CN218544601U

CN218544601U - Machine and air conditioner in air conditioning

Info

Publication number: CN218544601U
Application number: CN202222727528.1U
Authority: CN
Inventors: 李世泽; 卢嘉欣
Original assignee: GD Midea Air Conditioning Equipment Co Ltd; Handan Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd; Handan Midea Air Conditioning Equipment Co Ltd
Priority date: 2022-10-17
Filing date: 2022-10-17
Publication date: 2023-02-28
Anticipated expiration: 2032-10-17

Abstract

The application relates to the technical field of air conditioning, and provides an air-conditioning indoor unit and an air conditioner, wherein the air-conditioning indoor unit comprises a shell and a fresh air device, an air duct is formed in the shell, a local part of the side wall of the shell is configured to be an installation part, the installation parts are respectively configured on a plurality of side walls with different directions, the installation part is disassembled and assembled to form a fresh air port, and the fresh air port is communicated with the air duct; the fresh air device is arranged at the fresh air inlet. The application provides an air conditioner indoor unit and an air conditioner, which can improve the installation flexibility of a fresh air device.

Description

Machine and air conditioner in air conditioning

Technical Field

The application relates to the technical field of air conditioning, in particular to an air conditioner indoor unit and an air conditioner.

Background

An air conditioner, i.e., an air conditioner, is a device that manually adjusts and controls parameters such as temperature, humidity, and flow rate of ambient air in a building or structure. The air conditioner is an indispensable part of people in modern life, provides cool or warm for people, but simultaneously, the air conditioner is used indoors for a long time, so that the indoor air quality obviously feels to be poor, and diseases are easily caused after the air conditioner is used indoors for a long time. If the ventilation is performed by windowing, the heat exchange efficiency is reduced. Along with people's attention to fresh air promotes gradually, health consciousness strengthens gradually, promotes by a wide margin to the attention to the health class air conditioner that has the new trend function.

In the related art, the installation position of a fresh air device of an indoor unit of an air conditioner is fixed and unique, so that the requirements of various installation scenes cannot be met.

SUMMERY OF THE UTILITY MODEL

In view of this, it is desirable to provide an air conditioner indoor unit and an air conditioner, which can improve the installation flexibility of the fresh air device.

In order to achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

the embodiment of the application discloses an air conditioner indoor unit on one hand, which comprises an indoor unit, a heat exchanger and a heat exchanger, wherein the indoor unit comprises a heat exchanger and a heat exchanger;

the air conditioner comprises a shell, a fan and a fan, wherein an air duct is formed in the shell, a local part of the side wall of the shell is configured to be an installation part, the installation parts are respectively configured on the side walls with different directions, the installation parts are disassembled and assembled to form a fresh air opening, and the fresh air opening is communicated with the air duct;

the fresh air device is arranged at the fresh air port.

In an embodiment, at least a portion of one of the side walls of the housing is configured as a shielding plate which is detachably connected, a portion where the shielding plate is located is a first air opening after being detached, a second air opening is formed in the other side wall of the housing, the shielding plate can shield one of the first air opening and the second air opening, the other one of the first air opening and the second air opening is an indoor air inlet, and the indoor air inlet is communicated with the air duct.

In one embodiment, the mounting portion is formed on the shielding plate.

In one embodiment, the fresh air device includes:

the shell is arranged on the shell, and a fresh air channel communicated with the air channel is formed in the shell;

the adjusting plate is rotatably arranged in the fresh air channel and can be cut off or switched on the fresh air channel.

In one embodiment, the housing is removably connected to the housing.

In one embodiment, the rotation axis of the adjusting plate coincides with the central line thereof, the plane perpendicular to the flow direction of fresh air in the fresh air channel is a reference plane, a first angle and a second angle are arranged between the adjusting plate and the reference plane, the adjusting plate can be parked at any position between the first angle and the second angle, wherein the first angle is 0 °, and the second angle is 90 °.

In one embodiment, the casing has an indoor air inlet communicated with the air duct, and a ratio of an air inlet volume of the fresh air duct to a first air inlet volume is 0.05-0.1, wherein the first air inlet volume is a sum of the air inlet volume of the fresh air duct and the air inlet volume of the indoor air inlet.

In one embodiment, the fresh air device comprises a synchronous motor, the synchronous motor is arranged on the shell, and a motor shaft of the synchronous motor is connected with the adjusting plate.

In one embodiment, the indoor unit of the air conditioner comprises an air purification device, and the air purification device is arranged in the air duct.

The embodiment of the application discloses an air conditioner on the other hand, including the indoor unit of air conditioner in any one of the above-mentioned embodiments.

The embodiment of the application discloses an air conditioner indoor unit and an air conditioner, wherein a fresh air device is arranged on a shell, so that outdoor fresh air can be sent into a room, the indoor air quality is improved, and the use experience of a user is improved; through set up the installation department respectively on a plurality of different lateral walls of orientation, like this, alright with the new trend device install the new trend mouth department that the lateral wall of the difference of casing formed to different installation scenes, so, be convenient for in order to dodge the structure, be convenient for install, the installation is nimble.

Drawings

Fig. 1 is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present disclosure;

fig. 2 is a schematic structural view of an indoor unit of an air conditioner according to another embodiment of the present disclosure;

FIG. 3 is an exploded view of the fresh air device of FIG. 1;

FIG. 4 is a schematic structural view of the fresh air device of FIG. 1, wherein a first angle is formed between the adjusting plate and the reference plane;

FIG. 5 is a schematic structural view of the fresh air device of FIG. 1, wherein a second angle is formed between the adjusting plate and the reference plane;

FIG. 6 schematically illustrates a fresh air channel;

fig. 7 is a sectional view of the fresh air channel and the adjusting plate along the flow direction of fresh air.

Description of the reference numerals

An indoor air-conditioning unit 100; a housing 1; an air duct 1a; an attachment portion 1b; a fresh air port 1c; a shield plate 1d; a first tuyere 1e; a second tuyere 1f; an indoor air inlet 1g; an air outlet is 1h; a front side wall 11; a rear side wall 12; a top sidewall 13; a bottom sidewall 14; a left side wall 15; a right side wall 16; a fresh air device 2; a housing 21; a fresh air channel 21a; an adjusting plate 22; a seal ring 23; a synchronous motor 24; an air purification device 3; the reference surface S1.

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

The present application will be described in further detail with reference to the following drawings and specific embodiments. The descriptions of "first," "second," etc. in the embodiments of the present application are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly including at least one feature. In the description of the embodiments of the present application, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In an aspect of the present disclosure, referring to fig. 1 or fig. 2, an air conditioning indoor unit 100 includes a casing 1 and a fresh air device 2. The casing 1 is formed with wind channel 1a, and the local position of the lateral wall of casing 1 is configured as installation department 1b, and a plurality of orientation looks different lateral walls respectively configure installation department 1b, and installation department 1b is dismantled and is formed a fresh air inlet 1c, and fresh air inlet 1c communicates with wind channel 1a. The fresh air device 2 is arranged at the fresh air inlet 1 c.

The fresh air device 2 is a device for introducing fresh air from the outside into the room.

In the embodiment, the fresh air device 2 is arranged on the shell 1, so that outdoor fresh air can be sent into a room to improve the indoor air quality and improve the use experience of a user; through set up installation department 1b respectively on a plurality of different lateral walls of orientation, like this, alright with install fresh air device 2 in the fresh air opening 1c department that the lateral wall of the difference of casing 1 formed to the installation scene of difference, so, in order to dodge the structure, the installation of being convenient for, the installation is nimble. Left and right direction

For example, referring to fig. 1 or fig. 2, in an embodiment, the housing 1 includes a front sidewall 11, a rear sidewall 12, a top sidewall 13, a bottom sidewall 14, a left sidewall 15, and a right sidewall 16, which together enclose the air duct 1a, and the housing 1 is substantially rectangular.

In an embodiment, referring to fig. 1 and fig. 2, at least a portion of one sidewall of the housing 1 is configured as a shielding plate 1d detachably connected, and a portion of the shielding plate 1d is a first air opening 1e after being detached. For example, a portion of the rear sidewall 12 or a portion of the bottom sidewall 14 may be selectively configured as the detachable shielding plate 1d, for example, after selecting a portion of the bottom sidewall 14 as the shielding plate 1d, and after detaching the shielding plate 1d, the bottom sidewall 14 is formed with the first tuyere 1e. In this way, when selecting the shielding plate 1d, a part of the casing 1 itself is removed to form the shielding plate 1d without introducing a new material, and the manufacturing cost of the air conditioning indoor unit 100 can be reduced.

Referring to fig. 1 and 2, a second air opening 1f is formed in another side wall of the housing 1, the shielding plate 1d can shield one of the first air opening 1e and the second air opening 1f, the other one of the first air opening 1e and the second air opening 1f is an indoor air inlet 1g, and the indoor air inlet 1g is connected to the air duct 1a. For example, the second air inlet 1f may be disposed on the rear sidewall 12, so that, according to the installation requirement, the shielding plate 1d may be selectively used to block one of the first opening and the second opening, and the other one may be used as the indoor air inlet 1g, for example, if the bottom sidewall 14 needs to be installed close to the wall or there is another object at the bottom sidewall 14 to block the air, the shielding plate 1d may be selected to block the first air inlet 1e on the bottom sidewall 14, and the second air inlet 1f on the rear sidewall 12 may be selected as the indoor air inlet 1g; for another example, if the rear sidewall 12 needs to be installed close to a wall or other objects are located at the rear sidewall 12 to block the air, the shielding plate 1d may be selected to block the second air inlet 1f on the rear sidewall 12, and the first air inlet 1e on the bottom sidewall 14 is selected as the indoor air inlet 1g; for another example, when the front sidewall 11 needs to be installed on a wall, if there are other objects at the bottom sidewall 14 to block the air, the shielding plate 1d may be selected to block the first air inlet 1e on the bottom sidewall 14, the second air inlet 1f on the rear sidewall 12 is selected to be the indoor air inlet 1g, if there are other objects at the rear sidewall 12 to block the air, the shielding plate 1d may be selected to block the second air inlet 1f on the rear sidewall 12, and the first air inlet 1e on the bottom sidewall 14 is selected to be the indoor air inlet 1g. Therefore, the problem that the air inlet area of the indoor air inlet 1g is reduced due to the blocking of an indoor structure can be solved, and the installation flexibility is improved.

In an exemplary embodiment, the indoor unit 100 of the air conditioner can be installed in a top-bottom direction, for example, the front sidewall 11 of the indoor unit of the air conditioner can be hung on a wall of a small space such as a utility room or a closet, and the space utilization rate is high without occupying the space of a ceiling.

In an exemplary embodiment, the shielding plate 1d is detachably connected to the housing 1 in a manner including, but not limited to: screw joint, clamping joint or magnetic attraction, etc. For example, the shielding plate 1d is formed with a first mounting hole, the housing 1 is formed with a second mounting hole, and the shielding plate 1d can be fixed to the housing 1 by fastening members such as screws or bolts passing through the first mounting hole and the second mounting hole.

For example, in an embodiment, the projection shape of the first tuyere 1e along the air inlet direction thereof is not limited, and for example, may be a circle, a rectangle, a square, or the like.

For example, in an embodiment, the projection shape of the second tuyere 1f along the air inlet direction thereof is not limited, and may be, for example, a circle, a rectangle, a square, or the like.

In one embodiment, the indoor unit 100 of the air conditioner includes a fan and a heat exchanger, the casing 1 is formed with an air outlet 1h, the indoor air inlet 1g and the indoor air outlet 1h are both communicated with the air duct 1a, and the fan and the heat exchanger are located in the air duct 1a. The fan drives airflow to enter the air duct 1a from the indoor air inlet 1g and the fresh air inlet 1c, and the airflow is blown out from the air outlet 1h after heat exchange of the heat exchanger, so that the heating and/or refrigerating functions are realized.

For example, in an embodiment, referring to fig. 1 and 2, the air outlet 1h may be disposed on the top sidewall 13.

In an exemplary embodiment, the air conditioning indoor unit 100 may be a duct type duct machine, and the type of the duct type duct machine is not limited, for example, the air conditioning indoor unit may be a wall-mounted duct type duct machine, and the air conditioning indoor unit has the characteristics of compact structure, light weight, flexible installation, and the like.

Illustratively, in one embodiment, the fan and the heat exchanger are arranged at intervals in the front-rear direction of the housing 1.

For example, in an embodiment, referring to fig. 1 or fig. 2, the number of the mounting portions 1b is not limited, for example, the number of the mounting portions 1b may be 3, for example, one mounting portion may be disposed on each of the left side wall 15, the right side wall 16 and the bottom side wall 14, so as to increase the mounting positions of the mounting portions 1b, that is, the mounting positions of the fresh air ports 1c may be increased, so that the mounting selectivity is high, and the mounting flexibility of the fresh air device 2 is improved.

In an embodiment, referring to fig. 1 and fig. 2, a mounting portion 1b is formed on the shielding plate 1 d. Like this, can further increase the mounted position of installation department 1b along with the different modes that shielding plate 1d shielded first wind gap 1e or second wind gap 1f, further improve the installation flexibility of new trend device 2.

In one embodiment, referring to fig. 3 to 5, the fresh air device 2 includes a housing 21 and an adjusting plate 22. The casing 21 is provided on the housing 1, and the casing 21 is formed with a fresh air passage 21a communicating with the air duct 1a. The adjusting plate 22 is rotatably disposed in the fresh air channel 21a, and the adjusting plate 22 can cut off or open the fresh air channel 21a. Therefore, when the indoor air quality needs to be improved, the fresh air channel 21a can be conducted by rotating the adjusting plate 22, so that outdoor fresh air enters the air channel 1a and is treated, and finally is discharged to the indoor from the air outlet 1h, and therefore the indoor air quality is improved, and the user experience is good; when the indoor air quality is not required to be improved, the fresh air channel 21a can be cut off by rotating the adjusting plate 22, so that the air in the air channel 1a can be prevented from leaking to the outdoor through the fresh air inlet 1c, the air output of the air outlet 1h is reduced, and the heat exchange effect is improved.

For example, in an embodiment, the shape of the housing 21 is not limited, for example, the projection along the fresh air flowing direction in the fresh air channel 21a, the projection of the housing 21 may be square or rectangular, and the like.

In one embodiment, the housing 21 is removably attached to the housing 1. Illustratively, a third mounting hole is formed on the left side wall 15, and a fourth mounting hole is formed on the housing 21, and screws or studs or the like can be inserted through the third mounting hole and the fourth mounting hole to fix the housing 21 on the casing 1. Thus, when the worker needs to maintain the fresh air device 2, for example, to clean or repair the fresh air device 2, the casing 21 can be directly detached from the housing 1, which facilitates maintenance of the internal components thereof.

In one embodiment, referring to fig. 3, the fresh air device 2 includes a sealing ring 23, and the sealing ring 23 is disposed between the casing 21 and the housing 1. Thus, the air flow in the air duct 1a can be effectively prevented from leaking out from the gap between the casing 21 and the casing 1, so as to improve the heat exchange effect of the indoor unit 100 of the air conditioner.

Illustratively, in one embodiment, at least a portion of the housing 21 is located on a side of the casing 1 facing away from the air chute 1a. Thus, on the one hand, the worker can further easily detach the housing 21; on the other hand, the occupied space of the air duct 1a can be reduced, the space utilization rate is high, and the miniaturization is facilitated.

In an embodiment, referring to fig. 1 or fig. 2, the indoor unit 100 of the air conditioner includes an air purifying device 3, and the space purifying device is disposed in the air duct 1a. Like this, can purify the air that gets into from indoor air intake 1g and/or fresh air inlet 1c through air purification device 3 to improve the cleanliness factor of air, user experience feels good.

In one embodiment, the air purification apparatus 3 comprises a coarse and/or fine screen. Illustratively, the air cleaning device 3 may include a coarse filter for filtering air, so that large particle impurities may be filtered and wind resistance may be reduced. The air purifying device 3 may also include a fine filter screen, for example, the fine filter screen may filter out particles with an equivalent diameter of 0.1 μm to 2.5 μm and filter out particles with an equivalent diameter of 0.1 μm to 0.3 μm in PM2.5, the fine filter screen may be an activated carbon filter screen to filter out harmful substances such as formaldehyde, toluene, and chlorobenzene, and the fine filter screen may also have an IFD (Intense electric Field) purifying function using a Dielectric material as a carrier. In some embodiments, the air purification apparatus 3 may include a combination of a fine screen and a coarse screen.

In an embodiment, referring to fig. 4 and 5, the rotation axis of the adjusting plate 22 coincides with the center line thereof, a plane perpendicular to the fresh air flowing direction in the fresh air channel 21a is a reference plane S1, a first angle and a second angle are provided between the adjusting plate 22 and the reference plane S1, and the adjusting plate 22 can be parked at any position between the first angle and the second angle, wherein the first angle is 0 °, and the second angle is 90 °. Exemplarily, when regulating plate 22 is in first angle, regulating plate 22 ends new trend passageway 21a, and when regulating plate 22 is in the second angle, the fresh air intake of new trend passageway 21a is the biggest, like this, can be through rotating regulating plate 22 to certain angle, can introduce the new trend of different volumes to make the quality index of room air reach the satisfied effect of user, user experience feels good.

For example, in an embodiment, referring to fig. 6 and 7, the fresh air ratio K can be adjusted by adjusting the rotation angle a of the adjusting plate 22;

K＝Q _new /Q _{General assembly}

Q _{Go into} ＝S _{Go into} V _Into

Q _New ＝S _New V _New

Q _{General assembly} ＝Q _New +Q _Into

S _New ＝2beP

Therefore, K = (2 bePV) _New )/(S _{Go into} V _Into +2bePV _New ) (1)

Q _{General assembly} Is the total intake air quantity, Q _New Is the intake air volume, Q, of the fresh air channel 21a _Into The air inlet quantity is 1g of the indoor air inlet S _{Go into} Is the area of the flow cross section of the indoor air inlet 1g, V _Into The air inlet speed S of the indoor air inlet 1g _New Is the area of the flow cross section of the fresh air channel 21a, V _New 2b and e are the dimensions of the flow cross section of the fresh air channel 21a, respectively, and P is the air inlet percentage of the air inlet amount of the fresh air channel 21a, wherein S is the air inlet speed _Into 、V _{Go into} And V _New For quantification, S _New Is a variable;

referring to the figure, P:

P＝2d/2d

the size of the adjusting plate 22 is matched with the size of the overflowing section of the fresh air channel 21a, so that the sizes of projection surfaces of the adjusting plate 22 along the fresh air flowing direction in the fresh air channel 21a are also 2b and e, and the adjusting plate 22 is in an axisymmetric structure with the rotation axis as a symmetry axis because the rotation axis of the adjusting plate 22 is overlapped with the center line of the adjusting plate;

d＝c*cosB

B＝(180°-A)/2

c＝2b*sin(A/2)

therefore, P =2sin (A/2) cos ((180 ° -A)/2) (2)

By solving the formula (2), the setting range of the rotation angle A of the adjusting plate 22 is 0-90 degrees, and the air inlet percentage P corresponding to the air inlet amount of the fresh air channel 21a is 0-100 percent;

in summary, by substituting the formula (2) into the formula (1), the relationship between the fresh air ratio K and the rotation angle a of the adjusting plate 22 is as follows:

K＝(4besin(A/2)cos((180°-A)/2)V _new )/(S _Into V _Into +4besin(A/2)cos((180°-A)/2)V _New ) (3)

According to the formula (3), the fresh air ratio K can be obtained according to the user setting or big data, and the optimum rotation angle a of the adjusting plate 22 ₁ The optimal fresh air proportion K can be obtained according to big data ₁ Obtaining by reverse thrust; similarly, the optimum rotation angle A of the adjusting plate 22 ₁ The air-conditioning indoor unit 100 can also be obtained by adjusting the sizes b and e of the flow cross-section of the fresh air channel 21a before the factory, or naturally, the air inlet area S of the indoor air inlet 1g can also be redesigned _Into To be acquired. Thus, the optimum rotation angle A of the adjusting plate 22 can be set ₁ To obtain the optimal fresh air proportion K ₁ And the air quality is ensured, the user experience is improved, and meanwhile, the energy-saving effect can be realized, and the purposes of energy conservation and emission reduction are achieved.

In one embodiment, the housing 1 has an indoor air inlet 1g communicated with the air duct 1a, and a ratio of an air intake rate of the fresh air duct 21a to a first air intake rate is between 0.05 and 0.1, wherein the first air intake rate is a sum of the air intake rate of the fresh air duct 21a and the air intake rate of the indoor air inlet 1g. For example, the ratio of the air intake of the fresh air channel 21a to the first air intake may be 0.05, 0.06, 0.07, 0.08, 0.09, or 0.1, and the like, so that by setting a suitable ratio of the air intake of the fresh air channel 21a to the first air intake, the air quality can be ensured, the user experience can be improved, the energy saving effect can be achieved, and the operation cost of the indoor unit 100 of the air conditioner can be reduced.

It can be understood that the ratio of the air intake volume of the fresh air channel 21a to the first air intake volume is the above fresh air ratio K.

In one embodiment, referring to fig. 3 to 5, the fresh air device 2 includes a synchronous motor 24, the synchronous motor 24 is disposed on the housing 21, and a motor shaft of the synchronous motor 24 is connected to the adjusting plate 22. Thus, the rotation angle of the adjusting plate 22 can be precisely controlled to increase the air intake ratio of the fresh air channel 21a.

Illustratively, in one embodiment, the motor shaft of the synchronous motor 24 is connected at the rotational axis of the adjustment plate 22. Thus, the rotation of the adjusting plate 22 can be smoother, the rotation is more stable, and the working stability is good.

Another aspect of the present embodiment provides an air conditioner, including the air conditioning indoor unit 100 in any one of the above embodiments.

According to the air conditioner provided by the embodiment, the fresh air device 2 is arranged on the shell 1, so that outdoor fresh air can be sent into a room, the indoor air quality is improved, and the use experience of a user is improved; through set up installation department 1b respectively on a plurality of different lateral walls of orientation, like this, alright with install new trend device 2 in the new trend mouth 1c department that the lateral wall of the difference of casing 1 formed to the installation scene of difference to dodge the structure, be convenient for install, the installation is nimble.

The air conditioner may further include an outdoor unit of an air conditioner.

The above description is only a preferred embodiment of the present application, and is not intended to limit the present application, and it is obvious to those skilled in the art that various modifications and variations can be made in the present application. All changes, equivalents, modifications, etc. that come within the spirit and scope of the disclosure are intended to be embraced therein.

Claims

1. An indoor unit of an air conditioner is characterized by comprising;

the air conditioner comprises a shell, a fan and a fan, wherein an air duct is formed in the shell, a local part of the side wall of the shell is configured to be an installation part, the installation parts are respectively configured on a plurality of side walls with different directions, the installation parts are disassembled and assembled to form a fresh air opening, and the fresh air opening is communicated with the air duct;

the fresh air device is arranged at the fresh air port.

2. An indoor unit of an air conditioner as claimed in claim 1, wherein at least a part of one of the side walls of the casing is configured as a shield plate which is detachably connected, the shield plate is a first air opening after being detached, a second air opening is formed in the other side wall of the casing, the shield plate can shield one of the first air opening and the second air opening, the other one of the first air opening and the second air opening is an indoor air inlet, and the indoor air inlet is communicated with the air duct.

3. An indoor unit of an air conditioner according to claim 2, wherein the attachment portion is formed on the shielding plate.

4. An indoor unit for an air conditioner according to claim 1, wherein the fresh air device includes:

5. An indoor unit of an air conditioner according to claim 4, wherein the casing is detachably attached to the casing.

6. An indoor unit of an air conditioner according to claim 4, wherein a rotation axis of the adjusting plate coincides with a center line thereof, a plane perpendicular to a flow direction of fresh air in the fresh air path is a reference plane, a first angle and a second angle are provided between the adjusting plate and the reference plane, the adjusting plate can be parked at any position between the first angle and the second angle, wherein the first angle is 0 ° and the second angle is 90 °.

7. The indoor unit of claim 4, wherein the casing has an indoor air inlet communicated with the air duct, and a ratio of an air inlet volume of the fresh air duct to a first air inlet volume is between 0.05 and 0.1, wherein the first air inlet volume is a sum of the air inlet volume of the fresh air duct and the air inlet volume of the indoor air inlet.

8. The indoor unit of claim 4, wherein the fresh air device comprises a synchronous motor, the synchronous motor is disposed on the casing, and a motor shaft of the synchronous motor is connected to the adjusting plate.

9. An indoor unit of an air conditioner according to claim 1, wherein the indoor unit of an air conditioner includes an air cleaning device provided in the duct.

10. An air conditioner characterized by comprising the indoor unit of an air conditioner according to any one of claims 1 to 9.