CN217357120U - Indoor unit of air conditioner - Google Patents

Abstract

The application relates to the technical field of air conditioners, and discloses an air conditioner indoor unit, includes: heat transfer casing, new trend spiral case and biax motor. A cross-flow fan is arranged in the heat exchange shell; the fresh air volute is arranged at one end of the heat exchange shell, a centrifugal impeller is arranged in the fresh air volute, and the centrifugal impeller and the cross-flow fan are coaxially arranged; the double-shaft motor is arranged in the fresh air volute, a first output shaft of the double-shaft motor is connected with the centrifugal impeller, and a second output shaft of the double-shaft motor penetrates through the side wall of the fresh air volute to be connected with the cross flow fan. In this application, through setting up double-shaft motor between centrifugal impeller and cross-flow fan, drive centrifugal impeller and cross-flow fan simultaneously, improved centrifugal impeller and cross-flow fan's drive stability, set up double-shaft motor in the new trend spiral case in addition, can reduce the ascending length of air conditioning indoor set axial, make its structure compacter, reduce the installation degree of difficulty and manufacturing cost.

Description

Indoor unit of air conditioner

Technical Field

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

Background

At present, an air conditioner is used by more and more users as common household electrical appliances, the existing air conditioner mostly adopts a single cross-flow fan to drive gas circulation, and heat exchange is carried out between circulating gas and a heat exchanger, so that the purpose of cooling and heating the indoor environment is achieved, but the indoor environment is mostly in a closed state for ensuring the temperature regulation efficiency of the indoor environment, the air quality of the indoor environment is reduced after the air conditioner works for a long time, and therefore outdoor fresh air needs to be introduced to improve the air quality of the indoor environment.

A fresh air system comprises a cross flow fan and a fresh air fan coaxially connected with the cross flow fan, wherein an air inlet of the fresh air fan is communicated with an outdoor environment, a driving motor is arranged at one end of the cross flow fan to drive the cross flow fan and the fresh air fan to rotate simultaneously, and outdoor fresh air is introduced to improve the air quality of the indoor environment while refrigerating 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:

through set up driving motor in cross-flow fan's one end, can increase cross-flow fan axial ascending length, and then increase the holistic volume of air conditioning indoor set, improve the installation degree of difficulty and manufacturing cost.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended to be a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides an air-conditioning indoor unit, which is used for reducing the axial length of the air-conditioning indoor unit, enabling the structure of the air-conditioning indoor unit to be more compact and reducing the installation difficulty and the production cost.

In some embodiments, an air conditioning indoor unit includes: heat transfer casing, new trend spiral case and biax motor. A cross-flow fan is arranged in the heat exchange shell; the fresh air volute is arranged at one end of the heat exchange shell, a centrifugal impeller is arranged in the fresh air volute, and the centrifugal impeller and the cross-flow fan are coaxially arranged; the double-shaft motor is arranged in the fresh air volute, a first output shaft of the double-shaft motor is connected with the centrifugal impeller, and a second output shaft of the double-shaft motor penetrates through the side wall of the fresh air volute to be connected with the cross-flow fan.

Optionally, the fresh air volute comprises: a volute housing and a volute cover. The volute body is arranged at one end of the heat exchange shell; the worm shell cover is detachably connected with the worm shell body, a cavity is defined by the worm shell cover and the worm shell body together, and the centrifugal impeller and the double-shaft motor are arranged in the cavity.

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

Optionally, the inner wall of the fresh air volute is provided with a mounting sleeve, and the double-shaft motor is mounted in the mounting sleeve.

Optionally, an annular connecting seat adapted to the mounting sleeve is disposed at an axial center of the centrifugal impeller, the mounting sleeve is sleeved with the annular connecting seat, and an end of the first output shaft is fixedly connected to the annular connecting seat.

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

Optionally, a filter box is arranged on a side wall of the fresh air volute, which faces away from the heat exchange shell, and an air inlet of the fresh air volute is communicated with the filter box.

Optionally, the filtration tank has an air induction port and a maintenance port, the air induction port communicates with the outdoor environment, and the maintenance port is sealed by a detachable sealing cover.

Optionally, be equipped with filter module in the rose box, filter module accessible maintenance mouth is changed.

Optionally, the air outlet of the fresh air volute is arranged towards the air return opening of the heat exchange shell.

The air-conditioning indoor unit provided by the embodiment of the disclosure can realize the following technical effects:

the fresh air volute is arranged at one end of the heat exchange shell, outdoor fresh air is introduced to improve the air quality of the indoor environment while the indoor environment is refrigerated and heated by utilizing the matching of the heat exchange shell and the fresh air volute, the centrifugal impeller and the cross flow fan are driven simultaneously by arranging the double-shaft motor between the centrifugal impeller and the cross flow fan, the driving stability of the centrifugal impeller and the cross flow fan is improved, the double-shaft motor is arranged in the fresh air volute, the axial length of an indoor unit of an air conditioner can be reduced, the structure of the air conditioner is more compact, and the installation difficulty and the production cost are reduced.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

fig. 1 is a cross-sectional view of an indoor unit of an air conditioner according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of an air conditioner indoor unit according to an embodiment of the present disclosure;

FIG. 3 is an exploded schematic view of a fresh air volute provided by embodiments of the present disclosure;

FIG. 4 is a schematic structural view of a centrifugal impeller and a mounting sleeve provided by an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a two-shaft motor provided in an embodiment of the present disclosure;

fig. 6 is a schematic structural view of another air conditioner indoor unit provided by the embodiment of the disclosure;

FIG. 7 is a schematic structural diagram of a filter box provided by the embodiment of the disclosure;

fig. 8 is a schematic structural view of another air conditioning indoor unit provided in the embodiment of the present disclosure.

Reference numerals are as follows:

100. a heat exchange housing; 110. a cross-flow fan; 120. a bearing seat; 130. an air return opening;

200. a fresh air volute; 210. a centrifugal impeller; 211. an annular connecting seat; 220. a volute housing; 221. a screw seat; 222. clamping convex; 230. a worm case cover; 231. a through hole seat; 232. buckling; 240. installing a sleeve; 250. an air inlet; 260. an air outlet;

300. a dual-axis motor; 310. a first output shaft; 320. a second output shaft;

400. a filter box; 410. a box cover; 420. a box body; 430. an air inducing port; 440. maintaining the mouth; 441. and (7) sealing the cover.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order 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 in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and claims of the embodiments of the disclosure and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

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

Referring to fig. 1 to 8, an embodiment of the present disclosure provides an indoor unit of an air conditioner, including: heat exchange shell 100, new trend spiral case 200 and biax motor 300. A cross flow fan 110 is arranged in the heat exchange shell 100; the fresh air volute 200 is arranged at one end of the heat exchange shell 100, a centrifugal impeller 210 is arranged inside the fresh air volute 200, and the centrifugal impeller 210 and the cross flow fan 110 are coaxially arranged; the dual-shaft motor 300 is disposed in the fresh air volute 200, a first output shaft 310 of the dual-shaft motor 300 is connected to the centrifugal impeller 210, and a second output shaft 320 of the dual-shaft motor 300 passes through the sidewall of the fresh air volute 200 and is connected to the cross flow fan 110.

According to the indoor unit of the air conditioner in the embodiment of the disclosure, the fresh air volute 200 is arranged at one end of the heat exchange shell 100, outdoor fresh air is introduced to improve the air quality of an indoor environment while refrigerating and heating the indoor environment by utilizing the matching of the heat exchange shell 100 and the fresh air volute 200, the centrifugal impeller 210 and the cross flow fan 110 are driven by arranging the double-shaft motor 300 between the centrifugal impeller 210 and the cross flow fan 110, the driving stability of the centrifugal impeller 210 and the cross flow fan 110 is improved, and the length of the indoor unit of the air conditioner in the axial direction can be reduced by arranging the double-shaft motor 300 in the fresh air volute 200, so that the structure of the indoor unit of the air conditioner is more compact, and the installation difficulty and the production cost are reduced.

As shown in connection with fig. 2 and 3, in some embodiments, the fresh air volute 200 includes: a volute housing 220 and a volute cover 230. The volute casing 220 is arranged at one end of the heat exchange casing 100; the volute cover 230 is detachably connected with the volute casing 220, the volute cover 230 and the volute casing 220 jointly define a cavity, and the centrifugal impeller 210 and the dual-shaft motor 300 are both arranged in the cavity. Like this, divide into volute casing 220 and volute cover 230 two parts with new trend spiral case 200, detachable installation between volute cover 230 and the volute casing 220 is convenient for install centrifugal impeller 210 and double-shaft motor 300 in the cavity, takes place the condition of damaging at the inside centrifugal impeller 210 of new trend spiral case 200 and double-shaft motor 300, is convenient for dismantle new trend spiral case 200 and maintain.

Optionally, the volute casing 220 is integrally formed with the heat exchange casing 100. Therefore, in order to improve the stability of the whole air conditioner indoor unit, the volute 220 arranged at one end of the heat exchange shell 100 is integrally formed with the heat exchange shell 100, so that the strength between the volute 220 and the heat exchange shell 100 can be improved, the stability is improved, and the production is convenient.

Alternatively, the outer wall of the casing 220 is provided with screw seats 221, the outer wall of the casing cover 230 is provided with through hole seats 231 corresponding to the positions of the screw seats 221, and the casing cover 230 is assembled with the casing 220 by screws. In this way, the volute cover 230 is more firmly fixed to the volute casing 220 by inserting screws into the screw seats through the through hole seats 231, thereby improving the stability of the fresh air volute 200.

Specifically, the screw seat 221 is disposed on the radial outer wall of the volute casing 220, the through hole seat 231 is disposed on the radial outer wall of the volute cover 230, and the screw seat 221 and the through hole seat 231 are disposed in plurality and uniformly distributed along the outer walls of the volute casing 220 and the volute cover 230, respectively. Further improving the stability of the connection between the volute casing 220 and the volute cover 230.

Optionally, the outer wall of the volute cover 230 is provided with a catch 232 protruding toward the volute casing 220, and the outer wall of the volute casing 220 is provided with a catch protrusion 222 corresponding to the position of the catch 232. Thus, the worm casing cover 230 is connected with the worm casing 220 by the connection mode that the buckle 232 is clamped on the clamping boss 222, so that the worm casing cover 230 is clamped on the worm casing 220 more fittingly, the through hole seat 231 on the worm casing cover 230 is positioned, the through hole seat 231 on the worm casing cover 230 is attached to the screw seat 221 on the worm casing 220 more accurately, and the worm casing cover 230 is fixed on the worm casing 220 conveniently through screws.

Referring to fig. 4 and 5, in some embodiments, the inner wall of the fresh air scroll 200 is provided with a mounting sleeve 240, and the dual-shaft motor 300 is mounted in the mounting sleeve 240. Like this, set up installation sleeve 240 in new trend spiral case 200, install double-shaft motor 300 in installation sleeve 240, can improve double-shaft motor 300's installation stability, reduce the tremble that double-shaft motor 300 during operation produced, can also reduce new trend spiral case 200 ascending thickness in the axial to reduce the holistic length of this air conditioning indoor set, make its structure compacter, reduce the installation degree of difficulty and manufacturing cost.

Optionally, the mounting sleeve 240 is fixedly disposed on the side wall of the volute casing 220, both ends of the mounting sleeve 240 in the axial direction have openings, the opening of the first output shaft 310 of the dual-shaft motor 300, which extends out of one end of the mounting sleeve 240 in the axial direction, is connected to the centrifugal impeller 210, and the opening of the second output shaft 320, which extends out of the other end of the mounting sleeve 240 in the axial direction, extends into the heat exchange casing 100 and is connected to the cross-flow fan 110. In this way, the mounting sleeve 240 is disposed on the side wall of the volute casing 220, so that the first output shaft 310 and the second output shaft 320 of the dual-shaft motor 300 disposed in the mounting sleeve 240 are respectively connected to the centrifugal impeller 210 and the cross-flow fan 110, and the air inlet end of the centrifugal impeller 210 after connection is disposed toward the volute casing cover 230, so as to facilitate the communication between the fresh air volute 200 and the outdoor environment.

Optionally, 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. Thus, the annular connecting seat 211 is arranged at the axle center of the centrifugal impeller 210, so that the centrifugal impeller 210 is connected with the first output shaft 310 of the double-shaft motor 300 through the annular connecting seat 211, the annular connecting seat 211 can be sleeved outside the mounting sleeve 240, the mounting sleeve 240 and the double-shaft motor 300 arranged in the mounting sleeve 240 are surrounded, the mounting sleeve 240 is hidden at the axle center of the centrifugal impeller 210, the occupied air conditioner of the mounting sleeve 240 and the double-shaft motor 300 in the fresh air volute 200 is reduced, the thickness of the axle center of the fresh air volute 200 is reduced, the integral length of the indoor unit of the air conditioner is reduced, the structure of the indoor unit of the air conditioner is more compact, and the mounting difficulty and the production cost are reduced.

Alternatively, the annular coupling seat 211 has a through hole at an end facing the volute 220, and a rim of the through hole is coupled to an end of the centrifugal impeller 210 facing a sidewall of the volute 220 through a coupling plate. Like this, annular connecting seat 211 passes through the through-hole cover to be established in installation sleeve 240 outsidely, and the border of the through-hole of annular connecting seat 211 passes through the connecting plate to be connected with centrifugal impeller 210's one end, can improve centrifugal impeller 210's stability. Specifically, the end of the annular connecting seat 211 facing away from the worm casing 220 has a mounting plate, and the first output shaft 310 is connected to the center of the mounting plate.

Optionally, an end surface of the annular connecting seat 211 facing the volute casing 220 and an end surface of the centrifugal impeller 210 facing the volute casing 220 are in the same plane, a thickness of the annular connecting seat 211 in the axial direction is smaller than or equal to a thickness of the centrifugal impeller 210 in the axial direction, and the thickness of the annular connecting seat 211 in the axial direction is greater than or equal to a thickness of the mounting sleeve 240 in the axial direction. Like this, make annular connecting seat 211 can hide in centrifugal impeller 210's inside, the thickness of annular connecting seat 211 and the thickness looks adaptation of installation sleeve 240, better utilize annular connecting seat 211 to surround installation sleeve 240 and the double-shaft motor 300 of setting in its inside, hide annular connecting seat 211, installation sleeve 240 and double-shaft motor 300, reduce the ascending thickness of new trend spiral case 200 axle.

Specifically, in order to ensure the normal rotation of the installed centrifugal impeller 210, a gap is formed between an end surface of the centrifugal impeller 210 facing the volute casing 220 in the axial direction and a side wall of the volute casing 220, and a gap is also formed between an inner annular wall of the annular connecting seat 211 and an outer peripheral wall of the installation sleeve 240.

Alternatively, the inner circumferential wall of the mounting sleeve 240 is provided with a cushion ring, and the outer circumferential wall of the biaxial motor 300 is in contact with the cushion ring. In this way, the outer circumferential wall of the biaxial motor 300 is brought into contact with the inner circumferential wall of the mounting sleeve 240 through the cushion washer, thereby reducing vibration generated during operation of the biaxial motor 300.

In some embodiments, a bearing seat 120 is provided on the side wall of the heat exchange housing 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. The bearing seat 120 is used for supporting and limiting the second output shaft 320, so that the driving stability of the second output shaft 320 is improved, the bearing seat 120 can also support the axial direction of the cross flow fan 110, and the axial direction offset of the cross flow fan 110 is avoided.

Optionally, a heat exchanger is further disposed 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 housing 100, and the air flow flowing into the heat exchange housing 100 can exchange heat with the heat exchanger to form heat exchange air flow to be blown into the indoor environment, so as to adjust the temperature of the indoor environment.

Referring to fig. 6 and 7, in some embodiments, 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 the air inlet 250 of the fresh air volute 200 is communicated with the filter box 400. In this way, the centrifugal impeller 210 in the fresh air scroll 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 sucked outdoor air flow is filtered by the filter box 400, thereby improving the quality of the outdoor air flow introduced into the room and further improving the air quality of the indoor environment.

Optionally, the filter tank 400 comprises: a case cover 410 and a case body 420. The case cover 410 is detachably connected with the case body 420, and the case cover 410 and the volute cover 230 are integrally formed. Thus, the filter box 400 is convenient to detach and mount, the strength of the box cover 410 and the volute cover 230 in an integrally formed structure is high, and the stability between the filter box 400 and the fresh air volute 200 is improved.

Optionally, the air inlet 250 of the fresh air volute 200 is located on a side wall of the volute cover 230, and the air inlet 250 is a through opening structure penetrating through the volute cover 230 and the case cover 410. Thus, the case cover 410 and the volute cover 230 are integrally formed, so that the air inlet 250 is arranged to penetrate through the through port structures of the case cover 410 and the volute cover 230, the fresh air volute 200 and the filter case 400 are conveniently communicated, and loss of air pressure is reduced.

Optionally, the air intake end of the centrifugal impeller 210 is disposed toward the air intake 250. Therefore, negative pressure generated by the rotation of the centrifugal impeller 210 can better act on the air inlet 250, the loss of air pressure is reduced, and the air inducing efficiency is improved.

Optionally, the filter box 400 has an air induction opening 430 and a maintenance opening 440, the air induction opening 430 communicates with the outdoor environment, and the maintenance opening 440 is sealed by a detachable sealing cover 441. Thus, when the centrifugal impeller 210 in the fresh air volute 200 rotates, negative pressure is generated in the filter box 400 through the air inlet 250, outdoor air flow is introduced from the air inlet 430 under the action of the negative pressure, the outdoor air flow is filtered when flowing through the filter box 400, the quality of the introduced outdoor air flow is improved, the filter box 400 can be maintained and maintained through the maintenance port 440, the maintenance port 440 is sealed through the sealing cover 441, and air leakage at the maintenance port 440 is prevented from causing negative pressure loss in the filter box 400.

Optionally, a filter module is disposed in the filter box 400, and the filter module can be replaced through the maintenance opening 440. Like this, can filter the outdoor air current of through filter box 400 through filtering module, improve the quality of the outdoor air current of introducing, dismantle filtering module through maintenance mouth 440 regularly and wash and change, improved user's experience. Specifically, the filtering module is an activated carbon adsorption pad.

Optionally, the induced draft opening 430 is disposed on a sidewall of the filter box 400 perpendicular to the intake opening 250. Therefore, the air flow introduced through the induced draft opening 430 can flow into the filter module along the direction perpendicular to the air inlet 250, and then flow into the fresh air volute 200 through the air inlet 250, so that the flowing time of the outdoor air flow in the filter module is prolonged, and the filtering effect is improved.

As shown in fig. 8, in some embodiments, the air outlet 260 of the fresh air volute 200 is disposed towards the air return opening 130 of the heat exchange housing 100. Thus, because the temperature difference exists between the outdoor environment and the indoor environment, the air outlet 260 of the fresh air volute 200 is arranged towards the air return opening 130 of the heat exchange shell 100, so that the outdoor air flow introduced through the fresh air volute 200 can flow to the air return opening 130, flows into the heat exchange shell 100 through the air return opening 130 for heat exchange, and then is blown into the indoor environment, thereby reducing the fluctuation of the air outlet temperature of the indoor unit of the air conditioner and improving the air outlet comfort.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and illustrated in the drawings, and various modifications and changes can 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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