Air conditioner indoor unit and air duct component thereof

Abstract

The utility model provides an air conditioner indoor unit and an air duct component thereof. The air duct component comprises an end plate and an electric heater which are fixedly arranged. The end plate forms the end face of one end of the air channel of the air conditioner indoor unit in the length direction. A mounting opening and a mounting column located on the periphery of the mounting opening are formed in the end plate. The electric heater is inserted into the mounting opening in the length direction of the air duct. The electric heater comprises a mounting cover plate, and the mounting cover plate covers the side, away from the air duct, of the mounting opening. The installation cover plate is provided with installation holes corresponding to the installation columns and limiting convex ribs located on the peripheries of the installation holes. The limiting convex rib is located on the side, close to the air duct, of the installation cover plate so that the outer side wall of the installation column can stop the inner side wall of the limiting convex rib in the direction perpendicular to the inserting direction of the electric heater. During installation, the installation holes are automatically aligned with the installation columns, and the assembling efficiency of the electric heater can be improved. And the electric heater can be prevented from shaking during transportation and use, and the purpose of preventing the electric heater from shaking and being damaged is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air processing equipment, in particular to an indoor unit of an air conditioner and an air duct component thereof. Background Art

[0002] The indoor unit of the air conditioner, taking the air conditioner cabinet as an example, usually installs an electric heater in the air duct for auxiliary heating. In the prior art, the electric heater is assembled on the end plate of the air duct through screw holes, screw columns and screws. Since the electric heater is a long strip structure, it is easy to shake left and right during assembly. Therefore, it is difficult to align the left and right screw holes with the screw columns of the lower fixing structure, and the assembly efficiency is low. There may even be a screw installation misalignment defect, that is, the screw is not installed on the screw column, so that the electric heater cannot be fixed securely, which leads to the electric heater being damaged due to severe shaking during the transportation of the air conditioner cabinet or during use. The electric heater is a high-voltage component. Once damaged, it is very easy to cause electric and fire hazards, posing a greater safety hazard. Utility Model Content

[0003] In view of the above problems, the present utility model is proposed to provide an air conditioner indoor unit and its air duct components that overcome the above problems or at least partially solve the above problems, aiming to solve the problems of low assembly efficiency and easy shaking and damage of electric heaters in the prior art.

[0004] Specifically, the utility model provides the following technical solutions:

[0005] An air duct component of an indoor unit of an air conditioner comprises a fixed end plate and an electric heater.

[0006] The end plate forms an end surface of one end of the air duct of the air conditioner indoor unit in the length direction. The end plate is formed with an installation opening and an installation column located at the periphery of the installation opening.

[0007] The electric heater is inserted into the installation opening along the length direction of the air duct. The electric heater comprises an installation cover plate, and the installation cover plate is arranged on a side of the installation opening away from the air duct.

[0008] The mounting cover is provided with a mounting hole corresponding to the mounting column and a limiting convex rib located at the periphery of the mounting hole. The limiting convex rib is located at a side of the mounting cover close to the air duct, so that the outer side wall of the mounting column blocks the inner side wall of the limiting convex rib in a direction perpendicular to the insertion direction of the electric heater.

[0009] Optionally, a side of the end plate away from the air duct protrudes outward to form a mounting groove, and an inner peripheral wall of the mounting groove forms the mounting opening.

[0010] Optionally, the top of the mounting groove is flush with the top of the mounting column.

[0011] Optionally, a chamfer is provided at the top edge of the inner peripheral wall of the mounting groove.

[0012] Optionally, the mounting post is fixedly connected to the first side wall of the mounting groove.

[0013] Optionally, a threaded hole is provided in the mounting column, and an axis of the threaded hole is coplanar with an outer side wall of the first side wall.

[0014] Optionally, the limiting rib is in the shape of an arc coaxial with the mounting hole, and is located on a side of the mounting hole away from the first side wall.

[0015] Optionally, the mounting opening is rectangular as a whole, and there are two mounting posts which are relatively arranged at two ends of the mounting opening in the length direction.

[0016] The two mounting holes and the two limiting ribs are each arranged in pairs corresponding to the two mounting posts.

[0017] Optionally, an opening groove is provided on one long side of the rectangle, and the opening of the opening groove faces into the installation opening.

[0018] A limiting protrusion matching the opening groove is arranged on one side of the installation cover plate close to the air duct.

[0019] Optionally, the opening groove is located at the center of the rectangle in the length direction.

[0020] Optionally, the mounting post is located at the center of the rectangle in the width direction.

[0021] Optionally, the air duct component further includes an air duct frame, and the end plate is integrally formed at one end of the air duct frame.

[0022] The air duct frame and the end plate define two air ducts arranged in parallel and at intervals. The end plate is provided with two installation openings at intervals, and each installation opening is connected to one of the air ducts.

[0023] There are two electric heaters, which are inserted into the two installation openings in a one-to-one correspondence.

[0024] On the other hand, the utility model also provides an air conditioner indoor unit, which includes the above-mentioned air duct component and cross-flow wind wheels corresponding to the air ducts one by one, and each of the cross-flow wind wheels is rotatably arranged in the corresponding air duct along its length direction.

[0025] The air duct component of the indoor unit of the air conditioner of the utility model is provided with a limiting convex rib on the periphery of the mounting hole of the mounting cover plate of the electric heater. When the electric heater is inserted into the mounting opening along the length direction of the air duct, the inner side wall of the limiting convex rib and the outer side wall of the mounting column are guided and matched so that the mounting hole is automatically aligned with the mounting column, thereby improving the assembly efficiency of the electric heater. Moreover, the screws will not be misaligned, thereby improving the assembly quality of the electric heater.

[0026] On the other hand, after the installation is completed, the outer wall of the mounting column forms a limit on the inner wall of the limiting rib, preventing the electric heater from moving in a direction perpendicular to its insertion direction, thereby preventing the electric heater from shaking during transportation and use, thereby achieving the purpose of avoiding damage to the electric heater due to shaking.

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

[0028] 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:

[0029] Figure 1 is a schematic structural diagram of an air duct component according to an embodiment of the utility model;

[0030] Figure 2 is a schematic top view of an air duct component according to an embodiment of the utility model, in which an electric heater is hidden;

[0031] Figure 3 is a schematic partial structural diagram of an end plate of an air duct component according to an embodiment of the utility model;

[0032] Figure 4 is a schematic structural diagram of an electric heater of an air duct component according to an embodiment of the utility model;

[0033] Figure 5 yes Figure 4 A schematic enlarged view of the middle A;

[0034] Figure 6 It is a schematic partial structural diagram of an electric heater of an air duct component according to an embodiment of the utility model.

[0035] List of reference numerals:

[0036] 100, end plate; 110, mounting opening; 120, mounting column; 130, mounting groove; 131, first side wall; 140, threaded hole; 150, open groove; 160, chamfer;

[0037] 200, electric heater; 210, mounting cover; 220, mounting hole; 230, limiting rib; 240, limiting convex block;

[0038] 300. Air duct frame. DETAILED DESCRIPTION

[0039] Refer to the following Figures 1 to 6 To describe the air-conditioning indoor unit and the air duct components thereof of the embodiment of the utility model. In the description of this embodiment, it should be understood that the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more 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 clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0040] Unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix", "couple" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. A person skilled in the art should be able to understand the specific meanings of the above terms in the present utility model according to the specific circumstances.

[0041] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. That is, in the description of this embodiment, the first feature being "above", "above", and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below", or "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0043] Figure 1 1 is a schematic structural diagram of an air duct component according to an embodiment of the utility model, in order to more clearly show the structure of each component of the air duct component in this embodiment, Figure 1 The electric heater on the right side of the picture is in the process of being assembled and has not yet been fully assembled. Figure 1 As shown, and refer to Figure 2-6 The embodiment of the utility model provides an air duct component of an indoor unit of an air conditioner, and the air duct component includes a fixed end plate 100 and an electric heater 200 .

[0044] The end plate 100 forms an end surface of one end of the air duct of the indoor unit of the air conditioner in the longitudinal direction. The end plate 100 is formed with an installation opening 110 and an installation column 120 located at the outer periphery of the installation opening 110 .

[0045] The electric heater 200 is inserted into the installation opening 110 along the length direction of the air duct. The electric heater 200 includes an installation cover plate 210, which is arranged on a side of the installation opening 110 away from the air duct.

[0046] The mounting cover plate 210 is provided with a mounting hole 220 corresponding to the mounting column 120, and a limiting rib 230 located at the periphery of the mounting hole 220. The limiting rib 230 is located at a side of the mounting cover plate 210 close to the air duct, so that the outer side wall of the mounting column 120 blocks the inner side wall of the limiting rib 230 in a direction perpendicular to the insertion direction of the electric heater 200.

[0047] The electric heater 200 is inserted into the air duct through the mounting opening 110 on the end plate 100. The electric heater 200 is usually provided with a high-power electric heating wire or electric belt. When the air conditioner is heating or dehumidifying, the electric heating wire or electric belt is energized to release heat to heat the airflow in the air duct.

[0048] The electric heater 200 may be in the shape of a long strip. When the indoor unit of the air conditioner is a vertical cabinet, the length direction of the air duct may be a vertical direction, and the electric heater 200 is installed in the vertical direction. At this time, the end plate 100 may be located on the upper side of the air duct, and the bottom surface of the end plate 100 forms the upper end surface of the air duct. The end plate 100 may also be located on the lower side of the air duct, and the top surface of the end plate 100 forms the lower end surface of the air duct.

[0049] When the indoor unit of the air conditioner is a wall-mounted unit, the length direction of the air duct can be horizontal, and the electric heater 200 is installed in the horizontal direction. In this case, the end plate 100 can be located on the left side of the air duct, and the bottom surface of the end plate 100 forms the left end surface of the air duct. The end plate 100 can also be located on the right side of the air duct, and the top surface of the end plate 100 forms the right end surface of the air duct.

[0050] In this embodiment, the indoor unit of the air conditioner is a vertical cabinet unit, and the end plate 100 is located on the upper side of the air duct.

[0051] The mounting opening 110 is horizontally arranged and vertically penetrates the end plate 100. The mounting cover plate 210 is located at the upper part of the electric heater 200, the mounting hole 220 vertically penetrates the mounting cover plate 210, and the limiting rib 230 is located at the outer periphery of the bottom surface of the mounting hole 220 and protrudes downward.

[0052] When installing the electric heater 200, the electric heater 200 can be inserted into the mounting opening 110 from the upper side of the mounting opening 110. During the vertical downward insertion of the electric heater 200, the distance between the mounting cover plate 210 and the top of the mounting opening 110 gradually decreases until the inner wall of the limiting rib 230 contacts the outer wall of the mounting column 120, and the outer wall of the mounting column 120 limits and guides the inner wall of the limiting rib 230, so that the threaded holes in the mounting hole 220 and the mounting column 120 can be aligned. The electric heater 200 continues to move downward until the bottom surface of the mounting hole 220 contacts the top surface of the mounting column 120, at which time, the inner wall of the limiting rib 230 fits the outer wall of the mounting column 120. Finally, fasteners are connected to the mounting hole 220 and the mounting column 120.

[0053] It should be understood that the inner side wall of the limiting rib 230 and the outer side wall of the mounting column 120 can be fitted or gap-fitted. The limiting rib 230 can be columnar, wall-shaped, etc., as long as it is located at the periphery of the bottom surface of the mounting hole 220 and its inner side wall is matched with the outer side wall of the mounting column 120.

[0054] When assembling the electric heater 200, the air duct component of the indoor unit of the air conditioner of the utility model automatically aligns the mounting hole 220 with the mounting column 120 through the guiding cooperation between the inner side wall of the limiting rib 230 and the outer side wall of the mounting column 120, thereby improving the assembly efficiency of the electric heater 200. Furthermore, the screws will not be misaligned, thereby improving the assembly quality of the electric heater 200.

[0055] On the other hand, after the electric heater 200 is installed, the outer wall of the mounting column 120 limits the inner wall of the limiting rib 230, thereby preventing the electric heater 200 from moving in a direction perpendicular to its insertion direction, thereby preventing the electric heater 200 from shaking during transportation and use, thereby achieving the purpose of preventing the electric heater 200 from shaking and being damaged.

[0056] In some embodiments of the air duct component of the present invention, Figure 2 As shown, one side of the end plate 100 away from the air duct protrudes outward to form a mounting groove 130 , and the inner peripheral wall of the mounting groove 130 forms a mounting opening 110 .

[0057] In this embodiment, the mounting groove 130 can be integrally formed on the upper surface of the end plate 100. The mounting groove 130 can improve the structural strength of the mounting opening 110 and provide a firm support for the electric heater 200. On the other hand, the upper end of the mounting opening 110 is located above the upper surface of the end plate 100, so as to prevent water on the end plate 100 from flowing into the mounting opening 110 and then into the electric heater 200, causing the electric heater 200 to short-circuit and be damaged.

[0058] In some embodiments of the air duct component of the present invention, Figure 3 As shown, the top end of the mounting groove 130 is flush with the top end of the mounting post 120 .

[0059] In this way, the bottom surface of the mounting hole 220 can be flush with the bottom surface of the mounting cover plate 210, that is, the hole is directly punched on the mounting cover plate 210, which is convenient for mold making. On the other hand, when the mounting hole 220 is installed on the mounting column 120, the mounting cover plate 210 covers the top end of the mounting groove 130 and closes the mounting opening 110, which can prevent water, impurities, etc. from entering the mounting opening 110.

[0060] In some embodiments of the air duct component of the present invention, Figure 3 As shown, a chamfer 160 is provided at the top edge of the inner peripheral wall of the mounting groove 130 .

[0061] By providing a chamfer 160 at the top edge of the inner peripheral wall of the installation groove 130, it is convenient to insert the lower end of the electric heater 200 into the installation opening 110 during installation. During the downward insertion process of the electric heater 200, the chamfer 160 can also guide the electric heater 200.

[0062] Preferably, if Figure 6 As shown, the lower end of the mounting cover 210 is provided with a step corresponding to the chamfer 160, so that when the mounting cover 210 is covered on the mounting opening 110, the chamfer 160 limits and guides the step, prompting the mounting hole 220 to be aligned with the mounting column 120, which can further improve the installation efficiency.

[0063] In some embodiments of the air duct component of the present invention, Figure 2-3 As shown, the mounting post 120 is fixedly connected to the first side wall 131 of the mounting groove 130 .

[0064] In this embodiment, the mounting column 120 is formed in the first side wall 131 and can be integrally formed with the mounting groove 130. In this way, the first side wall 131 forms a rib plate for the mounting column 120, which can improve the strength of the mounting column 120. At the same time, the mounting column 120 has a larger cross-section, which can improve the strength of the first side wall 131. On the other hand, arranging the mounting column 120 in the first side wall 131 can also save materials and reduce manufacturing costs.

[0065] In some embodiments of the air duct component of the present invention, Figure 2-3 As shown, a threaded hole 140 is disposed in the mounting column 120 , and the axis of the threaded hole 140 is coplanar with the outer side wall of the first side wall 131 .

[0066] In this embodiment, the electric heater 200 is fixedly mounted on the mounting column 120 by screws or bolts. The outer side wall of the first side wall 131 is vertically arranged and coplanar with the axis of the threaded hole 140, so that the force center of the screw or bolt can be aligned with the first side wall 131. At the same time, half of the mounting column 120 is located outside the outer side wall of the first side wall 131, so that the inner side wall of the limiting rib 230 cooperates to limit the electric heater 200.

[0067] Correspondingly, in some embodiments of the air duct component of the present invention, as Figure 6 As shown, the limiting rib 230 is in an arc shape coaxial with the mounting hole 220 and is located on a side of the mounting hole 220 away from the first side wall 131 .

[0068] In this embodiment, since half of the mounting column 120 is located outside the outer side wall of the first side wall 131, when the limiting rib 230 is set to be an arc coaxial with the mounting hole 220, the inner side wall of the limiting rib 230 can be fitted with the outer side wall of the mounting column 120. On the one hand, when installing the electric heater 200, it is convenient to insert the mounting column 120 into the limiting rib 230. On the other hand, the electric heater 200 is limited and stopped on the arc surface of the mounting column 120 to prevent the electric heater 200 from shaking.

[0069] In some embodiments of the air duct component of the present invention, Figure 2 and Figure 6 As shown, the mounting opening 110 is rectangular in shape as a whole, and there are two mounting posts 120 which are relatively disposed at two ends of the mounting opening 110 in the length direction.

[0070] There are two mounting holes 220 and two limiting ribs 230 disposed corresponding to the two mounting posts 120 .

[0071] In this embodiment, the two mounting posts 120 are located at both ends of the length direction of the rectangular mounting opening 110, and the mounting holes 220 are located at both ends of the length direction of the mounting cover plate 210. The two sets of mounting posts 120 and mounting holes 220 cooperate to firmly mount the electric heater 200 on the end plate 100 to prevent it from detaching and shaking.

[0072] In some embodiments of the air duct component of the present invention, Figure 3 and Figure 6 As shown, an opening groove 150 is provided on one long side of the rectangle, and the opening of the opening groove 150 faces the inside of the installation opening 110 .

[0073] A limiting protrusion 240 matching the opening groove 150 is provided on one side of the mounting cover plate 210 close to the air duct.

[0074] In this embodiment, when the electric heater 200 is inserted, the limiting protrusion 240 cooperates with the opening groove 150 to guide the electric heater 200 so that the mounting hole 220 and the mounting column 120 are aligned, simplifying the installation operation. On the other hand, since the opening groove 150 is arranged on one long side of the rectangle, the limiting protrusion 240 is also arranged on one side of the mounting cover plate 210, it can also achieve foolproofing and prevent the electric heater 200 from being installed upside down. On the other hand, after the electric heater 200 is inserted, the opening groove 150 forms a limit and stop for the limiting protrusion 240, which can prevent the electric heater 200 from shaking.

[0075] In some embodiments of the air duct component of the present invention, Figure 2 As shown, the opening slot 150 is located at the center of the rectangle in the length direction.

[0076] In some embodiments of the air duct component of the present invention, Figure 2 As shown, the mounting post 120 is located at the center of the width of the rectangle.

[0077] In some embodiments of the air duct component of the present invention, Figure 1 As shown, the air duct component further includes an air duct frame 300 , and the end plate 100 is integrally formed at one end of the air duct frame 300 .

[0078] The air duct frame 300 and the end plate 100 define two air ducts arranged in parallel and spaced apart. The end plate 100 is provided with two installation openings 110 spaced apart, and each installation opening 110 is connected to one air duct.

[0079] There are two electric heaters 200 , which are inserted into the two installation openings 110 in a one-to-one correspondence.

[0080] In this embodiment, the air duct component forms two air ducts spaced apart, and a wind wheel, such as a crossflow wind wheel, can be provided in each air duct to improve the temperature adjustment capability of the air conditioner. An electric heater 200 is provided in each air duct to heat the airflow in the respective air duct.

[0081] In some embodiments of the air conditioner indoor unit of the utility model, the air conditioner indoor unit includes an air duct component of any one of the above embodiments or a combination of embodiments and a cross-flow fan wheel corresponding to the air duct one by one, and each cross-flow fan wheel is rotatably arranged in the corresponding air duct along its length direction.

[0082] The indoor unit of the air conditioner can be a vertical cabinet unit, and the crossflow impeller is vertically arranged in the air duct. The indoor unit of the air conditioner can also be a wall-mounted unit, and the crossflow impeller is horizontally arranged in the air duct.

[0083] An air duct may be provided in the indoor unit of the air conditioner, and an electric heater 200 may be provided in the air duct. Two or more air ducts may also be provided in the indoor unit of the air conditioner, and an electric heater 200 may be provided in each air duct.

[0084] 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 from the contents 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 such other variations or modifications.

Claims

1. An air duct component of an air conditioner indoor unit, characterized in that: include: A fixed end plate, the end plate forming an end surface of one end of the air duct of the indoor unit of the air conditioner in the length direction; the end plate is formed with a mounting opening and a mounting column located at the periphery of the mounting opening; An electric heater, the electric heater is inserted into the installation opening along the length direction of the air duct; the electric heater comprises an installation cover plate, the installation cover plate is arranged on a side of the installation opening away from the air duct; Among them, the mounting cover is provided with a mounting hole corresponding to the mounting column, and a limiting rib located on the outer periphery of the mounting hole; the limiting rib is located on the side of the mounting cover close to the air duct, so that the outer side wall of the mounting column blocks the inner side wall of the limiting rib in a direction perpendicular to the insertion direction of the electric heater.

2. The air duct component according to claim 1, characterized in that: A side of the end plate away from the air duct protrudes outward to form a mounting groove, and an inner peripheral wall of the mounting groove forms the mounting opening.

3. The air duct component according to claim 2, characterized in that: The top of the mounting groove is flush with the top of the mounting column; A chamfer is arranged at the top edge of the inner peripheral wall of the installation groove.

4. The air duct component according to claim 2, characterized in that: The mounting post is fixedly connected to the first side wall of the mounting slot; A threaded hole is provided in the mounting column, and an axis of the threaded hole is coplanar with an outer side wall of the first side wall.

5. The air duct component according to claim 4, characterized in that: The limiting convex rib is in an arc shape coaxial with the mounting hole and is located on a side of the mounting hole away from the first side wall.

6. The air duct component according to claim 1, characterized in that: The mounting opening is rectangular in shape as a whole, and there are two mounting posts which are arranged oppositely at two ends of the mounting opening in the length direction; The two mounting holes and the two limiting ribs are each arranged in pairs corresponding to the two mounting posts.

7. The air duct component according to claim 6, characterized in that: An opening groove is provided on one long side of the rectangle, and the opening of the opening groove faces the inside of the installation opening; A limiting protrusion matching the opening groove is arranged on one side of the installation cover plate close to the air duct.

8. The air duct component according to claim 7, characterized in that: The opening slot is located at the center of the length direction of the rectangle; The mounting post is located at the center of the rectangle in the width direction.

9. The air duct component according to claim 1, characterized in that: The air duct component further includes an air duct frame, and the end plate is integrally formed at one end of the air duct frame; The air duct frame and the end plate define two air ducts arranged in parallel and at intervals; the end plate is provided with two installation openings at intervals, and each installation opening is connected to one of the air ducts; There are two electric heaters, which are inserted into the two installation openings in a one-to-one correspondence.

10. An air conditioner indoor unit, characterized in that: It comprises an air duct component as described in any one of claims 1 to 9 and a crossflow wind wheel corresponding to the air duct one by one, and each of the crossflow wind wheels is rotatably arranged in the corresponding air duct along its length direction.

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