CN217876143U

CN217876143U - Indoor unit of air conditioner

Info

Publication number: CN217876143U
Application number: CN202222296034.2U
Authority: CN
Inventors: 孙合庆; 张家栋; 逯成林; 徐超
Original assignee: Hisense Air Conditioning Co Ltd
Current assignee: Hisense Air Conditioning Co Ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2022-11-22
Anticipated expiration: 2032-08-30

Abstract

The utility model relates to an indoor unit of air conditioner belongs to air conditioning equipment technical field, and indoor unit of air conditioner includes: the air conditioner comprises a shell, a fan, a first ventilation channel, a fresh air channel and a valve, wherein the shell is provided with an indoor air outlet; the fan is arranged in the shell and provided with an air outlet and a first air inlet, and the air outlet of the fan corresponds to the indoor air outlet of the shell; the first air channel is arranged in the shell, one end of the first air channel is communicated with a first air inlet of the fan, and the other end of the first air channel is communicated to the outside of the shell; the fresh air channel is arranged in the shell, and one end of the fresh air channel is communicated with the first air inlet of the fan; the other end of the fresh air channel is communicated to the outside of the shell; the valve is arranged inside the shell and used for opening or closing the first ventilation channel and the fresh air channel. The fresh air channel can be independently closed through the opening and closing valve, the first ventilation channel is independently closed, and the fresh air channel and the first ventilation channel can also be simultaneously opened to realize air mixing.

Description

Indoor unit of air conditioner

Technical Field

The utility model belongs to the technical field of air conditioning equipment, especially, relate to an indoor unit of 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 fresh air conditioner is a healthy and comfortable air conditioner with fresh air function, realizes the circulation and ventilation between room air and outdoor air by using a fan, and has the function of purifying air.

Conventional fresh air conditioner, air conditioner wind channel and fresh air channel are relatively independent, need two fans respectively, and not only occupation space leads to whole quick-witted size big, and a plurality of wind channel structures are complicated moreover, and are with high costs. Therefore, an air conditioner which is simple in structure, small in size, capable of reducing the cost of the whole machine and improving the assembly efficiency is urgently needed to be provided.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve one of the technical problem in the correlation technique at least to a certain extent.

Therefore, the application aims to provide an air conditioner indoor unit, a first ventilation channel and a fresh air channel can be opened and closed through a valve, switching and air mixing of two modes are achieved, and a fan does not need to be arranged independently.

In order to achieve the above object, the utility model provides an indoor unit of air conditioner, include:

the shell is provided with an indoor air inlet, an indoor air outlet and an outdoor air inlet;

the indoor heat exchanger is arranged in the shell and is positioned on the inner side of the indoor air inlet;

the fan is arranged in the shell and is provided with a fan air outlet and a first air inlet, and the fan air outlet corresponds to the indoor air outlet;

the first air channel is arranged in the shell and is communicated with the indoor air inlet;

the fresh air channel is arranged in the shell and is communicated with the outdoor air inlet;

the valve is arranged in the shell and provided with a first position, a second position and a third position, when the valve is at the first position, the first ventilating duct is communicated with the first air inlet, and the fresh air channel is isolated from the first air inlet, and when the valve is at the second position, the first ventilating duct is isolated from the first air inlet, and the fresh air channel is communicated with the first air inlet; when the valve is located at the third position, the first ventilation channel and the fresh air channel are communicated with the first air inlet.

In some embodiments of the present application, the fan has a second air inlet, a second air passage communicated with the indoor air inlet is disposed in the casing, and the second air passage is communicated with the second air inlet.

In some embodiments of the present application, the valve comprises:

the baffle is connected to the shell;

and the driving piece is connected with the baffle and drives the baffle to rotate so as to switch the valve among the first position, the second position and the third position.

In some embodiments of the present application, an air mixing cavity communicated with the first air inlet is disposed in the housing, when the valve is in the first position, the first air channel is communicated with the air mixing cavity and the fresh air channel is isolated from the air mixing cavity, and when the valve is in the second position, the first air channel is isolated from the air mixing cavity and the fresh air channel is communicated with the air mixing cavity; when the valve is located at the third position, the first ventilation channel and the fresh air channel are communicated with the air mixing cavity.

In some embodiments of the present application, a first communicating opening that communicates the first air inlet and the first air channel and a second communicating opening that communicates the first air inlet and the fresh air channel are formed on the casing.

In some embodiments of the present application, the valve has one baffle or two baffles, when the valve has one baffle, the baffle is connected between the first communicating opening and the second communicating opening, the driving member drives the baffle to close or open the first communicating opening or the second communicating opening, when the valve has two, the driving member drives the two baffles to close or open the first communicating opening and the second communicating opening respectively.

In some embodiments of the present disclosure, the fan is a duplex centrifugal fan, and the first air inlet and the second air inlet are respectively located at two ends of the duplex centrifugal fan.

In some embodiments of the present application, the fresh air channel includes a fresh air pipe and a fresh air cavity, the fresh air pipe is communicated with the fresh air cavity, and the fresh air pipe extends to one side of the back of the casing to the outside of the casing; the fresh air pipe is communicated with the outside; the fresh air cavity is communicated with the air mixing cavity.

In some embodiments of this application, indoor air outlet set up in the top of casing, first ventiduct with new trend passageway all is located the below of fan.

In some embodiments of the present application, the number of the valves is two, and the two valves respectively control the opening and closing of the first ventilation duct and the opening and closing of the fresh air channel.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic view of the overall structure of an air conditioning indoor unit according to an embodiment of the present application;

fig. 2 is a schematic cross-sectional view of an air conditioning indoor unit according to an embodiment of the present application;

fig. 3 is a partially exploded schematic view of an air conditioning indoor unit according to an embodiment of the present application;

fig. 4 is a schematic cross-sectional view of an air conditioning indoor unit according to an embodiment of the present application;

fig. 5 is a schematic partial cross-sectional view of an air conditioning indoor unit according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a duplex centrifugal fan according to an embodiment of the present application;

FIG. 7 is an exploded view of a duplex centrifugal fan according to an embodiment of the present application;

fig. 8 is a plan view of an air conditioning indoor unit according to an embodiment of the present application;

fig. 9 is a side view of an air conditioning indoor unit according to an embodiment of the present application;

fig. 10 is a schematic view of another perspective of an air conditioning indoor unit according to an embodiment of the present application.

In the above figures: 100. an indoor air outlet; 200. a first air duct; 300. a fresh air channel; 301. a fresh air duct; 302. a fresh air cavity; 400. a valve; 401. a baffle plate; 402. a servo motor; 500. a duplex centrifugal fan; 501. a first air inlet; 502. a second air inlet; 503. an air outlet; 600. a mixed air cavity; 700. and a second ventilation channel.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the present application, an air conditioner performs a refrigeration cycle of an indoor unit of the air conditioner by using a compressor, a condenser, an expansion valve, and an indoor heat exchanger. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged. The compressor compresses a refrigerant gas in a low-temperature and low-pressure state and discharges the refrigerant gas in a high-temperature and high-pressure state. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process. The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The indoor heat exchanger evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The indoor heat exchanger may achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioning indoor unit can adjust the temperature of the indoor space throughout the cycle. The outdoor unit of the air conditioning indoor unit refers to a portion of the refrigeration cycle including the compressor and the outdoor heat exchanger, the indoor unit of the air conditioning indoor unit includes the indoor heat exchanger, and the expansion valve may be provided in the indoor unit or the outdoor unit. The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an indoor heat exchanger. When the indoor heat exchanger is used as the condenser, the indoor air conditioning unit is used as a heater in a heating mode, and when the indoor heat exchanger is used as the indoor heat exchanger, the indoor air conditioning unit is used as a cooler in a cooling mode.

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, in an exemplary embodiment of the indoor unit of an air conditioner of the present invention, the indoor unit of an air conditioner includes: the air conditioner comprises a shell, a fan, a first ventilation channel 200, a fresh air channel 300 and a valve 400, wherein the shell is provided with an indoor air outlet 100; the fan is arranged in the shell and is provided with an air outlet 503 and a first air inlet 501, and the air outlet 503 of the fan corresponds to the indoor air outlet 100 of the shell; the first air duct 200 is arranged in the housing, one end of the first air duct 200 is communicated with the first air inlet 501 of the fan, and the other end of the first air duct 200 is communicated to the outside of the housing; the fresh air channel 300 is arranged in the shell, and one end of the fresh air channel 300 is communicated with the first air inlet 501 of the fan; the other end of the fresh air channel 300 is communicated to the outside of the shell; the valve 400 is arranged inside the shell, the valve 400 has a first position, a second position and a third position, when the valve 400 is at the first position, the first ventilation channel 200 is communicated with the first air inlet 501 and the fresh air channel is isolated from the first air inlet 501, and when the valve 400 is at the second position, the first ventilation channel 200 is isolated from the first air inlet 501 and the fresh air channel is communicated with the first air inlet 501; when the valve 400 is in the third position, the first ventilation channel 200 and the fresh air channel are both communicated with the first air inlet 501.

In some embodiments, the indoor air outlet 100 is disposed at the top of the housing, and the first air duct 200 and the fresh air duct 300 are both located below the fan.

In some embodiments, the housing is vertically disposed, a mounting plate is disposed within the housing, and the fan is disposed on the mounting plate. The mounting panel level sets up, and fan demountable installation can pull down the fan when the fan damages and change in the upper surface of mounting panel, convenient operation. The mounting panel sets up with casing integrated into one piece, and the joint strength between mounting panel and the casing is high, is difficult to damage.

In some embodiments, the fan has a second air inlet 502, a second air passage 700 is disposed in the housing, the second air passage 700 is communicated with the second air inlet 502 of the fan, and the other end of the second air passage 700 is communicated to the outside of the housing. The first air duct 200 and the second air duct 700 communicate with the first air inlet 501 and the second air inlet 502, respectively. When the fan is operated, the air flow passes through the first air duct 200 and the second air duct 700, and is blown out from the indoor air outlet 100 of the housing by the fan through the first air inlet 501 and the second air inlet 502, respectively. The speed of ventilation is improved.

Referring to fig. 5, 6 and 7, in some embodiments, the fan is a duplex centrifugal fan 500, an axis of the duplex centrifugal fan 500 is perpendicular to a height direction of the housing, and the first air inlet 501 and the second air inlet 502 are respectively located at two ends of the duplex centrifugal fan 500. The duplex centrifugal fan 500 has a large power and can be supplied with air from both ends.

In some embodiments, the duplex centrifugal fan 500 includes an annular housing, a plurality of blades, and a motor, wherein an output shaft of the motor is connected to the housing, the plurality of blades is formed by a plurality of blades, the plurality of blades are spaced around the output shaft, and a distance between any two adjacent blades is the same. The blades and the output shaft are arranged in an inclined mode in the radial direction, and therefore when the blades rotate around the output shaft of the motor, the blades can drive airflow to be far away from the output shaft. When the motor rotates reversely, the plurality of blades drive the airflow to be close to the output shaft. The plurality of blades are connected with the body of the motor. The inner peripheral wall of the casing is provided with an air duct, and the casing is provided with an opening communicated with the indoor air outlet 100 of the casing. The wind of the duplex centrifugal fan 500 enters the wind groove and is output from the indoor wind outlet 100 of the shell through the opening of the shell, and the wind of the duplex centrifugal fan 500 is gathered and output through the shell, so that the wind speed and the flow are improved, and the energy waste is reduced.

In some embodiments, the motor is disposed on the housing, and the plurality of blades are connected to an output shaft of the motor.

In some embodiments, the first air channel 200, the fresh air channel 300, and the second air channel 700 all penetrate the back of the housing; the second air inlet 502 of the duplex centrifugal fan 500 faces the back of the housing.

Referring to fig. 1 to 10, in some embodiments, the axial direction of the duplex centrifugal fan 500 is arranged along the front-rear direction of the casing. The first air inlet 501 is disposed at an end of the duplex centrifugal fan 500 facing the front of the housing, and the second air inlet 502 is disposed at an end of the duplex centrifugal fan 500 facing the back of the housing. The second ventilation channel 700 directly penetrates through the back of the housing and is directly communicated with the second air inlet 502 of the duplex centrifugal fan 500.

In some embodiments, the first air duct 200 communicates with the first air inlet 501 through the bottom of the duplex centrifugal fan 500. The first air path 200 and the second air path 700 have a space therebetween.

In some embodiments, the second air inlet 502 of the duplex centrifugal fan 500 is directly communicated with the outside, and the air directly enters the second air inlet 502 and is output by the duplex centrifugal fan 500.

In some embodiments, the first air channel 200 and the fresh air channel 300 are separated by a partition, and the valve 400 includes a baffle 401 and a driving member for driving the baffle 401 to turn so as to switch the valve 300 between the first position, the second position and the third position.

In some embodiments, the valve 400 is disposed on the partition, and the baffle 401 is driven by the driving member to block the first air duct 200 or the fresh air duct 300. The driving part is preferably a servo motor 402, and the servo motor 402 drives the baffle 401 to overturn, so that the control of the angle is accurate and stable.

In some embodiments, the air conditioner indoor unit further includes a control panel disposed inside the casing. The servo motor 402 is electrically connected with the control panel, and the servo motor 402 can be started through the control panel to turn over the baffle 401, so that the opening and closing of the fresh air channel 300 or the first air duct 200 are controlled, and different functions are switched. In some embodiments, the indoor unit of the air conditioner further includes a remote controller, the remote controller transmits the electric signal to the control panel, and the control panel controls the servo motor 402 to start, so that the function switching can be realized remotely.

In some embodiments, the valve 400 is manually controlled, a handle is disposed on the baffle 401, and the handle is manually pushed or rotated to turn the baffle 401, so as to control the baffle 401 to open, close or half open the fresh air channel 300 and the first air duct 200.

In some embodiments, the first air duct 200 and the fresh air duct 300 are respectively provided with a valve 400, and the function switching is realized by manually controlling any valve 400. When the valve 400 of the first air duct 200 is closed, the valve 400 of the fresh air duct 300 is opened, which is the fresh air mode. When the valve 400 of the first air duct 200 is opened and the valve 400 of the fresh air duct 300 is closed, the ventilation mode, the cooling mode or the heating mode is performed. The second is the mixing mode when both valves 400 are open.

In some embodiments, the valve 400 is a ball valve, and the ball valve is disposed at a junction of the first air duct 200 and the fresh air duct 300, and the switching between the different modes is realized by controlling a valve core of the ball valve.

In some embodiments, an indoor heat exchanger is provided inside the housing, and air passes through the indoor heat exchanger into the first air path 200 and the second air path 700.

In some embodiments, the indoor heat exchanger is disposed at the back of the casing, and air is blown out by the duplex centrifugal fan 500 after being heated or cooled by the indoor heat exchanger, so as to change the indoor temperature. Wherein the outdoor air is blown out by the fan through the fresh air channel 300.

In some embodiments, an air mixing cavity 600 communicated with the first air inlet 501 is arranged in the housing, when the valve 400 is in the first position, the first air duct 200 is communicated with the air mixing cavity 600 and the fresh air channel is isolated from the air mixing cavity 600, and when the valve 400 is in the second position, the first air duct 200 is isolated from the air mixing cavity 600 and the fresh air channel 300 is communicated with the air mixing cavity 600; when the valve 400 is in the third position, the first air duct 200 and the fresh air duct are both communicated with the air mixing chamber 600.

In some embodiments, the air mixing chamber 600 is disposed at the front side of the inside of the casing, and the air mixing chamber 600 is rectangular and is located at the first air inlet 501 of the duplex centrifugal fan 500. The baffle is horizontal setting and is located the bottom of mixing wind chamber 600, mixes wind chamber 600 and is located the top of new trend passageway 300 tip. The openings of the fresh air channel 300, the first ventilation duct 200 and the air mixing cavity 600 are rectangular, and the two openings are the same in size. An end of the first air path 200 toward the front of the case communicates with the air mixing chamber 600. When the baffle 401 overturns vertically upwards, the baffle 401 seals the first air duct 200, and the air flow in the first air duct 200 cannot enter the air mixing cavity 600 at the moment, which is in a fresh air mode. When baffle 401 is the level, baffle 401 seals new trend passageway 300, and the air current in the new trend passageway 300 can't get into and mix wind chamber 600 this moment, is the ventilation mode this moment. When the baffle 401 is inclined, the first air duct 200 and the fresh air channel 300 are not blocked, and the air flow of the first air duct 200 and the fresh air channel 300 enters the air mixing cavity 600 to be mixed and then is blown out by the duplex centrifugal fan 500, which is in an air mixing mode at this time.

In some embodiments, the first air path 200 is formed by a combination of shapes of the inside of the housing.

In some embodiments, the partition board and the mounting plate are horizontally disposed, and the mounting plate is located right above the partition board, and the partition board, the mounting plate and two inner side walls of the housing form the first air duct 200. Need not additionally be provided with the pipeline, practice thrift cost and convenience.

In some embodiments, the fresh air channel 300 comprises a fresh air pipe 301 and a fresh air cavity 302, the fresh air pipe 301 is communicated with the fresh air cavity 302, and the fresh air pipe 301 extends out of the housing towards one side of the back of the housing; the fresh air pipe 301 is communicated with the outside; the fresh air cavity 302 is communicated with the air mixing cavity 600.

In some embodiments, the first air path 200 is a rectangular duct, and the mounting plate and the partition plate are top and bottom walls of the rectangular duct, respectively. The fresh air chamber 302 is a rectangular box with an open upper surface, and the partition board of the first air duct 200 blocks part of the opening of the fresh air chamber 302. The air mixing cavity 600 is a rectangular box body, the top of one side of the air mixing cavity 600, which faces the duplex centrifugal fan 500, is connected with the casing, and the bottom of the air mixing cavity 600 is communicated with the part of the fresh air cavity 302 which is not shielded by the partition plate; the bottom end of the air mixing chamber 600 facing the side of the duplex centrifugal fan 500 is communicated with the first air duct 200. Baffle 401 articulates the baffle towards the preceding one side of casing, and baffle 401 is the horizontal setting with the hinge line of baffle.

In some embodiments, a first communication port communicating the first air inlet and the first air channel 200 and a second communication port communicating the first air inlet and the fresh air channel 300 are formed on the housing.

In some embodiments, the connection between the first air duct 200 and the air mixing chamber 600 is a first communication port. The joint of the fresh air cavity 302 and the air mixing cavity 600 is a second communication port.

In some embodiments, the valve 400 has one baffle 401 or two baffles 401, when the valve 400 has one baffle 401, the baffle 401 is connected between the first communication port and the second communication port, the driving member 402 drives the baffle 401 to close or open the first communication port or the second communication port, and when the valve 400 has two baffles, the driving member 402 drives the two baffles 401 to close or open the first communication port and the second communication port, respectively.

In some embodiments, the first air duct 200, the fresh air chamber 302 and the air mixing chamber 600 are detachably connected.

In some embodiments, the first air duct 200, the fresh air chamber 302 and the air mixing chamber 600 are integrally formed.

In some embodiments, the fresh air duct 301 is a circular duct, the fresh air cavity 302 is located below the partition plate, the fresh air cavity 302 is communicated with the air mixing cavity 600, and an opening of the fresh air cavity 302 communicated with the air mixing cavity 600 is blocked by the baffle 401. The fresh air duct 301 penetrates the back of the housing and extends outside the housing. In some embodiments, the fresh air pipes 301 are connected to the outside, and when the air conditioner is operated, outdoor air is blown to the inside of the room by the duplex centrifugal fan 500 through the fresh air pipes 301, so that a fresh air function is realized.

In some embodiments, the indoor air outlet 100 is directly opened on the top surface of the housing, and the indoor air outlet 100 is communicated with the air duct of the upper housing of the duplex centrifugal fan 500.

In some embodiments, the top of the casing is communicated with the indoor, the top of the casing is provided with an air outlet, and the indoor air outlet 100 is opened on the air outlet. The air outlet piece is detachably connected with the shell. The connection mode of the air outlet member and the casing includes, but is not limited to, a bolt, a buckle, a plug, a screw or a rivet.

In some embodiments, the fan is comprised of two axial fans. The first air inlet 501 and the second air inlet 502 correspond to two axial fans respectively, and the air outlets 503 of the two axial fans face the indoor air outlet 100 of the housing together. An axial fan corresponding to the first air path 200 is provided in the first air path 200.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. An air conditioning indoor unit, characterized in that, it includes:

the first ventilating duct is arranged in the shell and is communicated with the indoor air inlet;

the valve is arranged in the shell and provided with a first position, a second position and a third position, when the valve is positioned at the first position, the first ventilating channel is communicated with the first air inlet, and the fresh air channel is isolated from the first air inlet, and when the valve is positioned at the second position, the first ventilating channel is isolated from the first air inlet, and the fresh air channel is communicated with the first air inlet; when the valve is located at the third position, the first ventilating channel and the fresh air channel are communicated with the first air inlet.

2. An indoor unit of an air conditioner as claimed in claim 1, wherein the fan has a second air inlet, and a second ventilation path communicating with the indoor air inlet and the second air inlet is provided in the casing.

3. An indoor unit of an air conditioner according to claim 1, wherein the valve includes:

the baffle is connected to the shell;

4. The indoor unit of claim 1, wherein an air mixing chamber communicating with the first air inlet is provided in the casing, the first air duct communicates with the air mixing chamber and the fresh air channel is isolated from the air mixing chamber when the valve is in the first position, and the first air duct is isolated from the air mixing chamber and the fresh air channel communicates with the air mixing chamber when the valve is in the second position; when the valve is located at the third position, the first ventilation channel and the fresh air channel are communicated with the air mixing cavity.

5. An indoor unit of an air conditioner according to claim 3, wherein a first communication port communicating the first air inlet and the first air path and a second communication port communicating the first air inlet and the fresh air path are formed in the casing.

6. An indoor unit of an air conditioner according to claim 5, wherein the valve has one shutter or two shutters, and when the valve has one shutter, the shutter is connected between the first communication port and the second communication port, and the driving member drives the shutter to close or open the first communication port or the second communication port, and when the valve has two shutters, the driving member drives the two shutters to close or open the first communication port and the second communication port, respectively.

7. An indoor unit of an air conditioner according to claim 2, wherein the fan is a duplex centrifugal fan, and the first air inlet and the second air inlet are respectively provided at both ends of the duplex centrifugal fan.

8. The indoor unit of claim 4, wherein the fresh air channel comprises a fresh air duct and a fresh air chamber, the fresh air duct is communicated with the fresh air chamber, and the fresh air duct extends out of the casing toward one side of the back of the casing; the fresh air pipe is communicated with the outside; the fresh air cavity is communicated with the air mixing cavity.

9. An indoor unit of an air conditioner according to any one of claims 1 to 8, wherein the indoor air outlet is provided at a top of the casing, and the first air path and the fresh air path are both located below the fan.

10. An indoor unit of an air conditioner according to any one of claims 1 to 8, wherein two valves are provided, and the two valves respectively control opening and closing of the first air duct and opening and closing of the fresh air duct.