The rotating shaft of the centrifugal fan should extend in the horizontal direction, and the vertical plane supporting the air-conditioning indoor unit 10 mentioned above should refer to the plane on which the air-conditioning indoor unit 10 is vertically suspended on the vertical wall. If the air-conditioning indoor unit 10 itself is used as a reference, the projection of the housing of the air-conditioning indoor unit 10 on the plane parallel to the rotating shaft of the centrifugal fan should be circular.

[0074] In some embodiments, the lateral distance between the heat exchanger and the fan inlet of the corresponding centrifugal fan may range from 40 to 70 mm, for example, the lateral distance is 57 mm.

[0075] See also Figure 4 For the solution in which both air supply fans are single-suction centrifugal fans 14, it is preferred that an air inlet 11a is formed on both lateral sides of the shell, the rotating shafts of the two single-suction centrifugal fans 14 extend laterally, and the two single-suction centrifugal fans 14 are located on both sides of the lateral direction of the vertical center line of the shell, the fan air inlet 14a of one single-suction centrifugal fan 14 faces the air inlet 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 11a located on the same side as the single-suction centrifugal fan 14, that is, the fan air inlets 14a of the two single-suction centrifugal fans 14 are opposite to each other and face the corresponding air inlets 11a, so as to prompt the ambient air around the indoor unit 10 to enter the shell through the corresponding air inlet 11a.

[0076] The fan outlet 14b of one of the single-suction centrifugal fans 14 is upward, and the fan outlet 14b of the other single-suction centrifugal fan 14 is downward. The single-suction centrifugal fan 14 with the fan outlet 14b upward is configured to cause part of the air flow to enter the shell through the air inlet 11a corresponding to the single-suction centrifugal fan 14, exchange heat with the corresponding heat exchanger 13, and flow toward the upper part of the accommodating space, so that the part of the air flow is blown out from the upper air outlet 12a; the single-suction centrifugal fan 14 with the fan outlet 14b downward is configured to cause part of the air flow to enter the shell through the air inlet 11a corresponding to the single-suction centrifugal fan 14, exchange heat with the corresponding heat exchanger 13, and flow toward the lower part of the accommodating space, so that the part of the air flow is blown out from the lower air outlet 12b, so that air flow is blown out from both the upper air outlet 12a and the lower air outlet 12b.

[0077] In some embodiments, in order to guide the airflow to the upper air outlet 12a and the lower air outlet 12b respectively, the air conditioner indoor unit 10 also includes two air guide covers 15 corresponding to the two single-suction centrifugal fans 14, and the air guide covers 15 are configured to guide the airflow of the fan outlet 14b of the corresponding single-suction centrifugal fan 14 to the corresponding air outlet. That is to say, the air guide cover 15 corresponding to the single-suction centrifugal fan 14 with the fan outlet 14b upward guides the airflow of the fan outlet 14b of the single-suction centrifugal fan 14 to the upper air outlet 12a, so that the airflow is blown forward from the upper air outlet 12a; the air guide cover 15 corresponding to the single-suction centrifugal fan 14 with the fan outlet 14b downward guides the airflow of the fan outlet 14b of the single-suction centrifugal fan 14 to the lower air outlet 12b, so that the airflow is blown forward from the lower air outlet 12b.

[0078] In some embodiments, see Figure 4 , and combined with Figure 5 As shown, each air deflector 15 has an air collecting chamber connected to the fan outlet 14b of the corresponding single-suction centrifugal fan 14 and a guide air duct running through the air collecting chamber, and a guide air outlet 15b 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 to guide the airflow to the corresponding air outlet.

[0079] Specifically, in this embodiment, the air guide cover 15 includes a horizontal wall 151 extending forward and backward, a curved wall 152, a front side wall 153, a rear side wall (not marked), and an arc-shaped partition wall 154. The horizontal wall 151 is formed with an air guide inlet 15a connected to the fan outlet 14b of the corresponding single-suction centrifugal fan 14, and the curved wall 152 is formed with a front side wall 153, a rear side wall (not marked), and an arc-shaped partition wall 154. One end in the circumferential direction is connected to one end in the lateral direction of the horizontal wall 151, and the other end in the circumferential direction of the curved wall 152 is connected to the other end in the lateral direction of the horizontal wall 151, thereby defining a cavity with the horizontal wall 151; the front side wall 153 connects the front side of the horizontal wall 151 and the front side of the curved wall 152, and closes the front side of the air deflector 15 to close the front side of the cavity, and the rear side wall connects the rear side of the horizontal wall 151 and the rear side of the curved wall 152, and closes the rear side of the air deflector 15 to close the rear side of the cavity; an arc-shaped partition wall 154 is formed in the cavity, dividing the cavity into the aforementioned air collecting cavity and the air guide duct, and the arc-shaped partition wall 154 is formed with an opening connecting the air collecting cavity and the air guide duct, and the front side wall 153 is formed with the aforementioned air guide outlet 15b opposite to the air guide duct. The air guide hood 15 thus formed has an air collecting chamber, and the air flow flowing out of the fan outlet 14b of the single-suction centrifugal fan 14 enters the air collecting chamber of the air guide hood 15 and is mixed in the air collecting chamber, thereby ensuring the uniformity of the air output; and, the air guide hood 15 of the aforementioned special shape is used in conjunction with the single-suction centrifugal fan 14 to achieve smooth transition of air supply, which can reduce air flow loss and turbulence, thereby improving air supply efficiency and reducing noise.

[0080] In some embodiments, the guide air duct defined by the arc-shaped partition wall 154 and the curved wall 152 is preferably a cylindrical structure, that is, the portion of the curved wall 152 opposite to the arc-shaped partition wall 154 is an arc shape that forms a circular arc with the arc-shaped partition wall 154, so that the guide air duct defined by the cylindrical structure matches the corresponding circular air outlet shape, and the airflow of the guide air duct is directly blown forward through the corresponding air outlet, thereby improving the smoothness of the airflow delivery, reducing airflow loss, and further improving the air supply efficiency.

[0081] It can be understood that the single-suction centrifugal fan 14 generally includes a volute 141 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 141 has a fan air outlet 14b connected to the accommodating chamber, and the impeller can rotate around a transverse axis relative to the volute 141.

[0082] In some embodiments, in order to reduce the overall structural size of the entire indoor unit 10, two efficient centrifugal fans 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, it is determined that two single-suction backward centrifugal fans are used as the two air supply fans of this embodiment, and the single-suction backward centrifugal fans meet the following conditions:

[0083] 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.

[0084] 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 airflow through the curved blade path of the centrifugal 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 airflow speed difference. In addition, by limiting the installation outlet angle βb2, the specific speed ns, the circumferential speed u2 and the 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.

[0085] 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.

[0086] In some embodiments, Figure 6 As shown, the two air supply fans are both axial flow fans 107, one of which is configured to force part of the air flow to flow from the air inlet 11a to the upper air outlet 12a, so that part of the air flow is blown out from the upper air outlet 12a, and the other axial flow fan 107 is configured to force part of the air flow to flow from the air inlet 11a to the lower air outlet 12b, so that the part of the air flow is blown out from the lower air outlet 12b, thereby achieving air flow blowing out from both the upper air outlet 12a and the lower air outlet 12b.

[0087] One of the axial flow fans 107 is located above the other axial flow fan 107. The upper axial flow fan 107 is located behind the upper air outlet 12a and is configured to force part of the air flow to flow from the air inlet 11a to the upper air outlet 12a. The lower axial flow fan 107 is located behind the lower air outlet 12b and is configured to force part of the air flow to flow from the air inlet 11a to the lower air outlet 12b.

[0088] In a preferred embodiment, there are two air inlets 11a, and the two air inlets 11a are respectively formed on both lateral sides of the shell. The axial flow fan 107 is configured to rotate around an axis extending front to back, and each axial flow fan 107 is spaced from the rear wall of the shell. The axial flow fan 107 located above causes part of the airflow entering the shell from the two air inlets 11a to flow forward to the upper air outlet 12a, and the axial flow fan 107 located below causes part of the airflow entering the shell from the two air inlets 11a to flow forward to the lower air outlet 12b, thereby increasing the air intake volume of the indoor unit 10 and improving the air supply efficiency.

[0089] Figure 7 is a schematic structural diagram of an air outlet duct 18 of an air conditioner indoor unit 10 in one direction according to an embodiment of the present invention. Figure 8 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.

[0090] In some embodiments, Figure 1 , Figure 4 and Figure 6 As shown, combined with Figure 7 and Figure 8The air conditioner indoor unit 10 also includes two air outlet ducts 18 extending forward and backward, one of which is located above the other air outlet duct 18. The upper air outlet duct 18 corresponds to the upper air outlet 12a and is communicated with the fan outlet of the air supply fan that causes part of the air flow to flow to the upper part of the accommodating space; the lower air outlet duct 18 corresponds to the lower air outlet 12b and is communicated with the fan outlet of the air supply fan that causes part of the air flow to flow to the lower part of the accommodating space.

[0091] The 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 air outlet of the corresponding indoor unit 10 and a position retracted into the air outlet of the corresponding indoor unit 10. That is to say, the air outlet duct 18 located at the top 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 air outlet duct 18 located at the bottom 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.

[0092] Specifically, Figure 7 and Figure 8 As shown, each air outlet duct 18 includes an outer tube 181 extending forward and backward and a first inner tube 182 connected to the inner circumferential wall of the outer tube 181 and extending gradually from back to front to protrude from the front side of the outer tube 181. The air inlet end of the first inner tube 182 is located inside the outer tube 181 near the front end of the outer tube 181, and a first spacing space 103 is formed between the inner circumferential wall of the outer tube 181 and the outer circumferential wall of the first inner tube 182. That is to say, the first inner tube 182 is a trumpet-shaped structure from back to front, and the outer tube 181 and the first inner tube 182 form a meandering tube. Under normal conditions, part of the heat exchange airflow can be blown forward through the internal space of the first inner tube 182, and part of the heat exchange airflow can be blown forward through the first spacing space 103.

[0093] 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 interval space 103, so that the heat exchange airflow is only blown out from the first inner tube 182 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 the heat exchange airflow flowing to the upper part of the storage space in the shell is blown forward only from the first inner tube 182 of the air outlet duct 18 located at the top; 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 the heat exchange airflow flowing to the lower part of the storage space in the shell is blown forward only from the first inner tube 182 of the air outlet duct 18 located at the bottom.

[0094] 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 back to 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 spacing space 103) is exposed, so that the heat exchange airflow in the first inner tube 182 and the first spacing space 103 is blown forward.

[0095] Compared with the traditional air outlet, in this embodiment, by designing each air outlet pipe 18 as a zigzag structure as described above, the air outlet range can be increased to achieve a wide-area air supply effect; and the air flow is diffused around the front side of the air outlet corresponding to the indoor unit 10, and the surrounding air is sucked forward to improve the uniformity of air supply, making the wind softer and more natural, and the user feels cool but not cold when blowing on the body, thereby improving the user's comfort. In addition, by controlling the air outlet pipe 18 to move between the position retracted to the corresponding air outlet and the position protruding from the front side of the corresponding air outlet, when the air outlet pipe 18 protrudes from the front side of the corresponding air outlet, air flows forward from both the first inner tube 182 and the first interval space 103, while expanding the air outlet range, the air supply distance is lengthened, and the air supply uniformity and comfort are further improved; in addition, since the air flow is divided into two parts, one part of the air flow is directly blown forward from the first inner tube 182, and the other part of the air flow is directly blown forward from the first interval space 103, which effectively reduces the eddy current loss and improves the air supply efficiency.

[0096] In some embodiments, Figure 7 and Figure 8 As shown, each air outlet duct 18 further includes a second inner tube 183, which gradually extends from the back to the front in the corresponding first inner tube 182, and a second partition space 104 is formed between the outer peripheral wall of the second inner tube 183 and the inner peripheral wall of the corresponding first inner tube 182. When the air outlet duct 18 is retracted 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, closing the first partition space 103, so that part of the heat exchange air flow is blown out from the first inner tube 182 to the front side, and part of the heat exchange air flow is blown out from the second partition space 104 to the front side. When the air outlet duct 18 is located at 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, revealing the first partition space 103, so that heat exchange air flows in the first partition space 103, the second partition space 104 and the second inner tube 183 are blown forward.

[0097] By adding a second inner tube 183 of the aforementioned shape, a second spacing space 104 is formed between the first inner tube 182 and the second inner tube 183, which further expands the air outlet range and allows the airflow to be blown forward in a more dispersed manner, so that the blown airflow is mixed with the surrounding indoor environment airflow, further improving the air supply uniformity and comfort.

[0098] The first inner tube 182 passes through the bracket ( Figure 8 ) 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 8 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.

[0099] The movement of the two air outlet ducts 18 and the state of the two air supply fans 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 air supply fan that causes part of the air flow to flow to the upper part of the storage space in the shell can be controlled to open; while the air outlet duct 18 corresponding to the lower air outlet 12b can be kept in the lower air outlet 12b and not move forward. Correspondingly, the corresponding air supply fan (that is, the air supply fan that causes part of the air flow to flow to the lower part of the storage space in the shell) remains closed, and the 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.

[0100] 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 air supply fan (that is, the air supply fan that causes part of the air flow 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 remain in the upper air outlet 12a and not move forward. Correspondingly, the corresponding air supply fan (that is, the air supply fan that causes part of the air flow to flow to the upper part of the storage space in the shell) remains closed, and the 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 located 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 user's heating comfort experience is further enhanced.

[0101] In this embodiment, see again Figure 4 and Figure 6 The air conditioner indoor unit 10 further includes an electric control board 17, which is disposed between the two air supply fans. The electric control board 17 is configured to control the operation of the two air supply fans. In some embodiments, the electric control board 17 also controls the movement of the two air outlet pipes 18. The electric control board 17 is arranged in the space between the two air supply fans, 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.

[0102] In some embodiments, Figure 8 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 that 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 that 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, the rear wall section 181a is a trumpet-shaped that gradually expands from the back to the front, and the front wall section 181b is a trumpet-shaped that 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 8 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.

[0103] 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, thereby reducing eddy current losses. 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).

[0104] In some embodiments, Figure 8 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.

[0105] In some embodiments, Figure 8 As 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.

[0106] By limiting the inner wall of the outer tube 181 to the above structure, and limiting the shapes of the first inner tube 182 and the second inner tube 183 to the above structure, the first spacing space 103 (the space between the outer tube 181 and the first inner tube 182), the second spacing space 104 (the space between the first inner tube 182 and the second inner tube 183) and the space within the second inner tube 183 defined thereby can divert the airflow, expand the air outlet range, further reduce eddy losses, and improve air supply efficiency; and make the air outlet softer and more uniform.

[0107] In some embodiments, the cone angle 2c of the front wall section 181b satisfies: 0°<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.

[0108] See again Figure 4 , Figures 6 to 8 The air conditioner indoor unit 10 of this embodiment further includes two drive units, the two drive units correspond to the two air outlet pipes 18 one by one, and each drive unit may include a rack 102 ( Figure 8 ), 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.

[0109] The length of the tooth segment of the rack 102 that meshes with the gear can 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 can be moved forward so that the part of the first inner tube 182 located on the front side of the outer tube 181 is completely extended 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.

[0110] In the solution where both air supply fans are single suction centrifugal fans 14, see Figure 4 In one embodiment, the air inlet ends of the two air outlet pipes 18 (that is, the air inlet ends of the outer pipes 181) pass through the corresponding guide air outlets 15b of the guide cover 15 and are located in the guide air duct, and 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 air duct 15. It can be understood that the size of the air outlet pipe 18, the size of the guide air duct, and the size of the opening connecting the air collecting cavity and the guide air duct formed by the arc-shaped partition wall 154 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 air collecting cavity.

[0111] In some implementations of this embodiment, the rack 102 may be formed on the outer peripheral wall of the corresponding air outlet pipe 18, extending from front to rear. Figure 4 and Figure 5 The two air guide ducts of the two air guide covers 15 are formed with front-to-rear extending notches 15c adapted to the corresponding racks 102 on the air outlet pipe 18. The racks 102 pass through the notches 15c so that the teeth of the racks 102 are exposed on the outside of the air guide duct of the air guide cover 15 to mesh with the corresponding gears and seal the air guide duct. The length of the racks 102 is sufficient to extend along the corresponding notches 15c to the rear side of the air guide duct to ensure that when the air outlet pipe 18 moves forward, the notches 15c of the air guide duct are always covered by the racks 102 to ensure the sealing of the air guide duct.

[0112] In the solution where both air supply fans are axial flow fans 107, see Figure 6 It can be understood that the axial flow fan 107 generally includes a fan housing and a wind wheel (not marked) disposed in a housing space in the fan housing. The air inlet ends of the two air outlet ducts 18 (i.e., the air inlet ends of the outer tube 181) can be sleeved on the outer peripheral wall of the fan housing of the corresponding axial flow fan 107 and slide in close contact with the fan housing. During the forward and backward movement of the air outlet duct 18, the rear section of the air outlet duct 18 is always sleeved on the outer peripheral wall of the fan housing of the corresponding axial flow fan 107. For example, during the forward or backward movement of the air outlet duct 18, the rear sections of the rear wall section 181a and the front wall section 181b of the air outlet duct 18 are always in contact with the outer peripheral wall of the fan housing of the corresponding axial flow fan 107 to ensure the stability of the air outlet duct 18. In this embodiment, the gear and motor of each drive unit are located at the rear end of the corresponding axial flow fan 107 in the accommodating space of the shell, and the rack 102 is formed on the outer peripheral wall of the outer tube 181 of the corresponding air outlet duct 18, extending from front to rear to the rear end of the axial flow fan 107 to engage with the gear to realize the forward and backward movement of the air outlet duct 18.

[0113] 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 housing having at least one air inlet formed thereon; At least one air inlet frame, the at least one air inlet frame corresponding to the at least one air inlet port, the air inlet frame being configured to be controllably movable between a position embedded in the corresponding air inlet port and a position protruding from the corresponding air inlet port; When the air inlet frame moves to a position where it is embedded in the corresponding air inlet, ambient air enters the housing only through the outer surface of the air inlet frame; At least one end surface and / or at least one side surface of the air inlet frame is formed with an opening, and when the air inlet frame moves to a position protruding from the corresponding air inlet, the opening of the air inlet frame is exposed, thereby increasing the air intake volume; The projection of the housing on the vertical plane carrying the air conditioner indoor unit is circular; The shell is also formed with two air outlets, one of which is located at the upper front part of the shell, and is recorded as the upper air outlet, and the other air outlet is located at the lower front part of the shell, and is recorded as the lower air outlet; The projections of the upper air outlet and the lower air outlet on the vertical plane carrying the air conditioner indoor unit are both circular; Two air supply fans are arranged in the accommodation space inside the shell, wherein one of the air supply fans is configured to cause part of the air flow to flow from the air inlet to the upper part of the accommodation space so that the part of the air flow is blown out from the upper air outlet, and the other air supply fan is configured to cause part of the air flow to flow from the air inlet to the lower part of the accommodation space so that the part of the air flow is blown out from the lower air outlet; Two air outlet pipes extending forward and backward, one of the air outlet pipes is located above the other air outlet pipe, the air outlet pipe located above corresponds to the upper air outlet and is communicated with the fan outlet of the air supply fan that causes part of the air flow to flow toward the upper part of the storage space; the air outlet pipe located below corresponds to the lower air outlet and is communicated with the fan outlet of the air supply fan that causes part of the air flow to flow toward the lower part of the storage space; 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 into the corresponding air outlet; 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 first inner pipe is located in the outer pipe near the front end of the outer pipe, and a first spacing space is formed between the inner peripheral wall of the outer pipe and the outer peripheral wall of the first inner pipe; When the air outlet pipe is retracted 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 interval space, so that the airflow is only blown out from the first inner pipe to the front side; 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 interval space, so that part of the airflow is blown out from the first interval space to the front side, and part of the airflow is blown out from the first inner pipe to the front side; 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 airflow to pass through.

2. The air conditioner indoor unit according to claim 1, wherein There are two air inlets and two air inlet frames, and the two air inlets are respectively formed on two lateral sides of the shell, distributed relatively to each other, and the air inlets are arc-shaped.

3. The air conditioning indoor unit according to claim 2, wherein The air inlet frame is in an arc shape matching the corresponding air inlet.

4. The air conditioner indoor unit according to claim 1, further comprising: At least one driving unit, the at least one driving unit corresponds one-to-one with the at least one air inlet frame, and the driving unit is configured to drive the corresponding air inlet frame to move between a position embedded in the corresponding air inlet and a position protruding from the corresponding air inlet.

5. The air conditioning indoor unit according to claim 2, wherein Each of the air inlets comprises an upper arc-shaped air inlet section and a lower arc-shaped air inlet section connected to the upper arc-shaped air inlet section, and the upper arc-shaped air inlet section and the lower arc-shaped air inlet section are symmetrical with respect to a transverse center line of the shell.

6. The air conditioning indoor unit according to claim 1, wherein The ratio of the distance between the upper end and the lower end of the projection of each air inlet on the vertical plane to the diameter of the shell is 0.7-0.8:

1.

7. The air conditioning indoor unit according to claim 1, 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 toward 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.

8. The air conditioning indoor unit according to claim 7, 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; 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 of the second inner tube to the air outlet end, 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.

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