CN218065122U

CN218065122U - Indoor unit of air conditioner

Info

Publication number: CN218065122U
Application number: CN202222308696.7U
Authority: CN
Inventors: 张家栋; 孙合庆; 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: 2022-12-16
Anticipated expiration: 2032-08-30

Abstract

The utility model relates to an indoor unit of air conditioner belongs to air equipment technical field, and indoor unit of air conditioner includes: the air conditioner comprises a shell, an indoor heat exchanger, an axial flow fan and a first driving piece, wherein an indoor air inlet, a first air outlet and a second air outlet are arranged on the shell, a centrifugal air cavity and an axial flow air cavity are arranged in the centrifugal air cavity and are far away from one side of the indoor air inlet, the centrifugal air cavity is communicated with the indoor air inlet and the first air outlet, and the axial flow air cavity is communicated with the indoor air inlet and the second air outlet; the centrifugal air cavity is arranged in the shell and is positioned between the indoor heat exchanger and the centrifugal air cavity; is arranged in the centrifugal wind cavity; is arranged in the axial flow air cavity; the first centrifugal fan and the axial flow fan are arranged between the first centrifugal fan and the axial flow fan and are driven to rotate.

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 an apparatus for manually adjusting and controlling parameters such as temperature, humidity, and flow rate of ambient air in a building or a structure. An air conditioner generally includes an indoor unit and an outdoor unit.

Most of the existing air conditioners have a plurality of air outlets and supply air in multiple directions. The air conditioner is arranged with a plurality of air ducts. However, since the indoor heat exchanger is shared by a plurality of air ducts, the problems of uneven surface air speed and uneven heat exchange efficiency of the indoor heat exchanger can be caused, and the efficiency of the indoor heat exchanger cannot be fully exerted. Therefore, there is a need for an air conditioner capable of improving heat exchange efficiency.

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 indoor unit of an air conditioner, the first air inlet and the second air inlet of the first centrifugal fan and the axial flow fan respectively correspond to the indoor heat exchanger, so that the air speed passing through the indoor heat exchanger is uniform, and the heat exchange efficiency is improved.

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

the shell is provided with an indoor air inlet, a first air outlet and a second air outlet, and is internally provided with a centrifugal air cavity and an axial flow air cavity which is arranged on one side of the centrifugal air cavity far away from the indoor air inlet;

the indoor heat exchanger is arranged in the shell and is positioned between the indoor air inlet and the centrifugal air cavity;

the first centrifugal fan is arranged in the centrifugal air cavity;

the axial flow fan is arranged in the axial flow air cavity;

the first driving piece is arranged between the first centrifugal fan and the axial flow fan and drives the first centrifugal fan and the axial flow fan to rotate.

In some embodiments of the present application, the centrifugal fan further includes a mounting box, a casing is disposed in the mounting box, a first air duct is disposed in the casing, and the first centrifugal fan is disposed in the first air duct; a second ventilation channel is formed between the casing and the mounting box, and the axial flow fan is arranged in the second ventilation channel.

In some embodiments of the present application, the first centrifugal fan is disposed coaxially with the axial flow fan, and the first centrifugal fan is disposed between the axial flow fan and the indoor heat exchanger.

In some embodiments of the present application, the first driving member is a coaxial motor, the coaxial motor is disposed on the casing, and the first centrifugal fan and the axial fan are respectively connected to two output shafts of the coaxial motor.

In some embodiments of this application, the second air exit is seted up in one side that the casing deviates from indoor air intake, be provided with in the second air exit and block the grid.

In some embodiments of the present application, the housing is provided with a third air outlet; a second centrifugal fan is arranged at one end, far away from the first centrifugal fan, in the shell, and is provided with a third air inlet and a second air outlet, and the third air inlet faces the indoor heat exchanger; the second air outlet faces the third air outlet.

In some of the embodiments of the present application, the second centrifugal fan includes:

the mounting seat is provided with a mounting hole in a penetrating way;

the unidirectional centrifugal fan blade is arranged in the mounting hole;

and the second driving piece is arranged in the mounting hole and is used for driving the unidirectional centrifugal fan blades to rotate.

In some embodiments of the present application, the second air outlet is opened in a side wall of the mounting seat and is communicated with the mounting hole.

In some embodiments of the present application, the casing is detachably connected with an air exhaust member, and the first air exhaust opening is opened in the air exhaust member.

In some embodiments of this application, the piece of airing exhaust can dismantle connect in the top of casing, first exhaust mouth link up along vertical direction the piece of airing exhaust, the bottom of first exhaust mouth with centrifugal wind chamber intercommunication.

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 schematic longitudinal sectional view of an air conditioning indoor unit according to an embodiment of the present application;

fig. 4 is a front view of an air conditioning indoor unit according to an embodiment of the present application;

fig. 5 is a schematic structural view of an indoor heat exchanger according to an embodiment of the present application;

fig. 6 is a schematic transverse sectional view of an air conditioning indoor unit according to an embodiment of the present application;

fig. 7 is a side view of an air conditioning indoor unit according to an embodiment of the present application;

FIG. 8 is an exploded schematic view of a first centrifugal fan section according to an embodiment of the present application;

fig. 9 is an exploded schematic view of a part of the structure of a second centrifugal fan according to an embodiment of the present application;

fig. 10 is a schematic structural view of an adjusting member according to an embodiment of the present application.

In the above figures: 100. an indoor heat exchanger; 101. a first region; 102. a second region; 103. a third region; 200. mounting a box; 300. a housing; 400. a first centrifugal fan; 401. a first blade; 402. A first turntable; 500. an axial flow fan; 600. a coaxial motor; 700. a second centrifugal fan; 701. a unidirectional centrifugal fan blade; 7011. a second blade; 7012. a second turntable; 702. a mounting seat; 703. a connecting member; 704. a second driving member; 800. a first exhaust port; 900. a first air outlet; 110. a second air outlet; 120. an adjustment member; 130. and adjusting the air duct.

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 skilled 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," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate 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 will now be described in detail 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 the heat is released to the ambient 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 a condenser, the indoor air conditioning unit functions as a heater in a heating mode, and when the indoor heat exchanger is used as an indoor heat exchanger, the indoor air conditioning unit functions 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 4, 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, an indoor heat exchanger 100, an axial flow fan 500 and a first driving piece, wherein an indoor air inlet, a first exhaust port 800 and a second exhaust port are arranged on the shell, a centrifugal air cavity and an axial flow air cavity are arranged in the shell and are far away from one side of the indoor air inlet, the centrifugal air cavity is communicated with the indoor air inlet and the first exhaust port 800, and the axial flow air cavity is communicated with the indoor air inlet and the second exhaust port; the centrifugal air cavity is arranged in the shell and is positioned between the indoor air inlet and the centrifugal air cavity; is arranged in the centrifugal wind cavity; is arranged in the axial flow air cavity; is disposed between the first centrifugal fan 700 and the axial fan 500 and drives the first centrifugal fan 400 and the axial fan 500 to rotate.

Referring to fig. 2, 3 and 5, in some embodiments, the housing is vertically disposed, the indoor air inlet of the housing is a back surface of the housing, and a side of the housing facing away from the indoor air inlet is a front surface of the housing. The length direction of the indoor heat exchanger 100 is the same as the length direction of the casing, and the indoor heat exchanger 100 is divided into a first region 101 and a second region 102 along the length direction thereof from top to bottom. A first air inlet of the first centrifugal fan 400 corresponds to the first region 101 of the indoor heat exchanger 100, and a second air inlet of the axial fan 500 corresponds to the second region 102 of the indoor heat exchanger 100. When the first driving member is started, the first centrifugal fan 400 and the axial flow fan 500 are driven to rotate, and at this time, air passes through the first region 101 and the second region 102 of the indoor heat exchanger 100 and is output by the first centrifugal fan 400 and the axial flow fan 500. The air uniformly passes through the indoor heat exchanger 100, and the heat efficiency is improved.

Referring to fig. 1 to 7, in some embodiments, the first exhaust opening 800 is disposed at the top end of the housing, and the first exhaust opening 800 faces the first exhaust opening 800 vertically upward. The second air outlet sets up in the lateral wall of casing to make the orientation of first air outlet 800 and second air outlet different so that the output direction of air current is different, improve user experience.

Referring to fig. 2 and 8, in some embodiments, the indoor unit of an air conditioner further includes a mounting box 200, a casing 300 is disposed in the mounting box 200, a first air duct is disposed in the casing 300, and a first centrifugal fan 400 is disposed in the first air duct; a second air passage is formed between the casing 300 and the mounting box 200, and the axial fan 500 is disposed in the second air passage. The combination of the mounting box 200 and the chassis 300 forms a first air duct and a second air duct, which ensures that the air flow passing through the first area 101 and the air flow passing through the second area 102 are independent of each other, reduces the interference of the air flow, and improves the ventilation effect.

In some embodiments, the mounting box 200 is a rectangular box, and a side of the mounting box 200 facing the indoor heat exchanger 100 is open and covers the first area 101 and the second area 102. The first air path penetrates the cabinet 300, one end of the first air path faces the first region 101 of the indoor heat exchanger 100, and the other end of the first air path faces the first exhaust port 800. When the first driving member drives the first centrifugal fan 400 to rotate, the air enters the first air channel through the first region 101, and is output from the first exhaust opening 800 under the action of the first centrifugal fan 400.

In some embodiments, a first air outlet 900 is formed at a side of the mounting box 200 facing away from the indoor heat exchanger 100. The axial flow fan 500 outputs air through the first outlet opening 900.

In some embodiments, the bottom wall of the mounting box 200 and the side wall remote from the indoor heat exchanger 100 and the inner wall of the mounting box 200 form a second ventilation channel. One end of the second ventilation channel faces the second area 102 of the indoor heat exchanger 100, and the other end of the second ventilation channel penetrates through a side of the mounting box 200, which faces away from the indoor heat exchanger 100. When the first driving member drives the axial flow fan 500 to rotate, the air enters the second ventilation channel through the second area 102 and is output from the second exhaust port under the action of the axial flow fan 500.

In some embodiments, the first centrifugal fan 400 is disposed coaxially with the axial flow fan 500, and the first centrifugal fan 400 is disposed between the axial flow fan 500 and the indoor heat exchanger 100.

In some embodiments, the first centrifugal fan 400 is disposed inside the cabinet 300 toward an inner sidewall of the indoor heat exchanger 100, and the axial flow fan 500 is disposed on an outer sidewall of the cabinet 300 away from the indoor heat exchanger 100. The first centrifugal fan 400 is disposed in the front-rear direction of the housing in the axial direction.

In some embodiments, the first driving member is a coaxial motor 600, the coaxial motor 600 is disposed on the casing 300, and the first centrifugal fan 400 and the axial fan 500 are respectively connected to two output shafts of the coaxial motor 600.

In some embodiments, the body of the coaxial motor 600 is fixed to the outer side wall of the casing 300 facing away from the indoor heat exchanger 100, and the two output shafts are respectively disposed on two sides of the body. The first centrifugal fan 400 and the axial flow fan 500 are coaxially connected to the corresponding output shafts, respectively.

In some embodiments, the first centrifugal fan 400 includes a plurality of first blades 401 and a first rotating disk 402, the first rotating disk 402 is a circular disk and is coaxially fixed on a corresponding output shaft of the coaxial motor 600, the first blades 401 are fixed on an edge of the first rotating disk 402, and the plurality of first blades 401 are spaced apart along a circumferential direction of the first rotating disk 402, and a distance between any two adjacent first blades 401 is the same. When the first centrifugal fan 400 rotates, an air flow enters the region between the plurality of first blades 401, and the air is blown toward the radial direction of the first rotary disk 402 by the first blades 401.

In some embodiments, the second air outlet is opened at a side of the housing facing away from the indoor air inlet, and a blocking grille is arranged in the second air outlet. The barrier grill prevents the limbs of the person from contacting the axial flow fan 500 to cause injury.

In some embodiments, the grille includes a plurality of baffles, the baffles are rectangular plates and extend in the width direction of the housing, and both ends of the baffles are connected with the housing. The baffles are arranged at intervals along the length direction of the shell, and the distance between any two adjacent baffles is the same.

Referring to fig. 2 and 9, in some embodiments, the housing is provided with a third air outlet; a second centrifugal fan 700 is arranged at one end of the shell far away from the first centrifugal fan 400, the second centrifugal fan 700 is provided with a third air inlet and a second air outlet 110, and the third air inlet faces the indoor heat exchanger 100; the second outlet 110 faces the third outlet.

In some embodiments, the indoor heat exchanger 100 also has a third zone 103, and the second zone 102 is located between the first zone 101 and the third zone 103. When the second centrifugal fan 700 rotates, air is output through the second outlet 110 and the third outlet by the second centrifugal fan 700 through the third area 103.

In some embodiments, the second centrifugal fan 700 includes: the fan comprises a mounting seat 702, a one-way centrifugal fan blade 701 and a second driving piece 704, wherein a mounting hole penetrates through the mounting seat 702; wherein, the unidirectional centrifugal fan blade 701 is arranged in the mounting hole; the second driving member 704 is disposed in the mounting hole and is used for driving the unidirectional centrifugal fan blade 701 to rotate.

In some embodiments, mount 702 is a rectangular block, and mount 702 is disposed below mounting box 200. The mounting hole is a circular hole, and the mounting hole penetrates through the mounting base 702, and the axis of the mounting hole is parallel to the axis of the first centrifugal fan 400. The connecting member 703 is disc-shaped, the connecting member 703 is detachably connected to a side of the mounting base 702 away from the indoor heat exchanger 100, and the connecting member 703 is coaxially disposed with the mounting hole. The connection means of the connector 703 and the mounting base 702 include, but are not limited to, bolts, screws, snaps, buckles, and hasps. The second drive 704 includes, but is not limited to, an electric motor and a motor. The second driving member 704 is fixed to a side of the connection member 703 facing the indoor heat exchanger 100, and an output shaft of the second driving member 704 faces the indoor heat exchanger 100. The unidirectional centrifugal fan blade comprises a second rotary disk 7012 and a plurality of second blades 7011, the second rotary disk 7012 is a disk and is coaxially fixed on an output shaft of the second driving member 704, the second blades 7011 are fixed on the edge of the second rotary disk 7012, the second blades 7011 are arranged at intervals along the circumferential direction of the second rotary disk 7012, and the distance between any two adjacent second blades 7011 is the same. When the unidirectional centrifugal fan blade 701 rotates, the air flow enters the region between the plurality of second blades 7011, and the air is blown in the radial direction of the second rotating disk 7012 by the second blades 7011. The unidirectional centrifugal fan blades 701 are coaxially arranged in the mounting holes, the second driving part 704 drives the unidirectional centrifugal fan blades 701 to rotate, air enters the mounting holes after passing through the third area 103 of the indoor heat exchanger 100, and air flow is output through the second air outlet 110 and the third air outlet under the action of the unidirectional centrifugal fan blades 701.

In some embodiments, the third exhaust outlets have two openings respectively formed at two sides of the width of the housing. The second air outlet 110 is formed in the side wall of the mounting seat 702 and is communicated with the mounting hole; the number of the second air outlets 110 is the same as that of the third air outlets, and the second air outlets and the third air outlets correspond to each other.

In some embodiments, a wind deflector for adjusting a wind direction is disposed in the second wind outlet 110. The direction of the air current through the second air outlet can be adjusted by adjusting the angle of the air deflector, and the air deflector is adjusted according to requirements, so that the comfort level is improved.

In some embodiments, there are a plurality of air deflectors, and the air deflectors are spaced apart along the length direction of the second outlet 110, and the distance between any two adjacent second air deflectors is the same. The air deflector is a rectangular plate and is vertically arranged, the top of the air deflector is rotatably connected with the inner top wall of the second air outlet 110, and the bottom of the air deflector is rotatably connected with the inner bottom wall of the second air outlet 110.

In some embodiments, a connecting rod is disposed in each second air outlet 110, and the connecting rod is disposed along a length direction of the corresponding second air outlet 110. The connecting rods are hinged with the corresponding air deflectors, and when the connecting rods are pushed, the connecting rods drive all the air deflectors to turn over so as to adjust the angle corresponding to the second air outlet 110.

In some embodiments, a pushing member is disposed within the housing, and the pushing member includes, but is not limited to, a cylinder, a linear motor. The output end of the pushing piece is connected with the connecting rod. The indoor unit of the air conditioner further comprises a control panel, the pushing piece is electrically connected with the control panel, the control panel is pressed manually, and the control panel controls the pushing piece to push the connecting rod so as to control the angle of the air deflector. The pushing piece can be controlled to push the connecting rod through a remote controller.

In some embodiments, the indoor heat exchanger 100 is removably coupled to the housing. The indoor heat exchanger 100 is connected to the housing by means including, but not limited to, screws, snaps, buckles, and snaps. The indoor heat exchanger 100 can be taken out from the inside of the shell during maintenance, and manual maintenance is facilitated.

In some embodiments, the top of the housing is connected to the outside, the housing is detachably connected to an air exhaust member, and the first air exhaust opening 800 is formed in the air exhaust member.

In some embodiments, the air discharging member is detachably connected to the top end of the housing, the first air discharging opening 800 penetrates the air discharging member in the vertical direction, and the bottom end of the first air discharging opening 800 is communicated with the centrifugal air chamber.

In some embodiments, the casing further includes a base, the upper surface of the base and the lower surface of the air exhaust member are both provided with slots, and the top end and the bottom end of the indoor heat exchanger 100 are respectively inserted into the two slots to complete the setting of the indoor heat exchanger 100.

Referring to fig. 2 and 10, in some embodiments, the adjusting member 120 is disposed at the first exhaust opening 800, and the direction of the air outlet is adjusted by the adjusting member 120, so that the adjustment by the user is facilitated.

In some embodiments, the adjusting member 120 is a cylinder, and the adjusting member 120 is coaxially disposed above the first exhaust opening 800. The first exhaust opening 800 is a round opening, and the first exhaust opening 800 and the adjusting member 120 are coaxially arranged. The adjusting member 120 is provided with an adjusting air duct 130, one end of the adjusting air duct 130 penetrates through one side of the adjusting member 120 facing the first exhaust opening 800, and the other end of the adjusting air duct 130 penetrates through the outer peripheral wall of the adjusting member 120. The turning of the air flow is achieved by rotating the adjusting member 120.

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 centrifugal fan is arranged in the centrifugal air cavity;

the axial flow fan is arranged in the axial flow air cavity;

2. An indoor unit of an air conditioner according to claim 1, further comprising a mounting box, wherein a casing is provided in the mounting box, a first air duct is provided in the casing, and the first centrifugal fan is provided in the first air duct; a second ventilation channel is formed between the casing and the mounting box, and the axial flow fan is arranged in the second ventilation channel.

3. An indoor unit of an air conditioner according to claim 2, wherein the first centrifugal fan is provided coaxially with the axial flow fan, and the first centrifugal fan is provided between the axial flow fan and the indoor heat exchanger.

4. An indoor unit of an air conditioner as claimed in claim 2, wherein the first driving member is a coaxial motor disposed on the casing, and the first centrifugal fan and the axial flow fan are respectively connected to two output shafts of the coaxial motor.

5. An indoor unit of an air conditioner according to claim 4, wherein the second air outlet is provided on a side of the casing facing away from the indoor air inlet, and a blocking grill is provided in the second air outlet.

6. An indoor unit of an air conditioner according to any one of claims 1 to 5, wherein a third air outlet is formed in the casing; a second centrifugal fan is arranged at one end, far away from the first centrifugal fan, in the shell, and is provided with a third air inlet and a second air outlet, and the third air inlet faces the indoor heat exchanger; the second air outlet faces the third air outlet.

7. An indoor unit of an air conditioner according to claim 6, wherein the second centrifugal fan includes:

the mounting seat is provided with a mounting hole in a penetrating manner;

the unidirectional centrifugal fan blade is arranged in the mounting hole;

8. An indoor unit of an air conditioner as claimed in claim 7, wherein the second outlet is opened in a side wall of the installation base and communicates with the installation hole.

9. An indoor unit of an air conditioner according to any one of claims 1 to 5, wherein an air discharge member is detachably attached to the casing, and the first air discharge opening is provided in the air discharge member.

10. An indoor unit of an air conditioner according to claim 9, wherein the air discharge member is detachably attached to a top end of the casing, the first air discharge opening penetrates the air discharge member in a vertical direction, and a bottom end of the first air discharge opening is communicated with the centrifugal air chamber.