Indoor unit of air conditioner

Abstract

The utility model discloses an indoor unit of an air conditioner. The air conditioner indoor unit comprises a machine shell, a heat exchanger and a heat exchanger, the first axial flow fan and the second axial flow fan are coaxially arranged, the air outlet side of the first axial flow fan is consistent with the air outlet side of the second axial flow fan, and the rotating direction of the first axial flow fan is opposite to the rotating direction of the second axial flow fan; and the heat exchanger is arranged in the machine shell. The air conditioner indoor unit has the advantages that the air outlet rotational flow intensity is low, the comfort degree of a user is improved, and the refrigerating and heating effects are good.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technology field, specifically, air conditioner indoor unit. BACKGROUND

[0002] The air conditioning device in the related art adopts a cross-flow fan to circulate air. Since the airflow flow direction is forced to turn in the impeller of the cross-flow fan, the dynamic pressure loss is large, which reduces the efficiency of the cross-flow fan. The axial flow fan has the advantages of low pressure and high air volume, and can greatly improve the air supply volume. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the related art is solved to some extent. To this end, the utility model provides an air conditioner indoor unit.

[0004] The air conditioner indoor unit of the utility model includes: a casing, the casing has an air inlet and an air outlet; a first axial flow fan and a second axial flow fan, the first axial flow fan and the second axial flow fan are coaxially arranged, the air outlet side of the first axial flow fan is consistent with the air outlet side of the second axial flow fan, and the rotation direction of the first axial flow fan is opposite to the rotation direction of the second axial flow fan; and a heat exchanger, the heat exchanger is arranged in the casing.

[0005] The air conditioner indoor unit of the utility model has the advantages of low air outlet rotational flow intensity, improved user comfort and good refrigeration and heating effect.

[0006] Optionally, the air conditioner indoor unit further includes a flow guide cover, and the flow guide cover covers the first axial flow fan and the second axial flow fan.

[0007] Optionally, the first axial flow fan and the second axial flow fan are both arranged obliquely, the air outlet side of the first axial flow fan is arranged forward and upward, and the air outlet side of the second axial flow fan is arranged forward and upward.

[0008] Optionally, the angle between the rotation axis of the first axial flow fan and the horizontal plane is greater than or equal to 30 degrees and less than or equal to 45 degrees, and the angle between the rotation axis of the second axial flow fan and the horizontal plane is greater than or equal to 30 degrees and less than or equal to 45 degrees; and / or the diameter of the first axial flow fan is equal to the diameter of the second axial flow fan.

[0009] Optionally, the heat exchanger is arranged obliquely between the air outlet and the air outlet side of each of the first axial flow fan and the second axial flow fan, and the angle between the heat exchanger and the horizontal plane is greater than or equal to 45 degrees and less than or equal to 60 degrees.

[0010] Optionally, the heat exchanger is obliquely arranged between the air outlet and an air outlet side of each of the first and second axial flow fans, the air conditioner indoor unit further comprises a water pan arranged directly below a lower end of the heat exchanger, a distance between the water pan and the lower end of the heat exchanger in a height direction of the cabinet is L1, the lower end of the heat exchanger and an upper end of the heat exchanger are oppositely arranged in a length direction of the heat exchanger, a length of the heat exchanger is L2, and L2 / L1 is less than or equal to 13.

[0011] Optionally, the air inlet is arranged on at least one of a bottom plate and a rear plate of the cabinet; and / or the air outlet is arranged on a front plate of the cabinet.

[0012] Optionally, the air outlet comprises an upper air outlet and a lower air outlet, the air conditioner indoor unit further comprises: an upper air guide plate rotatably arranged at a lower edge of the upper air outlet of the front plate between a first closed position and a first air guide position, a rotation axis of the upper air guide plate extending along a length direction of the cabinet; and a lower air guide plate rotatably arranged at a lower edge of the lower air outlet of the front plate between a second closed position and a second air guide position, a rotation axis of the lower air guide plate extending along the length direction of the cabinet.

[0013] Optionally, an included angle between the upper air guide plate in the first air guide position and a vertically upward direction is greater than 0 degrees and less than or equal to 150 degrees, and an included angle between the lower air guide plate in the second air guide position and the vertically upward direction is greater than 0 degrees and less than or equal to 150 degrees.

[0014] Optionally, the first axial flow fan comprises a first shaft, a first motor and a first blade, the first motor is connected with the first shaft, and the first blade is arranged on the first shaft; the second axial flow fan comprises a second shaft, a second motor and a second blade, the second motor is connected with the second shaft, and the second blade is arranged on the second shaft, wherein an axial direction of the first shaft is consistent with an axial direction of the second shaft, each of the first motor and the second motor is away from an air outlet side of the first axial flow fan in the axial direction of the first shaft relative to the first blade, and each of the first motor and the second motor is away from an air outlet side of the second axial flow fan in the axial direction of the first shaft relative to the second blade.

[0015] Optionally, the second shaft has a first through hole extending along the axial direction of the first shaft, the second motor has a second through hole extending along the axial direction of the first shaft, and the first shaft passes through the first through hole and the second through hole, wherein the second motor and the second blade are located between the first motor and the first blade in the axial direction of the first shaft. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of an air conditioner indoor unit according to an embodiment of the present application;

[0017] Figure 2 is a structural schematic diagram of an air conditioner indoor unit according to an embodiment of the present application;

[0018] Figure 3 is a partial structural schematic diagram of an air conditioner indoor unit according to an embodiment of the present application;

[0019] Figure 4 is an exploded view of an air conditioner indoor unit according to an embodiment of the present application. DETAILED DESCRIPTION

[0020] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0021] An air conditioner indoor unit 100 according to an embodiment of the present application is described below with reference to the drawings. As shown in Figures 1-4 the air conditioner indoor unit 100 according to the embodiment of the present application includes a casing 1, a first axial flow fan 2, a second axial flow fan 3, and a heat exchanger 4.

[0022] The casing 1 has an air inlet 11 and an air outlet, and the heat exchanger 4 is arranged in the casing 1. The first axial flow fan 2 and the second axial flow fan 3 are coaxially arranged, the air outlet side of the first axial flow fan 2 is consistent with the air outlet side of the second axial flow fan 3, and the rotation direction of the first axial flow fan 2 is opposite to the rotation direction of the second axial flow fan 3.

[0023] The air conditioner indoor unit 100 according to the embodiment of the present application can offset the rotational flow generated by the first axial flow fan 2 and the rotational flow generated by the second axial flow fan 3 by coaxially arranging the first axial flow fan 2 and the second axial flow fan 3 and making the rotation directions opposite, so as to reduce the rotational flow intensity of the air outlet of the air conditioner indoor unit 100, and further improve the comfort of the air outlet of the air conditioner indoor unit 100.

[0024] Moreover, the axial flow fan has the advantages of low pressure, high air volume, and high efficiency. By arranging the first axial flow fan 2 and the second axial flow fan 3 with consistent air outlet sides, the air supply volume of the air conditioner indoor unit 100 can be greatly improved, the energy consumption of the air conditioner indoor unit 100 can be reduced, the cold air and the hot air blown by the air conditioner indoor unit 100 can more fully and more quickly cover the entire room, so as to improve the refrigeration and heating effect of the air conditioner indoor unit 100.

[0025] Therefore, the air conditioner indoor unit 100 has the advantages of low air outlet rotating flow intensity, improved user comfort, good refrigeration and heating effect, etc.

[0026] As shown in Figures 1-4 , the casing 1 includes a front panel 13, a bottom panel 14, a rear panel 15, and a top panel 16. The front panel 13 and the rear panel 15 are oppositely arranged in the width direction of the casing 1, and the bottom panel 14 and the top panel 16 are oppositely arranged in the height direction of the casing 1.

[0027] When the air conditioner indoor unit 100 is in the installed state, the height direction of the casing 1 can be consistent with the up-down direction, and the width direction of the casing 1 can be consistent with the front-rear direction. The up-down direction is indicated by an arrow A in Figure 1 , and the front-rear direction is indicated by an arrow B in Figure 1 .

[0028] As shown in Figure 4 , the air inlet 11 is arranged on at least one of the bottom panel 14 and the rear panel 15 of the casing 1. The air outlet is arranged on the front panel 13 of the casing 1.

[0029] As shown in Figure 1 , Figure 2 and Figure 4 , the air outlet includes an upper air outlet 121 and a lower air outlet 122, and the upper air outlet 121 is located above the lower air outlet 122. By arranging multiple air outlets (the upper air outlet 121 and the lower air outlet 122), the air outlet area can be increased to increase the air outlet volume, so that the cold air and hot air blown by the air conditioner indoor unit 100 can more fully and quickly cover the entire room, thereby improving the refrigeration and heating effect. Especially when the length of the casing 1 is small, by arranging the upper air outlet 121 and the lower air outlet 122, the air outlet area can be effectively increased to effectively increase the air outlet volume.

[0030] Optionally, the upper air outlet 121 extends along the length direction of the casing 1, and the lower air outlet 122 extends along the length direction of the casing 1. In this way, the area of the upper air outlet 121 and the lower air outlet 122 can be further increased, so that the cold air and hot air blown by the air conditioner indoor unit 100 can more fully and quickly cover the entire room, thereby further improving the refrigeration and heating effect.

[0031] As shown in Figure 1 , Figure 2 and Figure 4As shown, the air conditioner indoor unit 100 further comprises an upper air deflector 71 and a lower air deflector 72. The upper air deflector 71 is rotatably arranged at the lower edge of the upper air outlet 121 of the front panel 13 between a first closed position and a first air deflection position, and the rotation axis of the upper air deflector 71 extends along the length direction of the casing 1. The lower air deflector 72 is rotatably arranged at the lower edge of the lower air outlet 122 of the front panel 13 between a second closed position and a second air deflection position, and the rotation axis of the lower air deflector 72 extends along the length direction of the casing 1.

[0032] In other words, the upper air deflector 71 and the lower air deflector 72 are mounted to the front panel 13. When the upper air deflector 71 is in the first closed position, the lower end of the upper air deflector 71 is rotatably connected to the front panel 13, and the lower end of the upper air deflector 71 is located at the lower edge of the upper air outlet 121. When the lower air deflector 72 is in the second closed position, the lower end of the lower air deflector 72 is rotatably connected to the front panel 13, and the lower end of the lower air deflector 72 is located at the lower edge of the lower air outlet 122.

[0033] By arranging the upper air deflector 71 and the lower air deflector 72, the cold air or hot air blown out of the upper air outlet 121 and the lower air outlet 122 can be deflected, so as to further improve the cooling and heating effects of the air conditioner indoor unit 100.

[0034] Optionally, the angle β3 between the upper air deflector 71 in the first air deflection position and the vertically upward direction is greater than 0 degrees and less than or equal to 150 degrees, and the angle β4 between the lower air deflector 72 in the second air deflection position and the vertically upward direction is greater than 0 degrees and less than or equal to 150 degrees.

[0035] Therefore, when cooling, not only the cold air is prevented from directly blowing on the user, so as to further improve the comfort of the user, but also the cold air can more fully and quickly cover the entire room, so as to further improve the cooling effect. When heating, the hot air can flow downward to form a "carpet wind", so that the hot air can more fully and quickly cover the entire room, so as to further improve the heating effect.

[0036] For example, when cooling, the angle β3 between the upper air deflector 71 in the first air deflection position and the vertically upward direction is greater than 0 degrees and less than or equal to 90 degrees, and the angle β4 between the lower air deflector 72 in the second air deflection position and the vertically upward direction is greater than 0 degrees and less than or equal to 90 degrees. Therefore, the cold air is further prevented from flowing directly downward, so as to further prevent the cold air from directly blowing on the user.

[0037] When heating is performed, the upper air deflector 71 in the first air deflection position has an angle β3 with the vertical upward direction greater than 90 degrees and less than or equal to 150 degrees, and the lower air deflector 72 in the second air deflection position has an angle β4 with the vertical upward direction greater than 90 degrees and less than or equal to 150 degrees. Thus, it is more conducive to downward flow of the hot air to form "carpet wind", so that the hot air more fully and more quickly covers the entire room, so as to further improve the heating effect.

[0038] As shown in Figure 2 The air conditioner indoor unit 100 further comprises a flow guide cover 5, and the flow guide cover 5 covers the first axial flow fan 2 and the second axial flow fan 3. That is, the flow guide cover 5 has a flow guide cavity 51, and the first axial flow fan 2 and the second axial flow fan 3 are arranged in the flow guide cavity 51. By arranging the flow guide cover 5, the airflow can be gathered to further improve the working efficiency and air supply of the first axial flow fan 2 and the second axial flow fan 3. Thus, the cold air and hot air blown by the air conditioner indoor unit 100 can more fully and more quickly cover the entire room, further improving the cooling and heating effect of the air conditioner indoor unit 100.

[0039] The air outlet side of the first axial flow fan 2 is consistent with the air outlet side of the second axial flow fan 3. That is, the air outlet direction of the first axial flow fan 2 is consistent with the air outlet direction of the second axial flow fan 3, that is, the flow direction of the airflow output by the first axial flow fan 2 is consistent with the flow direction of the airflow output by the second axial flow fan 3.

[0040] As shown in Figures 1-4 The first axial flow fan 2 and the second axial flow fan 3 are both arranged obliquely, and the air outlet side of the first axial flow fan 2 is arranged forward and upward, and the air outlet side of the second axial flow fan 3 is arranged forward and upward. Thus, the first axial flow fan 2 can be better opposite to the upper air outlet 121 and the lower air outlet 122, and the second axial flow fan 3 can be better opposite to the upper air outlet 121 and the lower air outlet 122, thereby reducing airflow energy loss, so that the cold air and hot air blown by the air conditioner indoor unit 100 can more fully and more quickly cover the entire room, further improving the cooling and heating effect of the air conditioner indoor unit 100.

[0041] Correspondingly, the flow guide cover 5 is arranged obliquely. Thus, the airflow can be more effectively gathered, thereby further improving the working efficiency and air supply of the first axial flow fan 2 and the second axial flow fan 3.

[0042] Alternatively, the angle β1 between the rotating axis of the first axial flow fan 2 and the horizontal plane is greater than or equal to 30 degrees and less than or equal to 45 degrees. The angle between the rotating axis of the second axial flow fan 3 and the horizontal plane is greater than or equal to 30 degrees and less than or equal to 45 degrees. Thus, the airflow loss can be effectively reduced, and the air outlet efficiency can be effectively improved.

[0043] When the angle between the rotating axis of the first axial flow fan 2 (the second axial flow fan 3) and the horizontal plane is less than 30 degrees, the airflow has too large a deflection angle, which increases the airflow loss. When the angle between the rotating axis of the first axial flow fan 2 (the second axial flow fan 3) and the horizontal plane is greater than 45 degrees, the airflow output by the first axial flow fan 2 (the second axial flow fan 3) has too large a deflection angle when flowing to the lower air outlet 122, which reduces the air outlet efficiency.

[0044] Further optionally, the angle β1 between the rotating axis of the first axial flow fan 2 and the horizontal plane is greater than or equal to 36 degrees and less than or equal to 39 degrees. The angle between the rotating axis of the second axial flow fan 3 and the horizontal plane is greater than or equal to 36 degrees and less than or equal to 39 degrees. In this way, the airflow loss can be more effectively reduced, and the air outlet efficiency can be more effectively improved.

[0045] For example, the angle between the first axial flow fan 2 and the horizontal plane, the angle between the second axial flow fan 3 and the horizontal plane, and the angle between the flow guide cover 4 and the horizontal plane are equal to each other. For example, the rotating axis of the first axial flow fan 2, the rotating axis of the second axial flow fan 3, and the center line of the flow guide cover 4 coincide with each other.

[0046] The first axial flow fan 2 and the second axial flow fan 3 are coaxially arranged (coaxially arranged), and the rotation direction of the first axial flow fan 2 is opposite to the rotation direction of the second axial flow fan 3. Optionally, the diameter of the first axial flow fan 2 is equal to the diameter of the second axial flow fan 3. In this way, the rotational flow generated by the first axial flow fan 2 and the rotational flow generated by the second axial flow fan 3 can more fully offset each other, thereby further reducing the rotational flow intensity of the air outlet of the air conditioner indoor unit 100, and further improving the comfort of the air outlet of the air conditioner indoor unit 100.

[0047] As shown in Figure 1 , Figure 2 and Figure 4 , the heat exchanger 4 is obliquely arranged between the air outlet side of the first axial flow fan 2 and the air outlet of the cabinet 1, and the heat exchanger 4 is obliquely arranged between the air outlet side of the second axial flow fan 3 and the air outlet of the cabinet 1. In this way, the airflow output by the first axial flow fan 2 and the second axial flow fan 3 can directly blow on the heat exchanger 4, thereby effectively improving the heat exchange efficiency and the heat exchange amount of the heat exchanger 4. Moreover, the heat exchange area of the heat exchanger 4 can be increased in a limited space, thereby further improving the heat exchange efficiency and the heat exchange amount of the heat exchanger 4. In addition, the airflow output by the first axial flow fan 2 and the second axial flow fan 3 can be rectified by the heat exchanger 4, so as to reduce the noise of the airflow, and further reduce the noise of the air conditioner indoor unit 100.

[0048] For example, the heat exchanger 4 is arranged in parallel with the first axial flow fan 2, and the heat exchanger 4 is arranged in parallel with the second axial flow fan 3. In this way, the heat exchange efficiency and the heat exchange amount of the heat exchanger 4 can be further improved.

[0049] Optionally, the angle β2 between the heat exchanger 4 and the horizontal plane is greater than or equal to 45 degrees and less than or equal to 60 degrees. In this way, not only can the pressure loss of the airflow be effectively reduced, but also the heat exchange area of the heat exchanger 4 can be increased, so as to improve the heat exchange efficiency and heat exchange capacity of the heat exchanger 4.

[0050] When the angle β2 between the heat exchanger 4 and the horizontal plane is less than 45 degrees, the airflow flowing from the heat exchanger 4 to the lower air outlet 122 will have a too large deflection angle, which will increase the pressure loss of the airflow. When the angle β2 between the heat exchanger 4 and the horizontal plane is greater than 60 degrees, the heat exchange area of the heat exchanger 4 will be reduced, which will in turn reduce the heat exchange efficiency and heat exchange capacity of the heat exchanger 4.

[0051] Further optionally, the angle β2 between the heat exchanger 4 and the horizontal plane is greater than or equal to 51 degrees and less than or equal to 54 degrees. In this way, not only can the pressure loss of the airflow be more effectively reduced, but also the heat exchange area of the heat exchanger 4 can be further increased, so as to further improve the heat exchange efficiency and heat exchange capacity of the heat exchanger 4.

[0052] As shown in Figures 1-4 The air conditioner indoor unit 100 further comprises a water collecting tray 6, which is arranged directly below the lower end portion 41 of the heat exchanger 4. In this way, the water collecting tray 6 can be used to collect the condensed water falling from the heat exchanger 4, so as to avoid the condensed water flowing out of the air conditioner indoor unit 100 and corroding the ceiling, wall, etc. adjacent to the air conditioner indoor unit 100.

[0053] The distance between the water collecting tray 6 and the lower end portion 41 of the heat exchanger 4 in the height direction of the casing 1 is L1. The lower end portion 41 of the heat exchanger 4 and the upper end portion 42 of the heat exchanger 4 are oppositely arranged in the length direction of the heat exchanger 4, and the length of the heat exchanger 4 is L2, i.e. the distance between the lower end portion 41 of the heat exchanger 4 and the upper end portion 42 of the heat exchanger 4 in the length direction of the heat exchanger 4 is L2. The length direction of the heat exchanger 4 is indicated by the arrow C in Figure 1 .

[0054] Optionally, L2 / L1 is less than or equal to 13. In this way, the noise generated by the air conditioner indoor unit 100 during operation can be effectively reduced. When L2 / L1 is greater than 13, the distance between the water collecting tray 6 and the lower end portion 41 of the heat exchanger 4 in the height direction of the casing 1 will be too small, and the airflow will easily produce whistling at the gap between the water collecting tray 6 and the lower end portion 41 of the heat exchanger 4, which will in turn cause the air conditioner indoor unit 100 to generate noise during operation.

[0055] Further optionally, L2 / L1 is less than or equal to 9. In this way, the noise generated by the air conditioner indoor unit 100 during operation can be more effectively reduced without increasing the height of the air conditioner indoor unit 100 (the casing 1).

[0056] As shown in Figures 1-4As shown, the first axial flow fan 2 includes a first shaft 21, a first motor 22, and a first blade 23. The first motor 22 is connected to the first shaft 21, and the first blade 23 is disposed on the first shaft 21. The second axial flow fan 3 includes a second shaft 31, a second motor 32, and a second blade 33. The second motor 32 is connected to the second shaft 31, and the second blade 33 is disposed on the second shaft 31.

[0057] The axial direction of the first shaft 21 is aligned with the axial direction of the second shaft 31. The first motor 22 is located away from the outlet side of the first axial flow fan 2 relative to the first blade 23 along the axial direction of the first shaft 21 (second shaft 31). The second motor 32 is also located away from the outlet side of the first axial flow fan 2 relative to the first blade 23 along the axial direction of the first shaft 21 (second shaft 31). Similarly, the first motor 22 is located away from the outlet side of the second axial flow fan 3 relative to the second blade 33 along the axial direction of the first shaft 21 (second shaft 31).

[0058] This avoids the first motor 22 and the second motor 32 blocking the air (airflow) output by the first axial fan 2 and the second axial fan 3, thereby reducing the resistance to the air output by the first axial fan 2 and the second axial fan 3. This not only increases the air delivery distance of the indoor unit 100, but also allows the cold and hot air blown out by the indoor unit 100 to cover the entire room more fully and quickly, thereby further improving the cooling and heating effect.

[0059] like Figures 1-3 As shown, the second shaft 31 has a first through hole extending axially along the first shaft 21 (second shaft 31), and the second motor 32 has a second through hole extending axially along the first shaft 21 (second shaft 31). The first shaft 21 passes through the first through hole and the second through hole, that is, the first shaft 21 passes through the second motor 32 and the second shaft 31. The second motor 32 is located axially between the first motor 22 and the first blade 23 on the first shaft 21 (second shaft 31), and the second blade 33 is located axially between the first motor 22 and the first blade 23 on the first shaft 21 (second shaft 31).

[0060] In other words, the first motor 22, the second motor 32, the second blade 33, and the first blade 23 are arranged sequentially along the axial direction of the first shaft 21 (second shaft 31). In other words, the second axial flow fan 3 is located between the first motor 22 and the first blade 23 along the axial direction of the first shaft 21 (second shaft 31). This allows for a more rational and compact structure for the air conditioner indoor unit 100.

[0061] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0062] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0063] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0064] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0065] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled person in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0066] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: A housing having an air inlet and an air outlet; A first axial flow fan and a second axial flow fan are arranged coaxially, with the outlet side of the first axial flow fan coinciding with the outlet side of the second axial flow fan, and the rotation direction of the first axial flow fan being opposite to that of the second axial flow fan; and A heat exchanger, which is disposed within the housing.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, It further includes a flow guide shroud, which covers the first axial flow fan and the second axial flow fan.

3. The indoor unit of the air conditioner according to claim 1, characterized in that, Both the first axial flow fan and the second axial flow fan are arranged at an angle, with the air outlet side of the first axial flow fan facing forward and upward, and the air outlet side of the second axial flow fan facing forward and upward.

4. The indoor unit of the air conditioner according to claim 3, characterized in that, The angle between the rotation axis of the first axial flow fan and the horizontal plane is greater than or equal to 30 degrees and less than or equal to 45 degrees; the angle between the rotation axis of the second axial flow fan and the horizontal plane is greater than or equal to 30 degrees and less than or equal to 45 degrees; and / or The diameter of the first axial flow fan is equal to the diameter of the second axial flow fan.

5. The indoor unit of the air conditioner according to claim 1, characterized in that, The heat exchanger is inclinedly disposed between the air outlet and the air outlet side of each of the first axial flow fan and the second axial flow fan, and the angle between the heat exchanger and the horizontal plane is greater than or equal to 45 degrees and less than or equal to 60 degrees.

6. The indoor unit of the air conditioner according to claim 1, characterized in that, The heat exchanger is inclinedly disposed between the air outlet and the air outlet side of each of the first axial flow fan and the second axial flow fan. The indoor unit of the air conditioner further includes a water collection tray, which is disposed directly below the lower end of the heat exchanger. The distance between the water collection tray and the lower end of the heat exchanger in the height direction of the casing is L1. The lower end and the upper end of the heat exchanger are disposed opposite each other in the length direction of the heat exchanger. The length of the heat exchanger is L2, and L2 / L1 is less than or equal to 13.

7. The indoor unit of the air conditioner according to claim 1, characterized in that, The air inlet is located in at least one of the bottom plate and the rear plate of the housing; and / or The air outlet is located on the front panel of the housing.

8. The indoor unit of the air conditioner according to claim 7, characterized in that, The air outlet includes an upper air outlet and a lower air outlet, and the indoor unit of the air conditioner further includes: An upper air guide plate, rotatably disposed at the lower edge of the upper air outlet on the front panel between a first closed position and a first air guiding position, wherein the rotation axis of the upper air guide plate extends along the length of the housing; and The lower air guide plate is rotatably disposed at the lower edge of the lower air outlet on the front panel between the second closed position and the second air guide position, and the rotation axis of the lower air guide plate extends along the length direction of the housing.

9. The indoor unit of the air conditioner according to claim 8, characterized in that, The angle between the upper air guide plate located at the first air guide position and the vertical upward direction is greater than 0 degrees and less than or equal to 150 degrees, and the angle between the lower air guide plate located at the second air guide position and the vertical upward direction is greater than 0 degrees and less than or equal to 150 degrees.

10. The indoor unit of the air conditioner according to claim 1, characterized in that, The first axial flow fan includes a first shaft, a first motor, and first blades. The first motor is connected to the first shaft, and the first blades are disposed on the first shaft. The second axial flow fan includes a second shaft, a second motor, and a second blade. The second motor is connected to the second shaft, and the second blade is disposed on the second shaft. The axial direction of the first shaft is consistent with the axial direction of the second shaft. Each of the first motor and the second motor is located away from the air outlet side of the first axial flow fan relative to the first blade in the axial direction of the first shaft.

11. The indoor unit of the air conditioner according to claim 10, characterized in that, The second shaft has a first through hole extending axially along the first shaft, and the second motor has a second through hole extending axially along the first shaft. The first shaft passes through the first through hole and the second through hole, wherein the second motor and the second blade are located axially between the first motor and the first blade on the first shaft.

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