CN217357186U - Indoor unit and air conditioner - Google Patents

Abstract

The application relates to the technical field of air conditioners, and discloses an indoor unit, includes: a chassis including a back plate; the volute component is arranged in the shell and comprises a front volute and a rear volute; the heat exchange assembly comprises a heat exchanger; the heat exchanger is arranged above the volute component, the head end of the heat exchanger is close to the front volute, and the tail end of the heat exchanger is close to the rear volute; the back plate is provided with a first water receiving part, and the first water receiving part is positioned below the head end of the heat exchanger and above the front volute; the back plate and the rear volute are defined in a surrounding mode to form a second water receiving portion, and the second water receiving portion is located below the tail end of the heat exchanger. Set up the comdenstion water that first water receiving portion accepted first heat exchange tube sheet on the backplate, compare in with first water receiving portion integrated into one piece in preceding spiral case, can reduce the manufacturing degree of difficulty of spiral case subassembly. The application also discloses an air conditioner.

Description

Indoor unit and air conditioner

Technical Field

The application relates to the technical field of air conditioners, for example to an indoor unit and an air conditioner.

Background

The wall-mounted air conditioner comprises an indoor unit and an outdoor unit, wherein a heat exchanger and a cross-flow fan are arranged in the indoor unit, air in the external environment enters the indoor unit from an air return opening and is subjected to heat exchange with the heat exchanger so as to be refrigerated or heated, and then the cross-flow fan blows the air subjected to heat exchange into a room from an air outlet. The air can produce the comdenstion water when taking place the heat exchange with the heat exchanger, if the comdenstion water does not collect the processing and let it drip at will, will lead to the structural component trouble in the indoor set.

The indoor unit of the wall-mounted air conditioner disclosed by the related art is internally provided with a heat exchanger and a volute component, wherein the volute component comprises a front volute, and the front volute is provided with an integrally formed water receiving disc for receiving condensed water at the head end of the heat exchanger.

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:

because the difficulty of the volute manufacturing process is higher, the front volute is integrally formed with the water receiving disc, and the manufacturing difficulty of the volute component is further increased.

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 nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides an indoor unit and an air conditioner, and solves the problem that a water receiving disc is integrally formed in a front volute so as to increase the manufacturing difficulty of a volute component.

In some embodiments, the indoor unit includes:

a chassis including a back plate;

the volute component is arranged in the shell and comprises a front volute and a rear volute;

the heat exchange assembly comprises a heat exchanger; the heat exchanger is arranged above the volute component, the head end of the heat exchanger is close to the front volute, and the tail end of the heat exchanger is close to the rear volute;

the back plate is provided with a first water receiving part, and the first water receiving part is positioned below the head end of the heat exchanger and above the front volute; the back plate and the rear volute are defined to form a second water receiving portion, and the second water receiving portion is located below the tail end of the heat exchanger.

Optionally, first water receiving portion includes:

the two supporting arms are respectively arranged at two ends of the back plate; the head end of each supporting arm is connected to the back plate, and the tail end of each supporting arm extends to the head end of the heat exchanger;

the first water pan is arranged between the two supporting arms, and two ends of the first water pan are respectively connected to the two supporting arms.

Optionally, the height of the two support arms is the same.

Optionally, each of the support arms is perpendicular to the plate surface of the back plate.

Optionally, the first water collector includes:

a front side plate adjacent to a distal end of the support arm;

the rear side plate is opposite to the front side plate and is close to the head end of the supporting arm;

wherein the rear side plate is inclined toward the head end of the support arm.

Optionally, the upper part of the front volute is a cambered surface;

the rear side plate is connected to the top end of the upper portion of the front volute, and the inclination angle of the rear side plate is parallel to the tangent line of the top end of the upper portion of the front volute.

Optionally, first water receiving portion still includes:

and the bearing plate is arranged at the upper part of the front volute and positioned below the first water pan and used for bearing the first water pan.

Optionally, the upper plate surface of the supporting plate is attached to the bottom plate of the first water receiving tray.

Optionally, the bearing plate is integrally formed with the front volute.

In some embodiments, the air conditioner includes the indoor unit according to any one of the above embodiments.

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

the first water receiving part is arranged on the back plate and used for receiving condensed water at the head end of the heat exchanger; the second water receiving part is formed by a back plate and a rear volute casing in a surrounding mode and used for receiving condensed water at the tail end of the heat exchanger. Because first water receiving portion sets up on the backplate, compare in with first water receiving portion integrated into one piece in preceding spiral case, can reduce the manufacturing degree of difficulty of spiral case subassembly.

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 in the accompanying drawings, which correspond to the accompanying drawings and not in a limiting sense, in which elements having the same reference numeral designations represent like elements, and in which:

fig. 1 is an exploded schematic view of an indoor unit according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a heat exchanger provided by an embodiment of the disclosure;

FIG. 3 is a schematic diagram of a heat exchanger from another angle provided by the disclosed embodiment;

fig. 4 is a schematic structural view of a first water receiving portion provided in the embodiment of the present disclosure;

fig. 5 is a schematic structural view of a second water receiving portion provided in the embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a rear gland provided in an embodiment of the present disclosure.

Reference numerals:

100: a housing; 110: a front cover shell; 120: a back plate;

200: a front volute; 201: a support plate; 210: a rear volute;

300: an impeller; 310: a drive motor; 320: a front gland; 330: a rear gland;

400: a three-fold heat exchanger; 410: a first heat exchange tube sheet; 420: a second heat exchange tube sheet; 430: a third heat exchange tube sheet;

500: a first water pan; 501: a front side plate; 502: a rear side plate; 503: a base plate; 510: a support arm; 520: and a second water pan.

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 in the claims, and the above-described drawings of embodiments of the present disclosure, 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 "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

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 devices, elements or components indicated 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 "up" may also be used to indicate some 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.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

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.

As shown in fig. 1-6, an indoor unit according to an embodiment of the present disclosure includes a casing 100, a volute assembly, a fan assembly, and a heat exchange assembly. Wherein, the volute assembly is arranged in the casing 100, and comprises a front volute 200 and a rear volute 210; the front volute 200 and the rear volute 210 enclose an air outlet channel; the fan assembly is arranged in the air duct; the forward volute 200 is located at the front side of the fan assembly and the aft volute 210 is located at the rear side of the fan assembly; the heat exchange assembly is arranged in the casing 100 and comprises a three-fold heat exchanger 400; the three-fold heat exchanger 400 comprises three heat exchange tube plates which are sequentially adjacent, wherein the heat exchange tube plates at the head end and the middle are arranged at the upper side of the fan assembly, and the heat exchange tube plate at the tail end is arranged at the rear side of the fan assembly; therefore, the three-folded heat exchanger 400 is avoided from the front side of the fan assembly, so that the fan assembly can be taken out after the front volute 200 is disassembled.

By adopting the layout mode of the indoor unit provided by the embodiment of the disclosure, the front volute 200 is positioned at the front side of the fan assembly, and the three-folding heat exchanger 400 avoids the front side of the fan assembly, so that the front side of the fan assembly is not shielded by the three-folding heat exchanger 400 after the front volute 200 is disassembled, and the fan assembly can be taken out from the front lower side of the three-folding heat exchanger 400 at the moment. Therefore, the fan assembly can be taken out without disassembling the three-folded heat exchanger 400, so that the fan assembly is very convenient to disassemble.

Alternatively, as shown in fig. 2, the heat exchange tube plate at the head end of the tri-fold heat exchanger 400 is referred to as a first heat exchange tube plate 410, the heat exchange tube plate in the middle of the tri-fold heat exchanger 400 is referred to as a second heat exchange tube plate 420, and the heat exchange tube plate at the tail end of the tri-fold heat exchanger 400 is referred to as a third heat exchange tube plate 430. Wherein, the first heat exchange tube plate 410 and the second heat exchange tube plate 420 are disposed at the upper side of the fan assembly, and the third heat exchange tube plate 430 is disposed at the rear side of the fan assembly. Also, first heat exchanger tube sheet 410 is adjacent to front volute 200 and third heat exchanger tube sheet 430 is adjacent to rear volute 210.

Optionally, heat exchange tubes communicated with each other are disposed inside the first heat exchange tube plate 410, the second heat exchange tube plate 420, and the third heat exchange tube plate 430, and a refrigerant flows through the heat exchange tubes. Heat exchange fins are uniformly distributed on the surfaces of the three heat exchange tube plates, the heat exchange area of the heat exchange tube plates can be increased by arranging the heat exchange fins, and the heat exchange efficiency is improved.

Optionally, as shown in fig. 1, the chassis 100 includes a back plate 120 and a front cover case 110. The top of the front housing 110 is provided with an air return inlet, and an air inlet grille is arranged at the air return inlet. Air enters the cabinet 100 from the return air inlet and exchanges heat with the three heat exchange tube plates to heat or lower the temperature of the air. An air filter screen can be arranged at the air inlet grille and can effectively filter some dust in the air. The back plate 120 is provided with a hanging structure, and the casing 100 can be hung on a wall surface through the hanging structure. When the casing 100 is hung on a wall surface, the back plate 120 is close to the wall surface, and the front cover casing 110 faces forward to the indoor.

Alternatively, the front housing 110 is detachably coupled to the back plate 120, and the front scroll 200 is coupled to the front housing 110. Thus, when the front housing 110 is disassembled, the front volute 200 can be disassembled together, and then the fan assembly can be taken out. Thus, the disassembly process of the fan assembly is further simplified.

Optionally, a flange is disposed around the front volute 200, and corresponding bolt holes are disposed on the flange and the front housing 110. The flange may be fixed to the front housing 110 using bolt fasteners adapted to the bolt holes, so that the front scroll 200 may be coupled to the front housing 110. When the front scroll 200 and the front housing 110 are disassembled together, the bolt fasteners are released to separate the two.

Optionally, the front volute 200 is integrally formed with the front housing 110. This can simplify the connection structure between the front scroll 200 and the front housing 110.

Optionally, the rear volute 210 is integrally formed with the back plate 120. This can simplify the connection structure between the rear scroll 210 and the back plate 120.

Optionally, the fan assembly includes an impeller 300, a drive motor 310, and a motor gland. The impeller 300 is a cross-flow impeller and is disposed in the air duct. The tri-fold heat exchanger 400 is recessed from the front side of the impeller 300. The driving motor 310 is disposed at one end of the impeller 300, and a driving shaft of the driving motor 310 penetrates the impeller 300. When the drive motor 310 is activated, the drive shaft rotates and causes the impeller 300 to rotate synchronously. The motor gland includes a front gland 320 and a rear gland 330, the front gland 320 is located at the front side of the driving motor 310, the rear gland 330 is located at the rear side of the driving motor 310, and the front gland 320 and the rear gland 330 are buckled to define an installation space of the driving motor 310. The front gland 320 is detachably coupled to the rear gland 330, and the rear gland 330 is integrally formed with the rear scroll 210, as shown in fig. 6. Therefore, the rear gland 330 does not need to be processed, and the driving motor 310 can be taken out only by detaching the front gland 320, so that the disassembly is convenient.

Optionally, the front gland 320 is integrally formed with the front volute 200, so that the front gland 320 can be removed together when the front volute 200 is removed. After the front gland 320 is disassembled, the front side of the driving motor 310 is not shielded. At this time, the front side of the impeller 300 is not shielded by the triple-folding heat exchanger 400, the front side of the driving motor 310 is not shielded by the front gland 320, and the impeller 300 and the driving motor 310 can be detached together, so that the difficulty in detaching the fan assembly is further reduced. The rear gland 330 is integrally formed with the rear volute 210, and the front gland 320 is integrally formed with the front volute 200, so that the front volute 200 is also fixed with the rear volute 210 when the front gland 320 is fixed to the rear gland 330.

Optionally, the front gland 320 and the front volute 200 are formed separately, and corresponding bolt holes are arranged on the front gland 320 and the rear gland 330. The front gland 320 may be fixed to the rear gland 330 using bolt fasteners fitted into bolt holes.

For the indoor unit provided by the embodiment of the present disclosure, when the front gland 320 is integrally formed on the front volute 200 and the front volute 200 is connected to the front casing 110, when the fan is dismounted: the front cover 110 is first removed to expose the components inside the cabinet 100. At this time, the front volute 200 and the front gland 320 are detached together with the front housing 110, so that the front side of the impeller 300 is not shielded by the front volute 200 and the tri-fold heat exchanger 400, and the front side of the driving motor 310 is not shielded by the front gland 320. The impeller 300 and the driving motor 310 are then taken out together from the front lower side of the triple-folding heat exchanger 400.

For the indoor unit provided by the embodiment of the present disclosure, when the front gland 320 and the front volute 200 are separately molded and the front volute 200 is connected to the front casing 110, when the fan is dismounted: the front cover 110 is first removed to expose the components inside the cabinet 100. At this time, the front volute 200 is detached together with the front housing 110, so that the front side of the impeller 300 is not shielded by the front volute 200 and the tri-fold heat exchanger 400. The front cover 320 is then removed from the rear cover 330 so that the front side of the driving motor 310 is not shielded by the front cover 320. Finally, the impeller 300 and the driving motor 310 are taken out together from the front lower side of the triple-folding heat exchanger 400.

Optionally, as shown in fig. 3, the cross section formed by the first heat exchange tube plate 410 and the second heat exchange tube plate 420 is V-shaped, so that the heat exchange area between the first heat exchange tube plate 410 and the air and the heat exchange area between the second heat exchange tube plate 420 and the air can be increased. Moreover, the opening of the V-shape faces the fan assembly, so that the condensed water on the surfaces of the first heat exchange tube plate 410 and the second heat exchange tube plate 420 can smoothly flow, and the condensed water is prevented from being stored between the two heat exchange tube plates.

Optionally, third heat exchange tube sheet 430 is disposed vertically. Because the third heat exchange tube plate 430 is located at the rear side of the fan assembly, the third heat exchange tube plate 430 is vertically arranged, so that the installation space in the casing 100 can be saved, and the volume of the indoor unit is reduced.

Optionally, the heat exchange assembly is disposed in the casing 100 and includes a heat exchanger, which includes a triple-folding heat exchanger 400; the three-folded heat exchanger 400 comprises three heat exchange tube plates which are sequentially adjacent, the heat exchange tube plate at the head end of the three-folded heat exchanger 400 is called a first heat exchange tube plate 410, the heat exchange tube plate in the middle of the three-folded heat exchanger 400 is called a second heat exchange tube plate 420, and the heat exchange tube plate at the tail end of the three-folded heat exchanger 400 is called a third heat exchange tube plate 430. Also, first heat exchanger tube sheet 410 is adjacent to front volute 200 and third heat exchanger tube sheet 430 is adjacent to rear volute 210. The back plate 120 is provided with a first water receiving portion, the first water receiving portion is located below the first heat exchange tube plate 410 and above the front volute 200, and the first water receiving portion is used for receiving condensed water on the first heat exchange tube plate 410. The back plate 120 and the rear volute 210 define a second water receiving portion, the second water receiving portion is located below the third heat exchanger tube plate 430, and the second water receiving portion is configured to receive the condensed water of the second heat exchanger tube plate 420 and the third heat exchanger tube plate 430. Thus, the first water receiving portion is arranged on the back plate 120 to receive the condensed water of the first heat exchange tube plate 410, and compared with the first water receiving portion integrally formed on the front volute 200, the manufacturing difficulty of the volute assembly can be reduced.

Optionally, as shown in fig. 4, the first water receiving portion includes two support arms 510 and a first water receiving tray 500. Wherein, the two supporting arms 510 are respectively disposed at two ends of the back plate 120; each support arm 510 has a head end connected to the back plate 120 and a tail end extending to the head end of the heat exchanger, i.e. to the first heat exchange tube plate 410; the first water pan 500 is disposed between the two support arms 510, and two ends of the first water pan 500 are respectively connected to the two support arms 510. In this way, the first water collector 500 is fixed below the first heat exchange tube plate 410 by the two support arms 510.

Optionally, the first water pan 500 is provided with a water outlet, and one end of the water outlet is communicated with the water outlet, and the other end is communicated with the external environment. Thus, the drain pipe may be used to drain the condensed water in the first drain pan 500 to the external environment.

Optionally, a liquid level alarm is disposed in the first water pan 500. The liquid level warning indicator can detect the liquid level in the first water pan 500 and send out warning sound when the liquid level exceeds the preset liquid level, so that the user is prompted that the liquid level of condensed water in the first water pan 500 is too high, and drainage needs to be performed in time.

Optionally, the height of the two support arms 510 is the same. Because the first water collector 500 is arranged between the two supporting arms 510, and the two ends of the first water collector 500 are respectively connected to the two supporting arms 510, the two supporting arms 510 are arranged at the same height, so that the first water collector 500 can be kept horizontal.

Optionally, each supporting arm 510 is perpendicular to the plate surface of the back plate 120. The support arm 510 is constructed in a plate structure, and the plate surface of the support arm 510 is perpendicular to the plate surface of the back plate 120.

Optionally, the first water receiving tray 500 is defined by a front side plate 501, a rear side plate 502, plate surfaces of the two support arms 510, and a bottom plate 503. The two support arms 510 are opposite in plate surface and respectively serve as a left side plate and a right side plate of the first water pan 500. The front side plate 501 is near the end of the support arm 510, the rear side plate 502 is opposite the front side plate 501, and the rear side plate 502 is near the head end of the support arm 510. One end of the first heat exchange tube plate 410, which is far away from the second heat exchange tube plate 420, extends into the first water collector 500.

Optionally, the rear plate 502 of the first drip tray 500 is inclined toward the head end of the support arm 510. Therefore, the projection of the pan opening of the first water pan 500 on the first heat exchange tube plate 410 can be increased, the pan opening area of the first water pan 500 is also increased, and the first water pan is favorable for receiving the condensed water on the first heat exchange tube plate 410.

Optionally, the front side plate 501 of the first water pan 500 is vertically arranged. This can save the installation space in the cabinet 100.

Optionally, the upper portion of the front volute 200 is a cambered surface, the rear side plate 502 is connected to the top end of the upper portion of the front volute 200, and the inclination angle of the rear side plate 502 is parallel to the tangent of the top end of the upper portion of the front volute 200. As shown by the tangent line in dashed lines in fig. 3. Since the rear plate 502 is connected to the top end of the upper portion of the front scroll 200, the rear plate 502 of the first drip pan 500 also forms a part of the air duct as a surrounding, and a part of the heat-exchanged air flows into the air duct along the rear plate 502. At this time, the inclination angle of the rear side plate 502 is set to be parallel to the tangent line of the top end of the upper portion of the front volute 200, which is helpful for the circulation of air in the air duct and improves the air intake efficiency of the fan assembly.

Optionally, the first water receiving portion further includes a supporting plate 201. The support plate 201 is disposed on the upper portion of the front scroll 200 and below the first drain pan 500, and is configured to support the first drain pan 500. Thus, the first heat exchange tube plate 410, the first water pan 500, the support plate 201 and the front volute 200 are sequentially arranged from top to bottom, and the support plate 201 plays a role in supporting the first water pan 500.

Optionally, the upper plate surface of the supporting plate 201 abuts against the bottom plate 503 of the first water receiving tray 500. Thus, the supporting plate 201 is favorable for supporting the first water receiving tray 500.

Optionally, the support plate 201 is integrally formed with the front volute 200. This can simplify the connection structure between the support plate 201 and the front scroll 200.

Optionally, as shown in fig. 5, the second water receiving portion includes a second water receiving tray 520, and the second water receiving tray 520 is defined by the back plate 120 and the rear scroll 210. One end of the third heat exchange tube plate 430, which is far away from the second heat exchange tube plate 420, extends into the second water pan 520, and the joint of the second heat exchange tube plate 420 and the third heat exchange tube plate 430 is located above the second water pan 520, so that the second water pan 520 can receive the condensed water of the second heat exchange tube plate 420 and the third heat exchange tube plate 430.

Optionally, the second water pan 520 is provided with a water outlet, one end of the water outlet pipe is communicated with the water outlet, and the other end of the water outlet pipe is communicated with the external environment. In this way, the drain pipe may be used to drain the condensed water in the second drain pan 520 to the external environment.

Optionally, a liquid level alarm is disposed in the second water pan 520. The liquid level warning indicator can detect the liquid level in the second water pan 520 and send out warning sound when the liquid level exceeds the preset liquid level, so that a user is prompted that the liquid level of condensed water in the second water pan 520 is too high, and drainage needs to be performed in time.

Optionally, for the layout of the tri-fold heat exchanger 400, the first heat exchange tube plate 410 is close to the front volute 200, and the third heat exchange tube plate 430 is close to the rear volute 210. The height of the front volute 200 is higher than that of the rear volute 210, the first water collector 500 is arranged below the front volute 200 and above the front volute 200, and the second water collector 520 is arranged below the rear volute 210, so that the height of the first water collector 500 is higher than that of the second water collector 520. One end of the drain pipe is connected to the first drip pan 500, and the other end is connected to the second drip pan 520. So that the condensed water in the first drip tray 500 flows to the second drip tray 520 under the action of gravity. And a drain pan is used, one end of which is communicated with the second water pan 520 and the other end of which is communicated with the external environment. Thus, the condensed water in the first drip tray 500 and the condensed water in the second drip tray 520 are collected and discharged to the external environment.

The embodiment of the disclosure provides an air conditioner, which comprises the indoor unit described in any one of the embodiments.

The above description and the 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 shown in the 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, comprising:

a chassis (100) comprising a backplane (120);

the volute assembly is arranged in the machine shell (100) and comprises a front volute (200) and a rear volute (210);

the heat exchange assembly comprises a heat exchanger; the heat exchanger is arranged above the volute assembly, the head end of the heat exchanger is close to the front volute (200), and the tail end of the heat exchanger is close to the rear volute (210);

a first water receiving part is arranged on the back plate (120), and the first water receiving part is positioned below the head end of the heat exchanger and above the front volute (200); the back plate (120) and the rear volute (210) are defined to form a second water receiving part, and the second water receiving part is located below the tail end of the heat exchanger.

2. The indoor unit according to claim 1, wherein the first water receiving portion includes:

two supporting arms (510) respectively arranged at two ends of the back plate (120); the head end of each supporting arm (510) is connected to the back plate (120), and the tail end extends to the head end of the heat exchanger;

the first water pan (500) is arranged between the two supporting arms (510), and two ends of the first water pan are respectively connected with the two supporting arms (510).

3. The indoor unit according to claim 2,

the heights of the two support arms (510) are the same.

4. The indoor unit according to claim 3, wherein,

each supporting arm (510) is perpendicular to the plate surface of the back plate (120).

5. Indoor unit according to any of claims 2 to 4, characterized in that the first drip tray (500) comprises:

a front plate (501) proximate to a distal end of the support arm (510);

a rear side plate (502) which is opposite to the front side plate (501) and is close to the head end of the supporting arm (510);

wherein the rear side plate (502) is inclined toward a head end of the support arm (510).

6. The indoor unit according to claim 5,

the upper part of the front volute (200) is a cambered surface;

the rear side plate (502) is connected to the top end of the upper portion of the front volute (200), and the inclination angle of the rear side plate (502) is parallel to the tangent of the top end of the upper portion of the front volute (200).

7. The indoor unit according to any one of claims 2 to 4, wherein the first water receiving portion further includes:

and the bearing plate (201) is arranged at the upper part of the front volute (200) and is positioned below the first water pan (500) and used for bearing the first water pan (500).

8. The indoor unit according to claim 7, wherein,

the upper plate surface of the bearing plate (201) is attached to the bottom plate (503) of the first water pan (500).

9. The indoor unit according to claim 7,

the bearing plate (201) is integrally formed on the front volute (200).

10. An air conditioner characterized by comprising an indoor unit as claimed in any one of claims 1 to 9.

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