CN217876160U

CN217876160U - Indoor unit of air conditioner

Info

Publication number: CN217876160U
Application number: CN202222296035.7U
Authority: CN
Inventors: 孙合庆; 张家栋; 逯成林
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: this machine in air conditioning includes: the air conditioner comprises a shell, an indoor heat exchanger, a first fan and a second fan, wherein the shell is provided with an indoor air inlet positioned on the side part of the shell; the indoor heat exchanger is arranged in the shell and positioned on the inner side of the indoor air inlet, and comprises a first heat exchange section, a second heat exchange section and a third heat exchange section which are sequentially arranged along the longitudinal direction; the first fan is arranged in the shell and is provided with a first air inlet and a second air inlet; the first air inlet corresponds to a first heat exchange section of the indoor heat exchanger; the air inlet channel is formed in the shell, one end of the air inlet channel corresponds to the second heat exchange section of the indoor heat exchanger, the other end of the air inlet channel is communicated with the second air inlet of the first fan, and the air inlet channel passes through the lower part of the first fan; the second fan is arranged in the shell and is provided with a third air inlet, and the third air inlet corresponds to a third heat exchange section of the indoor heat exchanger.

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. 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 an urgent 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 the indoor unit of the air conditioner, the first air inlet and the second air inlet of the first fan and the third air inlet of the second fan correspond to the first heat exchange section, the second heat exchange section and the third heat exchange section of the indoor heat exchanger, the effect of fully utilizing the indoor heat exchanger is achieved, and the problem is solved.

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

the air conditioner comprises a shell, wherein an indoor air inlet communicated with the outside is formed in one side of the shell;

the indoor heat exchanger is arranged inside the shell, is close to the indoor air inlet and is divided into a first heat exchange section, a second heat exchange section and a third heat exchange section along the length direction of the indoor heat exchanger;

a first fan having a first air inlet and a second air inlet; the first air inlet corresponds to a first heat exchange section of the indoor heat exchanger;

one end of the air inlet channel corresponds to the second heat exchange section of the indoor heat exchanger, the other end of the air inlet channel is communicated with the second air inlet of the first fan, and the air inlet channel passes through the lower part of the first fan;

and the second fan is provided with a third air inlet, and the third air inlet corresponds to a third heat exchange section of the indoor heat exchanger.

In some embodiments of the present disclosure, the first fan is a duplex centrifugal fan, and the first air inlet and the second air inlet are two ends of the duplex centrifugal fan respectively; the shell is provided with a first exhaust port, the duplex centrifugal fan is provided with a first air outlet, and the first air outlet corresponds to and is communicated with the first exhaust port.

In some embodiments of the present application, a direction of the casing away from the indoor air inlet is a front direction, and an axial direction of the duplex centrifugal fan is arranged along the front direction of the casing; the second air inlet deviates from the indoor air inlet, and the air inlet channel is communicated with the second air inlet through the lower part of the duplex centrifugal fan.

In some embodiments of the present application, the air inlet channel includes:

the air inlet pipe is arranged in the shell and arranged along the front direction of the shell; the air inlet pipe is arranged between the first fan and the second fan, and one end of the air inlet pipe corresponds to the second heat exchange section of the indoor heat exchanger;

and the connecting box is arranged on one side of the duplex centrifugal fan, which deviates from the indoor air inlet, and the end of the air inlet pipe, which deviates from the indoor air inlet, is communicated with the second air inlet of the duplex centrifugal fan.

In some embodiments of the present invention, the duplex centrifugal fan is mounted on an outer wall of the air inlet pipe facing away from the second fan.

In some embodiments of the present application, the second fan is a unidirectional centrifugal fan, and the third air inlet is an end of the unidirectional centrifugal fan facing the indoor air inlet.

In some embodiments of the present application, the unidirectional centrifugal fan comprises:

the connecting piece is detachably connected to the shell;

the driving piece is arranged on the connecting piece;

the centrifugal fan blades are arranged between the connecting piece and the indoor heat exchanger, and the driving piece drives the centrifugal fan blades to rotate.

In some embodiments of the present application, the casing is provided with a second air outlet, and the second air outlet is disposed on two sides of the unidirectional centrifugal fan.

In some embodiments of the present application, air deflectors are disposed at the second air outlets.

In some embodiments of the present application, the indoor heat exchanger is detachably connected to the housing.

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 front view of an air conditioning indoor unit according to an embodiment of the present application;

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

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

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

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

FIG. 8 is a schematic diagram of a twin centrifugal fan according to an embodiment of the present application;

fig. 9 is a schematic structural view of a unidirectional centrifugal fan according to an embodiment of the present application;

fig. 10 is an exploded structure view of a unidirectional centrifugal fan according to an embodiment of the present application.

In the above figures: 100. an indoor heat exchanger; 101. a first heat exchange section; 102. a second heat exchange section; 103. a third heat exchange section; 200. a duplex centrifugal fan; 201. a first air inlet; 202. a second air inlet; 203. a housing; 204. a blade; 300. a unidirectional centrifugal fan; 301. a connecting member; 302. a drive member; 303. centrifuging the fan blades; 304. a third air inlet; 400. an air inlet channel; 401. an air inlet pipe; 402. a connecting box; 500. an air deflector; 600. a first exhaust opening.

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 orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but 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 invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; 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, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. 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 "under," "beneath," and "under" a second feature may be directly under or obliquely under the second 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

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, an indoor heat exchanger 100, a first fan and a second fan, wherein the shell is provided with an indoor air inlet at the side part of the shell; the indoor heat exchanger 100 is arranged in the shell and is positioned on the inner side of the indoor air inlet, and the indoor heat exchanger 100 comprises a first heat exchange section 101, a second heat exchange section 102 and a third heat exchange section 103 which are sequentially arranged along the longitudinal direction; the first fan is arranged in the shell and is provided with a first air inlet 201 and a second air inlet 202; the first air inlet 201 corresponds to the first heat exchange section 101 of the indoor heat exchanger 100; the air inlet channel 400 is formed in the shell, one end of the air inlet channel 400 corresponds to the second heat exchange section 102 of the indoor heat exchanger 100, the other end of the air inlet channel 400 is communicated with the second air inlet 202 of the first fan, and the air inlet channel 400 passes through the lower part of the first fan; the second fan is disposed in the casing and has a third air inlet 304, and the third air inlet 304 corresponds to the third heat exchange section 103 of the indoor heat exchanger 100. When the first fan and the second fan are turned on, air enters the first air inlet 201 and the second air inlet 202 through the first heat exchange section 101 and the second heat exchange section 102, respectively, and is discharged, and air passes through the third air inlet 304 through the third heat exchange section 103 and is discharged. Air can pass through the indoor heat exchanger 100 at a constant speed, and heat exchange efficiency is guaranteed.

In some embodiments, the air intake channel 400 is an entire duct.

With continued reference to fig. 1-7, in some embodiments, the housing is vertically disposed, the indoor air inlet of the housing is a back side of the housing, and a side of the housing away from the indoor air inlet is a front side of the housing. The length direction of the indoor heat exchanger 100 is the same as the length direction of the casing, the first heat exchange section 101 is located above the second heat exchange section 102, and the third heat exchange section 103 is located below the second heat exchange section 102. The first fan is positioned above the second fan.

Referring to fig. 2 and 8, in some embodiments, the first fan is a duplex centrifugal fan 200, and the first air inlet 201 and the second air inlet 202 are two ends of the duplex centrifugal fan 200 respectively; the casing is provided with a first exhaust opening 600, the duplex centrifugal fan 200 is provided with a first air outlet, and the first air outlet and the first exhaust opening 600 correspond to each other and are communicated with each other. The rotation shaft of the duplex centrifugal fan 200 is disposed along the front-rear direction of the housing.

In some embodiments, the duplex centrifugal fan 200 includes an annular housing 203, fan blades, and a motor, wherein an output shaft of the motor is connected to the housing 203, the fan blades are composed of a plurality of blades 204, the plurality of blades 204 are spaced around the output shaft, and a distance between any two adjacent blades 204 is the same. The blades 204 are inclined from the radial direction of the output shaft, so that when the blades 204 rotate around the output shaft of the motor, the air flow is driven to be far away from the output shaft. When the motor rotates in reverse, the plurality of blades 204 drive the airflow toward the output shaft. A plurality of blades 204 are connected to the body of the motor. The air duct is opened to the internal perisporium of casing 203, and casing 203 is seted up the opening and is communicated with the first exhaust opening 600 of casing. The wind of the duplex centrifugal fan 200 enters the wind groove and is output from the first wind outlet 600 of the shell through the opening of the shell 203, and the wind of the duplex centrifugal fan 200 is gathered and output through the shell 203, 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 203, and the plurality of blades are connected to an output shaft of the motor.

In some embodiments, the direction of the casing away from the indoor air inlet is a front direction, and the axial direction of the duplex centrifugal fan 200 is arranged along the front direction of the casing; the second air inlet 202 is away from the indoor air inlet, and the air inlet channel 400 is communicated with the second air inlet 202 through the lower part of the duplex centrifugal fan 200.

In some embodiments, the first air inlet 201 of the duplex centrifugal fan 200 is facing the first heat exchange section 101 of the indoor heat exchanger 100, and the first air outlet is vertically upward. First exhaust opening 600 sets up directly over the casing, and first exhaust opening 600 is located the top of first air outlet, consequently exports through first exhaust opening 600 behind the effect of first pair centrifugal fan 200 air through first air outlet.

Referring to fig. 1 to 7, in some embodiments, the air inlet channel 400 includes: an air inlet pipe 401 and a connection box 402, wherein the air inlet pipe 401 is arranged in the shell, the air inlet pipe 401 is arranged between the first fan and the second fan, and the air inlet pipe 401 is arranged along the front direction of the shell; one end of the air inlet pipe 401 corresponds to the second heat exchange section 102 of the indoor heat exchanger 100; the connection box 402 is disposed on one side of the duplex centrifugal fan 200 deviating from the indoor air inlet, and the connection box 402 communicates one end of the air inlet pipe 401 deviating from the indoor air inlet with the second air inlet 202 of the duplex centrifugal fan 200.

In some embodiments, the second air inlet 202 faces away from the indoor heat exchanger 100, the air inlet pipe 401 is a rectangular pipe, the connection box 402 is a rectangular box and is open towards one side of the duplex centrifugal fan 200, and the upper side of the opening of the connection box 402 is communicated with the second air inlet 202 of the duplex centrifugal fan 200. The lower part of the opening of the connecting box 402 is communicated with an air inlet pipe 401. Therefore, the air passes through the second heat exchange section 102 of the indoor heat exchanger 100 and then enters the second air inlet 202 of the duplex centrifugal fan 200 through the air inlet pipe 401 and the connecting box 402. The duplex centrifugal fan 200 discharges the air entering the first air inlet 201 and the second air inlet 202 from the first air outlet.

In some embodiments, the air inlet duct 401 and the junction box 402 are separate pieces, and the junction box 402 is removably attached to the air inlet duct 401. Therefore, when the duplex centrifugal fan 200 needs to be overhauled and maintained, the connecting box 402 can be opened to maintain the duplex centrifugal fan 200, and manual operation is facilitated.

In some embodiments, the air inlet duct 401 and the junction box 402 are integrally formed as one piece. The air inlet duct 401 can be part of the housing to improve the strength of the connection between the air inlet duct 401 and the housing.

In some embodiments, the twin centrifugal fan 200 is mounted to the outer wall of the air inlet duct 401 facing away from the second fan.

In some embodiments, the duplex centrifugal fan 200 is positioned on top of the air inlet duct 401, and the duplex centrifugal fan 200 is removably attached to the air inlet duct 401. The air inlet pipe 401 can also serve the purpose of installing the duplex centrifugal fan 200, so that the applicability is improved, and the cost is saved.

Referring to fig. 1 to 7, in some embodiments, the second fan is a unidirectional centrifugal fan 300, and the third air inlet 304 is an end of the unidirectional centrifugal fan 300 facing the indoor air inlet.

In some embodiments, the second fan is located below the air inlet duct 401, and the third air inlet 304 of the second fan faces the third heat exchange section 103 of the indoor heat exchanger 100. Therefore, when the first fan, that is, the duplex centrifugal fan 200 and the second fan, are both turned on, the wind pressures of the first air inlet 201, the second air inlet 202 and the third air inlet 304 are the same, so that the wind speeds of all positions passing through the indoor heat exchanger 100 are the same, it is ensured that the air can pass through the indoor heat exchanger 100 at a constant speed, and the heat exchange efficiency is improved.

In some embodiments, the unidirectional centrifugal fan 300 includes: a connecting piece 301, a driving piece 302 and a centrifugal fan blade 303, wherein the connecting piece 301 is detachably connected with the shell; the driving piece 302 is arranged on the connecting piece 301; the centrifugal fan 303 is disposed between the connecting member 301 and the indoor heat exchanger 100, and the driving member 302 drives the centrifugal fan 303 to rotate.

Referring to fig. 9 and 10, in some embodiments, the lower surface of the air inlet pipe 401 is provided with a mounting seat, and the mounting seat is provided with a mounting hole, the mounting hole is a circular hole, and the axis of the mounting hole is parallel to the duplex centrifugal fan 200. The connecting piece 301 is disc-shaped, the connecting piece 301 is attached to the side of the mounting seat, which is away from the indoor heat exchanger 100, and the connecting piece 301 and the mounting hole are coaxially arranged. The connection means between the connection member 301 and the mounting seat includes, but is not limited to, bolts, screws, bolts, snaps, and buckles. The driving member 302 is a motor, a body of the motor is disposed on the connecting member 301, and an output shaft of the motor is coaxial with the mounting hole. The centrifugal fan 303 is coaxially fixed to the output shaft of the motor. When the motor in the unidirectional centrifugal fan 300 is started, the motor drives the centrifugal fan blades 303 to rotate in the mounting holes. The air is output by the unidirectional centrifugal fan 300 through the installation holes after passing through the third heat exchange section 103 of the indoor heat exchanger 100.

Referring to fig. 1 to 7, in some embodiments, the casing is provided with second air outlets, and the second air outlets are disposed at two sides of the unidirectional centrifugal fan 300. The one-way centrifugal fan 300 discharges the air through the second discharge port.

In some embodiments, the sidewall of the unidirectional centrifugal fan 300 is a second air outlet, and the second air outlet is two and is respectively disposed on the left and right sides of the two mounting seats. The second air outlet penetrates into the mounting hole. The air is discharged through the second air outlet and the second air outlet of the mounting hole. The connector 301 blocks air from leaking out from an end of the mounting hole away from the indoor heat exchanger 100, thereby improving efficiency.

In some embodiments, an air deflector 500 is disposed at each second air outlet. The angle of the air output from the second air outlet can be adjusted by the air guide plate 500, so that the comfort of the user is improved.

In some embodiments, the second air outlet is a rectangular hole, and the length direction of the second air outlet is horizontally arranged. The air guide plates 500 are provided in plurality, and the air guide plates 500 are arranged at intervals along the length direction of the second air outlet, and the distance between any two adjacent second air guide plates 500 is the same. The air deflector 500 is a rectangular plate and is vertically arranged, the top of the air deflector 500 is rotatably connected with the inner top wall of the second air outlet, and the bottom of the air deflector 500 is rotatably connected with the inner bottom wall of the second air outlet.

In some embodiments, a connecting rod is arranged in each second air outlet and arranged along the length direction of the corresponding second air outlet. The connecting rods are hinged with the corresponding air deflectors 500, and when the connecting rods are pushed, the connecting rods drive all the air deflectors 500 to turn over so as to adjust the angle corresponding to the second air outlet.

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 manually pressed, and the control panel controls the pushing piece to push the connecting rod so as to control the angle of the air deflector 500. The pushing piece can be controlled to push the connecting rod through a remote controller.

In some embodiments, the second fan is an axial fan, and a side of the axial fan facing away from the indoor heat exchanger 100 is the second air outlet. The axial fan rotates to be connected in the casing, and the preceding bottom of casing is seted up in the second air exit, and the axial fan blows off the air through the second air exit.

In some embodiments, the rotation speed of the duplex centrifugal fan 200 and the rotation speed of the unidirectional centrifugal fan 300 are adjusted to make the wind pressure at the first air inlet 201, the second air inlet 202 and the third air inlet 304 the same, so as to ensure that the wind speed of the air passing through the first heat exchange section 101, the second heat exchange section 102 and the third heat exchange section 103 of the indoor heat exchanger 100 is the same.

In some embodiments, the indoor heat exchanger 100 is detachably connected to the housing.

In some embodiments, the top of the casing is communicated with the outside, the top of the casing is provided with an air exhaust member, and the first air outlet 600 is opened on the air exhaust member. The casing still includes the base, and the slot has all been seted up to the upper surface of base and the lower surface of the piece of airing exhaust, pegs graft respectively in two slots with the setting of accomplishing indoor heat exchanger 100 with the top and the bottom of indoor heat exchanger 100.

In some embodiments, 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 first exhaust opening 600 opens directly into the upper surface of the housing.

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:

a housing having an indoor air inlet at a side thereof;

the indoor heat exchanger is arranged in the shell and positioned on the inner side of the indoor air inlet, and comprises a first heat exchange section, a second heat exchange section and a third heat exchange section which are sequentially arranged along the longitudinal direction;

the first fan is arranged in the shell and is provided with a first air inlet and a second air inlet; the first air inlet corresponds to a first heat exchange section of the indoor heat exchanger;

the air inlet channel is formed in the shell, one end of the air inlet channel corresponds to the second heat exchange section of the indoor heat exchanger, the other end of the air inlet channel is communicated with the second air inlet, and one end of the air inlet channel corresponding to the indoor heat exchanger is positioned below the first fan;

the second fan is arranged in the shell and is provided with a third air inlet, and the third air inlet corresponds to the third heat exchange section of the indoor heat exchanger.

2. An indoor unit of an air conditioner according to claim 1, wherein the first fan is a duplex centrifugal fan, and the first air inlet and the second air inlet are both ends of the duplex centrifugal fan, respectively; the casing is provided with a first exhaust port, the duplex centrifugal fan is provided with a first air outlet, and the first air outlet is communicated with the first exhaust port.

3. The indoor unit of claim 2, wherein a rotation axis of the duplex centrifugal fan is disposed along a front-rear direction of the casing, the first air inlet is directed toward the indoor air inlet, and the second air inlet is directed away from the indoor air inlet.

4. An indoor unit of an air conditioner according to claim 3, wherein the air intake passage includes:

the air inlet pipe is arranged in the shell; the air inlet pipe is arranged between the first fan and the second fan, and one end of the air inlet pipe corresponds to the second heat exchange section of the indoor heat exchanger;

and the connecting box is arranged on one side of the duplex centrifugal fan, which deviates from the indoor air inlet, and the end, which is far away from the indoor air inlet, of the air inlet pipe is communicated with the second air inlet of the duplex centrifugal fan.

5. An indoor unit of an air conditioner according to claim 4, wherein the duplex centrifugal fan is installed on an outer wall of the air inlet duct facing away from the second fan.

6. An indoor unit of an air conditioner according to any one of claims 1 to 5, wherein the second fan is a unidirectional centrifugal fan, and the third air inlet is provided at an end of the unidirectional centrifugal fan facing the indoor air inlet.

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

the connecting piece is detachably connected to the shell;

the driving piece is arranged on the connecting piece;

8. An indoor unit of an air conditioner as claimed in claim 6, wherein the casing is provided with second air outlets disposed at both sides of the unidirectional centrifugal fan.

9. An indoor unit of an air conditioner according to claim 8, wherein air deflectors are provided at each of the second air outlets.

10. An indoor unit of an air conditioner according to any one of claims 1 to 5, wherein the first discharge port is provided at a top end of the casing.