CN218495099U - Indoor unit of air conditioner - Google Patents

Abstract

This application relates to the technical field of household electrical appliances, and discloses an air conditioner indoor unit, which includes a housing with an air duct cavity inside, and is provided with an air inlet and an air outlet connected to the air duct cavity; a heat exchanger is arranged on the housing Inside; the drainage groove is arranged at the bottom of the heat exchanger corresponding to the heat exchanger, and the side wall of the drainage groove is provided with ventilation holes so that a breeze channel is formed between the air duct cavity and the drainage groove; the fan is arranged in the air duct cavity , is used to drive air to enter from the air inlet, and flow out from the air outlet after being heat-exchanged by the heat exchanger; wherein, when the heat exchanger is used for heating, the high-temperature air enters the drainage groove through the breeze channel under the drive of the fan , to soften the oil in the drain tank. By adopting the air-conditioning indoor unit disclosed in the present application, the effect of degreasing the drain tank can be realized, and the failure rate can be effectively reduced.

Description

air conditioner indoor unit

technical field

The present application relates to the technical field of household appliances, for example, to an air conditioner indoor unit.

Background technique

With the continuous improvement of people's requirements for the quality of life, more and more families choose to install air conditioners in the kitchen to improve the comfort of the kitchen environment. Because the user will generate a lot of oil fume during the cooking process, it will adhere to the drainage groove inside the air conditioner indoor unit with the air flow.

Existing air-conditioning indoor units are usually provided with a heating device at the drain tank, and after softening the oil stain attached in the drain tank, it is discharged outdoors with condensed water.

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

By setting the heating device to soften the oil, the structure is complicated, which leads to an increase in the failure rate.

Utility model content

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

An embodiment of the present disclosure provides an air conditioner indoor unit to reduce a failure rate of the air conditioner indoor unit.

In some embodiments, the air-conditioning indoor unit includes: a housing with an air duct cavity inside, and an air inlet and an air outlet connected to the air duct cavity; a heat exchanger arranged in the housing Inside the body; a drainage groove, which is arranged at the bottom of the heat exchanger corresponding to the heat exchanger, and the side wall of the drainage groove is provided with ventilation holes, so that a gap is formed between the air duct cavity and the drainage groove. Breeze channel; fan, arranged in the air channel cavity, used to drive air to enter from the air inlet, and flow out from the air outlet after heat exchange in the heat exchanger; wherein, the heat exchanger is In the case of heating, the high-temperature air is driven by the fan and enters the drainage groove through the breeze passage, so as to soften the oil stain in the drainage groove.

In some embodiments, the housing further includes: a mounting platform, one side of which is configured on the inner side wall of the housing along the length direction of the air duct cavity; The length direction of the platform is configured on the other side of the installation platform, so that the volute tongue and the inner side wall of the housing define the drainage groove; wherein, the volute tongue is provided with the ventilation hole .

In some embodiments, a mounting platform is configured on the inner side wall of the housing in a direction away from the drainage groove, and a bottom end surface of the mounting platform is corresponding to and adapted to abut against the bottom end surface of the heat exchanger.

In some embodiments, the housing further includes: a rib configured at the bottom of the drainage groove along the length direction of the installation platform, so that the drainage groove forms a first drainage groove and a second drainage groove; Wherein, the ribs are provided with the ventilation holes, and the heat exchanger is placed on the ribs toward the side wall of the drainage tank.

In some embodiments, the ventilation holes on the ribs correspond to the ventilation holes on the volute tongue.

In some embodiments, the length of the rib is shorter than the length of the drainage groove, so that the first drainage groove communicates with the second drainage groove.

In some embodiments, one end of the casing corresponding to the drainage groove is configured with a sump, and the sump is provided with a drainage port.

In some embodiments, the number of the sump is two, and the two sumps are respectively configured at two ends of the drain.

In some embodiments, the air conditioner indoor unit further includes: a drain pipe, one end of which communicates with the drain port, and the other end extends to the outside of the casing.

In some embodiments, it also includes: an air deflector that can be opened and closed at the air outlet; a control module configured to control the heat exchanger, the fan, and the Operation of the wind deflector.

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

In the air conditioner indoor unit provided by the embodiments of the present disclosure, a ventilation hole is provided on the side wall of the drainage groove to form a breeze channel between the air duct cavity and the drainage groove. When the indoor unit of the air conditioner is in the heating mode, the high-temperature air enters the drainage groove through the breeze channel under the drive of the fan, so as to realize the softening of the oil stain in the drainage groove. Instead of setting a heating device for softening, such a setting form has a simple structure and can effectively reduce the failure rate.

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

Description of drawings

One or more embodiments are exemplified by the corresponding drawings, and these exemplifications and drawings do not constitute a limitation to the embodiments, and elements with the same reference numerals in the drawings are shown as similar elements, The drawings are not limited to scale and in which:

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

Fig. 2 is a partially enlarged schematic diagram of an air conditioner indoor unit provided by an embodiment of the present disclosure;

Fig. 3 is a schematic structural diagram of an air conditioner indoor unit provided by an embodiment of the present disclosure after removing part of the structure;

Fig. 4 is a schematic structural diagram of another air conditioner indoor unit provided by an embodiment of the present disclosure, with part of the structure removed.

Reference signs:

100: shell; 110: drainage groove; 111: installation platform; 112: spiral tongue; 113: rib; 114: ventilation hole; 120: mounting platform; 130: water collection tank; 200: heat exchanger; 300: fan; 400: air deflector.

Detailed ways

In order to understand the characteristics and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present disclosure. In the following technical description, 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 simplified in order to simplify the drawings.

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

In the embodiments of the present disclosure, the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear" etc. are based on the orientations or positional relationships shown in the drawings. Positional relationship. These terms are mainly used to better describe the embodiments of the present disclosure and their implementations, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. Moreover, some of the above terms may be used to indicate other meanings besides orientation or positional relationship, for example, the term "upper" may also be used to indicate a certain attachment relationship or connection relationship in some cases. Those skilled in the art can understand the specific meanings of these terms in the embodiments of the present disclosure according to specific situations.

In addition, the terms "setting", "connecting" and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediary, or two devices, components or Internal connectivity between components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure according to specific situations.

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

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

The term "and/or" is an associative relationship describing objects, indicating that there can be three relationships. For example, A and/or B means: A or B, or, A and B, these three relationships.

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

As shown in Figures 1-4, an embodiment of the present disclosure provides an air conditioner indoor unit, including a housing 100, a heat exchanger 200, a drainage tank 110, and a fan 300. The air inlet 140 and the air outlet of the air passage cavity are connected; the heat exchanger 200 is arranged inside the housing 100; the drain groove 110 is arranged at the bottom of the heat exchanger 200 corresponding to the heat exchanger 200, and the side wall of the drain groove 110 is provided with ventilation hole 114, so that a breeze channel is formed between the air duct cavity and the drainage groove 110; the fan 300 is arranged in the air duct cavity, and is used to drive air to enter from the air inlet 140, and flow out from the air outlet after heat exchange by the heat exchanger 200 Wherein, when the heat exchanger 200 is for heating, the high-temperature air enters the drain tank 110 through the breeze channel under the drive of the fan 300 to soften the oil in the drain tank 110 .

The fan 300 inside the air-conditioning indoor unit casing 100 drives the air in the environment where the air-conditioning indoor unit is located to enter through the air inlet 140, and flow out from the air outlet after being heat-exchanged by the heat exchanger 200, thereby realizing cooling or heating of the environment where the air-conditioning indoor unit is located .

Air conditioner indoor units are generally installed in the living room, bedroom or kitchen. When installed in the kitchen, a lot of oily fume will be generated in the kitchen, and when the air conditioner is running, the oily fume will enter the interior of the air conditioner indoor unit with the circulation of air, and thus adhere to the surface of the heat exchanger. During the heating process of the heat exchanger, condensed water will be generated on its surface, and the oil fume adhering to the surface of the heat exchanger will flow to the drainage tank along with the condensed water. After running for a long time, a layer of oil will form on the inner surface of the drainage tank, which will not only affect the normal flow of condensed water, but also make it difficult to clean the oil, thereby reducing user experience.

The existing way to remove oil stains is to install a heating component on the side wall of the drainage tank, and soften the oil stains in the drain tank by heating the drain tank. After the oil stains are softened, their fluidity will be enhanced, and they will be discharged out of the shell together with the condensed water, thereby achieving Cleaning of oil stains. Although this method of removing oil stains can effectively remove oil stains, the heating assembly will complicate the internal structure of the air-conditioning indoor unit, thereby leading to an increase in failure rate.

Therefore, in the air conditioner indoor unit provided by the embodiment of the present disclosure, the ventilation hole 114 is opened on the side wall of the drain groove 110 to form a breeze channel between the air duct cavity and the drain groove 110 . When the air-conditioning indoor unit is in the heating mode, the high-temperature air enters the drainage groove 110 through the breeze channel driven by the fan 300 , so as to soften the oil in the drainage groove 110 . Instead of setting a heating device for softening, such a setting form has a simple structure and can effectively reduce the failure rate.

Optionally, the housing 100 also includes a mounting platform 111 and a volute tongue 112, one side of the mounting platform 111 is configured on the inner side wall of the housing 100 along the length direction of the air duct cavity; It is constructed on the other side of the installation platform 111 so that the volute tongue 112 and the inner side wall of the housing 100 enclose and define a drainage groove 110 ; wherein, the volute tongue 112 is provided with a ventilation hole 114 .

The installation platform 111 is formed on the inner side wall of the housing 100 along the length direction of the air duct cavity, and the volute tongue 112 is formed along the length direction of the installation platform 111 . Specifically, the mounting platform 111 is located on the air outlet side of the air duct cavity.

With such an arrangement, when the fan 300 drives the air to circulate, when the airflow passes near the volute tongue 112, the volute tongue 112 divides the airflow into two parts. Most of the air flows to the air outlet of the indoor unit of the air conditioner, and a small part of the air flows back to the air duct cavity through the gap between the volute tongue 112 and the fan 300 blades, and returns to the air duct cavity after rotating with the fan 300 blades for one revolution. Cochlear tongue 112 is involved in the new shunt. By constructing the volute tongue 112 on the air outlet side of the air channel cavity, the air can be prevented from circulating only in the air channel cavity driven by the fan 300 , so that the air outlet efficiency can be effectively improved.

One side of the installation platform 111 is connected to the inner side wall of the housing 100 , and the top end surface of the other side is configured with a volute tongue 112 . In this way, the volute tongue 112, the mounting platform 111 and the inner side wall of the housing 100 can enclose and define the drainage groove 110, that is, the volute tongue 112 is a side wall of the drainage groove 110 facing the air duct cavity, and the inner side wall of the housing 100 is The other side wall of the drain tank 110 , the mounting platform 111 is the bottom of the drain tank 110 . The drainage groove 110 is provided in such an arrangement form, which has a simple structure, is convenient for processing, and reduces the number of internal parts of the air conditioner indoor unit. Furthermore, while effectively reducing the failure rate, it is also possible to avoid water leakage in the indoor unit of the air conditioner caused by the displacement of the drainage groove 110 due to external forces, thereby reducing user experience.

A ventilation hole 114 is provided on the volute tongue 112 , that is, a ventilation hole 114 is provided on the side wall of the drainage groove 110 facing the air duct cavity. In this way, when the heat exchanger 200 is used for heating, when the high-temperature air flow is divided at the volute tongue 112 , a small part of the air flow enters the drainage groove 110 through the ventilation hole 114 . The high-temperature air softens the oil stains in the drainage tank 110 , and then the flowing oil stains are discharged out of the casing 100 along with the condensed water. Adopting such an arrangement form, the structure is simple and the processing is convenient.

Optionally, a mounting platform 120 is configured on the inner sidewall of the housing 100 in a direction away from the drainage groove 110 , and the bottom end surface of the mounting platform 120 corresponds to and fits against the bottom end surface of the heat exchanger 200 .

A mounting platform 120 is constructed on the inner sidewall of the housing 100 in a direction away from the drainage groove 110 , and the bottom end surface of the heat exchanger 200 is mounted on the mounting platform 120 . In this way, on the one hand, it is convenient to fix the heat exchanger 200;

The bottom end surface of the erecting platform 120 corresponds to the bottom end surface of the heat exchanger 200 and fits in contact with it. Such a setting form can effectively improve the stability of the heat exchanger 200 and avoid displacement due to external force factors, thereby Affect the heat transfer performance of the indoor unit of the air conditioner.

Optionally, the housing 100 further includes ribs 113, and the ribs 113 are configured at the bottom of the drainage groove 110 along the length direction of the installation platform 111, so that the drainage groove 110 forms the first drainage groove 110 and the second drainage groove 110; wherein , the ribs 113 are provided with ventilation holes 114 , and the side wall of the heat exchanger 200 facing the drainage tank 110 is placed on the ribs 113 .

Ribs 113 are provided at the bottom of the housing 100 along the length direction of the installation platform 111 to serve as a support. The bottom end surface of the heat exchanger 200 is placed on the mounting platform 120 , and the side wall of the heat exchanger 200 facing the drainage tank 110 is placed on the rib 113 . By adopting such an arrangement form, the fixing stability of the heat exchanger 200 can be further improved.

The ribs 113 arranged at the bottom of the drainage groove 110 divide the drainage groove 110 into two parts, the first drainage groove 110 and the second drainage groove 110. The inner wall of the housing 100 and the ribs 113 jointly define the first drainage groove 110, and the ribs 113 and the volute tongue 112 jointly define the second drainage groove 110 . Furthermore, ventilation holes 114 are also provided on the ribs 113 . In this way, the high-temperature air flows into the second drainage groove 110 through the vent holes on the volute tongue 112 to soften the oil stains in the second drainage groove 110, and enters into the first drainage groove 110 through the ventilation holes 114 on the ribs 113 to soften the oil stains in the second drainage groove 110. A greasy dirt in the gutter 110.

By opening the ventilation holes 114 on the ribs 113, it can be ensured that the oil stains in the first drainage groove 110 and the second drainage groove 110 can be softened, thereby effectively improving the cleaning effect of the cleaning drainage groove 110 and improving the user's use. experience.

Optionally, the ventilation holes 114 on the ribs 113 correspond to the ventilation holes 114 on the volute tongue 112 .

By making the ventilation holes 114 on the ribs 113 correspond to the ventilation holes 114 on the volute tongue 112, such an arrangement can effectively improve the efficiency of high-temperature airflow entering the first drainage groove 110, so that it can Effectively improve the cleaning efficiency and cleaning effect of cleaning the drainage tank 110, improve user experience, and effectively save electric energy.

Optionally, the length of the rib 113 is shorter than that of the drainage groove 110 , so that the first drainage groove 110 communicates with the second drainage groove 110 .

By making the ribs 113 shorter than the drainage groove 110 , the first drainage groove 110 communicates with the second drainage groove 110 . Furthermore, it can effectively avoid the clogging of condensed water and oil, thereby affecting the performance of the indoor unit of the air conditioner.

Exemplarily, the drain port 131 of the drain tank 110 is opened at one end of the first drain tank 110, and after the oil in the first drain tank 110 and the second drain tank 110 is softened by the high-temperature air flow, the first drain tank 110 The oily dirt is discharged from the drain port 131 to the outside of the casing. The first drainage groove 110 communicates with the second drainage groove 110 , and the oil in the second drainage groove 110 can flow through the first drainage groove 110 and then flow out of the casing from the drain outlet 131 of the first drainage groove 110 .

Optionally, one end of the housing 100 corresponding to the drainage groove 110 is configured with a sump 130 , and the sump 130 is provided with a drainage port 131 .

A sump 130 is configured at one end of the drain 110 , and a drain 131 is opened in the sump 130 . In this way, the condensed water and oil stains in the first drainage tank 110 and the second drainage tank 110 flow into the sump 130 first, and then are discharged from the drain 131 of the sump 130 . Adopting such an arrangement form shortens the flow of oil stains in the second drainage groove 110 , and further avoids the blockage of oil stains.

Optionally, there are two water collection grooves 130 , and the two water collection grooves 130 are respectively configured at two ends of the drainage groove 110 .

By constructing the water collection tank 130 at both ends of the drain tank 110 , such an arrangement can effectively increase the outflow speed of condensed water and oil stains, thereby effectively improving the cleaning efficiency of the drain tank 110 .

Optionally, the air conditioner indoor unit further includes a drain pipe, one end of the drain pipe communicates with the drain port 131 , and the other end extends to the outside of the casing 100 .

By providing a drain pipe, one end of the drain pipe communicates with the drain port 131 , and the other end extends to the outside of the housing 100 . With such a setting form, the user can set the length of the drain pipe by himself according to his actual needs. For example, one end of the drain pipe is connected to the drain port 131, and the other end is extended to an indoor bucket; or one end of the drain pipe is connected to the drain port 131, and the other end is extended to the outside.

By setting the drainage pipe, the user's flexibility in collecting condensed water or oil can be effectively improved, thereby improving the user's experience.

Optionally, the air conditioner indoor unit further includes an air deflector 400 and a control module, the air deflector 400 is arranged at the air outlet in an openable and closable manner; the control module is configured to control the heat exchanger 200, Operation of the fan 300 and the wind deflector 400 .

An air deflector 400 is openably and closably arranged at the air outlet, and the air outlet is opened or closed by controlling the air deflector 400 , and the air outlet direction of the air outlet is adjusted.

Specifically, when the control module receives the power-on command, it controls the opening of the air guide plate 400, so that the air in the environment where the air-conditioning indoor unit is located enters from the air inlet 140 under the drive of the fan 300, and exchanges heat through the heat exchanger 200. Then flow out from the air outlet.

Further, the user can adjust the rotation angle of the wind deflector 400 according to actual needs, and the control module controls the rotation of the wind deflector 400 in response to the adjustment instruction. In this way, the user's comfort can be effectively improved.

The control module controls the closing of the wind deflector 400 when receiving the shutdown instruction. By closing the air deflector 400, it is effectively prevented that dust or sundries enter the interior of the air conditioner indoor unit through the air outlet, thereby affecting the normal operation of the air conditioner indoor unit.

The control module is further configured to control the operation of the heat exchanger 200 , the fan 300 and the air deflector 400 under the condition of receiving the degreasing command.

The air-conditioning indoor unit provided by the embodiment of the present disclosure softens the oil stain in the drainage tank 110 through high-temperature airflow.

Specifically, when the control module receives the degreasing instruction, it controls the heat exchanger 200 to heat, the fan 300 to rotate, and at the same time controls the closing of the air deflector 400 until the airflow temperature reaches the first preset temperature; When the first preset temperature is reached, control the heat exchanger 200 to run at the current temperature for the first preset time; control the wind deflector 400 to open, and the heat exchanger 200 to cool down until the airflow temperature reaches the second preset temperature; When the temperature of the airflow reaches the second preset temperature, the heat exchanger 200 is controlled to run continuously for the second preset time; the first preset temperature is greater than the second preset temperature.

Exemplarily, when the control module of the air conditioner indoor unit receives the degreasing command, it controls the wind deflector 400 to close and the fan 300 to rotate to drive air from the air inlet 140 into the air duct cavity. The control module controls the heat exchanger 200 to heat, so that the temperature of the airflow in the air duct cavity rises to a first preset temperature. The first preset temperature may be any value in [58, 62]°C, for example, 59°C, 60°C, 61°C. Then the control module controls the heat exchanger 200 to run at the current power for a first preset time period. The first preset duration may be 10 minutes. During this process, the air flow enters the first drainage groove 110 and the second drainage groove 110 respectively through the ventilation holes 114 on the volute tongue 112 and the ventilation holes 114 on the rib 113 to soften the first drainage groove 110 and the second drainage groove Oil pollution in 110. As the temperature of the airflow increases gradually, the fluidity of the oily dirt increases, and then the oily dirt in the first drain tank 110 and the second drain tank 110 can flow to the sump 130 within the first preset time period, and It is discharged from the drain port 131 of the sump 130 .

Further, the control module controls the air deflector 400 to be turned on, and the heat exchanger 200 is operated to cool down until the temperature of the airflow drops to the second preset temperature. The second preset temperature may be 30°C. Then the control module controls the heat exchanger 200 to run for a second preset time, which may be 10 minutes. During the cooling process, the cooling rate can be effectively increased by opening the air deflector 400 . By controlling the cooling operation of the heat exchanger 200 , condensed water is formed on the surface of the heat exchanger 200 , and the condensed water flows into the drainage tank 110 under the action of gravity.

In this way, after the oil stain is softened and discharged, it is further washed by condensed water, which can effectively improve the cleaning effect of the cleaning drainage tank 110, thereby effectively avoiding residues due to thicker oil stains.

In the embodiment of the present disclosure, the degreasing command may be executed periodically, for example, the degreasing command is executed every 24 hours of operation of the air conditioner indoor unit; it may also be executed after each shutdown of the air conditioner indoor unit, which is not specifically limited.

Optionally, the air-conditioning indoor unit further includes a detection module configured to detect whether a shutdown command is received when degreasing is completed; if the shutdown command is not received, the control module controls the air-conditioning indoor unit to run in an initial state .

By setting the detection module, after the degreasing is completed, it is detected whether a shutdown command is received. If the shutdown command is not received, the control module controls the air-conditioning indoor unit to run in an initial state, which is the running state before executing the degreasing command. If a shutdown command is received, the control module controls the shutdown of the air-conditioning room after the degreasing is completed.

Adopting such a setting form replaces the manual adjustment of the operation mode by the user to restore the air conditioner indoor unit to the initial state, which can effectively improve the convenience of the user and enhance the user experience.

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

Claims (10)

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

the air duct comprises a shell, a fan body and a fan blade, wherein an air duct cavity is formed inside the shell, and an air inlet and an air outlet which are communicated with the air duct cavity are formed in the shell;

the heat exchanger is arranged inside the shell;

the drainage groove is arranged at the bottom of the heat exchanger corresponding to the heat exchanger, and a ventilation hole is formed in the side wall of the drainage groove so that a breeze channel is formed between the air duct cavity and the drainage groove;

the fan is arranged in the air duct cavity and used for driving air to enter from the air inlet and flow out from the air outlet after heat exchange of the air by the heat exchanger;

under the condition that the heat exchanger is used for heating, high-temperature air enters the drainage groove through the breeze channel under the driving of the fan so as to soften oil stains in the drainage groove.

2. An indoor unit of an air conditioner according to claim 1, wherein the casing further includes:

one side of the mounting platform is constructed on the inner side wall of the shell along the length direction of the air duct cavity;

the volute tongue is arranged on the other side of the mounting platform along the length direction of the mounting platform, so that the volute tongue and the inner side wall of the shell enclose to define the drainage groove;

wherein, the volute tongue is provided with the vent hole.

3. An indoor unit of an air conditioner according to claim 2,

the inner side wall of the shell is provided with a standing table towards the direction far away from the drainage groove, and the bottom end face of the standing table corresponds to and is in adaptive butt joint with the bottom end face of the heat exchanger.

4. An indoor unit of an air conditioner according to claim 3, wherein the casing further includes:

the rib is formed at the bottom of the drainage groove along the length direction of the mounting table, so that the drainage groove forms a first drainage groove and a second drainage groove;

the vent holes are formed in the ribs, and the heat exchanger is arranged on the ribs in a lapping mode towards the side wall of the drainage groove.

5. An indoor unit of an air conditioner according to claim 4,

the vent hole on the rib corresponds to the vent hole on the volute tongue.

6. An indoor unit of an air conditioner according to claim 4,

the length of rib is less than the length of water drainage tank to make first water drainage tank with the second water drainage tank is linked together.

7. An indoor unit of an air conditioner according to claim 1,

the shell is provided with a water collecting tank corresponding to one end of the water drainage tank, and the water collecting tank is provided with a water outlet.

8. An indoor unit of an air conditioner according to claim 7,

the number of the water collecting grooves is two, and the two water collecting grooves are respectively formed at two ends of the drainage groove.

9. An indoor unit of an air conditioner according to claim 7, further comprising:

and one end of the water discharge pipe is communicated with the water discharge port, and the other end of the water discharge pipe extends to the outside of the shell.

10. An indoor unit of an air conditioner according to any one of claims 1 to 9, further comprising:

the air deflector can be arranged at the air outlet in an opening and closing manner;

a control module configured to control operation of the heat exchanger, the fan, and the air deflection plate upon receipt of a degreasing command.

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