CN215723640U

CN215723640U - Indoor machine of air conditioner

Info

Publication number: CN215723640U
Application number: CN202121466264.8U
Authority: CN
Inventors: 张家栋; 谢宝臣
Original assignee: Hisense Shandong Air Conditioning Co Ltd
Current assignee: Hisense Shandong Air Conditioning Co Ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-02-01
Anticipated expiration: 2031-06-28

Abstract

The utility model discloses an air conditioner indoor unit, comprising: the air conditioner comprises a machine shell, a front air inlet and a rear air inlet, wherein the machine shell is provided with an upper front air outlet and a lower front air outlet, and the upper front air outlet is arranged above the lower front air outlet and has the same direction as the lower front air outlet; the indoor heat exchanger is arranged in the shell; the air channel piece is arranged in the shell and positioned in front of the indoor heat exchanger, and is communicated with the upper positive air outlet and the lower positive air outlet; the axial flow fan is arranged in the air duct piece, and the axial position of the axial flow fan corresponds to the position of the upper positive air outlet; the double-suction centrifugal fan assembly is arranged in the air channel piece and located below the axial flow fan, and one radial side of the double-suction centrifugal fan assembly corresponds to the position of the lower positive air outlet. The air conditioner indoor unit provided by the embodiment of the utility model has the advantages of large air outlet area, long air supply distance, soft wind feeling, good hot wind experience and the like.

Description

Indoor machine of air conditioner

Technical Field

The utility model relates to the technical field of air conditioning equipment, in particular to an air conditioner indoor unit.

Background

Air conditioner indoor units in the prior art have small air supply difference, can supply air to a single position and angle in the air supply process, can adjust the wind direction through the swinging of the baffle, but the adjusting range of the mode is limited, the air supply requirement on a large scale is difficult to realize, the air outlet experience of the air conditioner is influenced, even if the air flow direction is adjusted, the loss of the wind speed and the wind pressure is large, and especially when hot air is generated, the heating effect of indoor lower space and far end is poor. Therefore, the indoor unit of the air conditioner cannot give consideration to long-distance air supply, the wind feeling is soft, the heating comfort is realized, and the user experience needs to be improved.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, one objective of the present invention is to provide an air conditioner indoor unit, which has a large air outlet area and has the advantages of long air supply distance, soft wind feeling, good hot wind experience, and the like.

In order to achieve the above object, an air conditioner indoor unit according to an embodiment of the present invention includes: the air conditioner comprises a machine shell, a fan and a control device, wherein the machine shell is provided with an upper positive air outlet and a lower positive air outlet, and the upper positive air outlet is arranged above the lower positive air outlet and has the same direction as the lower positive air outlet; the indoor heat exchanger is arranged in the shell; the air duct piece is arranged in the shell and positioned in front of the indoor heat exchanger, and is communicated with the upper positive air outlet and the lower positive air outlet; the axial flow fan is arranged in the air duct piece, and the axial position of the axial flow fan corresponds to the position of the upper positive air outlet; the double-suction centrifugal fan assembly is arranged in the air channel piece and located below the axial flow fan, and one radial side of the double-suction centrifugal fan assembly corresponds to the position of the lower positive air outlet.

The air conditioner indoor unit provided by the embodiment of the utility model has the advantages of large air outlet area, long air supply distance, soft wind feeling, good hot wind experience and the like.

According to some embodiments of the utility model, the air duct member comprises: the upper air duct piece is provided with an opening, the opening corresponds to the position of the upper positive air outlet, and the axial flow fan is installed on the upper air duct piece; the lower air duct piece is connected below the upper air duct piece, the double-suction centrifugal fan assembly is installed on the lower air duct piece, a lower air duct air outlet is formed in the lower air duct piece, and the lower air duct air outlet is located on one radial side of the double-suction centrifugal fan assembly and communicated with the lower positive air outlet.

Furthermore, the lower air duct piece is provided with a rotatable air deflector at the lower air duct air outlet, the air deflector opens and closes the lower air duct air outlet through rotation of the air deflector, and a rotation axis of the air deflector extends along the width direction of the lower air duct piece.

Furthermore, the air deflector comprises a plurality of parallel blades, and the included angle between each blade and the horizontal direction is rotatably adjusted between 90 degrees and 10 degrees.

According to some embodiments of the utility model, the double suction centrifugal fan assembly comprises: the volute is arranged in the lower air duct piece, inlets are formed in the two axial ends of the volute, an outlet is formed in one radial side of the volute, and the outlet is adjacent to and corresponds to the air outlet of the lower air duct; and the double-suction centrifugal fan is arranged in the volute.

Further, the volute comprises: the surrounding air guide part surrounds the outer side of the double-suction centrifugal fan along the circumferential direction of the double-suction centrifugal fan; the air outlet part is connected to one side in the radial direction of the surrounding air guide part and communicated with the surrounding air guide part, the outlet is arranged in the air outlet part, and the air outlet part gradually inclines downwards along the direction of the outlet. The surrounding air guide part guides the airflow of the double-suction centrifugal fan to the air outlet part along the circumferential direction of the double-suction centrifugal fan, and the airflow is guided to the lower air outlet of the lower air duct by the air outlet part.

According to some embodiments of the utility model, the double suction centrifugal fan is a forward centrifugal fan.

According to some embodiments of the utility model, the rotation axis of the axial fan and the rotation axis of the double suction centrifugal fan both extend in a horizontal direction and are perpendicular to each other; or the rotation axis of the axial flow fan extends along the horizontal direction and the rotation axis of the double-suction centrifugal fan extends along the vertical direction.

According to some embodiments of the present invention, the axial flow fan includes a motor and a fan, the upper duct member is provided with an air guide grid at the opening, an axial flow motor mounting groove is provided at a central position of the air guide grid, and the motor of the axial flow fan is mounted in the axial flow motor mounting groove.

Furthermore, the air guide grid comprises a plurality of grid pieces, the grid pieces radially and spirally extend from the center of the air guide grid to the edge of the air guide grid, the fan of the axial flow fan radially and spirally extends from the center of the air guide grid to the edge of the air guide grid, and the air guide grid and the fan of the axial flow fan are opposite in spiral direction.

According to some embodiments of the present invention, a surface of the indoor heat exchanger facing the axial flow fan and the double suction centrifugal fan assembly is configured with a recess at a center in a width direction of the indoor heat exchanger, and the double suction centrifugal fan assembly is provided at the recess.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of an indoor unit of an air conditioner according to an embodiment of the present invention;

fig. 2 is an exploded view of an indoor unit of an air conditioner according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a double suction centrifugal fan assembly of an air conditioner indoor unit according to an embodiment of the present invention;

fig. 4 is a sectional view of an indoor unit of an air conditioner according to an embodiment of the present invention.

Reference numerals:

an indoor unit 1 of an air conditioner, an indoor heat exchanger 100,

An air duct member 200, an upper air duct member 210, an air guide grill 212, an axial-flow motor mounting groove 213, a grill 214, a fan motor, a motor control device, a fan motor control device, and a motor control method,

A lower air duct piece 220, an opening 211, a lower air duct air outlet 221, an air deflector 222, a blade 223,

An axial flow fan 300,

Double suction centrifugal fan assembly 400, volute 410, inlet 411, outlet 412, double suction centrifugal fan 420,

Surrounding the air guiding part 413 and the air outlet part 414.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more, and "several" means one or more.

In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

In the description of the utility model, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

An air conditioner indoor unit 1 according to an embodiment of the present invention, which air conditioner indoor unit 1 may be a floor type air conditioner indoor unit, is described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, an air conditioner indoor unit 1 according to an embodiment of the present invention includes a cabinet (not shown), an indoor heat exchanger 100, an air duct member 200, an axial flow fan 300, and a double suction centrifugal fan assembly 400.

The casing is provided with an upper positive air outlet and a lower positive air outlet, the upper positive air outlet is arranged above the lower positive air outlet and has the same orientation with the lower positive air outlet, for example, the upper positive air outlet and the lower positive air outlet are arranged on the front surface of the casing.

The indoor heat exchanger 100 is provided in the cabinet. The air duct member 200 is disposed in the casing and located in front of the indoor heat exchanger 100, and the air duct member 200 is communicated with both the upper and lower front air outlets. The axial flow fan 300 is arranged in the air duct member 200, and the axial position of the axial flow fan 300 corresponds to the position of the upper positive air outlet. Double suction centrifugal fan subassembly 400 is located in wind channel spare 200 and is located axial fan 300's below, and the radial one side of double suction centrifugal fan subassembly 400 corresponds with the position of lower positive air outlet.

According to the air conditioner indoor unit 1 provided by the embodiment of the utility model, the axial flow fan 300 and the double-suction centrifugal fan assembly 400 are arranged, so that the upper part and the lower part of the air conditioner have larger air outlet volume and air outlet area, the axial flow fan 300 is adopted at the upper positive air outlet for air outlet at the upper part of the air conditioner indoor unit 1, and the airflow generated by the axial flow fan 300 enables a user to feel soft wind. The lower part of the indoor unit 1 of the air conditioner adopts the double-suction centrifugal fan assembly 400 to supply air, and the double-suction centrifugal fan assembly 400 has higher static pressure and long air supply distance.

And, double suction centrifugal fan subassembly 400 is located axial fan 300's below and through the lower positive air outlet air-out of lower part, and when air conditioner 1 produced hot-blastly, the air current that double suction centrifugal fan subassembly 400 produced can be guided to the low place, improves the poor problem of room lower part space and distal end heating effect to obtain good hot-blast experience.

Therefore, the air conditioner indoor unit 1 according to the embodiment of the present invention has a large air outlet area, and has the advantages of a long air supply distance, a soft wind feeling, a good hot wind experience, and the like.

In some embodiments of the present invention, as shown in fig. 1 and 2, the air duct member 200 includes an upper air duct member 210 and a lower air duct member 220.

Go up wind channel piece 210 and be equipped with uncovered 211, uncovered 211 corresponds with the position of last positive air outlet, and axial fan 300 installs in last wind channel piece 210.

The lower air duct piece 220 is connected below the upper air duct piece 210, the double-suction centrifugal fan assembly 400 is installed on the lower air duct piece 220, the lower air duct piece 220 is provided with a lower air duct air outlet 221, and the lower air duct air outlet 221 is located on one radial side of the double-suction centrifugal fan assembly 400 and is communicated with the lower positive air outlet.

For example, the upper duct member 210 and the lower duct member 220 are stacked up and down, the upper duct member 210 and the lower duct member 220 may be integrally formed, and both the upper duct member 210 and the lower duct member 220 are adapted to the inner contour of the cabinet. Because the position of uncovered 211 and last positive air outlet corresponds, make axial fan 300 produce wind can directly carry to indoor through uncovered 211 and last positive air outlet.

The lower air duct piece 220 is provided with a lower air duct outlet 221, and the lower air duct outlet 221 is communicated with the lower front air outlet at one side in the radial direction of the double-suction centrifugal fan assembly 400, so that the air flow generated by the double-suction centrifugal fan assembly 400 can be transmitted to the lower air duct outlet 221 and the lower front air outlet. And because uncovered 211 and last positive air outlet intercommunication, lower wind channel air outlet 221 is in the place ahead of double suction centrifugal fan subassembly 400 and is communicate with positive air outlet down, and then upper wind channel piece 210 and lower wind channel piece 220 can wind-guiding alone, guarantee axial fan 300 and double suction centrifugal fan subassembly 400's wind-guiding efficiency.

Further, as shown in fig. 1, the lower duct member 220 is provided with a rotatable air deflector 222 at the lower duct outlet 221, the air deflector 222 opens and closes the lower duct outlet 221 by its rotation, and a rotation axis of the air deflector 222 extends along a width direction (i.e., a left-right direction) of the lower duct member 220.

The rotation of the air deflector 222 can change the airflow direction conveyed to the lower positive air outlet by the double-suction centrifugal fan assembly 400, so that the air conditioner indoor unit 1 can more effectively adjust the room temperature in different temperature adjusting states, and can also close the lower air duct air outlet 221, and the lower air duct air outlet 221 is closed in a shutdown state to play a dustproof role.

Further, as shown in fig. 2, the air deflector 222 includes a plurality of parallel blades 223, and an included angle between the blades 223 and the horizontal direction is rotatably adjusted between 90 ° and 10 °.

When the included angle between the blade 223 and the horizontal direction is 90 °, the blade 223 closes the lower air duct outlet 221, and when the included angle between the blade 223 and the horizontal direction is 10 °, the air deflector 222 opens at the maximum angle, and at this time, the air guiding efficiency of the double suction centrifugal fan assembly 400 to the indoor direction is the highest. The opening and closing size of the lower air duct air outlet 221 is controlled by adjusting the angle of the blade 223, and the air quantity and the air direction of the lower air duct air outlet 221 are adjusted, for example, when the air conditioner indoor unit 1 releases cold air, the angle of the blade 223 is adjusted to be 80-60 degrees with the horizontal direction, so that the lower part of the air conditioner indoor unit 1 reaches a proper air outlet angle, and cold air is prevented from being blown directly. When air conditioner 1 releases the hot-blast, can adjust the angle of blade 223 wantonly, for example blade 223 is 70 with the contained angle of horizontal direction to with hot-blast direction ground, avoid the dissipation of air current, promote the homogeneity of indoor air supply.

In some embodiments of the present invention, as shown in FIG. 3, a double suction centrifugal fan assembly 400 includes a volute 410 and a double suction centrifugal fan 420.

The volute 410 is arranged in the lower air duct 220, the axial two ends of the volute 410 are provided with inlets 411, one radial side of the volute 410 is provided with an outlet 412, and the outlet 412 is adjacent to and corresponds to the lower air duct air outlet 221. A double suction centrifugal fan 420 is provided within the volute 410.

The volute 410 is arranged in the lower air duct 220, air can be fed into both axial ends of the volute 410, the double-suction centrifugal fan assembly 400 has a large air inlet area, and a large air flow is generated at the outlet 412. The shape of the double-suction centrifugal fan 420 is adapted to the shape of the inner contour of the scroll 410, the airflow generated by the double-suction centrifugal fan 420 can be smoothly transmitted to the outlet 412 along the scroll 410 and conveyed to the indoor through the lower duct air outlet 221, and a larger air pressure can be formed at the lower duct air outlet 221, so as to be transmitted to the indoor to a longer distance.

Further, as shown in fig. 3, the volute 410 includes a surrounding air guiding portion 413 and an air outlet portion 414,

the surrounding air guide part 413 surrounds the outside of the double suction centrifugal fan 420 in the circumferential direction thereof. The air outlet portion 414 is connected to one side of the surrounding air guiding portion 413 in the radial direction and is communicated with the surrounding air guiding portion 413, the air outlet portion 414 can be arranged along the tangential direction of the surrounding air guiding portion 413, the outlet 412 is arranged on the air outlet portion 414, and the air outlet portion 414 is gradually inclined downwards along the direction towards the outlet 412.

The surrounding air guiding portion 413 guides the airflow of the double-suction centrifugal fan 420 to the air outlet portion 414 along the circumferential direction of the double-suction centrifugal fan 420, and guides the airflow to the lower air duct air outlet 221 through the air outlet portion 414.

The volute 410 is configured into an arc shape by configuring the surrounding air guiding portion 413 and the air outlet portion 414 to surround one side of the air guiding portion 413 facing the centrifugal fan 420, so that the airflow generated by the double suction centrifugal fan 420 flows smoothly in the surrounding air guiding portion 413. And the air outlet part 414 is communicated with the surrounding air guide part 413 and the lower air duct air outlet 221, so that the air flow surrounding the air guide part 413 can be directly guided to the air outlet part 414, and the air can be more smoothly discharged to the outlet 412 and the lower air duct air outlet 221, thereby ensuring the remote air supply experience of the lower part of the indoor unit 1 of the air conditioner.

Moreover, because the air outlet portion 414 is gradually inclined downwards along the direction toward the outlet 412, when the air flow of the air outlet portion 414 is guided out from the outlet 412, the angle of the air outlet blade 223 is close to that of the air outlet portion 414, for example, the air outlet portion 414 is inclined downwards along the horizontal direction by 15 degrees to 30 degrees, the air flow of the air outlet portion 414 is guided out smoothly to the air outlet 211 of the lower air duct through the outlet 412, the air flow guided out by the air outlet portion 414 is prevented from being blocked by the air deflector 222 to reduce the air volume, and meanwhile, the double suction centrifugal fan assembly 400 is prevented from blowing directly into the room to affect the comfort, thereby ensuring the good air supply effect of the lower portion of the indoor unit 1 of the air conditioner.

In some embodiments of the utility model, the double suction centrifugal fan 420 is a forward centrifugal fan.

The surface of the fan blade of the forward centrifugal fan is smaller, and the air inlet mode at the two ends of the double-suction centrifugal fan 420 is matched, so that larger air pressure can be generated at the outlet 412, the air supply device is suitable for supplying air in a more concentrated area, and the air supply distance is long.

In some embodiments of the present invention, the rotation axis of the axial flow fan 300 and the rotation axis of the double suction centrifugal fan 420 both extend in a horizontal direction and are perpendicular to each other, or the rotation axis of the axial flow fan 300 extends in a horizontal direction and the rotation axis of the double suction centrifugal fan 420 extends in a vertical direction.

For example, the rotation axis of the axial flow fan 300 extends in the front-rear direction, the air outlet direction of the axial flow fan 300 faces the front side of the air conditioner indoor unit 1, the air guiding direction of the axial flow fan 300 does not need to be changed, and air guiding is more direct and smooth. The rotation axis of the double-suction centrifugal fan 420 extends in the left-right direction, and is the same as the extending direction of the air deflector 222, and the double-suction centrifugal fan 420 is adapted to the shape of the lower air duct air outlet 211, so that the lower air duct piece 220 has a larger air guiding range in the left-right direction, and a larger air guiding area.

For another example, the rotation axis of the axial flow fan 300 extends in the front-rear direction, and the rotation axis of the double suction centrifugal fan 420 extends in the up-down direction, so that the shape of the double suction centrifugal fan assembly 400 is more adapted to the contour of the inside of the casing, thereby improving the space utilization rate inside the casing.

In some embodiments of the present invention, as shown in fig. 2, the axial flow fan 300 includes a motor and a fan, the upper duct member 210 is provided with an air guide grill 212 at the opening 211, an axial flow motor mounting groove 213 is provided at a central position of the air guide grill 212, and the motor of the axial flow fan 300 is mounted to the axial flow motor mounting groove 213.

The air guide grille 212 breaks up the airflow generated by the axial flow fan 300 and conveys the airflow to the indoor from the upper front air outlet, so that the air supply above the indoor unit 1 of the air conditioner is soft, and the discomfort caused by direct blowing is reduced. And the center position of the air guide grill 212 can enable the axial flow fan 300 and the air guide grill 212 to be stably assembled through the axial flow motor mounting groove 213.

Further, as shown in fig. 2, the air guiding grille 212 includes a plurality of grids 214, the plurality of grids 214 radially and spirally extend from the center of the air guiding grille 212 to the edge of the air guiding grille 212, the fan of the axial flow fan 300 radially and spirally extends from the center to the edge, and the spiral directions of the air guiding grille 212 and the fan of the axial flow fan 300 are opposite.

For example, when viewed from the front of the air conditioner indoor unit 1, the spiral direction of the fan of the axial flow fan 300 extends in a clockwise spiral manner, and the air guide grille 212 extends in a counterclockwise spiral manner. So, axial fan 300's fan can be disturbed the flow by bars piece 214 to uncovered 211 wind-guiding, and bars piece 214 can further promote uncovered 211 and the air-out effect of last positive air outlet, and then forms soft air-out on air conditioner 1 upper portion and experiences.

In some embodiments of the present invention, a surface of the indoor heat exchanger 100 facing the axial flow fan 300, the double suction centrifugal fan assembly 400 is configured with a recess at a center in a width direction of the indoor heat exchanger 100, and the double suction centrifugal fan assembly 400 is provided at the recess.

From this, indoor heat exchanger 100 surrounds in the rear side and the left and right sides of double suction centrifugal fan subassembly 400, and the rear side and the left and right sides homoenergetic of double suction centrifugal fan subassembly 400 can obtain abundant heat transfer, guarantee air conditioner 1's heat transfer effect.

Other constructions and operations of the indoor unit 1 of the air conditioner according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

The air conditioner indoor unit performs a refrigeration cycle by using a compressor, a condenser, an expansion valve, and an evaporator. 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 high-temperature and high-pressure state and discharges the compressed refrigerant gas. 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 evaporator 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 evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an 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 evaporator. The air conditioner is used as a heater in a heating mode when the indoor heat exchanger is used as a condenser, and as a cooler in a cooling mode when the indoor heat exchanger is used as an evaporator.

In the description herein, references to the description of "a particular embodiment," "a particular example," etc., 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 utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. An indoor unit for an air conditioner, comprising:

the air conditioner comprises a machine shell, a fan and a control device, wherein the machine shell is provided with an upper positive air outlet and a lower positive air outlet, and the upper positive air outlet is arranged above the lower positive air outlet and has the same direction as the lower positive air outlet;

the indoor heat exchanger is arranged in the shell;

the air duct piece is arranged in the shell and positioned in front of the indoor heat exchanger, and is communicated with the upper positive air outlet and the lower positive air outlet;

the axial flow fan is arranged in the air duct piece, and the axial position of the axial flow fan corresponds to the position of the upper positive air outlet;

the double-suction centrifugal fan assembly is arranged in the air channel piece and located below the axial flow fan, and one radial side of the double-suction centrifugal fan assembly corresponds to the position of the lower positive air outlet.

2. An indoor unit for an air conditioner according to claim 1, wherein the air duct member comprises:

the upper air duct piece is provided with an opening, the opening corresponds to the position of the upper positive air outlet, and the axial flow fan is installed on the upper air duct piece;

the lower air duct piece is connected below the upper air duct piece, the double-suction centrifugal fan assembly is installed on the lower air duct piece, a lower air duct air outlet is formed in the lower air duct piece, and the lower air duct air outlet is located on one radial side of the double-suction centrifugal fan assembly and communicated with the lower positive air outlet.

3. The indoor unit of claim 2, wherein the lower duct member has a rotatable air deflector mounted at the lower duct outlet, the air deflector opening and closing the lower duct outlet by rotating itself, and a rotation axis of the air deflector extends in a width direction of the lower duct member.

4. An indoor unit of an air conditioner according to claim 3, wherein the air deflector comprises a plurality of parallel blades, and the included angle between the blades and the horizontal direction is rotatably adjusted between 90 degrees and 10 degrees.

5. An indoor unit for an air conditioner according to claim 2, wherein the double suction centrifugal fan assembly comprises:

the volute is arranged in the lower air duct piece, inlets are formed in the two axial ends of the volute, an outlet is formed in one radial side of the volute, and the outlet is adjacent to and corresponds to the air outlet of the lower air duct;

and the double-suction centrifugal fan is arranged in the volute.

6. An indoor unit for an air conditioner according to claim 5, wherein the scroll casing includes:

the surrounding air guide part surrounds the outer side of the double-suction centrifugal fan along the circumferential direction of the double-suction centrifugal fan;

the air outlet part is connected to one side in the radial direction of the surrounding air guide part and communicated with the surrounding air guide part, the outlet is arranged in the air outlet part, and the air outlet part gradually inclines downwards along the direction of the outlet.

The surrounding air guide part guides the airflow of the double-suction centrifugal fan to the air outlet part along the circumferential direction of the double-suction centrifugal fan, and the airflow is guided to the lower air outlet of the lower air duct by the air outlet part.

7. An indoor unit for an air conditioner according to claim 5, wherein the double suction centrifugal fan is a forward centrifugal fan.

8. An indoor unit of an air conditioner according to claim 5, wherein the rotation axis of the axial flow fan and the rotation axis of the double suction centrifugal fan extend in the horizontal direction and are perpendicular to each other; or

The rotation axis of the axial flow fan extends along the horizontal direction and the rotation axis of the double-suction centrifugal fan extends along the vertical direction.

9. An indoor unit of an air conditioner as claimed in claim 2, wherein the axial flow fan comprises a motor and a fan, the upper duct member is provided with an air guide grid at the opening, an axial flow motor mounting groove is formed in the center of the air guide grid, and the motor of the axial flow fan is mounted in the axial flow motor mounting groove.

10. An indoor unit of an air conditioner according to claim 9, wherein the air guiding grille includes a plurality of blades extending in a radial spiral manner from a center of the air guiding grille to an edge of the air guiding grille, the fan of the axial flow fan extends in a radial spiral manner from the center to the edge of the air guiding grille, and the spiral directions of the air guiding grille and the fan of the axial flow fan are opposite.

11. An indoor unit for an air conditioner according to claim 1, wherein a surface of the indoor heat exchanger facing the axial flow fan and the double suction centrifugal fan assembly is configured with a recess at a center in a width direction of the indoor heat exchanger, and the double suction centrifugal fan assembly is provided at the recess.