Multi-direction air outlet indoor unit

Abstract

The utility model discloses a multi -direction air outlet's indoor unit, including indoor unit main part, the indoor unit main part is provided with respectively first centrifugal fan, second centrifugal fan, third centrifugal fan, the indoor unit main part top side has opened the upper air outlet, the indoor unit main part bottom side has opened the lower air outlet, the indoor unit main part left side has opened the left air outlet, the indoor unit main part right side has opened the right air outlet, this indoor unit is through setting up first centrifugal fan, second centrifugal fan, third centrifugal fan respectively in the indoor unit main part, and the upper air outlet, lower air outlet, left air outlet, right air outlet are synchronous and seted up, has overcome the defect of the conventional upper cold lower hot air outlet air conditioner, has added the function of left and right air outlet, and the left and right air outlet can realize the air outlet of four sides of up and down and left and right, also can control left and right air outlet alone, also can control left and right and upper and lower fan collaborative air outlet, satisfies the demand of different direction air outlet.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and in particular to an indoor unit with multi-directional air outlet. Background Technology

[0002] With the development of air conditioning technology, users have increasingly higher requirements for the comfort of air conditioning airflow. In existing technologies, to fully utilize the convection of cold and hot air, solutions with upper and lower air outlets have emerged, using separate blowers at different outlets. This solution allows cold air to sink from the upper outlet and hot air to rise from the lower outlet, improving the comfort of different airflow methods to some extent through the convection of cold and hot air. However, existing technologies have the following problems: limited airflow direction, only able to blow air up and down, making it difficult to meet the needs of multi-directional airflow; and limited airflow range, unable to meet the different needs of different environments and users for air volume. CN103629739B discloses a multi-outlet air conditioner indoor unit, including a casing, a first fan, a second fan, a first evaporator, a second evaporator, a first air duct, and a second air duct. The first evaporator is located on the air inlet side of the first fan, and the first air duct is located on the air outlet side of the first fan. The second evaporator is located on the air inlet side of the second fan, and the second air duct is located on the air outlet side of the second fan. The first fan, second fan, first evaporator, second evaporator, first air duct, and second air duct are all located inside the casing. The casing includes at least two air outlets and at least one air inlet. The positions of the air outlets correspond to the air outlet positions of the first and second air ducts. The positions of the air inlets correspond to the positions of the evaporators. Although this indoor unit has two air outlets, the airflow cannot be adjusted, resulting in insufficient practicality. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a practical and reliable indoor unit with multi-directional air outlet.

[0004] To achieve the above objectives, the present invention provides the following solution: an indoor unit with multi-directional air outlet, comprising an indoor unit body, wherein a first centrifugal fan, a second centrifugal fan, and a third centrifugal fan are respectively arranged inside the indoor unit body; an upper air outlet is opened on the top side of the indoor unit body; a lower air outlet is opened on the bottom side of the indoor unit body; a left air outlet is opened on the left side of the indoor unit body; and a right air outlet is opened on the right side of the indoor unit body; the first centrifugal fan is used to blow cold air, and the third centrifugal fan is used to blow hot air.

[0005] The beneficial effects of this utility model are as follows: Compared with the prior art, this indoor unit overcomes the defects of conventional air conditioners with top-cooling and bottom-heating air outlets by setting a first centrifugal fan, a second centrifugal fan, and a third centrifugal fan in the main body of the indoor unit, and simultaneously opening an upper air outlet, a lower air outlet, a left air outlet, and a right air outlet. It adds the function of left and right air outlets. The left and right air outlets can not only cooperate with the upper and lower air outlets to achieve air outlets in four directions, but also control the left and right air outlets independently, and can also control the left and right air outlets to cooperate with the upper and lower fans to meet the needs of air outlets in different directions, resulting in better air outlet effect and better user experience.

[0006] Furthermore, the indoor unit body is formed with a first chamber, a second chamber, and a third chamber arranged sequentially from top to bottom. The first chamber is connected to the upper air outlet, the second chamber is connected to the left air outlet and the right air outlet respectively, and the third chamber is connected to the lower air outlet.

[0007] Furthermore, a first air duct is formed within the main body of the indoor unit. One end of the first air duct is connected to the upper air outlet, and the other end is connected to the second chamber. With the above structure, the second centrifugal fan can also provide airflow compensation to the upper air outlet, increasing the airflow in conjunction with the first centrifugal fan to achieve a high-speed airflow effect.

[0008] Furthermore, a second air duct is formed within the main body of the indoor unit. One end of the second air duct is connected to the lower air outlet, and the other end is connected to the second chamber. With the above structure, the second centrifugal fan can also provide airflow compensation to the lower air outlet, and together with the third centrifugal fan, increase the airflow to achieve a high-speed airflow effect.

[0009] Furthermore, a left air valve switch is provided between the left air outlet and the second chamber, a right air valve switch is provided between the right air outlet and the second chamber, an upper air valve switch is provided between the first air duct and the second chamber, and a lower air valve switch is provided between the second air duct and the second chamber. With the above structure, this invention enables control of the second centrifugal fan to deliver air to the first air duct, the second air duct, the left air outlet, and the right air outlet.

[0010] Furthermore, the upper air outlet, lower air outlet, left air outlet, and right air outlet are all equipped with air guide plates and grilles. With the above structure, this utility model guides the airflow from the upper air outlet, lower air outlet, left air outlet, and right air outlet.

[0011] Furthermore, an air inlet is provided on the rear side of the indoor unit body, and the air inlet is provided with a grille.

[0012] This utility model also includes an air outlet control method for an indoor unit with multi-directional air outlet, comprising the following steps: When air needs to be vented from all four sides, the air guide plates and grilles of the upper air outlet, lower air outlet, left air outlet, and right air outlet are opened respectively. Then, the first centrifugal fan, the second centrifugal fan, and the third centrifugal fan are started respectively. The first centrifugal fan, the second centrifugal fan, and the third centrifugal fan deliver air to the upper air outlet, the lower air outlet, the left air outlet, and the right air outlet respectively. When it is necessary to blow air from the top, open the air guide plate and grille of the top air outlet, close the air guide plates and grilles of the bottom air outlet, left air outlet and right air outlet, and then start one or three of the first centrifugal fan, second centrifugal fan and third centrifugal fan to blow air to the top air outlet. When it is necessary to blow air downwards, open the air guide plate and grille of the lower air outlet, close the air guide plates and grilles of the upper air outlet, left air outlet and right air outlet, and then start one or three of the first centrifugal fan, second centrifugal fan and third centrifugal fan to blow air downwards. When it is necessary to blow air to the left and right, open the air guide plates and grilles of the left and right air outlets, close the air guide plates and grilles of the upper and lower air outlets, and then start one or three of the first, second, and third centrifugal fans to deliver air to the left and right air outlets.

[0013] Furthermore, when air needs to be vented from all four sides, the left and right air valves are opened, and then the first, second, and third centrifugal fans are started respectively. The first centrifugal fan blows air to the upward air outlet, the third centrifugal fan blows air to the downward air outlet, and the second centrifugal fan blows air to the left and right air outlets respectively. When it is necessary to blow air from the top, close the left air valve switch, the right air valve switch, and the bottom air valve switch, and then start the first centrifugal fan to blow air upwards to the air outlet. When it is necessary to blow air downwards, control the left air valve switch, right air valve switch, and top air valve switch to close, and then start the third centrifugal fan, which blows air downwards to the air outlet. When left and right airflow is required, the upper and lower air valves are closed, the second centrifugal fan is started, the left air valve is opened, and the second centrifugal fan blows air to the left outlet. The right air valve is then opened, and the second centrifugal fan blows air to the right outlet. This invention employs the above method, controlling the operation of the first, second, and third centrifugal fans in the indoor unit, and coordinating with the control of the air valves on the ducts where different fans are located to control airflow in different directions, as well as adjusting the airflow volume of the vertical airflow. This achieves multi-directional airflow and also allows for adjustment and compensation of the airflow volume of the main vertical airflow, meeting the needs of multi-directional airflow and greatly improving the user experience. The entire control method is practical.

[0014] Furthermore, when the air is vented from all four sides, the air volume of the upper and lower air outlets is greater than that of the left and right air outlets when the upper and lower air outlets are opened.

[0015] Furthermore, when blowing out a single airflow, opening the airflow valve switch and starting the second centrifugal fan will increase the airflow from the upper air outlet.

[0016] Furthermore, when blowing out a single downdraft, opening the downdraft valve switch and starting the second centrifugal fan will increase the air volume at the downdraft outlet. Attached Figure Description

[0017] Figure 1 This is a side view of an embodiment of the present invention.

[0018] Figure 2 This is an internal structural diagram of Embodiment 1 of the present invention.

[0019] Figure 3 This is a perspective view of Embodiment 2 of the present invention.

[0020] Figure 4 This is a schematic diagram of the internal structure of Embodiment 2 of this utility model.

[0021] Figure 5 This is a diagram showing the air outlet status in the upper, lower, left, and right directions of Embodiment 2 of this utility model.

[0022] Figure 6 This is a diagram showing the air outlet state in Embodiment 2 of this utility model.

[0023] Figure 7 This is a diagram showing the air outlet state in Embodiment 2 of this utility model.

[0024] In this diagram, 1 is the indoor unit body, 11 is the first chamber, 12 is the second chamber, 13 is the third chamber, 14 is the first air duct, 15 is the second air duct, 16 is the upper air outlet, 17 is the lower air outlet, 18 is the left air outlet, 19 is the right air outlet, 10 is the air guide plate, 101 is the grille, 102 is the air inlet, 21 is the first centrifugal fan, 22 is the second centrifugal fan, 23 is the third centrifugal fan, 31 is the upper air valve switch, 32 is the lower air valve switch, 33 is the left air valve switch, and 34 is the right air valve switch. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Example 1:

[0027] See appendix Figure 1 To be continued Figure 2 As shown, an indoor unit with multi-directional air outlet includes an indoor unit body 1. A first centrifugal fan 21, a second centrifugal fan 22, and a third centrifugal fan 23 are respectively installed inside the indoor unit body 1. An upper air outlet 16 is opened on the top side of the indoor unit body 1, a lower air outlet 17 is opened on the bottom side of the indoor unit body 1, a left air outlet 18 is opened on the left side of the indoor unit body 1, and a right air outlet 19 is opened on the right side of the indoor unit body 1. The first centrifugal fan 21 is used to blow cold air, and the third centrifugal fan 23 is used to blow hot air. The first centrifugal fan 21, the second centrifugal fan 22, and the third centrifugal fan 23 are arranged on the same vertical line.

[0028] In this embodiment, the upper air outlet 16, the lower air outlet 17, the left air outlet 18, and the right air outlet 19 are respectively provided with air guide plates 10 and grilles 101.

[0029] In this embodiment, a millimeter-wave radar is installed inside the indoor unit body 1.

[0030] In this embodiment, an air inlet 102 is provided on the rear side of the indoor unit body 1, and the air inlet 102 is provided with a grille 101.

[0031] In this embodiment, an evaporator is installed inside the indoor unit body 1.

[0032] This embodiment also includes a method for controlling the airflow of an indoor unit with multi-directional airflow, comprising the following steps: Open the grille 102 on the air inlet 101, and indoor air enters the indoor unit body 1 through the air inlet 101.

[0033] When four-way airflow is required, the air guide plates 10 and grilles 101 of the upper air outlet 16, lower air outlet 17, left air outlet 18, and right air outlet 19 are opened respectively. Then, the first centrifugal fan 21, the second centrifugal fan 22, and the third centrifugal fan 23 are started respectively. The first centrifugal fan 21, the second centrifugal fan 22, and the third centrifugal fan 23 respectively draw air from the indoor unit body 1 and deliver air to the upper air outlet 16, lower air outlet 17, left air outlet 18, and right air outlet 19.

[0034] When it is necessary to blow air from the top, the air guide plate 10 and grille 101 of the upper air outlet 16 are opened, and the air guide plates 10 and grilles 101 of the lower air outlet 17, left air outlet 18, and right air outlet 19 are closed. Then, one to three of the first centrifugal fan 21, the second centrifugal fan 22, and the third centrifugal fan 23 are started. The corresponding fans draw air from the indoor unit body 1 and send air to the upper air outlet 16.

[0035] When a single downward airflow is required, the air guide plate 10 and grille 101 of the lower air outlet 17 are opened, and the air guide plates 10 and grilles 101 of the upper air outlet 16, left air outlet 18, and right air outlet 19 are closed. Then, one to three of the first centrifugal fan 21, the second centrifugal fan 22, and the third centrifugal fan 23 are started. The corresponding fans draw air from the indoor unit body 1 and deliver air to the lower air outlet 17.

[0036] When it is necessary to blow air from the left and right, the air guide plates 10 and grilles 101 of the left air outlet 18 and the right air outlet 19 are opened, and the air guide plates 10 and grilles 101 of the upper air outlet 16 and the lower air outlet 17 are closed. Then, one to three of the first centrifugal fan 21, the second centrifugal fan 22, and the third centrifugal fan 23 are started. The corresponding fans draw air from the indoor unit body 1 and deliver air to the left air outlet 18 and the right air outlet 19.

[0037] The air volume distribution between the upper air outlet 16 and the lower air outlet 17 and the left air outlet 18 and the right air outlet 19 is approximately 1:1:8. When only the upper air outlet 16 and the lower air outlet 17 or the left air outlet 18 and the right air outlet 19 are opened, the air volume is approximately 80% of that when all four air outlets are opened at the same time.

[0038] In heating mode, the bottom air outlet 17 is turned on by default. When the heating mode is in the wind avoidance mode, the bottom air outlet 17 is turned on first. At the same time, the radar detects people in the room and turns on the left air outlet 18 and the right air outlet 19. The system judges the position of the detected people based on the following: ① When only one person is detected on the left or right, the air outlet on the other side is controlled to blow air; ② When people are detected on both sides, only the bottom air outlet 17 is controlled to blow air.

[0039] Correspondingly, when the heating mode is activated and the airflow follows the person, the lower air outlet 17, the left air outlet 18, and the right air outlet 19 are opened. The millimeter-wave radar detects the position of the person. When a person is detected on the left or right side, in addition to opening the lower air outlet 17, hot air is concentrated and blown towards the person's location. When a person is detected on both sides, the lower air outlet 17, the left air outlet 18, and the right air outlet 19 remain open to blow hot air.

[0040] Based on the overall direction of the controlled airflow, since both the left air outlet 18 and the right air outlet 19 are equipped with air guide plates 10 and grilles 101, when the air guide plate 10 is closed, the corresponding left air outlet 18 and right air outlet 19 are closed. When the air guide plate 10 rotates left and right, it can control the size of the left air outlet 18 or the right air outlet 19, so as to achieve the decentralized or centralized control of the airflow from the left air outlet 18 and the right air outlet 19. The grille 101 can swing up and down to control the up and down sweeping function.

[0041] To achieve more precise airflow control based on the person's movement using millimeter-wave radar, while the left and right air outlets 18 and 19 generally control the airflow direction, they also work in conjunction with the air guide plate 10 and grille 101 to finely control the airflow direction and volume, in addition to the millimeter-wave radar identifying the person's position. For example, when the hot air following the person's movement mode is activated, if multiple people are detected on the left side of the air conditioner, the air guide plate 10 of the left air outlet 18 controls the left air outlet 18 to open to its maximum extent. This disperses the airflow from the left air outlet 18, allowing it to blow air onto multiple people on the left simultaneously. The grille 101 of the left air outlet 18 controls the airflow to blow downwards. However, if only one person is detected on the left, the millimeter-wave radar further detects the person's specific location and controls the air guide plate 10 to open only towards the person's location, ensuring that the left air outlet 18 blows air only towards that single person. This ensures that the airflow accurately follows the person, and with a fixed fan power, the airflow is also more concentrated. In addition, since the grilles 101 of the left air outlet 18 and the right air outlet 19 can swing up and down, the air blown out of the left air outlet 18 and the right air outlet 19 can be controlled to go up or down. Accordingly, if the millimeter-wave radar detects that a person is on the left side, the air guide plate 10 controls the left air outlet 18 or the right air outlet 19 to follow the person's movement. The grilles 101 can concentrate the airflow on a part of the body according to the user's needs. For example, when blowing air onto the body, the grilles 101 control the airflow to blow downwards, and when blowing air onto the head, the grilles control the airflow to blow upwards. Example 2:

[0042] The difference between this embodiment and Embodiment 1 is as follows: See appendix Figure 3 To be continued Figure 7As shown, in this embodiment, the indoor unit body 1 is formed with a first chamber 11, a second chamber 12, and a third chamber 13 arranged sequentially from top to bottom. The first chamber 11 is connected to the upper air outlet 16, the second chamber 12 is connected to the left air outlet 18 and the right air outlet 19 respectively, and the third chamber 13 is connected to the lower air outlet 17.

[0043] In this embodiment, a first air duct 14 is formed inside the indoor unit body 1. One end of the first air duct 14 is connected to the upper air outlet 16, and the other end is connected to the second chamber 12. A second air duct 15 is formed inside the indoor unit body 1. One end of the second air duct 15 is connected to the lower air outlet 17, and the other end is connected to the second chamber 12.

[0044] In this embodiment, a left air valve switch 33 is provided between the left air outlet 18 and the second chamber 12, a right air valve switch 34 is provided between the right air outlet 19 and the second chamber 12, an upper air valve switch 31 is provided between the first air duct 14 and the second chamber 12, and a lower air valve switch 32 is provided between the second air duct 15 and the second chamber 12.

[0045] When four-way airflow is required, the air guide plates 10 and grilles 101 of the upper air outlet 16, lower air outlet 17, left air outlet 18, and right air outlet 19 are opened respectively, as are the left air valve switch 33 and right air valve switch 34. Then, the first centrifugal fan 21, the second centrifugal fan 22, and the third centrifugal fan 23 are started respectively. The first centrifugal fan 21 blows air to the upper air outlet 16, the third centrifugal fan 23 blows air to the lower air outlet 17, and the second centrifugal fan 22 blows air to the left air outlet. Air is supplied to the right air outlet 18 and the right air outlet 19. At this time, the upper air valve switch 31 and the lower air valve switch 32 are closed. This allows the first centrifugal fan 21 to supply air to the upper air outlet 16 alone, the third centrifugal fan 23 to supply air to the lower air outlet 17 alone, and the second centrifugal fan 22 to supply air only to the left air outlet 18 and the right air outlet 19. This makes the air volume of the upper air outlet 16, the lower air outlet 17, the left air outlet 18, and the right air outlet 19 relatively balanced, realizing a four-way air supply mode. When the upper air valve switch 31 and the lower air valve switch 32 are opened, the second centrifugal fan 22 sends air to the upper air outlet 16 through the first air duct 14 and to the lower air outlet 17 through the second air duct 15. At this time, the first air duct 14 and the second air duct 15 will divert the air volume delivered by the second centrifugal fan 22 to the left air outlet 18 and the right air outlet 19, so that the air volume of the upper air outlet 16 and the lower air outlet 17 is larger, and the air volume of the left air outlet 18 and the right air outlet 19 is smaller. That is, the air volume of the upper air outlet 16 and the lower air outlet 17 is greater than the air volume of the left air outlet 18 and the right air outlet 19.

[0046] When a single-upper-air mode is required, the air guide plate 10 and grille 101 of the upper air outlet 16 are opened, the air guide plates 10 and grilles 101 of the lower air outlet 17, left air outlet 18, and right air outlet 19 are closed, the left air valve switch 33, right air valve switch 34, lower air valve switch 32, and upper air valve switch 31 are closed, and then the first centrifugal fan 21 is started, which blows air to the upper air outlet 16. At this time, it is in low wind speed mode. When blowing out a single airflow, open the airflow valve switch 31 and start the second centrifugal fan 22. The second centrifugal fan 22 blows air to the upper air outlet 16 through the first air duct 14, which will increase the airflow of the upper air outlet 16. At this time, it is in high-speed mode.

[0047] When a single downdraft mode is required, the air guide plate 10 and grille 101 of the lower air outlet 17 are opened, the air guide plates 10 and grilles 101 of the upper air outlet 16, left air outlet 18, and right air outlet 19 are closed, the left air valve switch 33, right air valve switch 34, upper air valve switch 31, and lower air valve switch 32 are closed, and then the third centrifugal fan 23 is started. The third centrifugal fan 23 blows air to the lower air outlet 17, which is in low wind speed mode. When blowing out a single downdraft, open the downdraft valve switch 32 and start the second centrifugal fan 22. The second centrifugal fan 22 blows air down to the air outlet 17 through the second air duct 15, which will increase the air volume of the downdraft outlet 17. At this time, it is in high-speed mode.

[0048] When the left and right air outlet mode is required to blow air in the left and right directions, the air guide plate 10 and grille 101 of the left air outlet 18 and right air outlet 19 are opened, the air guide plate 10 and grille 101 of the upper air outlet 16 and lower air outlet 17 are closed, the upper air valve switch 31 and lower air valve switch 32 are closed, and then the second centrifugal fan 22 is started. When the left air valve switch 33 is opened alone, the second centrifugal fan 22 will only send air to the left air outlet 18; when the right air valve switch 34 is opened alone, the second centrifugal fan 22 will only send air to the right air outlet 19, thus achieving unidirectional air outlet. If the left air valve switch 33 and the right air valve switch 34 are opened at the same time, the second centrifugal fan 22 will send air to the left air outlet 18 and the right air outlet 19 respectively, thus achieving left and right air supply.

[0049] Coordinated control mode: According to actual needs, two of the air outlets, namely the upper air outlet 16, lower air outlet 17, left air outlet 18, and right air outlet 19, can be controlled to supply air. If air needs to be supplied from the upper air outlet 16 and the left air outlet 18, the first centrifugal fan 21 and the second centrifugal fan 22 will be started, and the lower air valve switch 32 and the right air valve switch 34 will be closed at the same time.

[0050] In this embodiment, the air guide plates 10 and grilles 101 of the upper air outlet 16, lower air outlet 17, left air outlet 18, and right air outlet 19 can all guide the airflow direction when it blows out from the upper air outlet 16, lower air outlet 17, left air outlet 18, and right air outlet 19. The upper air outlet 16, lower air outlet 17, left air outlet 18, and right air outlet 19 can all blow air up, down, left, and right.

[0051] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Any person skilled in the art can make more possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, all equivalent changes made based on the concept of this utility model without departing from the content of the technical solution of this utility model should be covered within the protection scope of this utility model.

Claims

1. A multi-direction air outlet indoor unit, comprising an indoor unit main body, characterized in that: The indoor unit body is equipped with a first centrifugal fan, a second centrifugal fan, and a third centrifugal fan. The top side of the indoor unit body has an upper air outlet, the bottom side of the indoor unit body has a lower air outlet, the left side of the indoor unit body has a left air outlet, and the right side of the indoor unit body has a right air outlet.

2. The indoor unit of claim 1, wherein: The indoor unit body has a first chamber, a second chamber, and a third chamber arranged sequentially from top to bottom. The first chamber is connected to the upper air outlet, the second chamber is connected to the left air outlet and the right air outlet respectively, and the third chamber is connected to the lower air outlet.

3. The indoor unit of claim 2, wherein: The indoor unit body has a first air duct formed inside, one end of which is connected to the upper air outlet, and the other end is connected to the second chamber.

4. The indoor unit of claim 3, wherein: The indoor unit body has a second air duct formed inside, one end of which is connected to the lower air outlet and the other end is connected to the second chamber.

5. The indoor unit of claim 4, wherein: A left air valve switch is provided between the left air outlet and the second chamber, a right air valve switch is provided between the right air outlet and the second chamber, an upper air valve switch is provided between the first air duct and the second chamber, and a lower air valve switch is provided between the second air duct and the second chamber.

6. The indoor unit of claim 1, wherein: The upper air outlet, lower air outlet, left air outlet, and right air outlet are all equipped with air guide plates and grilles.

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