CN219934111U

CN219934111U - Indoor unit of air conditioner

Info

Publication number: CN219934111U
Application number: CN202321482818.2U
Authority: CN
Inventors: 杨宇
Original assignee: Hisense Guangdong Air Conditioning Co Ltd
Current assignee: Hisense Guangdong Air Conditioning Co Ltd
Priority date: 2023-06-09
Filing date: 2023-06-09
Publication date: 2023-10-31
Anticipated expiration: 2033-06-09

Abstract

The utility model discloses an air conditioner indoor unit, which comprises: the shell is provided with an air inlet and an air outlet; a heat exchanger; a blower; the volute tongue comprises an air outlet section, a backflow section and a protruding section, wherein the backflow section is positioned in the shell and extends around the circumference of the fan, the backflow section is provided with a first side and a second side in the circumference of the fan, the first side is adjacent to the air outlet relative to the second side and is connected with the air outlet section, the air outlet section extends towards the direction close to the air outlet, and the second side is connected with the protruding section; wherein, the protruding section keep away from one side of backward flow section is equipped with crest portion and trough portion, crest portion and trough portion are arranged and are connected along the axial of fan in turn, and trough portion structure is the arc that is protruding and the center is sunken at the epaxial both ends of fan. The indoor unit of the air conditioner provided by the embodiment of the utility model can avoid resonance between the back flow and the inlet air flow, and has the advantages of good air guiding effect, low running noise and the like.

Description

Indoor unit of air conditioner

Technical Field

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

Background

The indoor unit of the air conditioner in the related art is generally provided with a volute tongue, and the volute tongue can guide the air flow of the fan so that a part of the air flow can flow to the air outlet more smoothly, and the other part of the air flow flows back to enter the fan again and is guided by the fan to be blown to the air outlet so as to increase the air quantity of the fan. However, due to unreasonable structural arrangement of the volute tongue in the related art, the back flow is easy to interfere with the air inlet flow of the air inlet of the indoor unit of the air conditioner to generate resonance, abnormal noise is caused, and the air guiding effect is poor.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide an indoor unit of an air conditioner, which can avoid resonance between a return air flow and an intake air flow, and has the advantages of good air guiding effect, low operation noise, and the like.

In order to achieve the above object, according to an embodiment of the present utility model, there is provided an indoor unit of an air conditioner, including: the shell is provided with an air inlet and an air outlet; the heat exchanger is arranged in the shell and is used for exchanging heat with indoor air; the fan is arranged in the shell, and the indoor air is guided into the shell from the air inlet through the operation of the fan, exchanges heat through the heat exchanger and is then guided back into the room from the air outlet; the volute tongue comprises an air outlet section, a backflow section and a protruding section, wherein the backflow section is positioned in the shell and extends around the circumference of the fan, the backflow section is provided with a first side edge and a second side edge in the circumference of the fan, the first side edge is adjacent to the air outlet relative to the second side edge and is connected with the air outlet section, the air outlet section extends towards the direction close to the air outlet, and the second side edge is connected with the protruding section; the fan comprises a fan body, a fan body and a fan, wherein one side of the protruding section, which is far away from the backflow section, is provided with a wave crest part and a wave trough part, the wave crest part and the wave trough part are alternately arranged and connected along the axial direction of the fan, and the wave trough part is in an arc shape with protruding two ends and recessed center in the axial direction of the fan.

The indoor unit of the air conditioner provided by the embodiment of the utility model can avoid resonance between the back flow and the inlet air flow, and has the advantages of good air guiding effect, low running noise and the like.

According to some embodiments of the utility model, the number of wave troughs and the number of wave crests are both odd numbers greater than 1.

According to some embodiments of the utility model, a side of the peak portion remote from the return section is planar or curved.

According to some embodiments of the utility model, the thickness of the raised section is less than the thickness of the return section.

According to some embodiments of the utility model, a side of the convex section facing the fan and a side of the return section facing the fan transition smoothly.

According to some embodiments of the utility model, the trough has a dimension L1 in the length direction of the convex section and the crest has a dimension L2 in the length direction of the convex section; wherein 1< L1/L2<6.

According to some embodiments of the utility model, the trough has a dimension L3 in the width direction of the convex section and the crest has a dimension L2 over the length of the convex section; wherein 1< L3/L2<8.

According to some embodiments of the utility model, a dimension of a side of the trough facing away from the fan in a circumferential direction of the fan is smaller than a dimension of a side of the trough facing toward the fan in the circumferential direction of the fan.

According to some embodiments of the utility model, a dimension of a side of the peak facing away from the fan in a circumferential direction of the fan is smaller than a dimension of a side of the peak facing toward the fan in the circumferential direction of the fan.

According to some embodiments of the utility model, the volute tongue is provided with a first reinforcing rib and a plurality of second reinforcing ribs, the first reinforcing rib is arranged on one side of the backflow section, which is opposite to the fan, and is adjacent to the second side edge, the second reinforcing rib is arranged on one side of the backflow section, which is opposite to the fan, and one side of the air outlet section, which is opposite to the fan, and the plurality of second reinforcing ribs are arranged at intervals along the axial direction of the fan, and are connected with the first reinforcing ribs.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic view of a structure of an indoor unit of an air conditioner according to an embodiment of the present utility model;

fig. 2 is a cross-sectional view of an indoor unit of an air conditioner according to an embodiment of the present utility model;

FIG. 3 is a detailed view at A of FIG. 2;

fig. 4 is a schematic view illustrating a structure of a volute tongue of an indoor unit of an air conditioner according to an embodiment of the present utility model;

fig. 5 is a detailed view at B of fig. 4;

fig. 6 is a schematic view showing a structure of another view of a volute tongue of an indoor unit of an air conditioner according to an embodiment of the present utility model;

FIG. 7 is a detailed view at C of FIG. 6;

fig. 8 is a schematic view showing a structure of a volute tongue of an indoor unit of an air conditioner according to still another view angle of an embodiment of the present utility model;

fig. 9 is a cross-sectional view of a volute tongue of an indoor unit of an air conditioner according to an embodiment of the utility model.

Reference numerals:

1. an air conditioner indoor unit;

100. a housing; 110. an air inlet; 120. an air outlet;

200. a heat exchanger; 300. a blower;

400. a volute tongue; 410. an air outlet section; 420. a reflux section; 421. a first side; 422. a second side; 430. a convex section; 431. a peak portion; 432. trough parts; 440. a connection section; 450. a first reinforcing rib; 460. and a second reinforcing rib.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the utility model, a "first feature" or "second feature" may include one or more of such features.

In the description of the utility model, "a plurality" means two or more, and "a number" means one or more.

An air conditioner indoor unit 1 according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1 to 9, an indoor unit 1 of an air conditioner according to an embodiment of the present utility model includes a housing 100, a heat exchanger 200, a fan 300, and a volute tongue 400.

The casing 100 is provided with an air inlet 110 and an air outlet 120, the heat exchanger 200 is arranged in the casing 100 and is used for exchanging heat with indoor air, the fan 300 is arranged in the casing 100, the indoor air is guided into the casing 100 from the air inlet 110 through the operation of the fan 300 and exchanges heat through the heat exchanger 200 and is then guided back into the room from the air outlet 120, the volute tongue 400 comprises an air outlet section 410, a reflux section 420 and a protruding section 430, the reflux section 420 is arranged in the casing 100 and extends around the circumference of the fan 300, the reflux section 420 is provided with a first side 421 and a second side 422 in the circumference of the fan 300, the first side 421 is adjacent to the air outlet 120 relative to the second side 422 and is connected with the air outlet section 410, the air outlet section 410 extends towards the direction close to the air outlet 120, and the second side 422 is connected with the protruding section 430. Wherein, a side of the protruding section 430, which is far from the backflow section 420, is provided with a peak portion 431 and a trough portion 432, the peak portion 431 and the trough portion 432 are alternately arranged and connected along the axial direction of the blower 300, and the trough portion 432 is configured as an arc shape protruding at both ends in the axial direction of the blower 300 and recessed at the center.

The indoor unit 1 of the air conditioner in the embodiment of the utility model may be a wall-mounted indoor unit 1 of the air conditioner. The volute tongue 400 may be fixedly connected to the casing 100, so that the position of the volute tongue 400 may be fixed, so as to fix the relative positions of the volute tongue 400 and the fan 300.

According to the indoor unit 1 of the air conditioner in the embodiment of the utility model, the air inlet 110 and the air outlet 120 are provided in the casing 100, the heat exchanger 200 is provided in the casing 100 for exchanging heat with indoor air, the fan 300 is provided in the casing 100, the indoor air is guided into the casing 100 from the air inlet 110 through the operation of the fan 300, exchanges heat through the heat exchanger 200, and is guided back into the room from the air outlet 120, so that the indoor unit 1 of the air conditioner can introduce the indoor air into the casing 100 through the air inlet 110, and after exchanging heat with the heat exchanger 200 to form a heat exchange airflow, the heat exchange airflow can flow into the room through the air outlet 120 along with the rotation of the fan 300, so as to cool or heat the room.

In addition, the volute tongue 400 includes an air outlet segment 410, a backflow segment 420 and a protruding segment 430, the backflow segment 420 is located in the casing 100 and extends around the circumference of the fan 300, the backflow segment 420 has a first side 421 and a second side 422 in the circumference of the fan 300, the first side 421 is adjacent to the air outlet 120 relative to the second side 422 and is connected with the air outlet segment 410, the air outlet segment 410 extends in a direction close to the air outlet 120, and the second side 422 is connected with the protruding segment 430.

Specifically, the air outlet section 410 is configured to guide the air flow generated by the rotation of the fan 300 to the air outlet 120, so that the air outlet of the indoor unit 1 of the air conditioner is smoother, the air outlet effect is better, the backflow section 420 can guide part of the air flow of the fan 300 back to the fan 300 again, and the part of the backflow air flow can be guided by the fan 300 to flow to the air outlet 120 together with the air inlet of the air inlet 110, so that the air volume of the fan 300 is improved, and the air outlet volume of the indoor unit 1 of the air conditioner can be improved.

In addition, the protruding section 430 is provided with a crest portion 431 and a trough portion 432 on a side far from the backflow section 420, the crest portion 431 and the trough portion 432 are alternately arranged and connected along the axial direction of the fan 300, the trough portion 432 is configured into an arc shape with convex ends and concave centers in the axial direction of the fan 300, it is understood that by arranging the protruding section 430 into the crest portion 431 and the trough portion 432 with different heights, when the backflow airflow flows through the backflow section 420 to the protruding section 430, the flow velocity and the direction of the airflow flowing through the crest portion 431 and the airflow flowing through the trough portion 432 are different, that is, the backflow airflow can be scattered by the crest portion 431 and the trough portion 432, so that the backflow airflow flowing through the protruding section 430 can have different outflow velocities, and further, the phase difference of wind speeds can be generated in the axial direction of the fan 300 in the embodiment of the utility model, so that airflow resonance is not easy to generate between the backflow airflow and the air inlet airflow, noise generated by the airflow resonance is effectively reduced, and the running noise of the indoor unit 1 of the air conditioner is smaller.

And, curved trough portion 432 can make the direction of the air current of flowing through trough portion 432 be the layering change, trough portion 432 breaks up the effect of air current better, because curved trough portion 432's the extending direction of different positions is different, the air current that is guided by different positions of trough can flow to different directions, and the air current direction continuous variation, still further avoided backward flow air and air inlet air to appear resonance, not only be favorable to reducing the noise of air current resonance, and the wind-guiding effect that makes fan 300 is also better, the wind-guiding effect of air conditioner indoor set 1 can be obviously promoted, the air-out is more smooth and easy.

Thus, the indoor unit 1 of the air conditioner can avoid resonance between the back flow and the inlet air flow, and has the advantages of good air guiding effect, low running noise and the like.

In some embodiments of the present utility model, as shown in fig. 4 and 5, the number of trough portions 432 and the number of peak portions 431 are each an odd number greater than 1. That is, the number of the valley portions 432 is an odd number greater than 1, and the number of the peak portions 431 is an odd number greater than 1.

That is, the plurality of odd-numbered trough portions 432 and the plurality of peak portions 431 are alternately arranged along the axial direction of the blower 300, so that adjacent trough portions 432 and peak portions 431 can scatter adjacent airflows to generate a phase difference in the axial direction of the blower 300, and the odd-numbered trough portions 432 can avoid overlapping frequencies of the impact of the backflow airflows on the volute tongue 400, and the odd-numbered peak portions 431 can avoid overlapping frequencies of the impact of the backflow airflows on the volute tongue 400, thereby further reducing the probability of occurrence of resonance of the airflows.

In addition, when the number of the trough portions 432 and the peak portions 431 is calculated, one integral trough portion 432 is generally referred to as one trough portion 432, and one integral peak portion 431 is referred to as one peak portion 431, but since the peak portion 431 and the trough portion 432 are both odd numbers, one trough portion 432 is necessarily located on the outer side of the convex section 430 in the axial direction of the fan 300, and in order to improve the structural strength of the convex section 430, the outermost trough portion 432 may be omitted by half, so that the structural strength of the convex section 430 may be higher, and the frequency superposition of the impact of the airflow flowing through the trough portion 432 on the volute tongue 400 may be avoided.

In some embodiments of the present utility model, as shown in fig. 5 and 7, a side of the peak 431 away from the return section 420 is planar or curved.

It can be appreciated that, no matter the side surface of the peak portion 431 far away from the backflow section 420 is a plane or a curved surface, that is, no matter the end surface of the peak portion 431 is a plane or a curved surface, the end portion of the peak portion 431 is prevented from being in a "tip" structure, the peak portion 431 is not easy to be broken or broken, and further the peak portion 431 is prevented from being deformed to touch the fan 300, which is beneficial to improving the operation safety of the indoor unit 1 of the air conditioner.

In addition, if a side surface of the peak portion 431 away from the reflow section 420 is provided as a plane, the structure of the end surface of the peak portion 431 can be simplified, and further the structure of the peak portion 431 is simplified, so that the processing is facilitated, and if a side surface of the peak portion 431 away from the reflow section 420 is provided as a curved surface, the airflow direction of the end surface flowing through the peak portion 431 can also be changed in a layered manner, the effect of the peak portion 431 on the scattering airflow direction is better, and further the occurrence of resonance between the reflow and the intake air is avoided.

In some embodiments of the present utility model, as shown in fig. 7, the thickness of the protruding section 430 is smaller than that of the reflow section 420, so that the thickness of the protruding section 430 can be thinner, which not only can reduce the proportion of the protruding section 430 that is deformed by shrinkage during processing, so that the protruding section 430 is not easy to deform during processing, but also is beneficial to reducing the weight of the protruding section 430, and less material for the protruding section 430, which is beneficial to saving the processing cost of the volute tongue 400.

In addition, by setting the thickness of the backflow section 420 to be greater than the thickness of the protrusion section 430, the structural strength of the backflow section 420 can be higher, and thus the overall structural strength of the volute tongue 400 can be ensured to be higher.

In some embodiments of the present utility model, as shown in fig. 3 and fig. 7, a side of the protruding section 430 facing the fan 300 and a side of the backflow section 420 facing the fan 300 are smoothly transited, so that not only can a structure of the side of the volute tongue 400 facing the fan 300 be simplified, but also the direction of the backflow air flow is not changed suddenly in the process of flowing from the backflow section 420 to the protruding section 430, the flow guiding effect of the volute tongue 400 on the backflow air flow is better, the flow of the backflow air flow is smoother, the flow of the backflow air flow is favorable to be improved, the air guiding quantity of the fan 300 can be improved, and the air outlet quantity of the indoor unit 1 of the air conditioner can be larger.

In some embodiments of the present utility model, as shown in fig. 5, the dimension of the trough 432 in the length direction of the convex section 430 is L1, and the dimension of the crest 431 in the length direction of the convex section 430 is L2. Wherein 1< L1/L2<6. That is, L1/L2 may be 1.5, 2, 2.5, 3, 3.5, 4, 4.5, or 5.

The length direction of the protruding section 430 refers to a direction of the protruding section 430 extending in the axial direction of the fan 300.

In this way, the ratio of the trough portion 432 to the crest portion 431 in the length direction of the protruding section 430 is more coordinated, on one hand, the size of the crest portion 431 in the length direction of the protruding section 430 can be prevented from being too small, so that more backflow air flows can flow through the crest portion 431, the flow distribution of the air flows through the crest portion 431 and the air flows through the trough portion 432 is more uniform, resonance between the backflow air flows and the air inlet air flows is more effectively avoided, on the other hand, the size of the trough portion 432 in the length direction of the protruding section 430 can be prevented from being too small, the air inlet space of the trough portion 432 in the axial direction of the fan 300 can be increased, noise generated by air flow resonance can be improved, meanwhile, the air quantity of the backflow air flows can be increased, and the air guiding air quantity of the fan 300 is larger, and the air outlet effect is better.

In some embodiments of the present utility model, as shown in fig. 5, the dimension of the trough 432 in the width direction of the convex section 430 is L3, and the dimension of the crest 431 in the length direction of the convex section 430 is L2; wherein 1< L3/L2<8. That is, L3/L2 may be 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, or 8.

The width direction of the convex section 430 refers to a direction of the convex section 430 extending in the circumferential direction of the fan 300.

In this way, the size of the trough portion 432 in the width direction of the protruding section 430 may be larger, so that the height difference between the trough portion 432 and the crest portion 431 in the width direction of the protruding section 430 may be more effectively increased, and further, the airflow velocity flowing through the trough portion 432 and the airflow velocity flowing through the crest portion 431 may be significantly different, and further, resonance between the backflow airflow and the intake airflow may be further avoided.

In some embodiments of the present utility model, as shown in FIG. 3, the dimension of the side of the trough 432 facing away from the blower 300 in the circumferential direction of the blower 300 is smaller than the dimension of the side of the trough 432 facing the blower 300 in the circumferential direction of the blower 300.

The size in the circumferential direction of the fan 300 of the side that is close to the fan 300 of trough portion 432 is shorter like this, and the size in the circumferential direction of the fan 300 of the side that is away from the fan 300 of trough portion 432 is longer, and the one side surface that is away from back flow section 420 of trough portion 432 can incline for the thickness direction of protruding section 430 like this, and the terminal surface area of trough portion 432 is bigger, and the air current can be diffused in advance when flowing through trough portion 432, and then can reduce the velocity of flow of the backward flow air current that flows through trough portion 432, avoids the air current to strike too big, is favorable to increasing the air inlet of fan 300, makes the wind-guiding efficiency of fan 300 higher.

In some embodiments of the present utility model, as shown in fig. 3, a dimension of a side of the peak 431 facing away from the blower 300 in the circumferential direction of the blower 300 is smaller than a dimension of a side of the peak 431 facing toward the blower 300 in the circumferential direction of the blower 300.

For example, a side surface of the crest 431 away from the backflow section 420 may be parallel to an end surface of the second side 422, so that the end surface of the crest 431 is similar to the end surface of the second side 422, which may simplify the structure of the volute tongue 400 and facilitate processing.

By the arrangement, the dimension of the side, close to the fan 300, of the peak portion 431 in the circumferential direction of the fan 300 is shorter, and the dimension of the side, opposite to the fan 300, of the peak portion 431 in the circumferential direction of the fan 300 is longer, so that the surface of the side, opposite to the backflow section 420, of the peak portion 431 can incline relative to the thickness direction of the protruding section 430, the end surface area of the peak portion 431 is larger, airflow can be diffused in advance when flowing through the peak portion 431, the flow speed of the backflow airflow flowing through the peak portion 431 can be reduced, the airflow impact is avoided from being too large, the air inlet of the fan 300 is further increased, and the air guiding efficiency of the fan 300 is higher.

In addition, it should be noted that, in other embodiments of the present utility model, the end surface of the crest 431 may also extend along the thickness direction of the convex section 430, so that the end surface of the crest 431 may extend along the radial direction of the mold during the mold stripping, which is beneficial to simplifying the structure of the end surface of the crest 431, facilitating the mold stripping and facilitating the processing.

In some embodiments of the present utility model, as shown in fig. 3, 5-9, the volute tongue 400 also includes a connecting segment 440.

The connecting section 440 is respectively connected with the second side 422 of the backflow section 420 and the air outlet section 410, an included angle between the backflow section 420 and the air outlet section 410 is an acute angle, one side of the connecting section 440 facing the fan 300 is in smooth transition with the backflow section 420 and the air outlet section 410, and the windward side of the connecting section 440 is a curved surface. In this way, when the air flow led out by the fan 300 passes through the volute tongue 400, the windward side of the connection section 440 has better air flow guiding effect, and the air flow colliding with the connection section 440 can more smoothly flow to the backflow section 420 or the air outlet section 410, so that not only the air outlet efficiency and the backflow efficiency of the indoor unit 1 of the air conditioner can be improved, but also the noise generated when the air flow flows from the connection section 440 to the air outlet section 410 or the backflow section 420 can be reduced.

In some embodiments of the present utility model, as shown in fig. 8, the volute tongue 400 is provided with a first rib 450 and a plurality of second ribs 460.

The first reinforcing ribs 450 are arranged on one side of the backflow section 420, which is opposite to the fan 300, and adjacent to the second side 422, the second reinforcing ribs 460 are arranged on one side of the backflow section 420, which is opposite to the fan 300, and one side of the air outlet section 410, which is opposite to the fan 300, and a plurality of second reinforcing ribs 460 are arranged at intervals along the axial direction of the fan 300, and the second reinforcing ribs 460 are connected with the first reinforcing ribs 450.

Like this, through setting up the structural strength that first strengthening rib 450 can improve the one end of the adjacent protruding section 430 of backward flow section 420, the structural strength of backward flow section 420 is higher, and then can improve the joint strength of backward flow section 420 and protruding section 430, backward flow section 420 and protruding section 430 are difficult for taking place deformation more, simultaneously second strengthening rib 460 can connect backward flow section 420 respectively, joint segment 440 and air-out section 410, and then can utilize a plurality of second strengthening ribs 460 to improve the joint strength of backward flow section 420, joint segment 440 and air-out section 410, the overall structural strength of volute tongue 400 is higher, and then can avoid the volute tongue 400 to take place to warp, volute tongue 400 can not collide with fan 300, the operation of air conditioner indoor set 1 is safer.

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

The air conditioner indoor unit 1 in the present utility model performs a refrigeration cycle of the air conditioner indoor unit 1 by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant to the air that has been conditioned and heat exchanged.

The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner indoor unit 1 can adjust the temperature and humidity of the indoor space throughout the cycle.

In the description herein, reference to the term "particular embodiment," "particular example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

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

Claims

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

the shell is provided with an air inlet and an air outlet;

the heat exchanger is arranged in the shell and is used for exchanging heat with indoor air;

the fan is arranged in the shell, and the indoor air is guided into the shell from the air inlet through the operation of the fan, exchanges heat through the heat exchanger and is then guided back into the room from the air outlet;

the volute tongue comprises an air outlet section, a backflow section and a protruding section, wherein the backflow section is positioned in the shell and extends around the circumference of the fan, the backflow section is provided with a first side edge and a second side edge in the circumference of the fan, the first side edge is adjacent to the air outlet relative to the second side edge and is connected with the air outlet section, the air outlet section extends towards the direction close to the air outlet, and the second side edge is connected with the protruding section;

the fan comprises a fan body, a fan body and a fan, wherein one side of the protruding section, which is far away from the backflow section, is provided with a wave crest part and a wave trough part, the wave crest part and the wave trough part are alternately arranged and connected along the axial direction of the fan, and the wave trough part is in an arc shape with protruding two ends and recessed center in the axial direction of the fan.

2. The indoor unit of claim 1, wherein the number of trough portions and the number of peak portions are each an odd number greater than 1.

3. The indoor unit of claim 1, wherein a side of the peak portion remote from the return section is planar or curved.

4. An indoor unit for an air conditioner according to claim 1, wherein the thickness of the convex section is smaller than the thickness of the return section.

5. The indoor unit of claim 4, wherein a side of the convex section facing the fan and a side of the return section facing the fan are smoothly transitioned.

6. The indoor unit of claim 1, wherein the trough portion has a dimension L1 in a length direction of the convex section and the crest portion has a dimension L2 in a length direction of the convex section;

wherein 1< L1/L2<6.

7. The indoor unit of claim 1, wherein the trough portion has a dimension L3 in a width direction of the convex section and the crest portion has a dimension L2 in a length of the convex section;

wherein 1< L3/L2<8.

8. The indoor unit of claim 1, wherein a dimension of a side of the trough portion facing away from the blower in a circumferential direction of the blower is smaller than a dimension of a side of the trough portion facing toward the blower in the circumferential direction of the blower.

9. The indoor unit of claim 1, wherein a dimension of a side of the peak portion facing away from the blower in a circumferential direction of the blower is smaller than a dimension of a side of the peak portion facing toward the blower in the circumferential direction of the blower.

10. The indoor unit of claim 1, wherein the volute tongue is provided with a first reinforcing rib and a plurality of second reinforcing ribs, the first reinforcing rib is arranged on one side of the backflow section, which is opposite to the fan, and is adjacent to the second side edge, the second reinforcing rib is arranged on one side of the backflow section, which is opposite to the fan, and one side of the air outlet section, which is opposite to the fan, and the plurality of second reinforcing ribs are arranged at intervals along the axial direction of the fan, and the second reinforcing ribs are connected with the first reinforcing ribs.