CN217357120U - Indoor unit of air conditioner - Google Patents

Abstract

The present application relates to the technical field of air conditioners, and discloses an indoor unit of an air conditioner, comprising: a heat exchange casing, a fresh air volute and a dual-shaft motor. A cross-flow fan is arranged inside the heat exchange casing; the fresh air volute is arranged at one end of the heat exchange casing, and a centrifugal impeller is arranged inside the fresh air volute, and the centrifugal impeller and the cross-flow fan are arranged coaxially; the double-shaft motor is arranged in the fresh air volute inside, and the first output shaft of the double shaft motor is connected with the centrifugal impeller, and the second output shaft of the double shaft motor is connected with the cross-flow fan through the side wall of the fresh air volute. In the present application, by arranging the dual-shaft motor between the centrifugal impeller and the cross-flow fan, and simultaneously driving the centrifugal impeller and the cross-flow fan, the driving stability of the centrifugal impeller and the cross-flow fan is improved, and the dual-shaft motor is By being arranged in the fresh air volute, the axial length of the indoor unit of the air conditioner can be reduced, the structure is more compact, and the installation difficulty and production cost are reduced.

Description

Air conditioner indoor unit

technical field

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

Background technique

At present, air conditioners are used by more and more users as common household appliances. Most of the existing air conditioners use a single flow fan to drive the gas circulation, and exchange heat with the heat exchanger through the circulating gas, so as to achieve the cooling system of the indoor environment. However, in order to ensure the temperature regulation efficiency of the indoor environment, the indoor environment is mostly in a closed state. After the air conditioner works for a long time, the air quality of the indoor environment will decrease. Therefore, it is necessary to introduce outdoor fresh air to improve the air quality of the indoor environment.

There is a fresh air system in the related art, which includes a cross-flow fan and a fresh air fan coaxially connected with it. The air inlet of the fresh air fan is connected to the outdoor environment. The fan rotates at the same time, and the outdoor fresh air is introduced to improve the air quality of the indoor environment while cooling and heating the indoor environment.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

By arranging a drive motor at one end of the cross-flow fan, the length of the cross-flow fan in the axial direction will be increased, thereby increasing the overall volume of the air conditioner indoor unit, and increasing the installation difficulty and production cost.

Utility model content

In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended to be an extensive review, nor to identify key/critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

The embodiments of the present disclosure provide an air conditioner indoor unit, so as to reduce the axial length of the air conditioner indoor unit, make the structure more compact, and reduce installation difficulty and production cost.

In some embodiments, an air conditioner indoor unit includes: a heat exchange housing, a fresh air volute, and a dual-shaft motor. A cross-flow fan is arranged inside the heat exchange casing; the fresh air volute is arranged at one end of the heat exchange casing, and a centrifugal impeller is arranged inside the fresh air volute, and the centrifugal impeller and the cross-flow fan are arranged coaxially; the double-shaft motor is arranged in the fresh air volute Inside, the first output shaft of the double-shaft motor is connected with the centrifugal impeller, and the second output shaft of the double-shaft motor is connected with the cross-flow fan through the side wall of the fresh air volute.

Optionally, the fresh air volute includes: a volute case and a volute cover. The volute casing is arranged at one end of the heat exchange casing; the volute cover and the volute casing are detachably connected, the volute casing and the volute casing jointly define a cavity, and the centrifugal impeller and the double-shaft motor are both arranged in the cavity.

Optionally, the volute casing and the heat exchange casing are integrally formed.

Optionally, the inner wall of the fresh air volute is provided with an installation sleeve, and the biaxial motor is installed in the installation sleeve.

Optionally, the axial center part of the centrifugal impeller is provided with an annular connecting seat adapted to the installation sleeve, the annular connecting seat is sleeved outside the installation sleeve, and the end of the first output shaft is fixedly connected with the annular connecting seat.

Optionally, a bearing seat is provided on the side wall of the heat exchange housing adjacent to the fresh air volute, and the second output shaft is connected to the cross-flow fan through the bearing seat.

Optionally, a side wall of the fresh air volute facing away from the heat exchange casing is provided with a filter box, and the air inlet of the fresh air volute is communicated with the filter box.

Optionally, the filter box has an air introduction port and a maintenance port, the air introduction port communicates with the outdoor environment, and the maintenance port is sealed by a detachable sealing cover.

Optionally, a filter module is provided in the filter box, and the filter module can be replaced through the maintenance port.

Optionally, the air outlet of the fresh air volute is disposed toward the air return port of the heat exchange housing.

The air conditioner indoor unit provided by the embodiments of the present disclosure can achieve the following technical effects:

A fresh air volute is set at one end of the heat exchange shell, and the cooperation between the heat exchange shell and the fresh air volute is used to cool and heat the indoor environment while introducing outdoor fresh air to improve the air quality of the indoor environment. Between the centrifugal impeller and the cross-flow fan, the centrifugal impeller and the cross-flow fan are driven at the same time, which improves the driving stability of the centrifugal impeller and the cross-flow fan, and the double-shaft motor is arranged in the fresh air volute, which can reduce the air conditioning rate. The axial length of the indoor unit makes the structure more compact and reduces installation difficulty and production cost.

The foregoing general description and the following description are exemplary and explanatory only and are not intended to limit the application.

Description of drawings

One or more embodiments are exemplified by the accompanying drawings, which are not intended to limit the embodiments, and elements with the same reference numerals in the drawings are shown as similar elements, The drawings do not constitute a limitation of scale, and in which:

1 is a cross-sectional view of an air conditioner indoor unit provided by an embodiment of the present disclosure;

2 is a schematic structural diagram of an air conditioner indoor unit provided by an embodiment of the present disclosure;

3 is an exploded schematic diagram of a fresh air volute provided by an embodiment of the present disclosure;

4 is a schematic structural diagram of a centrifugal impeller and an installation sleeve provided by an embodiment of the present disclosure;

5 is a schematic structural diagram of a dual-shaft motor provided by an embodiment of the present disclosure;

6 is a schematic structural diagram of another air conditioner indoor unit provided by an embodiment of the present disclosure;

7 is a schematic structural diagram of a filter box provided by an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of another air conditioner indoor unit provided by an embodiment of the present disclosure.

Reference number:

100, heat exchange shell; 110, cross-flow fan; 120, bearing seat; 130, return air outlet;

200, fresh air volute; 210, centrifugal impeller; 211, annular connection seat; 220, volute casing; 221, screw seat; 240, installation sleeve; 250, air inlet; 260, air outlet;

300, double shaft motor; 310, first output shaft; 320, second output shaft;

400, filter box; 410, box cover; 420, box body; 430, air inlet; 440, maintenance port; 441, sealing cover.

Detailed ways

In order to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings, which are for reference only and are not intended to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, numerous details are provided to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawings.

The terms "first", "second" and the like in the description and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances for the purposes of implementing the embodiments of the disclosure described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion.

In the embodiments of the present disclosure, the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. are based on the orientations shown in the drawings or Positional relationship. These terms are primarily used to better describe the embodiments of the present disclosure and embodiments thereof, and are not intended to limit the fact that the indicated device, element, or component must have a particular orientation, or be constructed and operated in a particular orientation. In addition, some of the above-mentioned terms may be used to express other meanings besides orientation or positional relationship. For example, the term "on" may also be used to express a certain attachment or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific situations.

In addition, the terms "arranged", "connected" and "fixed" should be construed broadly. For example, "connection" may be a fixed connection, a detachable connection, or a unitary construction; it may be a mechanical connection, or an electrical connection; it may be a direct connection, or an indirect connection through an intermediary, or two devices, elements or Internal connectivity between components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific situations.

Unless stated otherwise, the term "plurality" means two or more.

It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments may be combined with each other in the case of no conflict.

With reference to FIGS. 1-8 , an embodiment of the present disclosure provides an indoor unit of an air conditioner, including: a heat exchange housing 100 , a fresh air volute 200 , and a dual-shaft motor 300 . A cross-flow fan 110 is arranged inside the heat exchange housing 100; the fresh air volute 200 is arranged at one end of the heat exchange housing 100, and a centrifugal impeller 210 is arranged inside the fresh air volute 200, and the centrifugal impeller 210 is arranged coaxially with the cross-flow fan 110; The biaxial motor 300 is disposed in the fresh air volute 200 , and the first output shaft 310 of the biaxial motor 300 is connected to the centrifugal impeller 210 , and the second output shaft 320 of the biaxial motor 300 passes through the side wall of the fresh air volute 200 and through the shaft. The flow fan 110 is connected.

In the air conditioner indoor unit of the embodiment of the present disclosure, a fresh air volute 200 is arranged at one end of the heat exchange casing 100, and the cooperation between the heat exchange casing 100 and the fresh air volute 200 is used to cool and heat the indoor environment while introducing outdoor fresh air To improve the air quality of the indoor environment, by arranging the dual-shaft motor 300 between the centrifugal impeller 210 and the cross-flow fan 110, and simultaneously driving the centrifugal impeller 210 and the cross-flow fan 110, the distance between the centrifugal impeller 210 and the cross-flow fan 110 is improved. Driving stability, and arranging the dual-shaft motor 300 in the fresh air volute 200 can reduce the axial length of the air conditioner indoor unit, make the structure more compact, and reduce installation difficulty and production cost.

As shown in FIG. 2 and FIG. 3 , in some embodiments, the fresh air volute 200 includes: a volute case 220 and a volute cover 230 . The volute casing 220 is disposed at one end of the heat exchange casing 100 ; the volute casing 230 is detachably connected to the volute casing 220 , the volute casing 230 and the volute casing 220 jointly define a cavity, and the centrifugal impeller 210 and the biaxial motor 300 All are arranged in the cavity. In this way, the fresh air volute 200 is divided into two parts: the volute case 220 and the volute cover 230. The volute cover 230 and the volute case 220 can be detachably installed to facilitate the installation of the centrifugal impeller 210 and the biaxial motor in the cavity. 300. In the case that the centrifugal impeller 210 and the double-shaft motor 300 inside the fresh air volute 200 are damaged, it is convenient to disassemble the fresh air volute 200 for maintenance.

Optionally, the scroll casing 220 and the heat exchange casing 100 are integrally formed. In this way, in order to improve the overall stability of the air conditioner indoor unit, the scroll casing 220 provided at one end of the heat exchange casing 100 is integrally formed with the heat exchange casing 100, so that the scroll casing 220 and the heat exchange casing 100 can be improved. Between the strength, improve the stability, easy to produce.

Optionally, the outer wall of the volute case 220 is provided with a screw seat 221 , the outer wall of the volute case 230 is provided with a through hole seat 231 corresponding to the position of the screw seat 221 , and the volute case 230 and the volute case 220 are assembled by screws. In this way, the volute cover 230 is more firmly fixed on the volute case 220 by the fixing method in which the screw is inserted through the through hole seat 231 into the threaded seat, thereby improving the stability of the fresh air volute 200 .

Specifically, the screw seats 221 are arranged on the radially outer wall of the volute case 220, the through-hole seats 231 are arranged on the radially outer wall of the volute cover 230, and a plurality of screw seats 221 and through-hole seats 231 are respectively arranged along the radial direction. The outer walls of the volute case 220 and the volute cover 230 are evenly distributed. The connection stability between the volute case 220 and the volute cover 230 is further improved.

Optionally, the outer wall of the volute cover 230 is provided with a buckle 232 extending toward the volute casing 220 , and the outer wall of the volute casing 220 is provided with a buckle 222 corresponding to the position of the buckle 232 . In this way, the volute cover 230 is connected to the volute case 220 by using the connection method in which the buckle 232 is clamped on the clamping protrusion 222, so that the volute cover 230 fits better on the volute case 220. The through hole seat 231 on the volute case cover 230 is positioned so that the through hole seat 231 on the volute case cover 230 is more accurately attached to the screw seat 221 on the volute case 220, so that the volute case cover 230 can be fixed on the volute case by screws. 220 on.

With reference to FIGS. 4 and 5 , in some embodiments, the inner wall of the fresh air volute 200 is provided with a mounting sleeve 240 , and the biaxial motor 300 is mounted in the mounting sleeve 240 . In this way, the installation sleeve 240 is arranged in the fresh air volute 200, and the biaxial motor 300 is installed in the installation sleeve 240, which can improve the installation stability of the biaxial motor 300, reduce the vibration generated when the biaxial motor 300 is working, and also The thickness of the fresh air volute 200 in the axial direction can be reduced, thereby reducing the overall length of the air conditioner indoor unit, making the structure more compact, and reducing installation difficulty and production cost.

Optionally, the installation sleeve 240 is fixedly arranged on the side wall of the volute casing 220 , both ends of the installation sleeve 240 in the axial direction have openings, and the first output shaft 310 of the biaxial motor 300 protrudes from the shaft of the installation sleeve 240 . The opening at the upward end is connected to the centrifugal impeller 210 , and the opening at the other end of the second output shaft 320 protrudes from the mounting sleeve 240 in the axial direction and extends into the heat exchange housing 100 to be connected to the cross-flow fan 110 . In this way, the installation sleeve 240 is arranged on the side wall of the volute casing 220, so that the first output shaft 310 and the second output shaft 320 of the biaxial motor 300 arranged in the installation sleeve 240 are connected to the centrifugal impeller 210 and the through-flow, respectively. The fan 110 is connected, and the air inlet end of the connected centrifugal impeller 210 is arranged toward the volute cover 230 to facilitate the communication between the fresh air volute 200 and the outdoor environment.

Optionally, the axial center of the centrifugal impeller 210 is provided with an annular connecting seat 211 adapted to the installation sleeve 240 , the annular connecting seat 211 is sleeved outside the installation sleeve 240 , and the end of the first output shaft 310 is connected to the annular connection. The seat 211 is fixedly connected. In this way, an annular connecting seat 211 is provided on the axial center of the centrifugal impeller 210, so that the centrifugal impeller 210 is connected to the first output shaft 310 of the biaxial motor 300 through the annular connecting seat 211, and the annular connecting seat 211 can be sleeved on the installation sleeve. Outside the 240, the installation sleeve 240 and the biaxial motor 300 arranged in the installation sleeve 240 are surrounded, the installation sleeve 240 is hidden in the axial center of the centrifugal impeller 210, and the installation sleeve 240 and the biaxial motor 300 are lowered. The occupied air conditioner in the fresh air volute 200 reduces the thickness on the axis of the fresh air volute 200, thereby reducing the overall length of the air conditioner indoor unit, making the structure more compact, and reducing installation difficulty and production cost.

Optionally, one end of the annular connecting seat 211 facing the volute casing 220 has a through hole, and the edge of the through hole is connected to one end of the centrifugal impeller 210 facing the side wall of the volute casing 220 through a connecting plate. In this way, the annular connecting seat 211 is sleeved on the outside of the installation sleeve 240 through the through hole, and the edge of the through hole of the annular connecting seat 211 is connected to one end of the centrifugal impeller 210 through the connecting plate, which can improve the stability of the centrifugal impeller 210 . Specifically, an end of the annular connecting seat 211 facing away from the volute housing 220 has a mounting plate, and the first output shaft 310 is connected to the center of the mounting plate.

Optionally, the end face of the annular connecting seat 211 facing the volute casing 220 and the end face of the centrifugal impeller 210 facing the volute casing 220 are in the same plane, and the axial thickness of the annular connecting seat 211 is less than or equal to the axial direction of the centrifugal impeller 210 . and the thickness of the annular connecting seat 211 in the axial direction is greater than or equal to the thickness of the installation sleeve 240 in the axial direction. In this way, the annular connecting seat 211 can be hidden inside the centrifugal impeller 210 , and the thickness of the annular connecting seat 211 is adapted to the thickness of the installation sleeve 240 . The inner biaxial motor 300 is surrounded, and the annular connecting seat 211 , the installation sleeve 240 and the biaxial motor 300 are hidden to reduce the thickness of the fresh air volute 200 in the axial direction.

Specifically, in order to ensure the normal rotation of the centrifugal impeller 210 after installation, there is a gap between the end face of the centrifugal impeller 210 facing the volute casing 220 in the axial direction and the side wall of the volute casing 220, and the inner ring wall of the annular connecting seat 211 There is also a gap with the outer peripheral wall of the mounting sleeve 240 .

Optionally, the inner ring wall of the installation sleeve 240 is provided with a damping washer, and the outer peripheral wall of the biaxial motor 300 is in contact with the damping washer. In this way, the outer peripheral wall of the biaxial motor 300 is brought into contact with the inner ring wall of the installation sleeve 240 through the damping washer, so as to reduce the vibration generated by the biaxial motor 300 during operation.

In some embodiments, the side wall of the heat exchange housing 100 adjacent to the fresh air volute 200 is provided with a bearing seat 120 , and the second output shaft 320 is connected to the cross-flow fan 110 through the bearing seat 120 . The bearing seat 120 is used to support and limit the second output shaft 320, which improves the driving stability of the second output shaft 320. The bearing seat 120 can also support the axial direction of the cross-flow fan 110, so as to avoid the cross-flow fan. 110 Offset up axis.

Optionally, a heat exchanger is further provided in the heat exchange housing 100 , and the heat exchanger is located on the air inlet side of the cross-flow fan 110 . In this way, the rotation of the cross-flow fan 110 can introduce indoor air flow into the heat exchange shell 100, and the air flow into the heat exchange shell 100 can exchange heat with the heat exchanger to form a heat exchange air flow that is blown into the indoor environment, so as to improve the indoor environment. temperature is adjusted.

6 and 7 , in some embodiments, a filter box 400 is provided on a side wall of the fresh air volute 200 facing away from the heat exchange housing 100 , and the air inlet 250 of the fresh air volute 200 communicates with the filter box 400 . In this way, the centrifugal impeller 210 in the fresh air volute 200 rotates to form a negative pressure, so that the outdoor air flow is sucked into the filter box 400 through the air inlet 250, and the inhaled outdoor air flow is filtered by the filter box 400, so as to improve the efficiency of the outdoor air flow introduced into the room. quality, and further improve the air quality of the indoor environment.

Optionally, the filter box 400 includes: a box cover 410 and a box body 420 . The box cover 410 and the box body 420 are detachably connected, and the box cover 410 and the volute cover 230 are integrally formed. In this way, the disassembly and installation of the filter box 400 is facilitated, and the box cover 410 and the volute cover 230 of the integrally formed structure have high strength, which improves the stability between the filter box 400 and the fresh air volute 200 .

Optionally, the air inlet 250 of the fresh air volute 200 is located on the side wall of the volute cover 230 , and the air inlet 250 is a through port structure passing through the volute cover 230 and the box cover 410 . In this way, since the box cover 410 and the volute cover 230 are integrally formed, the air inlet 250 is arranged to pass through the opening structure of the box cover 410 and the volute cover 230, which facilitates the communication between the fresh air volute 200 and the filter box 400 and reduces the wind pressure loss.

Optionally, the air inlet end of the centrifugal impeller 210 is disposed toward the air inlet 250 . In this way, the negative pressure generated by the rotation of the centrifugal impeller 210 can better act on the air inlet 250, thereby reducing the loss of wind pressure and improving the air induction efficiency.

Optionally, the filter box 400 has an air introduction port 430 and a maintenance port 440 , the air introduction port 430 communicates with the outdoor environment, and the maintenance port 440 is sealed by a detachable sealing cover 441 . In this way, when the centrifugal impeller 210 in the fresh air volute 200 rotates, a negative pressure is generated in the filter box 400 through the air inlet 250, and the outdoor airflow is introduced from the air inlet 430 under the action of the negative pressure, and the outdoor airflow flows through the filter box 400. The filter box 400 can be repaired and maintained through the maintenance port 440, and the maintenance port 440 can be sealed by the sealing cover 441 to prevent air leakage at the maintenance port 440 and cause negative pressure in the filter box 400. pressure loss.

Optionally, a filter module is provided in the filter box 400 , and the filter module can be replaced through the maintenance port 440 . In this way, the outdoor airflow flowing through the filter box 400 can be filtered through the filter module to improve the quality of the introduced outdoor airflow, and the filter module can be periodically disassembled through the maintenance port 440 for cleaning and replacement, thereby improving user experience. Specifically, the filter module is an activated carbon adsorption pad.

Optionally, the air inlet 430 is disposed on the side wall of the filter box 400 that is perpendicular to the air inlet 250 . In this way, the air flow introduced through the air inlet 430 can flow into the filter module along the direction perpendicular to the air inlet 250, and then flows into the fresh air volute 200 through the air inlet 250, prolonging the flow time of the outdoor air in the filter module and improving the filtering effect. .

With reference to FIG. 8 , in some embodiments, the air outlet 260 of the fresh air volute 200 is disposed toward the air return port 130 of the heat exchange housing 100 . In this way, since there is a temperature difference between the outdoor environment and the indoor environment, the air outlet 260 of the fresh air volute 200 is arranged towards the air return port 130 of the heat exchange housing 100, so that the outdoor air flow introduced through the fresh air volute 200 can flow to the return air outlet 130 , which flows into the heat exchange shell 100 through the air return port 130 for heat exchange and then blows into the indoor environment, thereby reducing the fluctuation of the outlet air temperature of the air conditioner indoor unit and improving the air outlet comfort.

The foregoing description and drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples represent only possible variations. Unless expressly required, individual components and functions are optional and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. Embodiments of the present disclosure are not limited to the structures that have been described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

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

a heat exchange shell (100) provided with a cross flow fan (110) inside;

the fresh air volute (200) is arranged at one end of the heat exchange shell (100), a centrifugal impeller (210) is arranged in the fresh air volute (200), and the centrifugal impeller (210) and the cross flow fan (110) are coaxially arranged;

the double-shaft motor (300) is arranged in the fresh air volute (200), a first output shaft (310) of the double-shaft motor (300) is connected with the centrifugal impeller (210), and a second output shaft (320) of the double-shaft motor (300) penetrates through the side wall of the fresh air volute (200) to be connected with the cross-flow fan (110).

2. The air-conditioning indoor unit of claim 1, wherein the fresh air scroll (200) comprises:

a volute casing (220) disposed at one end of the heat exchange casing (100);

the worm shell cover (230) is detachably connected with the worm shell (220), the worm shell cover (230) and the worm shell (220) jointly define a cavity, and the centrifugal impeller (210) and the double-shaft motor (300) are arranged in the cavity.

3. The indoor unit of claim 2, wherein the volute casing (220) and the heat exchange casing (100) are of an integral structure.

4. The indoor unit of claim 1, wherein a mounting sleeve (240) is provided on an inner wall of the fresh air scroll (200), and the dual-shaft motor (300) is mounted in the mounting sleeve (240).

5. The indoor unit of claim 4, wherein an annular connecting seat (211) adapted to the mounting sleeve (240) is disposed at an axial center of the centrifugal impeller (210), the annular connecting seat (211) is sleeved outside the mounting sleeve (240), and an end of the first output shaft (310) is fixedly connected to the annular connecting seat (211).

6. The indoor unit of claim 1, wherein a bearing seat (120) is provided on a side wall of the heat exchange casing (100) adjacent to the fresh air volute (200), and the second output shaft (320) passes through the bearing seat (120) and is connected to the cross flow fan (110).

7. The indoor unit of air conditioner as claimed in any one of claims 1 to 6, wherein a filter box (400) is disposed on a side wall of the fresh air volute (200) facing away from the heat exchange housing (100), and an air inlet (250) of the fresh air volute (200) is communicated with the filter box (400).

8. An indoor unit of an air conditioner according to claim 7, wherein the filter box (400) has an air introducing opening (430) and a maintenance opening (440), the air introducing opening (430) communicates with an outdoor environment, and the maintenance opening (440) is sealed by a detachable sealing cover (441).

9. An indoor unit of an air conditioner according to claim 8, wherein a filter module is provided in the filter box (400), and the filter module is replaceable through the maintenance port (440).

10. The indoor unit of air conditioner according to any one of claims 1 to 6, wherein the air outlet (260) of the fresh air volute (200) is disposed toward the air return opening (130) of the heat exchange casing (100).

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